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lvgl/contrib: allow for SDL display driver height/width to be adjusted #18463

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Sep 2, 2022
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lvgl/contrib: allow for SDL display driver height/width to be adjusted #18463

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lvgl/contrib: allow for SDL display driver height/width to be adjusted 
Enables the SDL driver for LVGL to utilize a user prescribed width/height for display resolution when utilizing SDL, or rely on the SDL_HOR/VER_RES provided by lv_drv_conf.h in lv_drivers
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@tvanfossen
tvanfossen committed Sep 2, 2022
commit 4831fd68ab3cfa6dd0475fc1e9c50fda7130c6b0
15 changes: 15 additions & 0 deletions pkg/lvgl/contrib/lvgl.c
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Original file line number Diff line number Diff line change
Expand Up @@ -54,6 +54,18 @@
#define LVGL_THREAD_FLAG (1 << 7)
#endif

#if IS_USED(MODULE_LV_DRIVERS_SDL)

#ifndef LCD_SCREEN_WIDTH
#define LCD_SCREEN_WIDTH SDL_HOR_RES
#endif

#ifndef LCD_SCREEN_HEIGHT
#define LCD_SCREEN_HEIGHT SDL_VER_RES
#endif

#endif

static kernel_pid_t _task_thread_pid;

static lv_disp_draw_buf_t disp_buf;
Expand All @@ -79,6 +91,7 @@ static void _disp_map(lv_disp_drv_t *drv, const lv_area_t *area, lv_color_t *col
const disp_dev_area_t disp_area = {
area->x1, area->x2, area->y1, area->y2
};

disp_dev_map(_screen_dev->display, &disp_area, (const uint16_t *)color_p);

LOG_DEBUG("[lvgl] flush display\n");
Expand Down Expand Up @@ -141,6 +154,8 @@ void lvgl_init(screen_dev_t *screen_dev)
sdl_init();
/* Used when `LV_VDB_SIZE != 0` in lv_conf.h (buffered drawing) */
disp_drv.flush_cb = sdl_display_flush;
disp_drv.hor_res = LCD_SCREEN_WIDTH;
disp_drv.ver_res = LCD_SCREEN_HEIGHT;
#else
disp_drv.flush_cb = _disp_map;
/* Configure horizontal and vertical resolutions based on the
Expand Down