diff --git a/src/draw/sdl/lv_draw_sdl.h b/src/draw/sdl/lv_draw_sdl.h
index 1bd744ce1f..9b44a7b2f6 100644
--- a/src/draw/sdl/lv_draw_sdl.h
+++ b/src/draw/sdl/lv_draw_sdl.h
@@ -44,6 +44,7 @@ typedef struct {
      * Render for display driver
      */
     SDL_Renderer * renderer;
+    void * user_data;
 } lv_draw_sdl_drv_param_t;
 
 typedef struct {
diff --git a/src/widgets/lv_canvas.c b/src/widgets/lv_canvas.c
index e43daf1505..a55429bdf3 100644
--- a/src/widgets/lv_canvas.c
+++ b/src/widgets/lv_canvas.c
@@ -14,6 +14,8 @@
 
 #if LV_USE_CANVAS != 0
 
+#include "../draw/sw/lv_draw_sw.h"
+
 /*********************
  *      DEFINES
  *********************/
@@ -844,12 +846,10 @@ static void init_fake_disp(lv_obj_t * canvas, lv_disp_t * disp, lv_disp_drv_t *
     disp->driver->hor_res = dsc->header.w;
     disp->driver->ver_res = dsc->header.h;
 
-    lv_disp_t * canvas_disp = lv_obj_get_disp(canvas);
-
-    lv_draw_ctx_t * draw_ctx = lv_mem_alloc(canvas_disp->driver->draw_ctx_size);
+    lv_draw_ctx_t * draw_ctx = lv_mem_alloc(sizeof(lv_draw_sw_ctx_t));
     LV_ASSERT_MALLOC(draw_ctx);
     if(draw_ctx == NULL)  return;
-    canvas_disp->driver->draw_ctx_init(disp->driver, draw_ctx);
+    lv_draw_sw_init_ctx(drv, draw_ctx);
     disp->driver->draw_ctx = draw_ctx;
     draw_ctx->clip_area = clip_area;
     draw_ctx->buf_area = clip_area;
@@ -860,8 +860,9 @@ static void init_fake_disp(lv_obj_t * canvas, lv_disp_t * disp, lv_disp_drv_t *
 
 static void deinit_fake_disp(lv_obj_t * canvas, lv_disp_t * disp)
 {
-    lv_disp_t * canvas_disp = lv_obj_get_disp(canvas);
-    canvas_disp->driver->draw_ctx_deinit(disp->driver, disp->driver->draw_ctx);
+    LV_UNUSED(canvas);
+    lv_draw_sw_deinit_ctx(disp->driver, disp->driver->draw_ctx);
+    lv_mem_free(disp->driver->draw_ctx);
 }