diff options
Diffstat (limited to 'libX11/src/xcms/HVCGcVC.c')
| -rw-r--r-- | libX11/src/xcms/HVCGcVC.c | 524 |
1 files changed, 262 insertions, 262 deletions
diff --git a/libX11/src/xcms/HVCGcVC.c b/libX11/src/xcms/HVCGcVC.c index 9c6b598f8..7ace5f13f 100644 --- a/libX11/src/xcms/HVCGcVC.c +++ b/libX11/src/xcms/HVCGcVC.c @@ -1,262 +1,262 @@ -
-/*
- * 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. TekColor is a
- * trademark of Tektronix, Inc. The term "TekHVC" designates a particular
- * color space that is the subject of U.S. Patent No. 4,985,853 (equivalent
- * foreign patents pending). 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:
- *
- * 1. This copyright, permission, and disclaimer notice is reproduced in
- * all copies of this software and any modification thereof and in
- * supporting documentation;
- * 2. Any color-handling application which displays TekHVC color
- * cooordinates identifies these as TekHVC color coordinates in any
- * interface that displays these coordinates and in any associated
- * documentation;
- * 3. The term "TekHVC" is always used, and is only used, in association
- * with the mathematical derivations of the TekHVC Color Space,
- * including those provided in this file and any equivalent pathways and
- * mathematical derivations, regardless of digital (e.g., floating point
- * or integer) representation.
- *
- * 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
- * TekHVCGcVC.c
- *
- * DESCRIPTION
- * Source for XcmsTekHVCClipVC() gamut
- * compression function.
- */
-
-#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
- * XcmsTekHVCClipVC - Return the closest value and chroma
- *
- * SYNOPSIS
- */
-/* ARGSUSED */
-Status
-XcmsTekHVCClipVC (
- XcmsCCC ccc,
- XcmsColor *pColors_in_out,
- unsigned int nColors,
- unsigned int i,
- Bool *pCompressed)
-/*
- * DESCRIPTION
- * This routine will find the closest value and chroma
- * for a specific hue. The color input is converted to
- * HVC format and returned as CIE XYZ format.
- *
- * Since this routine works with the value 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 hvc_max;
- XcmsRGBi rgb_max;
- int nCount, nMaxCount, nI, nILast;
- XcmsFloat Chroma, Value, bestChroma, bestValue, nT, saveDist, tmpDist;
-
- /*
- * Insure TekHVC installed
- */
- if (XcmsAddColorSpace(&XcmsTekHVCColorSpace) == XcmsFailure) {
- return(XcmsFailure);
- }
-
- /* Use my own CCC */
- memcpy ((char *)&myCCC, (char *)ccc, sizeof(XcmsCCCRec));
- myCCC.clientWhitePt.format = XcmsUndefinedFormat;/* inherit screen white pt */
- 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 &&
- FunctionSetOfCCC(ccc) != (XPointer) &XcmsLinearRGBFunctionSet) {
- /*
- * GRAY !
- */
- _XcmsDIConvertColors(ccc, pColor, &ccc->pPerScrnInfo->screenWhitePt,
- 1, XcmsTekHVCFormat);
- pColor->spec.TekHVC.H = pColor->spec.TekHVC.C = 0.0;
- _XcmsDIConvertColors(ccc, pColor, &ccc->pPerScrnInfo->screenWhitePt,
- 1, XcmsCIEXYZFormat);
- if (pCompressed) {
- *(pCompressed + i) = True;
- }
- return(XcmsSuccess);
- } else {
- /* Convert from CIEXYZ to TekHVC format */
- if (_XcmsDIConvertColors(&myCCC, pColor,
- &myCCC.pPerScrnInfo->screenWhitePt, 1, XcmsTekHVCFormat)
- == XcmsFailure) {
- return(XcmsFailure);
- }
-
- if (!_XcmsTekHVC_CheckModify(pColor)) {
- return (XcmsFailure);
- }
-
- /* Step 1: compute the maximum value and chroma for this hue. */
