Merge branch 'master' into feat/new-fs-api

.github/FUNDING.yml

@@ -1 +1 @@
-custom: ["https://www.paypal.com/paypalme/my/profile"]
+custom: ["https://paypal.me/littlevgl?locale.x=en_US"]

CHANGELOG.md

@@ -1,20 +1,49 @@
 # Changelog
 
-## v7.4.0 (planned on 18.08.2020)
+## v7.4.0 (planned on 01.09.2020)
-*Available in the `dev` branch*
 
-## v7.3.0 (planned on 04.08.2020)
+### New features
-*Available in the `master` branch*
+- arc: add set value by click feature
+- arc: add `LV_ARC_PART_KNOB` similarly to slider
+- send gestures even is the the obejct was dragged. User can check dragging with `lv_indev_is_dragging(lv_indev_act())` in the event function. 
+- Add `lv_font_load()` function - Loads a `lv_font_t` object from a binary font file
+- Add `lv_font_free()` function - Frees the memory allocated by the `lv_font_load()` function
+- Add style caching to reduce acces time of properties with default value
+
+### Bugfixes
+- Fix color bleeding on border drawing
+- Fix using 'LV_SCROLLBAR_UNHIDE' after 'LV_SCROLLBAR_ON'
+- Fix croping of last column/row if an image is zoomed
+- Fix zooming and rotateing mosaic images7
+- Fix deleting tabview with LEFT/RIGHT tab position
+
+## v7.3.1 (18.08.2020)
+
+### Bugfixes
+- Fix drawing value string twice
+- Rename  `lv_chart_clear_serie` to `lv_chart_clear_series` and `lv_obj_align_origo` to `lv_obj_align_mid`
+- Add linemeter's mirror feature again
+- Fix text decor (udnerline strikethrough) with older versions of font converter
+- Fix setting local style property multiple times 
+- Add missing background drawing and radius handling to image button
+- Allow adding extra label to list buttons
+- Fix crash if `lv_table_set_col_cnt` is called before `lv_table_set_row_cnt` for the first time
+- Fix overflow in large image transformations
+- Limit extra button click area of button matrix's buttons. With large paddings it was counter intuitive. (Gaps are mapped to button when clicked).
+- Fix `lv_btnmatrix_set_one_check` not forcing exactly one button to be checked
+- Fix color picker invalidation in rectangle mode
+- Init disabled days to gray color in calendar
+
+## v7.3.0 (04.08.2020)
 
 ### New features
 - Add `lv_task_get_next`
 - Add `lv_event_send_refresh`, `lv_event_send_refresh_recursive` to easily send `LV_EVENT_REFRESH` to object
 - Add `lv_tabview_set_tab_name()` function - used to change a tab's name
 - Add `LV_THEME_MATERIAL_FLAG_NO_TRANSITION` and `LV_THEME_MATERIAL_FLAG_NO_FOCUS` flags
-- Reduce code size by adding: `LV_USE_FONT_COMPRESSED`, `LV_FONT_USE_SUBPX`, `LV_USE_OUTLINE`, `LV_USE_PATTERN`, `LV_USE_VALUE_STR`  and applying some optimization
+- Reduce code size by adding: `LV_USE_FONT_COMPRESSED` and `LV_FONT_USE_SUBPX` and applying some optimization
 - Add `LV_MEMCPY_MEMSET_STD` to use standard `memcpy` and `memset`
 
-
 ### Bugfixes
 - Do not print warning for missing glyph if its height OR width is zero.
 - Prevent duplicated sending of `LV_EVENT_INSERT` from text area

README.md

@@ -1,8 +1,4 @@
 <h1 align="center"> LVGL - Light and Versatile Graphics Library</h1>
-<p align="center">
-<a href="https://github.com/lvgl/lvgl/blob/master/LICENCE.txt"><img src="https://img.shields.io/badge/licence-MIT-blue.svg"></a>
-<a href="https://github.com/lvgl/lvgl/releases/tag/v7.0.0"><img src="https://img.shields.io/badge/version-7.1.0-blue.svg"></a>
-</p>
 
 <p align="center">
 <img src="https://lvgl.io/assets/images/img_1.png">

a.patch

@@ -0,0 +1,29 @@
+diff --git a/scripts/release.py b/scripts/release.py
+index 28370c66..bc5234e7 100755
+--- a/scripts/release.py
++++ b/scripts/release.py
+@@ -395,12 +395,12 @@ def docs_update_dev_version():
+     os.chdir("../")
+ 
+ 
+-def publish_dev():   
++def publish_dev_and_master():   
+     pub_cmd = "git checkout dev; git push origin dev"
+     cmd("cd lvgl; " + pub_cmd)    
++    pub_cmd = "git checkout master; git push origin master"
++    cmd("cd lvgl; " + pub_cmd)    
+ 
+-    pub_cmd = "git checkout dev; git push origin dev"
+-    cmd("cd docs; " + pub_cmd)    
+     cmd("cd docs; git checkout master; ./update.py latest dev")
+ 
+ def cleanup():
+@@ -463,7 +463,7 @@ if __name__ == '__main__':
+ 
+         lvgl_update_dev_version()
+         docs_update_dev_version()
+-        publish_dev()
++        publish_dev_and_master()
+         
+     cleanup()
+     

docs/ROADMAP.md

@@ -23,6 +23,10 @@ Planned to September/October 2020
   - Work in progress
 - Add new label alignment modes
   - See [#1656](https://github.com/lvgl/lvgl/issues/1656)
+- Remove the align parameter from `lv_canvas_draw_text`
+
+## v9
+- Simplify `group`s. Discussion is [here](https://forum.lvgl.io/t/lv-group-tabindex/2927/3).
 
 ## Ideas
 - Unit testing (gtest?). See [#1658](https://github.com/lvgl/lvgl/issues/1658)
@@ -31,4 +35,5 @@ Planned to September/October 2020
 - Optmize font decompression
 - Switch to RGBA colors in styles
 - Need coverage report for tests
-- Need static analize (via coverity.io or somehing else). 
+- Need static analize (via coverity.io or somehing else)
+- Support dot_begin and dot_middle long modes for labels

examples/arduino/README.md

@@ -10,7 +10,7 @@ To get all this to work you have to setup TFT_eSPI to work with your TFT display
 
 LVGL library has its own configuration file called `lv_conf.h`. When LVGL is installed to followings needs to be done to configure it:
 1. Go to directory of the installed Arduno libraries
-2. Go to `lvgl` and copy `lv_conf_template.h` as `lvgl.h` next to the `lvgl` folder.
+2. Go to `lvgl` and copy `lv_conf_template.h` as `lv_conf.h` next to the `src` folder.
 3. Open `lv_conf.h` and change the first `#if 0` to `#if 1`
 4. Set the resolution of your display in `LV_HOR_RES_MAX` and `LV_VER_RES_MAX`
 5. Set the color depth of you display in `LV_COLOR_DEPTH`

library.json

@@ -1,6 +1,6 @@
 {
 	"name": "lvgl",
-    "version": "7.3.0",
+    "version": "7.3.1",
 	"keywords": "graphics, gui, embedded, tft, lvgl",
 	"description": "Graphics library to create embedded GUI with easy-to-use graphical elements, beautiful visual effects and low memory footprint. It offers anti-aliasing, opacity, and animations using only one frame buffer.",
 	"repository": {

library.properties

@@ -0,0 +1,10 @@
+name=lvgl
+version=7.3.1
+author=kisvegabor
+maintainer=kisvegabor,embeddedt,pete-pjb
+sentence=Full-featured Graphics Library for Embedded Systems
+paragraph=Powerful and easy-to-use embedded GUI with many widgets, advanced visual effects (opacity, antialiasing, animations) and low memory requirements (16K RAM, 64K Flash).
+category=Display
+url=https://lvgl.io
+architectures=*
+includes=lvgl.h

lv_conf_template.h

@@ -1,6 +1,6 @@
 /**
  * @file lv_conf.h
- * Configuration file for LVGL v7.3.0
+ * Configuration file for v7.6.0-dev-dev
  */
 
 /*
@@ -687,6 +687,9 @@ typedef void * lv_obj_user_data_t;
 #  define LV_ROLLER_INF_PAGES         7
 #endif
 
+/*Rotary (dependencies: lv_arc, lv_btn)*/
+#define LV_USE_ROTARY     1
+
 /*Slider (dependencies: lv_bar)*/
 #define LV_USE_SLIDER    1
 

lvgl.h

@@ -10,6 +10,15 @@
 extern "C" {
 #endif
 
+
+/***************************
+ * CURRENT VERSION OF LVGL
+ ***************************/
+#define LVGL_VERSION_MAJOR   7
+#define LVGL_VERSION_MINOR   4
+#define LVGL_VERSION_PATCH   0
+#define LVGL_VERSION_INFO "dev"
+
 /*********************
  *      INCLUDES
  *********************/
@@ -31,6 +40,7 @@ extern "C" {
 #include "src/lv_themes/lv_theme.h"
 
 #include "src/lv_font/lv_font.h"
+#include "src/lv_font/lv_font_loader.h"
 #include "src/lv_font/lv_font_fmt_txt.h"
 #include "src/lv_misc/lv_printf.h"
 
@@ -75,11 +85,6 @@ extern "C" {
 /*********************
  *      DEFINES
  *********************/
-/*Current version of LVGL*/
-#define LVGL_VERSION_MAJOR   7
-#define LVGL_VERSION_MINOR   3
-#define LVGL_VERSION_PATCH   0
-#define LVGL_VERSION_INFO ""
 
 /**********************
  *      TYPEDEFS

scripts/release.py

@@ -1,255 +1,469 @@
 #!/usr/bin/env python
- 
+
+# Release lvgl, lv_examples, lv_drivers. docs, blog and prepare the development of the next major, minoror bugfix release
+# Usage: ./release,py bugfix | minor | major
+# The option means what type of versin to prepare for development after release
+#
+# STEPS:
+#  - clone all 5 repos
+#  - get the version numnber from lvgl.h
+#  - set release branch (e.g. "release/v7")
+#  - prepare lvgl
+#    - run lv_conf_internal.py
+#    - run code formatter 
+#    - clear LVGL_VERSION_INFO (set to "")
+#    - run Doxygen 
+#    - update the version in lvgl's library.json, library.properties, lv_conf_template.h
+#    - update CHANGELOG.md
+#    - commit changes 
+#  - prepare lv_examples
+#    - upadte the required LVGL version in lv_examples.h (LV_VERSION_CHECK) 
+#    - update the version in lv_ex_conf_template.h
+#  - prepare lv_drivers
+#    - update the version in library.json, lv_drv_conf_template.h      
+#  - prepare docs
+#    - update API XML 
+#    - clear the versiopn info (should be plain vx.y.z)
+#  - tag all repos with the new version
+#  - merge to release branches
+#  - blog: add release post
+#  - push tags and commits
+#  - docs: run ./updade.py release/vX
+#
+# If --patch
+#  - merge master to dev branches
+#  - increment patch version by 1 and append "-dev". E.g. "vX.Y.(Z+1)-dev"
+#  - update version numbers in lvgl and docs
+#  - commit and push
+#  - docs: run ./updade.py latest dev
+#
+# Else (not --patch)
+#  - merge master to dev  
+#  - merge the dev to master
+#  - increment version number like "vX.(Y+1).0-dev"
+#  - apply the new version in dev branches of lvgl, lv_examples, lv_drivers, docs
+#  - commit and push to dev branches
+#  - docs: run ./updade.py latest dev
+
 import re
-import os
+import os, fnmatch
-lastNum = re.compile(r'(?:[^\d]*(\d+)[^\d]*)+')
+import os.path
+from os import path
+from datetime import date
+import sys
 
-   
+upstream_org_url = "https://github.com/lvgl/"
-def title(t):
+workdir = "./release_tmp"
-  print("\n---------------------------------")
-  print(t)
-  print("---------------------------------")
 
-   
+ver_major = -1
-def cmd(c):
+ver_minor = -1
+ver_patch = -1
+
+ver_str = ""
+dev_ver_str = ""
+release_br = ""
+release_note = ""
+
+prepare_type = ['major', 'minor', 'bugfix']
+
+dev_prepare = 'minor'
+
+def upstream(repo):
+    return upstream_org_url + repo + ".git"
+
+def cmd(c, exit_on_err = True):
   print("\n" + c)
   r = os.system(c)       
   if r:
     print("### Error: " + str(r))
-
+    if exit_on_err: exit(int(r))
-def lvgl_clone():
-  title("lvgl: Clone")
-  cmd("git clone https://github.com/lvgl/lvgl.git")
-  os.chdir("./lvgl")
-  cmd("git co master") 
-
-def lvgl_format():
-  title("lvgl: Run code formatter")
-  os.chdir("./scripts")
-  cmd("./code-format.sh")
-  os.system("git ci -am 'Run code formatter'")
-  os.chdir("..")
-
-def lvgl_update_version():
-  title("lvgl: Update version number")
-
-  f = open("./lvgl.h", "r")
-      
-  outbuf = ""
-  major_ver = -1
-  minor_ver = -1
-  patch_ver = -1
-      
-  for i in f.read().splitlines():
-    r = re.search(r'^#define LVGL_VERSION_MAJOR ', i)
-    if r: 
-      m = lastNum.search(i)
-      if m: major_ver = m.group(1)
-
-    r = re.search(r'^#define LVGL_VERSION_MINOR ', i)
-    if r: 
-      m = lastNum.search(i)
-      if m: minor_ver = m.group(1)
-      
-    r = re.search(r'^#define LVGL_VERSION_PATCH ', i)
-    if r: 
-      m = lastNum.search(i)
-      if m: patch_ver = m.group(1)
-     
-      
-    r = re.search(r'^#define LVGL_VERSION_INFO ', i)
-    if r: 
-      i = "#define LVGL_VERSION_INFO \"\""
-       
-    outbuf += i + '\n'
-   
-  f.close()
-
-  f = open("./lvgl.h", "w")
-      
-  f.write(outbuf)
-  f.close()
     
-  s = "v" + str(major_ver) + "." + str(minor_ver) + "." + str(patch_ver)
+def define_set(fn, name, value):    
-  print("New version:" + s)
+    print("In " + fn + " set " + name + " to " + value)
-  return s
+    
-
+    new_content = ""
-
+    f = open(fn, "r")
-
-def lvgl_update_library_json(v):
-  title("lvgl: Update version number in library.json")
-
-  f = open("./library.json", "r")
-  vn = v[1:]    
-  outbuf = ""
       
-  for i in f.read().splitlines():
+    for i in f.read().splitlines():
-    r = re.search(r'"version": ', i)
+        r = re.search(r'^ *# *define +' + name, i)
-    if r: 
+        if r: 
-      i = '    "version": "' + vn + '",'
+            d = i.split("define")
-       
+            i = d[0] + "define " + name + " " + value 
-    outbuf += i + '\n'
+        new_content += i + '\n'
-   
+     
-  f.close()
+    f.close()
+    
+    f = open(fn, "w")
+    f.write(new_content)
+    f.close()
+    
+def clone_repos():
+    cmd("rm -fr " + workdir)
+    cmd("mkdir " + workdir)
+    os.chdir(workdir)
 
-  f = open("./library.json", "w")
+    #For debuging just copy the repos
+    #cmd("cp -a ../repos/. .")
+    #return
+
+    cmd("git clone " + upstream("lvgl") + " lvgl; cd lvgl; git checkout master")
+    cmd("git clone " + upstream("lv_examples") + "; cd lv_examples; git checkout master")
+    cmd("git clone " + upstream("lv_drivers") + "; cd lv_drivers; git checkout master")
+    cmd("git clone --recurse-submodules " + upstream("docs") + "; cd docs; git checkout master")
+    cmd("git clone " + upstream("blog") + "; cd blog; git checkout master")
+
+def get_lvgl_version(br):
+    print("Get LVGL's version")
+    
+    global ver_str, ver_major, ver_minor, ver_patch, release_br 
+    
+    os.chdir("./lvgl")
+    
+    cmd("git checkout " + br)
+    
+    f = open("./lvgl.h", "r")
       
-  f.write(outbuf)
+    lastNum = re.compile(r'(?:[^\d]*(\d+)[^\d]*)+')
-  f.close()
+    for i in f.read().splitlines():
+        r = re.search(r'^#define LVGL_VERSION_MAJOR ', i)
+        if r: 
+            m = lastNum.search(i)
+            if m: ver_major = m.group(1)
 
-def lvgl_update_lv_conf_templ(ver_str):
+        r = re.search(r'^#define LVGL_VERSION_MINOR ', i)
-  title("lvgl: Update version number in lv_conf_template.h")
+        if r: 
-  cmd("sed -i -r 's/v[0-9]+\.[0-9]+\.[0-9]+/"+ ver_str +"/' lv_conf_template.h ")
+            m = lastNum.search(i)
-
+            if m: ver_minor = m.group(1)
-
-def lvgl_commit_push(v):
-  title("lvgl: commit and push release")
-
-  os.system('git ci -am "Release ' + v + '"')
-  cmd('git tag -a ' + v + ' -m "Release ' + v +'"')
-  cmd('git push origin master')
-  cmd('git push origin ' + v)
-
-
-def lvgl_merge_to_release_branch(v):
-  title("lvgl: merge to release branch")
-  cmd('git co release/v7')
-  cmd('git merge master')
-  cmd('git push origin release/v7')
-  os.chdir("../")
-  
-  
-def lvgl_update_api_docs():
-  title("lvgl: Update API with Doxygen")
-
-  cmd("cd scripts; doxygen");
-
-
-def examples_clone():
-  title("examples: Clone")
-  cmd("git clone https://github.com/lvgl/lv_examples.git")
-  os.chdir("./lv_examples")
-  cmd("git co master") 
-
-def examples_commit_push(v):
-  title("examples: commit and push release")
-
-  os.system('git ci -am "Release ' + v + '"')
-  cmd('git tag -a ' + v + ' -m "Release ' + v +'"')
-  cmd('git push origin master')
-  cmd('git push origin ' + v)
-
-
-def examples_merge_to_release_branch(v):
-  title("examples: merge to release branch")
-  cmd('git co release/v7')
-  cmd('git merge master')
-  cmd('git push origin release/v7')
-  os.chdir("../")
-  
-  
-def drivers_clone():
-  title("drivers: Clone")
-  cmd("git clone https://github.com/lvgl/lv_drivers.git")
-  os.chdir("./lv_drivers")
-  cmd("git co master") 
-
-def drivers_commit_push(v):
-  title("drivers: commit and push release")
-
-  os.system('git ci -am "Release ' + v + '"')
-  cmd('git tag -a ' + v + ' -m "Release ' + v +'"')
-  cmd('git push origin master')
-  cmd('git push origin ' + v)
-
-def drivers_merge_to_release_branch(v):
-  title("drivers: merge to release branch")
-  cmd('git co release/v7')
-  cmd('git merge master')
-  cmd('git push origin release/v7')
-  os.chdir("../")
-
-def docs_clone():
-  title("docs: Clone")
-  cmd("git clone --recursive https://github.com/lvgl/docs.git")
-  os.chdir("./docs")
-
-def docs_get_api():
-  title("docs: Get API files")
-  
-  cmd("git co latest --") 
-  cmd("rm -rf xml");  
-  cmd("cp -r ../lvgl/docs/api_doc/xml .");  
-  cmd("git add xml");
-  cmd('git commit -m "update API"')  
-
-def docs_update_version(v):
-  title("docs: Update version number")
-
-  f = open("./conf.py", "r")
       
-  outbuf = ""
+        r = re.search(r'^#define LVGL_VERSION_PATCH ', i)
-      
+        if r: 
-  for i in f.read().splitlines():
+            m = lastNum.search(i)
-    r = re.search(r'^version = ', i)
+            if m: ver_patch = m.group(1)
-    if r: 
+     
-      i = "version = '" + v + "'"
+    f.close()
+    
+    cmd("git checkout master")
+    
+    ver_str =  "v" + str(ver_major) + "." + str(ver_minor) + "." + str(ver_patch)
+    print("New version:" + ver_str)
+    
+    release_br = "release/v" + ver_major
+    
+    os.chdir("../")
+    
+def update_version():
+    templ = fnmatch.filter(os.listdir('.'), '*templ*')
+    
+    if templ[0]:    
+        print("Updating version in " + templ[0])
+        cmd("sed -i -r 's/v[0-9]+\.[0-9]+\.[0-9]+/"+ ver_str +"/' " + templ[0])
+    
+    if os.path.exists("library.json"):  
+        print("Updating version in library.json")
+        cmd("sed -i -r 's/[0-9]+\.[0-9]+\.[0-9]+/"+ ver_str[1:] +"/' library.json")
+        
+    if path.exists("library.properties"):  
+        print("Updating version in library.properties")
+        cmd("sed -i -r 's/version=[0-9]+\.[0-9]+\.[0-9]+/"+ "version=" + ver_str[1:] + "/' library.properties")
+    
+def lvgl_prepare():
+    print("Prepare lvgl")
+    
+    global ver_str, ver_major, ver_minor, ver_patch 
+    
+    os.chdir("./lvgl")
+    define_set("./lvgl.h", "LVGL_VERSION_INFO", '\"\"')
+    
+    # Run some scripts
+    os.chdir("./scripts")
+    cmd("./code-format.sh")
+    cmd("./lv_conf_checker.py")
+    cmd("doxygen")
+    os.chdir("../")
 
-    r = re.search(r'^release = ', i)
+    update_version()
-    if r: 
-      i = "version = '" + v + "'"
-       
-    outbuf += i + '\n'
-   
-  f.close()
 
-  f = open("./conf.py", "w")
+    #update CHANGLELOG
-      
+    new_content = ""
-  f.write(outbuf)
+    f = open("./CHANGELOG.md", "r")
-  f.close()
+    
-  cmd("git add conf.py")
+    global release_note
-  cmd('git ci -m "update conf.py to ' + v + '"')
+    release_note = ""
+    note_state = 0  
+    for i in f.read().splitlines():
+        if note_state == 0:
+            r = re.search(r'^## ' + ver_str, i)
+            if r: 
+                i = i.replace("planned on ", "") 
+                note_state+=1
+                
+        elif note_state == 1: 
+            r = re.search(r'^## ', i)
+            if r:
+                note_state+=1
+            else:
+                release_note += i + '\n'
+                    
+        new_content += i + '\n'
+     
+    f.close()
+    
+    f = open("./CHANGELOG.md", "w")
+    f.write(new_content)
+    f.close()
+    
+    cmd('git commit -am "prepare to release ' + ver_str + '"')
+    
+    os.chdir("../")
+    
+    
+def lv_examples_prepare():
+    print("Prepare lv_examples")
+    global ver_str, ver_major, ver_minor, ver_patch 
+    
+    os.chdir("./lv_examples")
+    
+    update_version()
+    
+    cmd("sed -i -r 's/LV_VERSION_CHECK\([0-9]+, *[0-9]+, *[0-9]+\)/"+ "LV_VERSION_CHECK(" + ver_major + ", " + ver_minor + ", " + ver_patch + ")/' lv_examples.h")
+    
+    cmd('git commit -am "prepare to release ' + ver_str + '"')
+    
+    os.chdir("../")
+    
+def lv_drivers_prepare():
+    print("Prepare lv_drivers")
+    global ver_str, ver_major, ver_minor, ver_patch 
+    
+    os.chdir("./lv_drivers")
+    
+    update_version()
+    
+    cmd('git commit -am "prepare to release ' + ver_str + '"')
+    
+    os.chdir("../")
+    
+def docs_prepare():
+    print("Prepare docs")
+    global ver_str, ver_major, ver_minor, ver_patch 
+    
+    os.chdir("./docs")
+    
+    cmd("git co latest --") 
+    cmd("rm -rf xml");  
+    cmd("cp -r ../lvgl/docs/api_doc/xml .");  
+    cmd("git add xml");
+    
+    cmd("sed -i -r \"s/'v[0-9]+\.[0-9]+\.[0-9]+.*'/\'" + ver_str + "'/\" conf.py")   
+    
+    cmd('git commit -am "prepare to release ' + ver_str + '"')
+    
+    os.chdir("../")
+    
+def blog_add_post():
+    global ver_str, release_note
+    
+    os.chdir("./blog/_posts")
+    
+    post = "---\nlayout: post\ntitle: " + ver_str + " is released\nauthor: \"kisvegabor\"\ncover: /assets/release_cover.png\n---\n\n"
+    post += release_note
+    
+    today = date.today()
+    d = today.strftime("%Y-%m-%d")
+    
+    f = open(d + "-release_" + ver_str + ".md", "w")
+    f.write(post)
+    f.close()
+    
+    cmd("git add .")
+    cmd("git commit -am 'Add " + ver_str + " release post'")
+    
+    os.chdir("../../")
+        
+def add_tags():
+    global ver_str
+    tag_cmd = " git tag -a " + ver_str + " -m 'Release " + ver_str + "' " 
+    cmd("cd lvgl; " + tag_cmd)    
+    cmd("cd lv_examples; " + tag_cmd)    
+    cmd("cd lv_drivers; " + tag_cmd)    
+    cmd("cd docs; " + tag_cmd)    
+    
+def update_release_branches():
+    global release_br
+    merge_cmd = " git checkout " + release_br + "; git pull origin " + release_br + "; git merge master  -X ours; git push origin " + release_br + "; git checkout master" 
+    cmd("cd lvgl; " + merge_cmd)    
+    cmd("cd lv_examples; " + merge_cmd)    
+    cmd("cd lv_drivers; " + merge_cmd)    
+    
+    merge_cmd = " git checkout " + release_br + "; git pull origin " + release_br  + "; git merge latest  -X ours; git push origin " + release_br + "; git checkout latest" 
+    cmd("cd docs; " + merge_cmd)
+    
+def publish_master():   
+    pub_cmd = "git push origin master; git push origin " + ver_str
+    cmd("cd lvgl; " + pub_cmd)    
+    cmd("cd lv_examples; " + pub_cmd)    
+    cmd("cd lv_drivers; " + pub_cmd)    
+
+    pub_cmd = "git push origin latest; git push origin " + ver_str
+    cmd("cd docs; " + pub_cmd)    
+    cmd("cd docs; git checkout master; ./update.py " + release_br)
+    
+    pub_cmd = "git push origin master"
+    cmd("cd blog; " + pub_cmd)    
+    
+    
+def merge_to_dev():
+    merge_cmd = "git checkout dev; git pull origin dev; git merge master -X ours; git checkout master"
+    cmd("cd lvgl; " + merge_cmd)    
+    
+    merge_cmd = "git checkout dev --;  git pull origin dev; git merge latest -X ours; git checkout master"
+    cmd("cd docs; " + merge_cmd)    
+    
+    
+def merge_from_dev():
+    merge_cmd = "git checkout master; git merge dev;"
+    cmd("cd lvgl; " + merge_cmd)    
+    
+    merge_cmd = "git checkout latest -- ; git merge dev;"
+    cmd("cd docs; " + merge_cmd)    
+        
+
+def lvgl_update_master_version():
+    global ver_major, ver_minor, ver_patch, ver_str
+    
+    os.chdir("./lvgl")
+
+    cmd("git checkout master")
+    define_set("./lvgl.h", "LVGL_VERSION_MAJOR", ver_major)
+    define_set("./lvgl.h", "LVGL_VERSION_MINOR", ver_minor)
+    define_set("./lvgl.h", "LVGL_VERSION_PATCH", ver_patch)
+    define_set("./lvgl.h", "LVGL_VERSION_INFO", "dev")
+    
+    templ = fnmatch.filter(os.listdir('.'), '*templ*')
+    if templ[0]:    
+        print("Updating version in " + templ[0])
+        cmd("sed -i -r 's/v[0-9]+\.[0-9]+\.[0-9]+/"+ ver_str +"/' " + templ[0])
+    
+    
+    cmd("git commit -am 'Update version'")
+    
+    os.chdir("../")
+
+def docs_update_latest_version():
+    global ver_str
+    
+    os.chdir("./docs")
+    cmd("git checkout latest --")
+    cmd("sed -i -r \"s/'v[0-9]+\.[0-9]+\.[0-9]+.*'/\'" + ver_str + "'/\" conf.py")   
+    cmd("git commit -am 'Update version'")
+    cmd("git checkout master --")
+    
+    os.chdir("../")
+        
+        
+def lvgl_update_dev_version():
+    global ver_major, ver_minor, ver_patch, dev_ver_str
+    
+    os.chdir("./lvgl")
+
+    cmd("git checkout dev")
+    define_set("./lvgl.h", "LVGL_VERSION_MAJOR", ver_major)
+    define_set("./lvgl.h", "LVGL_VERSION_MINOR", ver_minor)
+    define_set("./lvgl.h", "LVGL_VERSION_PATCH", ver_patch)
+    define_set("./lvgl.h", "LVGL_VERSION_INFO", "\"dev\"")
+    
+    templ = fnmatch.filter(os.listdir('.'), '*templ*')
+    if templ[0]:    
+        print("Updating version in " + templ[0])
+        cmd("sed -i -r 's/v[0-9]+\.[0-9]+\.[0-9]+/"+ dev_ver_str +"/' " + templ[0])
+    
+    
+    cmd("git commit -am 'Update dev version'")
+    cmd("git checkout master")
+    
+    os.chdir("../")
+
+def docs_update_dev_version():
+    global dev_ver_str
+    
+    os.chdir("./docs")
+    cmd("git checkout dev --")
+    cmd("sed -i -r \"s/'v[0-9]+\.[0-9]+\.[0-9]+.*'/\'" + dev_ver_str + "'/\" conf.py")   
+    cmd("git commit -am 'Update dev version'")
+    cmd("git checkout master --")
+    
+    os.chdir("../")
 
 
-def docs_merge_to_release_branch(v):
+def publish_dev_and_master():   
-  title("docs: merge to release branch")
+    pub_cmd = "git checkout dev; git push origin dev"
-  cmd('git co release/v7 --')
+    cmd("cd lvgl; " + pub_cmd)    
-  cmd('git clean -fd .')
+    pub_cmd = "git checkout master; git push origin master"
-  cmd('rm -f LVGL.pdf')	#To avoide possible merge conflict
+    cmd("cd lvgl; " + pub_cmd)    
-  cmd('git merge latest')
-  cmd('git push origin release/v7')
 
-def docs_build():
+    cmd("cd docs; git checkout master; ./update.py latest dev")
-  title("docs: Build")
-  cmd("git checkout master")
-  cmd("./update.py latest release/v7")
-  
-def clean_up():
-  title("Clean up repos")
-  os.chdir("../")
-  cmd("rm -rf lvgl docs lv_examples lv_drivers")
 
-lvgl_clone()
+def cleanup():
-lvgl_format()
+    os.chdir("../")
-lvgl_update_api_docs()
+    cmd("rm -fr " + workdir)
-ver_str = lvgl_update_version()    
-lvgl_update_library_json(ver_str)  
-lvgl_update_lv_conf_templ(ver_str)
-lvgl_commit_push(ver_str)
-lvgl_merge_to_release_branch(ver_str)
 
-examples_clone()
+if __name__ == '__main__':
-examples_commit_push(ver_str)
+    if(len(sys.argv) != 2):
-examples_merge_to_release_branch(ver_str)
+        print("Argument error. Usage ./release.py bugfix | minor | major") 
+        exit(1)
+        
+    dev_prepare = sys.argv[1]
+    if not (dev_prepare in prepare_type): 
+        print("Invalid argument. Usage ./release.py bugfix | minor | major") 
+        exit(1)
+        
+    clone_repos()
+    get_lvgl_version("master")
+    lvgl_prepare()
+    lv_examples_prepare() 
+    lv_drivers_prepare()
+    docs_prepare()
+    blog_add_post()
+    add_tags()
+    update_release_branches()
+    publish_master()
+ 
+    if dev_prepare == 'bugfix': 
+        ver_patch = str(int(ver_patch) + 1)
+        ver_str = "v" + ver_major + "." + ver_minor + "." + ver_patch + "-dev"    
 
-drivers_clone()
+        print("Prepare bugfix version " + ver_str)
-drivers_commit_push(ver_str)
-drivers_merge_to_release_branch(ver_str)
 
-docs_clone()
+        lvgl_update_master_version()
-docs_get_api()
+        docs_update_latest_version()
-docs_update_version(ver_str)
-docs_merge_to_release_branch(ver_str)
-docs_build()    
 
-clean_up()
+        get_lvgl_version("dev")
+        dev_ver_str = "v" + ver_major + "." + ver_minor + "." + ver_patch + "-dev"
+        merge_to_dev()
+        
+        lvgl_update_dev_version()
+        docs_update_dev_version()
+        publish_dev()
+    else:
+        get_lvgl_version("dev")
+        if dev_prepare == 'minor': 
+            ver_minor = str(int(ver_minor) + 1)
+            ver_patch = "0"
+        else:
+            ver_major = str(int(ver_major) + 1)
+            ver_minor = "0"
+            ver_patch = "0"
+                
+        dev_ver_str = "v" + ver_major + "." + ver_minor + "." + ver_patch + "-dev"
+        
+        print("Prepare minor version " + ver_str)
+
+        merge_to_dev()
+        merge_from_dev()
+
+        lvgl_update_dev_version()
+        docs_update_dev_version()
+        publish_dev_and_master()
+        
+    cleanup()
+    

src/lv_api_map.h

@@ -200,8 +200,31 @@ static inline void lv_chart_set_range(lv_obj_t * chart, lv_coord_t ymin, lv_coor
 {
     lv_chart_set_y_range(chart, LV_CHART_AXIS_PRIMARY_Y, ymin,  ymax);
 }
+
+
+static inline void lv_chart_clear_serie(lv_obj_t * chart, lv_chart_series_t * series)
+{
+    lv_chart_clear_series(chart, series);
+}
+
 #endif
 
+static inline void lv_obj_align_origo(lv_obj_t * obj, const lv_obj_t * base, lv_align_t align, lv_coord_t x_ofs,
+                                      lv_coord_t y_ofs)
+{
+    lv_obj_align_mid(obj, base, align, x_ofs, y_ofs);
+}
+
+static inline void lv_obj_align_origo_x(lv_obj_t * obj, const lv_obj_t * base, lv_align_t align, lv_coord_t x_ofs)
+{
+    lv_obj_align_mid_y(obj, base, align, x_ofs);
+}
+
+static inline void lv_obj_align_origo_y(lv_obj_t * obj, const lv_obj_t * base, lv_align_t align, lv_coord_t y_ofs)
+{
+    lv_obj_align_mid_y(obj, base, align, y_ofs);
+}
+
 #endif /*LV_USE_API_EXTENSION_V6*/
 /**********************
  *      MACROS

src/lv_conf_internal.h

@@ -1047,6 +1047,10 @@ e.g. "stm32f769xx.h" or "stm32f429xx.h" */
 #endif
 #endif
 
+/*Rotary (dependencies: lv_arc, lv_btn)*/
+#ifndef LV_USE_ROTARY
+#define LV_USE_ROTARY    1
+#endif
 /*Slider (dependencies: lv_bar)*/
 #ifndef LV_USE_SLIDER
 #define LV_USE_SLIDER    1

src/lv_core/lv_disp.h

@@ -209,7 +209,7 @@ static inline void lv_scr_load(lv_obj_t * scr)
  * 1 dip is 2 px on a 320 DPI screen
  * https://stackoverflow.com/questions/2025282/what-is-the-difference-between-px-dip-dp-and-sp
  */
-#define LV_DPX(n)   LV_MATH_MAX((( lv_disp_get_dpi(NULL) * (n) + 80) / 160), 1) /*+80 for rounding*/
+#define LV_DPX(n)   (n == 0 ? 0 :LV_MATH_MAX((( lv_disp_get_dpi(NULL) * (n) + 80) / 160), 1)) /*+80 for rounding*/
 
 static inline lv_coord_t lv_dpx(lv_coord_t n)
 {

src/lv_core/lv_indev.c

@@ -1490,7 +1490,6 @@ static lv_obj_t * get_dragged_obj(lv_obj_t * obj)
 static void indev_gesture(lv_indev_proc_t * proc)
 {
 
-    if(proc->types.pointer.drag_in_prog) return;
     if(proc->types.pointer.gesture_sent) return;
 
     lv_obj_t * gesture_obj = proc->types.pointer.act_obj;

src/lv_core/lv_obj.c

@@ -87,8 +87,8 @@ static void refresh_children_style(lv_obj_t * obj);
 static void base_dir_refr_children(lv_obj_t * obj);
 static void obj_align_core(lv_obj_t * obj, const lv_obj_t * base, lv_align_t align, bool x_set, bool y_set,
                            lv_coord_t x_ofs, lv_coord_t y_ofs);
-static void obj_align_origo_core(lv_obj_t * obj, const lv_obj_t * base, lv_align_t align,  bool x_set, bool y_set,
+static void obj_align_mid_core(lv_obj_t * obj, const lv_obj_t * base, lv_align_t align,  bool x_set, bool y_set,
-                                 lv_coord_t x_ofs, lv_coord_t y_ofs);
+                               lv_coord_t x_ofs, lv_coord_t y_ofs);
 #if LV_USE_ANIMATION
 static lv_style_trans_t * trans_create(lv_obj_t * obj, lv_style_property_t prop, uint8_t part, lv_state_t prev_state,
                                        lv_state_t new_state);
@@ -103,7 +103,9 @@ static void lv_event_mark_deleted(lv_obj_t * obj);
 static bool obj_valid_child(const lv_obj_t * parent, const lv_obj_t * obj_to_find);
 static void lv_obj_del_async_cb(void * obj);
 static void obj_del_core(lv_obj_t * obj);
-
+static void update_style_cache(lv_obj_t * obj, uint8_t part, uint16_t prop);
+static void update_style_cache_children(lv_obj_t * obj);
+static void invalidate_style_cache(lv_obj_t * obj, uint8_t part, lv_style_property_t prop);
 /**********************
  *  STATIC VARIABLES
  **********************/
@@ -503,43 +505,11 @@ void lv_obj_invalidate_area(const lv_obj_t * obj, const lv_area_t * area)
 {
     LV_ASSERT_OBJ(obj, LV_OBJX_NAME);
 
-    if(lv_obj_get_hidden(obj)) return;
+    lv_area_t area_tmp;
+    lv_area_copy(&area_tmp, area);
+    bool visible = lv_obj_area_is_visible(obj, &area_tmp);
 
-    /*Invalidate the object only if it belongs to the curent or previous'*/
+    if(visible) _lv_inv_area(lv_obj_get_disp(obj), &area_tmp);
-    lv_obj_t * obj_scr = lv_obj_get_screen(obj);
-    lv_disp_t * disp   = lv_obj_get_disp(obj_scr);
-    if(obj_scr == lv_disp_get_scr_act(disp) ||
-       obj_scr == lv_disp_get_scr_prev(disp) ||
-       obj_scr == lv_disp_get_layer_top(disp) ||
-       obj_scr == lv_disp_get_layer_sys(disp)) {
-
-        /*Truncate the area to the object*/
-        lv_area_t obj_coords;
-        lv_coord_t ext_size = obj->ext_draw_pad;
-        lv_area_copy(&obj_coords, &obj->coords);
-        obj_coords.x1 -= ext_size;
-        obj_coords.y1 -= ext_size;
-        obj_coords.x2 += ext_size;
-        obj_coords.y2 += ext_size;
-
-        bool is_common;
-        lv_area_t area_trunc;
-
-        is_common = _lv_area_intersect(&area_trunc, area, &obj_coords);
-        if(is_common == false) return;  /*The area is not on the object*/
-
-        /*Truncate recursively to the parents*/
-        lv_obj_t * par = lv_obj_get_parent(obj);
-        while(par != NULL) {
-            is_common = _lv_area_intersect(&area_trunc, &area_trunc, &par->coords);
-            if(is_common == false) break;       /*If no common parts with parent break;*/
-            if(lv_obj_get_hidden(par)) return; /*If the parent is hidden then the child is hidden and won't be drawn*/
-
-            par = lv_obj_get_parent(par);
-        }
-
-        if(is_common) _lv_inv_area(disp, &area_trunc);
-    }
 }
 
 /**
@@ -562,6 +532,74 @@ void lv_obj_invalidate(const lv_obj_t * obj)
     lv_obj_invalidate_area(obj, &obj_coords);
 
 }
+
+/**
+ * Tell whether an area of an object is visible (even partially) now or not
+ * @param obj pointer to an object
+ * @param area the are to check. The visible part of the area will be written back here.
+ * @return true: visible; false: not visible (hidden, out of parent, on other screen, etc)
+ */
+bool lv_obj_area_is_visible(const lv_obj_t * obj, lv_area_t * area)
+{
+    if(lv_obj_get_hidden(obj)) return false;
+
+    /*Invalidate the object only if it belongs to the curent or previous'*/
+    lv_obj_t * obj_scr = lv_obj_get_screen(obj);
+    lv_disp_t * disp   = lv_obj_get_disp(obj_scr);
+    if(obj_scr == lv_disp_get_scr_act(disp) ||
+       obj_scr == lv_disp_get_scr_prev(disp) ||
+       obj_scr == lv_disp_get_layer_top(disp) ||
+       obj_scr == lv_disp_get_layer_sys(disp)) {
+
+        /*Truncate the area to the object*/
+        lv_area_t obj_coords;
+        lv_coord_t ext_size = obj->ext_draw_pad;
+        lv_area_copy(&obj_coords, &obj->coords);
+        obj_coords.x1 -= ext_size;
+        obj_coords.y1 -= ext_size;
+        obj_coords.x2 += ext_size;
+        obj_coords.y2 += ext_size;
+
+        bool is_common;
+
+        is_common = _lv_area_intersect(area, area, &obj_coords);
+        if(is_common == false) return false;  /*The area is not on the object*/
+
+        /*Truncate recursively to the parents*/
+        lv_obj_t * par = lv_obj_get_parent(obj);
+        while(par != NULL) {
+            is_common = _lv_area_intersect(area, area, &par->coords);
+            if(is_common == false) return false;       /*If no common parts with parent break;*/
+            if(lv_obj_get_hidden(par)) return false; /*If the parent is hidden then the child is hidden and won't be drawn*/
+
+            par = lv_obj_get_parent(par);
+        }
+    }
+
+    return true;
+}
+
+/**
+ * Tell whether an object is visible (even partially) now or not
+ * @param obj pointer to an object
+ * @return true: visible; false: not visible (hidden, out of parent, on other screen, etc)
+ */
+bool lv_obj_is_visible(const lv_obj_t * obj)
+{
+    LV_ASSERT_OBJ(obj, LV_OBJX_NAME);
+
+    lv_area_t obj_coords;
+    lv_coord_t ext_size = obj->ext_draw_pad;
+    lv_area_copy(&obj_coords, &obj->coords);
+    obj_coords.x1 -= ext_size;
+    obj_coords.y1 -= ext_size;
+    obj_coords.x2 += ext_size;
+    obj_coords.y2 += ext_size;
+
+    return lv_obj_area_is_visible(obj, &obj_coords);
+
+}
+
 /*=====================
  * Setter functions
  *====================*/
@@ -856,7 +894,7 @@ void lv_obj_set_height_fit(lv_obj_t * obj, lv_coord_t h)
     lv_style_int_t ptop = lv_obj_get_style_pad_top(obj, LV_OBJ_PART_MAIN);
     lv_style_int_t pbottom = lv_obj_get_style_pad_bottom(obj, LV_OBJ_PART_MAIN);
 
-    lv_obj_set_width(obj, h - ptop - pbottom);
+    lv_obj_set_height(obj, h - ptop - pbottom);
 }
 
 /**
@@ -911,7 +949,7 @@ void lv_obj_align(lv_obj_t * obj, const lv_obj_t * base, lv_align_t align, lv_co
     obj->realign.xofs        = x_ofs;
     obj->realign.yofs        = y_ofs;
     obj->realign.base        = base;
-    obj->realign.origo_align = 0;
+    obj->realign.mid_align = 0;
 #endif
 }
 
@@ -959,7 +997,7 @@ void lv_obj_align_y(lv_obj_t * obj, const lv_obj_t * base, lv_align_t align, lv_
  * @param x_ofs x coordinate offset after alignment
  * @param y_ofs y coordinate offset after alignment
  */
-void lv_obj_align_origo(lv_obj_t * obj, const lv_obj_t * base, lv_align_t align, lv_coord_t x_ofs, lv_coord_t y_ofs)
+void lv_obj_align_mid(lv_obj_t * obj, const lv_obj_t * base, lv_align_t align, lv_coord_t x_ofs, lv_coord_t y_ofs)
 {
     LV_ASSERT_OBJ(obj, LV_OBJX_NAME);
 
@@ -970,7 +1008,7 @@ void lv_obj_align_origo(lv_obj_t * obj, const lv_obj_t * base, lv_align_t align,
     LV_ASSERT_OBJ(base, LV_OBJX_NAME);
 
 
-    obj_align_origo_core(obj, base, align, true, true, x_ofs, y_ofs);
+    obj_align_mid_core(obj, base, align, true, true, x_ofs, y_ofs);
 
 #if LV_USE_OBJ_REALIGN
     /*Save the last align parameters to use them in `lv_obj_realign`*/
@@ -978,7 +1016,7 @@ void lv_obj_align_origo(lv_obj_t * obj, const lv_obj_t * base, lv_align_t align,
     obj->realign.xofs        = x_ofs;
     obj->realign.yofs        = y_ofs;
     obj->realign.base        = base;
-    obj->realign.origo_align = 1;
+    obj->realign.mid_align = 1;
 #endif
 }
 
@@ -989,7 +1027,7 @@ void lv_obj_align_origo(lv_obj_t * obj, const lv_obj_t * base, lv_align_t align,
  * @param align type of alignment (see 'lv_align_t' enum)
  * @param x_ofs x coordinate offset after alignment
  */
-void lv_obj_align_origo_x(lv_obj_t * obj, const lv_obj_t * base, lv_align_t align, lv_coord_t x_ofs)
+void lv_obj_align_mid_x(lv_obj_t * obj, const lv_obj_t * base, lv_align_t align, lv_coord_t x_ofs)
 {
     LV_ASSERT_OBJ(obj, LV_OBJX_NAME);
 
@@ -1000,7 +1038,7 @@ void lv_obj_align_origo_x(lv_obj_t * obj, const lv_obj_t * base, lv_align_t alig
     LV_ASSERT_OBJ(base, LV_OBJX_NAME);
 
 
-    obj_align_origo_core(obj, base, align, true, false, x_ofs, 0);
+    obj_align_mid_core(obj, base, align, true, false, x_ofs, 0);
 }
 
 
@@ -1011,7 +1049,7 @@ void lv_obj_align_origo_x(lv_obj_t * obj, const lv_obj_t * base, lv_align_t alig
  * @param align type of alignment (see 'lv_align_t' enum)
  * @param y_ofs y coordinate offset after alignment
  */
-void lv_obj_align_origo_y(lv_obj_t * obj, const lv_obj_t * base, lv_align_t align, lv_coord_t y_ofs)
+void lv_obj_align_mid_y(lv_obj_t * obj, const lv_obj_t * base, lv_align_t align, lv_coord_t y_ofs)
 {
     LV_ASSERT_OBJ(obj, LV_OBJX_NAME);
 
@@ -1022,7 +1060,7 @@ void lv_obj_align_origo_y(lv_obj_t * obj, const lv_obj_t * base, lv_align_t alig
     LV_ASSERT_OBJ(base, LV_OBJX_NAME);
 
 
-    obj_align_origo_core(obj, base, align, true, false, 0, y_ofs);
+    obj_align_mid_core(obj, base, align, true, false, 0, y_ofs);
 }
 
 /**
@@ -1034,8 +1072,8 @@ void lv_obj_realign(lv_obj_t * obj)
     LV_ASSERT_OBJ(obj, LV_OBJX_NAME);
 
