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d85a39e78c
Co-authored-by: Dany Liu <dany.yang.liu@email.com> Co-authored-by: Gabor Kiss-Vamosi <kisvegabor@gmail.com>
66 lines
1.9 KiB
ReStructuredText
66 lines
1.9 KiB
ReStructuredText
===============================
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OpenGL ES Display/Inputs driver
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===============================
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Overview
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--------
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| The **OpenGL ES** display/input `driver <https://github.com/lvgl/lvgl/src/drivers/opengles>`__ offers support for simulating the LVGL display and keyboard/mouse inputs in an desktop window created via GLFW.
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| It is an alternative to **Wayland**, **XCB**, **SDL** or **Qt**.
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The main purpose for this driver is for testing/debugging the LVGL application in an **OpenGL** simulation window.
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Prerequisites
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-------------
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The OpenGL driver uses GLEW GLFW to access the OpenGL window manager.
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1. Install GLEW and GLFW: ``sudo apt-get install libglew-dev libglfw3-dev``
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Configure OpenGL driver
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-----------------------
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1. Required linked libraries: -lGL -lGLEW -lglfw
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2. Enable the OpenGL driver support in lv_conf.h, by cmake compiler define or by KConfig
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.. code:: c
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#define LV_USE_OPENGLES 1
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Usage
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-----
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.. code:: c
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#include "lvgl/lvgl.h"
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#include "lvgl/examples/lv_examples.h"
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#include "lvgl/demos/lv_demos.h"
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int main()
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{
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lv_init();
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lv_display_t * disp = lv_glfw_window_create(480, 272);
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lv_indev_t * mouse = lv_glfw_mouse_create();
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lv_indev_set_group(mouse, lv_group_get_default());
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lv_indev_set_display(mouse, disp);
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lv_display_set_default(disp);
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LV_IMAGE_DECLARE(mouse_cursor_icon); /*Declare the image file.*/
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lv_obj_t * cursor_obj;
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cursor_obj = lv_image_create(lv_screen_active()); /*Create an image object for the cursor */
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lv_image_set_src(cursor_obj, &mouse_cursor_icon); /*Set the image source*/
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lv_indev_set_cursor(mouse, cursor_obj); /*Connect the image object to the driver*/
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lv_demo_widgets();
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while (1)
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{
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uint32_t time_till_next = lv_timer_handler();
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lv_delay_ms(time_till_next);
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}
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return 0;
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}
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