diff options
Diffstat (limited to 'libX11/src/xcms/HVCMxVC.c')
-rw-r--r-- | libX11/src/xcms/HVCMxVC.c | 470 |
1 files changed, 235 insertions, 235 deletions
diff --git a/libX11/src/xcms/HVCMxVC.c b/libX11/src/xcms/HVCMxVC.c index 729ee12bf..c7e087866 100644 --- a/libX11/src/xcms/HVCMxVC.c +++ b/libX11/src/xcms/HVCMxVC.c @@ -1,235 +1,235 @@ -
-/*
- * 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
- * TekHVCMxVC.c
- *
- * DESCRIPTION
- * Source for the XcmsTekHVCQueryMaxVC() gamut boundary
- * querying routine.
- *
- */
-
-#ifdef HAVE_CONFIG_H
-#include <config.h>
-#endif
-#include "Xlibint.h"
-#include "Xcmsint.h"
-#include "Cv.h"
-
-/*
- * DEFINES
- */
-#define MIN(x,y) ((x) > (y) ? (y) : (x))
-#define MIN3(x,y,z) ((x) > (MIN((y), (z))) ? (MIN((y), (z))) : (x))
-#define MAX(x,y) ((x) > (y) ? (x) : (y))
-#define MAX3(x,y,z) ((x) > (MAX((y), (z))) ? (x) : (MAX((y), (z))))
-#define START_V 40.0
-#define START_C 120.0
-
-
-/************************************************************************
- * *
- * API PRIVATE ROUTINES *
- * *
- ************************************************************************/
-
-/*
- * NAME
- * _XcmsTekHVCQueryMaxVCRGB - Compute maximum value/chroma.
- *
- * SYNOPSIS
- */
-Status
-_XcmsTekHVCQueryMaxVCRGB(
- XcmsCCC ccc,
- XcmsFloat hue,
- XcmsColor *pColor_return,
- XcmsRGBi *pRGB_return)
-
-/*
- * DESCRIPTION
- * Return the maximum chroma for a specified hue, and the
- * corresponding value. This is computed by a binary search of
- * all possible chromas. An assumption is made that there are
- * no local maxima. Use the unrounded Max Chroma because
- * the difference check can be small.
- *
- * NOTE: No local CCC is used because this is a private
- * routine and all routines that call it are expected
- * to behave properly, i.e. send a local CCC with
- * no white adjust function and no gamut compression
- * function.
- *
- * This routine only accepts hue as input and outputs
- * HVC's and RGBi's.
- *
- * RETURNS
- * XcmsFailure - Failure
- * XCMS_SUCCUSS - Succeeded
- *
- */
-{
- XcmsFloat nSmall, nLarge;
- XcmsColor tmp;
-
- tmp.format = XcmsTekHVCFormat;
- tmp.spec.TekHVC.H = hue;
- /* Use some unreachable color on the given hue */
- tmp.spec.TekHVC.V = START_V;
- tmp.spec.TekHVC.C = START_C;
-
-
- /*
- * Convert from HVC to RGB
- *
- * Note that the CIEXYZ to RGBi conversion routine must stuff the
- * out of bounds RGBi values in tmp when the ccc->gamutCompProc
- * is NULL.
- */
- if ((_XcmsConvertColorsWithWhitePt(ccc, &tmp,
- &ccc->pPerScrnInfo->screenWhitePt, 1, XcmsRGBiFormat, (Bool *) NULL)
- == XcmsFailure) && tmp.format != XcmsRGBiFormat) {
- return (XcmsFailure);
- }
-
- /* Now pick the smallest RGB */
- nSmall = MIN3(tmp.spec.RGBi.red,
- tmp.spec.RGBi.green,
- tmp.spec.RGBi.blue);
- /* Make the smallest RGB equal to zero */
- tmp.spec.RGBi.red -= nSmall;
- tmp.spec.RGBi.green -= nSmall;
- tmp.spec.RGBi.blue -= nSmall;
-
- /* Now pick the largest RGB */
- nLarge = MAX3(tmp.spec.RGBi.red,
- tmp.spec.RGBi.green,
- tmp.spec.RGBi.blue);
- /* Scale the RGB values based on the largest one */
- tmp.spec.RGBi.red /= nLarge;
- tmp.spec.RGBi.green /= nLarge;
- tmp.spec.RGBi.blue /= nLarge;
- tmp.format = XcmsRGBiFormat;
-
- /* If the calling routine wants RGB value give them the ones used. */
- if (pRGB_return) {
- pRGB_return->red = tmp.spec.RGBi.red;
- pRGB_return->green = tmp.spec.RGBi.green;
- pRGB_return->blue = tmp.spec.RGBi.blue;
- }
-
- /* Convert from RGBi to HVC */
- if (_XcmsConvertColorsWithWhitePt(ccc, &tmp,
- &ccc->pPerScrnInfo->screenWhitePt, 1, XcmsTekHVCFormat, (Bool *) NULL)
- == XcmsFailure) {
- return (XcmsFailure);
- }
-
- /* make sure to return the input hue */
- tmp.spec.TekHVC.H = hue;
- memcpy((char *)pColor_return, (char *)&tmp, sizeof(XcmsColor));
- return (XcmsSuccess);
-}
-
-
-/************************************************************************
- * *
- * PUBLIC ROUTINES *
- * *
- ************************************************************************/
-
-/*
- * NAME
- * XcmsTekHVCQueryMaxVC - Compute maximum value and chroma.
