49     CGImageRef imageRef = CGImageSourceCreateImageAtIndex( sourceRef, 0, NULL );  in CheckFile()  local
51     if( !imageRef ) return false;  in CheckFile()
85     CGImageRelease( imageRef );  in Close()
95     imageRef = NULL;  in ReadHeader()
107     imageRef = CGImageSourceCreateImageAtIndex( sourceRef, 0, NULL );  in ReadHeader()
109     if( !imageRef )  in ReadHeader()
112     m_width = CGImageGetWidth( imageRef );  in ReadHeader()
113     m_height = CGImageGetHeight( imageRef );  in ReadHeader()
115     CGColorSpaceRef colorSpace = CGImageGetColorSpace( imageRef );  in ReadHeader()
182     CGContextDrawImage( context, rect, imageRef );  in ReadData()
349     CGImageRef imageRef = CGBitmapContextCreateImage( context );  in WriteImage()  local
351     if( !imageRef )  in WriteImage()
364         CGImageRelease( imageRef );  in WriteImage()
376         CGImageRelease( imageRef );  in WriteImage()
382     CGImageDestinationAddImage(destRef, imageRef, NULL);  in WriteImage()
390     CGImageRelease( imageRef );      in WriteImage()