CGBitmapContextCreate return NULL #71
Description
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;
}