- *
- * SYNOPSIS
- */
-Status
-XcmsTekHVCQueryMaxVC (
- XcmsCCC ccc,
- XcmsFloat hue,
- XcmsColor *pColor_return)
-
-/*
- * DESCRIPTION
- * Return the maximum chroma for the specified hue, and the
- * corresponding value.
- *
- * ASSUMPTIONS
- * This routine assumes that the white point associated with
- * the color specification is the Screen White Point. The
- * Screen White Point will also be associated with the
- * returned color specification.
- *
- * RETURNS
- * XcmsFailure - Failure
- * XcmsSuccess - Succeeded
- *
- */
-{
- XcmsCCCRec myCCC;
-
- /*
- * Check Arguments
- */
- if (ccc == NULL || pColor_return == NULL) {
- return(XcmsFailure);
- }
-
- /*
- * Insure TekHVC installed
- */
- if (XcmsAddColorSpace(&XcmsTekHVCColorSpace) == XcmsFailure) {
- return(XcmsFailure);
- }
-
- /* Use my own CCC */
- memcpy ((char *)&myCCC, (char *)ccc, sizeof(XcmsCCCRec));
- myCCC.clientWhitePt.format = XcmsUndefinedFormat;
- myCCC.gamutCompProc = (XcmsCompressionProc)NULL;
-
- while (hue < 0.0) {
- hue += 360.0;
- }
- while (hue >= 360.0) {
- hue -= 360.0;
- }
-
- return(_XcmsTekHVCQueryMaxVCRGB (&myCCC, hue, pColor_return,
- (XcmsRGBi *)NULL));
-}
+ +/* + * 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 + * TekHVCMxVC.c + * + * DESCRIPTION + * Source for the XcmsTekHVCQueryMaxVC() gamut boundary + * querying routine. + * + */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif +#include "Xlibint.h" +#include "Xcmsint.h" +#include "Cv.h" + +/* + * DEFINES + */ +#define MIN(x,y) ((x) > (y) ? (y) : (x)) +#define MIN3(x,y,z) ((x) > (MIN((y), (z))) ? (MIN((y), (z))) : (x)) +#define MAX(x,y) ((x) > (y) ? (x) : (y)) +#define MAX3(x,y,z) ((x) > (MAX((y), (z))) ? (x) : (MAX((y), (z)))) +#define START_V 40.0 +#define START_C 120.0 + + +/************************************************************************ + * * + * API PRIVATE ROUTINES * + * * + ************************************************************************/ + +/* + * NAME + * _XcmsTekHVCQueryMaxVCRGB - Compute maximum value/chroma. + * + * SYNOPSIS + */ +Status +_XcmsTekHVCQueryMaxVCRGB( + XcmsCCC ccc, + XcmsFloat hue, + XcmsColor *pColor_return, + XcmsRGBi *pRGB_return) + +/* + * DESCRIPTION + * Return the maximum chroma for a specified hue, and the + * corresponding value. This is computed by a binary search of + * all possible chromas. An assumption is made that there are + * no local maxima. Use the unrounded Max Chroma because + * the difference check can be small. + * + * NOTE: No local CCC is used because this is a private + * routine and all routines that call it are expected + * to behave properly, i.e. send a local CCC with + * no white adjust function and no gamut compression + * function. + * + * This routine only accepts hue as input and outputs + * HVC's and RGBi's. + * + * RETURNS + * XcmsFailure - Failure + * XCMS_SUCCUSS - Succeeded + * + */ +{ + XcmsFloat nSmall, nLarge; + XcmsColor tmp; + + tmp.format = XcmsTekHVCFormat; + tmp.spec.TekHVC.H = hue; + /* Use some unreachable color on the given hue */ + tmp.spec.TekHVC.V = START_V; + tmp.spec.TekHVC.C = START_C; + + + /* + * Convert from HVC to RGB + * + * Note that the CIEXYZ to RGBi conversion routine must stuff the + * out of bounds RGBi values in tmp when the ccc->gamutCompProc + * is NULL. + */ + if ((_XcmsConvertColorsWithWhitePt(ccc, &tmp, + &ccc->pPerScrnInfo->screenWhitePt, 1, XcmsRGBiFormat, (Bool *) NULL) + == XcmsFailure) && tmp.format != XcmsRGBiFormat) { + return (XcmsFailure); + } + + /* Now pick the smallest RGB */ + nSmall = MIN3(tmp.spec.RGBi.red, + tmp.spec.RGBi.green, + tmp.spec.RGBi.blue); + /* Make the smallest RGB equal to zero */ + tmp.spec.RGBi.red -= nSmall; + tmp.spec.RGBi.green -= nSmall; + tmp.spec.RGBi.blue -= nSmall; + + /* Now pick the largest RGB */ + nLarge = MAX3(tmp.spec.RGBi.red, + tmp.spec.RGBi.green, + tmp.spec.RGBi.blue); + /* Scale the RGB values based on the largest one */ + tmp.spec.RGBi.red /= nLarge; + tmp.spec.RGBi.green /= nLarge; + tmp.spec.RGBi.blue /= nLarge; + tmp.format = XcmsRGBiFormat; + + /* If the calling routine wants RGB value give them the ones used. */ + if (pRGB_return) { + pRGB_return->red = tmp.spec.RGBi.red; + pRGB_return->green = tmp.spec.RGBi.green; + pRGB_return->blue = tmp.spec.RGBi.blue; + } + + /* Convert from RGBi to HVC */ + if (_XcmsConvertColorsWithWhitePt(ccc, &tmp, + &ccc->pPerScrnInfo->screenWhitePt, 1, XcmsTekHVCFormat, (Bool *) NULL) + == XcmsFailure) { + return (XcmsFailure); + } + + /* make sure to return the input hue */ + tmp.spec.TekHVC.H = hue; + memcpy((char *)pColor_return, (char *)&tmp, sizeof(XcmsColor)); + return (XcmsSuccess); +} + + +/************************************************************************ + * * + * PUBLIC ROUTINES * + * * + ************************************************************************/ + +/* + * NAME + * XcmsTekHVCQueryMaxVC - Compute maximum value and chroma. + * + * SYNOPSIS + */ +Status +XcmsTekHVCQueryMaxVC ( + XcmsCCC ccc, + XcmsFloat hue, + XcmsColor *pColor_return) + +/* + * DESCRIPTION + * Return the maximum chroma for the specified hue, and the + * corresponding value. + * + * ASSUMPTIONS + * This routine assumes that the white point associated with + * the color specification is the Screen White Point. The + * Screen White Point will also be associated with the + * returned color specification. + * + * RETURNS + * XcmsFailure - Failure + * XcmsSuccess - Succeeded + * + */ +{ + XcmsCCCRec myCCC; + + /* + * Check Arguments + */ + if (ccc == NULL || pColor_return == NULL) { + return(XcmsFailure); + } + + /* + * Insure TekHVC installed + */ + if (XcmsAddColorSpace(&XcmsTekHVCColorSpace) == XcmsFailure) { + return(XcmsFailure); + } + + /* Use my own CCC */ + memcpy ((char *)&myCCC, (char *)ccc, sizeof(XcmsCCCRec)); + myCCC.clientWhitePt.format = XcmsUndefinedFormat; + myCCC.gamutCompProc = (XcmsCompressionProc)NULL; + + while (hue < 0.0) { + hue += 360.0; + } + while (hue >= 360.0) { + hue -= 360.0; + } + + return(_XcmsTekHVCQueryMaxVCRGB (&myCCC, hue, pColor_return, + (XcmsRGBi *)NULL)); +} |