- (CGImageRef) CreateARGBImageWithABGRImage: (CGImageRef) abgrImageRef {

// the data retrieved from the image ref has 4 bytes per pixel (ABGR).

CFDataRef abgrData = CGDataProviderCopyData(CGImageGetDataProvider(abgrImageRef));

UInt8 *pixelData = (UInt8 *) CFDataGetBytePtr(abgrData);

int length = CFDataGetLength(abgrData);

// abgr to rgba

// swap the blue and red components for each pixel...

UInt8 tmpByte = 0;

for (int index = 0; index < length; index+= 4) {

tmpByte = pixelData[index + 1];

pixelData[index + 1] = pixelData[index + 3];

pixelData[index + 3] = tmpByte;

}

// grab the bgra image info

size_t width = CGImageGetWidth(abgrImageRef);

size_t height = CGImageGetHeight(abgrImageRef);

size_t bitsPerComponent = CGImageGetBitsPerComponent(abgrImageRef);

size_t bitsPerPixel = CGImageGetBitsPerPixel(abgrImageRef);

size_t bytesPerRow = CGImageGetBytesPerRow(abgrImageRef);

CGColorSpaceRef colorspace = CGImageGetColorSpace(abgrImageRef);

CGBitmapInfo bitmapInfo = CGImageGetBitmapInfo(abgrImageRef);

// create the argb image

CFDataRef argbData = CFDataCreate(NULL, pixelData, length);

CGDataProviderRef provider = CGDataProviderCreateWithCFData(argbData);

CGImageRef argbImageRef = CGImageCreate(width, height, bitsPerComponent, bitsPerPixel, bytesPerRow, 

colorspace, bitmapInfo, provider, NULL, true, kCGRenderingIntentDefault);

// release what we can

CFRelease(abgrData);

CFRelease(argbData);

CGDataProviderRelease(provider);

// return the pretty new image

return argbImageRef;

}

So there you have it. I hope this helps someone else. Suggestions for improvements on this are certainly welcome.