ImageGear for C and C++ on Linux v20.0 - Updated
API Reference Guide > Core Component API Reference > Core Component Functions Reference > Utility Functions > IG_util_colorspace_extra_count_get

This function returns the number of extra channels in the specified color space.


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AT_UINT ACCUAPI IG_util_colorspace_extra_count_get(
        enumIGColorSpaceIDs colorSpace,
        AT_UINT totalChannelCount


Name Type Description
colorSpace enumIGColorSpaceIDs Color space ID.
totalChannelCount AT_UINT Total number of channels in the color space.

Return Value:

Returns the number of extra channels.

Supported Raster Image Formats:

This function does not process image pixels.


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enumIGColorSpaceIDs colorSpace = IG_COLOR_SPACE_ID_RGBAEx;
AT_UINT nExtra;         /* Number of extra channels */
nExtra = IG_util_colorspace_extra_count_get(colorSpace);
/* nExtra is 1 */


You must specify the total number of channels in the color space in order for this to be calculated.

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