ImageIO Changes for Objective-C ImageIO CGImageProperties.h Added #def IMAGEIO_PNG_ALL_FILTERS Added #def IMAGEIO_PNG_FILTER_AVG Added #def IMAGEIO_PNG_FILTER_NONE Added #def IMAGEIO_PNG_FILTER_PAETH Added #def IMAGEIO_PNG_FILTER_SUB Added #def IMAGEIO_PNG_FILTER_UP Added #def IMAGEIO_PNG_NO_FILTERS Added kCGImagePropertyExifSubsecTimeOriginal Added kCGImagePropertyPNGCompressionFilter Added kCGImagePropertyTIFFTileLength Added kCGImagePropertyTIFFTileWidth CGImageSource.h Added kCGImageSourceSubsampleFactor ImageIOBase.h Added #def IIO_BRIDGED_TYPE