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lvgl/src/lv_widgets/lv_img.c
Gabor Kiss-Vamosi 2f44d9045b run formatter
2020-03-03 15:37:13 +01:00

770 lines
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/**
* @file lv_img.c
*
*/
/*********************
* INCLUDES
*********************/
#include "lv_img.h"
#if LV_USE_IMG != 0
/*Testing of dependencies*/
#if LV_USE_LABEL == 0
#error "lv_img: lv_label is required. Enable it in lv_conf.h (LV_USE_LABEL 1) "
#endif
#include "../lv_core/lv_debug.h"
#include "../lv_themes/lv_theme.h"
#include "../lv_draw/lv_img_decoder.h"
#include "../lv_misc/lv_fs.h"
#include "../lv_misc/lv_txt.h"
#include "../lv_misc/lv_math.h"
#include "../lv_misc/lv_log.h"
/*********************
* DEFINES
*********************/
#define LV_OBJX_NAME "lv_img"
/**********************
* TYPEDEFS
**********************/
/**********************
* STATIC PROTOTYPES
**********************/
static lv_design_res_t lv_img_design(lv_obj_t * img, const lv_area_t * clip_area, lv_design_mode_t mode);
static lv_res_t lv_img_signal(lv_obj_t * img, lv_signal_t sign, void * param);
static lv_style_list_t * lv_img_get_style(lv_obj_t * img, uint8_t type);
/**********************
* STATIC VARIABLES
**********************/
static lv_signal_cb_t ancestor_signal;
/**********************
* MACROS
**********************/
/**********************
* GLOBAL FUNCTIONS
**********************/
/**
* Create an image objects
* @param par pointer to an object, it will be the parent of the new button
* @param copy pointer to a image object, if not NULL then the new object will be copied from it
* @return pointer to the created image
*/
lv_obj_t * lv_img_create(lv_obj_t * par, const lv_obj_t * copy)
{
LV_LOG_TRACE("image create started");
/*Create a basic object*/
lv_obj_t * img = lv_obj_create(par, copy);
LV_ASSERT_MEM(img);
if(img == NULL) return NULL;
if(ancestor_signal == NULL) ancestor_signal = lv_obj_get_signal_cb(img);
/*Extend the basic object to image object*/
lv_img_ext_t * ext = lv_obj_allocate_ext_attr(img, sizeof(lv_img_ext_t));
LV_ASSERT_MEM(ext);
if(ext == NULL) {
lv_obj_del(img);
return NULL;
}
ext->src = NULL;
ext->src_type = LV_IMG_SRC_UNKNOWN;
ext->cf = LV_IMG_CF_UNKNOWN;
ext->w = lv_obj_get_width(img);
ext->h = lv_obj_get_height(img);
ext->angle = 0;
ext->zoom = LV_IMG_ZOOM_NONE;
ext->antialias = LV_ANTIALIAS ? 1 : 0;
ext->auto_size = 1;
ext->offset.x = 0;
ext->offset.y = 0;
ext->pivot.x = 0;
ext->pivot.y = 0;
/*Init the new object*/
lv_obj_set_signal_cb(img, lv_img_signal);
lv_obj_set_design_cb(img, lv_img_design);
if(copy == NULL) {
lv_theme_apply(img, LV_THEME_IMAGE);
lv_obj_set_click(img, false);
lv_obj_set_adv_hittest(img, true); /*Images have fast hit-testing*/
/* Enable auto size for non screens
* because image screens are wallpapers
* and must be screen sized*/
if(par != NULL) {
ext->auto_size = 1;
}
else {
ext->auto_size = 0;
}
}
else {
lv_img_ext_t * copy_ext = lv_obj_get_ext_attr(copy);
ext->auto_size = copy_ext->auto_size;
ext->zoom = copy_ext->zoom;
ext->angle = copy_ext->angle;
ext->antialias = copy_ext->antialias;
ext->offset.x = copy_ext->offset.x;
ext->offset.y = copy_ext->offset.y;
ext->pivot.x = copy_ext->pivot.x;
ext->pivot.y = copy_ext->pivot.y;
lv_img_set_src(img, copy_ext->src);
/*Refresh the style with new signal function*/
