static void printPNG(CGImageRef image) { RetainPtr<CFMutableDataRef> imageData(AdoptCF, CFDataCreateMutable(0, 0)); RetainPtr<CGImageDestinationRef> imageDest(AdoptCF, CGImageDestinationCreateWithData(imageData.get(), kUTTypePNG, 1, 0)); CGImageDestinationAddImage(imageDest.get(), image, 0); CGImageDestinationFinalize(imageDest.get()); printf("Content-Length: %lu\n", CFDataGetLength(imageData.get())); fwrite(CFDataGetBytePtr(imageData.get()), 1, CFDataGetLength(imageData.get()), stdout); }
static void dumpBitmap(CGContextRef bitmapContext, const char* checksum) { RetainPtr<CGImageRef> image(AdoptCF, CGBitmapContextCreateImage(bitmapContext)); RetainPtr<CFMutableDataRef> imageData(AdoptCF, CFDataCreateMutable(0, 0)); RetainPtr<CGImageDestinationRef> imageDest(AdoptCF, CGImageDestinationCreateWithData(imageData.get(), kUTTypePNG, 1, 0)); CGImageDestinationAddImage(imageDest.get(), image.get(), 0); CGImageDestinationFinalize(imageDest.get()); const unsigned char* data = CFDataGetBytePtr(imageData.get()); const size_t dataLength = CFDataGetLength(imageData.get()); printPNG(data, dataLength, checksum); }