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lv_img: fix caching when image source changes

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Gabor Kiss-Vamosi
2019-09-30 06:21:18 +02:00
parent 3aac71b16e
commit a35a79ba4e
1 changed files with 7 additions and 2 deletions
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src/lv_objx/lv_img.c
+7 -2
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@@ -159,15 +159,20 @@ void lv_img_set_src(lv_obj_t * img, const void * src_img)
} else if(src_type == LV_IMG_SRC_FILE || src_type == LV_IMG_SRC_SYMBOL) {
/* If the new and the old src are the same then it was only a refresh.*/
if(ext->src != src_img) {
/*If memory was allocated because of the previous `src_type` then free it*/
const void * old_src = NULL;
/* If memory was allocated because of the previous `src_type` then save its pointer and free after allocation.
* It's important to allocate first to be sure the new data will be on a new address.
* Else `img_cache` wouldn't see the change in source.*/
if(ext->src_type == LV_IMG_SRC_FILE || ext->src_type == LV_IMG_SRC_SYMBOL) {
lv_mem_free(ext->src);
old_src = ext->src;
}
char * new_str = lv_mem_alloc(strlen(src_img) + 1);
lv_mem_assert(new_str);
if(new_str == NULL) return;
strcpy(new_str, src_img);
ext->src = new_str;
if(old_src) lv_mem_free(old_src);
}
}