 #if LV_USE_OBJ_REALIGN
-    if(obj->realign.origo_align)
+    if(obj->realign.mid_align)
-        lv_obj_align_origo(obj, obj->realign.base, obj->realign.align, obj->realign.xofs, obj->realign.yofs);
+        lv_obj_align_mid(obj, obj->realign.base, obj->realign.align, obj->realign.xofs, obj->realign.yofs);
     else
         lv_obj_align(obj, obj->realign.base, obj->realign.align, obj->realign.xofs, obj->realign.yofs);
 #else
@@ -1120,7 +1158,7 @@ void lv_obj_add_style(lv_obj_t * obj, uint8_t part, lv_style_t * style)
 #if LV_USE_ANIMATION
     trans_del(obj, part, 0xFF, NULL);
 #endif
-    lv_obj_refresh_style(obj, LV_STYLE_PROP_ALL);
+    lv_obj_refresh_style(obj, part, LV_STYLE_PROP_ALL);
 }
 
 /**
@@ -1144,7 +1182,7 @@ void lv_obj_remove_style(lv_obj_t * obj, uint8_t part, lv_style_t * style)
 #if LV_USE_ANIMATION
     trans_del(obj, part, 0xFF, NULL);
 #endif
-    lv_obj_refresh_style(obj, LV_STYLE_PROP_ALL);
+    lv_obj_refresh_style(obj, part, LV_STYLE_PROP_ALL);
 }
 
 /**
@@ -1181,7 +1219,7 @@ void lv_obj_reset_style_list(lv_obj_t * obj, uint8_t part)
 {
     lv_obj_clean_style_list(obj, part);
 
-    lv_obj_refresh_style(obj, LV_STYLE_PROP_ALL);
+    lv_obj_refresh_style(obj, part, LV_STYLE_PROP_ALL);
 }
 
 /**
@@ -1203,7 +1241,7 @@ void _lv_obj_set_style_local_int(lv_obj_t * obj, uint8_t part, lv_style_property
 #if LV_USE_ANIMATION
     trans_del(obj, part, prop, NULL);
 #endif
-    lv_obj_refresh_style(obj, prop & (~LV_STYLE_STATE_MASK));
+    lv_obj_refresh_style(obj, part, prop & (~LV_STYLE_STATE_MASK));
 }
 
 /**
@@ -1225,7 +1263,7 @@ void _lv_obj_set_style_local_color(lv_obj_t * obj, uint8_t part, lv_style_proper
 #if LV_USE_ANIMATION
     trans_del(obj, part, prop, NULL);
 #endif
-    lv_obj_refresh_style(obj, prop & (~LV_STYLE_STATE_MASK));
+    lv_obj_refresh_style(obj, part, prop & (~LV_STYLE_STATE_MASK));
 }
 
 /**
@@ -1247,7 +1285,7 @@ void _lv_obj_set_style_local_opa(lv_obj_t * obj, uint8_t part, lv_style_property
 #if LV_USE_ANIMATION
     trans_del(obj, part, prop, NULL);
 #endif
-    lv_obj_refresh_style(obj, prop & (~LV_STYLE_STATE_MASK));
+    lv_obj_refresh_style(obj, part, prop & (~LV_STYLE_STATE_MASK));
 }
 
 /**
@@ -1269,7 +1307,7 @@ void _lv_obj_set_style_local_ptr(lv_obj_t * obj, uint8_t part, lv_style_property
 #if LV_USE_ANIMATION
     trans_del(obj, part, prop, NULL);
 #endif
-    lv_obj_refresh_style(obj, prop & (~LV_STYLE_STATE_MASK));
+    lv_obj_refresh_style(obj, part, prop & (~LV_STYLE_STATE_MASK));
 }
 
 /**
@@ -1294,12 +1332,15 @@ bool lv_obj_remove_style_local_prop(lv_obj_t * obj, uint8_t part, lv_style_prope
 /**
  * Notify an object (and its children) about its style is modified
  * @param obj pointer to an object
+ * @param part the part of the object which style property should be refreshed.
  * @param prop `LV_STYLE_PROP_ALL` or an `LV_STYLE_...` property. It is used to optimize what needs to be refreshed.
  */
-void lv_obj_refresh_style(lv_obj_t * obj, lv_style_property_t prop)
+void lv_obj_refresh_style(lv_obj_t * obj, uint8_t part, lv_style_property_t prop)
 {
     LV_ASSERT_OBJ(obj, LV_OBJX_NAME);
 
+    invalidate_style_cache(obj, part, prop);
+
     /*If a real style refresh is required*/
     bool real_refr = false;
     switch(prop) {
@@ -1387,6 +1428,26 @@ void lv_obj_report_style_mod(lv_style_t * style)
     }
 }
 
+/**
+ * Enable/disable the use of style cahche for an object
+ * @param obj pointer to an object
+ * @param dis true: disable; false: enable (re-enable)
+ */
+void _lv_obj_disable_style_caching(lv_obj_t * obj, bool dis)
+{
+    uint8_t part;
+    for(part = 0; part < _LV_OBJ_PART_REAL_FIRST; part++) {
+        lv_style_list_t * list = lv_obj_get_style_list(obj, part);
+        if(list == NULL) break;
+        list->ignore_cache = dis;
+    }
+    for(part = _LV_OBJ_PART_REAL_FIRST; part < 0xFF; part++) {
+           lv_style_list_t * list = lv_obj_get_style_list(obj, part);
+           if(list == NULL) break;
+           list->ignore_cache = dis;
+       }
+}
+
 /*-----------------
  * Attribute set
  *----------------*/
@@ -1609,7 +1670,7 @@ void lv_obj_set_state(lv_obj_t * obj, lv_state_t new_state)
 
 #if LV_USE_ANIMATION == 0
     obj->state = new_state;
-    lv_obj_refresh_style(obj, LV_STYLE_PROP_ALL);
+    lv_obj_refresh_style(obj, LV_OBJ_PART_ALL, LV_STYLE_PROP_ALL);
 #else
     lv_state_t prev_state = obj->state;
     obj->state = new_state;
@@ -1660,10 +1721,10 @@ void lv_obj_set_state(lv_obj_t * obj, lv_state_t new_state)
 
             }
         }
+        lv_obj_refresh_style(obj, part, LV_STYLE_PROP_ALL);
     }
 #endif
 
-    lv_obj_refresh_style(obj, LV_STYLE_PROP_ALL);
 
 }
 
@@ -2449,12 +2510,74 @@ lv_style_int_t _lv_obj_get_style_int(const lv_obj_t * obj, uint8_t part, lv_styl
     lv_res_t res = LV_RES_INV;
     const lv_obj_t * parent = obj;
     while(parent) {
-        lv_style_list_t * dsc = lv_obj_get_style_list(parent, part);
+        lv_style_list_t * list = lv_obj_get_style_list(parent, part);
+        if(!list->ignore_cache && list->style_cnt > 0) {
+            if(!list->valid_cache) update_style_cache((lv_obj_t*)parent, part, prop  & (~LV_STYLE_STATE_MASK));
+
+            bool def = false;
+            switch(prop  & (~LV_STYLE_STATE_MASK)) {
+            case LV_STYLE_BG_GRAD_DIR:
+                if(list->bg_grad_dir_none) def = true;
+                break;
+            case LV_STYLE_CLIP_CORNER:
+                if(list->clip_corner_off) def = true;
+                break;
+            case LV_STYLE_TEXT_LETTER_SPACE:
+            case LV_STYLE_TEXT_LINE_SPACE:
+                if(list->text_space_zero) def = true;
+                break;
+            case LV_STYLE_TRANSFORM_ANGLE:
+            case LV_STYLE_TRANSFORM_WIDTH:
+            case LV_STYLE_TRANSFORM_HEIGHT:
+            case LV_STYLE_TRANSFORM_ZOOM:
+                if(list->transform_all_zero) def = true;
+                break;
+            case LV_STYLE_BORDER_WIDTH:
+                if(list->border_width_zero) def = true;
+                break;
+            case LV_STYLE_BORDER_SIDE:
+                if(list->border_side_full) def = true;
+                break;
+            case LV_STYLE_BORDER_POST:
+                if(list->border_post_off) def = true;
+                break;
+            case LV_STYLE_OUTLINE_WIDTH:
+                if(list->outline_width_zero) def = true;
+                break;
+            case LV_STYLE_RADIUS:
+                if(list->radius_zero) def = true;
+                break;
+            case LV_STYLE_SHADOW_WIDTH:
+                if(list->shadow_width_zero) def = true;
+                break;
+            case LV_STYLE_PAD_TOP:
+            case LV_STYLE_PAD_BOTTOM:
+            case LV_STYLE_PAD_LEFT:
+            case LV_STYLE_PAD_RIGHT:
+                if(list->pad_all_zero) def = true;
+                break;
+            case LV_STYLE_BG_BLEND_MODE:
+            case LV_STYLE_BORDER_BLEND_MODE:
+            case LV_STYLE_IMAGE_BLEND_MODE:
+            case LV_STYLE_LINE_BLEND_MODE:
+            case LV_STYLE_OUTLINE_BLEND_MODE:
+            case LV_STYLE_PATTERN_BLEND_MODE:
+            case LV_STYLE_SHADOW_BLEND_MODE:
+            case LV_STYLE_TEXT_BLEND_MODE:
+            case LV_STYLE_VALUE_BLEND_MODE:
+                if(list->blend_mode_all_normal) def = true;
+                break;
+            }
+
+            if(def) {
+                break;
+            }
+        }
 
         lv_state_t state = lv_obj_get_state(parent, part);
         prop = (uint16_t)prop_ori + ((uint16_t)state << LV_STYLE_STATE_POS);
 
-        res = _lv_style_list_get_int(dsc, prop, &value_act);
+        res = _lv_style_list_get_int(list, prop, &value_act);
         if(res == LV_RES_OK) return value_act;
 
         if(LV_STYLE_ATTR_GET_INHERIT(attr) == 0) break;
@@ -2512,12 +2635,12 @@ lv_color_t _lv_obj_get_style_color(const lv_obj_t * obj, uint8_t part, lv_style_
     lv_res_t res = LV_RES_INV;
     const lv_obj_t * parent = obj;
     while(parent) {
-        lv_style_list_t * dsc = lv_obj_get_style_list(parent, part);
+        lv_style_list_t * list = lv_obj_get_style_list(parent, part);
 
         lv_state_t state = lv_obj_get_state(parent, part);
         prop = (uint16_t)prop_ori + ((uint16_t)state << LV_STYLE_STATE_POS);
 
-        res = _lv_style_list_get_color(dsc, prop, &value_act);
+        res = _lv_style_list_get_color(list, prop, &value_act);
         if(res == LV_RES_OK) return value_act;
 
         if(LV_STYLE_ATTR_GET_INHERIT(attr) == 0) break;
@@ -2568,12 +2691,34 @@ lv_opa_t _lv_obj_get_style_opa(const lv_obj_t * obj, uint8_t part, lv_style_prop
     lv_res_t res = LV_RES_INV;
     const lv_obj_t * parent = obj;
     while(parent) {
-        lv_style_list_t * dsc = lv_obj_get_style_list(parent, part);
+        lv_style_list_t * list = lv_obj_get_style_list(parent, part);
+
+        if(!list->ignore_cache && list->style_cnt > 0) {
+            if(!list->valid_cache) update_style_cache((lv_obj_t*)parent, part, prop  & (~LV_STYLE_STATE_MASK));
+            bool def = false;
+            switch(prop & (~LV_STYLE_STATE_MASK)) {
+            case LV_STYLE_OPA_SCALE:
+                if(list->opa_scale_cover) def = true;
+                break;
+            case LV_STYLE_BG_OPA:
+                if(list->bg_opa_cover) return LV_OPA_COVER;     /*Special case, not the default value is used*/
+                if(list->bg_opa_transp) def = true;
+                break;
+            case LV_STYLE_IMAGE_RECOLOR_OPA:
+                if(list->img_recolor_opa_transp) def = true;
+                break;
+            }
+
+            if(def) {
+                break;
+            }
+        }
+
 
         lv_state_t state = lv_obj_get_state(parent, part);
         prop = (uint16_t)prop_ori + ((uint16_t)state << LV_STYLE_STATE_POS);
 
-        res = _lv_style_list_get_opa(dsc, prop, &value_act);
+        res = _lv_style_list_get_opa(list, prop, &value_act);
         if(res == LV_RES_OK) return value_act;
 
         if(LV_STYLE_ATTR_GET_INHERIT(attr) == 0) break;
@@ -2625,12 +2770,32 @@ const void * _lv_obj_get_style_ptr(const lv_obj_t * obj, uint8_t part, lv_style_
     lv_res_t res = LV_RES_INV;
     const lv_obj_t * parent = obj;
     while(parent) {
-        lv_style_list_t * dsc = lv_obj_get_style_list(parent, part);
+        lv_style_list_t * list = lv_obj_get_style_list(parent, part);
+
+        if(!list->ignore_cache && list->style_cnt > 0) {
+            if(!list->valid_cache) update_style_cache((lv_obj_t*)parent, part, prop  & (~LV_STYLE_STATE_MASK));
+            bool def = false;
+            switch(prop  & (~LV_STYLE_STATE_MASK)) {
+            case LV_STYLE_VALUE_STR:
+                if(list->value_txt_str) def = true;
+                break;
+            case LV_STYLE_PATTERN_IMAGE:
+                if(list->pattern_img_null) def = true;
+                break;
+            case LV_STYLE_TEXT_FONT:
+                if(list->text_font_normal) def = true;
+                break;
+            }
+
+            if(def) {
+                break;
+            }
+        }
 
         lv_state_t state = lv_obj_get_state(parent, part);
         prop = (uint16_t)prop_ori + ((uint16_t)state << LV_STYLE_STATE_POS);
 
-        res = _lv_style_list_get_ptr(dsc, prop, &value_act);
+        res = _lv_style_list_get_ptr(list, prop, &value_act);
         if(res == LV_RES_OK)  return value_act;
 
         if(LV_STYLE_ATTR_GET_INHERIT(attr) == 0) break;
@@ -3144,9 +3309,9 @@ void lv_obj_init_draw_rect_dsc(lv_obj_t * obj, uint8_t part, lv_draw_rect_dsc_t
         }
     }
 
-    if(draw_dsc->border_opa != LV_OPA_TRANSP) {
+    draw_dsc->border_width = lv_obj_get_style_border_width(obj, part);
-        draw_dsc->border_width = lv_obj_get_style_border_width(obj, part);
+    if(draw_dsc->border_width) {
-        if(draw_dsc->border_width) {
+        if(draw_dsc->border_opa != LV_OPA_TRANSP) {
             draw_dsc->border_opa = lv_obj_get_style_border_opa(obj, part);
             if(draw_dsc->border_opa > LV_OPA_MIN) {
                 draw_dsc->border_side = lv_obj_get_style_border_side(obj, part);
@@ -3159,9 +3324,9 @@ void lv_obj_init_draw_rect_dsc(lv_obj_t * obj, uint8_t part, lv_draw_rect_dsc_t
     }
 
 #if LV_USE_OUTLINE
-    if(draw_dsc->outline_opa != LV_OPA_TRANSP) {
+    draw_dsc->outline_width = lv_obj_get_style_outline_width(obj, part);
-        draw_dsc->outline_width = lv_obj_get_style_outline_width(obj, part);
+    if(draw_dsc->outline_width) {
-        if(draw_dsc->outline_width) {
+        if(draw_dsc->outline_opa != LV_OPA_TRANSP) {
             draw_dsc->outline_opa = lv_obj_get_style_outline_opa(obj, part);
             if(draw_dsc->outline_opa > LV_OPA_MIN) {
                 draw_dsc->outline_pad = lv_obj_get_style_outline_pad(obj, part);
@@ -3175,9 +3340,9 @@ void lv_obj_init_draw_rect_dsc(lv_obj_t * obj, uint8_t part, lv_draw_rect_dsc_t
 #endif
 
 #if LV_USE_PATTERN
-    if(draw_dsc->pattern_opa != LV_OPA_TRANSP) {
+    draw_dsc->pattern_image = lv_obj_get_style_pattern_image(obj, part);
-        draw_dsc->pattern_image = lv_obj_get_style_pattern_image(obj, part);
+    if(draw_dsc->pattern_image) {
-        if(draw_dsc->pattern_image) {
+        if(draw_dsc->pattern_opa != LV_OPA_TRANSP) {
             draw_dsc->pattern_opa = lv_obj_get_style_pattern_opa(obj, part);
             if(draw_dsc->pattern_opa > LV_OPA_MIN) {
                 draw_dsc->pattern_recolor_opa = lv_obj_get_style_pattern_recolor_opa(obj, part);
@@ -3198,9 +3363,9 @@ void lv_obj_init_draw_rect_dsc(lv_obj_t * obj, uint8_t part, lv_draw_rect_dsc_t
 #endif
 
 #if LV_USE_SHADOW
-    if(draw_dsc->shadow_opa > LV_OPA_MIN) {
+    draw_dsc->shadow_width = lv_obj_get_style_shadow_width(obj, part);
-        draw_dsc->shadow_width = lv_obj_get_style_shadow_width(obj, part);
+    if(draw_dsc->shadow_width) {
-        if(draw_dsc->shadow_width) {
+        if(draw_dsc->shadow_opa > LV_OPA_MIN) {
             draw_dsc->shadow_opa = lv_obj_get_style_shadow_opa(obj, part);
             if(draw_dsc->shadow_opa > LV_OPA_MIN) {
                 draw_dsc->shadow_ofs_x = lv_obj_get_style_shadow_ofs_x(obj, part);
@@ -3216,9 +3381,9 @@ void lv_obj_init_draw_rect_dsc(lv_obj_t * obj, uint8_t part, lv_draw_rect_dsc_t
 #endif
 
 #if LV_USE_VALUE_STR
-    if(draw_dsc->value_opa > LV_OPA_MIN) {
+    draw_dsc->value_str = lv_obj_get_style_value_str(obj, part);
-        draw_dsc->value_str = lv_obj_get_style_value_str(obj, part);
+    if(draw_dsc->value_str) {
-        if(draw_dsc->value_str) {
+        if(draw_dsc->value_opa > LV_OPA_MIN) {
             draw_dsc->value_opa = lv_obj_get_style_value_opa(obj, part);
             if(draw_dsc->value_opa > LV_OPA_MIN) {
                 draw_dsc->value_ofs_x = lv_obj_get_style_value_ofs_x(obj, part);
@@ -3308,6 +3473,9 @@ void lv_obj_init_draw_img_dsc(lv_obj_t * obj, uint8_t part, lv_draw_img_dsc_t *
 
 void lv_obj_init_draw_line_dsc(lv_obj_t * obj, uint8_t part, lv_draw_line_dsc_t * draw_dsc)
 {
+    draw_dsc->width = lv_obj_get_style_line_width(obj, part);
+    if(draw_dsc->width == 0) return;
+
     draw_dsc->opa = lv_obj_get_style_line_opa(obj, part);
     if(draw_dsc->opa <= LV_OPA_MIN)  return;
 
@@ -3319,9 +3487,6 @@ void lv_obj_init_draw_line_dsc(lv_obj_t * obj, uint8_t part, lv_draw_line_dsc_t
     if(draw_dsc->opa <= LV_OPA_MIN)  return;
 #endif
 
-    draw_dsc->width = lv_obj_get_style_line_width(obj, part);
-    if(draw_dsc->width == 0) return;
-
     draw_dsc->color = lv_obj_get_style_line_color(obj, part);
 
     draw_dsc->dash_width = lv_obj_get_style_line_dash_width(obj, part);
@@ -3637,7 +3802,7 @@ static lv_design_res_t lv_obj_design(lv_obj_t * obj, const lv_area_t * clip_area
         lv_draw_rect_dsc_init(&draw_dsc);
         /*If the border is drawn later disable loading its properties*/
         if(lv_obj_get_style_border_post(obj, LV_OBJ_PART_MAIN)) {
-            draw_dsc.border_opa = LV_OPA_TRANSP;
+            draw_dsc.border_post = 1;
         }
 
         lv_obj_init_draw_rect_dsc(obj, LV_OBJ_PART_MAIN, &draw_dsc);
@@ -3676,6 +3841,7 @@ static lv_design_res_t lv_obj_design(lv_obj_t * obj, const lv_area_t * clip_area
             draw_dsc.bg_opa = LV_OPA_TRANSP;
             draw_dsc.pattern_opa = LV_OPA_TRANSP;
             draw_dsc.shadow_opa = LV_OPA_TRANSP;
+            draw_dsc.value_opa = LV_OPA_TRANSP;
             lv_obj_init_draw_rect_dsc(obj, LV_OBJ_PART_MAIN, &draw_dsc);
 
             lv_coord_t w = lv_obj_get_style_transform_width(obj, LV_OBJ_PART_MAIN);
@@ -3816,16 +3982,16 @@ static void refresh_children_position(lv_obj_t * obj, lv_coord_t x_diff, lv_coor
  */
 static void report_style_mod_core(void * style, lv_obj_t * obj)
 {
-    uint8_t part_sub;
+    uint8_t part;
-    for(part_sub = 0; part_sub != _LV_OBJ_PART_REAL_LAST; part_sub++) {
+    for(part = 0; part != _LV_OBJ_PART_REAL_LAST; part++) {
-        lv_style_list_t * dsc = lv_obj_get_style_list(obj, part_sub);
+        lv_style_list_t * list = lv_obj_get_style_list(obj, part);
-        if(dsc == NULL) break;
+        if(list == NULL) break;
 
         uint8_t ci;
-        for(ci = 0; ci < dsc->style_cnt; ci++) {
+        for(ci = 0; ci < list->style_cnt; ci++) {
-            lv_style_t * class = lv_style_list_get_style(dsc, ci);
+            lv_style_t * class = lv_style_list_get_style(list, ci);
             if(class == style || style == NULL) {
-                lv_obj_refresh_style(obj, LV_STYLE_PROP_ALL);
+                lv_obj_refresh_style(obj, part, LV_STYLE_PROP_ALL);
                 break;
             }
         }
@@ -3892,8 +4058,8 @@ static void obj_align_core(lv_obj_t * obj, const lv_obj_t * base, lv_align_t ali
     else if(y_set) lv_obj_set_y(obj, new_pos.y);
 }
 
-static void obj_align_origo_core(lv_obj_t * obj, const lv_obj_t * base, lv_align_t align,  bool x_set, bool y_set,
+static void obj_align_mid_core(lv_obj_t * obj, const lv_obj_t * base, lv_align_t align,  bool x_set, bool y_set,
-                                 lv_coord_t x_ofs, lv_coord_t y_ofs)
+                               lv_coord_t x_ofs, lv_coord_t y_ofs)
 {
     lv_coord_t new_x = lv_obj_get_x(obj);
     lv_coord_t new_y = lv_obj_get_y(obj);
@@ -4206,7 +4372,7 @@ static void trans_anim_cb(lv_style_trans_t * tr, lv_anim_value_t v)
         else x = tr->end_value._ptr;
         _lv_style_set_ptr(style, tr->prop, x);
     }
-    lv_obj_refresh_style(tr->obj, tr->prop);
+    lv_obj_refresh_style(tr->obj, tr->part, tr->prop);
 
 }
 
@@ -4301,3 +4467,204 @@ static bool obj_valid_child(const lv_obj_t * parent, const lv_obj_t * obj_to_fin
 
     return false;
 }
+
+static bool style_prop_is_cacheble(lv_style_property_t prop)
+{
+
+    switch(prop) {
+    case LV_STYLE_PROP_ALL:
+    case LV_STYLE_BG_GRAD_DIR:
+    case LV_STYLE_CLIP_CORNER:
+    case LV_STYLE_TEXT_LETTER_SPACE:
+    case LV_STYLE_TEXT_LINE_SPACE:
+    case LV_STYLE_TEXT_FONT:
+    case LV_STYLE_TRANSFORM_ANGLE:
+    case LV_STYLE_TRANSFORM_WIDTH:
+    case LV_STYLE_TRANSFORM_HEIGHT:
+    case LV_STYLE_TRANSFORM_ZOOM:
+    case LV_STYLE_BORDER_WIDTH:
+    case LV_STYLE_OUTLINE_WIDTH:
+    case LV_STYLE_RADIUS:
+    case LV_STYLE_SHADOW_WIDTH:
+    case LV_STYLE_OPA_SCALE:
+    case LV_STYLE_BG_OPA:
+    case LV_STYLE_BORDER_SIDE:
+    case LV_STYLE_BORDER_POST:
+    case LV_STYLE_IMAGE_RECOLOR_OPA:
+    case LV_STYLE_VALUE_STR:
+    case LV_STYLE_PATTERN_IMAGE:
+    case LV_STYLE_PAD_TOP:
+    case LV_STYLE_PAD_BOTTOM:
+    case LV_STYLE_PAD_LEFT:
+    case LV_STYLE_PAD_RIGHT:
+    case LV_STYLE_BG_BLEND_MODE:
+    case LV_STYLE_BORDER_BLEND_MODE:
+    case LV_STYLE_IMAGE_BLEND_MODE:
+    case LV_STYLE_LINE_BLEND_MODE:
+    case LV_STYLE_OUTLINE_BLEND_MODE:
+    case LV_STYLE_PATTERN_BLEND_MODE:
+    case LV_STYLE_SHADOW_BLEND_MODE:
+    case LV_STYLE_TEXT_BLEND_MODE:
+    case LV_STYLE_VALUE_BLEND_MODE:
+        return true;
+        break;
+    default:
+        return false;
+    }
+}
+
+/**
+ * Update the cache of style list
+ * @param obj pointer to an obejct
+ * @param part the part of the object
+ * @param prop the property which triggered the update
+ */
+static void update_style_cache(lv_obj_t * obj, uint8_t part, uint16_t prop)
+{
+    if(style_prop_is_cacheble(prop) == false) return;
+
+    lv_style_list_t * list = lv_obj_get_style_list(obj, part);
+
+    bool ignore_cache_ori = list->ignore_cache;
+    list->ignore_cache = 1;
+
+#if LV_USE_OPA_SCALE
+    list->opa_scale_cover    = lv_obj_get_style_opa_scale(obj, part) == LV_OPA_COVER ? 1 : 0;
+#else
+    list->opa_scale_cover    = 1;
+#endif
+    list->text_decor_none    = lv_obj_get_style_text_decor(obj, part) == LV_TEXT_DECOR_NONE ? 1 : 0;
+    list->text_font_normal    = lv_obj_get_style_text_font(obj, part) == LV_THEME_DEFAULT_FONT_NORMAL ? 1 : 0;
+
+    list->text_space_zero = 1;
+    if(lv_obj_get_style_text_letter_space(obj, part) != 0 ||
+       lv_obj_get_style_text_line_space(obj, part) != 0) {
+        list->text_space_zero = 0;
+    }
+
+
+    lv_opa_t bg_opa = lv_obj_get_style_bg_opa(obj, part);
+    list->bg_opa_transp    = bg_opa == LV_OPA_TRANSP ? 1 : 0;
+    list->bg_opa_cover     = bg_opa == LV_OPA_COVER ? 1 : 0;
+
+    list->bg_grad_dir_none  = lv_obj_get_style_bg_grad_dir(obj, part) == LV_GRAD_DIR_NONE ? 1 : 0;
+    list->border_width_zero = lv_obj_get_style_border_width(obj, part) == 0 ? 1 : 0;
+    list->border_side_full = lv_obj_get_style_border_side(obj, part) == LV_BORDER_SIDE_FULL ? 1 : 0;
+    list->border_post_off = lv_obj_get_style_border_post(obj, part) == 0 ? 1 : 0;
+    list->clip_corner_off   = lv_obj_get_style_clip_corner(obj, part) == false ? 1 : 0;
+    list->img_recolor_opa_transp    = lv_obj_get_style_image_recolor_opa(obj, part) == LV_OPA_TRANSP ? 1 : 0;
+    list->outline_width_zero    = lv_obj_get_style_outline_width(obj, part) == 0 ? 1 : 0;
+    list->pattern_img_null    = lv_obj_get_style_pattern_image(obj, part) == NULL ? 1 : 0;
+    list->radius_zero    = lv_obj_get_style_radius(obj, part) == 0 ? 1 : 0;
+    list->shadow_width_zero    = lv_obj_get_style_shadow_width(obj, part) == 0 ? 1 : 0;
+    list->value_txt_str    = lv_obj_get_style_value_str(obj, part) == NULL ? 1 : 0;
+
+
+    list->transform_all_zero  = 1;
+    if(lv_obj_get_style_transform_angle(obj, part) != 0 ||
+       lv_obj_get_style_transform_width(obj, part) != 0 ||
+       lv_obj_get_style_transform_height(obj, part) != 0 ||
+       lv_obj_get_style_transform_zoom(obj, part) != LV_IMG_ZOOM_NONE)
+    {
+        list->transform_all_zero  = 0;
+    }
+
+    list->pad_all_zero  = 1;
+    if(lv_obj_get_style_pad_top(obj, part) != 0 ||
+        lv_obj_get_style_pad_bottom(obj, part) != 0 ||
+        lv_obj_get_style_pad_left(obj, part) != 0 ||
+        lv_obj_get_style_pad_right(obj, part) != 0)
+    {
+        list->pad_all_zero  = 0;
+    }
+
+    list->blend_mode_all_normal = 1;
+#if LV_USE_BLEND_MODES
+    if(lv_obj_get_style_bg_blend_mode(obj, part) != LV_BLEND_MODE_NORMAL ||
+            lv_obj_get_style_border_blend_mode(obj, part) != LV_BLEND_MODE_NORMAL ||
+            lv_obj_get_style_pattern_blend_mode(obj, part) != LV_BLEND_MODE_NORMAL ||
+            lv_obj_get_style_outline_blend_mode(obj, part) != LV_BLEND_MODE_NORMAL ||
+            lv_obj_get_style_value_blend_mode(obj, part) != LV_BLEND_MODE_NORMAL ||
+            lv_obj_get_style_text_blend_mode(obj, part) != LV_BLEND_MODE_NORMAL ||
+            lv_obj_get_style_line_blend_mode(obj, part) != LV_BLEND_MODE_NORMAL ||
+            lv_obj_get_style_image_blend_mode(obj, part) != LV_BLEND_MODE_NORMAL ||
+            lv_obj_get_style_shadow_blend_mode(obj, part) != LV_BLEND_MODE_NORMAL)
+    {
+        list->blend_mode_all_normal = 0;
+    }
+#endif
+    list->ignore_cache = ignore_cache_ori;
+    list->valid_cache = 1;
+}
+
+/**
+ * Update the cache of style list
+ * @param obj pointer to an object
+ * @param part the part of the object
+ */
+static void update_style_cache_children(lv_obj_t * obj)
+{
+    uint8_t part;
+    for(part = 0; part != _LV_OBJ_PART_REAL_LAST; part++) {
+        lv_style_list_t * list = lv_obj_get_style_list(obj, part);
+        if(list == NULL) break;
+
+        bool ignore_cache_ori = list->ignore_cache;
+        list->ignore_cache = 1;
+
+        list->opa_scale_cover    = lv_obj_get_style_opa_scale(obj, part) == LV_OPA_COVER ? 1 : 0;
+        list->text_decor_none    = lv_obj_get_style_text_decor(obj, part) == LV_TEXT_DECOR_NONE ? 1 : 0;
+        list->text_font_normal    = lv_obj_get_style_text_font(obj, part) == lv_theme_get_font_normal() ? 1 : 0;
+        list->img_recolor_opa_transp    = lv_obj_get_style_image_recolor_opa(obj, part) == LV_OPA_TRANSP ? 1 : 0;
+
+        list->text_space_zero = 1;
+        if(lv_obj_get_style_text_letter_space(obj, part) != 0 ||
+                lv_obj_get_style_text_line_space(obj, part) != 0) {
+            list->text_space_zero = 0;
+        }
+
+        list->ignore_cache = ignore_cache_ori;
+    }
+
+    lv_obj_t * child = lv_obj_get_child(obj, NULL);
+    while(child) {
+        update_style_cache_children(child);
+        child = lv_obj_get_child(obj, child);
+    }
+
+}
+
+/**
+ * Mark the object and all of it's children's style lists as invalid.
+ * The cache will be updated when a cached property asked nest time
+ * @param obj pointer to an object
+ */
+static void invalidate_style_cache(lv_obj_t * obj, uint8_t part, lv_style_property_t prop)
+{
+    if(style_prop_is_cacheble(prop) == false) return;
+
+    if(part != LV_OBJ_PART_ALL) {
+        lv_style_list_t * list = lv_obj_get_style_list(obj, part);
+        if(list == NULL) return;
+        list->valid_cache = 0;
+    } else {
+
+        for(part = 0; part < _LV_OBJ_PART_REAL_FIRST; part++) {
+            lv_style_list_t * list = lv_obj_get_style_list(obj, part);
+            if(list == NULL) break;
+            list->valid_cache = 0;
+        }
+        for(part = _LV_OBJ_PART_REAL_FIRST; part < 0xFF; part++) {
+               lv_style_list_t * list = lv_obj_get_style_list(obj, part);
+               if(list == NULL) break;
+               list->valid_cache = 0;
+           }
+    }
+
+    lv_obj_t * child = lv_obj_get_child(obj, NULL);
+    while(child) {
+        update_style_cache_children(child);
+        child = lv_obj_get_child(obj, child);
+    }
+}
+

src/lv_core/lv_obj.h

@@ -105,6 +105,7 @@ enum {
     LV_EVENT_APPLY,  /**< "Ok", "Apply" or similar specific button has clicked*/
     LV_EVENT_CANCEL, /**< "Close", "Cancel" or similar specific button has clicked*/
     LV_EVENT_DELETE, /**< Object is being deleted */
+    _LV_EVENT_LAST /** Number of events*/
 };
 typedef uint8_t lv_event_t; /**< Type of event being sent to the object. */
 
@@ -162,7 +163,7 @@ typedef struct {
     lv_coord_t yofs;
     lv_align_t align;
     uint8_t auto_realign : 1;
-    uint8_t origo_align : 1; /**< 1: the origo (center of the object) was aligned with
+    uint8_t mid_align : 1; /**< 1: the origo (center of the object) was aligned with
                                 `lv_obj_align_origo`*/
 } lv_realign_t;
 #endif
@@ -353,6 +354,22 @@ void lv_obj_invalidate_area(const lv_obj_t * obj, const lv_area_t * area);
  */
 void lv_obj_invalidate(const lv_obj_t * obj);
 
+
+/**
+ * Tell whether an area of an object is visible (even partially) now or not
+ * @param obj pointer to an object
+ * @param area the are to check. The visible part of the area will be written back here.
+ * @return true: visible; false: not visible (hidden, out of parent, on other screen, etc)
+ */
+bool lv_obj_area_is_visible(const lv_obj_t * obj, lv_area_t * area);
+
+/**
+ * Tell whether an object is visible (even partially) now or not
+ * @param obj pointer to an object
+ * @return true: visible; false: not visible (hidden, out of parent, on other screen, etc)
+ */
+bool lv_obj_is_visible(const lv_obj_t * obj);
+
 /*=====================
  * Setter functions
  *====================*/
@@ -494,7 +511,7 @@ void lv_obj_align_y(lv_obj_t * obj, const lv_obj_t * base, lv_align_t align, lv_
  * @param x_ofs x coordinate offset after alignment
  * @param y_ofs y coordinate offset after alignment
  */
-void lv_obj_align_origo(lv_obj_t * obj, const lv_obj_t * base, lv_align_t align, lv_coord_t x_ofs, lv_coord_t y_ofs);
+void lv_obj_align_mid(lv_obj_t * obj, const lv_obj_t * base, lv_align_t align, lv_coord_t x_ofs, lv_coord_t y_ofs);
 
 
 /**
@@ -504,7 +521,7 @@ void lv_obj_align_origo(lv_obj_t * obj, const lv_obj_t * base, lv_align_t align,
  * @param align type of alignment (see 'lv_align_t' enum)
  * @param x_ofs x coordinate offset after alignment
  */
-void lv_obj_align_origo_x(lv_obj_t * obj, const lv_obj_t * base, lv_align_t align, lv_coord_t x_ofs);
+void lv_obj_align_mid_x(lv_obj_t * obj, const lv_obj_t * base, lv_align_t align, lv_coord_t x_ofs);
 
 /**
  * Align an object's middle point to an other object vertically.
@@ -513,7 +530,7 @@ void lv_obj_align_origo_x(lv_obj_t * obj, const lv_obj_t * base, lv_align_t alig
  * @param align type of alignment (see 'lv_align_t' enum)
  * @param y_ofs y coordinate offset after alignment
  */
-void lv_obj_align_origo_y(lv_obj_t * obj, const lv_obj_t * base, lv_align_t align, lv_coord_t y_ofs);
+void lv_obj_align_mid_y(lv_obj_t * obj, const lv_obj_t * base, lv_align_t align, lv_coord_t y_ofs);
 
 /**
  * Realign the object based on the last `lv_obj_align` parameters.
@@ -586,7 +603,7 @@ void lv_obj_reset_style_list(lv_obj_t * obj, uint8_t part);
  * @param obj pointer to an object
  * @param prop `LV_STYLE_PROP_ALL` or an `LV_STYLE_...` property. It is used to optimize what needs to be refreshed.
  */
-void lv_obj_refresh_style(lv_obj_t * obj, lv_style_property_t prop);
+void lv_obj_refresh_style(lv_obj_t * obj, uint8_t part, lv_style_property_t prop);
 
 /**
  * Notify all object if a style is modified
@@ -664,6 +681,13 @@ void _lv_obj_set_style_local_ptr(lv_obj_t * obj, uint8_t type, lv_style_property
  */
 bool lv_obj_remove_style_local_prop(lv_obj_t * obj, uint8_t part, lv_style_property_t prop);
 
+/**
+ * Enable/disable the use of style cahche for an object
+ * @param obj pointer to an object
+ * @param dis true: disable; false: enable (re-enable)
+ */
+void _lv_obj_disable_style_caching(lv_obj_t * obj, bool dis);
+
 /*-----------------
  * Attribute set
  *----------------*/

src/lv_core/lv_style.c

@@ -875,7 +875,8 @@ lv_res_t _lv_style_list_get_color(lv_style_list_t * list, lv_style_property_t pr
 
     int16_t weight = -1;
 
-    lv_color_t value_act = { 0 };
+    lv_color_t value_act;
+    value_act.full = 0;
 
     int16_t ci;
     for(ci = 0; ci < list->style_cnt; ci++) {
@@ -1039,7 +1040,6 @@ bool lv_debug_check_style_list(const lv_style_list_t * list)
     return true;
 }
 
-
 /**********************
  *   STATIC FUNCTIONS
  **********************/
@@ -1104,7 +1104,7 @@ static lv_style_t * get_alloc_local_style(lv_style_list_t * list)
 {
     LV_ASSERT_STYLE_LIST(list);
 
-    if(list->has_local) return lv_style_list_get_style(list, 0);
+    if(list->has_local) return lv_style_list_get_style(list, list->has_trans ? 1 : 0);
 
     lv_style_t * local_style = lv_mem_alloc(sizeof(lv_style_t));
     LV_ASSERT_MEM(local_style);

src/lv_core/lv_style.h

@@ -221,11 +221,37 @@ typedef struct {
 #if LV_USE_ASSERT_STYLE
     uint32_t sentinel;
 #endif
-    uint8_t style_cnt;
+    uint32_t style_cnt     :6;
-    uint8_t has_local    : 1;
+    uint32_t has_local     :1;
-    uint8_t has_trans    : 1;
+    uint32_t has_trans     :1;
-    uint8_t skip_trans   : 1;       /*1: Temporally skip the transition style if any*/
+    uint32_t skip_trans    :1;       /*1: Temporally skip the transition style if any*/
-    uint8_t ignore_trans   : 1;     /*1: Mark that this style list shouldn't receive transitions at all*/
+    uint32_t ignore_trans  :1;       /*1: Mark that this style list shouldn't receive transitions at all*/
+    uint32_t valid_cache   :1;       /*1: The cache is valid and can be used*/
+    uint32_t ignore_cache  :1;       /*1: Ignore cache while getting value of properties*/
+
+    uint32_t radius_zero :1;
+    uint32_t opa_scale_cover      :1;
+    uint32_t clip_corner_off       :1;
+    uint32_t transform_all_zero  :1;
+    uint32_t pad_all_zero :1;
+    uint32_t blend_mode_all_normal :1;
+    uint32_t bg_opa_transp :1;
+    uint32_t bg_opa_cover :1;
+    uint32_t bg_grad_dir_none :1;
+
+    uint32_t border_width_zero :1;
+    uint32_t border_side_full :1;
+    uint32_t border_post_off :1;
+
+    uint32_t outline_width_zero :1;
+    uint32_t pattern_img_null :1;
+    uint32_t shadow_width_zero :1;
+    uint32_t value_txt_str :1;
+    uint32_t img_recolor_opa_transp :1;
+
+    uint32_t text_space_zero :1;
+    uint32_t text_decor_none :1;
+    uint32_t text_font_normal :1;
 } lv_style_list_t;
 
 /**********************

src/lv_draw/lv_draw_arc.c

@@ -65,17 +65,18 @@ static void get_rounded_area(int16_t angle, lv_coord_t radius, uint8_t tickness,
  * @param mask the arc will be drawn only in this mask
  * @param start_angle the start angle of the arc (0 deg on the bottom, 90 deg on the right)
  * @param end_angle the end angle of the arc
- * @param style style of the arc (`body.thickness`, `body.main_color`, `body.opa` is used)
+ * @param clip_area the arc will be drawn only in this area
- * @param opa_scale scale down all opacities by the factor
+ * @param dsc pointer to an initialized `lv_draw_line_dsc_t` variable
  */
 void lv_draw_arc(lv_coord_t center_x, lv_coord_t center_y, uint16_t radius,  uint16_t start_angle, uint16_t end_angle,
-                 const lv_area_t * clip_area, lv_draw_line_dsc_t * dsc)
+                 const lv_area_t * clip_area, const lv_draw_line_dsc_t * dsc)
 {
     if(dsc->opa <= LV_OPA_MIN) return;
     if(dsc->width == 0) return;
     if(start_angle == end_angle) return;
 
-    if(dsc->width > radius) dsc->width = radius;
+    lv_style_int_t width = dsc->width;
+    if(width > radius) width = radius;
 
     lv_draw_rect_dsc_t cir_dsc;
     lv_draw_rect_dsc_init(&cir_dsc);
@@ -83,7 +84,7 @@ void lv_draw_arc(lv_coord_t center_x, lv_coord_t center_y, uint16_t radius,  uin
     cir_dsc.bg_opa = LV_OPA_TRANSP;
     cir_dsc.border_opa = dsc->opa;
     cir_dsc.border_color = dsc->color;
-    cir_dsc.border_width = dsc->width;
+    cir_dsc.border_width = width;
     cir_dsc.border_blend_mode = dsc->blend_mode;
 
     lv_area_t area;
@@ -123,7 +124,7 @@ void lv_draw_arc(lv_coord_t center_x, lv_coord_t center_y, uint16_t radius,  uin
         q_dsc.end_angle = end_angle;
         q_dsc.start_quarter = (start_angle / 90) & 0x3;
         q_dsc.end_quarter = (end_angle / 90) & 0x3;
-        q_dsc.width = dsc->width;
+        q_dsc.width = width;
         q_dsc.draw_dsc =  &cir_dsc;
         q_dsc.draw_area = &area;
         q_dsc.clip_area = clip_area;
@@ -146,7 +147,7 @@ void lv_draw_arc(lv_coord_t center_x, lv_coord_t center_y, uint16_t radius,  uin
 
         lv_area_t round_area;
         if(dsc->round_start) {
-            get_rounded_area(start_angle, radius, dsc->width, &round_area);
+            get_rounded_area(start_angle, radius, width, &round_area);
             round_area.x1 += center_x;
             round_area.x2 += center_x;
             round_area.y1 += center_y;
@@ -156,7 +157,7 @@ void lv_draw_arc(lv_coord_t center_x, lv_coord_t center_y, uint16_t radius,  uin
         }
 
         if(dsc->round_end) {
-            get_rounded_area(end_angle, radius, dsc->width, &round_area);
+            get_rounded_area(end_angle, radius, width, &round_area);
             round_area.x1 += center_x;
             round_area.x2 += center_x;
             round_area.y1 += center_y;

src/lv_draw/lv_draw_arc.h

@@ -35,11 +35,11 @@ extern "C" {
  * @param mask the arc will be drawn only in this mask
  * @param start_angle the start angle of the arc (0 deg on the bottom, 90 deg on the right)
  * @param end_angle the end angle of the arc
- * @param style style of the arc (`body.thickness`, `body.main_color`, `body.opa` is used)
+ * @param clip_area the arc will be drawn only in this area
- * @param opa_scale scale down all opacities by the factor
+ * @param dsc pointer to an initialized `lv_draw_line_dsc_t` variable
  */
 void lv_draw_arc(lv_coord_t center_x, lv_coord_t center_y, uint16_t radius,  uint16_t start_angle, uint16_t end_angle,
-                 const lv_area_t * clip_area, lv_draw_line_dsc_t * dsc);
+                 const lv_area_t * clip_area, const lv_draw_line_dsc_t * dsc);
 
 /**********************
  *      MACROS

src/lv_draw/lv_draw_img.c

@@ -29,11 +29,11 @@
  **********************/
 LV_ATTRIBUTE_FAST_MEM static lv_res_t lv_img_draw_core(const lv_area_t * coords, const lv_area_t * clip_area,
                                                        const void * src,
-                                                       lv_draw_img_dsc_t * draw_dsc);
+                                                       const lv_draw_img_dsc_t * draw_dsc);
 
 LV_ATTRIBUTE_FAST_MEM static void lv_draw_map(const lv_area_t * map_area, const lv_area_t * clip_area,
                                               const uint8_t * map_p,
-                                              lv_draw_img_dsc_t * draw_dsc,
+                                              const lv_draw_img_dsc_t * draw_dsc,
                                               bool chroma_key, bool alpha_byte);
 
 static void show_error(const lv_area_t * coords, const lv_area_t * clip_area, const char * msg);
@@ -65,13 +65,9 @@ void lv_draw_img_dsc_init(lv_draw_img_dsc_t * dsc)
  * @param coords the coordinates of the image
  * @param mask the image will be drawn only in this area
  * @param src pointer to a lv_color_t array which contains the pixels of the image
- * @param style style of the image
+ * @param dsc pointer to an initialized `lv_draw_img_dsc_t` variable
- * @param angle rotation angle of the image
- * @param center rotation center of the image
- * @param antialias anti-alias transformations (rotate, zoom) or not
- * @param opa_scale scale down all opacities by the factor
  */
-void lv_draw_img(const lv_area_t * coords, const lv_area_t * mask, const void * src, lv_draw_img_dsc_t * dsc)
+void lv_draw_img(const lv_area_t * coords, const lv_area_t * mask, const void * src, const lv_draw_img_dsc_t * dsc)
 {
     if(src == NULL) {
         LV_LOG_WARN("Image draw: src is NULL");
@@ -232,7 +228,7 @@ lv_img_src_t lv_img_src_get_type(const void * src)
 
 LV_ATTRIBUTE_FAST_MEM static lv_res_t lv_img_draw_core(const lv_area_t * coords, const lv_area_t * clip_area,
                                                        const void * src,
-                                                       lv_draw_img_dsc_t * draw_dsc)
+                                                       const lv_draw_img_dsc_t * draw_dsc)
 {
     if(draw_dsc->opa <= LV_OPA_MIN) return LV_RES_OK;
 
