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CGBitmapContextCreate return NULL #71

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wanghongli123 opened this issue Jan 23, 2017 · 0 comments
Open

CGBitmapContextCreate return NULL #71

wanghongli123 opened this issue Jan 23, 2017 · 0 comments

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@wanghongli123
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CGBitmapInfo bitmapInfo = CGImageGetBitmapInfo(imageRef) & kCGBitmapAlphaInfoMask;

//Since iOS8 it's not allowed anymore to create contexts with unmultiplied Alpha info
if (bitmapInfo == kCGImageAlphaLast) {
    bitmapInfo = kCGImageAlphaPremultipliedLast;
}
if (bitmapInfo == kCGImageAlphaFirst) {
    bitmapInfo = kCGImageAlphaPremultipliedFirst;
}
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