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Inside Macintosh: Advanced Color Imaging Reference /

Chapter 3 - ColorSync Manager Reference for Applications and Device Drivers / ColorSync Manager Functions

Converting Between Color Spaces /

CMConvertXYZToLab

Converts colors specified in the XYZ color space to the L*a*b* color space.

pascal CMError CMConvertXYZToLab (
const CMColor *src, 
const CMXYZColor *white,
CMColor *dst, 
unsigned long count);

src

A pointer to an array containing the list of XYZ colors to convert to L*a*b* colors.

white

A pointer to a reference white point.

dst

A pointer to an array containing the list of L*a*b* colors resulting from the conversion.

count

The number of colors to convert.

function result

A result code of type CMError. See "Result Codes" (page 3-174) for a list of ColorSync-specific result codes.

DISCUSSION

The CMConvertXYZToLab function converts one or more colors defined in the XYZ color space to equivalent colors defined in the L*a*b* color space. Both color spaces are device independent.

If your application does not require that you preserve the source color list, you can pass the pointer to the same color list array as the src and dst parameters and allow the CMConvertXYZToLab function to overwrite the source colors with the resulting converted color specifications.

SEE ALSO

For information about the color conversion routines in previous versions of ColorSync, see "Converting Between Color Spaces" (page 3-143).