- /* This copy may be overkill but it preserves the pixel etc. */
- memcpy((char *)&hvc_max, (char *)pColor, sizeof(XcmsColor));
- if (_XcmsTekHVCQueryMaxVCRGB (&myCCC, hvc_max.spec.TekHVC.H, &hvc_max,
- &rgb_max) == XcmsFailure) {
- return (XcmsFailure);
- }
-
- /* Now check and return the appropriate value */
- if (pColor->spec.TekHVC.V == hvc_max.spec.TekHVC.V) {
- /* When the value input is equal to the maximum value */
- /* merely return the chroma for that value. */
- pColor->spec.TekHVC.C = hvc_max.spec.TekHVC.C;
- retval = _XcmsDIConvertColors(&myCCC, pColor,
- &myCCC.pPerScrnInfo->screenWhitePt, 1, XcmsCIEXYZFormat);
- }
-
- if (pColor->spec.TekHVC.V < hvc_max.spec.TekHVC.V) {
- /* return the intersection of the perpindicular line through */
- /* the value and chroma given and the line from 0,0 and hvc_max. */
- Chroma = pColor->spec.TekHVC.C;
- Value = pColor->spec.TekHVC.V;
- pColor->spec.TekHVC.C =
- (Value + (hvc_max.spec.TekHVC.C / hvc_max.spec.TekHVC.V * Chroma)) /
- ((hvc_max.spec.TekHVC.V / hvc_max.spec.TekHVC.C) +
- (hvc_max.spec.TekHVC.C / hvc_max.spec.TekHVC.V));
- if (pColor->spec.TekHVC.C >= hvc_max.spec.TekHVC.C) {
- pColor->spec.TekHVC.C = hvc_max.spec.TekHVC.C;
- pColor->spec.TekHVC.V = hvc_max.spec.TekHVC.V;
- } else {
- pColor->spec.TekHVC.V = pColor->spec.TekHVC.C *
- hvc_max.spec.TekHVC.V / hvc_max.spec.TekHVC.C;
- }
- retval = _XcmsDIConvertColors(&myCCC, pColor,
- &myCCC.pPerScrnInfo->screenWhitePt, 1, XcmsCIEXYZFormat);
-
- if (retval != XcmsFailure && pCompressed != NULL) {
- *(pCompressed + i) = True;
- }
- return (retval);
- }
-
- /* return the closest point on the upper part of the hue leaf. */
- /* must do a bisection here to compute the delta e. */
- nMaxCount = MAXBISECTCOUNT;
- nI = nMaxCount / 2;
- bestValue = Value = pColor->spec.TekHVC.V;
- bestChroma = Chroma = pColor->spec.TekHVC.C;
- saveDist = (XcmsFloat) XCMS_SQRT ((double) (((Chroma - hvc_max.spec.TekHVC.C) *
- (Chroma - hvc_max.spec.TekHVC.C)) +
- ((Value - hvc_max.spec.TekHVC.V) *
- (Value - hvc_max.spec.TekHVC.V))));
- for (nCount = 0; nCount < nMaxCount; nCount++) {
- nT = (XcmsFloat) nI / (XcmsFloat) nMaxCount;
- 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;
- pColor->format = XcmsRGBiFormat;
-
- /* Convert from RGBi to HVC */
- if (_XcmsConvertColorsWithWhitePt(&myCCC, pColor,
- &myCCC.pPerScrnInfo->screenWhitePt, 1, XcmsTekHVCFormat,
- (Bool *) NULL)
- == XcmsFailure) {
- return (XcmsFailure);
- }
- if (!_XcmsTekHVC_CheckModify(pColor)) {
- return (XcmsFailure);
- }
- tmpDist = (XcmsFloat) XCMS_SQRT ((double)
- (((Chroma - pColor->spec.TekHVC.C) *
- (Chroma - pColor->spec.TekHVC.C)) +
- ((Value - pColor->spec.TekHVC.V) *
- (Value - pColor->spec.TekHVC.V))));
- nILast = nI;
- if (tmpDist > saveDist) {
- nI /= 2;
- } else {
- nI = (nMaxCount + nI) / 2;
- saveDist = tmpDist;
- bestValue = pColor->spec.TekHVC.V;
- bestChroma = pColor->spec.TekHVC.C;
- }
- if (nI == nILast || nI == 0) {
- break;
- }
-
- }
-
- if (bestChroma >= hvc_max.spec.TekHVC.C) {
- pColor->spec.TekHVC.C = hvc_max.spec.TekHVC.C;
- pColor->spec.TekHVC.V = hvc_max.spec.TekHVC.V;
- } else {
- pColor->spec.TekHVC.C = bestChroma;
- pColor->spec.TekHVC.V = bestValue;
- }
- if (!_XcmsTekHVC_CheckModify(pColor)) {
- return (XcmsFailure);
- }
- retval = _XcmsDIConvertColors(&myCCC, pColor,
