sync code with last improvements from OpenBSD
This commit is contained in:
commit
88965415ff
GPG key ID:
F42C07F07E2E35B7
26235 changed files with 29195616 additions and 0 deletions
243
lib/libX11/src/xcms/HVCMxC.c
Normal file
243
lib/libX11/src/xcms/HVCMxC.c
Normal file
|
|
@ -0,0 +1,243 @@
|
|||
|
||||
/*
|
||||
* 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
|
||||
* TekHVCMxC.c
|
||||
*
|
||||
* DESCRIPTION
|
||||
* Source for the XcmsTekHVCQueryMaxC() gamut boundary
|
||||
* querying routine.
|
||||
*
|
||||
*/
|
||||
|
||||
#ifdef HAVE_CONFIG_H
|
||||
#include <config.h>
|
||||
#endif
|
||||
#include "Xlibint.h"
|
||||
#include "Xcmsint.h"
|
||||
#include <math.h>
|
||||
#include "Cv.h"
|
||||
|
||||
/*
|
||||
* DEFINES
|
||||
*/
|
||||
#define MAXBISECTCOUNT 100
|
||||
#define EPS 0.001
|
||||
|
||||
|
||||
/************************************************************************
|
||||
* *
|
||||
* PUBLIC ROUTINES *
|
||||
* *
|
||||
************************************************************************/
|
||||
|
||||
/*
|
||||
* NAME
|
||||
* XcmsTekHVCQueryMaxC - Compute the maximum chroma for a hue and value
|
||||
*
|
||||
* SYNOPSIS
|
||||
*/
|
||||
Status
|
||||
XcmsTekHVCQueryMaxC(
|
||||
XcmsCCC ccc,
|
||||
XcmsFloat hue,
|
||||
XcmsFloat value,
|
||||
XcmsColor *pColor_return)
|
||||
/*
|
||||
* DESCRIPTION
|
||||
* Return the maximum chroma for a specific hue and value.
|
||||
* The returned format is in XcmsTekHVCFormat.
|
||||
*
|
||||
*
|
||||
* 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;
|
||||
XcmsColor tmp;
|
||||
XcmsColor max_vc;
|
||||
XcmsRGBi rgb_saved;
|
||||
int nCount, nMaxCount;
|
||||
XcmsFloat nValue, savedValue, lastValue, lastChroma, prevValue;
|
||||
XcmsFloat maxDist, nT, rFactor;
|
||||
XcmsFloat ftmp1, ftmp2;
|
||||
|
||||
/*
|
||||
* 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; /* inherit screen white Pt */
|
||||
myCCC.gamutCompProc = (XcmsCompressionProc)NULL;/* no gamut comp func */
|
||||
|
||||
tmp.spec.TekHVC.H = hue;
|
||||
tmp.spec.TekHVC.V = value;
|
||||
tmp.spec.TekHVC.C = 100.0;
|
||||
tmp.pixel = pColor_return->pixel;
|
||||
tmp.format = XcmsTekHVCFormat;
|
||||
|
||||
/* check to make sure we have a valid TekHVC number */
|
||||
if (!_XcmsTekHVC_CheckModify(&tmp)) {
|
||||
return(XcmsFailure);
|
||||
}
|
||||
|
||||
/* Step 1: compute the maximum value and chroma for this hue. */
|
||||
memcpy((char *)&max_vc, (char *)&tmp, sizeof(XcmsColor));
|
||||
if (_XcmsTekHVCQueryMaxVCRGB(&myCCC, hue, &max_vc, &rgb_saved)
|
||||
== XcmsFailure) {
|
||||
return(XcmsFailure);
|
||||
}
|
||||
|
||||
/* Step 2: If the value is less than the value for the maximum */
|
||||
/* value, chroma point then the chroma is on the line */
|
||||
/* from max_vc to 0,0. */
|
||||
if (value <= max_vc.spec.TekHVC.V) {
|
||||
tmp.spec.TekHVC.C = value
|
||||
* max_vc.spec.TekHVC.C / max_vc.spec.TekHVC.V;
|
||||
if (_XcmsTekHVC_CheckModify (&tmp)) {
|
||||
memcpy((char *)pColor_return, (char *)&tmp, sizeof(XcmsColor));
|
||||
return(XcmsSuccess);
|
||||
} else {
|
||||
return(XcmsFailure);
|
||||
}
|
||||
} else {
|
||||