@@ -327,18 +323,14 @@ LV_ATTRIBUTE_FAST_MEM static lv_res_t lv_img_draw_core(const lv_area_t * coords,
  * @param cords_p coordinates the color map
  * @param mask_p the map will drawn only on this area  (truncated to VDB area)
  * @param map_p pointer to a lv_color_t array
- * @param opa opacity of the map
+ * @param draw_dsc pointer to an initialized `lv_draw_img_dsc_t` variable
  * @param chroma_keyed true: enable transparency of LV_IMG_LV_COLOR_TRANSP color pixels
  * @param alpha_byte true: extra alpha byte is inserted for every pixel
- * @param style style of the image
- * @param angle angle in degree
- * @param pivot center of rotation
- * @param zoom zoom factor
- * @param antialias anti-alias transformations (rotate, zoom) or not
  */
 LV_ATTRIBUTE_FAST_MEM static void lv_draw_map(const lv_area_t * map_area, const lv_area_t * clip_area,
                                               const uint8_t * map_p,
-                                              lv_draw_img_dsc_t * draw_dsc, bool chroma_key, bool alpha_byte)
+                                              const lv_draw_img_dsc_t * draw_dsc,
+                                              bool chroma_key, bool alpha_byte)
 {
     /* Use the clip area as draw area*/
     lv_area_t draw_area;

src/lv_draw/lv_draw_img.h

@@ -53,13 +53,9 @@ void lv_draw_img_dsc_init(lv_draw_img_dsc_t * dsc);
  * @param coords the coordinates of the image
  * @param mask the image will be drawn only in this area
  * @param src pointer to a lv_color_t array which contains the pixels of the image
- * @param style style of the image
+ * @param dsc pointer to an initialized `lv_draw_img_dsc_t` variable
- * @param angle rotation angle of the image
- * @param center rotation center of the image
- * @param antialias anti-alias transformations (rotate, zoom) or not
- * @param opa_scale scale down all opacities by the factor
  */
-void lv_draw_img(const lv_area_t * coords, const lv_area_t * mask, const void * src, lv_draw_img_dsc_t * dsc);
+void lv_draw_img(const lv_area_t * coords, const lv_area_t * mask, const void * src, const lv_draw_img_dsc_t * dsc);
 
 /**
  * Get the type of an image source

src/lv_draw/lv_draw_label.c

@@ -111,8 +111,10 @@ LV_ATTRIBUTE_FAST_MEM void lv_draw_label_dsc_init(lv_draw_label_dsc_t * dsc)
  * @param hint pointer to a `lv_draw_label_hint_t` variable.
  * It is managed by the drawer to speed up the drawing of very long texts (thousands of lines).
  */
-LV_ATTRIBUTE_FAST_MEM void lv_draw_label(const lv_area_t * coords, const lv_area_t * mask, lv_draw_label_dsc_t * dsc,
+LV_ATTRIBUTE_FAST_MEM void lv_draw_label(const lv_area_t * coords, const lv_area_t * mask,
-                                         const char * txt, lv_draw_label_hint_t * hint)
+                                         const lv_draw_label_dsc_t * dsc,
+                                         const char * txt,
+                                         lv_draw_label_hint_t * hint)
 {
 
     if(dsc->opa <= LV_OPA_MIN) return;
@@ -213,12 +215,12 @@ LV_ATTRIBUTE_FAST_MEM void lv_draw_label(const lv_area_t * coords, const lv_area
         sel_start = sel_end;
         sel_end = tmp;
     }
-
     lv_draw_line_dsc_t line_dsc;
+
     if((dsc->decor & LV_TEXT_DECOR_UNDERLINE) || (dsc->decor & LV_TEXT_DECOR_STRIKETHROUGH)) {
         lv_draw_line_dsc_init(&line_dsc);
         line_dsc.color = dsc->color;
-        line_dsc.width = (dsc->font->line_height + 5) / 10;    /*+5 for rounding*/
+        line_dsc.width = font->underline_thickness ? font->underline_thickness : LV_MATH_MAX(font->line_height / 10, 1);
         line_dsc.opa = dsc->opa;
         line_dsc.blend_mode = dsc->blend_mode;
     }
@@ -342,7 +344,7 @@ LV_ATTRIBUTE_FAST_MEM void lv_draw_label(const lv_area_t * coords, const lv_area
             lv_point_t p1;
             lv_point_t p2;
             p1.x = pos_x_start;
-            p1.y = pos.y + dsc->font->line_height - dsc->font->base_line + line_dsc.width / 2 + 1;
+            p1.y = pos.y + dsc->font->line_height - dsc->font->base_line - font->underline_position;
             p2.x = pos.x;
             p2.y = p1.y;
             lv_draw_line(&p1, &p2, mask, &line_dsc);

src/lv_draw/lv_draw_label.h

@@ -77,7 +77,8 @@ LV_ATTRIBUTE_FAST_MEM void lv_draw_label_dsc_init(lv_draw_label_dsc_t * dsc);
  * @param hint pointer to a `lv_draw_label_hint_t` variable.
  * It is managed by the drawer to speed up the drawing of very long texts (thousands of lines).
  */
-LV_ATTRIBUTE_FAST_MEM void lv_draw_label(const lv_area_t * coords, const lv_area_t * mask, lv_draw_label_dsc_t * dsc,
+LV_ATTRIBUTE_FAST_MEM void lv_draw_label(const lv_area_t * coords, const lv_area_t * mask,
+                                         const lv_draw_label_dsc_t * dsc,
                                          const char * txt, lv_draw_label_hint_t * hint);
 
 //! @endcond

src/lv_draw/lv_draw_line.c

@@ -26,13 +26,13 @@
  **********************/
 LV_ATTRIBUTE_FAST_MEM static void draw_line_skew(const lv_point_t * point1, const lv_point_t * point2,
                                                  const lv_area_t * clip,
-                                                 lv_draw_line_dsc_t * dsc);
+                                                 const lv_draw_line_dsc_t * dsc);
 LV_ATTRIBUTE_FAST_MEM static void draw_line_hor(const lv_point_t * point1, const lv_point_t * point2,
                                                 const lv_area_t * clip,
-                                                lv_draw_line_dsc_t * dsc);
+                                                const lv_draw_line_dsc_t * dsc);
 LV_ATTRIBUTE_FAST_MEM static void draw_line_ver(const lv_point_t * point1, const lv_point_t * point2,
                                                 const lv_area_t * clip,
-                                                lv_draw_line_dsc_t * dsc);
+                                                const lv_draw_line_dsc_t * dsc);
 
 /**********************
  *  STATIC VARIABLES
@@ -58,12 +58,11 @@ LV_ATTRIBUTE_FAST_MEM void lv_draw_line_dsc_init(lv_draw_line_dsc_t * dsc)
  * Draw a line
  * @param point1 first point of the line
  * @param point2 second point of the line
- * @param mask the line will be drawn only on this area
+ * @param clip the line will be drawn only in this area
- * @param style pointer to a line's style
+ * @param dsc pointer to an initialized `lv_draw_line_dsc_t` variable
- * @param opa_scale scale down all opacities by the factor
  */
 LV_ATTRIBUTE_FAST_MEM void lv_draw_line(const lv_point_t * point1, const lv_point_t * point2, const lv_area_t * clip,
-                                        lv_draw_line_dsc_t * dsc)
+                                        const lv_draw_line_dsc_t * dsc)
 {
     if(dsc->width == 0) return;
     if(dsc->opa <= LV_OPA_MIN) return;
@@ -120,7 +119,7 @@ LV_ATTRIBUTE_FAST_MEM void lv_draw_line(const lv_point_t * point1, const lv_poin
 
 LV_ATTRIBUTE_FAST_MEM static void draw_line_hor(const lv_point_t * point1, const lv_point_t * point2,
                                                 const lv_area_t * clip,
-                                                lv_draw_line_dsc_t * dsc)
+                                                const lv_draw_line_dsc_t * dsc)
 {
     lv_opa_t opa = dsc->opa;
 
@@ -221,7 +220,7 @@ LV_ATTRIBUTE_FAST_MEM static void draw_line_hor(const lv_point_t * point1, const
 
 LV_ATTRIBUTE_FAST_MEM static void draw_line_ver(const lv_point_t * point1, const lv_point_t * point2,
                                                 const lv_area_t * clip,
-                                                lv_draw_line_dsc_t * dsc)
+                                                const lv_draw_line_dsc_t * dsc)
 {
     lv_opa_t opa = dsc->opa;
 
@@ -316,7 +315,7 @@ LV_ATTRIBUTE_FAST_MEM static void draw_line_ver(const lv_point_t * point1, const
 
 LV_ATTRIBUTE_FAST_MEM static void draw_line_skew(const lv_point_t * point1, const lv_point_t * point2,
                                                  const lv_area_t * clip,
-                                                 lv_draw_line_dsc_t * dsc)
+                                                 const lv_draw_line_dsc_t * dsc)
 {
     /*Keep the great y in p1*/
     lv_point_t p1;

src/lv_draw/lv_draw_line.h

@@ -43,12 +43,11 @@ typedef struct {
  * Draw a line
  * @param point1 first point of the line
  * @param point2 second point of the line
- * @param mask the line will be drawn only on this area
+ * @param clip the line will be drawn only in this area
- * @param style pointer to a line's style
+ * @param dsc pointer to an initialized `lv_draw_line_dsc_t` variable
- * @param opa_scale scale down all opacities by the factor
  */
-LV_ATTRIBUTE_FAST_MEM void lv_draw_line(const lv_point_t * point1, const lv_point_t * point2, const lv_area_t * mask,
+LV_ATTRIBUTE_FAST_MEM void lv_draw_line(const lv_point_t * point1, const lv_point_t * point2, const lv_area_t * clip,
-                                        lv_draw_line_dsc_t * dsc);
+                                        const lv_draw_line_dsc_t * dsc);
 
 LV_ATTRIBUTE_FAST_MEM void lv_draw_line_dsc_init(lv_draw_line_dsc_t * dsc);
 

src/lv_draw/lv_draw_rect.c

@@ -27,31 +27,32 @@
 /**********************
  *  STATIC PROTOTYPES
  **********************/
-LV_ATTRIBUTE_FAST_MEM static void draw_bg(const lv_area_t * coords, const lv_area_t * clip, lv_draw_rect_dsc_t * dsc);
+LV_ATTRIBUTE_FAST_MEM static void draw_bg(const lv_area_t * coords, const lv_area_t * clip,
+                                          const lv_draw_rect_dsc_t * dsc);
 LV_ATTRIBUTE_FAST_MEM static void draw_border(const lv_area_t * coords, const lv_area_t * clip,
-                                              lv_draw_rect_dsc_t * dsc);
+                                              const lv_draw_rect_dsc_t * dsc);
 
 #if LV_USE_OUTLINE
-    static void draw_outline(const lv_area_t * coords, const lv_area_t * clip, lv_draw_rect_dsc_t * dsc);
+    static void draw_outline(const lv_area_t * coords, const lv_area_t * clip, const lv_draw_rect_dsc_t * dsc);
 #endif
 #if LV_USE_SHADOW
 LV_ATTRIBUTE_FAST_MEM static void draw_shadow(const lv_area_t * coords, const lv_area_t * clip,
-                                              lv_draw_rect_dsc_t * dsc);
+                                              const lv_draw_rect_dsc_t * dsc);
 LV_ATTRIBUTE_FAST_MEM static void shadow_draw_corner_buf(const lv_area_t * coords,  uint16_t * sh_buf, lv_coord_t s,
                                                          lv_coord_t r);
 LV_ATTRIBUTE_FAST_MEM static void shadow_blur_corner(lv_coord_t size, lv_coord_t sw, uint16_t * sh_ups_buf);
 #endif
 
 #if LV_USE_PATTERN
-    static void draw_pattern(const lv_area_t * coords, const lv_area_t * clip, lv_draw_rect_dsc_t * dsc);
+    static void draw_pattern(const lv_area_t * coords, const lv_area_t * clip, const lv_draw_rect_dsc_t * dsc);
 #endif
 
 #if LV_USE_VALUE_STR
-    static void draw_value_str(const lv_area_t * coords, const lv_area_t * clip, lv_draw_rect_dsc_t * dsc);
+    static void draw_value_str(const lv_area_t * coords, const lv_area_t * clip, const lv_draw_rect_dsc_t * dsc);
 #endif
 static void draw_full_border(const lv_area_t * area_inner, const lv_area_t * area_outer, const lv_area_t * clip,
                              lv_coord_t radius, lv_color_t color, lv_opa_t opa, lv_blend_mode_t blend_mode);
-LV_ATTRIBUTE_FAST_MEM static inline lv_color_t grad_get(lv_draw_rect_dsc_t * dsc, lv_coord_t s, lv_coord_t i);
+LV_ATTRIBUTE_FAST_MEM static inline lv_color_t grad_get(const lv_draw_rect_dsc_t * dsc, lv_coord_t s, lv_coord_t i);
 
 /**********************
  *  STATIC VARIABLES
@@ -96,9 +97,9 @@ LV_ATTRIBUTE_FAST_MEM void lv_draw_rect_dsc_init(lv_draw_rect_dsc_t * dsc)
  * Draw a rectangle
  * @param coords the coordinates of the rectangle
  * @param mask the rectangle will be drawn only in this mask
- * @param style pointer to a style
+ * @param dsc pointer to an initialized `lv_draw_rect_dsc_t` variable
  */
-void lv_draw_rect(const lv_area_t * coords, const lv_area_t * clip, lv_draw_rect_dsc_t * dsc)
+void lv_draw_rect(const lv_area_t * coords, const lv_area_t * clip, const lv_draw_rect_dsc_t * dsc)
 {
     if(lv_area_get_height(coords) < 1 || lv_area_get_width(coords) < 1) return;
 #if LV_USE_SHADOW
@@ -162,7 +163,8 @@ void lv_draw_px(const lv_point_t * point, const lv_area_t * clip_area, const lv_
  *   STATIC FUNCTIONS
  **********************/
 
-LV_ATTRIBUTE_FAST_MEM static void draw_bg(const lv_area_t * coords, const lv_area_t * clip, lv_draw_rect_dsc_t * dsc)
+LV_ATTRIBUTE_FAST_MEM static void draw_bg(const lv_area_t * coords, const lv_area_t * clip,
+                                          const lv_draw_rect_dsc_t * dsc)
 {
     if(dsc->bg_opa <= LV_OPA_MIN) return;
 
@@ -384,11 +386,12 @@ LV_ATTRIBUTE_FAST_MEM static void draw_bg(const lv_area_t * coords, const lv_are
 }
 
 LV_ATTRIBUTE_FAST_MEM static void draw_border(const lv_area_t * coords, const lv_area_t * clip,
-                                              lv_draw_rect_dsc_t * dsc)
+                                              const lv_draw_rect_dsc_t * dsc)
 {
     if(dsc->border_opa <= LV_OPA_MIN) return;
     if(dsc->border_width == 0) return;
     if(dsc->border_side == LV_BORDER_SIDE_NONE) return;
+    if(dsc->border_post) return;
 
     int32_t coords_w = lv_area_get_width(coords);
     int32_t coords_h = lv_area_get_height(coords);
@@ -502,7 +505,7 @@ LV_ATTRIBUTE_FAST_MEM static void draw_border(const lv_area_t * coords, const lv
     }
 }
 
-LV_ATTRIBUTE_FAST_MEM static inline lv_color_t grad_get(lv_draw_rect_dsc_t * dsc, lv_coord_t s, lv_coord_t i)
+LV_ATTRIBUTE_FAST_MEM static inline lv_color_t grad_get(const lv_draw_rect_dsc_t * dsc, lv_coord_t s, lv_coord_t i)
 {
     int32_t min = (dsc->bg_main_color_stop * s) >> 8;
     if(i <= min) return dsc->bg_color;
@@ -519,7 +522,7 @@ LV_ATTRIBUTE_FAST_MEM static inline lv_color_t grad_get(lv_draw_rect_dsc_t * dsc
 
 #if LV_USE_SHADOW
 LV_ATTRIBUTE_FAST_MEM static void draw_shadow(const lv_area_t * coords, const lv_area_t * clip,
-                                              lv_draw_rect_dsc_t * dsc)
+                                              const lv_draw_rect_dsc_t * dsc)
 {
     /*Check whether the shadow is visible*/
     if(dsc->shadow_width == 0) return;
@@ -1148,7 +1151,7 @@ LV_ATTRIBUTE_FAST_MEM static void shadow_blur_corner(lv_coord_t size, lv_coord_t
 #endif
 
 #if LV_USE_OUTLINE
-static void draw_outline(const lv_area_t * coords, const lv_area_t * clip, lv_draw_rect_dsc_t * dsc)
+static void draw_outline(const lv_area_t * coords, const lv_area_t * clip, const lv_draw_rect_dsc_t * dsc)
 {
     if(dsc->outline_opa <= LV_OPA_MIN) return;
     if(dsc->outline_width == 0) return;
@@ -1178,9 +1181,8 @@ static void draw_outline(const lv_area_t * coords, const lv_area_t * clip, lv_dr
 }
 #endif
 
-
 #if LV_USE_PATTERN
-static void draw_pattern(const lv_area_t * coords, const lv_area_t * clip, lv_draw_rect_dsc_t * dsc)
+static void draw_pattern(const lv_area_t * coords, const lv_area_t * clip, const lv_draw_rect_dsc_t * dsc)
 {
     if(dsc->pattern_image == NULL) return;
     if(dsc->pattern_opa <= LV_OPA_MIN) return;
@@ -1284,7 +1286,7 @@ static void draw_pattern(const lv_area_t * coords, const lv_area_t * clip, lv_dr
 
 
 #if LV_USE_VALUE_STR
-static void draw_value_str(const lv_area_t * coords, const lv_area_t * clip, lv_draw_rect_dsc_t * dsc)
+static void draw_value_str(const lv_area_t * coords, const lv_area_t * clip, const lv_draw_rect_dsc_t * dsc)
 {
     if(dsc->value_str == NULL) return;
     if(dsc->value_opa <= LV_OPA_MIN) return;

src/lv_draw/lv_draw_rect.h

@@ -41,6 +41,7 @@ typedef struct {
     lv_style_int_t border_side;
     lv_opa_t border_opa;
     lv_blend_mode_t border_blend_mode;
+    uint8_t border_post :1;         /*There is a border it will be drawn later. */
 
     /*Outline*/
     lv_color_t outline_color;
@@ -92,9 +93,9 @@ LV_ATTRIBUTE_FAST_MEM void lv_draw_rect_dsc_init(lv_draw_rect_dsc_t * dsc);
  * Draw a rectangle
  * @param coords the coordinates of the rectangle
  * @param mask the rectangle will be drawn only in this mask
- * @param style pointer to a style
+ * @param dsc pointer to an initialized `lv_draw_rect_dsc_t` variable
  */
-void lv_draw_rect(const lv_area_t * coords, const lv_area_t * mask, lv_draw_rect_dsc_t * dsc);
+void lv_draw_rect(const lv_area_t * coords, const lv_area_t * mask, const lv_draw_rect_dsc_t * dsc);
 
 /**
  * Draw a pixel

src/lv_draw/lv_draw_triangle.c

@@ -40,7 +40,7 @@
  * @param clip_area the triangle will be drawn only in this area
  * @param draw_dsc pointer to an initialized `lv_draw_rect_dsc_t` variable
  */
-void lv_draw_triangle(const lv_point_t points[], const lv_area_t * clip_area, lv_draw_rect_dsc_t * draw_dsc)
+void lv_draw_triangle(const lv_point_t points[], const lv_area_t * clip_area, const lv_draw_rect_dsc_t * draw_dsc)
 {
     lv_draw_polygon(points, 3, clip_area, draw_dsc);
 }
@@ -53,7 +53,7 @@ void lv_draw_triangle(const lv_point_t points[], const lv_area_t * clip_area, lv
  * @param draw_dsc pointer to an initialized `lv_draw_rect_dsc_t` variable
  */
 void lv_draw_polygon(const lv_point_t points[], uint16_t point_cnt, const lv_area_t * clip_area,
-                     lv_draw_rect_dsc_t * draw_dsc)
+                     const lv_draw_rect_dsc_t * draw_dsc)
 {
     if(point_cnt < 3) return;
     if(points == NULL) return;

src/lv_draw/lv_draw_triangle.h

@@ -33,7 +33,7 @@ extern "C" {
  * @param clip_area the triangle will be drawn only in this area
  * @param draw_dsc pointer to an initialized `lv_draw_rect_dsc_t` variable
  */
-void lv_draw_triangle(const lv_point_t points[], const lv_area_t * clip, lv_draw_rect_dsc_t * draw_dsc);
+void lv_draw_triangle(const lv_point_t points[], const lv_area_t * clip, const lv_draw_rect_dsc_t * draw_dsc);
 
 /**
  * Draw a polygon. Only convex polygons are supported.
@@ -43,7 +43,7 @@ void lv_draw_triangle(const lv_point_t points[], const lv_area_t * clip, lv_draw
  * @param draw_dsc pointer to an initialized `lv_draw_rect_dsc_t` variable
  */
 void lv_draw_polygon(const lv_point_t points[], uint16_t point_cnt, const lv_area_t * mask,
-                     lv_draw_rect_dsc_t * draw_dsc);
+                     const lv_draw_rect_dsc_t * draw_dsc);
 
 /**********************
  *      MACROS

src/lv_draw/lv_img_buf.c

@@ -435,6 +435,10 @@ void _lv_img_buf_transform_init(lv_img_transform_dsc_t * dsc)
     dsc->tmp.sinma = (s1 * (10 - angle_rem) + s2 * angle_rem) / 10;
     dsc->tmp.cosma = (c1 * (10 - angle_rem) + c2 * angle_rem) / 10;
 
+    /*Use smaller value to avoid overflow*/
+    dsc->tmp.sinma = dsc->tmp.sinma >> (LV_TRIGO_SHIFT - _LV_TRANSFORM_TRIGO_SHIFT);
+    dsc->tmp.cosma = dsc->tmp.cosma >> (LV_TRIGO_SHIFT - _LV_TRANSFORM_TRIGO_SHIFT);
+
     dsc->tmp.chroma_keyed = lv_img_cf_is_chroma_keyed(dsc->cfg.cf) ? 1 : 0;
     dsc->tmp.has_alpha = lv_img_cf_has_alpha(dsc->cfg.cf) ? 1 : 0;
     if(dsc->cfg.cf == LV_IMG_CF_TRUE_COLOR || dsc->cfg.cf == LV_IMG_CF_TRUE_COLOR_ALPHA ||
@@ -451,7 +455,9 @@ void _lv_img_buf_transform_init(lv_img_transform_dsc_t * dsc)
     dsc->tmp.img_dsc.header.w = dsc->cfg.src_w;
     dsc->tmp.img_dsc.header.h = dsc->cfg.src_h;
 
-    dsc->tmp.zoom_inv = (256 * 256) / dsc->cfg.zoom;
+    /* The inverse of the zoom will be sued during the transformation
+     *  + dsc->cfg.zoom / 2 for rounding*/
+    dsc->tmp.zoom_inv = (((256 * 256) << _LV_ZOOM_INV_UPSCALE) + dsc->cfg.zoom / 2) / dsc->cfg.zoom;
 
     dsc->res.opa = LV_OPA_COVER;
     dsc->res.color = dsc->cfg.color;
@@ -468,7 +474,7 @@ void _lv_img_buf_transform_init(lv_img_transform_dsc_t * dsc)
  * @param pivot x,y pivot coordinates of rotation
  */
 void _lv_img_buf_get_transformed_area(lv_area_t * res, lv_coord_t w, lv_coord_t h, int16_t angle, uint16_t zoom,
-                                      lv_point_t * pivot)
+                                      const lv_point_t * pivot)
 {
 #if LV_USE_IMG_TRANSFORM
     if(angle == 0 && zoom == LV_IMG_ZOOM_NONE) {
@@ -477,7 +483,20 @@ void _lv_img_buf_get_transformed_area(lv_area_t * res, lv_coord_t w, lv_coord_t
         res->x2 = w - 1;
         res->y2 = h - 1;
         return;
+    }
 
+
+    res->x1 = (((-pivot->x) * zoom) >> 8) - 1;
+    res->y1 = (((-pivot->y) * zoom) >> 8) - 1;
+    res->x2 = (((w - pivot->x) * zoom) >> 8) + 2;
+    res->y2 = (((h - pivot->y) * zoom) >> 8) + 2;
+
+    if(angle == 0) {
+        res->x1 += pivot->x;
+        res->y1 += pivot->y;
+        res->x2 += pivot->x;
+        res->y2 += pivot->y;
+        return;
     }
 
     int32_t angle_low = angle / 10;
@@ -493,6 +512,10 @@ void _lv_img_buf_get_transformed_area(lv_area_t * res, lv_coord_t w, lv_coord_t
     int32_t sinma = (s1 * (10 - angle_rem) + s2 * angle_rem) / 10;
     int32_t cosma = (c1 * (10 - angle_rem) + c2 * angle_rem) / 10;
 
+    /*Use smaller value to avoid overflow*/
+    sinma = sinma >> (LV_TRIGO_SHIFT - _LV_TRANSFORM_TRIGO_SHIFT);
+    cosma = cosma >> (LV_TRIGO_SHIFT - _LV_TRANSFORM_TRIGO_SHIFT);
+
     lv_point_t lt;
     lv_point_t rt;
     lv_point_t lb;
@@ -501,31 +524,25 @@ void _lv_img_buf_get_transformed_area(lv_area_t * res, lv_coord_t w, lv_coord_t
     lv_coord_t xt;
     lv_coord_t yt;
 
-    lv_area_t a;
+    xt = res->x1;
-    a.x1 = ((-pivot->x) * zoom) >> 8;
+    yt = res->y1;
-    a.y1 = ((-pivot->y) * zoom) >> 8;
+    lt.x = ((cosma * xt - sinma * yt) >> _LV_TRANSFORM_TRIGO_SHIFT) + pivot->x;
-    a.x2 = ((w - pivot->x) * zoom) >> 8;
+    lt.y = ((sinma * xt + cosma * yt) >> _LV_TRANSFORM_TRIGO_SHIFT) + pivot->y;
-    a.y2 = ((h - pivot->y) * zoom) >> 8;
 
-    xt = a.x1;
+    xt = res->x2;
-    yt = a.y1;
+    yt = res->y1;
-    lt.x = ((cosma * xt - sinma * yt) >> LV_TRIGO_SHIFT) + pivot->x;
+    rt.x = ((cosma * xt - sinma * yt) >> _LV_TRANSFORM_TRIGO_SHIFT) + pivot->x;
-    lt.y = ((sinma * xt + cosma * yt) >> LV_TRIGO_SHIFT) + pivot->y;
+    rt.y = ((sinma * xt + cosma * yt) >> _LV_TRANSFORM_TRIGO_SHIFT) + pivot->y;
 
-    xt = a.x2;
+    xt = res->x1;
-    yt = a.y1;
+    yt = res->y2;
-    rt.x = ((cosma * xt - sinma * yt) >> LV_TRIGO_SHIFT) + pivot->x;
+    lb.x = ((cosma * xt - sinma * yt) >> _LV_TRANSFORM_TRIGO_SHIFT) + pivot->x;
-    rt.y = ((sinma * xt + cosma * yt) >> LV_TRIGO_SHIFT) + pivot->y;
+    lb.y = ((sinma * xt + cosma * yt) >> _LV_TRANSFORM_TRIGO_SHIFT) + pivot->y;
 
-    xt = a.x1;
+    xt = res->x2;
-    yt = a.y2;
+    yt = res->y2;
-    lb.x = ((cosma * xt - sinma * yt) >> LV_TRIGO_SHIFT) + pivot->x;
+    rb.x = ((cosma * xt - sinma * yt) >> _LV_TRANSFORM_TRIGO_SHIFT) + pivot->x;
-    lb.y = ((sinma * xt + cosma * yt) >> LV_TRIGO_SHIFT) + pivot->y;
+    rb.y = ((sinma * xt + cosma * yt) >> _LV_TRANSFORM_TRIGO_SHIFT) + pivot->y;
-
-    xt = a.x2;
-    yt = a.y2;
-    rb.x = ((cosma * xt - sinma * yt) >> LV_TRIGO_SHIFT) + pivot->x;
-    rb.y = ((sinma * xt + cosma * yt) >> LV_TRIGO_SHIFT) + pivot->y;
 
     res->x1 = LV_MATH_MIN4(lb.x, lt.x, rb.x, rt.x);
     res->x2 = LV_MATH_MAX4(lb.x, lt.x, rb.x, rt.x);

src/lv_draw/lv_img_buf.h

@@ -48,6 +48,9 @@ extern "C" {
 
 #define LV_IMG_ZOOM_NONE   256
 
+#define _LV_TRANSFORM_TRIGO_SHIFT 10
+#define _LV_ZOOM_INV_UPSCALE 5
+
 /**********************
  *      TYPEDEFS
  **********************/
@@ -172,7 +175,7 @@ typedef struct {
         uint8_t has_alpha : 1;
         uint8_t native_color : 1;
 
-        uint16_t zoom_inv;
+        uint32_t zoom_inv;
 
         /*Runtime data*/
         lv_coord_t xs;
@@ -301,20 +304,20 @@ static inline bool _lv_img_buf_transform(lv_img_transform_dsc_t * dsc, lv_coord_
     int32_t ys;
     if(dsc->cfg.zoom == LV_IMG_ZOOM_NONE) {
         /*Get the source pixel from the upscaled image*/
-        xs = ((dsc->tmp.cosma * xt - dsc->tmp.sinma * yt) >> (LV_TRIGO_SHIFT - 8)) + dsc->tmp.pivot_x_256;
+        xs = ((dsc->tmp.cosma * xt - dsc->tmp.sinma * yt) >> (_LV_TRANSFORM_TRIGO_SHIFT - 8)) + dsc->tmp.pivot_x_256;
-        ys = ((dsc->tmp.sinma * xt + dsc->tmp.cosma * yt) >> (LV_TRIGO_SHIFT - 8)) + dsc->tmp.pivot_y_256;
+        ys = ((dsc->tmp.sinma * xt + dsc->tmp.cosma * yt) >> (_LV_TRANSFORM_TRIGO_SHIFT - 8)) + dsc->tmp.pivot_y_256;
     }
     else if(dsc->cfg.angle == 0) {
-        xt *= dsc->tmp.zoom_inv;
+        xt = (xt * dsc->tmp.zoom_inv) >> _LV_ZOOM_INV_UPSCALE;
-        yt *= dsc->tmp.zoom_inv;
+        yt = (yt * dsc->tmp.zoom_inv) >> _LV_ZOOM_INV_UPSCALE;
         xs = xt + dsc->tmp.pivot_x_256;
         ys = yt + dsc->tmp.pivot_y_256;
     }
     else {
-        xt *= dsc->tmp.zoom_inv;
+        xt = (xt * dsc->tmp.zoom_inv) >> _LV_ZOOM_INV_UPSCALE;
-        yt *= dsc->tmp.zoom_inv;
+        yt = (yt * dsc->tmp.zoom_inv) >> _LV_ZOOM_INV_UPSCALE;
-        xs = ((dsc->tmp.cosma * xt - dsc->tmp.sinma * yt) >> (LV_TRIGO_SHIFT)) + dsc->tmp.pivot_x_256;
+        xs = ((dsc->tmp.cosma * xt - dsc->tmp.sinma * yt) >> (_LV_TRANSFORM_TRIGO_SHIFT)) + dsc->tmp.pivot_x_256;
-        ys = ((dsc->tmp.sinma * xt + dsc->tmp.cosma * yt) >> (LV_TRIGO_SHIFT)) + dsc->tmp.pivot_y_256;
+        ys = ((dsc->tmp.sinma * xt + dsc->tmp.cosma * yt) >> (_LV_TRANSFORM_TRIGO_SHIFT)) + dsc->tmp.pivot_y_256;
     }
 
     /*Get the integer part of the source pixel*/
@@ -380,7 +383,7 @@ static inline bool _lv_img_buf_transform(lv_img_transform_dsc_t * dsc, lv_coord_
  * @param pivot x,y pivot coordinates of rotation
  */
 void _lv_img_buf_get_transformed_area(lv_area_t * res, lv_coord_t w, lv_coord_t h, int16_t angle, uint16_t zoom,
-                                      lv_point_t * pivot);
+                                      const lv_point_t * pivot);
 
 /**********************
  *      MACROS

src/lv_draw/lv_img_cache.c

@@ -59,7 +59,7 @@ static uint16_t entry_cnt;
  * The image will be left open meaning if the image decoder open callback allocated memory then it will remain.
  * The image is closed if a new image is opened and the new image takes its place in the cache.
  * @param src source of the image. Path to file or pointer to an `lv_img_dsc_t` variable
- * @param style style of the image
+ * @param color color The color of the image with `LV_IMG_CF_ALPHA_...`
  * @return pointer to the cache entry or NULL if can open the image
  */
 lv_img_cache_entry_t * _lv_img_cache_open(const void * src, lv_color_t color)

src/lv_draw/lv_img_cache.h

@@ -46,7 +46,7 @@ typedef struct {
  * The image will be left open meaning if the image decoder open callback allocated memory then it will remain.
  * The image is closed if a new image is opened and the new image takes its place in the cache.
  * @param src source of the image. Path to file or pointer to an `lv_img_dsc_t` variable
- * @param style style of the image
+ * @param color The color of the image with `LV_IMG_CF_ALPHA_...`
  * @return pointer to the cache entry or NULL if can open the image
  */
 lv_img_cache_entry_t * _lv_img_cache_open(const void * src, lv_color_t color);

src/lv_draw/lv_img_decoder.c

@@ -114,7 +114,7 @@ lv_res_t lv_img_decoder_get_info(const char * src, lv_img_header_t * header)
  *  1) File name: E.g. "S:folder/img1.png" (The drivers needs to registered via `lv_fs_add_drv()`)
  *  2) Variable: Pointer to an `lv_img_dsc_t` variable
  *  3) Symbol: E.g. `LV_SYMBOL_OK`
- * @param style the style of the image
+ * @param color The color of the image with `LV_IMG_CF_ALPHA_...`
  * @return LV_RES_OK: opened the image. `dsc->img_data` and `dsc->header` are set.
  *         LV_RES_INV: none of the registered image decoders were able to open the image.
  */
@@ -557,7 +557,7 @@ static lv_res_t lv_img_decoder_built_in_line_true_color(lv_img_decoder_dsc_t * d
     }
     uint32_t btr = len * (px_size >> 3);
     uint32_t br  = 0;
-    lv_fs_read(user_data->f, buf, btr, &br);
+    res = lv_fs_read(user_data->f, buf, btr, &br);
     if(res != LV_FS_RES_OK || btr != br) {
         LV_LOG_WARN("Built-in image decoder read failed");
         return LV_RES_INV;

src/lv_draw/lv_img_decoder.h

@@ -157,7 +157,7 @@ lv_res_t lv_img_decoder_get_info(const char * src, lv_img_header_t * header);
  *  1) File name: E.g. "S:folder/img1.png" (The drivers needs to registered via `lv_fs_add_drv()`)
  *  2) Variable: Pointer to an `lv_img_dsc_t` variable
  *  3) Symbol: E.g. `LV_SYMBOL_OK`
- * @param style the style of the image
+ * @param color The color of the image with `LV_IMG_CF_ALPHA_...`
  * @return LV_RES_OK: opened the image. `dsc->img_data` and `dsc->header` are set.
  *         LV_RES_INV: none of the registered image decoders were able to open the image.
  */

src/lv_font/lv_font.h

@@ -71,6 +71,10 @@ typedef struct _lv_font_struct {
     lv_coord_t line_height;         /**< The real line height where any text fits*/
     lv_coord_t base_line;           /**< Base line measured from the top of the line_height*/
     uint8_t subpx  : 2;             /**< An element of `lv_font_subpx_t`*/
+
+    int8_t underline_position;      /**< Distance between the top of the underline and base line (< 0 means below the base line)*/
+    int8_t  underline_thickness;     /**< Thickness of the underline*/
+
     void * dsc;                     /**< Store implementation specific or run_time data or caching here*/
 #if LV_USE_USER_DATA
     lv_font_user_data_t user_data;  /**< Custom user data for font. */

src/lv_font/lv_font.mk

@@ -1,5 +1,6 @@
 CSRCS += lv_font.c
 CSRCS += lv_font_fmt_txt.c
+CSRCS += lv_font_loader.c
 CSRCS += lv_font_montserrat_12.c
 CSRCS += lv_font_montserrat_14.c
 CSRCS += lv_font_montserrat_16.c

