From b6f4692439ffc8af19f0a792a5616c43ff8b2d68 Mon Sep 17 00:00:00 2001
From: DreamPiggy <lizhuoli1126@126.com>
Date: Sat, 18 Jan 2020 18:43:56 +0800
Subject: [PATCH] Supports the UIImageView to show Prorgessive Animated Image's
 first poster frame, match the behavior of built-in coders

---
 SDWebImageWebPCoder/Classes/SDImageWebPCoder.m | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/SDWebImageWebPCoder/Classes/SDImageWebPCoder.m b/SDWebImageWebPCoder/Classes/SDImageWebPCoder.m
index e068073..5412ee4 100644
--- a/SDWebImageWebPCoder/Classes/SDImageWebPCoder.m
+++ b/SDWebImageWebPCoder/Classes/SDImageWebPCoder.m
@@ -347,6 +347,14 @@ static CGSize SDCalculateThumbnailSize(CGSize fullSize, BOOL preserveAspectRatio
 - (UIImage *)incrementalDecodedImageWithOptions:(SDImageCoderOptions *)options {
     UIImage *image;
     
+    // For Animated WebP Images, progressive decoding only return the first frame.
+    // If you want progressive animation, use the SDAniamtedCoder protocol method instead.
+    if (_demux) {
+        SD_LOCK(_lock);
+        image = [self safeStaticImageFrame];
+        SD_UNLOCK(_lock);
+    }
+    // For Static WebP images
     int width = 0;
     int height = 0;
     int last_y = 0;