- &myCCC.pPerScrnInfo->screenWhitePt, 1, XcmsCIEXYZFormat);
-
- if (retval != XcmsFailure && pCompressed != NULL) {
- *(pCompressed + i) = True;
- }
- return(retval);
- }
-}
+ +/* + * 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. TekColor is a + * trademark of Tektronix, Inc. The term "TekHVC" designates a particular + * color space that is the subject of U.S. Patent No. 4,985,853 (equivalent + * foreign patents pending). 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: + * + * 1. This copyright, permission, and disclaimer notice is reproduced in + * all copies of this software and any modification thereof and in + * supporting documentation; + * 2. Any color-handling application which displays TekHVC color + * cooordinates identifies these as TekHVC color coordinates in any + * interface that displays these coordinates and in any associated + * documentation; + * 3. The term "TekHVC" is always used, and is only used, in association + * with the mathematical derivations of the TekHVC Color Space, + * including those provided in this file and any equivalent pathways and + * mathematical derivations, regardless of digital (e.g., floating point + * or integer) representation. + * + * 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 + * TekHVCGcVC.c + * + * DESCRIPTION + * Source for XcmsTekHVCClipVC() gamut + * compression function. + */ + +#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 + * XcmsTekHVCClipVC - Return the closest value and chroma + * + * SYNOPSIS + */ +/* ARGSUSED */ +Status +XcmsTekHVCClipVC ( + XcmsCCC ccc, + XcmsColor *pColors_in_out, + unsigned int nColors, + unsigned int i, + Bool *pCompressed) +/* + * DESCRIPTION + * This routine will find the closest value and chroma + * for a specific hue. The color input is converted to + * HVC format and returned as CIE XYZ format. + * + * Since this routine works with the value 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 hvc_max; + XcmsRGBi rgb_max; + int nCount, nMaxCount, nI, nILast; + XcmsFloat Chroma, Value, bestChroma, bestValue, nT, saveDist, tmpDist; + + /* + * Insure TekHVC installed + */ + if (XcmsAddColorSpace(&XcmsTekHVCColorSpace) == XcmsFailure) { + return(XcmsFailure); + } + + /* Use my own CCC */ + memcpy ((char *)&myCCC, (char *)ccc, sizeof(XcmsCCCRec)); + myCCC.clientWhitePt.format = XcmsUndefinedFormat;/* inherit screen white pt */ + 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 && + FunctionSetOfCCC(ccc) != (XPointer) &XcmsLinearRGBFunctionSet) { + /* + * GRAY ! + */ + _XcmsDIConvertColors(ccc, pColor, &ccc->pPerScrnInfo->screenWhitePt, + 1, XcmsTekHVCFormat); + pColor->spec.TekHVC.H = pColor->spec.TekHVC.C = 0.0; + _XcmsDIConvertColors(ccc, pColor, &ccc->pPerScrnInfo->screenWhitePt, + 1, XcmsCIEXYZFormat); + if (pCompressed) { + *(pCompressed + i) = True; + } + return(XcmsSuccess); + } else { + /* Convert from CIEXYZ to TekHVC format */ + if (_XcmsDIConvertColors(&myCCC, pColor, + &myCCC.pPerScrnInfo->screenWhitePt, 1, XcmsTekHVCFormat) + == XcmsFailure) { + return(XcmsFailure); + } + + if (!