src/lv_font/lv_font_loader.c

@@ -0,0 +1,694 @@
+/**
+ * @file lv_font_loader.c
+ *
+ */
+
+/*********************
+ *      INCLUDES
+ *********************/
+
+#include <stdint.h>
+#include <stdbool.h>
+
+#include "../lvgl.h"
+#include "../lv_misc/lv_fs.h"
+#include "lv_font_loader.h"
+
+#if LV_USE_FILESYSTEM
+
+
+/**********************
+ *      TYPEDEFS
+ **********************/
+typedef struct {
+    lv_fs_file_t * fp;
+    int8_t bit_pos;
+    uint8_t byte_value;
+} bit_iterator_t;
+
+typedef struct font_header_bin {
+    uint32_t version;
+    uint16_t tables_count;
+    uint16_t font_size;
+    uint16_t ascent;
+    int16_t descent;
+    uint16_t typo_ascent;
+    int16_t typo_descent;
+    uint16_t typo_line_gap;
+    int16_t min_y;
+    int16_t max_y;
+    uint16_t default_advance_width;
+    uint16_t kerning_scale;
+    uint8_t index_to_loc_format;
+    uint8_t glyph_id_format;
+    uint8_t advance_width_format;
+    uint8_t bits_per_pixel;
+    uint8_t xy_bits;
+    uint8_t wh_bits;
+    uint8_t advance_width_bits;
+    uint8_t compression_id;
+    uint8_t subpixels_mode;
+    uint8_t padding;
+} font_header_bin_t;
+
+typedef struct cmap_table_bin {
+    uint32_t data_offset;
+    uint32_t range_start;
+    uint16_t range_length;
+    uint16_t glyph_id_start;
+    uint16_t data_entries_count;
+    uint8_t format_type;
+    uint8_t padding;
+} cmap_table_bin_t;
+
+
+/**********************
+ *  STATIC PROTOTYPES
+ **********************/
+static bit_iterator_t init_bit_iterator(lv_fs_file_t * fp);
+static bool lvgl_load_font(lv_fs_file_t * fp, lv_font_t * font);
+int32_t load_kern(lv_fs_file_t * fp, lv_font_fmt_txt_dsc_t * font_dsc, uint8_t format, uint32_t start);
+
+static int read_bits_signed(bit_iterator_t * it, int n_bits, lv_fs_res_t * res);
+static int read_bits(bit_iterator_t * it, int n_bits, lv_fs_res_t * res);
+
+
+/**********************
+ *      MACROS
+ **********************/
+
+/**********************
+ *   GLOBAL FUNCTIONS
+ **********************/
+
+/**
+ * Loads a `lv_font_t` object from a binary font file
+ * @param font_name filename where the font file is located
+ * @return a pointer to the font or NULL in case of error
+ */
+lv_font_t * lv_font_load(const char * font_name)
+{
+    bool success = false;
+
+    lv_font_t * font = lv_mem_alloc(sizeof(lv_font_t));
+    memset(font, 0, sizeof(lv_font_t));
+
+    lv_fs_file_t file;
+    lv_fs_res_t res = lv_fs_open(&file, font_name, LV_FS_MODE_RD);
+
+    if(res == LV_FS_RES_OK) {
+        success = lvgl_load_font(&file, font);
+    }
+
+    if(!success) {
+        LV_LOG_WARN("Error loading font file: %s\n", font_name);
+        /* 
+         * When `lvgl_load_font` fails it can leak some pointers.
+         * All non-null pointers can be assumed as allocated and
+         * `lv_font_free` should free them correctly.
+         */
+        lv_font_free(font);
+        font = NULL;
+    }
+
+    lv_fs_close(&file);
+
+    return font;
+}
+
+
+/**
+ * Frees the memory allocated by the `lv_font_load()` function
+ * @param font lv_font_t object created by the lv_font_load function
+ */
+void lv_font_free(lv_font_t * font)
+{
+    if(NULL != font) {
+        lv_font_fmt_txt_dsc_t * dsc = (lv_font_fmt_txt_dsc_t *) font->dsc;
+
+        if(NULL != dsc) {
+
+            if(dsc->kern_classes == 0) {
+                lv_font_fmt_txt_kern_pair_t * kern_dsc =
+                    (lv_font_fmt_txt_kern_pair_t *) dsc->kern_dsc;
+
+                if(NULL != kern_dsc) {
+                    if(kern_dsc->glyph_ids)
+                        lv_mem_free((void *) kern_dsc->glyph_ids);
+
+                    if(kern_dsc->values)
+                        lv_mem_free((void *) kern_dsc->values);
+
+                    lv_mem_free((void *) kern_dsc);
+                }
+            }
+            else {
+                lv_font_fmt_txt_kern_classes_t * kern_dsc =
+                    (lv_font_fmt_txt_kern_classes_t *) dsc->kern_dsc;
+
+                if(NULL != kern_dsc) {
+                    if(kern_dsc->class_pair_values)
+                        lv_mem_free((void *) kern_dsc->class_pair_values);
+
+                    if(kern_dsc->left_class_mapping)
+                        lv_mem_free((void *) kern_dsc->left_class_mapping);
+
+                    if(kern_dsc->right_class_mapping)
+                        lv_mem_free((void *) kern_dsc->right_class_mapping);
+
+                    lv_mem_free((void *) kern_dsc);
+                }
+            }
+
+            lv_font_fmt_txt_cmap_t * cmaps =
+                (lv_font_fmt_txt_cmap_t *) dsc->cmaps;
+
+            if(NULL != cmaps) {
+                for(int i = 0; i < dsc->cmap_num; ++i) {
+                    if(NULL != cmaps[i].glyph_id_ofs_list)
+                        lv_mem_free((void *) cmaps[i].glyph_id_ofs_list);
+                    if(NULL != cmaps[i].unicode_list)
+                        lv_mem_free((void *) cmaps[i].unicode_list);
+                }
+                lv_mem_free(cmaps);
+            }
+
+            if(NULL != dsc->glyph_bitmap) {
+                lv_mem_free((void *) dsc->glyph_bitmap);
+            }
+            if(NULL != dsc->glyph_dsc) {
+                lv_mem_free((void *) dsc->glyph_dsc);
+            }
+            lv_mem_free(dsc);
+        }
+        lv_mem_free(font);
+    }
+}
+
+
+/**********************
+ *   STATIC FUNCTIONS
+ **********************/
+
+static bit_iterator_t init_bit_iterator(lv_fs_file_t * fp)
+{
+    bit_iterator_t it;
+    it.fp = fp;
+    it.bit_pos = -1;
+    it.byte_value = 0;
+    return it;
+}
+
+static int read_bits(bit_iterator_t * it, int n_bits, lv_fs_res_t * res)
+{
+    int value = 0;
+    while(n_bits--) {
+        it->byte_value = it->byte_value << 1;
+        it->bit_pos--;
+
+        if(it->bit_pos < 0) {
+            it->bit_pos = 7;
+            *res = lv_fs_read(it->fp, &(it->byte_value), 1, NULL);
+            if(*res != LV_FS_RES_OK) {
+                return -1;
+            }
+        }
+        int8_t bit = (it->byte_value & 0x80) ? 1 : 0;
+
+        value |= (bit << n_bits);
+    }
+    *res = LV_FS_RES_OK;
+    return value;
+}
+
+static int read_bits_signed(bit_iterator_t * it, int n_bits, lv_fs_res_t * res)
+{
+    int value = read_bits(it, n_bits, res);
+    if(value & (1 << (n_bits - 1))) {
+        for(int bit = n_bits; bit < 8; ++bit) {
+            value |= (1 << bit);
+        }
+    }
+    return value;
+}
+
+static int read_label(lv_fs_file_t * fp, int start, const char * label)
+{
+    lv_fs_seek(fp, start);
+
+    uint32_t length;
+    char buf[4];
+
+    if(lv_fs_read(fp, &length, 4, NULL) != LV_FS_RES_OK
+       || lv_fs_read(fp, buf, 4, NULL) != LV_FS_RES_OK
+       || memcmp(label, buf, 4) != 0) {
+        LV_LOG_WARN("Error reading '%s' label.", label);
+        return -1;
+    }
+
+    return length;
+}
+
+static bool load_cmaps_tables(lv_fs_file_t * fp, lv_font_fmt_txt_dsc_t * font_dsc,
+                              uint32_t cmaps_start, cmap_table_bin_t * cmap_table)
+{
+    for(unsigned int i = 0; i < font_dsc->cmap_num; ++i) {
+        if(lv_fs_read(fp, &cmap_table[i], sizeof(cmap_table_bin_t), NULL) != LV_FS_RES_OK) {
+            return false;
+        }
+
+        lv_font_fmt_txt_cmap_t * cmap = (lv_font_fmt_txt_cmap_t *) & (font_dsc->cmaps[i]);
+
+        cmap->range_start = cmap_table[i].range_start;
+        cmap->range_length = cmap_table[i].range_length;
+        cmap->glyph_id_start = cmap_table[i].glyph_id_start;
+    }
+
+    for(unsigned int i = 0; i < font_dsc->cmap_num; ++i) {
+        lv_fs_res_t res = lv_fs_seek(fp, cmaps_start + cmap_table[i].data_offset);
+        if(res != LV_FS_RES_OK) {
+            return false;
+        }
+
+        lv_font_fmt_txt_cmap_t * cmap = (lv_font_fmt_txt_cmap_t *) & (font_dsc->cmaps[i]);
+
+        switch(cmap_table[i].format_type) {
+            case 0: {
+                    uint8_t ids_size = sizeof(uint8_t) * cmap_table[i].data_entries_count;
+                    uint8_t * glyph_id_ofs_list = lv_mem_alloc(ids_size);
+
+                    cmap->glyph_id_ofs_list = glyph_id_ofs_list;
+
+                    if(lv_fs_read(fp, glyph_id_ofs_list, ids_size, NULL) != LV_FS_RES_OK) {
+                        return false;
+                    }
+
+                    cmap->type = LV_FONT_FMT_TXT_CMAP_FORMAT0_FULL;
+                    cmap->list_length = cmap->range_length;
+                    cmap->unicode_list = NULL;
+                    break;
+                }
+            case 2:
+                cmap->type = LV_FONT_FMT_TXT_CMAP_FORMAT0_TINY;
+                cmap->list_length = 0;
+                cmap->unicode_list = NULL;
+                cmap->glyph_id_ofs_list = NULL;
+                break;
+            case 1:
+            case 3: {
+                    uint32_t list_size = sizeof(uint16_t) * cmap_table[i].data_entries_count;
+                    uint16_t * unicode_list = (uint16_t *) lv_mem_alloc(list_size);
+
+                    cmap->unicode_list = unicode_list;
+                    cmap->list_length = cmap_table[i].data_entries_count;
+
+                    if(lv_fs_read(fp, unicode_list, list_size, NULL) != LV_FS_RES_OK) {
+                        return false;
+                    }
+
+                    if(cmap_table[i].format_type == 1) {
+                        uint16_t * buf = lv_mem_alloc(sizeof(uint16_t) * cmap->list_length);
+
+                        cmap->type = LV_FONT_FMT_TXT_CMAP_SPARSE_FULL;
+                        cmap->glyph_id_ofs_list = buf;
+
+                        if(lv_fs_read(fp, buf, sizeof(uint16_t) * cmap->list_length, NULL) != LV_FS_RES_OK) {
+                            return false;
+                        }
+                    }
+                    else {
+                        cmap->type = LV_FONT_FMT_TXT_CMAP_SPARSE_TINY;
+                        cmap->glyph_id_ofs_list = NULL;
+                    }
+                    break;
+                }
+            default:
+                LV_LOG_WARN("Unknown cmaps format type %d.", cmap_table[i].format_type);
+                return false;
+        }
+    }
+    return true;
+}
+
+static int32_t load_cmaps(lv_fs_file_t * fp, lv_font_fmt_txt_dsc_t * font_dsc, uint32_t cmaps_start)
+{
+    int32_t cmaps_length = read_label(fp, cmaps_start, "cmap");
+    if(cmaps_length < 0) {
+        return -1;
+    }
+
+    uint32_t cmaps_subtables_count;
+    if(lv_fs_read(fp, &cmaps_subtables_count, sizeof(uint32_t), NULL) != LV_FS_RES_OK) {
+        return -1;
+    }
+
+    lv_font_fmt_txt_cmap_t * cmaps =
+        lv_mem_alloc(cmaps_subtables_count * sizeof(lv_font_fmt_txt_cmap_t));
+
+    memset(cmaps, 0, cmaps_subtables_count * sizeof(lv_font_fmt_txt_cmap_t));
+
+    font_dsc->cmaps = cmaps;
+    font_dsc->cmap_num = cmaps_subtables_count;
+
+    cmap_table_bin_t * cmaps_tables = lv_mem_alloc(sizeof(cmap_table_bin_t) * font_dsc->cmap_num);
+
+    bool success = load_cmaps_tables(fp, font_dsc, cmaps_start, cmaps_tables);
+
+    lv_mem_free(cmaps_tables);
+
+    return success ? cmaps_length : -1;
+}
+
+static int32_t load_glyph(lv_fs_file_t * fp, lv_font_fmt_txt_dsc_t * font_dsc,
+                          uint32_t start, uint32_t * glyph_offset, uint32_t loca_count, font_header_bin_t * header)
+{
+    int32_t glyph_length = read_label(fp, start, "glyf");
+    if(glyph_length < 0) {
+        return -1;
+    }
+
+    lv_font_fmt_txt_glyph_dsc_t * glyph_dsc = (lv_font_fmt_txt_glyph_dsc_t *)
+                                              lv_mem_alloc(loca_count * sizeof(lv_font_fmt_txt_glyph_dsc_t));
+
+    memset(glyph_dsc, 0, loca_count * sizeof(lv_font_fmt_txt_glyph_dsc_t));
+
+    font_dsc->glyph_dsc = glyph_dsc;
+
+    int cur_bmp_size = 0;
+
+    for(unsigned int i = 0; i < loca_count; ++i) {
+        lv_font_fmt_txt_glyph_dsc_t * gdsc = &glyph_dsc[i];
+
+        lv_fs_res_t res = lv_fs_seek(fp, start + glyph_offset[i]);
+        if(res != LV_FS_RES_OK) {
+            return -1;
+        }
+
+        bit_iterator_t bit_it = init_bit_iterator(fp);
+
+        if(header->advance_width_bits == 0) {
+            gdsc->adv_w = header->default_advance_width;
+        }
+        else {
+            gdsc->adv_w = read_bits(&bit_it, header->advance_width_bits, &res);
+            if(res != LV_FS_RES_OK) {
+                return -1;
+            }
+        }
+
+        if(header->advance_width_format == 0) {
+            gdsc->adv_w *= 16;
+        }
+
+        gdsc->ofs_x = read_bits_signed(&bit_it, header->xy_bits, &res);
+        if(res != LV_FS_RES_OK) {
+            return -1;
+        }
+
+        gdsc->ofs_y = read_bits_signed(&bit_it, header->xy_bits, &res);
+        if(res != LV_FS_RES_OK) {
+            return -1;
+        }
+
+        gdsc->box_w = read_bits(&bit_it, header->wh_bits, &res);
+        if(res != LV_FS_RES_OK) {
+            return -1;
+        }
+
+        gdsc->box_h = read_bits(&bit_it, header->wh_bits, &res);
+        if(res != LV_FS_RES_OK) {
+            return -1;
+        }
+
+        int nbits = header->advance_width_bits + 2 * header->xy_bits + 2 * header->wh_bits;
+        int next_offset = (i < loca_count - 1) ? glyph_offset[i + 1] : (uint32_t)(glyph_length - 1);
+        int bmp_size = next_offset - glyph_offset[i] - nbits / 8;
+
+        if(i == 0) {
+            gdsc->adv_w = 0;
+            gdsc->box_w = 0;
+            gdsc->box_h = 0;
+            gdsc->ofs_x = 0;
+            gdsc->ofs_y = 0;
+        }
+
+        gdsc->bitmap_index = cur_bmp_size;
+        if(gdsc->box_w * gdsc->box_h != 0) {
+            cur_bmp_size += bmp_size;
+        }
+    }
+
+    uint8_t * glyph_bmp = (uint8_t *) lv_mem_alloc(sizeof(uint8_t) * cur_bmp_size);
+
+    font_dsc->glyph_bitmap = glyph_bmp;
+
+    cur_bmp_size = 0;
+
+    for(unsigned int i = 1; i < loca_count; ++i) {
+        lv_fs_res_t res = lv_fs_seek(fp, start + glyph_offset[i]);
+        if(res != LV_FS_RES_OK) {
+            return -1;
+        }
+        bit_iterator_t bit_it = init_bit_iterator(fp);
+
+        int nbits = header->advance_width_bits + 2 * header->xy_bits + 2 * header->wh_bits;
+
+        read_bits(&bit_it, nbits, &res);
+        if(res != LV_FS_RES_OK) {
+            return -1;
+        }
+
+        if(glyph_dsc[i].box_w * glyph_dsc[i].box_h == 0) {
+            continue;
+        }
+
+        int next_offset = (i < loca_count - 1) ? glyph_offset[i + 1] : (uint32_t)(glyph_length - 1);
+        int bmp_size = next_offset - glyph_offset[i] - nbits / 8;
+
+        for(int k = 0; k < bmp_size; ++k) {
+            glyph_bmp[cur_bmp_size + k] = read_bits(&bit_it, 8, &res);
+            if(res != LV_FS_RES_OK) {
+                return -1;
+            }
+        }
+        cur_bmp_size += bmp_size;
+    }
+    return glyph_length;
+}
+
+/*
+ * Loads a `lv_font_t` from a binary file, given a `lv_fs_file_t`.
+ *
+ * Memory allocations on `lvgl_load_font` should be immediately zeroed and
+ * the pointer should be set on the `lv_font_t` data before any possible return.
+ *
+ * When something fails, it returns `false` and the memory on the `lv_font_t`
+ * still needs to be freed using `lv_font_free`.
+ *
+ * `lv_font_free` will assume that all non-null pointers are allocated and
+ * should be freed.
+ */
+static bool lvgl_load_font(lv_fs_file_t * fp, lv_font_t * font)
+{
+    lv_font_fmt_txt_dsc_t * font_dsc = (lv_font_fmt_txt_dsc_t *)
+                                       lv_mem_alloc(sizeof(lv_font_fmt_txt_dsc_t));
+
+    memset(font_dsc, 0, sizeof(lv_font_fmt_txt_dsc_t));
+
+    font->dsc = font_dsc;
+
+    /* header */
+    int32_t header_length = read_label(fp, 0, "head");
+    if(header_length < 0) {
+        return false;
+    }
+
+    font_header_bin_t font_header;
+    if(lv_fs_read(fp, &font_header, sizeof(font_header_bin_t), NULL) != LV_FS_RES_OK) {
+        return false;
+    }
+
+    font->base_line = -font_header.descent;
+    font->line_height = font_header.ascent - font_header.descent;
+    font->get_glyph_dsc = lv_font_get_glyph_dsc_fmt_txt;
+    font->get_glyph_bitmap = lv_font_get_bitmap_fmt_txt;
+    font->subpx = LV_FONT_SUBPX_NONE;
+
+    font_dsc->bpp = font_header.bits_per_pixel;
+    font_dsc->kern_scale = font_header.kerning_scale;
+    font_dsc->bitmap_format = font_header.compression_id;
+
+    /* cmaps */
+    uint32_t cmaps_start = header_length;
+    int32_t cmaps_length = load_cmaps(fp, font_dsc, cmaps_start);
+    if(cmaps_length < 0) {
+        return false;
+    }
+
+    /* loca */
+    uint32_t loca_start = cmaps_start + cmaps_length;
+    int32_t loca_length = read_label(fp, loca_start, "loca");
+    if(loca_length < 0) {
+        return false;
+    }
+
+    uint32_t loca_count;
+    if(lv_fs_read(fp, &loca_count, sizeof(uint32_t), NULL) != LV_FS_RES_OK) {
+        return false;
+    }
+
+    bool failed = false;
+    uint32_t * glyph_offset = lv_mem_alloc(sizeof(uint32_t) * (loca_count + 1));
+
+    for(unsigned int i = 0; i < loca_count; ++i) {
+        if(font_header.index_to_loc_format == 0) {
+            uint16_t offset;
+            if(lv_fs_read(fp, &offset, sizeof(uint16_t), NULL) != LV_FS_RES_OK) {
+                failed = true;
+                break;
+            }
+            glyph_offset[i] = offset;
+        }
+        else if(font_header.index_to_loc_format == 1) {
+            uint32_t offset;
+            if(lv_fs_read(fp, &offset, sizeof(uint32_t), NULL) != LV_FS_RES_OK) {
+                failed = true;
+                break;
+            }
+            glyph_offset[i] = offset;
+        }
+        else {
+            LV_LOG_WARN("Unknown index_to_loc_format: %d.", font_header.index_to_loc_format);
+            failed = true;
+            break;
+        }
+    }
+
+    if(failed) {
+        lv_mem_free(glyph_offset);
+        return false;
+    }
+
+    /* glyph */
+    uint32_t glyph_start = loca_start + loca_length;
+    int32_t glyph_length = load_glyph(
+                               fp, font_dsc, glyph_start, glyph_offset, loca_count, &font_header);
+
+    lv_mem_free(glyph_offset);
+
+    if(glyph_length < 0) {
+        return false;
+    }
+
+    if(font_header.tables_count < 4) {
+        font_dsc->kern_dsc = NULL;
+        font_dsc->kern_classes = 0;
+        font_dsc->kern_scale = 0;
+        return true;
+    }
+
+    uint32_t kern_start = glyph_start + glyph_length;
+
+    int32_t kern_length = load_kern(fp, font_dsc, font_header.glyph_id_format, kern_start);
+
+    return kern_length >= 0;
+}
+
+int32_t load_kern(lv_fs_file_t * fp, lv_font_fmt_txt_dsc_t * font_dsc, uint8_t format, uint32_t start)
+{
+    int32_t kern_length = read_label(fp, start, "kern");
+    if(kern_length < 0) {
+        return -1;
+    }
+
+    uint8_t kern_format_type;
+    int32_t padding;
+    if(lv_fs_read(fp, &kern_format_type, sizeof(uint8_t), NULL) != LV_FS_RES_OK ||
+       lv_fs_read(fp, &padding, 3 * sizeof(uint8_t), NULL) != LV_FS_RES_OK) {
+        return -1;
+    }
+
+    if(0 == kern_format_type) { /* sorted pairs */
+        lv_font_fmt_txt_kern_pair_t * kern_pair = lv_mem_alloc(sizeof(lv_font_fmt_txt_kern_pair_t));
+
+        memset(kern_pair, 0, sizeof(lv_font_fmt_txt_kern_pair_t));
+
+        font_dsc->kern_dsc = kern_pair;
+        font_dsc->kern_classes = 0;
+
+        uint32_t glyph_entries;
+        if(lv_fs_read(fp, &glyph_entries, sizeof(uint32_t), NULL) != LV_FS_RES_OK) {
+            return -1;
+        }
+
+        int ids_size;
+        if(format == 0) {
+            ids_size = sizeof(int8_t) * 2 * glyph_entries;
+        }
+        else {
+            ids_size = sizeof(int16_t) * 2 * glyph_entries;
+        }
+
+        uint8_t * glyph_ids = lv_mem_alloc(ids_size);
+        int8_t * values = lv_mem_alloc(glyph_entries);
+
+        kern_pair->glyph_ids_size = format;
+        kern_pair->pair_cnt = glyph_entries;
+        kern_pair->glyph_ids = glyph_ids;
+        kern_pair->values = values;
+
+        if(lv_fs_read(fp, glyph_ids, ids_size, NULL) != LV_FS_RES_OK) {
+            return -1;
+        }
+
+        if(lv_fs_read(fp, values, glyph_entries, NULL) != LV_FS_RES_OK) {
+            return -1;
+        }
+    }
+    else if(3 == kern_format_type) { /* array M*N of classes */
+
+        lv_font_fmt_txt_kern_classes_t * kern_classes = lv_mem_alloc(sizeof(lv_font_fmt_txt_kern_classes_t));
+
+        memset(kern_classes, 0, sizeof(lv_font_fmt_txt_kern_classes_t));
+
+        font_dsc->kern_dsc = kern_classes;
+        font_dsc->kern_classes = 1;
+
+        uint16_t kern_class_mapping_length;
+        uint8_t kern_table_rows;
+        uint8_t kern_table_cols;
+
+        if(lv_fs_read(fp, &kern_class_mapping_length, sizeof(uint16_t), NULL) != LV_FS_RES_OK ||
+           lv_fs_read(fp, &kern_table_rows, sizeof(uint8_t), NULL) != LV_FS_RES_OK ||
+           lv_fs_read(fp, &kern_table_cols, sizeof(uint8_t), NULL) != LV_FS_RES_OK) {
+            return -1;
+        }
+
+        int kern_values_length = sizeof(int8_t) * kern_table_rows * kern_table_cols;
+
+        uint8_t * kern_left = lv_mem_alloc(kern_class_mapping_length);
+        uint8_t * kern_right = lv_mem_alloc(kern_class_mapping_length);
+        int8_t * kern_values = lv_mem_alloc(kern_values_length);
+
+        kern_classes->left_class_mapping  = kern_left;
+        kern_classes->right_class_mapping = kern_right;
+        kern_classes->left_class_cnt = kern_table_rows;
+        kern_classes->right_class_cnt = kern_table_cols;
+        kern_classes->class_pair_values = kern_values;
+
+        if(lv_fs_read(fp, kern_left, kern_class_mapping_length, NULL) != LV_FS_RES_OK ||
+           lv_fs_read(fp, kern_right, kern_class_mapping_length, NULL) != LV_FS_RES_OK ||
+           lv_fs_read(fp, kern_values, kern_values_length, NULL) != LV_FS_RES_OK) {
+            return -1;
+        }
+    }
+    else {
+        LV_LOG_WARN("Unknown kern_format_type: %d", kern_format_type);
+        return -1;
+    }
+
+    return kern_length;
+}
+
+#endif /*LV_USE_FILESYSTEM*/
+

src/lv_font/lv_font_loader.h

@@ -0,0 +1,44 @@
+/**
+ * @file lv_font_loader.h
+ *
+ */
+
+#ifndef LV_FONT_LOADER_H
+#define LV_FONT_LOADER_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*********************
+ *      INCLUDES
+ *********************/
+
+/*********************
+ *      DEFINES
+ *********************/
+
+/**********************
+ *      TYPEDEFS
+ **********************/
+
+/**********************
+ * GLOBAL PROTOTYPES
+ **********************/
+
+#if LV_USE_FILESYSTEM
+
+lv_font_t * lv_font_load(const char * fontName);
+void lv_font_free(lv_font_t * font);
+
+#endif
+
+/**********************
+ *      MACROS
+ **********************/
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#endif /*LV_FONT_LOADER_H*/

src/lv_misc/lv_anim.c

@@ -475,8 +475,11 @@ static void anim_task(lv_task_t * param)
                 if(a->path.cb) new_value = a->path.cb(&a->path, a);
                 else new_value = lv_anim_path_linear(&a->path, a);
 
-                /*Apply the calculated value*/
+                if(new_value != a->current) {
-                if(a->exec_cb) a->exec_cb(a->var, new_value);
+                    a->current = new_value;
+                    /*Apply the calculated value*/
+                    if(a->exec_cb) a->exec_cb(a->var, new_value);
+                }
 
                 /*If the time is elapsed the animation is ready*/
                 if(a->act_time >= a->time) {

src/lv_misc/lv_anim.h

@@ -82,6 +82,7 @@ typedef struct _lv_anim_t {
     lv_anim_ready_cb_t ready_cb; /**< Call it when the animation is ready*/
     lv_anim_path_t path;         /**< Describe the path (curve) of animations*/
     int32_t start;               /**< Start value*/
+    int32_t current;             /**< Current value */
     int32_t end;                 /**< End value*/
     int32_t time;               /**< Animation time in ms*/
     int32_t act_time;            /**< Current time in animation. Set to negative to make delay.*/
@@ -171,6 +172,7 @@ static inline void lv_anim_set_delay(lv_anim_t * a, uint32_t delay)
 static inline void lv_anim_set_values(lv_anim_t * a, lv_anim_value_t start, lv_anim_value_t end)
 {
     a->start = start;
+    a->current = start;
     a->end   = end;
 }
 

src/lv_misc/lv_color.h

@@ -596,19 +596,26 @@ static inline uint8_t lv_color_brightness(lv_color_t color)
     return (uint8_t)(bright >> 3);
 }
 
+#ifdef __cplusplus
+/* Fix of msvc 2019 compiler error C4576 inside C++ code */
+#define _LV_COLOR_MAKE_TYPE_HELPER lv_color_t
+#else
+#define _LV_COLOR_MAKE_TYPE_HELPER (lv_color_t)
+#endif
+
 /* The most simple macro to create a color from R,G and B values */
 #if LV_COLOR_DEPTH == 1
-#define LV_COLOR_MAKE(r8, g8, b8) ((lv_color_t){.full = (uint8_t)((b8 >> 7) | (g8 >> 7) | (r8 >> 7))})
+#define LV_COLOR_MAKE(r8, g8, b8) (_LV_COLOR_MAKE_TYPE_HELPER{.full = (uint8_t)((b8 >> 7) | (g8 >> 7) | (r8 >> 7))})
 #elif LV_COLOR_DEPTH == 8
-#define LV_COLOR_MAKE(r8, g8, b8) ((lv_color_t){{(uint8_t)((b8 >> 6) & 0x3U), (uint8_t)((g8 >> 5) & 0x7U), (uint8_t)((r8 >> 5) & 0x7U)}})
+#define LV_COLOR_MAKE(r8, g8, b8) (_LV_COLOR_MAKE_TYPE_HELPER{{(uint8_t)((b8 >> 6) & 0x3U), (uint8_t)((g8 >> 5) & 0x7U), (uint8_t)((r8 >> 5) & 0x7U)}})
 #elif LV_COLOR_DEPTH == 16
 #if LV_COLOR_16_SWAP == 0
-#define LV_COLOR_MAKE(r8, g8, b8) ((lv_color_t){{(uint16_t)((b8 >> 3) & 0x1FU), (uint16_t)((g8 >> 2) & 0x3FU), (uint16_t)((r8 >> 3) & 0x1FU)}})
+#define LV_COLOR_MAKE(r8, g8, b8) (_LV_COLOR_MAKE_TYPE_HELPER{{(uint16_t)((b8 >> 3) & 0x1FU), (uint16_t)((g8 >> 2) & 0x3FU), (uint16_t)((r8 >> 3) & 0x1FU)}})
 #else
-#define LV_COLOR_MAKE(r8, g8, b8) ((lv_color_t){{(uint16_t)((g8 >> 5) & 0x7U), (uint16_t)((r8 >> 3) & 0x1FU), (uint16_t)((b8 >> 3) & 0x1FU), (uint16_t)((g8 >> 2) & 0x7U)}})
+#define LV_COLOR_MAKE(r8, g8, b8) (_LV_COLOR_MAKE_TYPE_HELPER{{(uint16_t)((g8 >> 5) & 0x7U), (uint16_t)((r8 >> 3) & 0x1FU), (uint16_t)((b8 >> 3) & 0x1FU), (uint16_t)((g8 >> 2) & 0x7U)}})
 #endif
 #elif LV_COLOR_DEPTH == 32
-#define LV_COLOR_MAKE(r8, g8, b8) ((lv_color_t){{b8, g8, r8, 0xff}}) /*Fix 0xff alpha*/
+#define LV_COLOR_MAKE(r8, g8, b8) (_LV_COLOR_MAKE_TYPE_HELPER{{b8, g8, r8, 0xff}}) /*Fix 0xff alpha*/
 #endif
 
 static inline lv_color_t lv_color_make(uint8_t r, uint8_t g, uint8_t b)

src/lv_misc/lv_math.c

@@ -128,7 +128,6 @@ LV_ATTRIBUTE_FAST_MEM void _lv_sqrt(uint32_t x, lv_sqrt_res_t * q, uint32_t mask
     q->f = (uint32_t)(root & 0xf) << 4;
 }
 
-
 /**
  * Calculate the atan2 of a vector.
  * @param x
@@ -232,6 +231,32 @@ int64_t _lv_pow(int64_t base, int8_t exp)
     return result;
 }
 
+/**
+ * Get the mapped of a number given an input and output range
+ * @param x integer which mapped value should be calculated
+ * @param min_in min input range
+ * @param max_in max input range
+ * @param min_out max output range
+ * @param max_out max output range
+ * @return the mapped number
+ */
+int16_t _lv_map(int32_t x, int32_t min_in, int32_t max_in, int32_t min_out, int32_t max_out)
+{
+    if(x <= min_in) return min_out;
+    if(x >= max_in) return max_out;
+
+    /* The equation should be:
+     *   ((x - min_in) / delta in) * delta_out + min_out
+     * To avoid rounding error reorder the operations:
+     *   (((x - min_in) * delta_out) / delta in) + min_out
+     */
+
+    int32_t delta_in = max_in - min_in;
+    int32_t delta_out = max_out - min_out;
+
+    return ((x - min_in) * delta_out) / delta_in + min_out;
+}
+
 /**********************
  *   STATIC FUNCTIONS
  **********************/

src/lv_misc/lv_math.h

@@ -112,6 +112,17 @@ LV_ATTRIBUTE_FAST_MEM void _lv_sqrt(uint32_t x, lv_sqrt_res_t * q, uint32_t mask
  */
 int64_t _lv_pow(int64_t base, int8_t exp);
 
+/**
+ * Get the mapped of a number given an input and output range
+ * @param x integer which mapped value should be calculated
+ * @param min_in min input range
+ * @param max_in max input range
+ * @param min_out max output range
+ * @param max_out max output range
+ * @return the mapped number
+ */
+int16_t _lv_map(int32_t x, int32_t min_in, int32_t max_in, int32_t min, int32_t max);
+
 /**********************
  *      MACROS
  **********************/

src/lv_themes/lv_theme.h

@@ -109,6 +109,9 @@ typedef enum {
 #if LV_USE_ROLLER
     LV_THEME_ROLLER,
 #endif
+#if LV_USE_ROTARY
+    LV_THEME_ROTARY,
+#endif
 #if LV_USE_SLIDER
     LV_THEME_SLIDER,
 #endif

src/lv_themes/lv_theme_empty.c

@@ -95,7 +95,7 @@ lv_theme_t * lv_theme_empty_init(lv_color_t color_primary, lv_color_t color_seco
 }
 
 
-void theme_apply(lv_theme_t * th, lv_obj_t * obj, lv_theme_style_t name)
+static void theme_apply(lv_theme_t * th, lv_obj_t * obj, lv_theme_style_t name)
 {
     LV_UNUSED(th);
     if(name == LV_THEME_SCR) {

src/lv_themes/lv_theme_material.c

@@ -86,6 +86,7 @@ typedef struct {
 #if LV_USE_ARC
     lv_style_t arc_indic;
     lv_style_t arc_bg;
+    lv_style_t arc_knob;
 #endif
 
 #if LV_USE_BAR
@@ -505,6 +506,14 @@ static void arc_init(void)
     lv_style_set_line_color(&styles->arc_bg, LV_STATE_DEFAULT, COLOR_BG_SEC);
     lv_style_set_line_width(&styles->arc_bg, LV_STATE_DEFAULT, LV_DPX(25));
     lv_style_set_line_rounded(&styles->arc_bg, LV_STATE_DEFAULT, true);
+
+    style_init_reset(&styles->arc_knob);
+    lv_style_set_radius(&styles->arc_knob, LV_STATE_DEFAULT,   LV_RADIUS_CIRCLE);
+    lv_style_set_pad_top(&styles->arc_knob, LV_STATE_DEFAULT,  LV_DPX(0));
+    lv_style_set_pad_bottom(&styles->arc_knob, LV_STATE_DEFAULT,  LV_DPX(0));
+    lv_style_set_pad_left(&styles->arc_knob, LV_STATE_DEFAULT,    LV_DPX(0));
+    lv_style_set_pad_right(&styles->arc_knob, LV_STATE_DEFAULT,   LV_DPX(0));
+
 #endif
 }
 
@@ -557,7 +566,7 @@ static void calendar_init(void)
     lv_style_set_radius(&styles->calendar_date_nums, LV_STATE_DEFAULT, LV_DPX(4));
     lv_style_set_text_color(&styles->calendar_date_nums, LV_STATE_CHECKED,
                             IS_LIGHT ? lv_color_hex(0x31404f) : LV_COLOR_WHITE);
-
+    lv_style_set_text_color(&styles->calendar_date_nums, LV_STATE_DISABLED, LV_COLOR_GRAY);
     lv_style_set_bg_opa(&styles->calendar_date_nums, LV_STATE_CHECKED, IS_LIGHT ? LV_OPA_20 : LV_OPA_40);
     lv_style_set_bg_opa(&styles->calendar_date_nums, LV_STATE_PRESSED, LV_OPA_20);
     lv_style_set_bg_opa(&styles->calendar_date_nums, LV_STATE_FOCUSED, LV_OPA_COVER);
@@ -620,6 +629,9 @@ static void checkbox_init(void)
     lv_style_set_radius(&styles->cb_bullet, LV_STATE_DEFAULT, LV_DPX(4));
     lv_style_set_pattern_image(&styles->cb_bullet, LV_STATE_CHECKED, LV_SYMBOL_OK);
     lv_style_set_pattern_recolor(&styles->cb_bullet, LV_STATE_CHECKED, LV_COLOR_WHITE);
+    lv_style_set_pattern_opa(&styles->cb_bullet, LV_STATE_DEFAULT, LV_OPA_TRANSP);
+    lv_style_set_pattern_opa(&styles->cb_bullet, LV_STATE_CHECKED, LV_OPA_COVER);
+    lv_style_set_transition_prop_3(&styles->cb_bullet, LV_STATE_DEFAULT, LV_STYLE_PATTERN_OPA);
     lv_style_set_text_font(&styles->cb_bullet, LV_STATE_CHECKED, theme.font_small);
     lv_style_set_pad_left(&styles->cb_bullet, LV_STATE_DEFAULT, LV_DPX(3));
     lv_style_set_pad_right(&styles->cb_bullet, LV_STATE_DEFAULT, LV_DPX(3));
@@ -1059,6 +1071,11 @@ static void theme_apply(lv_theme_t * th, lv_obj_t * obj, lv_theme_style_t name)
 
             list = lv_obj_get_style_list(obj, LV_ARC_PART_INDIC);
             _lv_style_list_add_style(list, &styles->arc_indic);
+
+            list = lv_obj_get_style_list(obj, LV_ARC_PART_KNOB);
+            _lv_style_list_add_style(list, &styles->bg);
+            _lv_style_list_add_style(list, &styles->bg_click);
+            _lv_style_list_add_style(list, &styles->arc_knob);
             break;
 #endif
 
@@ -1185,7 +1202,6 @@ static void theme_apply(lv_theme_t * th, lv_obj_t * obj, lv_theme_style_t name)
             break;
 #endif
 
-
 #if LV_USE_OBJMASK
         case LV_THEME_OBJMASK:
             list = lv_obj_get_style_list(obj, LV_OBJMASK_PART_MAIN);
@@ -1368,7 +1384,7 @@ static void theme_apply(lv_theme_t * th, lv_obj_t * obj, lv_theme_style_t name)
             break;
     }
 
-    lv_obj_refresh_style(obj, LV_STYLE_PROP_ALL);
+    lv_obj_refresh_style(obj, LV_OBJ_PART_ALL, LV_STYLE_PROP_ALL);
 }
 
 /**********************

src/lv_themes/lv_theme_mono.c

@@ -1023,7 +1023,7 @@ static void theme_apply(lv_theme_t * th, lv_obj_t * obj, lv_theme_style_t name)
     }
 
 
-    lv_obj_refresh_style(obj, LV_STYLE_PROP_ALL);
+    lv_obj_refresh_style(obj, LV_OBJ_PART_ALL, LV_STYLE_PROP_ALL);
 
 
 }

src/lv_themes/lv_theme_template.c

@@ -855,7 +855,7 @@ void theme_apply(lv_theme_t * th, lv_obj_t * obj, lv_theme_style_t name)
             break;
     }
 
-    lv_obj_refresh_style(obj, LV_STYLE_PROP_ALL);
+    lv_obj_refresh_style(obj, LV_OBJ_PART_ALL, LV_STYLE_PROP_ALL);
 }
 
 /**********************

src/lv_widgets/lv_arc.c

@@ -9,6 +9,8 @@
 #include "lv_arc.h"
 #if LV_USE_ARC != 0
 
+#include "../lv_core/lv_group.h"
+#include "../lv_core/lv_indev.h"
 #include "../lv_misc/lv_debug.h"
 #include "../lv_misc/lv_math.h"
 #include "../lv_draw/lv_draw_arc.h"
@@ -29,7 +31,9 @@
 static lv_design_res_t lv_arc_design(lv_obj_t * arc, const lv_area_t * clip_area, lv_design_mode_t mode);
 static lv_res_t lv_arc_signal(lv_obj_t * arc, lv_signal_t sign, void * param);
 static lv_style_list_t * lv_arc_get_style(lv_obj_t * arc, uint8_t part);
-static void inv_arc_area(lv_obj_t * arc, uint16_t start_angle, uint16_t end_angle);
+static void inv_arc_area(lv_obj_t * arc, uint16_t start_angle, uint16_t end_angle, lv_arc_part_t part);
+static void get_center(lv_obj_t * arc, lv_point_t * center, lv_coord_t * arc_r);
+static void get_knob_area(lv_obj_t * arc, const lv_point_t * center, lv_coord_t r, lv_area_t * knob_area);
 
 /**********************
  *  STATIC VARIABLES
@@ -78,7 +82,16 @@ lv_obj_t * lv_arc_create(lv_obj_t * par, const lv_obj_t * copy)
     ext->bg_angle_end   = 45;
     ext->arc_angle_start = 135;
     ext->arc_angle_end   = 270;
+    ext->type = LV_ARC_TYPE_NORMAL;
+    ext->cur_value = -1;
+    ext->min_value = 0;
+    ext->max_value = 100;
+    ext->dragging = false;
+    ext->chg_rate = 540;
+    ext->last_tick = lv_tick_get();
+    ext->last_angle = ext->arc_angle_end;
     lv_style_list_init(&ext->style_arc);
+    lv_style_list_init(&ext->style_knob);
 
     lv_obj_set_size(arc, LV_DPI, LV_DPI);
 
@@ -88,6 +101,10 @@ lv_obj_t * lv_arc_create(lv_obj_t * par, const lv_obj_t * copy)
 
     /*Init the new arc arc*/
     if(copy == NULL) {
+        lv_obj_set_click(arc, true);
+        lv_obj_add_protect(arc, LV_PROTECT_PRESS_LOST);
+        lv_obj_set_ext_click_area(arc, LV_DPI / 10, LV_DPI / 10, LV_DPI / 10, LV_DPI / 10);
+        lv_arc_set_value(arc, ext->min_value);
         lv_theme_apply(arc, LV_THEME_ARC);
     }
     /*Copy an existing arc*/
@@ -97,11 +114,19 @@ lv_obj_t * lv_arc_create(lv_obj_t * par, const lv_obj_t * copy)
         ext->arc_angle_end   = copy_ext->arc_angle_end;
         ext->bg_angle_start  = copy_ext->bg_angle_start;
         ext->bg_angle_end    = copy_ext->bg_angle_end;
-
+        ext->type = copy_ext->type;
+        ext->cur_value = copy_ext->cur_value;
+        ext->min_value = copy_ext->min_value;
+        ext->max_value = copy_ext->max_value;
+        ext->dragging = copy_ext->dragging;
+        ext->chg_rate = copy_ext->chg_rate;
+        ext->last_tick = copy_ext->last_tick;
+        ext->last_angle = copy_ext->last_angle;
+        lv_style_list_copy(&ext->style_knob, &copy_ext->style_knob);
         lv_style_list_copy(&ext->style_arc, &copy_ext->style_arc);
 
         /*Refresh the style with new signal function*/
-        lv_obj_refresh_style(arc, LV_STYLE_PROP_ALL);
+        lv_obj_refresh_style(arc, LV_OBJ_PART_ALL, LV_STYLE_PROP_ALL);
     }
 
     LV_LOG_INFO("arc created");
@@ -140,11 +165,11 @@ void lv_arc_set_start_angle(lv_obj_t * arc, uint16_t start)
     }
     /*Only a smaller incremental move*/
     else if(ext->arc_angle_start > ext->arc_angle_end && start > ext->arc_angle_end) {
-        inv_arc_area(arc, LV_MATH_MIN(ext->arc_angle_start, start), LV_MATH_MAX(ext->arc_angle_start, start));
+        inv_arc_area(arc, LV_MATH_MIN(ext->arc_angle_start, start), LV_MATH_MAX(ext->arc_angle_start, start), LV_ARC_PART_INDIC);
     }
     /*Only a smaller incremental move*/
     else  if(ext->arc_angle_start < ext->arc_angle_end && start < ext->arc_angle_end) {
-        inv_arc_area(arc, LV_MATH_MIN(ext->arc_angle_start, start), LV_MATH_MAX(ext->arc_angle_start, start));
+        inv_arc_area(arc, LV_MATH_MIN(ext->arc_angle_start, start), LV_MATH_MAX(ext->arc_angle_start, start), LV_ARC_PART_INDIC);
     }
     /*Crossing the start angle makes the whole arc change*/
     else {
@@ -173,11 +198,11 @@ void lv_arc_set_end_angle(lv_obj_t * arc, uint16_t end)
     }
     /*Only a smaller incremental move*/
     else if(ext->arc_angle_end > ext->arc_angle_start && end > ext->arc_angle_start) {
-        inv_arc_area(arc, LV_MATH_MIN(ext->arc_angle_end, end), LV_MATH_MAX(ext->arc_angle_end, end));
+        inv_arc_area(arc, LV_MATH_MIN(ext->arc_angle_end, end), LV_MATH_MAX(ext->arc_angle_end, end), LV_ARC_PART_INDIC);
     }
     /*Only a smaller incremental move*/
     else  if(ext->arc_angle_end < ext->arc_angle_start && end < ext->arc_angle_start) {
-        inv_arc_area(arc, LV_MATH_MIN(ext->arc_angle_end, end), LV_MATH_MAX(ext->arc_angle_end, end));
+        inv_arc_area(arc, LV_MATH_MIN(ext->arc_angle_end, end), LV_MATH_MAX(ext->arc_angle_end, end), LV_ARC_PART_INDIC);
     }
     /*Crossing the end angle makes the whole arc change*/
     else {
@@ -203,12 +228,12 @@ void lv_arc_set_angles(lv_obj_t * arc, uint16_t start, uint16_t end)
     if(start > 360) start -= 360;
     if(end > (start + 360)) end = start + 360;
 
-    inv_arc_area(arc, ext->arc_angle_start, ext->arc_angle_end);
+    inv_arc_area(arc, ext->arc_angle_start, ext->arc_angle_end, LV_ARC_PART_INDIC);
 
     ext->arc_angle_start = start;
     ext->arc_angle_end = end;
 
-    inv_arc_area(arc, ext->arc_angle_start, ext->arc_angle_end);
+    inv_arc_area(arc, ext->arc_angle_start, ext->arc_angle_end, LV_ARC_PART_INDIC);
 }
 
 /**
@@ -230,11 +255,11 @@ void lv_arc_set_bg_start_angle(lv_obj_t * arc, uint16_t start)
     }
     /*Only a smaller incremental move*/
     else if(ext->bg_angle_start > ext->bg_angle_end && start > ext->bg_angle_end) {
-        inv_arc_area(arc, LV_MATH_MIN(ext->bg_angle_start, start), LV_MATH_MAX(ext->bg_angle_start, start));
+        inv_arc_area(arc, LV_MATH_MIN(ext->bg_angle_start, start), LV_MATH_MAX(ext->bg_angle_start, start), LV_ARC_PART_BG);
     }
     /*Only a smaller incremental move*/
     else  if(ext->bg_angle_start < ext->bg_angle_end && start < ext->bg_angle_end) {
-        inv_arc_area(arc, LV_MATH_MIN(ext->bg_angle_start, start), LV_MATH_MAX(ext->bg_angle_start, start));
+        inv_arc_area(arc, LV_MATH_MIN(ext->bg_angle_start, start), LV_MATH_MAX(ext->bg_angle_start, start), LV_ARC_PART_BG);
     }
     /*Crossing the start angle makes the whole arc change*/
     else {
@@ -263,11 +288,11 @@ void lv_arc_set_bg_end_angle(lv_obj_t * arc, uint16_t end)
     }
     /*Only a smaller incremental move*/
     else if(ext->bg_angle_end > ext->bg_angle_start && end > ext->bg_angle_start) {
-        inv_arc_area(arc, LV_MATH_MIN(ext->bg_angle_end, end), LV_MATH_MAX(ext->bg_angle_end, end));
+        inv_arc_area(arc, LV_MATH_MIN(ext->bg_angle_end, end), LV_MATH_MAX(ext->bg_angle_end, end), LV_ARC_PART_BG);
     }
     /*Only a smaller incremental move*/
     else  if(ext->bg_angle_end < ext->bg_angle_start && end < ext->bg_angle_start) {
-        inv_arc_area(arc, LV_MATH_MIN(ext->bg_angle_end, end), LV_MATH_MAX(ext->bg_angle_end, end));
+        inv_arc_area(arc, LV_MATH_MIN(ext->bg_angle_end, end), LV_MATH_MAX(ext->bg_angle_end, end), LV_ARC_PART_BG);
     }
     /*Crossing the end angle makes the whole arc change*/
     else {
@@ -292,12 +317,12 @@ void lv_arc_set_bg_angles(lv_obj_t * arc, uint16_t start, uint16_t end)
     if(start > 360) start -= 360;
     if(end > (start + 360)) end = start + 360;
 
-    inv_arc_area(arc, ext->bg_angle_start, ext->bg_angle_end);
+    inv_arc_area(arc, ext->bg_angle_start, ext->bg_angle_end, LV_ARC_PART_BG);
 
     ext->bg_angle_start = start;
     ext->bg_angle_end = end;
 
-    inv_arc_area(arc, ext->bg_angle_start, ext->bg_angle_end);
+    inv_arc_area(arc, ext->bg_angle_start, ext->bg_angle_end, LV_ARC_PART_BG);
 }
 
 /**
@@ -316,6 +341,131 @@ void lv_arc_set_rotation(lv_obj_t * arc, uint16_t rotation_angle)
     lv_obj_invalidate(arc);
 }
 
+
+/**
+ * Set the type of arc.
+ * @param arc pointer to arc object
+ * @param type arc type
+ */
+void lv_arc_set_type(lv_obj_t * arc, lv_arc_type_t type)
+{
+    LV_ASSERT_OBJ(arc, LV_OBJX_NAME);
+
+    lv_arc_ext_t *ext = (lv_arc_ext_t *)lv_obj_get_ext_attr(arc);
+    int16_t val = ext->cur_value;
+
+    ext->type = type;
+    ext->cur_value = -1; /** Force set_value handling*/
+
+    int16_t bg_midpoint, bg_end = ext->bg_angle_end;
+    if (ext->bg_angle_end < ext->bg_angle_start) bg_end = ext->bg_angle_end + 360;
+
+    switch(ext->type) {
+        case LV_ARC_TYPE_SYMMETRIC:
+            bg_midpoint = (ext->bg_angle_start + bg_end) / 2;
+            lv_arc_set_start_angle(arc, bg_midpoint);
+            lv_arc_set_end_angle(arc, bg_midpoint);
+            break;
+        case LV_ARC_TYPE_REVERSE:
+            lv_arc_set_end_angle(arc, ext->bg_angle_end);
+            break;
+        default: /** LV_ARC_TYPE_NORMAL*/
+            lv_arc_set_start_angle(arc, ext->bg_angle_start);
+    }
+
+    lv_arc_set_value(arc, val);
+}
+
+/**
+ * Set a new value on the arc
+ * @param arc pointer to a arc object
+ * @param value new value
+ */
+void lv_arc_set_value(lv_obj_t * arc, int16_t value)
+{
+    LV_ASSERT_OBJ(arc, LV_OBJX_NAME);
+
+    lv_arc_ext_t * ext = (lv_arc_ext_t *)lv_obj_get_ext_attr(arc);
+    if(ext->cur_value == value) return;
+
+    int16_t new_value;
+    new_value = value > ext->max_value ? ext->max_value : value;
+    new_value = new_value < ext->min_value ? ext->min_value : new_value;
+
+    if(ext->cur_value == new_value) return;
+    ext->cur_value = new_value;
+
+    int16_t bg_midpoint, range_midpoint, bg_end = ext->bg_angle_end;
+    if (ext->bg_angle_end < ext->bg_angle_start) bg_end = ext->bg_angle_end + 360;
+
+    int16_t angle;
+    switch(ext->type) {
+        case LV_ARC_TYPE_SYMMETRIC:
+            bg_midpoint = (ext->bg_angle_start + bg_end) / 2;
+            range_midpoint = (int32_t)(ext->min_value + ext->max_value) / 2;
+
+            if (ext->cur_value < range_midpoint) {
+                angle = _lv_map(ext->cur_value, ext->min_value, range_midpoint, ext->bg_angle_start, bg_midpoint);
+                lv_arc_set_start_angle(arc, angle);
+                lv_arc_set_end_angle(arc, bg_midpoint);
+            } else {
+                angle = _lv_map(ext->cur_value, range_midpoint, ext->max_value, bg_midpoint, bg_end);
+                lv_arc_set_start_angle(arc, bg_midpoint);
+                lv_arc_set_end_angle(arc, angle);
+            }
+            break;
+        case LV_ARC_TYPE_REVERSE:
+            angle = _lv_map(ext->cur_value, ext->min_value, ext->max_value, ext->bg_angle_start, bg_end);
+            lv_arc_set_start_angle(arc, angle);
+            break;
+        default: /** LV_ARC_TYPE_NORMAL*/
+            angle = _lv_map(ext->cur_value, ext->min_value, ext->max_value, ext->bg_angle_start, bg_end);
+            lv_arc_set_end_angle(arc, angle);
+    }
+    ext->last_angle = angle; /*Cache angle for slew rate limiting*/
+}
+
+/**
+ * Set minimum and the maximum values of a arc
+ * @param arc pointer to the arc object
+ * @param min minimum value
+ * @param max maximum value
+ */
+void lv_arc_set_range(lv_obj_t * arc, int16_t min, int16_t max)
+{
+     LV_ASSERT_OBJ(arc, LV_OBJX_NAME);
+
+    lv_arc_ext_t * ext = (lv_arc_ext_t *)lv_obj_get_ext_attr(arc);
+    if(ext->min_value == min && ext->max_value == max) return;
+
+    ext->min_value = min;
+    ext->max_value = max;
+
+    if(ext->cur_value < min) {
+        ext->cur_value = min;
+    }
+    if(ext->cur_value > max) {
+        ext->cur_value = max;
+    }
+
+    lv_arc_set_value(arc, ext->cur_value);
+}
+
+/**
+ * Set the threshold of arc knob increments
+ * position.
+ * @param arc pointer to a arc object
+ * @param threshold increment threshold
+ */
+void lv_arc_set_chg_rate(lv_obj_t * arc, uint16_t rate)
+{
+    LV_ASSERT_OBJ(arc, LV_OBJX_NAME);
+
+    lv_arc_ext_t *ext = (lv_arc_ext_t *)lv_obj_get_ext_attr(arc);
+    ext->chg_rate = rate;
+}
+
+
 /*=====================
  * Getter functions
  *====================*/
@@ -376,6 +526,72 @@ uint16_t lv_arc_get_bg_angle_end(lv_obj_t * arc)
     return ext->bg_angle_end;
 }
 
+
+/**
+ * Get the value of a arc
+ * @param arc pointer to a arc object
+ * @return the value of the arc
+ */
+int16_t lv_arc_get_value(const lv_obj_t * arc)
+{
+    LV_ASSERT_OBJ(arc, LV_OBJX_NAME);
+
+    lv_arc_ext_t * ext = lv_obj_get_ext_attr(arc);
+    return ext->cur_value;
+}
+
+/**
+ * Get the minimum value of a arc
+ * @param arc pointer to a arc object
+ * @return the minimum value of the arc
+ */
+int16_t lv_arc_get_min_value(const lv_obj_t * arc)
+{
+    LV_ASSERT_OBJ(arc, LV_OBJX_NAME);
+
+    lv_arc_ext_t *ext = (lv_arc_ext_t *)lv_obj_get_ext_attr(arc);
+    return ext->min_value;
+}
+
+/**
+ * Get the maximum value of a arc
+ * @param arc pointer to a arc object
+ * @return the maximum value of the arc
+ */
+int16_t lv_arc_get_max_value(const lv_obj_t * arc)
+{
+    LV_ASSERT_OBJ(arc, LV_OBJX_NAME);
+
+    lv_arc_ext_t *ext = (lv_arc_ext_t *)lv_obj_get_ext_attr(arc);
+    return ext->max_value;
+}
+
+/**
+ * Give the arc is being dragged or not
+ * @param arc pointer to a arc object
+ * @return true: drag in progress false: not dragged
+ */
+bool lv_arc_is_dragged(const lv_obj_t * arc)
+{
+    LV_ASSERT_OBJ(arc, LV_OBJX_NAME);
+
+    lv_arc_ext_t * ext = lv_obj_get_ext_attr(arc);
+    return ext->dragging;
+}
+
+/**
+ * Get whether the arc is type or not.
+ * @param arc pointer to a arc object
+ * @return arc type
+ */
+lv_arc_type_t lv_arc_get_type(const lv_obj_t * arc)
+{
+    LV_ASSERT_OBJ(arc, LV_OBJX_NAME);
+
+    lv_arc_ext_t * ext = (lv_arc_ext_t *)lv_obj_get_ext_attr(arc);
+    return ext->type;
+}
+
 /*=====================
  * Other functions
  *====================*/
@@ -414,21 +630,17 @@ static lv_design_res_t lv_arc_design(lv_obj_t * arc, const lv_area_t * clip_area
 
         lv_draw_rect(&arc->coords, clip_area, &bg_dsc);
 
-        lv_coord_t left_bg = lv_obj_get_style_pad_left(arc, LV_ARC_PART_BG);
+        lv_point_t center;
-        lv_coord_t right_bg = lv_obj_get_style_pad_right(arc, LV_ARC_PART_BG);
+        lv_coord_t arc_r;
-        lv_coord_t top_bg = lv_obj_get_style_pad_top(arc, LV_ARC_PART_BG);
+        get_center(arc, &center, &arc_r);
-        lv_coord_t bottom_bg = lv_obj_get_style_pad_bottom(arc, LV_ARC_PART_BG);
-        lv_coord_t r       = (LV_MATH_MIN(lv_obj_get_width(arc) - left_bg - right_bg,
-                                          lv_obj_get_height(arc) - top_bg - bottom_bg)) / 2;
-        lv_draw_line_dsc_t arc_dsc;
-        lv_coord_t x       = arc->coords.x1 + r + left_bg;
-        lv_coord_t y       = arc->coords.y1 + r + top_bg;
 
-        if(r > 0) {
+        /*Draw the background arc*/
+        lv_draw_line_dsc_t arc_dsc;
+        if(arc_r > 0) {
             lv_draw_line_dsc_init(&arc_dsc);
             lv_obj_init_draw_line_dsc(arc, LV_ARC_PART_BG, &arc_dsc);
 
