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XcmsConversionProc()					  XcmsConversionProc()

Name
  XcmsConversionProc  –	 interface definition for the procedure for color
  conversion between device-independent color spaces.

Synopsis
  For conversion between device-independent color spaces: typedef  Status
  (*XcmsConversionProc)(ccc, white_point, colors, ncolors)
	   XcmsCCC ccc;
	   XcmsColor *white_point[];
	   XcmsColor colors[];
	   unsigned int ncolors;

  For conversion between CIEXYZ and device-dependent color spaces:

  typedef  Status  (*XcmsConversionProc)(ccc, colors, ncolors, CIcompres‐
  sion_flags_return)
	   XcmsCCC ccc;
	   XcmsColor colors[];
	   unsigned int ncolors;
	   Bool compression_flags_return[];

Arguments
  ccc	    Specifies the color conversion context.

  white_point
	    Specifies the white point associated with the color	 specifi‐
	    cations.  Pixel member is ignored and the color specification
	    is left unchanged upon return.

  colors    Specifies an array of color	 specifications.   Pixel  members
	    are ignored and remain unchanged upon return.

  ncolors   Specifies  the  number  of	XcmsColor structures in the color
	    specification array.

  compression_flags_return
	    Specifies an array of Boolean values (or NULL)  for	 returned
	    information that indicates if the color was compressed.  Dur‐
	    ing conversion, when a color is found to out of  gamut,  this
	    argument  is  passed  in the gamut compression function call.
	    For an example, refer to  the  source  code	 for  XcmsCIEXYZ‐
	    ToRGBi.

Returns
  Zero on failure, non-zero on success.

Availability
  Release 5 and later.

Description
  An XcmsConversionProc procedure converts XcmsColor between device-inde‐
  pendent color space encodings.

  Procedures provided and  accessible  in  Xlib	 for  conversion  between
  device-independent color spaces are:

  ·  XcmsCIELabToCIEXYZ	 –  Converts color specifications from XcmsCIELab
     to XcmsCIELab.

  ·  XcmsCIELuvToCIEuvY – Converts color specifications	 from  XcmsCIELuv
     to XcmsCIEuvY.

  ·  XcmsCIEXYZToCIELab	 –  Converts color specifications from XcmsCIEXYZ
     to XcmsCIELab.

  ·  XcmsCIEXYZToCIEuvY – Converts color specifications	 from  XcmsCIEXYZ
     to XcmsCIEuvY.

  ·  XcmsCIEXYZToCIExyY	 –  Converts color specifications from XcmsCIEXYZ
     to XcmsCIExyY.

  ·  XcmsCIEuvYToCIELuv – Converts color specifications	 from  XcmsCIEuvY
     to XcmsCIELuv.

  ·  XcmsCIEuvYToCIEXYZ	 –  Converts color specifications from XcmsCIEuvY
     to XcmsCIEXYZ.

  ·  XcmsCIEuvYToCIETekHVC –  Converts	color  specifications  from  Xcm‐
     sCIEuvY to XcmsCIETekHVC.

  ·  XcmsCIExyYToCIEXYZ	 –  Converts color specifications from XcmsCIExyY
     to XcmsCIEXYZ.

  ·  XcmsTekHVCToCIEuvY – Converts color specifications	 from  XcmsTekHVC
     to XcmsCIEuvY.

  Procedures  provided	and  accessible	 in  Xlib  for conversion between
  CIEXYZ and device–dependent color spaces are:

  ·  XcmsCIEXYZToRGBi – Converts color specifications from XcmsCIEXYZ  to
     XcmsRGBi.

  ·  XcmsRGBToRGBi  –  Converts color specifications from XcmsRGB to Xcm‐
     sRGBi.

  ·  XcmsRGBiToCIEXYZ – Converts color specifications  from  XcmsRGBi  to
     XcmsCIEXYZ.

  ·  XcmsRGBiToRGB  – Converts color specifications from XcmsRGBi to Xcm‐
     sRGB.

Structures
  The XcmsColor structure and XcmsColorFormat type are shown on the Xcms‐
  Color reference page.	 Refer also to the XcmsColorSpace reference page.

See Also
  XcmsColorSpace.

Xlib - Device-independent Color				  XcmsConversionProc()

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