QuickTime 4 Reference

Getting ColorSyncProfiles

QuickTime 4 adds support for extracting embedded ColorSync profiles from some image formats. Of the image formats supported by QuickTime 4, these are GIF, JPEG, PNG, QuickDraw Picture, QuickTime Image, and TIFF. Image files containing ColorSync profiles describe their own colorspaces in a self-contained manner.

Since it was introduced in QuickTime 3.0, the PNG graphics importer has performed built-in gamma correction. QuickTime 4 adds a flag that can you can set using the GraphicsImportSetFlags function to turn this off. This is useful for applications that want to use some other mechanism for colorspace correction, such as ColorSync.

The following functions are new to QuickTime 4:

GraphicsImportGetColorSyncProfile
GraphicsImportSetFlags
GraphicsImportGetFlags