Accessing CIImage bytes, crashes app

Question

I'm porting some OSX code to iOS and need to access the bytes of a CIImage. The OSX version does this with a NSBitmapImageRep, but on iOS i need to jump trough some hoops.

Here is the code i'm trying to run

CIContext *context = [CIContext contextWithOptions:nil];
CGImageRef cgImage = [context createCGImage:image fromRect:image.extent];
CGDataProviderRef provider = CGImageGetDataProvider(cgImage);
CFDataRef data = CGDataProviderCopyData(provider);

CGRect extent = [image extent];
//png.Load((UInt8*)CFDataGetBytePtr(data), extent.size.width, extent.size.height, true);

CFRelease(data);
//CGDataProviderRelease(provider);

It works as expected, but after a while the app crashes. I have no idea why. I'm taking a guess at memory leak / out of bounds memory. As far as i can tell everything is being freed correctly... If i comment those lines out, nothing crashes. If i comment CGDataProviderRelease back in the app crashes almost immediately.

Answer 1

I think you need to CFRelease(cgImage) - you used "create" to create it no?