Merge pull request #3219 from dreampiggy/behavior_transformer_store_q…

…uery_default_disk

Change the .originalStoreCaheType and .originalQueryCacheType into .disk, Now we will store the full image data into disk and re-query the full image data by default

SDWebImage/Core/SDWebImageDefine.h

@@ -275,14 +275,14 @@ FOUNDATION_EXPORT SDWebImageContextOption _Nonnull const SDWebImageContextStoreC
 
 /**
  The same behavior like `SDWebImageContextQueryCacheType`, but control the query cache type for the original image when you use image transformer feature. This allows the detail control of cache query for these two images. For example, if you want to query the transformed image from both memory/disk cache, query the original image from disk cache only, use `[.queryCacheType : .all, .originalQueryCacheType : .disk]`
- If not provide or the value is invalid, we will use `SDImageCacheTypeNone`, which does not query the original image from cache. (NSNumber)
+ If not provide or the value is invalid, we will use `SDImageCacheTypeDisk`, which query the original full image data from disk cache after transformed image cache miss. This is suitable for most common cases to avoid re-downloading the full data for different transform variants. (NSNumber)
  @note Which means, if you set this value to not be `.none`, we will query the original image from cache, then do transform with transformer, instead of actual downloading, which can save bandwidth usage.
  */
 FOUNDATION_EXPORT SDWebImageContextOption _Nonnull const SDWebImageContextOriginalQueryCacheType;
 
 /**
  The same behavior like `SDWebImageContextStoreCacheType`, but control the store cache type for the original image when you use image transformer feature. This allows the detail control of cache storage for these two images. For example, if you want to store the transformed image into both memory/disk cache, store the original image into disk cache only, use `[.storeCacheType : .all, .originalStoreCacheType : .disk]`
- If not provide or the value is invalid, we will use `SDImageCacheTypeNone`, which does not store the original image into cache. (NSNumber)
+ If not provide or the value is invalid, we will use `SDImageCacheTypeDisk`, which store the original full image data into disk cache after storing the transformed image. This is suitable for most common cases to avoid re-downloading the full data for different transform variants. (NSNumber)
  @note This only store the original image, if you want to use the original image without downloading in next query, specify `SDWebImageContextOriginalQueryCacheType` as well.
  */
 FOUNDATION_EXPORT SDWebImageContextOption _Nonnull const SDWebImageContextOriginalStoreCacheType;

SDWebImage/Core/SDWebImageManager.m

@@ -313,7 +313,7 @@ - (void)callOriginalCacheProcessForOperation:(nonnull SDWebImageCombinedOperatio
         }
     }
     // Get the original query cache type
-    SDImageCacheType originalQueryCacheType = SDImageCacheTypeNone;
+    SDImageCacheType originalQueryCacheType = SDImageCacheTypeDisk;
     if (context[SDWebImageContextOriginalQueryCacheType]) {
         originalQueryCacheType = [context[SDWebImageContextOriginalQueryCacheType] integerValue];
     }
@@ -461,7 +461,7 @@ - (void)callStoreCacheProcessForOperation:(nonnull SDWebImageCombinedOperation *
         storeCacheType = [context[SDWebImageContextStoreCacheType] integerValue];
     }
     // the original store image cache type
-    SDImageCacheType originalStoreCacheType = SDImageCacheTypeNone;
+    SDImageCacheType originalStoreCacheType = SDImageCacheTypeDisk;
     if (context[SDWebImageContextOriginalStoreCacheType]) {
         originalStoreCacheType = [context[SDWebImageContextOriginalStoreCacheType] integerValue];
     }