lv_obj_refresh_style(img);
}
LV_LOG_INFO("image created");
return img;
}
/*=====================
* Setter functions
*====================*/
/**
* Set the pixel map to display by the image
* @param img pointer to an image object
* @param data the image data
*/
void lv_img_set_src(lv_obj_t * img, const void * src_img)
{
LV_ASSERT_OBJ(img, LV_OBJX_NAME);
lv_img_src_t src_type = lv_img_src_get_type(src_img);
lv_img_ext_t * ext = lv_obj_get_ext_attr(img);
#if LV_USE_LOG && LV_LOG_LEVEL >= LV_LOG_LEVEL_INFO
switch(src_type) {
case LV_IMG_SRC_FILE:
LV_LOG_TRACE("lv_img_set_src: `LV_IMG_SRC_FILE` type found");
break;
case LV_IMG_SRC_VARIABLE:
LV_LOG_TRACE("lv_img_set_src: `LV_IMG_SRC_VARIABLE` type found");
break;
case LV_IMG_SRC_SYMBOL:
LV_LOG_TRACE("lv_img_set_src: `LV_IMG_SRC_SYMBOL` type found");
break;
default:
LV_LOG_WARN("lv_img_set_src: unknown type");
}
#endif
/*If the new source type is unknown free the memories of the old source*/
if(src_type == LV_IMG_SRC_UNKNOWN) {
LV_LOG_WARN("lv_img_set_src: unknown image type");
if(ext->src_type == LV_IMG_SRC_SYMBOL || ext->src_type == LV_IMG_SRC_FILE) {
lv_mem_free(ext->src);
}
ext->src = NULL;
ext->src_type = LV_IMG_SRC_UNKNOWN;
return;
}
lv_img_header_t header;
lv_img_decoder_get_info(src_img, &header);
/*Save the source*/
if(src_type == LV_IMG_SRC_VARIABLE) {
LV_LOG_INFO("lv_img_set_src: `LV_IMG_SRC_VARIABLE` type found");
/*If memory was allocated because of the previous `src_type` then free it*/
if(ext->src_type == LV_IMG_SRC_FILE || ext->src_type == LV_IMG_SRC_SYMBOL) {
lv_mem_free(ext->src);
}
ext->src = src_img;
}
else if(src_type == LV_IMG_SRC_FILE || src_type == LV_IMG_SRC_SYMBOL) {
/* If the new and the old src are the same then it was only a refresh.*/
if(ext->src != src_img) {
const void * old_src = NULL;
/* If memory was allocated because of the previous `src_type` then save its pointer and free after allocation.
* It's important to allocate first to be sure the new data will be on a new address.
* Else `img_cache` wouldn't see the change in source.*/
if(ext->src_type == LV_IMG_SRC_FILE || ext->src_type == LV_IMG_SRC_SYMBOL) {
old_src = ext->src;
}
char * new_str = lv_mem_alloc(strlen(src_img) + 1);
LV_ASSERT_MEM(new_str);
if(new_str == NULL) return;
strcpy(new_str, src_img);
ext->src = new_str;
if(old_src) lv_mem_free(old_src);
}
}
if(src_type == LV_IMG_SRC_SYMBOL) {
/*`lv_img_dsc_get_info` couldn't set the with and height of a font so set it here*/
const lv_font_t * font = lv_obj_get_style_text_font(img, LV_IMG_PART_MAIN);
lv_style_int_t letter_space = lv_obj_get_style_text_letter_space(img, LV_IMG_PART_MAIN);
lv_style_int_t line_space = lv_obj_get_style_text_line_space(img, LV_IMG_PART_MAIN);
lv_point_t size;
lv_txt_get_size(&size, src_img, font, letter_space, line_space,
LV_COORD_MAX, LV_TXT_FLAG_NONE);
header.w = size.x;
header.h = size.y;
}
ext->src_type = src_type;
ext->w = header.w;
ext->h = header.h;
ext->cf = header.cf;
ext->pivot.x = header.w / 2;
ext->pivot.y = header.h / 2;
if(lv_img_get_auto_size(img) != false) {
lv_obj_set_size(img, ext->w, ext->h);
}
/*Provide enough room for the rotated corners*/
if(ext->angle || ext->zoom != LV_IMG_ZOOM_NONE) lv_obj_refresh_ext_draw_pad(img);
lv_obj_invalidate(img);
}
/**
* Enable the auto size feature.
* If enabled the object size will be same as the picture size.