-            lv_draw_arc(x, y, r, ext->bg_angle_start + ext->rotation_angle, ext->bg_angle_end + ext->rotation_angle, clip_area,
+            lv_draw_arc(center.x, center.y, arc_r, ext->bg_angle_start + ext->rotation_angle, ext->bg_angle_end + ext->rotation_angle, clip_area,
                         &arc_dsc);
         }
 
@@ -438,15 +650,25 @@ static lv_design_res_t lv_arc_design(lv_obj_t * arc, const lv_area_t * clip_area
         lv_coord_t right_indic = lv_obj_get_style_pad_right(arc, LV_ARC_PART_INDIC);
         lv_coord_t top_indic = lv_obj_get_style_pad_top(arc, LV_ARC_PART_INDIC);
         lv_coord_t bottom_indic = lv_obj_get_style_pad_bottom(arc, LV_ARC_PART_INDIC);
-        r -= LV_MATH_MAX4(left_indic, right_indic, top_indic, bottom_indic);
+        lv_coord_t indic_r = arc_r - LV_MATH_MAX4(left_indic, right_indic, top_indic, bottom_indic);
 
-        if(r > 0) {
+        if(indic_r > 0) {
             lv_draw_line_dsc_init(&arc_dsc);
             lv_obj_init_draw_line_dsc(arc, LV_ARC_PART_INDIC, &arc_dsc);
 
-            lv_draw_arc(x, y, r, ext->arc_angle_start + ext->rotation_angle, ext->arc_angle_end + ext->rotation_angle, clip_area,
+            lv_draw_arc(center.x, center.y, indic_r, ext->arc_angle_start + ext->rotation_angle, ext->arc_angle_end + ext->rotation_angle, clip_area,
                         &arc_dsc);
         }
+
+        lv_area_t knob_area;
+        get_knob_area(arc, &center, arc_r, &knob_area);
+
+        lv_draw_rect_dsc_t knob_rect_dsc;
+        lv_draw_rect_dsc_init(&knob_rect_dsc);
+        lv_obj_init_draw_rect_dsc(arc, LV_ARC_PART_KNOB, &knob_rect_dsc);
+
+        lv_draw_rect(&knob_area, clip_area, &knob_rect_dsc);
+
     }
     /*Post draw when the children are drawn*/
     else if(mode == LV_DESIGN_DRAW_POST) {
@@ -478,7 +700,120 @@ static lv_res_t lv_arc_signal(lv_obj_t * arc, lv_signal_t sign, void * param)
 
     if(sign == LV_SIGNAL_GET_TYPE) return lv_obj_handle_get_type_signal(param, LV_OBJX_NAME);
 
-    if(sign == LV_SIGNAL_CLEANUP) {
+    lv_arc_ext_t * ext = lv_obj_get_ext_attr(arc);
+
+    if(sign == LV_SIGNAL_PRESSING) {
+        lv_indev_t * indev = lv_indev_get_act();
+        if(indev == NULL) return res;
+
+        /*Handle only pointers here*/
+        lv_indev_type_t indev_type = lv_indev_get_type(indev);
+        if(indev_type != LV_INDEV_TYPE_POINTER) return res;
+
+        lv_point_t p;
+        lv_indev_get_point(indev, &p);
+
+        /*Make point relative to the arc's center*/
+        lv_point_t center;
+        lv_coord_t r;
+        get_center(arc, &center, &r);
+
+        p.x -=  center.x;
+        p.y -=  center.y;
+
+        /*Enter dragging mode if pressed out of the knob*/
+        if(ext->dragging == false) {
+            lv_coord_t indic_width = lv_obj_get_style_line_width(arc, LV_ARC_PART_INDIC);
+            r -=  indic_width;
+            r -= r / 2; /*Add some more sensitive area*/
+            if(p.x * p.x + p.y * p.y > r * r) {
+                ext->dragging = true;
+                ext->last_tick = lv_tick_get(); /*Capture timestamp at dragging start*/
+            }
+        }
+
+        /*It must be in "dragging" mode to turn the arc*/
+        if(ext->dragging == false) return res;
+
+        /*Calculate the angle of the pressed point*/
+        int16_t angle;
+        int16_t bg_end = ext->bg_angle_end;
+        if (ext->bg_angle_end < ext->bg_angle_start) {
+            bg_end = ext->bg_angle_end + 360;
+        }
+
+        angle = 360 - _lv_atan2(p.x, p.y) + 90; /*Some transformation is required*/
+        angle -= ext->rotation_angle;
+        if(angle < ext->bg_angle_start) angle = ext->bg_angle_start;
+        if(angle > bg_end) angle = bg_end;
+
+        /*Calculate the slew rate limited angle based on change rate (degrees/sec)*/
+        int16_t delta_angle = angle - ext->last_angle;
+        uint32_t delta_tick = lv_tick_elaps(ext->last_tick);
+        int16_t delta_angle_max = (ext->chg_rate * delta_tick) / 1000;
+
+        if (delta_angle > delta_angle_max) {
+            delta_angle = delta_angle_max;
+        } else if (delta_angle < -delta_angle_max) {
+            delta_angle = -delta_angle_max;
+        }
+
+        angle = ext->last_angle + delta_angle; /*Apply the limited angle change*/
+
+        /*Rounding for symmetry*/
+        int32_t round = ((bg_end - ext->bg_angle_start) * 8) / (ext->max_value - ext->min_value);
+        round = (round + 4) >> 4;
+        angle += round;
+
+        /*Set the new value*/
+        int16_t old_value = ext->cur_value;
+        int16_t new_value = _lv_map(angle, ext->bg_angle_start, bg_end, ext->min_value, ext->max_value);
+        if(new_value != lv_arc_get_value(arc)) {
+            ext->last_tick = lv_tick_get(); /*Cache timestamp for the next iteration*/
+            lv_arc_set_value(arc, new_value); /*set_value caches the last_angle for the next iteration*/
+            if(new_value != old_value) {
+                res = lv_event_send(arc, LV_EVENT_VALUE_CHANGED, NULL);
+                if(res != LV_RES_OK) return res;
+            }
+        }
+
+        /*Don1't let the elapsed time to big while sitting on an end point*/
+        if(new_value == ext->min_value || new_value == ext->max_value) {
+            ext->last_tick = lv_tick_get(); /*Cache timestamp for the next iteration*/
+        }
+    }
+    else if(sign == LV_SIGNAL_RELEASED || sign == LV_SIGNAL_PRESS_LOST) {
+        ext->dragging = false;
+
+#if LV_USE_GROUP
+        /*Leave edit mode if released. (No need to wait for LONG_PRESS) */
+        lv_group_t * g             = lv_obj_get_group(arc);
+        bool editing               = lv_group_get_editing(g);
+        lv_indev_type_t indev_type = lv_indev_get_type(lv_indev_get_act());
+        if(indev_type == LV_INDEV_TYPE_ENCODER) {
+            if(editing) lv_group_set_editing(g, false);
+        }
+#endif
+
+    }
+    else if(sign == LV_SIGNAL_CONTROL) {
+        char c = *((char *)param);
+
+        int16_t old_value = ext->cur_value;
+        if(c == LV_KEY_RIGHT || c == LV_KEY_UP) {
+            lv_arc_set_value(arc, lv_arc_get_value(arc) + 1);
+        }
+        else if(c == LV_KEY_LEFT || c == LV_KEY_DOWN) {
+            lv_arc_set_value(arc, lv_arc_get_value(arc) - 1);
+        }
+
+        if (old_value != ext->cur_value) {
+            res = lv_event_send(arc, LV_EVENT_VALUE_CHANGED, NULL);
+            if(res != LV_RES_OK) return res;
+        }
+    }
+    else if(sign == LV_SIGNAL_CLEANUP) {
+        lv_obj_clean_style_list(arc, LV_ARC_PART_KNOB);
         lv_obj_clean_style_list(arc, LV_ARC_PART_INDIC);
     }
 
@@ -506,6 +841,9 @@ static lv_style_list_t * lv_arc_get_style(lv_obj_t * arc, uint8_t part)
         case LV_ARC_PART_INDIC:
             style_dsc_p = &ext->style_arc;
             break;
+        case LV_ARC_PART_KNOB:
+            style_dsc_p = &ext->style_knob;
+            break;
         default:
             style_dsc_p = NULL;
     }
@@ -513,8 +851,11 @@ static lv_style_list_t * lv_arc_get_style(lv_obj_t * arc, uint8_t part)
     return style_dsc_p;
 }
 
-static void inv_arc_area(lv_obj_t * arc, uint16_t start_angle, uint16_t end_angle)
+static void inv_arc_area(lv_obj_t * arc, uint16_t start_angle, uint16_t end_angle, lv_arc_part_t part)
 {
+    /*Skip this complicated invalidation if the arc is not visible*/
+    if(lv_obj_is_visible(arc) == false) return;
+
     lv_arc_ext_t * ext = lv_obj_get_ext_attr(arc);
 
     start_angle += ext->rotation_angle;
@@ -533,10 +874,26 @@ static void inv_arc_area(lv_obj_t * arc, uint16_t start_angle, uint16_t end_angl
     lv_coord_t rout       = (LV_MATH_MIN(lv_obj_get_width(arc) - left - right, lv_obj_get_height(arc) - top - bottom)) / 2;
     lv_coord_t x       = arc->coords.x1 + rout + left;
     lv_coord_t y       = arc->coords.y1 + rout + top;
-    lv_style_int_t w = lv_obj_get_style_line_width(arc, LV_ARC_PART_INDIC);
+    lv_style_int_t w = lv_obj_get_style_line_width(arc, part);
-    lv_style_int_t rounded = lv_obj_get_style_line_rounded(arc, LV_ARC_PART_INDIC);
+    lv_style_int_t rounded = lv_obj_get_style_line_rounded(arc, part);
     lv_coord_t rin       = rout - w;
-    lv_coord_t extra_area = rounded ? w / 2 + 2 : 0;
+    lv_coord_t extra_area = 0;
+
+    extra_area = rounded ? w / 2 + 2 : 0;
+
+    if(part == LV_ARC_PART_INDIC && lv_style_list_get_style(&ext->style_knob, 0) != NULL) {
+        lv_coord_t knob_extra_size = lv_obj_get_draw_rect_ext_pad_size(arc, LV_ARC_PART_KNOB);
+
+        lv_coord_t knob_left = lv_obj_get_style_pad_left(arc, LV_ARC_PART_KNOB);
+        lv_coord_t knob_right = lv_obj_get_style_pad_right(arc, LV_ARC_PART_KNOB);
+        lv_coord_t knob_top = lv_obj_get_style_pad_top(arc, LV_ARC_PART_KNOB);
+        lv_coord_t knob_bottom = lv_obj_get_style_pad_bottom(arc, LV_ARC_PART_KNOB);
+
+        knob_extra_size += LV_MATH_MAX4(knob_left, knob_right, knob_top, knob_bottom);
+
+        extra_area = LV_MATH_MAX(extra_area, w / 2 + 2 + knob_extra_size);
+
+    }
 
     lv_area_t inv_area;
 
@@ -617,4 +974,56 @@ static void inv_arc_area(lv_obj_t * arc, uint16_t start_angle, uint16_t end_angl
         lv_obj_invalidate(arc);
     }
 }
+
+static void get_center(lv_obj_t * arc, lv_point_t * center, lv_coord_t * arc_r)
+{
+    lv_coord_t left_bg = lv_obj_get_style_pad_left(arc, LV_ARC_PART_BG);
+    lv_coord_t right_bg = lv_obj_get_style_pad_right(arc, LV_ARC_PART_BG);
+    lv_coord_t top_bg = lv_obj_get_style_pad_top(arc, LV_ARC_PART_BG);
+    lv_coord_t bottom_bg = lv_obj_get_style_pad_bottom(arc, LV_ARC_PART_BG);
+
+    lv_coord_t r = (LV_MATH_MIN(lv_obj_get_width(arc) - left_bg - right_bg,
+                                lv_obj_get_height(arc) - top_bg - bottom_bg)) / 2;
+
+    *arc_r = r;
+    center->x = arc->coords.x1 + r + left_bg;
+    center->y = arc->coords.y1 + r + top_bg;
+
+
+    lv_coord_t indic_width = lv_obj_get_style_line_width(arc, LV_ARC_PART_INDIC);
+    r -= indic_width;
+}
+
+static void get_knob_area(lv_obj_t * arc, const lv_point_t * center, lv_coord_t r, lv_area_t * knob_area)
+{
+    lv_arc_ext_t * ext = lv_obj_get_ext_attr(arc);
+
+    lv_coord_t indic_width = lv_obj_get_style_line_width(arc, LV_ARC_PART_INDIC);
+    lv_coord_t indic_width_half = indic_width / 2;
+    r -= indic_width_half;
+
+    uint16_t angle = ext->rotation_angle;
+    if(ext->type == LV_ARC_TYPE_NORMAL) {
+        angle += ext->arc_angle_end;
+    } else if(ext->type == LV_ARC_TYPE_REVERSE) {
+        angle += ext->arc_angle_start;
+    } else if(ext->type == LV_ARC_TYPE_SYMMETRIC) {
+        int32_t range_midpoint = (int32_t)(ext->min_value + ext->max_value) / 2;
+        if(ext->cur_value < range_midpoint) angle += ext->arc_angle_start;
+        else angle += ext->arc_angle_end;
+    }
+    lv_coord_t knob_x = (r * _lv_trigo_sin(angle + 90)) >> LV_TRIGO_SHIFT;
+    lv_coord_t knob_y = (r * _lv_trigo_sin(angle)) >> LV_TRIGO_SHIFT;
+
+    lv_coord_t left_knob = lv_obj_get_style_pad_left(arc, LV_ARC_PART_KNOB);
+    lv_coord_t right_knob = lv_obj_get_style_pad_right(arc, LV_ARC_PART_KNOB);
+    lv_coord_t top_knob = lv_obj_get_style_pad_top(arc, LV_ARC_PART_KNOB);
+    lv_coord_t bottom_knob = lv_obj_get_style_pad_bottom(arc, LV_ARC_PART_KNOB);
+
+    knob_area->x1 = center->x + knob_x - left_knob - indic_width_half;
+    knob_area->x2 = center->x + knob_x + right_knob + indic_width_half;
+    knob_area->y1 = center->y + knob_y - top_knob - indic_width_half;
+    knob_area->y2 = center->y + knob_y + bottom_knob + indic_width_half;
+}
+
 #endif

src/lv_widgets/lv_arc.h

@@ -26,6 +26,14 @@ extern "C" {
 /**********************
  *      TYPEDEFS
  **********************/
+
+enum {
+    LV_ARC_TYPE_NORMAL,
+    LV_ARC_TYPE_SYMMETRIC,
+    LV_ARC_TYPE_REVERSE
+};
+typedef uint8_t lv_arc_type_t;
+
 /*Data of arc*/
 typedef struct {
     /*New data for this type */
@@ -35,14 +43,24 @@ typedef struct {
     uint16_t bg_angle_start;
     uint16_t bg_angle_end;
     lv_style_list_t style_arc;
+    lv_style_list_t style_knob; /* Style of the knob */
+
+    int16_t cur_value; /*Current value of the arc*/
+    int16_t min_value; /*Minimum value of the arc*/
+    int16_t max_value; /*Maximum value of the arc*/
+    uint16_t dragging    :1;
+    uint16_t type        :2;
+    uint16_t chg_rate; /*Drag angle rate of change of the arc (degrees/sec)*/
+    uint32_t last_tick; /*Last dragging event timestamp of the arc*/
+    int16_t last_angle; /*Last dragging angle of the arc*/
 } lv_arc_ext_t;
 
 /*Parts of the arc*/
 enum {
     LV_ARC_PART_BG = LV_OBJ_PART_MAIN,
     LV_ARC_PART_INDIC,
+    LV_ARC_PART_KNOB,
     _LV_ARC_PART_VIRTUAL_LAST,
-
     _LV_ARC_PART_REAL_LAST = _LV_OBJ_PART_REAL_LAST,
 };
 typedef uint8_t lv_arc_part_t;
@@ -118,6 +136,37 @@ void lv_arc_set_bg_angles(lv_obj_t * arc, uint16_t start, uint16_t end);
  */
 void lv_arc_set_rotation(lv_obj_t * arc, uint16_t rotation_angle);
 
+
+/**
+ * Set the type of arc.
+ * @param arc pointer to arc object
+ * @param type arc type
+ */
+void lv_arc_set_type(lv_obj_t * arc, lv_arc_type_t type);
+
+/**
+ * Set a new value on the arc
+ * @param arc pointer to a arc object
+ * @param value new value
+ */
+void lv_arc_set_value(lv_obj_t * arc, int16_t value);
+
+/**
+ * Set minimum and the maximum values of a arc
+ * @param arc pointer to the arc object
+ * @param min minimum value
+ * @param max maximum value
+ */
+void lv_arc_set_range(lv_obj_t * arc, int16_t min, int16_t max);
+
+/**
+ * Set the threshold of arc knob increments
+ * position.
+ * @param arc pointer to a arc object
+ * @param threshold increment threshold
+ */
+void lv_arc_set_chg_rate(lv_obj_t * arc, uint16_t threshold);
+
 /*=====================
  * Getter functions
  *====================*/
@@ -150,6 +199,41 @@ uint16_t lv_arc_get_bg_angle_start(lv_obj_t * arc);
  */
 uint16_t lv_arc_get_bg_angle_end(lv_obj_t * arc);
 
+/**
+ * Get whether the arc is type or not.
+ * @param arc pointer to a arc object
+ * @return arc type
+ */
+lv_arc_type_t lv_arc_get_type(const lv_obj_t * arc);
+
+/**
+ * Get the value of the of a arc
+ * @param arc pointer to a arc object
+ * @return the value of the of the arc
+ */
+int16_t lv_arc_get_value(const lv_obj_t * arc);
+
+/**
+ * Get the minimum value of a arc
+ * @param arc pointer to a arc object
+ * @return the minimum value of the arc
+ */
+int16_t lv_arc_get_min_value(const lv_obj_t * arc);
+
+/**
+ * Get the maximum value of a arc
+ * @param arc pointer to a arc object
+ * @return the maximum value of the arc
+ */
+int16_t lv_arc_get_max_value(const lv_obj_t * arc);
+
+/**
+ * Give the arc is being dragged or not
+ * @param arc pointer to a arc object
+ * @return true: drag in progress false: not dragged
+ */
+bool lv_arc_is_dragged(const lv_obj_t * arc);
+
 /*=====================
  * Other functions
  *====================*/

src/lv_widgets/lv_bar.c

@@ -130,7 +130,7 @@ lv_obj_t * lv_bar_create(lv_obj_t * par, const lv_obj_t * copy)
         lv_style_list_copy(&ext->style_indic, &ext_copy->style_indic);
 
         /*Refresh the style with new signal function*/
-        lv_obj_refresh_style(bar, LV_STYLE_PROP_ALL);
+        lv_obj_refresh_style(bar, LV_OBJ_PART_ALL, LV_STYLE_PROP_ALL);
 
         lv_bar_set_value(bar, ext->cur_value, LV_ANIM_OFF);
     }
@@ -395,7 +395,9 @@ static lv_design_res_t lv_bar_design(lv_obj_t * bar, const lv_area_t * clip_area
             lv_draw_rect_dsc_init(&draw_dsc);
             draw_dsc.bg_opa = LV_OPA_TRANSP;
             draw_dsc.pattern_opa = LV_OPA_TRANSP;
+            draw_dsc.outline_opa = LV_OPA_TRANSP;
             draw_dsc.shadow_opa = LV_OPA_TRANSP;
+            draw_dsc.value_opa = LV_OPA_TRANSP;
             lv_obj_init_draw_rect_dsc(bar, LV_OBJ_PART_MAIN, &draw_dsc);
 
             lv_draw_rect(&bar->coords, clip_area, &draw_dsc);
@@ -414,6 +416,8 @@ static void draw_bg(lv_obj_t * bar, const lv_area_t * clip_area)
         draw_dsc.border_opa = LV_OPA_TRANSP;
     }
 
+    /*value will be drawn later*/
+    draw_dsc.value_opa = LV_OPA_TRANSP;
     lv_obj_init_draw_rect_dsc(bar, LV_BAR_PART_BG, &draw_dsc);
     lv_draw_rect(&bar->coords, clip_area, &draw_dsc);
 

src/lv_widgets/lv_btn.c

@@ -100,7 +100,7 @@ lv_obj_t * lv_btn_create(lv_obj_t * par, const lv_obj_t * copy)
         ext->checkable             = copy_ext->checkable;
 
         /*Refresh the style with new signal function*/
-        lv_obj_refresh_style(btn, LV_STYLE_PROP_ALL);
+        lv_obj_refresh_style(btn, LV_OBJ_PART_ALL, LV_STYLE_PROP_ALL);
     }
 
     LV_LOG_INFO("button created");

src/lv_widgets/lv_btnmatrix.c

@@ -20,6 +20,7 @@
  *      DEFINES
  *********************/
 #define LV_OBJX_NAME "lv_btnmatrix"
+#define BTN_EXTRA_CLICK_AREA_MAX (LV_DPI / 4)
 
 /**********************
  *      TYPEDEFS
@@ -659,6 +660,7 @@ static lv_design_res_t lv_btnmatrix_design(lv_obj_t * btnm, const lv_area_t * cl
         lv_draw_label_dsc_t draw_label_tmp_dsc;
 
         lv_state_t state_ori = btnm->state;
+        _lv_obj_disable_style_caching(btnm, true);
         btnm->state = LV_STATE_DEFAULT;
         lv_draw_rect_dsc_init(&draw_rect_rel_dsc);
         lv_draw_label_dsc_init(&draw_label_rel_dsc);
@@ -666,6 +668,7 @@ static lv_design_res_t lv_btnmatrix_design(lv_obj_t * btnm, const lv_area_t * cl
         lv_obj_init_draw_label_dsc(btnm, LV_BTNMATRIX_PART_BTN, &draw_label_rel_dsc);
         draw_label_rel_dsc.flag = txt_flag;
         btnm->state = state_ori;
+        _lv_obj_disable_style_caching(btnm, false);
 
         bool chk_inited = false;
         bool disabled_inited = false;
@@ -710,26 +713,30 @@ static lv_design_res_t lv_btnmatrix_design(lv_obj_t * btnm, const lv_area_t * cl
             else if(btn_state == LV_STATE_CHECKED) {
                 if(!chk_inited) {
                     btnm->state = LV_STATE_CHECKED;
+                    _lv_obj_disable_style_caching(btnm, true);
                     lv_draw_rect_dsc_init(&draw_rect_chk_dsc);
                     lv_draw_label_dsc_init(&draw_label_chk_dsc);
                     lv_obj_init_draw_rect_dsc(btnm, LV_BTNMATRIX_PART_BTN, &draw_rect_chk_dsc);
                     lv_obj_init_draw_label_dsc(btnm, LV_BTNMATRIX_PART_BTN, &draw_label_chk_dsc);
                     draw_label_chk_dsc.flag = txt_flag;
                     btnm->state = state_ori;
+                    _lv_obj_disable_style_caching(btnm, false);
                     chk_inited = true;
                 }
                 draw_rect_dsc_act = &draw_rect_chk_dsc;
                 draw_label_dsc_act = &draw_label_chk_dsc;
             }
-            else if(btn_state == LV_STATE_CHECKED) {
+            else if(btn_state == LV_STATE_DISABLED) {
                 if(!disabled_inited) {
                     btnm->state = LV_STATE_DISABLED;
+                    _lv_obj_disable_style_caching(btnm, true);
                     lv_draw_rect_dsc_init(&draw_rect_ina_dsc);
                     lv_draw_label_dsc_init(&draw_label_ina_dsc);
                     lv_obj_init_draw_rect_dsc(btnm, LV_BTNMATRIX_PART_BTN, &draw_rect_ina_dsc);
                     lv_obj_init_draw_label_dsc(btnm, LV_BTNMATRIX_PART_BTN, &draw_label_ina_dsc);
                     draw_label_ina_dsc.flag = txt_flag;
                     btnm->state = state_ori;
+                    _lv_obj_disable_style_caching(btnm, false);
                     disabled_inited = true;
                 }
                 draw_rect_dsc_act = &draw_rect_ina_dsc;
@@ -738,6 +745,7 @@ static lv_design_res_t lv_btnmatrix_design(lv_obj_t * btnm, const lv_area_t * cl
             /*In other cases get the styles directly without caching them*/
             else {
                 btnm->state = btn_state;
+                _lv_obj_disable_style_caching(btnm, true);
                 lv_draw_rect_dsc_init(&draw_rect_tmp_dsc);
                 lv_draw_label_dsc_init(&draw_label_tmp_dsc);
                 lv_obj_init_draw_rect_dsc(btnm, LV_BTNMATRIX_PART_BTN, &draw_rect_tmp_dsc);
@@ -745,8 +753,8 @@ static lv_design_res_t lv_btnmatrix_design(lv_obj_t * btnm, const lv_area_t * cl
                 draw_label_tmp_dsc.flag = txt_flag;
                 draw_rect_dsc_act = &draw_rect_tmp_dsc;
                 draw_label_dsc_act = &draw_label_tmp_dsc;
-
                 btnm->state = state_ori;
+                _lv_obj_disable_style_caching(btnm, false);
             }
 
             lv_style_int_t border_part_ori = draw_rect_dsc_act->border_side;
@@ -911,7 +919,7 @@ static lv_res_t lv_btnmatrix_signal(lv_obj_t * btnm, lv_signal_t sign, void * pa
             /*Toggle the button if enabled*/
             if(button_is_tgl_enabled(ext->ctrl_bits[ext->btn_id_pr]) &&
                !button_is_inactive(ext->ctrl_bits[ext->btn_id_pr])) {
-                if(button_get_tgl_state(ext->ctrl_bits[ext->btn_id_pr])) {
+                if(button_get_tgl_state(ext->ctrl_bits[ext->btn_id_pr]) && !ext->one_check) {
                     ext->ctrl_bits[ext->btn_id_pr] &= (~LV_BTNMATRIX_CTRL_CHECK_STATE);
                 }
                 else {
@@ -1203,18 +1211,25 @@ static uint16_t get_button_from_point(lv_obj_t * btnm, lv_point_t * p)
     /*Get the half inner padding. Button look larger with this value. (+1 for rounding error)*/
     pinner = (pinner / 2) + 1 + (pinner & 1);
 
+    pinner = LV_MATH_MIN(pinner, BTN_EXTRA_CLICK_AREA_MAX);
+    pright = LV_MATH_MIN(pright, BTN_EXTRA_CLICK_AREA_MAX);
+    ptop = LV_MATH_MIN(ptop, BTN_EXTRA_CLICK_AREA_MAX);
+    pbottom = LV_MATH_MIN(pbottom, BTN_EXTRA_CLICK_AREA_MAX);
+
     for(i = 0; i < ext->btn_cnt; i++) {
         lv_area_copy(&btn_area, &ext->button_areas[i]);
-        if(btn_area.x1 <= pleft) btn_area.x1 = btnm_cords.x1;
+        if(btn_area.x1 <= pleft) btn_area.x1 += btnm_cords.x1 - LV_MATH_MIN(pleft, BTN_EXTRA_CLICK_AREA_MAX);
         else btn_area.x1 += btnm_cords.x1 - pinner;
 
-        if(btn_area.y1 <= ptop) btn_area.y1 = btnm_cords.y1;
+        if(btn_area.y1 <= ptop) btn_area.y1 += btnm_cords.y1 - LV_MATH_MIN(ptop, BTN_EXTRA_CLICK_AREA_MAX);
         else btn_area.y1 += btnm_cords.y1 - pinner;
 
-        if(btn_area.x2 >= w - pright - 2) btn_area.x2 = btnm_cords.x2;  /*-2 for rounding error*/
+        if(btn_area.x2 >= w - pright - 2) btn_area.x2 += btnm_cords.x1 + LV_MATH_MIN(pright,
+                                                                                         BTN_EXTRA_CLICK_AREA_MAX);  /*-2 for rounding error*/
         else btn_area.x2 += btnm_cords.x1 + pinner;
 
-        if(btn_area.y2 >= h - pbottom - 2) btn_area.y2 = btnm_cords.y2; /*-2 for rounding error*/
+        if(btn_area.y2 >= h - pbottom - 2) btn_area.y2 += btnm_cords.y1 + LV_MATH_MIN(pbottom,
+                                                                                          BTN_EXTRA_CLICK_AREA_MAX); /*-2 for rounding error*/
         else btn_area.y2 += btnm_cords.y1 + pinner;
 
         if(_lv_area_is_point_on(&btn_area, p, 0) != false) {

src/lv_widgets/lv_calendar.c

@@ -705,6 +705,7 @@ static void draw_header(lv_obj_t * calendar, const lv_area_t * mask)
     strcpy(&txt_buf[5], get_month_name(calendar, ext->showed_date.month));
 
     calendar->state = LV_STATE_DEFAULT;
+    _lv_obj_disable_style_caching(calendar, true);
 
     lv_draw_label_dsc_t label_dsc;
     lv_draw_label_dsc_init(&label_dsc);
@@ -738,6 +739,7 @@ static void draw_header(lv_obj_t * calendar, const lv_area_t * mask)
     lv_draw_label(&header_area, mask, &label_dsc, LV_SYMBOL_RIGHT, NULL);
 
     calendar->state = state_ori;    /*Restore the state*/
+    _lv_obj_disable_style_caching(calendar, false);
 }
 
 /**
@@ -810,6 +812,7 @@ static void draw_dates(lv_obj_t * calendar, const lv_area_t * clip_area)
     /*The state changes without re-caching the styles, disable the use of cache*/
     lv_state_t state_ori = calendar->state;
     calendar->state = LV_STATE_DEFAULT;
+    _lv_obj_disable_style_caching(calendar, true);
 
     lv_state_t month_state = LV_STATE_DISABLED;
 
@@ -856,6 +859,7 @@ static void draw_dates(lv_obj_t * calendar, const lv_area_t * clip_area)
 
         if(box_area.y1 > clip_area->y2) {
             calendar->state = state_ori;
+            _lv_obj_disable_style_caching(calendar, false);
             return;
         }
 
@@ -926,6 +930,7 @@ static void draw_dates(lv_obj_t * calendar, const lv_area_t * clip_area)
         }
     }
     calendar->state = state_ori;
+    _lv_obj_disable_style_caching(calendar, false);
 
 
 }

src/lv_widgets/lv_canvas.c

@@ -657,6 +657,7 @@ void lv_canvas_blur_ver(lv_obj_t * canvas, const lv_area_t * area, uint16_t r)
  * Fill the canvas with color
  * @param canvas pointer to a canvas
  * @param color the background color
+ * @param opa the desired opacity
  */
 void lv_canvas_fill_bg(lv_obj_t * canvas, lv_color_t color, lv_opa_t opa)
 {
@@ -694,10 +695,10 @@ void lv_canvas_fill_bg(lv_obj_t * canvas, lv_color_t color, lv_opa_t opa)
  * @param y top coordinate of the rectangle
  * @param w width of the rectangle
  * @param h height of the rectangle
- * @param style style of the rectangle (`body` properties are used except `padding`)
+ * @param rect_dsc descriptor of the rectangle
  */
 void lv_canvas_draw_rect(lv_obj_t * canvas, lv_coord_t x, lv_coord_t y, lv_coord_t w, lv_coord_t h,
-                         lv_draw_rect_dsc_t * rect_dsc)
+                         const lv_draw_rect_dsc_t * rect_dsc)
 {
     LV_ASSERT_OBJ(canvas, LV_OBJX_NAME);
 
@@ -763,7 +764,7 @@ void lv_canvas_draw_rect(lv_obj_t * canvas, lv_coord_t x, lv_coord_t y, lv_coord
  * @param x left coordinate of the text
  * @param y top coordinate of the text
  * @param max_w max width of the text. The text will be wrapped to fit into this size
- * @param style style of the text (`text` properties are used)
+ * @param label_draw_dsc pointer to a valid label descriptor `lv_draw_label_dsc_t`
  * @param txt text to display
  * @param align align of the text (`LV_LABEL_ALIGN_LEFT/RIGHT/CENTER`)
  */
@@ -841,10 +842,10 @@ void lv_canvas_draw_text(lv_obj_t * canvas, lv_coord_t x, lv_coord_t y, lv_coord
  * Draw an image on the canvas
  * @param canvas pointer to a canvas object
  * @param src image source. Can be a pointer an `lv_img_dsc_t` variable or a path an image.
- * @param style style of the image (`image` properties are used)
+ * @param img_draw_dsc pointer to a valid label descriptor `lv_draw_img_dsc_t`
  */
 void lv_canvas_draw_img(lv_obj_t * canvas, lv_coord_t x, lv_coord_t y, const void * src,
-                        lv_draw_img_dsc_t * img_draw_dsc)
+                        const lv_draw_img_dsc_t * img_draw_dsc)
 {
     LV_ASSERT_OBJ(canvas, LV_OBJX_NAME);
 
@@ -906,10 +907,10 @@ void lv_canvas_draw_img(lv_obj_t * canvas, lv_coord_t x, lv_coord_t y, const voi
  * @param canvas pointer to a canvas object
  * @param points point of the line
  * @param point_cnt number of points
- * @param style style of the line (`line` properties are used)
+ * @param line_draw_dsc pointer to an initialized `lv_draw_line_dsc_t` variable
  */
 void lv_canvas_draw_line(lv_obj_t * canvas, const lv_point_t points[], uint32_t point_cnt,
-                         lv_draw_line_dsc_t * line_draw_dsc)
+                         const lv_draw_line_dsc_t * line_draw_dsc)
 {
     LV_ASSERT_OBJ(canvas, LV_OBJX_NAME);
 
@@ -969,10 +970,10 @@ void lv_canvas_draw_line(lv_obj_t * canvas, const lv_point_t points[], uint32_t
  * @param canvas pointer to a canvas object
  * @param points point of the polygon
  * @param point_cnt number of points
- * @param style style of the polygon (`body.main_color` and `body.opa` is used)
+ * @param poly_draw_dsc pointer to an initialized `lv_draw_rect_dsc_t` variable
  */
 void lv_canvas_draw_polygon(lv_obj_t * canvas, const lv_point_t points[], uint32_t point_cnt,
-                            lv_draw_rect_dsc_t * poly_draw_dsc)
+                            const lv_draw_rect_dsc_t * poly_draw_dsc)
 {
     LV_ASSERT_OBJ(canvas, LV_OBJX_NAME);
 
@@ -1033,10 +1034,10 @@ void lv_canvas_draw_polygon(lv_obj_t * canvas, const lv_point_t points[], uint32
  * @param r radius of the arc
  * @param start_angle start angle in degrees
  * @param end_angle end angle in degrees
- * @param style style of the polygon (`body.main_color` and `body.opa` is used)
+ * @param arc_draw_dsc pointer to an initialized `lv_draw_line_dsc_t` variable
  */
 void lv_canvas_draw_arc(lv_obj_t * canvas, lv_coord_t x, lv_coord_t y, lv_coord_t r, int32_t start_angle,
-                        int32_t end_angle, lv_draw_line_dsc_t * arc_draw_dsc)
+                        int32_t end_angle, const lv_draw_line_dsc_t * arc_draw_dsc)
 {
     LV_ASSERT_OBJ(canvas, LV_OBJX_NAME);
 

src/lv_widgets/lv_canvas.h

@@ -153,6 +153,7 @@ void lv_canvas_transform(lv_obj_t * canvas, lv_img_dsc_t * img, int16_t angle, u
 /**
  * Apply horizontal blur on the canvas
  * @param canvas pointer to a canvas object
+ * @param area the area to blur. If `NULL` the whole canvas will be blurred.
  * @param r radius of the blur
  */
 void lv_canvas_blur_hor(lv_obj_t * canvas, const lv_area_t * area, uint16_t r);
@@ -169,6 +170,7 @@ void lv_canvas_blur_ver(lv_obj_t * canvas, const lv_area_t * area, uint16_t r);
  * Fill the canvas with color
  * @param canvas pointer to a canvas
  * @param color the background color
+ * @param opa the desired opacity
  */
 void lv_canvas_fill_bg(lv_obj_t * canvas, lv_color_t color, lv_opa_t opa);
 
@@ -179,10 +181,10 @@ void lv_canvas_fill_bg(lv_obj_t * canvas, lv_color_t color, lv_opa_t opa);
  * @param y top coordinate of the rectangle
  * @param w width of the rectangle
  * @param h height of the rectangle
- * @param style style of the rectangle (`body` properties are used except `padding`)
+ * @param rect_dsc descriptor of the rectangle
  */
 void lv_canvas_draw_rect(lv_obj_t * canvas, lv_coord_t x, lv_coord_t y, lv_coord_t w, lv_coord_t h,
-                         lv_draw_rect_dsc_t * rect_dsc);
+                         const lv_draw_rect_dsc_t * rect_dsc);
 
 /**
  * Draw a text on the canvas.
@@ -190,7 +192,7 @@ void lv_canvas_draw_rect(lv_obj_t * canvas, lv_coord_t x, lv_coord_t y, lv_coord
  * @param x left coordinate of the text
  * @param y top coordinate of the text
  * @param max_w max width of the text. The text will be wrapped to fit into this size
- * @param style style of the text (`text` properties are used)
+ * @param label_draw_dsc pointer to a valid label descriptor `lv_draw_label_dsc_t`
  * @param txt text to display
  * @param align align of the text (`LV_LABEL_ALIGN_LEFT/RIGHT/CENTER`)
  */
@@ -201,31 +203,33 @@ void lv_canvas_draw_text(lv_obj_t * canvas, lv_coord_t x, lv_coord_t y, lv_coord
 /**
  * Draw an image on the canvas
  * @param canvas pointer to a canvas object
+ * @param x left coordinate of the image
+ * @param y top coordinate of the image
  * @param src image source. Can be a pointer an `lv_img_dsc_t` variable or a path an image.
- * @param style style of the image (`image` properties are used)
+ * @param img_draw_dsc pointer to a valid label descriptor `lv_draw_img_dsc_t`
  */
 void lv_canvas_draw_img(lv_obj_t * canvas, lv_coord_t x, lv_coord_t y, const void * src,
-                        lv_draw_img_dsc_t * img_draw_dsc);
+                        const lv_draw_img_dsc_t * img_draw_dsc);
 
 /**
  * Draw a line on the canvas
  * @param canvas pointer to a canvas object
  * @param points point of the line
  * @param point_cnt number of points
- * @param style style of the line (`line` properties are used)
+ * @param line_draw_dsc pointer to an initialized `lv_draw_line_dsc_t` variable
  */
 void lv_canvas_draw_line(lv_obj_t * canvas, const lv_point_t points[], uint32_t point_cnt,
-                         lv_draw_line_dsc_t * line_draw_dsc);
+                         const lv_draw_line_dsc_t * line_draw_dsc);
 
 /**
  * Draw a polygon on the canvas
  * @param canvas pointer to a canvas object
  * @param points point of the polygon
  * @param point_cnt number of points
- * @param style style of the polygon (`body.main_color` and `body.opa` is used)
+ * @param poly_draw_dsc pointer to an initialized `lv_draw_rect_dsc_t` variable
  */
 void lv_canvas_draw_polygon(lv_obj_t * canvas, const lv_point_t points[], uint32_t point_cnt,
-                            lv_draw_rect_dsc_t * poly_draw_dsc);
+                            const lv_draw_rect_dsc_t * poly_draw_dsc);
 
 /**
  * Draw an arc on the canvas
@@ -235,10 +239,10 @@ void lv_canvas_draw_polygon(lv_obj_t * canvas, const lv_point_t points[], uint32
  * @param r radius of the arc
  * @param start_angle start angle in degrees
  * @param end_angle end angle in degrees
- * @param style style of the polygon (`body.main_color` and `body.opa` is used)
+ * @param arc_draw_dsc pointer to an initialized `lv_draw_line_dsc_t` variable
  */
 void lv_canvas_draw_arc(lv_obj_t * canvas, lv_coord_t x, lv_coord_t y, lv_coord_t r, int32_t start_angle,
-                        int32_t end_angle, lv_draw_line_dsc_t * arc_draw_dsc);
+                        int32_t end_angle, const lv_draw_line_dsc_t * arc_draw_dsc);
 
 /**********************
  *      MACROS

src/lv_widgets/lv_chart.c

@@ -152,7 +152,7 @@ lv_obj_t * lv_chart_create(lv_obj_t * par, const lv_obj_t * copy)
         _lv_memcpy(&ext->secondary_y_axis, &ext_copy->secondary_y_axis, sizeof(lv_chart_axis_cfg_t));
 
         /*Refresh the style with new signal function*/
-        lv_obj_refresh_style(chart, LV_STYLE_PROP_ALL);
+        lv_obj_refresh_style(chart, LV_OBJ_PART_ALL, LV_STYLE_PROP_ALL);
     }
 
     LV_LOG_INFO("chart created");
@@ -207,23 +207,23 @@ lv_chart_series_t * lv_chart_add_series(lv_obj_t * chart, lv_color_t color)
 /**
  * Clear the point of a series
  * @param chart pointer to a chart object
- * @param serie pointer to the chart's series to clear
+ * @param series pointer to the chart's series to clear
  */
-void lv_chart_clear_serie(lv_obj_t * chart, lv_chart_series_t * serie)
+void lv_chart_clear_series(lv_obj_t * chart, lv_chart_series_t * series)
 {
     LV_ASSERT_OBJ(chart, LV_OBJX_NAME);
-    LV_ASSERT_NULL(serie);
+    LV_ASSERT_NULL(series);
 
-    if(chart == NULL || serie == NULL) return;
+    if(chart == NULL || series == NULL) return;
     lv_chart_ext_t * ext = lv_obj_get_ext_attr(chart);
     if(ext == NULL) return;
 
     uint32_t i;
     for(i = 0; i < ext->point_cnt; i++) {
-        serie->points[i] = LV_CHART_POINT_DEF;
+        series->points[i] = LV_CHART_POINT_DEF;
     }
 
-    serie->start_point = 0;
+    series->start_point = 0;
 }
 
 /*=====================

src/lv_widgets/lv_chart.h

@@ -139,9 +139,9 @@ lv_chart_series_t * lv_chart_add_series(lv_obj_t * chart, lv_color_t color);
 /**
  * Clear the point of a series
  * @param chart pointer to a chart object
- * @param serie pointer to the chart's series to clear
+ * @param series pointer to the chart's series to clear
  */
-void lv_chart_clear_serie(lv_obj_t * chart, lv_chart_series_t * serie);
+void lv_chart_clear_series(lv_obj_t * chart, lv_chart_series_t * series);
 
 /*=====================
  * Setter functions

src/lv_widgets/lv_cont.c

@@ -112,7 +112,7 @@ lv_obj_t * lv_cont_create(lv_obj_t * par, const lv_obj_t * copy)
         ext->layout              = copy_ext->layout;
 
         /*Refresh the style with new signal function*/
-        lv_obj_refresh_style(cont, LV_STYLE_PROP_ALL);
+        lv_obj_refresh_style(cont, LV_OBJ_PART_ALL, LV_STYLE_PROP_ALL);
     }
 
     LV_LOG_INFO("container created");

src/lv_widgets/lv_cpicker.c

@@ -151,7 +151,7 @@ lv_obj_t * lv_cpicker_create(lv_obj_t * par, const lv_obj_t * copy)
 
         lv_style_list_copy(&ext->knob.style_list, &copy_ext->knob.style_list);
         /*Refresh the style with new signal function*/
-        lv_obj_refresh_style(cpicker, LV_STYLE_PROP_ALL);
+        lv_obj_refresh_style(cpicker, LV_OBJ_PART_ALL, LV_STYLE_PROP_ALL);
     }
     refr_knob_pos(cpicker);
 
@@ -244,9 +244,7 @@ bool lv_cpicker_set_hsv(lv_obj_t * cpicker, lv_color_hsv_t hsv)
 
     refr_knob_pos(cpicker);
 
-    if(ext->type == LV_CPICKER_TYPE_DISC) {
+    lv_obj_invalidate(cpicker);
-        lv_obj_invalidate(cpicker);
-    }
 
     return true;
 }

src/lv_widgets/lv_dropdown.c

@@ -609,7 +609,7 @@ void lv_dropdown_open(lv_obj_t * ddlist)
     lv_style_list_copy(lv_obj_get_style_list(ext->page, LV_PAGE_PART_BG), &ext->style_page);
     lv_style_list_copy(lv_obj_get_style_list(ext->page, LV_PAGE_PART_SCROLLBAR), &ext->style_scrlbar);
     lv_obj_clean_style_list(ext->page, LV_PAGE_PART_SCROLLABLE);
-    lv_obj_refresh_style(ext->page, LV_STYLE_PROP_ALL);
+    lv_obj_refresh_style(ext->page, LV_OBJ_PART_ALL, LV_STYLE_PROP_ALL);
 
     lv_obj_t * label = lv_label_create(ext->page, NULL);
     lv_label_set_text_static(label, ext->options);
@@ -965,7 +965,7 @@ static lv_res_t lv_dropdown_signal(lv_obj_t * ddlist, lv_signal_t sign, void * p
         const lv_font_t * font = lv_obj_get_style_text_font(ddlist, LV_DROPDOWN_PART_MAIN);
         lv_obj_set_height(ddlist, top + bottom + lv_font_get_line_height(font));
 
-        if(ext->page) lv_obj_refresh_style(ext->page, LV_STYLE_PROP_ALL);
+        if(ext->page) lv_obj_refresh_style(ext->page, LV_OBJ_PART_ALL, LV_STYLE_PROP_ALL);
     }
     else if(sign == LV_SIGNAL_CONTROL) {
 #if LV_USE_GROUP
@@ -1134,8 +1134,10 @@ static void draw_box(lv_obj_t * ddlist, const lv_area_t * clip_area, uint16_t id
     lv_obj_t * page = ext->page;
     lv_state_t state_orig = page->state;
 
-    page->state = LV_STATE_DEFAULT;
+    if(state != page->state) {
-    page->state |= state;
+        _lv_obj_disable_style_caching(ddlist, true);
+        page->state = state;
+    }
 
     /*Draw a rectangle under the selected item*/
     const lv_font_t * font    = lv_obj_get_style_text_font(ddlist, LV_DROPDOWN_PART_LIST);
@@ -1159,6 +1161,7 @@ static void draw_box(lv_obj_t * ddlist, const lv_area_t * clip_area, uint16_t id
     lv_draw_rect(&rect_area, clip_area, &sel_rect);
 
     page->state = state_orig;
+    _lv_obj_disable_style_caching(ddlist, false);
 }
 
 
@@ -1169,8 +1172,10 @@ static void draw_box_label(lv_obj_t * ddlist, const lv_area_t * clip_area, uint1
     lv_obj_t * page = ext->page;
     lv_state_t state_orig = page->state;
 
-    page->state = LV_STATE_DEFAULT;
+    if(state != page->state) {
-    page->state |= state;
+        page->state =  state;
+        _lv_obj_disable_style_caching(ddlist, true);
+    }
 
     lv_draw_label_dsc_t label_dsc;
     lv_draw_label_dsc_init(&label_dsc);
@@ -1204,6 +1209,7 @@ static void draw_box_label(lv_obj_t * ddlist, const lv_area_t * clip_area, uint1
         lv_draw_label(&label->coords, &mask_sel, &label_dsc, lv_label_get_text(label), NULL);
     }
     page->state = state_orig;
+    _lv_obj_disable_style_caching(ddlist, false);
 }
 
 /**

src/lv_widgets/lv_gauge.c

@@ -124,7 +124,7 @@ lv_obj_t * lv_gauge_create(lv_obj_t * par, const lv_obj_t * copy)
         ext->format_cb   = copy_ext->format_cb;
 
