From c609027314be09f598d2a2a75192b10f89bf1e95 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jure=20=C5=BDove?= <jure.pase.kure@gmail.com>
Date: Sun, 28 Oct 2012 19:58:14 +0100
Subject: [PATCH] Fixed Alpha chanel detection when decoding images.

---
 SDWebImage/SDWebImageDecoder.m | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/SDWebImage/SDWebImageDecoder.m b/SDWebImage/SDWebImageDecoder.m
index 31b0cb2..06b6e2d 100644
--- a/SDWebImage/SDWebImageDecoder.m
+++ b/SDWebImage/SDWebImageDecoder.m
@@ -100,7 +100,9 @@ static SDWebImageDecoder *sharedInstance;
     CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();
     CGImageAlphaInfo alphaInfo = CGImageGetAlphaInfo(imageRef);
 
-    BOOL imageHasAlphaInfo = (alphaInfo != kCGImageAlphaNone);
+    BOOL imageHasAlphaInfo = (alphaInfo != kCGImageAlphaNone &&
+                              alphaInfo != kCGImageAlphaNoneSkipFirst &&
+                              alphaInfo != kCGImageAlphaNoneSkipLast);
 
     int bytesPerPixel = imageHasAlphaInfo ? 4 : 3;
     CGBitmapInfo bitmapInfo = imageHasAlphaInfo ? kCGImageAlphaPremultipliedLast : kCGImageAlphaNone;