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Fixed Alpha chanel detection when decoding images.

This commit is contained in:
Jure Žove 2012-10-28 19:58:14 +01:00
parent ab07f23fbc
commit e6ede1104c
1 changed files with 3 additions and 1 deletions
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4
SDWebImage/SDWebImageDecoder.m
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@ -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;