         /*Refresh the style with new signal function*/
-        lv_obj_refresh_style(gauge, LV_STYLE_PROP_ALL);
+        lv_obj_refresh_style(gauge, LV_OBJ_PART_ALL, LV_STYLE_PROP_ALL);
     }
 
     LV_LOG_INFO("gauge created");

src/lv_widgets/lv_img.c

@@ -121,7 +121,7 @@ lv_obj_t * lv_img_create(lv_obj_t * par, const lv_obj_t * copy)
         lv_img_set_src(img, copy_ext->src);
 
         /*Refresh the style with new signal function*/
-        lv_obj_refresh_style(img, LV_STYLE_PROP_ALL);
+        lv_obj_refresh_style(img, LV_OBJ_PART_ALL, LV_STYLE_PROP_ALL);
     }
 
     LV_LOG_INFO("image created");
@@ -303,8 +303,10 @@ void lv_img_set_pivot(lv_obj_t * img, lv_coord_t pivot_x, lv_coord_t pivot_y)
     lv_style_int_t transf_angle = lv_obj_get_style_transform_angle(img, LV_IMG_PART_MAIN);
     transf_angle += ext->angle;
 
+    lv_coord_t w = lv_obj_get_width(img);
+    lv_coord_t h = lv_obj_get_height(img);
     lv_area_t a;
-    _lv_img_buf_get_transformed_area(&a, ext->w, ext->h, transf_angle, transf_zoom, &ext->pivot);
+    _lv_img_buf_get_transformed_area(&a, w, h, transf_angle, transf_zoom, &ext->pivot);
     a.x1 += img->coords.x1;
     a.y1 += img->coords.y1;
     a.x2 += img->coords.x1;
@@ -315,7 +317,7 @@ void lv_img_set_pivot(lv_obj_t * img, lv_coord_t pivot_x, lv_coord_t pivot_y)
     ext->pivot.y = pivot_y;
     lv_obj_refresh_ext_draw_pad(img);
 
-    _lv_img_buf_get_transformed_area(&a, ext->w, ext->h, transf_angle, transf_zoom, &ext->pivot);
+    _lv_img_buf_get_transformed_area(&a, w, h, transf_angle, transf_zoom, &ext->pivot);
     a.x1 += img->coords.x1;
     a.y1 += img->coords.y1;
     a.x2 += img->coords.x1;
@@ -341,8 +343,10 @@ void lv_img_set_angle(lv_obj_t * img, int16_t angle)
 
     lv_style_int_t transf_angle = lv_obj_get_style_transform_angle(img, LV_IMG_PART_MAIN);
 
+    lv_coord_t w = lv_obj_get_width(img);
+    lv_coord_t h = lv_obj_get_height(img);
     lv_area_t a;
-    _lv_img_buf_get_transformed_area(&a, ext->w, ext->h, transf_angle + ext->angle, transf_zoom, &ext->pivot);
+    _lv_img_buf_get_transformed_area(&a, w, h, transf_angle + ext->angle, transf_zoom, &ext->pivot);
     a.x1 += img->coords.x1;
     a.y1 += img->coords.y1;
     a.x2 += img->coords.x1;
@@ -352,7 +356,7 @@ void lv_img_set_angle(lv_obj_t * img, int16_t angle)
     ext->angle = angle;
     lv_obj_refresh_ext_draw_pad(img);
 
-    _lv_img_buf_get_transformed_area(&a, ext->w, ext->h, transf_angle + ext->angle, transf_zoom, &ext->pivot);
+    _lv_img_buf_get_transformed_area(&a, w, h, transf_angle + ext->angle, transf_zoom, &ext->pivot);
     a.x1 += img->coords.x1;
     a.y1 += img->coords.y1;
     a.x2 += img->coords.x1;
@@ -382,8 +386,10 @@ void lv_img_set_zoom(lv_obj_t * img, uint16_t zoom)
     lv_style_int_t transf_angle = lv_obj_get_style_transform_angle(img, LV_IMG_PART_MAIN);
     transf_angle += ext->angle;
 
+    lv_coord_t w = lv_obj_get_width(img);
+    lv_coord_t h = lv_obj_get_height(img);
     lv_area_t a;
-    _lv_img_buf_get_transformed_area(&a, ext->w, ext->h, transf_angle, (transf_zoom * ext->zoom) >> 8, &ext->pivot);
+    _lv_img_buf_get_transformed_area(&a, w, h, transf_angle, (transf_zoom * ext->zoom) >> 8, &ext->pivot);
     a.x1 += img->coords.x1;
     a.y1 += img->coords.y1;
     a.x2 += img->coords.x1;
@@ -393,7 +399,7 @@ void lv_img_set_zoom(lv_obj_t * img, uint16_t zoom)
     ext->zoom = zoom;
     lv_obj_refresh_ext_draw_pad(img);
 
-    _lv_img_buf_get_transformed_area(&a, ext->w, ext->h, transf_angle, (transf_zoom * ext->zoom) >> 8, &ext->pivot);
+    _lv_img_buf_get_transformed_area(&a, w, h, transf_angle, (transf_zoom * ext->zoom) >> 8, &ext->pivot);
     a.x1 += img->coords.x1;
     a.y1 += img->coords.y1;
     a.x2 += img->coords.x1;
@@ -567,7 +573,6 @@ static lv_design_res_t lv_img_design(lv_obj_t * img, const lv_area_t * clip_area
     lv_img_ext_t * ext       = lv_obj_get_ext_attr(img);
 
     if(mode == LV_DESIGN_COVER_CHK) {
-
         if(lv_obj_get_style_clip_corner(img, LV_IMG_PART_MAIN)) return LV_DESIGN_RES_MASKED;
 
         if(ext->src_type == LV_IMG_SRC_UNKNOWN || ext->src_type == LV_IMG_SRC_SYMBOL) return LV_DESIGN_RES_NOT_COVER;
@@ -578,12 +583,12 @@ static lv_design_res_t lv_img_design(lv_obj_t * img, const lv_area_t * clip_area
         int32_t angle_final = lv_obj_get_style_transform_angle(img, LV_IMG_PART_MAIN);
         angle_final += ext->angle;
 
-        if(angle_final == 0) return LV_DESIGN_RES_NOT_COVER;
+        if(angle_final != 0) return LV_DESIGN_RES_NOT_COVER;
 
         int32_t zoom_final = lv_obj_get_style_transform_zoom(img, LV_IMG_PART_MAIN);
         zoom_final = (zoom_final * ext->zoom) >> 8;
 
-        if(zoom_final != LV_IMG_ZOOM_NONE) {
+        if(zoom_final == LV_IMG_ZOOM_NONE) {
             if(_lv_area_is_in(clip_area, &img->coords, 0) == false) return LV_DESIGN_RES_NOT_COVER;
         }
         else {
@@ -603,9 +608,6 @@ static lv_design_res_t lv_img_design(lv_obj_t * img, const lv_area_t * clip_area
     }
     else if(mode == LV_DESIGN_DRAW_MAIN) {
         if(ext->h == 0 || ext->w == 0) return true;
-        lv_area_t img_coords;
-
-        lv_obj_get_coords(img, &img_coords);
 
         lv_draw_rect_dsc_t bg_dsc;
         lv_draw_rect_dsc_init(&bg_dsc);
@@ -620,18 +622,19 @@ static lv_design_res_t lv_img_design(lv_obj_t * img, const lv_area_t * clip_area
         int32_t zoom_final = lv_obj_get_style_transform_zoom(img, LV_IMG_PART_MAIN);
         zoom_final = (zoom_final * ext->zoom) >> 8;
 
-        if(zoom_final == 0) return LV_DESIGN_RES_OK;
-
         int32_t angle_final = lv_obj_get_style_transform_angle(img, LV_IMG_PART_MAIN);
         angle_final += ext->angle;
 
+        lv_coord_t obj_w = lv_obj_get_width(img);
+        lv_coord_t obj_h = lv_obj_get_height(img);
+
         lv_area_t bg_coords;
-        _lv_img_buf_get_transformed_area(&bg_coords, lv_area_get_width(&img_coords), lv_area_get_height(&img_coords),
+        _lv_img_buf_get_transformed_area(&bg_coords, obj_w, obj_h,
                                          angle_final, zoom_final, &ext->pivot);
-        bg_coords.x1 += img_coords.x1;
+        bg_coords.x1 += img->coords.x1;
-        bg_coords.y1 += img_coords.y1;
+        bg_coords.y1 += img->coords.y1;
-        bg_coords.x2 += img_coords.x1;
+        bg_coords.x2 += img->coords.x1;
-        bg_coords.y2 += img_coords.y1;
+        bg_coords.y2 += img->coords.y1;
         bg_coords.x1 -= lv_obj_get_style_pad_left(img, LV_IMG_PART_MAIN);
         bg_coords.x2 += lv_obj_get_style_pad_right(img, LV_IMG_PART_MAIN);
         bg_coords.y1 -= lv_obj_get_style_pad_top(img, LV_IMG_PART_MAIN);
@@ -639,6 +642,8 @@ static lv_design_res_t lv_img_design(lv_obj_t * img, const lv_area_t * clip_area
 
         lv_draw_rect(&bg_coords, clip_area, &bg_dsc);
 
+        if(zoom_final == 0) return LV_DESIGN_RES_OK;
+
         if(lv_obj_get_style_clip_corner(img, LV_OBJ_PART_MAIN)) {
             lv_draw_mask_radius_param_t * mp = _lv_mem_buf_get(sizeof(lv_draw_mask_radius_param_t));
 
@@ -650,12 +655,6 @@ static lv_design_res_t lv_img_design(lv_obj_t * img, const lv_area_t * clip_area
         }
 
         if(ext->src_type == LV_IMG_SRC_FILE || ext->src_type == LV_IMG_SRC_VARIABLE) {
-            img_coords.x1 += ext->offset.x;
-            img_coords.y1 += ext->offset.y;
-
-            if(img_coords.x1 > img->coords.x1) img_coords.x1 -= ext->w;
-            if(img_coords.y1 > img->coords.y1) img_coords.y1 -= ext->h;
-
             LV_LOG_TRACE("lv_img_design: start to draw image");
 
             lv_draw_img_dsc_t img_dsc;
@@ -672,15 +671,37 @@ static lv_design_res_t lv_img_design(lv_obj_t * img, const lv_area_t * clip_area
             img_dsc.pivot.y = ext->pivot.y;
             img_dsc.antialias = ext->antialias;
 
-            lv_area_t cords_tmp;
+            lv_coord_t zoomed_src_w = (int32_t)((int32_t)ext->w * zoom_final) >> 8;
-            cords_tmp.y1 = img_coords.y1;
+            lv_coord_t zoomed_src_h = (int32_t)((int32_t)ext->h * zoom_final) >> 8;
-            cords_tmp.y2 = img_coords.y1 + ext->h - 1;
+            lv_area_t zommed_coords;
+            lv_obj_get_coords(img, &zommed_coords);
 
-            for(; cords_tmp.y1 <= img_coords.y2; cords_tmp.y1 += ext->h, cords_tmp.y2 += ext->h) {
+            zommed_coords.x1 += (int32_t)((int32_t)ext->offset.x * zoom_final) >> 8;
-                cords_tmp.x1 = img_coords.x1;
+            zommed_coords.y1 += (int32_t)((int32_t)ext->offset.y * zoom_final) >> 8;
-                cords_tmp.x2 = img_coords.x1 + ext->w - 1;
+            zommed_coords.x2 = zommed_coords.x1 + ((int32_t)((int32_t)(obj_w - 1) * zoom_final) >> 8);
-                for(; cords_tmp.x1 <= img_coords.x2; cords_tmp.x1 += ext->w, cords_tmp.x2 += ext->w) {
+            zommed_coords.y2 = zommed_coords.y1 + ((int32_t)((int32_t)(obj_h - 1) * zoom_final) >> 8);
-                    lv_draw_img(&cords_tmp, clip_area, ext->src, &img_dsc);
+
+            if(zommed_coords.x1 > img->coords.x1) zommed_coords.x1 -= ext->w;
+            if(zommed_coords.y1 > img->coords.y1) zommed_coords.y1 -= ext->h;
+
+            lv_area_t clip_real;
+            _lv_img_buf_get_transformed_area(&clip_real, lv_obj_get_width(img), lv_obj_get_height(img), angle_final, zoom_final, &ext->pivot);
+            clip_real.x1 += img->coords.x1;
+            clip_real.x2 += img->coords.x1;
+            clip_real.y1 += img->coords.y1;
+            clip_real.y2 += img->coords.y1;
+
+            if(_lv_area_intersect(&clip_real, &clip_real, clip_area) == false) return LV_DESIGN_RES_OK;
+
+            lv_area_t coords_tmp;
+            coords_tmp.y1 = zommed_coords.y1;
+            coords_tmp.y2 = zommed_coords.y1 + ext->h - 1;
+
+            for(; coords_tmp.y1 <= zommed_coords.y2; coords_tmp.y1 += zoomed_src_h, coords_tmp.y2 += zoomed_src_h) {
+                coords_tmp.x1 = zommed_coords.x1;
+                coords_tmp.x2 = zommed_coords.x1 + ext->w - 1;
+                for(; coords_tmp.x1 <= zommed_coords.x2; coords_tmp.x1 += zoomed_src_w, coords_tmp.x2 += zoomed_src_w) {
+                    lv_draw_img(&coords_tmp, &clip_real, ext->src, &img_dsc);
                 }
             }
         }
@@ -691,7 +712,7 @@ static lv_design_res_t lv_img_design(lv_obj_t * img, const lv_area_t * clip_area
             lv_obj_init_draw_label_dsc(img, LV_IMG_PART_MAIN, &label_dsc);
 
             label_dsc.color = lv_obj_get_style_image_recolor(img, LV_IMG_PART_MAIN);
-            lv_draw_label(&img_coords, clip_area, &label_dsc, ext->src, NULL);
+            lv_draw_label(&img->coords, clip_area, &label_dsc, ext->src, NULL);
         }
         else {
             /*Trigger the error handler of image drawer*/
@@ -705,15 +726,33 @@ static lv_design_res_t lv_img_design(lv_obj_t * img, const lv_area_t * clip_area
             _lv_mem_buf_release(param);
         }
 
-        lv_draw_rect_dsc_t draw_dsc;
-        lv_draw_rect_dsc_init(&draw_dsc);
-
         /*If the border is drawn later disable loading other properties*/
         if(lv_obj_get_style_border_post(img, LV_OBJ_PART_MAIN)) {
+            lv_draw_rect_dsc_t draw_dsc;
+            lv_draw_rect_dsc_init(&draw_dsc);
             draw_dsc.bg_opa = LV_OPA_TRANSP;
             draw_dsc.pattern_opa = LV_OPA_TRANSP;
             draw_dsc.shadow_opa = LV_OPA_TRANSP;
             lv_obj_init_draw_rect_dsc(img, LV_OBJ_PART_MAIN, &draw_dsc);
+
+            int32_t zoom_final = lv_obj_get_style_transform_zoom(img, LV_IMG_PART_MAIN);
+            zoom_final = (zoom_final * ext->zoom) >> 8;
+
+            int32_t angle_final = lv_obj_get_style_transform_angle(img, LV_IMG_PART_MAIN);
+            angle_final += ext->angle;
+
+            lv_area_t bg_coords;
+            _lv_img_buf_get_transformed_area(&bg_coords, lv_area_get_width(&img->coords), lv_area_get_height(&img->coords),
+                                             angle_final, zoom_final, &ext->pivot);
+            bg_coords.x1 += img->coords.x1;
+            bg_coords.y1 += img->coords.y1;
+            bg_coords.x2 += img->coords.x1;
+            bg_coords.y2 += img->coords.y1;
+            bg_coords.x1 -= lv_obj_get_style_pad_left(img, LV_IMG_PART_MAIN);
+            bg_coords.x2 += lv_obj_get_style_pad_right(img, LV_IMG_PART_MAIN);
+            bg_coords.y1 -= lv_obj_get_style_pad_top(img, LV_IMG_PART_MAIN);
+            bg_coords.y2 += lv_obj_get_style_pad_bottom(img, LV_IMG_PART_MAIN);
+
             lv_draw_rect(&img->coords, clip_area, &draw_dsc);
         }
     }
@@ -770,12 +809,14 @@ static lv_res_t lv_img_signal(lv_obj_t * img, lv_signal_t sign, void * param)
         /*If the image has angle provide enough room for the rotated corners */
         if(transf_angle || transf_zoom != LV_IMG_ZOOM_NONE) {
             lv_area_t a;
-            _lv_img_buf_get_transformed_area(&a, ext->w, ext->h, transf_angle, transf_zoom, &ext->pivot);
+            lv_coord_t w = lv_obj_get_width(img);
+            lv_coord_t h = lv_obj_get_height(img);
+            _lv_img_buf_get_transformed_area(&a, w, h, transf_angle, transf_zoom, &ext->pivot);
             lv_coord_t pad_ori = img->ext_draw_pad;
             img->ext_draw_pad = LV_MATH_MAX(img->ext_draw_pad, pad_ori - a.x1);
             img->ext_draw_pad = LV_MATH_MAX(img->ext_draw_pad, pad_ori - a.y1);
-            img->ext_draw_pad = LV_MATH_MAX(img->ext_draw_pad, pad_ori + a.x2 - ext->w);
+            img->ext_draw_pad = LV_MATH_MAX(img->ext_draw_pad, pad_ori + a.x2 - w);
-            img->ext_draw_pad = LV_MATH_MAX(img->ext_draw_pad, pad_ori + a.y2 - ext->h);
+            img->ext_draw_pad = LV_MATH_MAX(img->ext_draw_pad, pad_ori + a.y2 - h);
         }
 
         /*Handle the padding of the background*/
@@ -804,8 +845,10 @@ static lv_res_t lv_img_signal(lv_obj_t * img, lv_signal_t sign, void * param)
         if(ext->w == lv_obj_get_width(img) && ext->h == lv_obj_get_height(img) &&
            (zoom != LV_IMG_ZOOM_NONE || angle != 0 || ext->pivot.x != ext->w / 2 || ext->pivot.y != ext->h / 2)) {
 
+            lv_coord_t w = lv_obj_get_width(img);
+            lv_coord_t h = lv_obj_get_height(img);
             lv_area_t coords;
-            _lv_img_buf_get_transformed_area(&coords, ext->w, ext->h, angle, zoom, &ext->pivot);
+            _lv_img_buf_get_transformed_area(&coords, w, h, angle, zoom, &ext->pivot);
             coords.x1 += img->coords.x1;
             coords.y1 += img->coords.y1;
             coords.x2 += img->coords.x1;

src/lv_widgets/lv_imgbtn.c

@@ -100,7 +100,7 @@ lv_obj_t * lv_imgbtn_create(lv_obj_t * par, const lv_obj_t * copy)
 #endif
         ext->tiled = copy_ext->tiled;
         /*Refresh the style with new signal function*/
-        lv_obj_refresh_style(imgbtn, LV_STYLE_PROP_ALL);
+        lv_obj_refresh_style(imgbtn, LV_OBJ_PART_ALL, LV_STYLE_PROP_ALL);
     }
 
     LV_LOG_INFO("image button created");
@@ -273,7 +273,38 @@ static lv_design_res_t lv_imgbtn_design(lv_obj_t * imgbtn, const lv_area_t * cli
     }
     /*Draw the object*/
     else if(mode == LV_DESIGN_DRAW_MAIN) {
-        ancestor_design(imgbtn, clip_area, mode);
+        lv_area_t img_coords;
+
+        lv_obj_get_coords(imgbtn, &img_coords);
+
+        lv_draw_rect_dsc_t bg_dsc;
+        lv_draw_rect_dsc_init(&bg_dsc);
+        lv_obj_init_draw_rect_dsc(imgbtn, LV_IMGBTN_PART_MAIN, &bg_dsc);
+
+        /*If the border is drawn later disable loading its properties*/
+        if(lv_obj_get_style_border_post(imgbtn, LV_OBJ_PART_MAIN)) {
+            bg_dsc.border_opa = LV_OPA_TRANSP;
+        }
+
+        lv_area_t bg_coords;
+        lv_area_copy(&bg_coords, &img_coords);
+        bg_coords.x1 -= lv_obj_get_style_pad_left(imgbtn, LV_IMGBTN_PART_MAIN);
+        bg_coords.x2 += lv_obj_get_style_pad_right(imgbtn, LV_IMGBTN_PART_MAIN);
+        bg_coords.y1 -= lv_obj_get_style_pad_top(imgbtn, LV_IMGBTN_PART_MAIN);
+        bg_coords.y2 += lv_obj_get_style_pad_bottom(imgbtn, LV_IMGBTN_PART_MAIN);
+
+        lv_draw_rect(&bg_coords, clip_area, &bg_dsc);
+
+        if(lv_obj_get_style_clip_corner(imgbtn, LV_OBJ_PART_MAIN)) {
+            lv_draw_mask_radius_param_t * mp = _lv_mem_buf_get(sizeof(lv_draw_mask_radius_param_t));
+
+            lv_coord_t r = lv_obj_get_style_radius(imgbtn, LV_OBJ_PART_MAIN);
+
+            lv_draw_mask_radius_init(mp, &bg_coords, r, false);
+            /*Add the mask and use `img+8` as custom id. Don't use `obj` directly because it might be used by the user*/
+            lv_draw_mask_add(mp, imgbtn + 8);
+        }
+
         /*Just draw an image*/
         lv_imgbtn_ext_t * ext    = lv_obj_get_ext_attr(imgbtn);
         lv_btn_state_t state     = lv_imgbtn_get_state(imgbtn);
@@ -374,6 +405,31 @@ static lv_design_res_t lv_imgbtn_design(lv_obj_t * imgbtn, const lv_area_t * cli
     }
     /*Post draw when the children are drawn*/
     else if(mode == LV_DESIGN_DRAW_POST) {
+        if(lv_obj_get_style_clip_corner(imgbtn, LV_OBJ_PART_MAIN)) {
+            lv_draw_mask_radius_param_t * param = lv_draw_mask_remove_custom(imgbtn + 8);
+            _lv_mem_buf_release(param);
+        }
+
+        lv_draw_rect_dsc_t draw_dsc;
+        lv_draw_rect_dsc_init(&draw_dsc);
+
+        /*If the border is drawn later disable loading other properties*/
+        if(lv_obj_get_style_border_post(imgbtn, LV_OBJ_PART_MAIN)) {
+            draw_dsc.bg_opa = LV_OPA_TRANSP;
+            draw_dsc.pattern_opa = LV_OPA_TRANSP;
+            draw_dsc.shadow_opa = LV_OPA_TRANSP;
+            lv_obj_init_draw_rect_dsc(imgbtn, LV_OBJ_PART_MAIN, &draw_dsc);
+
+
+            lv_area_t bg_coords;
+            lv_area_copy(&bg_coords, &imgbtn->coords);
+            bg_coords.x1 -= lv_obj_get_style_pad_left(imgbtn, LV_IMGBTN_PART_MAIN);
+            bg_coords.x2 += lv_obj_get_style_pad_right(imgbtn, LV_IMGBTN_PART_MAIN);
+            bg_coords.y1 -= lv_obj_get_style_pad_top(imgbtn, LV_IMGBTN_PART_MAIN);
+            bg_coords.y2 += lv_obj_get_style_pad_bottom(imgbtn, LV_IMGBTN_PART_MAIN);
+
+            lv_draw_rect(&bg_coords, clip_area, &draw_dsc);
+        }
     }
 
     return LV_DESIGN_RES_OK;
@@ -400,6 +456,18 @@ static lv_res_t lv_imgbtn_signal(lv_obj_t * imgbtn, lv_signal_t sign, void * par
          * changed as well Set the new image for the new state.*/
         refr_img(imgbtn);
     }
+    else if(sign == LV_SIGNAL_REFR_EXT_DRAW_PAD) {
+        /*Handle the padding of the background*/
+        lv_style_int_t left = lv_obj_get_style_pad_left(imgbtn, LV_IMGBTN_PART_MAIN);
+        lv_style_int_t right = lv_obj_get_style_pad_right(imgbtn, LV_IMGBTN_PART_MAIN);
+        lv_style_int_t top = lv_obj_get_style_pad_top(imgbtn, LV_IMGBTN_PART_MAIN);
+        lv_style_int_t bottom = lv_obj_get_style_pad_bottom(imgbtn, LV_IMGBTN_PART_MAIN);
+
+        imgbtn->ext_draw_pad = LV_MATH_MAX(imgbtn->ext_draw_pad, left);
+        imgbtn->ext_draw_pad = LV_MATH_MAX(imgbtn->ext_draw_pad, right);
+        imgbtn->ext_draw_pad = LV_MATH_MAX(imgbtn->ext_draw_pad, top);
+        imgbtn->ext_draw_pad = LV_MATH_MAX(imgbtn->ext_draw_pad, bottom);
+    }
     else if(sign == LV_SIGNAL_CLEANUP) {
         /*Nothing to cleanup. (No dynamically allocated memory in 'ext')*/
     }

src/lv_widgets/lv_label.c

@@ -161,7 +161,7 @@ lv_obj_t * lv_label_create(lv_obj_t * par, const lv_obj_t * copy)
         ext->dot_end       = copy_ext->dot_end;
 
         /*Refresh the style with new signal function*/
-        lv_obj_refresh_style(new_label, LV_STYLE_PROP_ALL);
+        lv_obj_refresh_style(new_label, LV_OBJ_PART_ALL, LV_STYLE_PROP_ALL);
     }
 
     LV_LOG_INFO("label created");

src/lv_widgets/lv_led.c

@@ -88,7 +88,7 @@ lv_obj_t * lv_led_create(lv_obj_t * par, const lv_obj_t * copy)
         ext->bright             = copy_ext->bright;
 
         /*Refresh the style with new signal function*/
-        lv_obj_refresh_style(led, LV_STYLE_PROP_ALL);
+        lv_obj_refresh_style(led, LV_OBJ_PART_ALL, LV_STYLE_PROP_ALL);
     }
 
     LV_LOG_INFO("led created");

src/lv_widgets/lv_line.c

@@ -95,7 +95,7 @@ lv_obj_t * lv_line_create(lv_obj_t * par, const lv_obj_t * copy)
         lv_line_set_points(line, copy_ext->point_array, copy_ext->point_num);
 
         /*Refresh the style with new signal function*/
-        lv_obj_refresh_style(line, LV_STYLE_PROP_ALL);
+        lv_obj_refresh_style(line, LV_OBJ_PART_ALL, LV_STYLE_PROP_ALL);
     }
 
     LV_LOG_INFO("line created");

src/lv_widgets/lv_linemeter.c

@@ -96,7 +96,7 @@ lv_obj_t * lv_linemeter_create(lv_obj_t * par, const lv_obj_t * copy)
         ext->cur_value             = copy_ext->cur_value;
 
         /*Refresh the style with new signal function*/
-        lv_obj_refresh_style(linemeter, LV_STYLE_PROP_ALL);
+        lv_obj_refresh_style(linemeter, LV_OBJ_PART_ALL, LV_STYLE_PROP_ALL);
     }
 
     LV_LOG_INFO("line meter created");
@@ -392,15 +392,15 @@ void lv_linemeter_draw_scale(lv_obj_t * lmeter, const lv_area_t * clip_area, uin
     lv_coord_t x_ofs  = lmeter->coords.x1 + r_out + left;
     lv_coord_t y_ofs  = lmeter->coords.y1 + r_out + top;
     int16_t angle_ofs = ext->angle_ofs + 90 + (360 - ext->scale_angle) / 2;
-    int16_t level =
+    int16_t level = ext->mirrored ?
-        (int32_t)((int32_t)(ext->cur_value - ext->min_value) * (ext->line_cnt - 1)) / (ext->max_value - ext->min_value);
+                    (int32_t)((int32_t)(ext->max_value - ext->cur_value) * (ext->line_cnt - 1)) / (ext->max_value - ext->min_value) :
+                    (int32_t)((int32_t)(ext->cur_value - ext->min_value) * (ext->line_cnt - 1)) / (ext->max_value - ext->min_value);
     uint8_t i;
 
     lv_color_t main_color = lv_obj_get_style_line_color(lmeter, part);
     lv_color_t grad_color = lv_obj_get_style_scale_grad_color(lmeter, part);
     lv_color_t end_color = lv_obj_get_style_scale_end_color(lmeter, part);
 
-
     lv_draw_line_dsc_t line_dsc;
     lv_draw_line_dsc_init(&line_dsc);
     lv_obj_init_draw_line_dsc(lmeter, part, &line_dsc);
@@ -520,7 +520,7 @@ void lv_linemeter_draw_scale(lv_obj_t * lmeter, const lv_area_t * clip_area, uin
         p1.y = y_out_extra;
 
         /* Set the color of the lines */
-        if(i > level) {
+        if((!ext->mirrored && i >= level) || (ext->mirrored && i <= level)) {
             line_dsc.color = end_color;
             line_dsc.width = end_line_width;
         }

src/lv_widgets/lv_list.c

@@ -115,7 +115,7 @@ lv_obj_t * lv_list_create(lv_obj_t * par, const lv_obj_t * copy)
         }
 
         /*Refresh the style with new signal function*/
-        lv_obj_refresh_style(list, LV_STYLE_PROP_ALL);
+        lv_obj_refresh_style(list, LV_OBJ_PART_ALL, LV_STYLE_PROP_ALL);
     }
 
     LV_LOG_INFO("list created");
@@ -365,11 +365,11 @@ lv_obj_t * lv_list_get_btn_label(const lv_obj_t * btn)
 {
     LV_ASSERT_OBJ(btn, "lv_btn");
 
-    lv_obj_t * label = lv_obj_get_child(btn, NULL);
+    lv_obj_t * label = lv_obj_get_child_back(btn, NULL);
     if(label == NULL) return NULL;
 
     while(lv_list_is_list_label(label) == false) {
-        label = lv_obj_get_child(btn, label);
+        label = lv_obj_get_child_back(btn, label);
         if(label == NULL) break;
     }
 
@@ -386,11 +386,11 @@ lv_obj_t * lv_list_get_btn_img(const lv_obj_t * btn)
     LV_ASSERT_OBJ(btn, "lv_btn");
 
 #if LV_USE_IMG != 0
-    lv_obj_t * img = lv_obj_get_child(btn, NULL);
+    lv_obj_t * img = lv_obj_get_child_back(btn, NULL);
     if(img == NULL) return NULL;
 
     while(lv_list_is_list_img(img) == false) {
-        img = lv_obj_get_child(btn, img);
+        img = lv_obj_get_child_back(btn, img);
         if(img == NULL) break;
     }
 

src/lv_widgets/lv_msgbox.c

@@ -127,7 +127,7 @@ lv_obj_t * lv_msgbox_create(lv_obj_t * par, const lv_obj_t * copy)
         if(copy_ext->btnm) ext->btnm = lv_btnmatrix_create(mbox, copy_ext->btnm);
 
         /*Refresh the style with new signal function*/
-        lv_obj_refresh_style(mbox, LV_STYLE_PROP_ALL);
+        lv_obj_refresh_style(mbox, LV_OBJ_PART_ALL, LV_STYLE_PROP_ALL);
     }
 
     LV_LOG_INFO("message box created");

src/lv_widgets/lv_objmask.c

@@ -86,7 +86,7 @@ lv_obj_t * lv_objmask_create(lv_obj_t * par, const lv_obj_t * copy)
         /* lv_objmask_ext_t * copy_ext = lv_obj_get_ext_attr(copy); */
 
         /*Refresh the style with new signal function*/
-        lv_obj_refresh_style(objmask, LV_STYLE_PROP_ALL);
+        lv_obj_refresh_style(objmask, LV_OBJ_PART_ALL, LV_STYLE_PROP_ALL);
     }
 
     LV_LOG_INFO("object mask created");

src/lv_widgets/lv_page.c

@@ -495,14 +495,14 @@ void lv_page_focus(lv_obj_t * page, const lv_obj_t * obj, lv_anim_enable_t anim_
     lv_coord_t scrlable_y = lv_obj_get_y(ext->scrl);
     lv_coord_t page_h     = lv_obj_get_height(page);
 
-    lv_coord_t top_err = -(scrlable_y + obj_y);
-    lv_coord_t bot_err = scrlable_y + obj_y + obj_h - page_h;
-
     lv_style_int_t bg_top = lv_obj_get_style_pad_top(page, LV_PAGE_PART_BG);
     lv_style_int_t bg_bottom = lv_obj_get_style_pad_bottom(page, LV_PAGE_PART_BG);
     lv_style_int_t scrl_top = lv_obj_get_style_pad_top(ext->scrl, LV_CONT_PART_MAIN);
     lv_style_int_t scrl_bottom = lv_obj_get_style_pad_bottom(ext->scrl, LV_CONT_PART_MAIN);
 
+    lv_coord_t top_err = -((scrlable_y + obj_y) - bg_top);
+    lv_coord_t bot_err = scrlable_y + obj_y + obj_h - (page_h - bg_bottom);
+
     /*Out of the page on the top*/
     if((obj_h <= page_h && top_err > 0) || (obj_h > page_h && top_err < bot_err)) {
         /*Calculate a new position and let some space above*/
@@ -524,14 +524,14 @@ void lv_page_focus(lv_obj_t * page, const lv_obj_t * obj, lv_anim_enable_t anim_
     lv_coord_t scrlable_x = lv_obj_get_x(ext->scrl);
     lv_coord_t page_w     = lv_obj_get_width(page);
 
-    lv_coord_t left_err  = -(scrlable_x + obj_x);
-    lv_coord_t right_err = scrlable_x + obj_x + obj_w - page_w;
-
     lv_style_int_t bg_left = lv_obj_get_style_pad_left(page, LV_PAGE_PART_BG);
     lv_style_int_t bg_right = lv_obj_get_style_pad_right(page, LV_PAGE_PART_BG);
     lv_style_int_t scrl_left = lv_obj_get_style_pad_top(ext->scrl, LV_CONT_PART_MAIN);
     lv_style_int_t scrl_right = lv_obj_get_style_pad_bottom(ext->scrl, LV_CONT_PART_MAIN);
 
+    lv_coord_t left_err  = -((scrlable_x + obj_x) - bg_left);
+    lv_coord_t right_err = scrlable_x + obj_x + obj_w - (page_w - bg_right);
+
     /*Out of the page on the left*/
     if((obj_w <= page_w && left_err > 0) || (obj_w > page_w && left_err < right_err)) {
         /*Calculate a new position and let some space on the side*/

src/lv_widgets/lv_page.h

@@ -41,7 +41,7 @@ enum {
     LV_SCROLLBAR_MODE_DRAG   = 0x2, /**< Show scroll bars when page is being dragged*/
     LV_SCROLLBAR_MODE_AUTO   = 0x3, /**< Show scroll bars when the scrollable container is large enough to be scrolled*/
     LV_SCROLLBAR_MODE_HIDE   = 0x4, /**< Hide the scroll bar temporally*/
-    LV_SCROLLBAR_MODE_UNHIDE = 0x5, /**< Unhide the previously hidden scroll bar. Recover original mode too*/
+    LV_SCROLLBAR_MODE_UNHIDE = 0x8, /**< Unhide the previously hidden scroll bar. Recover original mode too*/
 };
 typedef uint8_t lv_scrollbar_mode_t;
 

src/lv_widgets/lv_roller.c

@@ -135,7 +135,7 @@ lv_obj_t * lv_roller_create(lv_obj_t * par, const lv_obj_t * copy)
         lv_obj_set_signal_cb(scrl, lv_roller_scrl_signal);
 
         lv_style_list_copy(&ext->style_sel, &copy_ext->style_sel);
-        lv_obj_refresh_style(roller, LV_STYLE_PROP_ALL);
+        lv_obj_refresh_style(roller, LV_OBJ_PART_ALL, LV_STYLE_PROP_ALL);
     }
 
     LV_LOG_INFO("roller created");

src/lv_widgets/lv_slider.c

@@ -103,7 +103,7 @@ lv_obj_t * lv_slider_create(lv_obj_t * par, const lv_obj_t * copy)
         lv_area_copy(&ext->left_knob_area, &copy_ext->left_knob_area);
         lv_area_copy(&ext->right_knob_area, &copy_ext->right_knob_area);
 
-        lv_obj_refresh_style(slider, LV_OBJ_PART_ALL);
+        lv_obj_refresh_style(slider, LV_OBJ_PART_ALL, LV_STYLE_PROP_ALL);
     }
 
     LV_LOG_INFO("slider created");

src/lv_widgets/lv_spinbox.c

@@ -106,7 +106,7 @@ lv_obj_t * lv_spinbox_create(lv_obj_t * par, const lv_obj_t * copy)
         lv_spinbox_set_rollover(spinbox, copy_ext->rollover);
 
         /*Refresh the style with new signal function*/
-        lv_obj_refresh_style(spinbox, LV_STYLE_PROP_ALL);
+        lv_obj_refresh_style(spinbox, LV_OBJ_PART_ALL, LV_STYLE_PROP_ALL);
     }
 
     lv_spinbox_updatevalue(spinbox);

src/lv_widgets/lv_spinner.c

@@ -106,7 +106,7 @@ lv_obj_t * lv_spinner_create(lv_obj_t * par, const lv_obj_t * copy)
         ext->time                   = copy_ext->time;
         ext->anim_dir               = copy_ext->anim_dir;
         /*Refresh the style with new signal function*/
-        lv_obj_refresh_style(spinner, LV_STYLE_PROP_ALL);
+        lv_obj_refresh_style(spinner, LV_OBJ_PART_ALL, LV_STYLE_PROP_ALL);
     }
 
     lv_spinner_set_type(spinner, ext->anim_type);

src/lv_widgets/lv_switch.c

@@ -100,7 +100,7 @@ lv_obj_t * lv_switch_create(lv_obj_t * par, const lv_obj_t * copy)
         lv_switch_ext_t * copy_ext = lv_obj_get_ext_attr(copy);
 
         lv_style_list_copy(&ext->style_knob, &copy_ext->style_knob);
-        lv_obj_refresh_style(sw, LV_STYLE_PROP_ALL);
+        lv_obj_refresh_style(sw, LV_OBJ_PART_ALL, LV_STYLE_PROP_ALL);
     }
 
     /*Refresh the style with new signal function*/

src/lv_widgets/lv_table.c

@@ -105,12 +105,12 @@ lv_obj_t * lv_table_create(lv_obj_t * par, const lv_obj_t * copy)
         lv_table_ext_t * copy_ext = lv_obj_get_ext_attr(copy);
         for(i = 0; i < LV_TABLE_CELL_STYLE_CNT; i++) {
             lv_style_list_copy(&ext->cell_style[i], &copy_ext->cell_style[i]);
-            lv_table_set_row_cnt(table, copy_ext->row_cnt);
-            lv_table_set_col_cnt(table, copy_ext->col_cnt);
         }
+        lv_table_set_row_cnt(table, copy_ext->row_cnt);
+        lv_table_set_col_cnt(table, copy_ext->col_cnt);
 
         /*Refresh the style with new signal function*/
-        lv_obj_refresh_style(table, LV_STYLE_PROP_ALL);
+        lv_obj_refresh_style(table, LV_OBJ_PART_ALL, LV_STYLE_PROP_ALL);
     }
 
     LV_LOG_INFO("table created");
@@ -192,6 +192,16 @@ void lv_table_set_row_cnt(lv_obj_t * table, uint16_t row_cnt)
     uint16_t old_row_cnt = ext->row_cnt;
     ext->row_cnt         = row_cnt;
 
+    if(ext->row_cnt > 0) {
+        ext->row_h = lv_mem_realloc(ext->row_h, ext->row_cnt * sizeof(ext->row_h[0]));
+        LV_ASSERT_MEM(ext->row_h);
+        if(ext->row_h == NULL) return;
+    }
+    else {
+        lv_mem_free(ext->row_h);
+        ext->row_h = NULL;
+    }
+
     if(ext->row_cnt > 0 && ext->col_cnt > 0) {
         ext->cell_data = lv_mem_realloc(ext->cell_data, ext->row_cnt * ext->col_cnt * sizeof(char *));
         LV_ASSERT_MEM(ext->cell_data);
@@ -203,10 +213,6 @@ void lv_table_set_row_cnt(lv_obj_t * table, uint16_t row_cnt)
             uint32_t new_cell_cnt = ext->col_cnt * ext->row_cnt;
             _lv_memset_00(&ext->cell_data[old_cell_cnt], (new_cell_cnt - old_cell_cnt) * sizeof(ext->cell_data[0]));
         }
-
-        ext->row_h = lv_mem_realloc(ext->row_h, ext->row_cnt * sizeof(ext->row_h[0]));
-        LV_ASSERT_MEM(ext->cell_data);
-        if(ext->cell_data == NULL) return;
     }
     else {
         lv_mem_free(ext->cell_data);
@@ -968,10 +974,15 @@ static lv_style_list_t * lv_table_get_style(lv_obj_t * table, uint8_t part)
 
 static void refr_size(lv_obj_t * table)
 {
+
     lv_coord_t h = 0;
     lv_coord_t w = 0;
 
     lv_table_ext_t * ext = lv_obj_get_ext_attr(table);
+    if(ext->row_cnt == 0 || ext->col_cnt == 0) {
+        lv_obj_set_size(table, w, h);
+        return;
+    }
 
     uint16_t i;
     for(i = 0; i < ext->col_cnt; i++) {

src/lv_widgets/lv_tabview.c

@@ -180,11 +180,11 @@ lv_obj_t * lv_tabview_create(lv_obj_t * par, const lv_obj_t * copy)
                                                                                                               LV_PAGE_PART_SCROLLABLE));
             lv_style_list_copy(lv_obj_get_style_list(new_tab, LV_PAGE_PART_SCROLLBAR), lv_obj_get_style_list(copy_tab,
                                                                                                              LV_PAGE_PART_SCROLLBAR));
-            lv_obj_refresh_style(new_tab, LV_STYLE_PROP_ALL);
+            lv_obj_refresh_style(new_tab, LV_OBJ_PART_ALL, LV_STYLE_PROP_ALL);
         }
 
         /*Refresh the style with new signal function*/
-        lv_obj_refresh_style(tabview, LV_STYLE_PROP_ALL);
+        lv_obj_refresh_style(tabview, LV_OBJ_PART_ALL, LV_STYLE_PROP_ALL);
     }
 
     tabview_realign(tabview);
@@ -628,7 +628,7 @@ static lv_res_t lv_tabview_signal(lv_obj_t * tabview, lv_signal_t sign, void * p
     lv_tabview_ext_t * ext = lv_obj_get_ext_attr(tabview);
     if(sign == LV_SIGNAL_CLEANUP) {
         uint8_t i;
-        for(i = 0; ext->tab_name_ptr[i][0] != '\0'; i++) lv_mem_free(ext->tab_name_ptr[i]);
+        for(i = 0; ext->tab_name_ptr[i][0] != '\0' && ext->tab_name_ptr[i][0] != '\n'; i++) lv_mem_free(ext->tab_name_ptr[i]);
 
         lv_mem_free(ext->tab_name_ptr);
         ext->tab_name_ptr = NULL;

src/lv_widgets/lv_textarea.c

@@ -188,7 +188,7 @@ lv_obj_t * lv_textarea_create(lv_obj_t * par, const lv_obj_t * copy)
         if(copy_ext->one_line) lv_textarea_set_one_line(ta, true);
 
         /*Refresh the style with new signal function*/
-        lv_obj_refresh_style(ta, LV_STYLE_PROP_ALL);
+        lv_obj_refresh_style(ta, LV_OBJ_PART_ALL, LV_STYLE_PROP_ALL);
     }
 
 #if LV_USE_ANIMATION

src/lv_widgets/lv_tileview.c

@@ -133,7 +133,7 @@ lv_obj_t * lv_tileview_create(lv_obj_t * par, const lv_obj_t * copy)
 #endif
 
         /*Refresh the style with new signal function*/
-        lv_obj_refresh_style(new_tileview, LV_STYLE_PROP_ALL);
+        lv_obj_refresh_style(new_tileview, LV_OBJ_PART_ALL, LV_STYLE_PROP_ALL);
     }
 
     LV_LOG_INFO("tileview created");

src/lv_widgets/lv_win.c

@@ -156,7 +156,7 @@ lv_obj_t * lv_win_create(lv_obj_t * par, const lv_obj_t * copy)
     }
 
     /*Refresh the style with new signal function*/
-    lv_obj_refresh_style(new_win, LV_STYLE_PROP_ALL);
+    lv_obj_refresh_style(new_win, LV_OBJ_PART_ALL, LV_STYLE_PROP_ALL);
 
     lv_win_realign(new_win);
 

tests/Makefile

@@ -30,6 +30,10 @@ CSRCS += lv_test_assert.c
 CSRCS += lv_test_core/lv_test_core.c
 CSRCS += lv_test_core/lv_test_obj.c
 CSRCS += lv_test_core/lv_test_style.c
+CSRCS += lv_test_core/lv_test_font_loader.c
+CSRCS += lv_test_fonts/font_1.c
+CSRCS += lv_test_fonts/font_2.c
+CSRCS += lv_test_fonts/font_3.c
 
 OBJEXT ?= .o
 

tests/build.py

@@ -120,6 +120,7 @@ minimal_monochrome = {
   "LV_USE_PAGE":0,
   "LV_USE_SPINNER":0,
   "LV_USE_ROLLER":0,
+  "LV_USE_ROTARY":0,
   "LV_USE_SLIDER":0,
   "LV_USE_SPINBOX":0,
   "LV_USE_SWITCH":0,
@@ -196,6 +197,7 @@ all_obj_minimal_features = {
   "LV_USE_PAGE":1,
   "LV_USE_SPINNER":0, #Disabled beacsue needs anim
   "LV_USE_ROLLER":1,
+  "LV_USE_ROTARY":1,
   "LV_USE_SLIDER":1,
   "LV_USE_SPINBOX":1,
   "LV_USE_SWITCH":1,
@@ -274,6 +276,7 @@ all_obj_all_features = {
   "LV_USE_PAGE":1,
   "LV_USE_SPINNER":1,
   "LV_USE_ROLLER":1,
+  "LV_USE_ROTARY":1,
   "LV_USE_SLIDER":1,
   "LV_USE_SPINBOX":1,
   "LV_USE_SWITCH":1,
@@ -365,6 +368,7 @@ advanced_features = {
   "LV_USE_PAGE":1,
   "LV_USE_SPINNER":1,
   "LV_USE_ROLLER":1,
+  "LV_USE_ROTARY":1,
   "LV_USE_SLIDER":1,
   "LV_USE_SPINBOX":1,
   "LV_USE_SWITCH":1,

tests/lv_test_assert.c

@@ -97,6 +97,15 @@ void lv_test_error(const char * s, ...)
     exit(1);
 }
 
+void lv_test_assert_true(int32_t expression, const char * s)
+{
+    if(!expression) {
+        lv_test_error("   FAIL: %s. (Expected: not zero)", s, expression);
+    } else {
+        lv_test_print("   PASS: %s. (Expected: not zero)", s, expression);
+    }
+}
+
 void lv_test_assert_int_eq(int32_t n_ref, int32_t n_act, const char * s)
 {
     if(n_ref != n_act) {
@@ -134,6 +143,17 @@ void lv_test_assert_str_eq(const char * s_ref, const char * s_act, const char *
     }
 }
 
