Raw pixel data

Question

Any suggestions of how to get to a CGImageRef or UIImage from raw pixel data in open gl?
uint8_t testColor[4 * 480 * 480]; // 4 bytes, RGBA
glReadPixels(0,0,480,480,GL_RGBA, GLUNSIGNEDBYTE, &testColor);

Answer 1

i have a feeling someone is going to help me eventually
This creates an image, but it doesn't look like the one i draw. Any tips on figuring out the CGImageCreate parameters for something in GL_FLOAT raw pixel data. I assume that is where I am going wrong.
size_t size = 10;
float testColor[4 * size * size]; // 4 bytes, RGBA
glReadPixels(0,0,size,size,GL_RGBA, GL_FLOAT, &testColor);
size_t w = size;
size_t h = size;
size_t bitsPerComponent = 32;
size_t bitsPerPixel = 32;
size_t bytesPerRow = 4 * w;
CGDataProviderRef provider = CGDataProviderCreateWithData(NULL, testColor, 4 * 480 * 480, NULL);
CGBitmapInfo bitmapInfo = kCGBitmapByteOrderDefault;
CGColorRenderingIntent intent = kCGRenderingIntentDefault;
CGColorSpaceRef space = CGColorSpaceCreateDeviceRGB();
CGImageRef img = CGImageCreate(w, h, bitsPerComponent, bitsPerPixel, bytesPerRow, space, bitmapInfo, provider, NULL, NO, intent);
UIImage* result = UIImage imageWithCGImage:img;
NSData *imgData = UIImagePNGRepresentation(result);
imgData writeToFile:@"/Users/alexander/Desktop/test.png" atomically:YES;