From f4092abdf94af6a99aff944d6264bc1284e8bdd4 Mon Sep 17 00:00:00 2001 From: Reinhard Tartler Date: Mon, 10 Oct 2011 17:43:39 +0200 Subject: Imported nx-X11-3.1.0-1.tar.gz Summary: Imported nx-X11-3.1.0-1.tar.gz Keywords: Imported nx-X11-3.1.0-1.tar.gz into Git repository --- nx-X11/lib/X11/LuvGcLC.c | 225 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 225 insertions(+) create mode 100644 nx-X11/lib/X11/LuvGcLC.c (limited to 'nx-X11/lib/X11/LuvGcLC.c') diff --git a/nx-X11/lib/X11/LuvGcLC.c b/nx-X11/lib/X11/LuvGcLC.c new file mode 100644 index 000000000..a3cc0f68b --- /dev/null +++ b/nx-X11/lib/X11/LuvGcLC.c @@ -0,0 +1,225 @@ +/* $Xorg: LuvGcLC.c,v 1.3 2000/08/17 19:44:41 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 + * CIELuvGcLC.c + * + * DESCRIPTION + * Source for XcmsCIELuvClipLuv() gamut + * compression function. + */ +/* $XFree86: xc/lib/X11/LuvGcLC.c,v 1.3 2001/01/17 19:41:39 dawes Exp $ */ + +#ifdef HAVE_CONFIG_H +#include +#endif +#include "Xlibint.h" +#include "Xcmsint.h" +#include +#include "Cv.h" + +/* + * INTERNALS + * Internal defines that need NOT be exported to any package or + * program using this package. + */ +#define MAXBISECTCOUNT 100 + + +/************************************************************************ + * * + * PUBLIC ROUTINES * + * * + ************************************************************************/ + +/* + * NAME + * XcmsCIELuvClipLuv - Return the closest L* and chroma + * + * SYNOPSIS + */ +/* ARGSUSED */ +Status +XcmsCIELuvClipLuv (ccc, pColors_in_out, nColors, i, pCompressed) + XcmsCCC ccc; + XcmsColor *pColors_in_out; + unsigned int nColors; + unsigned int i; + Bool *pCompressed; +/* + * DESCRIPTION + * This routine will find the closest L* and chroma + * for a specific hue. The color input is converted to + * CIE L*u*v* format and returned as CIE XYZ format. + * + * 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; + XcmsCCCRec myCCC; + XcmsColor *pColor; + XcmsColor Luv_max; + XcmsFloat hue, chroma, maxChroma; + XcmsFloat Chroma, bestChroma, Lstar, maxLstar, saveLstar; + XcmsFloat bestLstar, bestustar, bestvstar; + XcmsFloat nT, saveDist, tmpDist; + XcmsRGBi rgb_max; + int nCount, nMaxCount, nI, nILast; + + /* Use my own CCC */ + memcpy ((char *)&myCCC, (char *)ccc, sizeof(XcmsCCCRec)); + myCCC.clientWhitePt.format = XcmsUndefinedFormat;/* inherit screen white */ + myCCC.gamutCompProc = (XcmsCompressionProc)NULL;/* no gamut compression func */ + + /* + * 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 < StaticColor) { + /* + * GRAY ! + */ + _XcmsDIConvertColors(ccc, pColor, ScreenWhitePointOfCCC(ccc), + 1, XcmsCIELuvFormat); + _XcmsDIConvertColors(ccc, pColor, ScreenWhitePointOfCCC(ccc), + 1, XcmsCIEXYZFormat); + if (pCompressed) { + *(pCompressed + i) = True; + } + return(XcmsSuccess); + } + + /* Convert from CIEXYZ to CIELuv format */ + if (_XcmsDIConvertColors(&myCCC, pColor, + ScreenWhitePointOfCCC(&myCCC), 1, XcmsCIELuvFormat) + == XcmsFailure) { + return(XcmsFailure); + } + + /* Step 1: compute the maximum L* and chroma for this hue. */ + /* This copy may be overkill but it preserves the pixel etc. */ + saveLstar = pColor->spec.CIELuv.L_star; + hue = XCMS_CIELUV_PMETRIC_HUE(pColor->spec.CIELuv.u_star, + pColor->spec.CIELuv.v_star); + chroma = XCMS_CIELUV_PMETRIC_CHROMA(pColor->spec.CIELuv.u_star, + pColor->spec.CIELuv.v_star); + memcpy((char *)&Luv_max, (char *)pColor, sizeof(XcmsColor)); + if (_XcmsCIELuvQueryMaxLCRGB (&myCCC, hue, &Luv_max, &rgb_max) + == XcmsFailure) { + return (XcmsFailure); + } + maxLstar = Luv_max.spec.CIELuv.L_star; + + /* Now check and return the appropriate L* */ + if (saveLstar == maxLstar) { + /* When the L* input is equal to the maximum L* */ + /* merely return the maximum Luv point. */ + memcpy((char *)pColor, (char *)&Luv_max, sizeof(XcmsColor)); + retval = _XcmsDIConvertColors(&myCCC, pColor, + ScreenWhitePointOfCCC(&myCCC), 1, XcmsCIEXYZFormat); + } else { + /* return the closest point on the hue leaf. */ + /* must do a bisection here to compute the delta e. */ + maxChroma = XCMS_CIELUV_PMETRIC_CHROMA(Luv_max.spec.CIELuv.u_star, + Luv_max.spec.CIELuv.v_star); + nMaxCount = MAXBISECTCOUNT; + nI = nMaxCount / 2; + bestLstar = Lstar = pColor->spec.CIELuv.L_star; + bestustar = pColor->spec.CIELuv.u_star; + bestvstar = pColor->spec.CIELuv.v_star; + bestChroma = Chroma = chroma; + saveDist = XCMS_SQRT(((Chroma - maxChroma) * (Chroma - maxChroma)) + + ((Lstar - maxLstar) * (Lstar - maxLstar))); + for (nCount = 0; nCount < nMaxCount; nCount++) { + nT = (XcmsFloat) nI / (XcmsFloat) nMaxCount; + if (saveLstar > maxLstar) { + pColor->spec.RGBi.red = rgb_max.red * (1.0 - nT) + nT; + pColor->spec.RGBi.green = rgb_max.green * (1.0 - nT) + nT; + pColor->spec.RGBi.blue = rgb_max.blue * (1.0 - nT) + nT; + } else { + pColor->spec.RGBi.red = rgb_max.red - (rgb_max.red * nT); + pColor->spec.RGBi.green = rgb_max.green - (rgb_max.green * nT); + pColor->spec.RGBi.blue = rgb_max.blue - (rgb_max.blue * nT); + } + pColor->format = XcmsRGBiFormat; + + /* Convert from RGBi to CIE Luv */ + if (_XcmsConvertColorsWithWhitePt(&myCCC, pColor, + ScreenWhitePointOfCCC(&myCCC), 1, XcmsCIELuvFormat, + (Bool *) NULL) == XcmsFailure) { + return (XcmsFailure); + } + chroma = XCMS_CIELUV_PMETRIC_CHROMA(pColor->spec.CIELuv.u_star, + pColor->spec.CIELuv.v_star); + tmpDist = XCMS_SQRT(((Chroma - chroma) * (Chroma - chroma)) + + ((Lstar - pColor->spec.CIELuv.L_star) * + (Lstar - pColor->spec.CIELuv.L_star))); + nILast = nI; + if (tmpDist > saveDist) { + nI /= 2; + } else { + nI = (nMaxCount + nI) / 2; + saveDist = tmpDist; + bestLstar = pColor->spec.CIELuv.L_star; + bestustar = pColor->spec.CIELuv.u_star; + bestvstar = pColor->spec.CIELuv.v_star; + bestChroma = chroma; + } + if (nI == nILast || nI == 0) { + break; + } + } + if (bestChroma >= maxChroma) { + pColor->spec.CIELuv.L_star = maxLstar; + pColor->spec.CIELuv.u_star = Luv_max.spec.CIELuv.u_star; + pColor->spec.CIELuv.v_star = Luv_max.spec.CIELuv.v_star; + } else { + pColor->spec.CIELuv.L_star = bestLstar; + pColor->spec.CIELuv.u_star = bestustar; + pColor->spec.CIELuv.v_star = bestvstar; + } + retval = _XcmsDIConvertColors(&myCCC, pColor, + ScreenWhitePointOfCCC(&myCCC), 1, XcmsCIEXYZFormat); + + if (retval != XcmsFailure && pCompressed != NULL) { + *(pCompressed + i) = True; + } + } + return(retval); +} -- cgit v1.2.3