fix(layer): Update calculation for overlay used memory (#5504)

src/draw/lv_draw.c

@@ -370,6 +370,7 @@ void * lv_draw_layer_alloc_buf(lv_layer_t * layer)
     /*If the buffer of the layer is not allocated yet, allocate it now*/
     int32_t w = lv_area_get_width(&layer->buf_area);
     int32_t h = lv_area_get_height(&layer->buf_area);
+    uint32_t layer_size_byte = h * lv_draw_buf_width_to_stride(w, layer->color_format);
 
     layer->draw_buf = lv_draw_buf_create(w, h, layer->color_format, 0);
 
@@ -378,6 +379,9 @@ void * lv_draw_layer_alloc_buf(lv_layer_t * layer)
         return NULL;
     }
 
+    _draw_info.used_memory_for_layers_kb += get_layer_size_kb(layer_size_byte);
+    LV_LOG_INFO("Layer memory used: %" LV_PRIu32 " kB\n", _draw_info.used_memory_for_layers_kb);
+
     if(lv_color_format_has_alpha(layer->color_format)) {
         lv_draw_buf_clear(layer->draw_buf, NULL);
     }