* @param img pointer to an image
* @param en true: auto size enable, false: auto size disable
*/
void lv_img_set_auto_size(lv_obj_t * img, bool en)
{
LV_ASSERT_OBJ(img, LV_OBJX_NAME);
lv_img_ext_t * ext = lv_obj_get_ext_attr(img);
ext->auto_size = (en == false ? 0 : 1);
}
/**
* Set an offset for the source of an image.
* so the image will be displayed from the new origin.
* @param img pointer to an image
* @param x: the new offset along x axis.
*/
void lv_img_set_offset_x(lv_obj_t * img, lv_coord_t x)
{
LV_ASSERT_OBJ(img, LV_OBJX_NAME);
lv_img_ext_t * ext = lv_obj_get_ext_attr(img);
x = x % ext->w;
ext->offset.x = x;
lv_obj_invalidate(img);
}
/**
* Set an offset for the source of an image.
* so the image will be displayed from the new origin.
* @param img pointer to an image
* @param y: the new offset along y axis.
*/
void lv_img_set_offset_y(lv_obj_t * img, lv_coord_t y)
{
LV_ASSERT_OBJ(img, LV_OBJX_NAME);
lv_img_ext_t * ext = lv_obj_get_ext_attr(img);
y = y % ext->h;
ext->offset.y = y;
lv_obj_invalidate(img);
}
/**
* Set the rotation center of the image.
* The image will be rotated around this point
* @param img pointer to an image object
* @param pivot_x rotation center x of the image
* @param pivot_y rotation center y of the image
*/
void lv_img_set_pivot(lv_obj_t * img, lv_coord_t pivot_x, lv_coord_t pivot_y)
{
lv_img_ext_t * ext = lv_obj_get_ext_attr(img);
if(ext->pivot.x == pivot_x && ext->pivot.y == pivot_y) return;
lv_area_t a;
lv_img_buf_get_transformed_area(&a, ext->w, ext->h, ext->angle, ext->zoom, &ext->pivot);
a.x1 += img->coords.x1;
a.y1 += img->coords.y1;
a.x2 += img->coords.x1;
a.y2 += img->coords.y1;
lv_obj_invalidate_area(img, &a);
ext->pivot.x = pivot_x;
ext->pivot.y = pivot_y;
lv_obj_refresh_ext_draw_pad(img);
lv_img_buf_get_transformed_area(&a, ext->w, ext->h, ext->angle, ext->zoom, &ext->pivot);
a.x1 += img->coords.x1;
a.y1 += img->coords.y1;
a.x2 += img->coords.x1;
a.y2 += img->coords.y1;
lv_obj_invalidate_area(img, &a);
}
/**
* Set the rotation angle of the image.
* The image will be rotated around the set pivot set by `lv_img_set_pivot()`
* @param img pointer to an image object
* @param angle rotation angle in degree with 0.1 degree resolution (0..3600: clock wise)
*/
void lv_img_set_angle(lv_obj_t * img, int16_t angle)
{
if(angle < 0 || angle >= 3600) angle = angle % 3600;
lv_img_ext_t * ext = lv_obj_get_ext_attr(img);
if(angle == ext->angle) return;
lv_area_t a;
lv_img_buf_get_transformed_area(&a, ext->w, ext->h, ext->angle, ext->zoom, &ext->pivot);
a.x1 += img->coords.x1;
a.y1 += img->coords.y1;
a.x2 += img->coords.x1;
a.y2 += img->coords.y1;
lv_obj_invalidate_area(img, &a);
ext->angle = angle;
lv_obj_refresh_ext_draw_pad(img);
lv_img_buf_get_transformed_area(&a, ext->w, ext->h, ext->angle, ext->zoom, &ext->pivot);
a.x1 += img->coords.x1;
a.y1 += img->coords.y1;
a.x2 += img->coords.x1;
a.y2 += img->coords.y1;
lv_obj_invalidate_area(img, &a);
}
/**
* Set the zoom factor of the image.
* @param img pointer to an image object
* @param zoom the zoom factor.
