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Update the code comments

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DreamPiggy 2023-11-17 00:14:34 +08:00 committed by GitHub
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SDWebImage/Core/SDImageIOAnimatedCoder.m
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@ -208,7 +208,7 @@ static CGImageRef SDImageIOPNGPluginBuggyCreateWorkaround(CGImageRef cgImage) CF
static BOOL SDImageIOPNGPluginBuggyNeedWorkaround(void) {
// See: #3605 FB13322459
// ImageIO on iOS 17 (17.0~17.2), there is one serious problem on ImageIO PNG plugin. The decode result for indexed color PNG use the wrong CGImageAlphaInfo
// The returned CGImageAlphaInfo is alpha last, but the actual bitmap data is premultiplied alpha first, which cause many runtime render bug.
// The returned CGImageAlphaInfo is alpha last, but the actual bitmap data is premultiplied alpha last, which cause many runtime render bug.
// So, we do a hack workaround:
// 1. Decode a indexed color PNG in runtime
// 2. If the bitmap is premultiplied alpha, then assume it's buggy