_XcmsTekHVC_CheckModify(pColor)) { + return (XcmsFailure); + } + + /* Step 1: compute the maximum value and chroma for this hue. */ + /* This copy may be overkill but it preserves the pixel etc. */ + memcpy((char *)&hvc_max, (char *)pColor, sizeof(XcmsColor)); + if (_XcmsTekHVCQueryMaxVCRGB (&myCCC, hvc_max.spec.TekHVC.H, &hvc_max, + &rgb_max) == XcmsFailure) { + return (XcmsFailure); + } + + /* Now check and return the appropriate value */ + if (pColor->spec.TekHVC.V == hvc_max.spec.TekHVC.V) { + /* When the value input is equal to the maximum value */ + /* merely return the chroma for that value. */ + pColor->spec.TekHVC.C = hvc_max.spec.TekHVC.C; + retval = _XcmsDIConvertColors(&myCCC, pColor, + &myCCC.pPerScrnInfo->screenWhitePt, 1, XcmsCIEXYZFormat); + } + + if (pColor->spec.TekHVC.V < hvc_max.spec.TekHVC.V) { + /* return the intersection of the perpindicular line through */ + /* the value and chroma given and the line from 0,0 and hvc_max. */ + Chroma = pColor->spec.TekHVC.C; + Value = pColor->spec.TekHVC.V; + pColor->spec.TekHVC.C = + (Value + (hvc_max.spec.TekHVC.C / hvc_max.spec.TekHVC.V * Chroma)) / + ((hvc_max.spec.TekHVC.V / hvc_max.spec.TekHVC.C) + + (hvc_max.spec.TekHVC.C / hvc_max.spec.TekHVC.V)); + if (pColor->spec.TekHVC.C >= hvc_max.spec.TekHVC.C) { + pColor->spec.TekHVC.C = hvc_max.spec.TekHVC.C; + pColor->spec.TekHVC.V = hvc_max.spec.TekHVC.V; + } else { + pColor->spec.TekHVC.V = pColor->spec.TekHVC.C * + hvc_max.spec.TekHVC.V / hvc_max.spec.TekHVC.C; + } + retval = _XcmsDIConvertColors(&myCCC, pColor, + &myCCC.pPerScrnInfo->screenWhitePt, 1, XcmsCIEXYZFormat); + + if (retval != XcmsFailure && pCompressed != NULL) { + *(pCompressed + i) = True; + } + return (retval); + } + + /* return the closest point on the upper part of the hue leaf. */ + /* must do a bisection here to compute the delta e. */ + nMaxCount = MAXBISECTCOUNT; + nI = nMaxCount / 2; + bestValue = Value = pColor->spec.TekHVC.V; + bestChroma = Chroma = pColor->spec.TekHVC.C; + saveDist = (XcmsFloat) XCMS_SQRT ((double) (((Chroma - hvc_max.spec.TekHVC.C) * + (Chroma - hvc_max.spec.TekHVC.C)) + + ((Value - hvc_max.spec.TekHVC.V) * + (Value - hvc_max.spec.TekHVC.V)))); + for (nCount = 0; nCount < nMaxCount; nCount++) { + nT = (XcmsFloat) nI / (XcmsFloat) nMaxCount; + 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; + pColor->format = XcmsRGBiFormat; + + /* Convert from RGBi to HVC */ + if (_XcmsConvertColorsWithWhitePt(&myCCC, pColor, + &myCCC.pPerScrnInfo->screenWhitePt, 1, XcmsTekHVCFormat, + (Bool *) NULL) + == XcmsFailure) { + return (XcmsFailure); + } + if (!_XcmsTekHVC_CheckModify(pColor)) { + return (XcmsFailure); + } + tmpDist = (XcmsFloat) XCMS_SQRT ((double) + (((Chroma - pColor->spec.TekHVC.C) * + (Chroma - pColor->spec.TekHVC.C)) + + ((Value - pColor->spec.TekHVC.V) * + (Value - pColor->spec.TekHVC.V)))); + nILast = nI; + if (tmpDist > saveDist) { + nI /= 2; + } else { + nI = (nMaxCount + nI) / 2; + saveDist = tmpDist; + bestValue = pColor->spec.TekHVC.V; + bestChroma = pColor->spec.TekHVC.C; + } + if (nI == nILast || nI == 0) { + break; + } + + } + + if (bestChroma >= hvc_max.spec.TekHVC.C) { + pColor->spec.TekHVC.C = hvc_max.spec.TekHVC.C; + pColor->spec.TekHVC.V = hvc_max.spec.TekHVC.V; + } else { + pColor->spec.TekHVC.C = bestChroma; + pColor->spec.TekHVC.V = bestValue; + } + if (!_XcmsTekHVC_CheckModify(pColor)) { + return (XcmsFailure); + } + retval = _XcmsDIConvertColors(&myCCC, pColor, + &myCCC.pPerScrnInfo->screenWhitePt, 1, XcmsCIEXYZFormat); + + if (retval != XcmsFailure && pCompressed != NULL) { + *(pCompressed + i) = True; + } + return(retval); + } +} |