arch(sdl) migrated to use new backend architecture (#2840)

* migrated to use new backend architecture

* formatted code

* with direct_mode blend coordinates are working now

* added draw_img_core to backend

* moving from gpu/sdl to draw/sdl

* updated format

* updated format

* fixed include path

* fixing build issue

src/draw/sdl/lv_draw_sdl_mask.h

@@ -0,0 +1,57 @@
+/**
+ * @file lv_draw_sdl_mask.h
+ *
+ */
+
+#ifndef LV_DRAW_SDL_MASK_H
+#define LV_DRAW_SDL_MASK_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*********************
+ *      INCLUDES
+ *********************/
+
+#include "../../lv_conf_internal.h"
+
+#include LV_GPU_SDL_INCLUDE_PATH
+
+#include "../../misc/lv_area.h"
+#include "../../misc/lv_color.h"
+
+/*********************
+ *      DEFINES
+ *********************/
+
+/**********************
+ *      TYPEDEFS
+ **********************/
+
+/**********************
+ * GLOBAL PROTOTYPES
+ **********************/
+
+
+lv_opa_t * lv_draw_mask_dump(const lv_area_t * coords, const int16_t * ids, int16_t ids_count);
+
+SDL_Surface * lv_sdl_create_mask_surface(lv_opa_t * pixels, lv_coord_t width, lv_coord_t height, lv_coord_t stride);
+
+SDL_Texture * lv_sdl_create_mask_texture(SDL_Renderer * renderer, lv_opa_t * pixels, lv_coord_t width,
+                                         lv_coord_t height, lv_coord_t stride);
+
+SDL_Surface * lv_sdl_apply_mask_surface(const lv_area_t * coords, const int16_t * ids, int16_t ids_count);
+
+SDL_Texture *
+lv_sdl_gen_mask_texture(SDL_Renderer * renderer, const lv_area_t * coords, const int16_t * ids, int16_t ids_count);
+
+/**********************
+ *      MACROS
+ **********************/
+
+#ifdef __cplusplus
+} /*extern "C"*/
+#endif
+
+#endif /*LV_DRAW_SDL_MASK_H*/