+
+void lv_test_assert_array_eq(const uint8_t *p_ref, const uint8_t *p_act, int32_t size, const char * s)
+{
+    if(memcmp(p_ref, p_act, size) != 0) {
+        lv_test_error("   FAIL: %s. (Expected: all %d bytes should be equal)", s, size);
+    } else {
+        lv_test_print("   PASS: %s. (Expected: all %d bytes should be equal)", s, size);
+    }
+}
+
+
 void lv_test_assert_ptr_eq(const void * p_ref, const void * p_act, const char * s)
 {
     if(p_ref != p_act) {

tests/lv_test_assert.h

@@ -32,6 +32,7 @@ extern "C" {
 void lv_test_print(const char * s, ...);
 void lv_test_exit(const char * s, ...);
 void lv_test_error(const char * s, ...);
+void lv_test_assert_true(int32_t expression, const char * s);
 void lv_test_assert_int_eq(int32_t n1, int32_t n2, const char * s);
 void lv_test_assert_int_gt(int32_t n_ref, int32_t n_act, const char * s);
 void lv_test_assert_int_lt(int32_t n_ref, int32_t n_act, const char * s);
@@ -39,6 +40,7 @@ void lv_test_assert_str_eq(const char * str1, const char * str2, const char * s)
 void lv_test_assert_ptr_eq(const void * p_ref, const void * p_act, const char * s);
 void lv_test_assert_color_eq(lv_color_t c_ref, lv_color_t c_act, const char * s);
 void lv_test_assert_img_eq(const char * ref_img_fn, const char * s);
+void lv_test_assert_array_eq(const uint8_t *p_ref, const uint8_t *p_act, int32_t size, const char * s);
 
 /**********************
  *      MACROS

tests/lv_test_core/lv_test_core.c

@@ -12,6 +12,7 @@
 #include "lv_test_core.h"
 #include "lv_test_obj.h"
 #include "lv_test_style.h"
+#include "lv_test_font_loader.h"
 
 /*********************
  *      DEFINES
@@ -46,6 +47,7 @@ void lv_test_core(void)
 
     lv_test_obj();
     lv_test_style();
+    lv_test_font_loader();
 }
 
 

tests/lv_test_core/lv_test_font_loader.c

@@ -0,0 +1,213 @@
+/**
+ * @file lv_test_font_loader.c
+ *
+ */
+
+/*********************
+ *      INCLUDES
+ *********************/
+
+#include "../lv_test_assert.h"
+#if LV_BUILD_TEST
+#include "../lvgl.h"
+#include "../src/lv_font/lv_font_fmt_txt.h"
+#include "../src/lv_font/lv_font.h"
+#include "../src/lv_font/lv_font_loader.h"
+
+#include "lv_test_font_loader.h" 
+
+/*********************
+ *      DEFINES
+ *********************/
+
+/**********************
+ *      TYPEDEFS
+ **********************/
+
+/**********************
+ *  STATIC PROTOTYPES
+ **********************/
+
+#if LV_USE_FILESYSTEM
+static int compare_fonts(lv_font_t * f1, lv_font_t * f2);
+#endif
+
+/**********************
+ *  STATIC VARIABLES
+ **********************/
+
+/**********************
+ *      MACROS
+ **********************/
+
+/**********************
+ *   GLOBAL FUNCTIONS
+ **********************/
+
+extern lv_font_t font_1;
+extern lv_font_t font_2;
+extern lv_font_t font_3;
+
+void lv_test_font_loader(void)
+{
+#if LV_USE_FILESYSTEM
+    lv_font_t * font_1_bin = lv_font_load("f:font_1.fnt");
+    lv_font_t * font_2_bin = lv_font_load("f:font_2.fnt");
+    lv_font_t * font_3_bin = lv_font_load("f:font_3.fnt");
+
+    compare_fonts(&font_1, font_1_bin);
+    compare_fonts(&font_2, font_2_bin);
+    compare_fonts(&font_3, font_3_bin);
+
+    lv_font_free(font_1_bin);
+    lv_font_free(font_2_bin);
+    lv_font_free(font_3_bin);
+#endif
+}
+
+#if LV_USE_FILESYSTEM
+static int compare_fonts(lv_font_t * f1, lv_font_t * f2)
+{
+    lv_test_assert_true(f1 != NULL && f2 != NULL, "font not null");
+
+    lv_test_assert_ptr_eq(f1->get_glyph_dsc, f2->get_glyph_dsc, "glyph_dsc");
+    lv_test_assert_ptr_eq(f1->get_glyph_bitmap, f2->get_glyph_bitmap, "glyph_bitmap");
+    lv_test_assert_int_eq(f1->line_height, f2->line_height, "line_height");
+    lv_test_assert_int_eq(f1->base_line, f2->base_line, "base_line");
+#if !(LVGL_VERSION_MAJOR == 6 && LVGL_VERSION_MINOR == 0)
+    lv_test_assert_int_eq(f1->subpx, f2->subpx, "subpx");
+#endif
+    lv_font_fmt_txt_dsc_t * dsc1 = (lv_font_fmt_txt_dsc_t *) f1->dsc;
+    lv_font_fmt_txt_dsc_t * dsc2 = (lv_font_fmt_txt_dsc_t *) f2->dsc;
+
+    lv_test_assert_int_eq(dsc1->kern_scale, dsc2->kern_scale, "kern_scale");
+    lv_test_assert_int_eq(dsc1->cmap_num, dsc2->cmap_num, "cmap_num");
+    lv_test_assert_int_eq(dsc1->bpp, dsc2->bpp, "bpp");
+    lv_test_assert_int_eq(dsc1->kern_classes, dsc2->kern_classes, "kern_classes");
+    lv_test_assert_int_eq(dsc1->bitmap_format, dsc2->bitmap_format, "bitmap_format");
+
+    // cmaps
+    int total_glyphs = 0;
+    for(int i = 0; i < dsc1->cmap_num; ++i) {
+        lv_font_fmt_txt_cmap_t * cmaps1 = (lv_font_fmt_txt_cmap_t *) &dsc1->cmaps[i];
+        lv_font_fmt_txt_cmap_t * cmaps2 = (lv_font_fmt_txt_cmap_t *) &dsc2->cmaps[i];
+
+        lv_test_assert_int_eq(cmaps1->range_start, cmaps2->range_start, "range_start");
+        lv_test_assert_int_eq(cmaps1->range_length, cmaps2->range_length, "range_length");
+        lv_test_assert_int_eq(cmaps1->glyph_id_start, cmaps2->glyph_id_start, "glyph_id_start");
+        lv_test_assert_int_eq(cmaps1->type, cmaps2->type, "type");
+        lv_test_assert_int_eq(cmaps1->list_length, cmaps2->list_length, "list_length");
+
+        if(cmaps1->unicode_list != NULL && cmaps2->unicode_list != NULL) {
+            lv_test_assert_true(cmaps1->unicode_list && cmaps2->unicode_list, "unicode_list");
+
+            lv_test_assert_array_eq(
+                    (uint8_t *) cmaps1->unicode_list,
+                    (uint8_t *) cmaps2->unicode_list,
+                    sizeof(uint16_t) * cmaps1->list_length,
+                    "unicode_list");
+            total_glyphs += cmaps1->list_length;
+        }
+        else {
+            total_glyphs += cmaps1->range_length;
+            lv_test_assert_ptr_eq(cmaps1->unicode_list, cmaps2->unicode_list, "unicode_list");
+        }
+
+        if(cmaps1->glyph_id_ofs_list != NULL && cmaps2->glyph_id_ofs_list != NULL) {
+            uint8_t * ids1 = (uint8_t *) cmaps1->glyph_id_ofs_list;
+            uint8_t * ids2 = (uint8_t *) cmaps2->glyph_id_ofs_list;
+
+            lv_test_assert_array_eq(ids1, ids2, cmaps1->list_length, "glyph_id_ofs_list");
+        }
+        else {
+            lv_test_assert_ptr_eq(cmaps1->glyph_id_ofs_list, cmaps2->glyph_id_ofs_list, "glyph_id_ofs_list");
+        }
+    }
+
+    // kern_dsc
+    if (dsc1->kern_classes == 1 && dsc2->kern_classes == 1) {
+        lv_font_fmt_txt_kern_classes_t * kern1 = (lv_font_fmt_txt_kern_classes_t *) dsc1->kern_dsc;
+        lv_font_fmt_txt_kern_classes_t * kern2 = (lv_font_fmt_txt_kern_classes_t *) dsc2->kern_dsc;
+        if (kern1 != NULL && kern2 != NULL) {
+            lv_test_assert_int_eq(kern1->right_class_cnt, kern2->right_class_cnt, "right_class_cnt");
+            lv_test_assert_int_eq(kern1->left_class_cnt, kern2->left_class_cnt, "left_class_cnt");
+
+            lv_test_assert_array_eq(
+                    (uint8_t *) kern1->left_class_mapping,
+                    (uint8_t *) kern2->left_class_mapping,
+                    kern1->left_class_cnt,
+                    "left_class_mapping");
+
+            lv_test_assert_array_eq(
+                    (uint8_t *) kern1->right_class_mapping,
+                    (uint8_t *) kern2->right_class_mapping,
+                    kern1->right_class_cnt,
+                    "right_class_mapping");
+
+            lv_test_assert_array_eq(
+                    (uint8_t *) kern1->class_pair_values,
+                    (uint8_t *) kern2->class_pair_values,
+                    kern1->right_class_cnt * kern1->left_class_cnt,
+                    "class_pair_values");
+        }
+        else {
+            lv_test_assert_ptr_eq(kern1, kern2, "kern");
+        }
+    }
+    else if (dsc1->kern_classes == 0 && dsc2->kern_classes == 0) {
+        lv_font_fmt_txt_kern_pair_t * kern1 = (lv_font_fmt_txt_kern_pair_t *) dsc1->kern_dsc;
+        lv_font_fmt_txt_kern_pair_t * kern2 = (lv_font_fmt_txt_kern_pair_t *) dsc2->kern_dsc;
+        if (kern1 != NULL && kern2 != NULL) {
+            lv_test_assert_int_eq(kern1->glyph_ids_size, kern2->glyph_ids_size, "glyph_ids_size");
+            lv_test_assert_int_eq(kern1->pair_cnt, kern2->pair_cnt, "pair_cnt");
+
+            int ids_size;
+
+            if (kern1->glyph_ids_size == 0) {
+                ids_size = sizeof(int8_t) * 2 * kern1->pair_cnt;
+            }
+            else {
+                ids_size = sizeof(int16_t) * 2 * kern1->pair_cnt;
+            }
+
+            lv_test_assert_array_eq(kern1->glyph_ids, kern2->glyph_ids, ids_size, "glyph_ids");
+            lv_test_assert_array_eq(
+                    (uint8_t * ) kern1->values,
+                    (uint8_t * ) kern2->values,
+                    kern1->pair_cnt,
+                    "glyph_values");
+        }
+    }
+
+    lv_font_fmt_txt_glyph_dsc_t * glyph_dsc1 = (lv_font_fmt_txt_glyph_dsc_t *) dsc1->glyph_dsc;
+    lv_font_fmt_txt_glyph_dsc_t * glyph_dsc2 = (lv_font_fmt_txt_glyph_dsc_t *) dsc2->glyph_dsc;
+
+    for(int i = 0; i < total_glyphs; ++i) {
+        if (i < total_glyphs - 1) {
+            int size1 = glyph_dsc1[i+1].bitmap_index - glyph_dsc1[i].bitmap_index;
+
+            if (size1 > 0) {
+                lv_test_assert_array_eq(
+                        dsc1->glyph_bitmap + glyph_dsc1[i].bitmap_index,
+                        dsc2->glyph_bitmap + glyph_dsc2[i].bitmap_index,
+                        size1 - 1, "glyph_bitmap");
+            }
+        }
+        lv_test_assert_int_eq(glyph_dsc1[i].adv_w, glyph_dsc2[i].adv_w, "adv_w");
+        lv_test_assert_int_eq(glyph_dsc1[i].box_w, glyph_dsc2[i].box_w, "box_w");
+        lv_test_assert_int_eq(glyph_dsc1[i].box_h, glyph_dsc2[i].box_h, "box_h");
+        lv_test_assert_int_eq(glyph_dsc1[i].ofs_x, glyph_dsc2[i].ofs_x, "ofs_x");
+        lv_test_assert_int_eq(glyph_dsc1[i].ofs_y, glyph_dsc2[i].ofs_y, "ofs_y");
+    }
+
+    LV_LOG_INFO("No differences found!");
+    return 0;
+}
+#endif
+
+/**********************
+ *   STATIC FUNCTIONS
+ **********************/
+
+#endif // LV_BUILD_TEST
+

tests/lv_test_core/lv_test_font_loader.h

@@ -0,0 +1,39 @@
+/**
+ * @file lv_font_loader.h
+ *
+ */
+
+#ifndef LV_TEST_FONT_LOADER_H
+#define LV_TEST_FONT_LOADER_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*********************
+ *      INCLUDES
+ *********************/
+
+/*********************
+ *      DEFINES
+ *********************/
+
+/**********************
+ *      TYPEDEFS
+ **********************/
+
+/**********************
+ * GLOBAL PROTOTYPES
+ **********************/
+void lv_test_font_loader(void);
+
+/**********************
+ *      MACROS
+ **********************/
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#endif /*LV_TEST_FONT_LOADER_H*/
+

