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Starting with version 2.5, ColorSync supports an optional profile tag for video card gamma. The tag specifies gamma information, stored either as a formula or in table format, to be loaded into the video card when the profile containing the tag is put into use. As of version 2.5, the only ColorSync function that attempts to take advantage of video card gamma data is
CMSetProfileByAVID
.
The following sections describe the constants you use to work with the video card gamma profile tag: