mirror of
https://github.com/Stichting-MINIX-Research-Foundation/xsrc.git
synced 2025-09-10 21:28:49 -04:00
127 lines
3.9 KiB
C
127 lines
3.9 KiB
C
/* $Xorg: LabGcC.c,v 1.3 2000/08/17 19:44:39 cpqbld Exp $ */
|
||
|
||
/*
|
||
* Code and supporting documentation (c) Copyright 1990 1991 Tektronix, Inc.
|
||
* All Rights Reserved
|
||
*
|
||
* This file is a component of an X Window System-specific implementation
|
||
* of XCMS based on the TekColor Color Management System. Permission is
|
||
* hereby granted to use, copy, modify, sell, and otherwise distribute this
|
||
* software and its documentation for any purpose and without fee, provided
|
||
* that this copyright, permission, and disclaimer notice is reproduced in
|
||
* all copies of this software and in supporting documentation. TekColor
|
||
* is a trademark of Tektronix, Inc.
|
||
*
|
||
* Tektronix makes no representation about the suitability of this software
|
||
* for any purpose. It is provided "as is" and with all faults.
|
||
*
|
||
* TEKTRONIX DISCLAIMS ALL WARRANTIES APPLICABLE TO THIS SOFTWARE,
|
||
* INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
|
||
* PARTICULAR PURPOSE. IN NO EVENT SHALL TEKTRONIX BE LIABLE FOR ANY
|
||
* SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
|
||
* RESULTING FROM LOSS OF USE, DATA, OR PROFITS, WHETHER IN AN ACTION OF
|
||
* CONTRACT, NEGLIGENCE, OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
|
||
* CONNECTION WITH THE USE OR THE PERFORMANCE OF THIS SOFTWARE.
|
||
*
|
||
* NAME
|
||
* CIELabGcC.c
|
||
*
|
||
* DESCRIPTION
|
||
* Source for XcmsCIELabClipuv() gamut compression routine.
|
||
*
|
||
*/
|
||
/* $XFree86: xc/lib/X11/LabGcC.c,v 1.4 2003/04/13 19:22:16 dawes Exp $ */
|
||
|
||
#include "Xlibint.h"
|
||
#include "Xcmsint.h"
|
||
#include "Cv.h"
|
||
|
||
|
||
/************************************************************************
|
||
* *
|
||
* PUBLIC ROUTINES *
|
||
* *
|
||
************************************************************************/
|
||
|
||
/*
|
||
* NAME
|
||
* XcmsCIELabClipab - Reduce the chroma for a hue and L*
|
||
*
|
||
* SYNOPSIS
|
||
*/
|
||
/* ARGSUSED */
|
||
Status
|
||
XcmsCIELabClipab (ccc, pColors_in_out, nColors, i, pCompressed)
|
||
XcmsCCC ccc;
|
||
XcmsColor *pColors_in_out;
|
||
unsigned int nColors;
|
||
unsigned int i;
|
||
Bool *pCompressed;
|
||
/*
|
||
* DESCRIPTION
|
||
* Reduce the Chroma for a specific hue and chroma to
|
||
* to bring the given color into the gamut of the
|
||
* specified device. As required of gamut compression
|
||
* functions, this routine returns pColor_in_out
|
||
* in XcmsCIEXYZFormat on successful completion.
|
||
*
|
||
* Since this routine works with the L* within
|
||
* pColor_in_out intermediate results may be returned
|
||
* even though it may be invalid.
|
||
*
|
||
* RETURNS
|
||
* XcmsFailure - Failure
|
||
* XcmsSuccess - Succeeded
|
||
*
|
||
*/
|
||
{
|
||
Status retval;
|
||
XcmsColor *pColor;
|
||
|
||
/*
|
||
* Color specification passed as input can be assumed to:
|
||
* 1. Be in XcmsCIEXYZFormat
|
||
* 2. Already be white point adjusted for the Screen White Point.
|
||
* This means that the white point now associated with this
|
||
* color spec is the Screen White Point (even if the
|
||
* ccc->clientWhitePt differs).
|
||
*/
|
||
|
||
pColor = pColors_in_out + i;
|
||
|
||
if (ccc->visual->class < PseudoColor) {
|
||
/*
|
||
* GRAY !
|
||
*/
|
||
_XcmsDIConvertColors(ccc, pColor, ScreenWhitePointOfCCC(ccc),
|
||
1, XcmsCIELabFormat);
|
||
_XcmsDIConvertColors(ccc, pColor, ScreenWhitePointOfCCC(ccc),
|
||
1, XcmsCIEXYZFormat);
|
||
if (pCompressed) {
|
||
*(pCompressed + i) = True;
|
||
}
|
||
return(XcmsSuccess);
|
||
} else {
|
||
if (pColor->format != XcmsCIELabFormat) {
|
||
if (_XcmsDIConvertColors(ccc, pColor,
|
||
&ccc->pPerScrnInfo->screenWhitePt, 1, XcmsCIELabFormat)
|
||
== XcmsFailure) {
|
||
return(XcmsFailure);
|
||
}
|
||
}
|
||
if (XcmsCIELabQueryMaxC(ccc,
|
||
degrees(XCMS_CIELAB_PMETRIC_HUE(pColor->spec.CIELab.a_star,
|
||
pColor->spec.CIELab.b_star)),
|
||
pColor->spec.CIELab.L_star,
|
||
pColor) == XcmsFailure) {
|
||
return(XcmsFailure);
|
||
}
|
||
retval = _XcmsDIConvertColors(ccc, pColor,
|
||
&ccc->pPerScrnInfo->screenWhitePt, 1, XcmsCIEXYZFormat);
|
||
if (retval != XcmsFailure && pCompressed != NULL) {
|
||
*(pCompressed + i) = True;
|
||
}
|
||
return(retval);
|
||
}
|
||
}
|