feat(image_cache): add resize function to image cache (#5829)

src/misc/cache/lv_cache.c

@@ -261,6 +261,7 @@ static lv_cache_entry_t * cache_add_internal_no_lock(lv_cache_t * cache, const v
     lv_cache_reserve_cond_res_t reserve_cond_res = cache->clz->reserve_cond_cb(cache, key, 0, user_data);
     if(reserve_cond_res == LV_CACHE_RESERVE_COND_TOO_LARGE) {
         LV_LOG_ERROR("data %p is too large that exceeds max size (%" LV_PRIu32 ")", key, cache->max_size);
+        return NULL;
     }
 
     for(; reserve_cond_res == LV_CACHE_RESERVE_COND_NEED_VICTIM;

src/misc/cache/lv_image_cache.c

@@ -59,6 +59,19 @@ void lv_image_cache_drop(const void * src)
 #endif
 }
 
+void lv_image_cache_resize(uint32_t new_size, bool evict_now)
+{
+#if LV_CACHE_DEF_SIZE > 0
+    lv_cache_set_max_size(img_cache_p, new_size, NULL);
+    if(evict_now) {
+        lv_cache_reserve(img_cache_p, new_size, NULL);
+    }
+#else
+    LV_UNUSED(new_size);
+    LV_UNUSED(evict_now);
+#endif
+}
+
 void lv_image_header_cache_drop(const void * src)
 {
 #if LV_IMAGE_HEADER_CACHE_DEF_CNT > 0
@@ -78,6 +91,19 @@ void lv_image_header_cache_drop(const void * src)
 #endif
 }
 
+void lv_image_header_cache_resize(uint32_t new_size, bool evict_now)
+{
+#if LV_IMAGE_HEADER_CACHE_DEF_CNT > 0
+    lv_cache_set_max_size(img_header_cache_p, new_size, NULL);
+    if(evict_now) {
+        lv_cache_reserve(img_header_cache_p, new_size, NULL);
+    }
+#else
+    LV_UNUSED(new_size);
+    LV_UNUSED(evict_now);
+#endif
+}
+
 /**********************
  *   STATIC FUNCTIONS
  **********************/

src/misc/cache/lv_image_cache.h

@@ -33,6 +33,13 @@ extern "C" {
  */
 void lv_image_cache_drop(const void * src);
 
+/**
+ * Resize image cache.
+ * @param new_size  new size of the cache in bytes.
+ * @param evict_now true: evict the images should be removed by the eviction policy, false: wait for the next cache cleanup.
+ */
+void lv_image_cache_resize(uint32_t new_size, bool evict_now);
+
 /**
  * Invalidate image header cache. Use NULL to invalidate all image headers.
  * It's also automatically called when an image is invalidated.
@@ -40,6 +47,13 @@ void lv_image_cache_drop(const void * src);
  */
 void lv_image_header_cache_drop(const void * src);
 
+/**
+ * Resize image header cache.
+ * @param new_size  new size of the cache in count of image headers.
+ * @param evict_now true: evict the image headers should be removed by the eviction policy, false: wait for the next cache cleanup.
+ */
+void lv_image_header_cache_resize(uint32_t new_size, bool evict_now);
+
 /*************************
  *    GLOBAL VARIABLES
  *************************/