* - 256 or LV_ZOOM_IMG_NONE for no zoom
* - <256: scale down
* - >256 scale up
* - 128 half size
* - 512 double size
*/
void lv_img_set_zoom(lv_obj_t * img, uint16_t zoom)
{
lv_img_ext_t * ext = lv_obj_get_ext_attr(img);
if(zoom == ext->zoom) return;
if(zoom == 0) zoom = 1;
lv_area_t a;
lv_img_buf_get_transformed_area(&a, ext->w, ext->h, ext->angle, ext->zoom, &ext->pivot);
a.x1 += img->coords.x1;
a.y1 += img->coords.y1;
a.x2 += img->coords.x1;
a.y2 += img->coords.y1;
lv_obj_invalidate_area(img, &a);
ext->zoom = zoom;
lv_obj_refresh_ext_draw_pad(img);
lv_img_buf_get_transformed_area(&a, ext->w, ext->h, ext->angle, ext->zoom, &ext->pivot);
a.x1 += img->coords.x1;
a.y1 += img->coords.y1;
a.x2 += img->coords.x1;
a.y2 += img->coords.y1;
lv_obj_invalidate_area(img, &a);
}
/**
* Enable/disable anti-aliasing for the transformations (rotate, zoom) or not
* @param img pointer to an image object
* @param antialias true: anti-aliased; false: not anti-aliased
*/
void lv_img_set_antialias(lv_obj_t * img, bool antialias)
{
lv_img_ext_t * ext = lv_obj_get_ext_attr(img);
if(antialias == ext->antialias) return;
ext->antialias = antialias;
lv_obj_invalidate(img);
}
/*=====================
* Getter functions
*====================*/
/**
* Get the source of the image
* @param img pointer to an image object
* @return the image source (symbol, file name or C array)
*/
const void * lv_img_get_src(lv_obj_t * img)
{
LV_ASSERT_OBJ(img, LV_OBJX_NAME);
lv_img_ext_t * ext = lv_obj_get_ext_attr(img);
return ext->src;
}
/**
* Get the name of the file set for an image
* @param img pointer to an image
* @return file name
*/
const char * lv_img_get_file_name(const lv_obj_t * img)
{
LV_ASSERT_OBJ(img, LV_OBJX_NAME);
lv_img_ext_t * ext = lv_obj_get_ext_attr(img);
if(ext->src_type == LV_IMG_SRC_FILE)
return ext->src;
else
return "";
}
/**
* Get the auto size enable attribute
* @param img pointer to an image
* @return true: auto size is enabled, false: auto size is disabled
*/
bool lv_img_get_auto_size(const lv_obj_t * img)
{
LV_ASSERT_OBJ(img, LV_OBJX_NAME);
lv_img_ext_t * ext = lv_obj_get_ext_attr(img);
return ext->auto_size == 0 ? false : true;
}
/**
* Get the offset.x attribute of the img object.
* @param img pointer to an image
* @return offset.x value.
*/
lv_coord_t lv_img_get_offset_x(lv_obj_t * img)
{
LV_ASSERT_OBJ(img, LV_OBJX_NAME);
lv_img_ext_t * ext = lv_obj_get_ext_attr(img);
return ext->offset.x;
}
/**
* Get the offset.y attribute of the img object.
* @param img pointer to an image
* @return offset.y value.
*/
lv_coord_t lv_img_get_offset_y(lv_obj_t * img)
{
LV_ASSERT_OBJ(img, LV_OBJX_NAME);
lv_img_ext_t * ext = lv_obj_get_ext_attr(img);
return ext->offset.y;
}
/**
* Get the rotation center of the image.
* @param img pointer to an image object
* @param center rotation center of the image
*/
void lv_img_get_pivot(lv_obj_t * img, lv_point_t * pivot)
{
LV_ASSERT_OBJ(img, LV_OBJX_NAME);
lv_img_ext_t * ext = lv_obj_get_ext_attr(img);
*pivot = ext->pivot;
}
/**
* Get the rotation angle of the image.
* @param img pointer to an image object
* @return rotation angle in degree (0..359)
*/
uint16_t lv_img_get_angle(lv_obj_t * img)
{
LV_ASSERT_OBJ(img, LV_OBJX_NAME);
lv_img_ext_t * ext = lv_obj_get_ext_attr(img);
return ext->angle;
}
/**
* Get the zoom factor of the image.