/* must do a bisection here to compute the maximum chroma */
|
||||
/* save the structure input so that any elements that */
|
||||
/* are not touched are recopied later in the routine. */
|
||||
nValue = savedValue = value;
|
||||
lastChroma = -1.0;
|
||||
lastValue = -1.0;
|
||||
nMaxCount = MAXBISECTCOUNT;
|
||||
maxDist = 100.0 - max_vc.spec.TekHVC.V;
|
||||
rFactor = 1.0;
|
||||
|
||||
for (nCount = 0; nCount < nMaxCount; nCount++) {
|
||||
prevValue = lastValue;
|
||||
lastValue = tmp.spec.TekHVC.V;
|
||||
lastChroma = tmp.spec.TekHVC.C;
|
||||
nT = (nValue - max_vc.spec.TekHVC.V) / maxDist * rFactor;
|
||||
tmp.spec.RGBi.red = rgb_saved.red * (1.0 - nT) + nT;
|
||||
tmp.spec.RGBi.green = rgb_saved.green * (1.0 - nT) + nT;
|
||||
tmp.spec.RGBi.blue = rgb_saved.blue * (1.0 - nT) + nT;
|
||||
tmp.format = XcmsRGBiFormat;
|
||||
|
||||
/* convert from RGB to HVC */
|
||||
if (_XcmsConvertColorsWithWhitePt(&myCCC, &tmp,
|
||||
&myCCC.pPerScrnInfo->screenWhitePt, 1, XcmsTekHVCFormat,
|
||||
(Bool *) NULL) == XcmsFailure) {
|
||||
return(XcmsFailure);
|
||||
}
|
||||
|
||||
/* Now check the return against what is expected */
|
||||
if (tmp.spec.TekHVC.V <= savedValue + EPS &&
|
||||
tmp.spec.TekHVC.V >= savedValue - EPS) {
|
||||
/* make sure to return the input hue */
|
||||
tmp.spec.TekHVC.H = hue;
|
||||
if (_XcmsTekHVC_CheckModify (&tmp)) {
|
||||
memcpy((char *)pColor_return, (char *)&tmp, sizeof(XcmsColor));
|
||||
return(XcmsSuccess);
|
||||
} else {
|
||||
return(XcmsFailure);
|
||||
}
|
||||
}
|
||||
nValue += savedValue - tmp.spec.TekHVC.V;
|
||||
if (nValue < max_vc.spec.TekHVC.V) {
|
||||
nValue = max_vc.spec.TekHVC.V;
|
||||
rFactor *= 0.5; /* selective relaxation employed */
|
||||
} else if (nValue > 100.0) {
|
||||
/* make sure to return the input hue */
|
||||
tmp.spec.TekHVC.H = hue;
|
||||
/* avoid using fabs */
|
||||
ftmp1 = lastValue - savedValue;
|
||||
if (ftmp1 < 0.0)
|
||||
ftmp1 = -ftmp1;
|
||||
ftmp2 = tmp.spec.TekHVC.V - savedValue;
|
||||
if (ftmp2 < 0.0)
|
||||
ftmp2 = -ftmp2;
|
||||
if (ftmp1 < ftmp2) {
|
||||
tmp.spec.TekHVC.V = lastValue;
|
||||
tmp.spec.TekHVC.C = lastChroma;
|
||||
}
|
||||
if (_XcmsTekHVC_CheckModify (&tmp)) {
|
||||
memcpy((char *)pColor_return, (char *)&tmp, sizeof(XcmsColor));
|
||||
return(XcmsSuccess);
|
||||
} else {
|
||||
return(XcmsFailure);
|
||||
}
|
||||
} else if (tmp.spec.TekHVC.V <= prevValue + EPS &&
|
||||
tmp.spec.TekHVC.V >= prevValue - EPS) {
|
||||
rFactor *= 0.5; /* selective relaxation employed */
|
||||
}
|
||||
}
|
||||
if (nCount >= nMaxCount) {
|
||||
/* avoid using fabs */
|
||||
ftmp1 = lastValue - savedValue;
|
||||
if (ftmp1 < 0.0)
|
||||
ftmp1 = -ftmp1;
|
||||
ftmp2 = tmp.spec.TekHVC.V - savedValue;
|
||||
if (ftmp2 < 0.0)
|
||||
ftmp2 = -ftmp2;
|
||||
if (ftmp1 < ftmp2) {
|
||||
tmp.spec.TekHVC.V = lastValue;
|
||||
tmp.spec.TekHVC.C = lastChroma;
|
||||
}
|
||||
}
|
||||
}
|
||||
/* make sure to return the input hue */
|
||||
tmp.spec.TekHVC.H = hue;
|
||||
memcpy((char *)pColor_return, (char *)&tmp, sizeof(XcmsColor));
|
||||
return(XcmsSuccess);
|
||||
}
|
||||
Loading…
Add table
Add a link
Reference in a new issue