diff --git a/porting/lv_port_disp_template.c b/porting/lv_port_disp_template.c
index ebd044e68..d95d8139d 100644
--- a/porting/lv_port_disp_template.c
+++ b/porting/lv_port_disp_template.c
@@ -172,10 +172,20 @@ static void mem_blend(lv_disp_drv_t * disp_drv, lv_color_t * dest, const lv_colo
 
 /* If your MCU has hardware accelerator (GPU) then you can use it to fill a memory with a color
  * It can be used only in buffered mode (LV_VDB_SIZE != 0 in lv_conf.h)*/
-static void mem_fill(lv_disp_drv_t * disp_drv, lv_color_t * dest_buf, const lv_area_t * dest_area,
-                      const lv_area_t * fill_area, lv_color_t color);
+static void mem_fill_cb(lv_disp_drv_t * disp_drv, lv_color_t * dest_buf, lv_coord_t dest_width,
+                    const lv_area_t * fill_area, lv_color_t color);
 {
     /*It's an example code which should be done by your GPU*/
+    uint32_t x, y;
+    dest_buf += dest_widht * fill_area->y1; /*Go to the first line*/
+
+    for(y = fill_area->y1; y < fill_area->y2; y++) {
+        for(x = fill_area->x1; x < fill_area->x2; x++) {
+            dest_buf[x] = color;
+        }
+        dest_buf+=des_width;    /*Go to the next line*/
+    }
+
 
     uint32_t i;
     for(i = 0; i < length; i++) {
diff --git a/src/lv_draw/lv_draw_basic.c b/src/lv_draw/lv_draw_basic.c
index 10b773160..857390337 100644
--- a/src/lv_draw/lv_draw_basic.c
+++ b/src/lv_draw/lv_draw_basic.c
@@ -42,7 +42,7 @@
  *  STATIC PROTOTYPES
  **********************/
 static void sw_mem_blend(lv_color_t * dest, const lv_color_t * src, uint32_t length, lv_opa_t opa);
-static void sw_color_fill(lv_area_t * mem_area, lv_color_t * mem, const lv_area_t * fill_area, lv_color_t color,
+static void sw_color_fill(lv_color_t * mem, lv_coord_t mem_width, const lv_area_t * fill_area, lv_color_t color,
                           lv_opa_t opa);
 
 #if LV_COLOR_SCREEN_TRANSP
@@ -150,13 +150,13 @@ void lv_draw_fill(const lv_area_t * cords_p, const lv_area_t * mask_p, lv_color_
     lv_coord_t w = lv_area_get_width(&vdb_rel_a);
     /*Don't use hw. acc. for every small fill (because of the init overhead)*/
     if(w < VFILL_HW_ACC_SIZE_LIMIT) {
-        sw_color_fill(&vdb->area, vdb->buf_act, &vdb_rel_a, color, opa);
+        sw_color_fill(vdb->buf_act, vdb_width, &vdb_rel_a, color, opa);
     }
     /*Not opaque fill*/
     else if(opa == LV_OPA_COVER) {
         /*Use hw fill if present*/
         if(disp->driver.mem_fill_cb) {
-            disp->driver.mem_fill_cb(&disp->driver, vdb->buf_act, &vdb->area, &vdb_rel_a, color);
+            disp->driver.mem_fill_cb(&disp->driver, vdb->buf_act, vdb_width, &vdb_rel_a, color);
         }
         /*Use hw blend if present and the area is not too small*/
         else if(lv_area_get_height(&vdb_rel_a) > VFILL_HW_ACC_SIZE_LIMIT && disp->driver.mem_blend_cb) {
@@ -179,7 +179,7 @@ void lv_draw_fill(const lv_area_t * cords_p, const lv_area_t * mask_p, lv_color_
         }
         /*Else use sw fill if no better option*/
         else {
-            sw_color_fill(&vdb->area, vdb->buf_act, &vdb_rel_a, color, opa);
+            sw_color_fill(vdb->buf_act, vdb_width, &vdb_rel_a, color, opa);
         }
 
     }
@@ -204,11 +204,11 @@ void lv_draw_fill(const lv_area_t * cords_p, const lv_area_t * mask_p, lv_color_
         }
         /*Use sw fill with opa if no better option*/
         else {
-            sw_color_fill(&vdb->area, vdb->buf_act, &vdb_rel_a, color, opa);
+            sw_color_fill(vdb->buf_act, vdb_width, &vdb_rel_a, color, opa);
         }
     }
 #else
-    sw_color_fill(&vdb->area, vdb->buf_act, &vdb_rel_a, color, opa);
+    sw_color_fill(vdb->buf_act, vdb_width, &vdb_rel_a, color, opa);
 #endif
 }
 
@@ -552,20 +552,19 @@ static void sw_mem_blend(lv_color_t * dest, const lv_color_t * src, uint32_t len
 }
 
 /**
- *
- * @param mem_area coordinates of 'mem' memory area
+ * Fill an area with a color
  * @param mem a memory address. Considered to a rectangular window according to 'mem_area'
+ * @param mem_width width of the 'mem' buffer
  * @param fill_area coordinates of an area to fill. Relative to 'mem_area'.
  * @param color fill color
  * @param opa opacity (0, LV_OPA_TRANSP: transparent ... 255, LV_OPA_COVER, fully cover)
  */
-static void sw_color_fill(lv_area_t * mem_area, lv_color_t * mem, const lv_area_t * fill_area, lv_color_t color,
+static void sw_color_fill(lv_color_t * mem, lv_coord_t mem_width, const lv_area_t * fill_area, lv_color_t color,
                           lv_opa_t opa)
 {
     /*Set all row in vdb to the given color*/
     lv_coord_t row;
     lv_coord_t col;
-    lv_coord_t mem_width = lv_area_get_width(mem_area);
 
     lv_disp_t * disp = lv_refr_get_disp_refreshing();
     if(disp->driver.set_px_cb) {
diff --git a/src/lv_hal/lv_hal_disp.h b/src/lv_hal/lv_hal_disp.h
index 98298709d..5c4cdd352 100644
--- a/src/lv_hal/lv_hal_disp.h
+++ b/src/lv_hal/lv_hal_disp.h
@@ -96,7 +96,7 @@ typedef struct _disp_drv_t
                          lv_opa_t opa);
 
     /*OPTIONAL: Fill a memory with a color (GPU only)*/
-    void (*mem_fill_cb)(struct _disp_drv_t * disp_drv, lv_color_t * dest_buf, const lv_area_t * dest_area,
+    void (*mem_fill_cb)(struct _disp_drv_t * disp_drv, lv_color_t * dest_buf, lv_coord_t dest_width,
                         const lv_area_t * fill_area, lv_color_t color);
 #endif