* @param img pointer to an image object
* @return zoom factor (256: no zoom)
*/
uint16_t lv_img_get_zoom(lv_obj_t * img)
{
LV_ASSERT_OBJ(img, LV_OBJX_NAME);
lv_img_ext_t * ext = lv_obj_get_ext_attr(img);
return ext->zoom;
}
/**
* Get whether the transformations (rotate, zoom) are anti-aliased or not
* @param img pointer to an image object
* @return true: anti-aliased; false: not anti-aliased
*/
bool lv_img_get_antialias(lv_obj_t * img)
{
LV_ASSERT_OBJ(img, LV_OBJX_NAME);
lv_img_ext_t * ext = lv_obj_get_ext_attr(img);
return ext->antialias ? true : false;
}
/**********************
* STATIC FUNCTIONS
**********************/
/**
* Handle the drawing related tasks of the images
* @param img pointer to an object
* @param clip_area the object will be drawn only in this area
* @param mode LV_DESIGN_COVER_CHK: only check if the object fully covers the 'mask_p' area
* (return 'true' if yes)
* LV_DESIGN_DRAW: draw the object (always return 'true')
* LV_DESIGN_DRAW_POST: drawing after every children are drawn
* @param return an element of `lv_design_res_t`
*/
static lv_design_res_t lv_img_design(lv_obj_t * img, const lv_area_t * clip_area, lv_design_mode_t mode)
{
lv_img_ext_t * ext = lv_obj_get_ext_attr(img);
if(mode == LV_DESIGN_COVER_CHK) {
lv_design_res_t cover = LV_DESIGN_RES_NOT_COVER;
if(ext->src_type == LV_IMG_SRC_UNKNOWN || ext->src_type == LV_IMG_SRC_SYMBOL ||
ext->angle != 0) return LV_DESIGN_RES_NOT_COVER;
if(ext->cf == LV_IMG_CF_TRUE_COLOR || ext->cf == LV_IMG_CF_RAW) {
cover = lv_area_is_in(clip_area, &img->coords, 0) ? LV_DESIGN_RES_COVER : LV_DESIGN_RES_NOT_COVER;
}
if(lv_obj_get_style_image_opa(img, LV_IMG_PART_MAIN) < LV_OPA_MAX) return false;
return cover;
}
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);
lv_obj_init_draw_rect_dsc(img, LV_IMG_PART_MAIN, &bg_dsc);
/*If the border is drawn later disable loading its properties*/
if(lv_obj_get_style_border_post(img, 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(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(&bg_coords, clip_area, &bg_dsc);
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));
lv_coord_t r = lv_obj_get_style_radius(img, 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, img + 8);
}
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;
lv_draw_img_dsc_init(&img_dsc);
lv_obj_init_draw_img_dsc(img, LV_IMG_PART_MAIN, &img_dsc);
img_dsc.angle = ext->angle;
img_dsc.zoom = ext->zoom;
img_dsc.pivot.x = ext->pivot.x;
img_dsc.pivot.y = ext->pivot.y;
img_dsc.antialias = ext->antialias;
lv_area_t cords_tmp;
cords_tmp.y1 = img_coords.y1;
cords_tmp.y2 = img_coords.y1 + ext->h - 1;
for(; cords_tmp.y1 <= img_coords.y2; cords_tmp.y1 += ext->h, cords_tmp.y2 += ext->h) {
cords_tmp.x1 = img_coords.x1;
cords_tmp.x2 = img_coords.x1 + ext->w - 1;
for(; cords_tmp.x1 <= img_coords.x2; cords_tmp.x1 += ext->w, cords_tmp.x2 += ext->w) {
lv_draw_img(&cords_tmp, clip_area, ext->src, &img_dsc);
}
}
}
else if(ext->src_type == LV_IMG_SRC_SYMBOL) {
LV_LOG_TRACE("lv_img_design: start to draw symbol");
lv_draw_label_dsc_t label_dsc;
lv_draw_label_dsc_init(&label_dsc);
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);
}
else {
/*Trigger the error handler of image drawer*/
LV_LOG_WARN("lv_img_design: image source type is unknown");
lv_draw_img(&img->coords, clip_area, NULL, NULL);
}
}
else if(mode == LV_DESIGN_DRAW_POST) {
if(lv_obj_get_style_clip_corner(img, LV_OBJ_PART_MAIN)) {
lv_draw_mask_radius_param_t * param = lv_draw_mask_remove_custom(img + 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(img, 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(img, LV_OBJ_PART_MAIN, &draw_dsc);
