fix potential image encode error in iOS6.

ibireme · ibireme · commit 84501d34950f · 2016-05-31T00:10:40.000+08:00
diff --git a/YYImage/YYImageCoder.m b/YYImage/YYImageCoder.m
@@ -822,7 +822,7 @@ Try convert with vImageConvert_AnyToAny() (avaliable since iOS 7.0).
     } else {
         contextBitmapInfo |= alphaFirst ? kCGImageAlphaPremultipliedFirst : kCGImageAlphaPremultipliedLast;
     }
-    CGContextRef context = CGBitmapContextCreate(NULL, width, height, 8, 32, YYCGColorSpaceGetDeviceRGB(), contextBitmapInfo);
+    CGContextRef context = CGBitmapContextCreate(NULL, width, height, 8, 0, YYCGColorSpaceGetDeviceRGB(), contextBitmapInfo);
     if (!context) goto fail;
     
     CGContextDrawImage(context, CGRectMake(0, 0, width, height), srcImage); // decode and convert

Original file line number	Diff line number	Diff line change
`@@ -822,7 +822,7 @@ Try convert with vImageConvert_AnyToAny() (avaliable since iOS 7.0).`
`822`	`822`	`} else {`
`823`	`823`	`contextBitmapInfo \|= alphaFirst ? kCGImageAlphaPremultipliedFirst : kCGImageAlphaPremultipliedLast;`
`824`	`824`	`}`
`825`		`- CGContextRef context = CGBitmapContextCreate(NULL, width, height, 8, 32, YYCGColorSpaceGetDeviceRGB(), contextBitmapInfo);`
	`825`	`+ CGContextRef context = CGBitmapContextCreate(NULL, width, height, 8, 0, YYCGColorSpaceGetDeviceRGB(), contextBitmapInfo);`
`826`	`826`	`if (!context) goto fail;`
`827`	`827`
`828`	`828`	`CGContextDrawImage(context, CGRectMake(0, 0, width, height), srcImage); // decode and convert`