tests/lv_test_fonts/font_3.c

@@ -0,0 +1,953 @@
+#include "lvgl/lvgl.h"
+
+/*******************************************************************************
+ * Size: 20 px
+ * Bpp: 4
+ * Opts: --bpp 4 --size 20 --font ../RobotoMono-Regular.ttf -r 0x20-0x7f --format lvgl -o ..\generated_fonts/font_3.c
+ ******************************************************************************/
+
+#ifndef FONT_3
+#define FONT_3 1
+#endif
+
+#if FONT_3
+
+/*-----------------
+ *    BITMAPS
+ *----------------*/
+
+/*Store the image of the glyphs*/
+static LV_ATTRIBUTE_LARGE_CONST const uint8_t gylph_bitmap[] = {
+    /* U+20 " " */
+
+    /* U+21 "!" */
+    0x1f, 0xb0, 0xf, 0xfe, 0x69, 0x10, 0x76, 0x40,
+    0x30, 0x81, 0x76, 0x98, 0xb0,
+
+    /* U+22 "\"" */
+    0x8e, 0x0, 0x7b, 0x0, 0x7c, 0x60, 0x11, 0x80,
+    0x80, 0x43, 0xca, 0x0, 0x37,
+
+    /* U+23 "#" */
+    0x0, 0xc5, 0xe6, 0x7, 0xe6, 0x1, 0xc8, 0x6,
+    0xa, 0x6, 0x1, 0xde, 0x40, 0xf, 0x30, 0xf,
+    0x2a, 0x0, 0x15, 0x40, 0x15, 0x7f, 0x8d, 0xbf,
+    0xc6, 0xde, 0xe1, 0xd2, 0xe0, 0xf2, 0xe0, 0xf2,
+    0x80, 0x8d, 0x81, 0x2d, 0xa1, 0x2c, 0x60, 0x11,
+    0x88, 0x80, 0x84, 0x40, 0x1d, 0xc4, 0x0, 0xd2,
+    0x0, 0xc2, 0x25, 0x61, 0x13, 0x30, 0x40, 0xd,
+    0xdc, 0x35, 0xee, 0x1a, 0xf6, 0x3, 0xdd, 0x4,
+    0x5c, 0x84, 0xdf, 0x80, 0xa0, 0x1, 0x90, 0xc1,
+    0x90, 0xc0, 0x2d, 0x21, 0xd, 0x20, 0xf, 0x1b,
+    0x80, 0x11, 0x0, 0x18,
+
+    /* U+24 "$" */
+    0x0, 0xcb, 0xe2, 0x1, 0xff, 0xc4, 0x78, 0xb,
+    0x40, 0xd, 0xb0, 0x64, 0xb6, 0xe0, 0x8, 0x27,
+    0xed, 0xd0, 0xc0, 0x82, 0x4, 0x0, 0xa, 0x41,
+    0xc0, 0x40, 0x38, 0xc8, 0x0, 0xe0, 0xe0, 0x12,
+    0x6b, 0x5, 0x84, 0x5a, 0x0, 0x70, 0xe9, 0xa5,
+    0xea, 0x80, 0x62, 0xcc, 0x29, 0x54, 0x80, 0x71,
+    0xd6, 0x93, 0x21, 0x29, 0x0, 0x45, 0x21, 0xaf,
+    0x4a, 0x1, 0x9c, 0xd, 0x2, 0x44, 0x2, 0xa0,
+    0xd1, 0x71, 0xf8, 0x86, 0x31, 0x38, 0x44, 0x9b,
+    0xb8, 0x97, 0x0, 0x26, 0xd6, 0x1e, 0xa1, 0x0,
+    0xe1, 0x0, 0xe0,
+
+    /* U+25 "%" */
+    0x7, 0xee, 0x40, 0x7, 0xc9, 0x10, 0xb7, 0x50,
+    0xf, 0x61, 0x32, 0xa7, 0x80, 0xf1, 0x80, 0x42,
+    0x1, 0xd2, 0x66, 0x0, 0x69, 0x98, 0x97, 0x45,
+    0xe0, 0x2, 0x55, 0x66, 0xab, 0xc1, 0x28, 0x6,
+    0xae, 0xe5, 0x8b, 0x48, 0x7, 0x84, 0x41, 0x6,
+    0x80, 0x1f, 0x89, 0xa0, 0x3, 0xfa, 0x11, 0x13,
+    0xdc, 0x70, 0xc, 0x6b, 0xc, 0xca, 0x88, 0x20,
+    0x5, 0x8, 0x78, 0xa8, 0xc5, 0x80, 0x13, 0x40,
+    0x7, 0xfb, 0x4c, 0x31, 0x51, 0x8b, 0x0, 0x3c,
+    0xcc, 0xa8, 0x82, 0x0,
+
+    /* U+26 "&" */
+    0x0, 0x26, 0x7e, 0xb0, 0x7, 0x15, 0x9b, 0xc,
+    0xa8, 0x6, 0xa0, 0xa9, 0xc1, 0xe0, 0xc, 0x40,
+    0xe0, 0x13, 0x80, 0x63, 0x7, 0x6, 0x1b, 0x0,
+    0xd4, 0x12, 0xf2, 0xae, 0x1, 0x8d, 0x8e, 0x1a,
+    0x80, 0x38, 0x90, 0x1, 0x40, 0x1c, 0x38, 0x50,
+    0x1a, 0x20, 0xbc, 0x70, 0x32, 0xf2, 0x34, 0x1a,
+    0x22, 0x40, 0x60, 0x65, 0x47, 0x51, 0x23, 0x10,
+    0xa, 0x8a, 0xa, 0x41, 0x5, 0x0, 0x2a, 0x0,
+    0x30, 0x40, 0x5d, 0x45, 0xc0, 0x84, 0x1, 0x6a,
+    0xa3, 0xb4, 0x71, 0xb2, 0x0,
+
+    /* U+27 "'" */
+    0x2f, 0x50, 0xe, 0x10, 0x3, 0x81, 0x88,
+
+    /* U+28 "(" */
+    0x0, 0xe1, 0x0, 0xd9, 0x20, 0x15, 0x8c, 0x80,
+    0x1d, 0x38, 0x40, 0x10, 0xa6, 0x0, 0x70, 0x90,
+    0xa, 0xc4, 0xc0, 0x2, 0x68, 0x1, 0x28, 0x68,
+    0x4, 0x40, 0x20, 0x10, 0x81, 0x80, 0x70, 0x80,
+    0x42, 0x2, 0x1, 0x18, 0x18, 0x4, 0xe1, 0xe0,
+    0x11, 0xa, 0x80, 0x67, 0x31, 0x0, 0xac, 0x24,
+    0x2, 0x25, 0x60, 0xd, 0x61, 0x40, 0x10, 0xea,
+    0xb8, 0x4, 0x7a, 0x80,
+
+    /* U+29 ")" */
+    0x20, 0xe, 0xe9, 0x0, 0xde, 0xd0, 0x1, 0x1c,
+    0x39, 0x80, 0x4e, 0x5e, 0x1, 0xa8, 0xcc, 0x1,
+    0x28, 0x50, 0x4, 0x42, 0x80, 0x19, 0x48, 0x40,
+    0x21, 0x2, 0x0, 0x8c, 0x1c, 0x2, 0x10, 0xe,
+    0x10, 0x70, 0x8, 0xc0, 0x80, 0x27, 0x11, 0x0,
+    0x44, 0x80, 0x12, 0x87, 0x80, 0x5c, 0x2a, 0x0,
+    0x34, 0x80, 0xb, 0x8d, 0x80, 0x14, 0x1a, 0x1,
+    0x7e, 0x8, 0x4,
+
+    /* U+2A "*" */
+    0x0, 0xd3, 0xe2, 0x1, 0xf0, 0x80, 0x80, 0x61,
+    0x0, 0x78, 0x6, 0x12, 0xeb, 0x41, 0x10, 0x36,
+    0xc0, 0xaa, 0xae, 0x47, 0xe4, 0xc0, 0xeb, 0xb0,
+    0x0, 0xdb, 0xd2, 0x1, 0x50, 0xab, 0x98, 0x6,
+    0x66, 0x45, 0x8d, 0x0, 0x43, 0x24, 0xc3, 0x8,
+    0xe0, 0x1, 0xbe, 0x0, 0x3b, 0xc0,
+
+    /* U+2B "+" */
+    0x0, 0xd1, 0x0, 0xf, 0xca, 0xc0, 0x1f, 0xfd,
+    0x6d, 0xff, 0x88, 0x7f, 0xee, 0x62, 0x28, 0x0,
+    0x45, 0xaf, 0x76, 0x21, 0xdd, 0xb0, 0x3, 0xff,
+    0xa4,
+
+    /* U+2C "," */
+    0xa, 0xf4, 0x1, 0x0, 0x9c, 0x18, 0x8, 0x49,
+    0x46, 0x1, 0x69, 0x80,
+
+    /* U+2D "-" */
+    0x78, 0x8f, 0x25, 0x3b, 0xfb, 0x40,
+
+    /* U+2E "." */
+    0x8, 0xc3, 0x17, 0x39, 0x14, 0xf,
+
+    /* U+2F "/" */
+    0x0, 0xf6, 0x68, 0x7, 0x88, 0xe8, 0x3, 0xd4,
+    0xc, 0x1, 0xe6, 0x41, 0x0, 0xe4, 0x1e, 0x0,
+    0xf7, 0x2, 0x80, 0x79, 0x58, 0x3, 0xcc, 0x14,
+    0x1, 0xed, 0x23, 0x0, 0xe1, 0x4a, 0x0, 0xf3,
+    0x2, 0x80, 0x7a, 0x90, 0x80, 0x38, 0xcb, 0x40,
+    0x3d, 0x40, 0xc0, 0x1e, 0x65, 0x0, 0xf2, 0x87,
+    0x0, 0x78,
+
+    /* U+30 "0" */
+    0x0, 0x25, 0xff, 0xb1, 0x0, 0x25, 0xb5, 0x66,
+    0x15, 0xa8, 0x2, 0xc7, 0xe6, 0x5e, 0x34, 0x8,
+    0x32, 0x20, 0x1, 0x90, 0x53, 0x2, 0x0, 0xc2,
+    0x1b, 0xe0, 0xc0, 0x14, 0x48, 0x8, 0x80, 0x21,
+    0xb7, 0x50, 0xe, 0x3c, 0x4b, 0x80, 0xd, 0x58,
+    0x1a, 0x80, 0x10, 0x83, 0x2e, 0x90, 0x8, 0x3,
+    0xc1, 0xe8, 0x3, 0x84, 0xc3, 0xc0, 0x32, 0x86,
+    0xa0, 0xc8, 0x80, 0x56, 0xa, 0x16, 0x3f, 0x32,
+    0xe2, 0x90, 0x2, 0xda, 0xb3, 0xa, 0xd8, 0x0,
+
+    /* U+31 "1" */
+    0x0, 0xc4, 0x80, 0x6, 0xcd, 0xc9, 0xf9, 0x30,
+    0x3, 0x25, 0xd8, 0x1, 0xd6, 0x8e, 0x0, 0x10,
+    0xf, 0xff, 0x78,
+
+    /* U+32 "2" */
+    0x0, 0xc, 0xf7, 0xf4, 0x0, 0x62, 0xf6, 0x56,
+    0x27, 0xd0, 0xa, 0x46, 0xed, 0x38, 0xa4, 0xe0,
+    0x4, 0x34, 0x0, 0xa0, 0x30, 0x5, 0xe4, 0x3,
+    0x18, 0x4, 0x30, 0xa0, 0x19, 0x3, 0x0, 0x3f,
+    0x40, 0x30, 0x7, 0xd2, 0x52, 0x20, 0x1e, 0x76,
+    0x56, 0x0, 0xf2, 0x41, 0xd0, 0x7, 0x8e, 0xcb,
+    0x40, 0x3c, 0x3a, 0x3e, 0x20, 0x1e, 0xc1, 0xd2,
+    0x0, 0xf5, 0x91, 0xa3, 0xbf, 0x18, 0x28, 0x1c,
+    0x47, 0x94,
+
+    /* U+33 "3" */
+    0x0, 0xc, 0xf7, 0xf4, 0x0, 0x43, 0xec, 0xae,
+    0xaf, 0xa0, 0xb, 0x1a, 0xb8, 0xb7, 0x26, 0x4,
+    0x15, 0x0, 0xa8, 0x30, 0x3b, 0x80, 0x1f, 0xfc,
+    0x2b, 0xf, 0x0, 0x85, 0xe7, 0x59, 0xd4, 0x2,
+    0x38, 0x62, 0x1c, 0x0, 0xc5, 0xfe, 0xb3, 0xb4,
+    0x0, 0xf2, 0x78, 0x78, 0x8, 0x80, 0x31, 0xa,
+    0x87, 0x60, 0x7, 0x9, 0x81, 0x92, 0x0, 0x4c,
+    0x8, 0x1c, 0x17, 0x68, 0xb9, 0x28, 0x2, 0xe6,
+    0x57, 0x57, 0xd1,
+
+    /* U+34 "4" */
+    0x0, 0xf1, 0xff, 0x80, 0x3f, 0x78, 0x7, 0xf3,
+    0x18, 0x7, 0xe1, 0x94, 0x30, 0xf, 0xac, 0x28,
+    0x3, 0xe4, 0x58, 0x10, 0xf, 0xa4, 0x9c, 0x3,
+    0xe7, 0x29, 0x0, 0xf8, 0xa1, 0x50, 0x3, 0xe9,
+    0xb, 0x0, 0xf8, 0xd0, 0x3b, 0xfe, 0x30, 0xff,
+    0xc, 0x47, 0x84, 0x1e, 0x9, 0xdf, 0xc4, 0x10,
+    0xe0, 0x1f, 0xfc, 0xa0,
+
+    /* U+35 "5" */
+    0x0, 0x7f, 0xfc, 0xa0, 0x20, 0x26, 0x7c, 0x20,
+    0x60, 0xd9, 0x9c, 0x80, 0xc1, 0xc0, 0x1f, 0x8,
+    0x18, 0x7, 0xc4, 0x7, 0x15, 0x6, 0x1, 0x78,
+    0x4b, 0xab, 0xe3, 0x80, 0x38, 0xa7, 0xb9, 0x21,
+    0x4, 0xd, 0xac, 0x22, 0x68, 0xa, 0x0, 0xf9,
+    0x40, 0xc0, 0x3e, 0x30, 0x0, 0xfd, 0x80, 0x62,
+    0x2, 0x13, 0x43, 0x0, 0xa0, 0x30, 0x38, 0x32,
+    0xa7, 0x51, 0xa, 0x5, 0xaa, 0x8c, 0xf, 0x60,
+
+    /* U+36 "6" */
+    0x0, 0x86, 0x37, 0xd4, 0x3, 0x27, 0x39, 0xa3,
+    0x0, 0x45, 0x61, 0x5d, 0x66, 0x1, 0x48, 0x52,
+    0x80, 0x70, 0xa1, 0xa8, 0x7, 0x90, 0x2c, 0x59,
+    0xd4, 0x2, 0x20, 0xde, 0x98, 0xad, 0x10, 0xe0,
+    0x58, 0xee, 0x31, 0x50, 0x5, 0xe, 0x22, 0x92,
+    0x41, 0x0, 0x20, 0x6, 0x50, 0x51, 0x6, 0x0,
+    0xde, 0x3, 0x81, 0xa0, 0x1b, 0x41, 0x90, 0x9c,
+    0x80, 0x4, 0xa2, 0x61, 0xc1, 0xb5, 0x4d, 0xa,
+    0x0, 0x1e, 0x22, 0xa9, 0x31, 0x0,
+
+    /* U+37 "7" */
+    0xef, 0xff, 0xd6, 0xec, 0xde, 0x40, 0x39, 0x9f,
+    0x88, 0x24, 0x3, 0xc2, 0xca, 0x20, 0x1e, 0x60,
+    0x90, 0xf, 0xa4, 0x8c, 0x3, 0xca, 0x36, 0x1,
+    0xf4, 0x8b, 0x0, 0x78, 0xcc, 0xc0, 0x1f, 0x48,
+    0x50, 0x7, 0x85, 0x50, 0x80, 0x3d, 0x21, 0xe0,
+    0x1f, 0x31, 0x20, 0x7, 0x98, 0x68, 0x3, 0xeb,
+    0x6, 0x0, 0xe0,
+
+    /* U+38 "8" */
+    0x0, 0x15, 0x77, 0xea, 0x80, 0x43, 0xaa, 0x8c,
+    0x15, 0x20, 0xb, 0xa, 0xa4, 0xe9, 0x31, 0x2,
+    0x2, 0x80, 0x54, 0x8, 0x6, 0x1, 0xf1, 0x82,
+    0x2, 0x80, 0x54, 0x8, 0x12, 0x75, 0x49, 0xd2,
+    0xa1, 0x0, 0x50, 0x2b, 0x11, 0xa0, 0x1, 0xe5,
+    0x77, 0xe8, 0xb0, 0x42, 0xa, 0x88, 0x16, 0xc9,
+    0x8c, 0x10, 0x3, 0x20, 0x60, 0x0, 0xc0, 0x31,
+    0x80, 0xc, 0x54, 0x80, 0x2b, 0xd, 0xa, 0xd,
+    0xa8, 0xc6, 0x36, 0x4, 0xc4, 0x57, 0x17, 0xc0,
+
+    /* U+39 "9" */
+    0x0, 0x26, 0x7f, 0x51, 0x0, 0x4d, 0x64, 0xca,
+    0xac, 0x10, 0x4, 0x8f, 0xcd, 0xc8, 0xd8, 0x28,
+    0x48, 0x80, 0x18, 0x94, 0x34, 0xc, 0x3, 0x28,
+    0x27, 0x80, 0x7b, 0x80, 0x48, 0xc, 0x3, 0x70,
+    0x1a, 0x4, 0x88, 0x0, 0xdc, 0xc, 0x5c, 0x7e,
+    0x6b, 0x4, 0x4, 0x22, 0x4d, 0x9e, 0x1c, 0x18,
+    0x0, 0xdb, 0xfa, 0xea, 0x24, 0x1, 0xe3, 0x33,
+    0x80, 0x79, 0x34, 0x60, 0x2, 0x5b, 0xeb, 0xd,
+    0x10, 0xb, 0x54, 0x9f, 0xcc, 0x0,
+
+    /* U+3A ":" */
+    0x5f, 0xb0, 0xf0, 0x42, 0x93, 0x62, 0x3c, 0x90,
+    0xf, 0xfe, 0x29, 0xe4, 0x4, 0x9b, 0x97, 0x81,
+    0x90,
+
+    /* U+3B ";" */
+    0x6, 0xfa, 0x0, 0x68, 0x28, 0x3, 0xcd, 0xc0,
+    0x9, 0x90, 0x1, 0xff, 0xcf, 0x4a, 0x60, 0x1,
+    0x2f, 0x0, 0x4, 0x3, 0x70, 0x60, 0x1, 0x9,
+    0x0, 0xf, 0xc0, 0x0,
+
+    /* U+3C "<" */
+    0x0, 0xf9, 0x2c, 0x3, 0x9b, 0x6d, 0x40, 0x2,
+    0xfd, 0x26, 0xd8, 0x33, 0xd0, 0x55, 0xd2, 0x48,
+    0xc3, 0x78, 0xa0, 0x12, 0x28, 0xdd, 0x20, 0x4,
+    0x35, 0xac, 0xb7, 0xae, 0x20, 0x2, 0x9e, 0x83,
+    0x8f, 0x0, 0xc2, 0xfd, 0x24, 0x1, 0xf3, 0x60,
+
+    /* U+3D "=" */
+    0x39, 0x9f, 0xc6, 0xec, 0xdf, 0x95, 0x3f, 0xff,
+    0x30, 0x7, 0xf8, 0xa6, 0x7f, 0x1b, 0x37, 0xf2,
+    0x80,
+
+    /* U+3E ">" */
+    0x3a, 0x30, 0xf, 0x9d, 0x73, 0xa, 0x1, 0xc9,
+    0x8c, 0x75, 0xae, 0x1, 0x8e, 0x7e, 0x9a, 0x3e,
+    0x44, 0x3, 0x2d, 0xe1, 0x32, 0x0, 0x65, 0xbc,
+    0x25, 0x40, 0x28, 0xea, 0x57, 0xea, 0x13, 0xd7,
+    0x39, 0xe8, 0x10, 0x3, 0xa5, 0xeb, 0x0, 0x72,
+    0x5a, 0x0, 0x7c,
+
+    /* U+3F "?" */
+    0x0, 0x1d, 0xf7, 0xea, 0x80, 0x4b, 0x88, 0xaa,
+    0x3a, 0x80, 0x5, 0x86, 0xdd, 0x78, 0xb8, 0x89,
+    0xe0, 0x80, 0x2, 0xe0, 0x43, 0x2e, 0x1, 0x8c,
+    0x4, 0x3, 0xc4, 0xa4, 0x40, 0xf, 0x70, 0x48,
+    0x7, 0xb0, 0xe1, 0x0, 0x3a, 0x4d, 0xdc, 0x1,
+    0xe7, 0x18, 0x0, 0xf8, 0x9c, 0x3, 0xf6, 0x48,
+    0x7, 0xe1, 0x10, 0x7, 0xc3, 0xde, 0x1, 0xf8,
+    0x48, 0x3, 0x0,
+
+    /* U+40 "@" */
+    0x0, 0xd1, 0xbf, 0xae, 0x1, 0xc3, 0xab, 0x76,
+    0xa9, 0xb0, 0xd, 0x4d, 0xac, 0x8f, 0xea, 0xc0,
+    0x4, 0x5b, 0x9, 0xfd, 0x3b, 0xb0, 0x3, 0xe4,
+    0x25, 0x2d, 0x95, 0x44, 0x20, 0x8a, 0x2d, 0xc8,
+    0x2, 0x4, 0x43, 0x2, 0x41, 0x30, 0x72, 0x1,
+    0x77, 0x8, 0x12, 0x80, 0x5, 0xc0, 0x21, 0x30,
+    0xe2, 0x0, 0x10, 0x80, 0xb0, 0x98, 0x0, 0xc0,
+    0x40, 0xc4, 0xc9, 0x44, 0x5e, 0x88, 0xa0, 0x29,
+    0x40, 0x12, 0x67, 0xb, 0x26, 0xc5, 0xb0, 0x5,
+    0xc9, 0xf7, 0x26, 0x5d, 0xa2, 0x0, 0x64, 0xd8,
+    0x44, 0x3a, 0x80, 0x75, 0x4a, 0x55, 0xd9, 0xc0,
+    0x20,
+
+    /* U+41 "A" */
+    0x0, 0xec, 0xf0, 0xf, 0xe1, 0x30, 0x50, 0xf,
+    0xce, 0x0, 0xf0, 0xf, 0xda, 0x8, 0x80, 0xf,
+    0xc8, 0xba, 0x26, 0x1, 0xe4, 0xc, 0x70, 0xb0,
+    0xf, 0x68, 0x38, 0x92, 0x80, 0x79, 0xcc, 0x41,
+    0x48, 0x80, 0x18, 0xc6, 0xc0, 0x16, 0xa, 0x1,
+    0xac, 0x32, 0x66, 0xc, 0x0, 0xca, 0x8, 0xcc,
+    0x50, 0x41, 0x0, 0x11, 0x1b, 0xff, 0x50, 0x20,
+    0x1, 0x43, 0x40, 0x32, 0x7, 0x80, 0x30, 0x10,
+    0x3, 0x9, 0xa0, 0xa, 0x20, 0x3, 0xc8, 0x28,
+
+    /* U+42 "B" */
+    0x4f, 0xfd, 0xd8, 0xa0, 0x18, 0xd9, 0x88, 0x55,
+    0x40, 0xa, 0xe6, 0x55, 0xc6, 0xa8, 0x1, 0xf4,
+    0x86, 0x0, 0x7c, 0x61, 0xe0, 0x1e, 0x1b, 0x5,
+    0x0, 0x5c, 0x42, 0x7c, 0xa8, 0x80, 0x6, 0xee,
+    0x61, 0x36, 0x0, 0xa3, 0xfe, 0xb1, 0xc3, 0x0,
+    0xf2, 0x70, 0x40, 0x7, 0xc6, 0xa, 0x1, 0xf0,
+    0x81, 0x80, 0x7d, 0x0, 0xa0, 0xb, 0x88, 0x4e,
+    0xb1, 0xc0, 0x0, 0xdd, 0xcc, 0x11, 0x80,
+
+    /* U+43 "C" */
+    0x0, 0x15, 0xff, 0xb1, 0x80, 0x24, 0xd5, 0x53,
+    0x14, 0xc8, 0x1, 0x43, 0xf5, 0x3c, 0x6c, 0x6c,
+    0x30, 0x20, 0x17, 0x84, 0xe8, 0x38, 0x6, 0x35,
+    0x36, 0x11, 0x0, 0x75, 0x49, 0x18, 0x7, 0xff,
+    0x40, 0x8c, 0x3, 0xf3, 0x8, 0x80, 0x3a, 0x63,
+    0x41, 0xc0, 0x31, 0xb1, 0x30, 0xc0, 0x80, 0x50,
+    0x12, 0x14, 0x3f, 0x32, 0xd4, 0x73, 0x4, 0xc5,
+    0x76, 0x19, 0x80,
+
+    /* U+44 "D" */
+    0x7f, 0xfb, 0xb1, 0x80, 0x3c, 0xae, 0xe1, 0x9d,
+    0x10, 0xd, 0xf1, 0x3b, 0x25, 0x80, 0x1f, 0x99,
+    0x84, 0xc0, 0x1f, 0xa0, 0x34, 0x3, 0xf0, 0x92,
+    0x0, 0x7f, 0x8, 0x7, 0xf9, 0xc0, 0x40, 0x3f,
+    0x38, 0x8, 0x7, 0xe1, 0x0, 0xfe, 0x12, 0x40,
+    0xf, 0xd0, 0x1a, 0x1, 0xf3, 0xb1, 0xb0, 0x5,
+    0xf1, 0x3b, 0x5, 0xa0, 0x19, 0x5d, 0xc3, 0x3a,
+    0x20, 0x0,
+
+    /* U+45 "E" */
+    0x3f, 0xff, 0xcc, 0x0, 0x26, 0x6f, 0x28, 0x1,
+    0x26, 0x7c, 0x60, 0x1f, 0xfd, 0xe6, 0xff, 0xe8,
+    0x0, 0x89, 0xdf, 0xb0, 0x2, 0x48, 0x8e, 0x40,
+    0xf, 0xfe, 0xaa, 0x44, 0x79, 0x0, 0x4, 0xef,
+    0xec,
+
+    /* U+46 "F" */
+    0x2f, 0xff, 0xd2, 0x0, 0x26, 0x6f, 0x60, 0x1,
+    0xe6, 0x7c, 0xa0, 0x1f, 0xfd, 0xe5, 0xff, 0xe9,
+    0x0, 0x89, 0xdf, 0xb0, 0x2, 0x78, 0x8e, 0x50,
+    0xf, 0xff, 0x38,
+
+    /* U+47 "G" */
+    0x0, 0x8a, 0xff, 0xd8, 0xa0, 0x19, 0x35, 0x10,
+    0xa5, 0x52, 0x1, 0x50, 0xed, 0xd7, 0x1b, 0x20,
+    0x38, 0xc1, 0x0, 0x5e, 0x1e, 0x18, 0xe, 0x1,
+    0x8e, 0x78, 0x14, 0x44, 0x1, 0xcc, 0xa0, 0x24,
+    0x1, 0xff, 0xc2, 0x68, 0x89, 0xc0, 0x3d, 0xae,
+    0xf4, 0x80, 0x90, 0x5, 0x7f, 0xe2, 0x0, 0x28,
+    0x88, 0x3, 0xf6, 0x84, 0x80, 0x7e, 0x62, 0x74,
+    0x0, 0x88, 0x80, 0x17, 0x8d, 0xda, 0x6f, 0x42,
+    0x80, 0x5, 0xec, 0xac, 0xc7, 0xd4,
+
+    /* U+48 "H" */
+    0x9f, 0x10, 0xc, 0x3f, 0x20, 0x1f, 0xff, 0x2e,
+    0xff, 0xdc, 0x1, 0x99, 0xdf, 0x30, 0x6, 0x88,
+    0xf0, 0x7, 0xff, 0xa0,
+
+    /* U+49 "I" */
+    0x4f, 0xff, 0xc8, 0xcd, 0x80, 0xc, 0xd8, 0xa6,
+    0x60, 0x19, 0x98, 0x80, 0x3f, 0xff, 0xe0, 0x1f,
+    0xfc, 0xd2, 0x99, 0x80, 0x66, 0x62, 0x66, 0xc0,
+    0x6, 0x6c,
+
+    /* U+4A "J" */
+    0x0, 0xfd, 0x3e, 0x60, 0x1f, 0xff, 0xf0, 0xf,
+    0xfe, 0x6b, 0xb0, 0x7, 0x18, 0x5, 0x52, 0x1,
+    0xce, 0x6, 0x14, 0x12, 0x1, 0x39, 0x28, 0x1,
+    0xcd, 0xb6, 0x72, 0xa, 0xc0, 0x2c, 0x80, 0x62,
+    0x6c, 0x10,
+
+    /* U+4B "K" */
+    0x4f, 0x80, 0xc, 0x9f, 0xa0, 0x1f, 0x15, 0x7,
+    0x80, 0x7d, 0xc3, 0x44, 0x1, 0xe9, 0x36, 0x50,
+    0xf, 0x2b, 0x14, 0x80, 0x78, 0xa8, 0x3c, 0x3,
+    0xc3, 0xc1, 0x4, 0x1, 0xe6, 0x30, 0xa0, 0xf,
+    0xc8, 0xa5, 0x0, 0x1e, 0x2a, 0xb1, 0x72, 0x0,
+    0xe5, 0x11, 0x40, 0x70, 0x7, 0xe6, 0x33, 0x30,
+    0x7, 0xee, 0x8, 0x10, 0xf, 0x89, 0xc6, 0xc0,
+    0x3f, 0x41, 0x2a, 0x0,
+
+    /* U+4C "L" */
+    0xf, 0xb0, 0xf, 0xff, 0xf8, 0x7, 0xff, 0xa9,
+    0x62, 0x3c, 0xc0, 0x1, 0x77, 0xf6, 0x0,
+
+    /* U+4D "M" */
+    0x8f, 0xd0, 0xd, 0x5f, 0x60, 0x2, 0x20, 0x4,
+    0xa0, 0x1c, 0xa0, 0x5, 0x0, 0xe2, 0xb0, 0x7,
+    0x88, 0x80, 0x24, 0x31, 0x5, 0x60, 0xd, 0xa0,
+    0xea, 0x16, 0x1, 0x98, 0xb7, 0xc4, 0xc4, 0x3,
+    0x2a, 0x2b, 0x80, 0x7a, 0xc0, 0x1a, 0x1, 0xc2,
+    0x62, 0x24, 0x0, 0xf9, 0x98, 0x1, 0xfa, 0x20,
+    0x1, 0xff, 0xd6,
+
+    /* U+4E "N" */
+    0x9f, 0x70, 0xc, 0x7f, 0x20, 0x9, 0x0, 0xfe,
+    0x17, 0x0, 0xfe, 0x90, 0xf, 0xca, 0x2e, 0x1,
+    0xf7, 0xc, 0x80, 0x7c, 0xf0, 0x2c, 0x1, 0xf3,
+    0xc, 0x0, 0x7e, 0x81, 0x60, 0xf, 0x98, 0x61,
+    0xc0, 0x3e, 0x91, 0xe0, 0xf, 0x9c, 0x54, 0x3,
+    0xf4, 0x80, 0x7f, 0x38, 0x80, 0x7f, 0x48, 0x0,
+
+    /* U+4F "O" */
+    0x0, 0x1d, 0xff, 0xac, 0x80, 0x24, 0xc4, 0x33,
+    0x26, 0x98, 0x2, 0x87, 0x73, 0x20, 0xd0, 0x61,
+    0x92, 0x0, 0x1c, 0xb, 0x60, 0x30, 0x6, 0x60,
+    0xc7, 0x11, 0x0, 0x61, 0x13, 0x91, 0x80, 0x78,
+    0xcc, 0x2, 0x1, 0xf0, 0x80, 0x80, 0x7c, 0x24,
+    0x60, 0x1e, 0x33, 0x38, 0x88, 0x3, 0x8, 0x9f,
+    0x1, 0x80, 0x33, 0x6, 0x30, 0xc1, 0x80, 0xa,
+    0x45, 0x82, 0x83, 0x2e, 0xda, 0x34, 0x0, 0x4d,
+    0x44, 0xd8, 0x80,
+
+    /* U+50 "P" */
+    0x2f, 0xfe, 0xe9, 0x10, 0xc, 0x4e, 0xf2, 0xb7,
+    0x90, 0x4, 0xf1, 0x15, 0xc8, 0xc8, 0x7, 0xe6,
+    0x24, 0x10, 0xf, 0xce, 0x6, 0x1, 0xf9, 0x80,
+    0xc0, 0x3e, 0x53, 0x41, 0x0, 0x3c, 0x45, 0x74,
+    0x32, 0x1, 0x13, 0xbc, 0xad, 0xe4, 0x1, 0x2f,
+    0xfd, 0xd2, 0x20, 0x1f, 0xfe, 0xd0,
+
+    /* U+51 "Q" */
+    0x0, 0x8e, 0xff, 0xd6, 0x60, 0x1c, 0x98, 0x86,
+    0x64, 0xc4, 0x0, 0x86, 0xc7, 0x73, 0x1a, 0x36,
+    0x20, 0x6, 0x8, 0x20, 0x1, 0x58, 0x30, 0x2,
+    0xc1, 0x80, 0x32, 0x85, 0x80, 0xc, 0x80, 0x3c,
+    0x46, 0x1, 0x30, 0x7, 0x98, 0x0, 0x20, 0x1f,
+    0xe1, 0x10, 0x7, 0xf8, 0x40, 0xc, 0x1, 0xe6,
+    0x0, 0x8c, 0x80, 0x3c, 0x46, 0x0, 0xb0, 0x50,
+    0xc, 0xa1, 0x60, 0x6, 0xb, 0x20, 0x1, 0x58,
+    0x30, 0x0, 0x6c, 0x76, 0xed, 0xa3, 0x42, 0x1,
+    0x26, 0x22, 0x42, 0x1a, 0x1, 0xc7, 0x7f, 0xf1,
+    0xbd, 0x0, 0x7e, 0x1c, 0x47, 0x10, 0xf, 0xeb,
+    0xd1,
+
+    /* U+52 "R" */
+    0x3f, 0xfe, 0xc6, 0x0, 0xe3, 0x77, 0x31, 0x4d,
+    0x0, 0x64, 0x88, 0x4f, 0x1a, 0xa8, 0x3, 0xf7,
+    0x87, 0x80, 0x7e, 0x20, 0x10, 0xf, 0xc4, 0x2,
+    0x1, 0xfb, 0xc3, 0x80, 0x24, 0x88, 0x4f, 0x1b,
+    0x20, 0x4, 0x6e, 0xe6, 0x19, 0x90, 0x6, 0x7f,
+    0xf5, 0x7, 0x0, 0x7e, 0x51, 0x71, 0x0, 0xfd,
+    0x0, 0xc0, 0x1f, 0x98, 0x64, 0x3, 0xfa, 0x45,
+    0xc0, 0x3f, 0x30, 0x48, 0x0,
+
+    /* U+53 "S" */
+    0x0, 0x1d, 0xf7, 0xe2, 0x80, 0x65, 0xc4, 0x55,
+    0x15, 0x58, 0x0, 0x68, 0x76, 0xeb, 0x91, 0xe,
+    0x8, 0xc, 0x40, 0x14, 0x85, 0x0, 0x42, 0x1,
+    0x8a, 0x6c, 0x10, 0x19, 0x40, 0x33, 0x30, 0x6,
+    0xc2, 0xb1, 0x84, 0x3, 0x93, 0x50, 0xe7, 0xa0,
+    0x3, 0x8a, 0xfa, 0x5, 0xf4, 0x3, 0xc2, 0xfc,
+    0xa5, 0x40, 0xac, 0x1, 0xd4, 0xa, 0x1d, 0x28,
+    0x1, 0xfb, 0xc2, 0x44, 0x2, 0x70, 0x40, 0x47,
+    0x2e, 0xa9, 0xc8, 0x19, 0x0, 0x45, 0xa2, 0x18,
+    0x63, 0xc8, 0x0,
+
+    /* U+54 "T" */
+    0x3f, 0xff, 0xf2, 0xb, 0x36, 0x0, 0x33, 0x71,
+    0x4c, 0xe2, 0x19, 0x9c, 0x40, 0x1f, 0xff, 0xf0,
+    0xf, 0xff, 0xc8,
+
+    /* U+55 "U" */
+    0xaf, 0x10, 0xc, 0x5f, 0x20, 0x1f, 0xfc, 0x73,
+    0x0, 0xff, 0xef, 0x18, 0x7, 0xff, 0x3c, 0xc0,
+    0x40, 0x30, 0x81, 0xf8, 0x20, 0x6, 0x40, 0xf7,
+    0x9, 0x20, 0x1, 0x48, 0x38, 0xd0, 0xed, 0x53,
+    0x46, 0x84, 0x17, 0x11, 0x54, 0x98, 0xa0,
+
+    /* U+56 "V" */
+    0x2f, 0xc0, 0xf, 0x6f, 0x89, 0x10, 0xc0, 0x38,
+    0x48, 0xc4, 0x10, 0x14, 0x3, 0x38, 0x58, 0x3,
+    0x43, 0x0, 0x36, 0x2, 0x0, 0x10, 0x1c, 0x3,
+    0x20, 0x98, 0x4, 0xa2, 0x40, 0x3, 0x17, 0x0,
+    0xde, 0x8, 0x0, 0xb0, 0xd0, 0xc, 0x81, 0xa0,
+    0x4, 0x4, 0x0, 0xc2, 0x68, 0x2, 0x68, 0x1,
+    0xeb, 0x4, 0x40, 0x68, 0x7, 0x94, 0x33, 0xc1,
+    0xc0, 0x3c, 0x44, 0x54, 0x31, 0x0, 0xf9, 0x8,
+    0x50, 0x3, 0xf6, 0x80, 0x2c, 0x3, 0xf2, 0x0,
+    0x98, 0x6,
+
+    /* U+57 "W" */
+    0x3f, 0x70, 0x5, 0xf8, 0x0, 0xfd, 0xc8, 0x38,
+    0x0, 0xa0, 0x40, 0xc0, 0x42, 0x6, 0x2, 0x20,
+    0x70, 0x30, 0x10, 0x16, 0x2, 0x0, 0x68, 0x70,
+    0x30, 0x11, 0x1, 0x40, 0xc8, 0x4, 0x8, 0x18,
+    0x43, 0xc9, 0x5c, 0x8, 0x40, 0x4, 0x2, 0x4f,
+    0xe4, 0xc, 0x40, 0xe, 0x3, 0x52, 0x20, 0x11,
+    0xb0, 0x0, 0x81, 0xc7, 0x54, 0x1c, 0x48, 0x0,
+    0xe1, 0x80, 0xc2, 0x2c, 0xf, 0x0, 0x10, 0x38,
+    0x18, 0x13, 0x81, 0x0, 0x4, 0x4, 0x80, 0xa,
+    0x20, 0xc0, 0x11, 0x3, 0x0, 0x38, 0x0, 0x40,
+    0x13, 0x1, 0x80, 0xc, 0x0, 0x20, 0x11, 0x7,
+    0x0, 0x14, 0x8, 0x0,
+
+    /* U+58 "X" */
+    0xc, 0xf5, 0x0, 0xc3, 0xfe, 0x10, 0xf0, 0x80,
+    0xd, 0x61, 0x2, 0x6, 0xa4, 0xc0, 0x2, 0x51,
+    0x70, 0xa, 0x2, 0x0, 0x12, 0x16, 0x1, 0x89,
+    0xc5, 0xcd, 0xd, 0x40, 0x3a, 0x46, 0x7c, 0x3c,
+    0x3, 0xc3, 0x2, 0x68, 0x60, 0x1f, 0x38, 0x3,
+    0x80, 0x3f, 0x48, 0x2, 0x40, 0x3e, 0x17, 0x26,
+    0x35, 0x0, 0xf5, 0x84, 0x40, 0x20, 0x3, 0x8d,
+    0x49, 0x45, 0xc9, 0x80, 0x37, 0x84, 0x80, 0x24,
+    0x20, 0x40, 0xa, 0x66, 0x40, 0x0, 0xb8, 0xc8,
+    0x2, 0x3, 0xc0, 0x34, 0xb, 0x90,
+
+    /* U+59 "Y" */
+    0x2f, 0xd0, 0xe, 0x1f, 0xe0, 0x24, 0x25, 0x0,
+    0xd2, 0x12, 0x0, 0x80, 0x90, 0xc, 0xc0, 0xc0,
+    0x3, 0x3c, 0x0, 0x61, 0x71, 0x0, 0xa0, 0x24,
+    0x1, 0x61, 0x20, 0x19, 0x9, 0x45, 0x49, 0x84,
+    0x3, 0xa0, 0x26, 0x41, 0x60, 0x1e, 0x52, 0x73,
+    0x52, 0x0, 0xfa, 0xc0, 0x12, 0x1, 0xf9, 0x80,
+    0xcc, 0x1, 0xff, 0xd6, 0x70, 0xf, 0xfe, 0x88,
+
+    /* U+5A "Z" */
+    0xcf, 0xff, 0xc9, 0x6c, 0xde, 0x0, 0x33, 0xcc,
+    0xf6, 0x2, 0x90, 0x7, 0xac, 0x2c, 0x3, 0xd0,
+    0x30, 0x20, 0x1c, 0x4e, 0x4e, 0x1, 0xe9, 0x9,
+    0x0, 0xf2, 0x21, 0x50, 0x3, 0xd2, 0x16, 0x1,
+    0xe7, 0x28, 0x10, 0xe, 0x18, 0x27, 0x0, 0xf5,
+    0x84, 0x0, 0x79, 0x15, 0x14, 0x3, 0xd0, 0x0,
+    0x88, 0xf2, 0x8, 0x23, 0xbf, 0xb0,
+
+    /* U+5B "[" */
+    0x68, 0x88, 0x2d, 0xde, 0x0, 0x17, 0xf8, 0x3,
+    0xff, 0xfe, 0x0, 0x28, 0x80, 0x4, 0xee, 0x0,
+
+    /* U+5C "\\" */
+    0x9f, 0x10, 0xe, 0xa0, 0x60, 0xe, 0x32, 0xa0,
+    0xf, 0x51, 0x18, 0x7, 0x30, 0x58, 0x7, 0xa,
+    0x30, 0x7, 0xb8, 0x50, 0x3, 0x94, 0x78, 0x3,
+    0xce, 0xa2, 0x1, 0xd4, 0xe, 0x1, 0xc6, 0x54,
+    0x1, 0xea, 0x32, 0x0, 0xe6, 0xa, 0x0, 0xe1,
+    0x46, 0x0, 0xf7, 0xa, 0x0, 0x72, 0x87, 0x0,
+
+    /* U+5D "]" */
+    0x8, 0x89, 0x81, 0xde, 0xb0, 0xff, 0x10, 0x7,
+    0xff, 0xfc, 0x1, 0x10, 0x20, 0x3, 0xb8, 0x0,
+
+    /* U+5E "^" */
+    0x0, 0xb7, 0x40, 0x1c, 0x64, 0x43, 0x0, 0xd4,
+    0x0, 0xa0, 0xc, 0xca, 0xa6, 0x0, 0x98, 0x3b,
+    0x80, 0xa0, 0xa, 0x14, 0x40, 0xc8, 0x11, 0xb0,
+    0x1, 0x8c, 0xa8, 0x28, 0x1, 0x41, 0x40,
+
+    /* U+5F "_" */
+    0x37, 0x7f, 0xc6, 0x91, 0x1f, 0x90,
+
+    /* U+60 "`" */
+    0x57, 0x30, 0x4a, 0xe0, 0x1f, 0x39,
+
+    /* U+61 "a" */
+    0x0, 0x26, 0x7f, 0x62, 0x80, 0x4d, 0x62, 0xee,
+    0x3a, 0x60, 0x19, 0x2d, 0x89, 0xd0, 0x90, 0x4,
+    0x48, 0x4, 0x48, 0x4, 0x2e, 0x80, 0x18, 0x40,
+    0x21, 0x9d, 0xff, 0x94, 0x2, 0xc6, 0x4a, 0xbc,
+    0x40, 0x3, 0x14, 0x4a, 0xa1, 0x88, 0x7, 0xe1,
+    0x70, 0x3, 0x8c, 0x4b, 0xcf, 0x90, 0x8, 0xb1,
+    0x5e, 0x16, 0x1c, 0x14,
+
+    /* U+62 "b" */
+    0x4f, 0x80, 0xf, 0xfe, 0xe3, 0xef, 0xeb, 0x0,
+    0x67, 0x87, 0x53, 0x97, 0x0, 0x87, 0x6a, 0x98,
+    0x30, 0x20, 0x6, 0x20, 0x1, 0x48, 0x38, 0x7,
+    0xc8, 0x1e, 0x1, 0xf0, 0x81, 0x80, 0x7c, 0x20,
+    0x60, 0x1f, 0x28, 0x78, 0x1, 0x40, 0x35, 0x83,
+    0x80, 0xb, 0x5d, 0xb0, 0xa0, 0x40, 0x10, 0xb3,
+    0x21, 0x97, 0x0,
+
+    /* U+63 "c" */
+    0x0, 0x1d, 0xf7, 0xea, 0x80, 0x49, 0x88, 0xec,
+    0x15, 0x20, 0xa, 0xc, 0x99, 0x6a, 0x31, 0xa8,
+    0xb9, 0x80, 0x5e, 0x4b, 0xa1, 0x80, 0x19, 0x35,
+    0x84, 0x1c, 0x3, 0xe1, 0x7, 0x0, 0xfb, 0x43,
+    0x0, 0x31, 0x42, 0x28, 0xb9, 0x0, 0x50, 0xee,
+    0xa, 0xd, 0x98, 0xd5, 0x73, 0x4, 0xc4, 0x77,
+    0xd, 0xc0, 0x0,
+
+    /* U+64 "d" */
+    0x0, 0xfa, 0x3d, 0x0, 0x3f, 0xfa, 0x8b, 0xbf,
+    0xce, 0x1, 0x9a, 0x89, 0x52, 0x1c, 0x0, 0x32,
+    0x3b, 0x54, 0xd1, 0x0, 0x38, 0x31, 0x0, 0x9,
+    0x80, 0x1e, 0x18, 0x1, 0xf1, 0x83, 0x80, 0x7c,
+    0x60, 0xe0, 0x1f, 0x78, 0x60, 0x7, 0xce, 0xc,
+    0x40, 0x1, 0x50, 0x0, 0xc8, 0xed, 0x53, 0xc8,
+    0x2, 0x6a, 0x25, 0x46, 0x80, 0x0,
+
+    /* U+65 "e" */
+    0x0, 0x15, 0x77, 0xe2, 0x80, 0x47, 0xaa, 0x8e,
+    0x55, 0x0, 0xd, 0x1d, 0xa8, 0xe3, 0x72, 0x61,
+    0x92, 0x0, 0xa4, 0x17, 0xc3, 0x26, 0x77, 0x87,
+    0x18, 0x23, 0x36, 0x50, 0x30, 0x6, 0x7f, 0xfa,
+    0xb4, 0x2c, 0x3, 0xe6, 0x7, 0x40, 0x8, 0xac,
+    0x86, 0xc2, 0xea, 0x2b, 0x54, 0xc1, 0x35, 0x51,
+    0xde, 0xf1,
+
+    /* U+66 "f" */
+    0x0, 0xe2, 0x68, 0x74, 0x0, 0xe7, 0xd9, 0x78,
+    0xb0, 0xc, 0x70, 0x57, 0xfe, 0xd0, 0xd, 0x61,
+    0x8, 0x0, 0x20, 0xc, 0x20, 0xc0, 0x1d, 0x1f,
+    0xe6, 0xc, 0xff, 0x90, 0x2e, 0x64, 0x60, 0xf3,
+    0x32, 0x81, 0xb3, 0x14, 0x2d, 0x9a, 0x10, 0xf,
+    0xff, 0xf8, 0x7, 0xff, 0x8,
+
+    /* U+67 "g" */
+    0x0, 0x36, 0xff, 0x43, 0xfa, 0x3, 0xc8, 0x44,
+    0xa4, 0x0, 0x6, 0x7, 0x1d, 0xd8, 0x60, 0x7,
+    0x9, 0x10, 0x9, 0x0, 0x1e, 0x6, 0x1, 0xfc,
+    0xe0, 0x1f, 0xce, 0x1, 0xf7, 0x86, 0x0, 0x7c,
+    0xe0, 0xc4, 0x0, 0x16, 0x0, 0xc, 0x8e, 0xd5,
+    0x3c, 0x40, 0x26, 0xa2, 0x57, 0x67, 0x0, 0xcb,
+    0xbf, 0xb0, 0x40, 0xc1, 0xa, 0x1, 0x12, 0x91,
+    0x0, 0xea, 0xe2, 0xb4, 0x24, 0x1, 0x72, 0xee,
+    0x54, 0xc4, 0x0,
+
+    /* U+68 "h" */
+    0x4f, 0x70, 0xf, 0xfe, 0xe1, 0xdf, 0xf4, 0x88,
+    0x5, 0x78, 0xc, 0x6d, 0xa0, 0x11, 0x6d, 0xce,
+    0x91, 0x98, 0x0, 0xc4, 0x1, 0x50, 0x28, 0x3,
+    0xc0, 0x30, 0x80, 0x7f, 0x18, 0x7, 0xff, 0xa0,
+
+    /* U+69 "i" */
+    0x0, 0xcd, 0xe8, 0x1, 0xf7, 0x1, 0x0, 0x7d,
+    0x1c, 0xc0, 0x1f, 0x84, 0x3, 0xbf, 0xf9, 0x80,
+    0x33, 0x34, 0x60, 0x1e, 0x99, 0xa8, 0x3, 0xff,
+    0xed, 0x33, 0x50, 0x54, 0xc9, 0xc1, 0x9a, 0x30,
+    0x36, 0x65, 0x0,
+
+    /* U+6A "j" */
+    0x0, 0xd3, 0xc4, 0x1, 0x8c, 0x44, 0x1, 0xab,
+    0x8c, 0x3, 0x84, 0x7, 0xff, 0x8c, 0x59, 0xa2,
+    0x0, 0xa6, 0x65, 0x0, 0xff, 0xf9, 0x10, 0x7,
+    0xa, 0x81, 0xc4, 0x27, 0xc2, 0x1, 0x5d, 0x8a,
+    0x9c, 0x0,
+
+    /* U+6B "k" */
+    0x4f, 0x80, 0xf, 0xff, 0x1a, 0xfe, 0x88, 0x7,
+    0x92, 0x8b, 0x4, 0x3, 0x92, 0xc7, 0xc4, 0x3,
+    0x8e, 0xc7, 0x8, 0x3, 0x8b, 0x42, 0xc8, 0x3,
+    0xca, 0x21, 0x20, 0x1f, 0xad, 0x4e, 0x40, 0x3c,
+    0xe9, 0x64, 0xca, 0x1, 0xf0, 0xf0, 0x51, 0x0,
+    0x7c, 0x72, 0x1e, 0x1, 0xf9, 0x94, 0xa8, 0x0,
+
+    /* U+6C "l" */
+    0xf, 0xfe, 0x60, 0xc, 0xcd, 0x18, 0x7, 0xa6,
+    0x6a, 0x0, 0xff, 0xff, 0x80, 0x7f, 0xf4, 0xe6,
+    0x6a, 0xa, 0x99, 0x38, 0x33, 0x46, 0x6, 0xcc,
+    0xa0,
+
+    /* U+6D "m" */
+    0x1f, 0x9b, 0xfd, 0x5b, 0xfd, 0x30, 0x9, 0xb1,
+    0xca, 0x8a, 0xb, 0x80, 0x25, 0x78, 0x11, 0x4b,
+    0xa9, 0x0, 0x46, 0x0, 0x33, 0x0, 0xc, 0x4,
+    0x3, 0xff, 0xfe, 0x1, 0xfc,
+
+    /* U+6E "n" */
+    0x4f, 0x54, 0xcf, 0xd9, 0x10, 0xb, 0xad, 0x98,
+    0xd, 0xa0, 0x12, 0xed, 0x4e, 0x99, 0x88, 0x0,
+    0xc4, 0x1, 0x58, 0x38, 0x3, 0xc0, 0x30, 0x81,
+    0x80, 0x7f, 0xfc, 0x0,
+
+    /* U+6F "o" */
+    0x0, 0x25, 0xff, 0xad, 0x0, 0x26, 0xb5, 0x66,
+    0x2d, 0xb0, 0x14, 0x97, 0xcc, 0xbc, 0xa4, 0xa8,
+    0x2c, 0x40, 0x3, 0x61, 0x46, 0xe, 0x1, 0x90,
+    0xd, 0xc0, 0x40, 0x31, 0x3, 0xb8, 0x4, 0x3,
+    0x8, 0x39, 0x82, 0x0, 0x64, 0x3, 0xa0, 0x81,
+    0x0, 0xc, 0x5, 0x14, 0x97, 0xcc, 0xbc, 0xa4,
+    0x81, 0xac, 0x99, 0x85, 0x6c, 0x0,
+
+    /* U+70 "p" */
+    0x4f, 0x67, 0xdf, 0xd6, 0x0, 0xd1, 0x2e, 0xa5,
+    0x2e, 0x1, 0x1f, 0xd5, 0x30, 0x20, 0x40, 0xa,
+    0x20, 0x3, 0x70, 0x70, 0x7, 0x80, 0x6c, 0xe,
+    0x0, 0xf9, 0xc0, 0x40, 0x3e, 0x70, 0x10, 0xf,
+    0xb0, 0x34, 0x1, 0x60, 0x11, 0x30, 0x20, 0x0,
+    0xf6, 0x65, 0xa3, 0x2, 0x0, 0x75, 0x76, 0x29,
+    0x70, 0xb, 0xe3, 0xbf, 0x58, 0x3, 0xff, 0xa8,
+
+    /* U+71 "q" */
+    0x0, 0x2e, 0xff, 0x4c, 0x7a, 0x3, 0xd0, 0x4c,
+    0x2b, 0x80, 0x6, 0x7, 0x19, 0x98, 0x80, 0x7,
+    0x9, 0x10, 0x8, 0xc0, 0x1e, 0x6, 0x1, 0xfc,
+    0xe0, 0x1f, 0xce, 0x1, 0xf7, 0x86, 0x0, 0x7c,
+    0xe0, 0xc4, 0x0, 0x15, 0x0, 0xc, 0xe, 0x4c,
+    0xbc, 0x80, 0x27, 0xa3, 0x67, 0x67, 0x0, 0xcb,
+    0xbf, 0xd0, 0x1, 0xff, 0xd5,
+
+    /* U+72 "r" */
+    0xcf, 0x6, 0xdf, 0xe5, 0x0, 0x4c, 0x88, 0x82,
+    0x20, 0x3, 0xdf, 0xef, 0xa0, 0x2, 0xd0, 0x3,
+    0xca, 0x1, 0xff, 0xe9,
+
+    /* U+73 "s" */
+    0x0, 0x1d, 0xf7, 0xeb, 0x80, 0x49, 0x8a, 0xec,
+    0x11, 0x60, 0x9, 0xf, 0x99, 0x6a, 0x24, 0x1,
+    0x8, 0x5, 0x34, 0xc1, 0x61, 0xce, 0x60, 0x4a,
+    0x40, 0xd6, 0xb1, 0x9f, 0x44, 0x1, 0x25, 0xfd,
+    0xb2, 0xe0, 0x93, 0xa0, 0x1, 0x26, 0x42, 0xc7,
+    0x12, 0x20, 0x10, 0x80, 0x8a, 0xb, 0xe6, 0x2e,
+    0x9, 0x81, 0xe9, 0x59, 0xd9, 0xf0, 0x0,
+
+    /* U+74 "t" */
+    0x0, 0x99, 0xc0, 0x3f, 0x5c, 0x0, 0x7f, 0xf0,
+    0xe7, 0xfc, 0x41, 0xff, 0x83, 0x66, 0x42, 0x13,
+    0x38, 0x11, 0x98, 0x60, 0xcd, 0x80, 0x3f, 0xfd,
+    0x4c, 0x8, 0x1, 0xf7, 0x5, 0xd4, 0xd9, 0x80,
+    0x4b, 0x44, 0xac, 0xe0,
+
+    /* U+75 "u" */
+    0x3f, 0x80, 0xd, 0x1e, 0x80, 0x1f, 0xfe, 0x81,
+    0x0, 0xf8, 0x40, 0x3f, 0x88, 0x1c, 0x3, 0x28,
+    0x4, 0xe3, 0x6c, 0xfa, 0x60, 0x14, 0x41, 0x66,
+    0xae, 0x0, 0x0,
+
+    /* U+76 "v" */
+    0xd, 0xf0, 0xe, 0x1f, 0xc0, 0xa0, 0x50, 0xc,
+    0xe1, 0x40, 0xc1, 0xc0, 0x1a, 0x81, 0x80, 0x55,
+    0x4, 0x0, 0x26, 0xc0, 0x17, 0x3, 0x0, 0x18,
+    0x28, 0x2, 0x42, 0xa0, 0x5, 0x11, 0x80, 0x6a,
+    0x22, 0xd4, 0x1, 0xcc, 0x15, 0x40, 0x60, 0xe,
+    0x14, 0x65, 0x50, 0x80, 0x7b, 0xc4, 0xb8, 0x3,
+    0xe4, 0x11, 0x20, 0x4,
+
+    /* U+77 "w" */
+    0x6f, 0x20, 0x5, 0x58, 0x5, 0xf0, 0xa0, 0xe0,
+    0x4, 0x40, 0x0, 0xc3, 0x4c, 0x34, 0x8, 0x40,
+    0xc1, 0x41, 0x0, 0x88, 0xe, 0x24, 0x81, 0xc2,
+    0x20, 0x47, 0xc, 0x57, 0xc0, 0x35, 0x0, 0x79,
+    0x2, 0x66, 0x14, 0x14, 0xc0, 0xa, 0x8, 0x48,
+    0x81, 0x31, 0xc0, 0x1, 0x87, 0x1, 0x90, 0xd0,
+    0x28, 0x4, 0x6a, 0x80, 0x4, 0x71, 0x10, 0x4,
+    0xa1, 0x80, 0xc, 0x15, 0x0, 0xde, 0x6, 0x0,
+    0x40, 0xc0, 0x0,
+
+    /* U+78 "x" */
+    0x7f, 0x90, 0xc, 0xff, 0x40, 0xe8, 0xca, 0x0,
+    0x38, 0x2a, 0x0, 0x50, 0xd8, 0x87, 0x7, 0x0,
+    0x43, 0x43, 0x52, 0x50, 0x60, 0x19, 0x1d, 0x19,
+    0x1c, 0x3, 0xd2, 0x0, 0xf0, 0xf, 0xac, 0x1,
+    0x20, 0x1e, 0x65, 0x54, 0x94, 0x80, 0x62, 0x91,
+    0xa6, 0x46, 0x40, 0xb, 0x83, 0x40, 0x14, 0x34,
+    0x21, 0x6, 0xe6, 0x0, 0x1b, 0x1a, 0x0,
+
+    /* U+79 "y" */
+    0x1f, 0xe0, 0xf, 0x77, 0x88, 0x94, 0x54, 0x3,
+    0x28, 0xa8, 0x84, 0x87, 0x0, 0x6e, 0x9, 0x0,
+    0x19, 0x90, 0x80, 0x2, 0x86, 0x60, 0xa, 0x42,
+    0xc0, 0xc, 0x12, 0x1, 0x94, 0x98, 0x1, 0x22,
+    0xa0, 0x1d, 0x60, 0xc8, 0x32, 0x1, 0xe6, 0x1b,
+    0xe0, 0x60, 0xf, 0x98, 0x95, 0x84, 0x3, 0xe9,
+    0x0, 0x58, 0x7, 0xe1, 0x12, 0x10, 0x7, 0xe7,
+    0x1f, 0x0, 0xfc, 0x50, 0x48, 0x1, 0xe3, 0xac,
+    0xe, 0x0, 0xf9, 0x54, 0x76, 0x60, 0x1e,
+
+    /* U+7A "z" */
+    0x5f, 0xff, 0xc6, 0xef, 0xe5, 0x0, 0x11, 0x22,
+    0x39, 0xc2, 0x84, 0x3, 0xa8, 0x9d, 0x40, 0x39,
+    0x94, 0xe0, 0x3, 0x8e, 0x47, 0x40, 0x38, 0x74,
+    0x34, 0x40, 0x3a, 0x86, 0x4c, 0x3, 0xa1, 0x15,
+    0x80, 0x39, 0x1c, 0x9, 0xdf, 0x90, 0x80, 0xf,
+    0x11, 0xda,
+
+    /* U+7B "{" */
+    0x0, 0xc9, 0x92, 0x1, 0x1d, 0xb5, 0x80, 0x50,
+    0x14, 0x40, 0x12, 0x20, 0x3, 0x8, 0x7, 0xe1,
+    0x0, 0xc6, 0x1, 0xe4, 0xd, 0x0, 0x13, 0x41,
+    0x30, 0x3, 0xe4, 0xf0, 0x40, 0x12, 0xc5, 0x40,
+    0x12, 0x4c, 0x22, 0x80, 0x64, 0xc, 0x0, 0xc4,
+    0x6, 0x1, 0xe1, 0x0, 0xc2, 0xe, 0x1, 0xc6,
+    0x60, 0xe, 0x80, 0x90, 0xc, 0x94, 0xd4, 0x1,
+    0x97, 0xec,
+
+    /* U+7C "|" */
+    0xbb, 0x0, 0x7f, 0xf6, 0x0,
+
+    /* U+7D "}" */
+    0xac, 0x30, 0xd, 0xf, 0x86, 0x1, 0x15, 0x4,
+    0x80, 0x61, 0x24, 0x0, 0xe1, 0x10, 0x7, 0xff,
+    0x1, 0xc0, 0x40, 0x31, 0x82, 0x80, 0x69, 0x1a,
+    0x52, 0x0, 0xe, 0x5, 0x48, 0x5, 0xc2, 0xfe,
+    0x0, 0x73, 0x98, 0x40, 0x6, 0x3, 0x80, 0x67,
+    0x1, 0x0, 0xff, 0x84, 0x40, 0x18, 0x49, 0x40,
+    0x35, 0x4, 0x0, 0x58, 0xb6, 0x60, 0x16, 0xf2,
+    0x0, 0x60,
+
+    /* U+7E "~" */
+    0x3, 0xdf, 0xd5, 0x0, 0xcc, 0x63, 0xa6, 0xa7,
+    0x52, 0x0, 0x29, 0x57, 0x1f, 0xae, 0x56, 0xea,
+    0xc1, 0x64, 0xa1, 0x0, 0x54, 0x9a, 0x96, 0x0
+};
+
+
+/*---------------------
+ *  GLYPH DESCRIPTION
+ *--------------------*/
+
+static const lv_font_fmt_txt_glyph_dsc_t glyph_dsc[] = {
+    {.bitmap_index = 0, .adv_w = 0, .box_w = 0, .box_h = 0, .ofs_x = 0, .ofs_y = 0} /* id = 0 reserved */,
+    {.bitmap_index = 0, .adv_w = 192, .box_w = 0, .box_h = 0, .ofs_x = 0, .ofs_y = 0},
+    {.bitmap_index = 0, .adv_w = 192, .box_w = 3, .box_h = 15, .ofs_x = 4, .ofs_y = 0},
+    {.bitmap_index = 13, .adv_w = 192, .box_w = 6, .box_h = 5, .ofs_x = 3, .ofs_y = 10},
+    {.bitmap_index = 26, .adv_w = 192, .box_w = 12, .box_h = 15, .ofs_x = 0, .ofs_y = 0},
+    {.bitmap_index = 110, .adv_w = 192, .box_w = 10, .box_h = 19, .ofs_x = 1, .ofs_y = -2},
+    {.bitmap_index = 193, .adv_w = 192, .box_w = 12, .box_h = 15, .ofs_x = 0, .ofs_y = 0},
+    {.bitmap_index = 269, .adv_w = 192, .box_w = 11, .box_h = 15, .ofs_x = 1, .ofs_y = 0},
+    {.bitmap_index = 346, .adv_w = 192, .box_w = 3, .box_h = 5, .ofs_x = 4, .ofs_y = 10},
+    {.bitmap_index = 353, .adv_w = 192, .box_w = 6, .box_h = 22, .ofs_x = 3, .ofs_y = -5},
+    {.bitmap_index = 413, .adv_w = 192, .box_w = 6, .box_h = 22, .ofs_x = 3, .ofs_y = -5},
+    {.bitmap_index = 472, .adv_w = 192, .box_w = 10, .box_h = 10, .ofs_x = 1, .ofs_y = 5},
+    {.bitmap_index = 518, .adv_w = 192, .box_w = 10, .box_h = 11, .ofs_x = 1, .ofs_y = 1},
+    {.bitmap_index = 543, .adv_w = 192, .box_w = 4, .box_h = 6, .ofs_x = 3, .ofs_y = -4},
+    {.bitmap_index = 555, .adv_w = 192, .box_w = 8, .box_h = 2, .ofs_x = 2, .ofs_y = 6},
+    {.bitmap_index = 561, .adv_w = 192, .box_w = 4, .box_h = 3, .ofs_x = 4, .ofs_y = 0},
+    {.bitmap_index = 567, .adv_w = 192, .box_w = 9, .box_h = 16, .ofs_x = 2, .ofs_y = -1},
+    {.bitmap_index = 617, .adv_w = 192, .box_w = 10, .box_h = 15, .ofs_x = 1, .ofs_y = 0},
+    {.bitmap_index = 689, .adv_w = 192, .box_w = 6, .box_h = 15, .ofs_x = 2, .ofs_y = 0},
+    {.bitmap_index = 708, .adv_w = 192, .box_w = 11, .box_h = 15, .ofs_x = 0, .ofs_y = 0},
+    {.bitmap_index = 774, .adv_w = 192, .box_w = 10, .box_h = 15, .ofs_x = 0, .ofs_y = 0},
+    {.bitmap_index = 841, .adv_w = 192, .box_w = 11, .box_h = 15, .ofs_x = 0, .ofs_y = 0},
+    {.bitmap_index = 893, .adv_w = 192, .box_w = 10, .box_h = 15, .ofs_x = 1, .ofs_y = 0},
+    {.bitmap_index = 957, .adv_w = 192, .box_w = 10, .box_h = 15, .ofs_x = 1, .ofs_y = 0},
+    {.bitmap_index = 1027, .adv_w = 192, .box_w = 10, .box_h = 15, .ofs_x = 1, .ofs_y = 0},
+    {.bitmap_index = 1078, .adv_w = 192, .box_w = 10, .box_h = 15, .ofs_x = 1, .ofs_y = 0},
+    {.bitmap_index = 1150, .adv_w = 192, .box_w = 10, .box_h = 15, .ofs_x = 1, .ofs_y = 0},
+    {.bitmap_index = 1220, .adv_w = 192, .box_w = 4, .box_h = 11, .ofs_x = 5, .ofs_y = 0},
+    {.bitmap_index = 1237, .adv_w = 192, .box_w = 5, .box_h = 15, .ofs_x = 4, .ofs_y = -4},
+    {.bitmap_index = 1265, .adv_w = 192, .box_w = 9, .box_h = 10, .ofs_x = 1, .ofs_y = 1},
+    {.bitmap_index = 1305, .adv_w = 192, .box_w = 10, .box_h = 6, .ofs_x = 1, .ofs_y = 4},
+    {.bitmap_index = 1322, .adv_w = 192, .box_w = 10, .box_h = 10, .ofs_x = 1, .ofs_y = 1},
+    {.bitmap_index = 1365, .adv_w = 192, .box_w = 10, .box_h = 15, .ofs_x = 1, .ofs_y = 0},
+    {.bitmap_index = 1424, .adv_w = 192, .box_w = 12, .box_h = 15, .ofs_x = 0, .ofs_y = 0},
+    {.bitmap_index = 1513, .adv_w = 192, .box_w = 12, .box_h = 15, .ofs_x = 0, .ofs_y = 0},
+    {.bitmap_index = 1585, .adv_w = 192, .box_w = 10, .box_h = 15, .ofs_x = 1, .ofs_y = 0},
+    {.bitmap_index = 1648, .adv_w = 192, .box_w = 10, .box_h = 15, .ofs_x = 1, .ofs_y = 0},
+    {.bitmap_index = 1707, .adv_w = 192, .box_w = 11, .box_h = 15, .ofs_x = 1, .ofs_y = 0},
+    {.bitmap_index = 1765, .adv_w = 192, .box_w = 10, .box_h = 15, .ofs_x = 1, .ofs_y = 0},
+    {.bitmap_index = 1798, .adv_w = 192, .box_w = 10, .box_h = 15, .ofs_x = 1, .ofs_y = 0},
+    {.bitmap_index = 1825, .adv_w = 192, .box_w = 11, .box_h = 15, .ofs_x = 0, .ofs_y = 0},
+    {.bitmap_index = 1895, .adv_w = 192, .box_w = 10, .box_h = 15, .ofs_x = 1, .ofs_y = 0},
+    {.bitmap_index = 1915, .adv_w = 192, .box_w = 10, .box_h = 15, .ofs_x = 1, .ofs_y = 0},
+    {.bitmap_index = 1941, .adv_w = 192, .box_w = 11, .box_h = 15, .ofs_x = 0, .ofs_y = 0},
+    {.bitmap_index = 1975, .adv_w = 192, .box_w = 11, .box_h = 15, .ofs_x = 1, .ofs_y = 0},
+    {.bitmap_index = 2035, .adv_w = 192, .box_w = 10, .box_h = 15, .ofs_x = 1, .ofs_y = 0},
+    {.bitmap_index = 2050, .adv_w = 192, .box_w = 10, .box_h = 15, .ofs_x = 1, .ofs_y = 0},
+    {.bitmap_index = 2101, .adv_w = 192, .box_w = 10, .box_h = 15, .ofs_x = 1, .ofs_y = 0},
+    {.bitmap_index = 2149, .adv_w = 192, .box_w = 10, .box_h = 15, .ofs_x = 1, .ofs_y = 0},
+    {.bitmap_index = 2216, .adv_w = 192, .box_w = 11, .box_h = 15, .ofs_x = 1, .ofs_y = 0},
+    {.bitmap_index = 2262, .adv_w = 192, .box_w = 12, .box_h = 18, .ofs_x = 0, .ofs_y = -3},
+    {.bitmap_index = 2351, .adv_w = 192, .box_w = 11, .box_h = 15, .ofs_x = 1, .ofs_y = 0},
+    {.bitmap_index = 2412, .adv_w = 192, .box_w = 11, .box_h = 15, .ofs_x = 1, .ofs_y = 0},
+    {.bitmap_index = 2487, .adv_w = 192, .box_w = 12, .box_h = 15, .ofs_x = 0, .ofs_y = 0},
+    {.bitmap_index = 2506, .adv_w = 192, .box_w = 10, .box_h = 15, .ofs_x = 1, .ofs_y = 0},
+    {.bitmap_index = 2545, .adv_w = 192, .box_w = 12, .box_h = 15, .ofs_x = 0, .ofs_y = 0},
+    {.bitmap_index = 2619, .adv_w = 192, .box_w = 12, .box_h = 15, .ofs_x = 0, .ofs_y = 0},
+    {.bitmap_index = 2711, .adv_w = 192, .box_w = 12, .box_h = 15, .ofs_x = 0, .ofs_y = 0},
+    {.bitmap_index = 2789, .adv_w = 192, .box_w = 12, .box_h = 15, .ofs_x = 0, .ofs_y = 0},
+    {.bitmap_index = 2845, .adv_w = 192, .box_w = 10, .box_h = 15, .ofs_x = 1, .ofs_y = 0},
+    {.bitmap_index = 2899, .adv_w = 192, .box_w = 5, .box_h = 20, .ofs_x = 4, .ofs_y = -3},
+    {.bitmap_index = 2915, .adv_w = 192, .box_w = 8, .box_h = 16, .ofs_x = 2, .ofs_y = -1},
+    {.bitmap_index = 2963, .adv_w = 192, .box_w = 5, .box_h = 20, .ofs_x = 3, .ofs_y = -3},
+    {.bitmap_index = 2979, .adv_w = 192, .box_w = 8, .box_h = 8, .ofs_x = 2, .ofs_y = 7},
+    {.bitmap_index = 3010, .adv_w = 192, .box_w = 10, .box_h = 2, .ofs_x = 1, .ofs_y = -1},
+    {.bitmap_index = 3016, .adv_w = 192, .box_w = 4, .box_h = 3, .ofs_x = 4, .ofs_y = 12},
+    {.bitmap_index = 3022, .adv_w = 192, .box_w = 10, .box_h = 11, .ofs_x = 1, .ofs_y = 0},
+    {.bitmap_index = 3074, .adv_w = 192, .box_w = 10, .box_h = 15, .ofs_x = 1, .ofs_y = 0},
+    {.bitmap_index = 3125, .adv_w = 192, .box_w = 10, .box_h = 11, .ofs_x = 1, .ofs_y = 0},
+    {.bitmap_index = 3176, .adv_w = 192, .box_w = 10, .box_h = 15, .ofs_x = 1, .ofs_y = 0},
+    {.bitmap_index = 3230, .adv_w = 192, .box_w = 10, .box_h = 11, .ofs_x = 1, .ofs_y = 0},
+    {.bitmap_index = 3280, .adv_w = 192, .box_w = 11, .box_h = 16, .ofs_x = 1, .ofs_y = 0},
+    {.bitmap_index = 3325, .adv_w = 192, .box_w = 10, .box_h = 15, .ofs_x = 1, .ofs_y = -4},
+    {.bitmap_index = 3392, .adv_w = 192, .box_w = 10, .box_h = 15, .ofs_x = 1, .ofs_y = 0},
+    {.bitmap_index = 3424, .adv_w = 192, .box_w = 10, .box_h = 15, .ofs_x = 1, .ofs_y = 0},
+    {.bitmap_index = 3459, .adv_w = 192, .box_w = 7, .box_h = 19, .ofs_x = 2, .ofs_y = -4},
+    {.bitmap_index = 3493, .adv_w = 192, .box_w = 11, .box_h = 15, .ofs_x = 1, .ofs_y = 0},
+    {.bitmap_index = 3541, .adv_w = 192, .box_w = 10, .box_h = 15, .ofs_x = 1, .ofs_y = 0},
+    {.bitmap_index = 3566, .adv_w = 192, .box_w = 12, .box_h = 11, .ofs_x = 0, .ofs_y = 0},
+    {.bitmap_index = 3595, .adv_w = 192, .box_w = 10, .box_h = 11, .ofs_x = 1, .ofs_y = 0},
+    {.bitmap_index = 3623, .adv_w = 192, .box_w = 10, .box_h = 11, .ofs_x = 1, .ofs_y = 0},
+    {.bitmap_index = 3677, .adv_w = 192, .box_w = 10, .box_h = 15, .ofs_x = 1, .ofs_y = -4},
+    {.bitmap_index = 3733, .adv_w = 192, .box_w = 10, .box_h = 15, .ofs_x = 1, .ofs_y = -4},
+    {.bitmap_index = 3786, .adv_w = 192, .box_w = 8, .box_h = 11, .ofs_x = 3, .ofs_y = 0},
+    {.bitmap_index = 3806, .adv_w = 192, .box_w = 10, .box_h = 11, .ofs_x = 1, .ofs_y = 0},
+    {.bitmap_index = 3861, .adv_w = 192, .box_w = 10, .box_h = 14, .ofs_x = 1, .ofs_y = 0},
+    {.bitmap_index = 3897, .adv_w = 192, .box_w = 10, .box_h = 11, .ofs_x = 1, .ofs_y = 0},
+    {.bitmap_index = 3924, .adv_w = 192, .box_w = 11, .box_h = 11, .ofs_x = 0, .ofs_y = 0},
+    {.bitmap_index = 3976, .adv_w = 192, .box_w = 12, .box_h = 11, .ofs_x = 0, .ofs_y = 0},
+    {.bitmap_index = 4043, .adv_w = 192, .box_w = 11, .box_h = 11, .ofs_x = 1, .ofs_y = 0},
+    {.bitmap_index = 4098, .adv_w = 192, .box_w = 12, .box_h = 15, .ofs_x = 0, .ofs_y = -4},
+    {.bitmap_index = 4169, .adv_w = 192, .box_w = 10, .box_h = 11, .ofs_x = 1, .ofs_y = 0},
+    {.bitmap_index = 4211, .adv_w = 192, .box_w = 7, .box_h = 20, .ofs_x = 3, .ofs_y = -4},
+    {.bitmap_index = 4269, .adv_w = 192, .box_w = 2, .box_h = 19, .ofs_x = 5, .ofs_y = -4},
+    {.bitmap_index = 4274, .adv_w = 192, .box_w = 7, .box_h = 20, .ofs_x = 3, .ofs_y = -4},
+    {.bitmap_index = 4332, .adv_w = 192, .box_w = 12, .box_h = 4, .ofs_x = 0, .ofs_y = 4}
+};
+
+/*---------------------
+ *  CHARACTER MAPPING
+ *--------------------*/
+
+
+
+/*Collect the unicode lists and glyph_id offsets*/
+static const lv_font_fmt_txt_cmap_t cmaps[] =
+{
+    {
+        .range_start = 32, .range_length = 95, .glyph_id_start = 1,
+        .unicode_list = NULL, .glyph_id_ofs_list = NULL, .list_length = 0, .type = LV_FONT_FMT_TXT_CMAP_FORMAT0_TINY
+    }
+};
+
+
+
+/*--------------------
+ *  ALL CUSTOM DATA
+ *--------------------*/
+
+/*Store all the custom data of the font*/
+static lv_font_fmt_txt_dsc_t font_dsc = {
+    .glyph_bitmap = gylph_bitmap,
+    .glyph_dsc = glyph_dsc,
+    .cmaps = cmaps,
+    .kern_dsc = NULL,
+    .kern_scale = 0,
+    .cmap_num = 1,
+    .bpp = 4,
+    .kern_classes = 0,
+    .bitmap_format = 1
+};
+
+
+/*-----------------
+ *  PUBLIC FONT
+ *----------------*/
+
+/*Initialize a public general font descriptor*/
+lv_font_t font_3 = {
+    .get_glyph_dsc = lv_font_get_glyph_dsc_fmt_txt,    /*Function pointer to get glyph's data*/
+    .get_glyph_bitmap = lv_font_get_bitmap_fmt_txt,    /*Function pointer to get glyph's bitmap*/
+    .line_height = 22,          /*The maximum line height required by the font*/
+    .base_line = 5,             /*Baseline measured from the bottom of the line*/
+#if !(LVGL_VERSION_MAJOR == 6 && LVGL_VERSION_MINOR == 0)
+    .subpx = LV_FONT_SUBPX_NONE,
+#endif
+    .dsc = &font_dsc           /*The custom font data. Will be accessed by `get_glyph_bitmap/dsc` */
+};
+
+#endif /*#if FONT_3*/
+

tests/lv_test_main.c

@@ -23,6 +23,63 @@ int main(void)
 }
 
 
+#if LV_USE_FILESYSTEM
+static lv_fs_res_t open_cb(struct _lv_fs_drv_t * drv, void * file_p, const char * path, lv_fs_mode_t mode)
+{
+    (void) drv;
+    (void) mode;
+
+    FILE * fp = fopen(path, "rb"); // only reading is supported
+
+    *((FILE **)file_p) = fp;
+    return NULL == fp ? LV_FS_RES_UNKNOWN : LV_FS_RES_OK;
+}
+
+static lv_fs_res_t close_cb(struct _lv_fs_drv_t * drv, void * file_p)
+{
+    (void) drv;
+
+    FILE * fp = *((FILE **) file_p);
+    fclose(fp);
+    return LV_FS_RES_OK;
+}
+
+static lv_fs_res_t read_cb(struct _lv_fs_drv_t * drv, void * file_p, void * buf, uint32_t btr, uint32_t * br)
+{
+    (void) drv;
+
+    FILE * fp = *((FILE **) file_p);
+    *br = fread(buf, 1, btr, fp);
+    return (*br <= 0) ? LV_FS_RES_UNKNOWN : LV_FS_RES_OK;
+}
+
+static lv_fs_res_t seek_cb(struct _lv_fs_drv_t * drv, void * file_p, uint32_t pos)
+{
+    (void) drv;
+
+    FILE * fp = *((FILE **) file_p);
+    fseek (fp, pos, SEEK_SET);
+
+    return LV_FS_RES_OK;
+}
+
+static lv_fs_res_t tell_cb(struct _lv_fs_drv_t * drv, void * file_p, uint32_t * pos_p)
+{
+    (void) drv;
+
+    FILE * fp = *((FILE **) file_p);
+    *pos_p = ftell(fp);
+
+    return LV_FS_RES_OK;
+}
+
+static bool ready_cb(struct _lv_fs_drv_t * drv)
+{
+    (void) drv;
+    return true;
+}
+#endif
+
 static void hal_init(void)
 {
     static lv_disp_buf_t disp_buf;
@@ -35,8 +92,23 @@ static void hal_init(void)
     disp_drv.buffer = &disp_buf;
     disp_drv.flush_cb = dummy_flush_cb;
     lv_disp_drv_register(&disp_drv);
-}
 
+#if LV_USE_FILESYSTEM
+    lv_fs_drv_t drv;
+    lv_fs_drv_init(&drv);                     /*Basic initialization*/
+
+    drv.letter = 'f';                         /*An uppercase letter to identify the drive */
+    drv.file_size = sizeof(FILE *);   /*Size required to store a file object*/
+    drv.ready_cb = ready_cb;               /*Callback to tell if the drive is ready to use */
+    drv.open_cb = open_cb;                 /*Callback to open a file */
+    drv.close_cb = close_cb;               /*Callback to close a file */
+    drv.read_cb = read_cb;                 /*Callback to read a file */
+    drv.seek_cb = seek_cb;                 /*Callback to seek in a file (Move cursor) */
+    drv.tell_cb = tell_cb;                 /*Callback to tell the cursor position  */
+
+    lv_fs_drv_register(&drv);                 /*Finally register the drive*/
+#endif
+}
 
 static void dummy_flush_cb(lv_disp_drv_t * disp_drv, const lv_area_t * area, lv_color_t * color_p)
 {