lv_draw_rect(&img->coords, clip_area, &draw_dsc);
}
}
return true;
}
/**
* Signal function of the image
* @param img pointer to an image object
* @param sign a signal type from lv_signal_t enum
* @param param pointer to a signal specific variable
* @return LV_RES_OK: the object is not deleted in the function; LV_RES_INV: the object is deleted
*/
static lv_res_t lv_img_signal(lv_obj_t * img, lv_signal_t sign, void * param)
{
lv_res_t res;
if(sign == LV_SIGNAL_GET_STYLE) {
lv_get_style_info_t * info = param;
info->result = lv_img_get_style(img, info->part);
if(info->result != NULL) return LV_RES_OK;
else return ancestor_signal(img, sign, param);
}
/* Include the ancient signal function */
res = ancestor_signal(img, sign, param);
if(res != LV_RES_OK) return res;
if(sign == LV_SIGNAL_GET_TYPE) return lv_obj_handle_get_type_signal(param, LV_OBJX_NAME);
lv_img_ext_t * ext = lv_obj_get_ext_attr(img);
if(sign == LV_SIGNAL_CLEANUP) {
if(ext->src_type == LV_IMG_SRC_FILE || ext->src_type == LV_IMG_SRC_SYMBOL) {
lv_mem_free(ext->src);
ext->src = NULL;
ext->src_type = LV_IMG_SRC_UNKNOWN;
}
}
else if(sign == LV_SIGNAL_STYLE_CHG) {
/*Refresh the file name to refresh the symbol text size*/
if(ext->src_type == LV_IMG_SRC_SYMBOL) {
lv_img_set_src(img, ext->src);
}
}
else if(sign == LV_SIGNAL_REFR_EXT_DRAW_PAD) {
/*If the image has angle provide enough room for the rotated corners */
if(ext->angle || ext->zoom != LV_IMG_ZOOM_NONE) {
lv_area_t a;
lv_img_buf_get_transformed_area(&a, ext->w, ext->h, ext->angle, ext->zoom, &ext->pivot);
img->ext_draw_pad = LV_MATH_MAX(img->ext_draw_pad, - a.x1);
img->ext_draw_pad = LV_MATH_MAX(img->ext_draw_pad, - a.y1);
img->ext_draw_pad = LV_MATH_MAX(img->ext_draw_pad, a.x2 - ext->w);
img->ext_draw_pad = LV_MATH_MAX(img->ext_draw_pad, a.y2 - ext->h);
}
/*Handle the padding of the background*/
lv_style_int_t left = lv_obj_get_style_pad_left(img, LV_IMG_PART_MAIN);
lv_style_int_t right = lv_obj_get_style_pad_right(img, LV_IMG_PART_MAIN);
lv_style_int_t top = lv_obj_get_style_pad_top(img, LV_IMG_PART_MAIN);
lv_style_int_t bottom = lv_obj_get_style_pad_bottom(img, LV_IMG_PART_MAIN);
img->ext_draw_pad = LV_MATH_MAX(img->ext_draw_pad, left);
img->ext_draw_pad = LV_MATH_MAX(img->ext_draw_pad, right);
img->ext_draw_pad = LV_MATH_MAX(img->ext_draw_pad, top);
img->ext_draw_pad = LV_MATH_MAX(img->ext_draw_pad, bottom);
}
else if(sign == LV_SIGNAL_HIT_TEST) {
lv_hit_test_info_t * info = param;
if(ext->zoom != 256 && ext->angle == 0) {
lv_coord_t origin_width = lv_area_get_width(&img->coords);
lv_coord_t origin_height = lv_area_get_height(&img->coords);
lv_coord_t scaled_width = (origin_width * ext->zoom + 255) / 256;
lv_coord_t scaled_height = (origin_height * ext->zoom + 255) / 256;
lv_coord_t width_offset = (origin_width - scaled_width) / 2;
lv_coord_t height_offset = (origin_height - scaled_height) / 2;
lv_area_t coords;
lv_area_copy(&coords, &img->coords);
coords.x1 += width_offset;
coords.x2 -= width_offset;
coords.y1 += height_offset;
coords.y2 -= height_offset;
info->result = lv_area_is_point_on(&coords, info->point, 0);
}
else
info->result = lv_obj_is_point_on_coords(img, info->point);
}
return res;
}
static lv_style_list_t * lv_img_get_style(lv_obj_t * img, uint8_t type)
{
lv_style_list_t * style_dsc_p;
switch(type) {
case LV_IMG_PART_MAIN:
style_dsc_p = &img->style_list;
break;
default:
style_dsc_p = NULL;
}
return style_dsc_p;
}
#endif
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