Inside Macintosh: QuickDraw GX Objects /

Chapter 4 - Colors and Color-Related Objects / About Color Profile Objects

The Default Color Profile

QuickDraw GX maintains a default color profile that it uses for color matching when no color profile is explicitly provided--that is, when the profile field of a color structure or bitmap structure is nil. The default color profile reflects the color response of the Apple 13-inch color monitor, as defined by ColorSync version 1.0.

You do not create a copy of the default color profile by calling the GXNewColorProfile function; that function requires you to supply profile data for the object you are creating. Also, you cannot change the characteristics of the default color profile object; there is no GXSetDefaultColorProfile function.

You can determine the actual profile chromaticities used for the default QuickDraw GX color profile by retrieving it and examining its profile data.