aboutsummaryrefslogtreecommitdiff
path: root/libX11/src/xcms/LuvGcLC.c
diff options
context:
space:
mode:
authormarha <marha@users.sourceforge.net>2009-06-28 22:07:26 +0000
committermarha <marha@users.sourceforge.net>2009-06-28 22:07:26 +0000
commit3562e78743202e43aec8727005182a2558117eca (patch)
tree8f9113a77d12470c5c851a2a8e4cb02e89df7d43 /libX11/src/xcms/LuvGcLC.c
downloadvcxsrv-3562e78743202e43aec8727005182a2558117eca.tar.gz
vcxsrv-3562e78743202e43aec8727005182a2558117eca.tar.bz2
vcxsrv-3562e78743202e43aec8727005182a2558117eca.zip
Checked in the following released items:
xkeyboard-config-1.4.tar.gz ttf-bitstream-vera-1.10.tar.gz font-alias-1.0.1.tar.gz font-sun-misc-1.0.0.tar.gz font-sun-misc-1.0.0.tar.gz font-sony-misc-1.0.0.tar.gz font-schumacher-misc-1.0.0.tar.gz font-mutt-misc-1.0.0.tar.gz font-misc-misc-1.0.0.tar.gz font-misc-meltho-1.0.0.tar.gz font-micro-misc-1.0.0.tar.gz font-jis-misc-1.0.0.tar.gz font-isas-misc-1.0.0.tar.gz font-dec-misc-1.0.0.tar.gz font-daewoo-misc-1.0.0.tar.gz font-cursor-misc-1.0.0.tar.gz font-arabic-misc-1.0.0.tar.gz font-winitzki-cyrillic-1.0.0.tar.gz font-misc-cyrillic-1.0.0.tar.gz font-cronyx-cyrillic-1.0.0.tar.gz font-screen-cyrillic-1.0.1.tar.gz font-xfree86-type1-1.0.1.tar.gz font-adobe-utopia-type1-1.0.1.tar.gz font-ibm-type1-1.0.0.tar.gz font-bitstream-type1-1.0.0.tar.gz font-bitstream-speedo-1.0.0.tar.gz font-bh-ttf-1.0.0.tar.gz font-bh-type1-1.0.0.tar.gz font-bitstream-100dpi-1.0.0.tar.gz font-bh-lucidatypewriter-100dpi-1.0.0.tar.gz font-bh-100dpi-1.0.0.tar.gz font-adobe-utopia-100dpi-1.0.1.tar.gz font-adobe-100dpi-1.0.0.tar.gz font-util-1.0.1.tar.gz font-bitstream-75dpi-1.0.0.tar.gz font-bh-lucidatypewriter-75dpi-1.0.0.tar.gz font-adobe-utopia-75dpi-1.0.1.tar.gz font-bh-75dpi-1.0.0.tar.gz bdftopcf-1.0.1.tar.gz font-adobe-75dpi-1.0.0.tar.gz mkfontscale-1.0.6.tar.gz openssl-0.9.8k.tar.gz bigreqsproto-1.0.2.tar.gz xtrans-1.2.2.tar.gz resourceproto-1.0.2.tar.gz inputproto-1.4.4.tar.gz compositeproto-0.4.tar.gz damageproto-1.1.0.tar.gz zlib-1.2.3.tar.gz xkbcomp-1.0.5.tar.gz freetype-2.3.9.tar.gz pthreads-w32-2-8-0-release.tar.gz pixman-0.12.0.tar.gz kbproto-1.0.3.tar.gz evieext-1.0.2.tar.gz fixesproto-4.0.tar.gz recordproto-1.13.2.tar.gz randrproto-1.2.2.tar.gz scrnsaverproto-1.1.0.tar.gz renderproto-0.9.3.tar.gz xcmiscproto-1.1.2.tar.gz fontsproto-2.0.2.tar.gz xextproto-7.0.3.tar.gz xproto-7.0.14.tar.gz libXdmcp-1.0.2.tar.gz libxkbfile-1.0.5.tar.gz libfontenc-1.0.4.tar.gz libXfont-1.3.4.tar.gz libX11-1.1.5.tar.gz libXau-1.0.4.tar.gz libxcb-1.1.tar.gz xorg-server-1.5.3.tar.gz
Diffstat (limited to 'libX11/src/xcms/LuvGcLC.c')
-rw-r--r--libX11/src/xcms/LuvGcLC.c225
1 files changed, 225 insertions, 0 deletions
diff --git a/libX11/src/xcms/LuvGcLC.c b/libX11/src/xcms/LuvGcLC.c
new file mode 100644
index 000000000..f2eab371e
--- /dev/null
+++ b/libX11/src/xcms/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 <config.h>
+#endif
+#include "Xlibint.h"
+#include "Xcmsint.h"
+#include <math.h>
+#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 (
+ 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);
+}