Imported nx-X11-3.1.0-1.tar.gznx-X11/3.1.0-1

Summary: Imported nx-X11-3.1.0-1.tar.gz
Keywords:

Imported nx-X11-3.1.0-1.tar.gz
into Git repository

1 files changed, 220 insertions, 0 deletions

diff --git a/nx-X11/lib/X11/LabMxLC.c b/nx-X11/lib/X11/LabMxLC.c
new file mode 100644
index 000000000..d4efba34c
--- /dev/null
+++ b/nx-X11/lib/X11/LabMxLC.c
@@ -0,0 +1,220 @@
+/* $Xorg: LabMxLC.c,v 1.3 2000/08/17 19:44:40 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
+ *		CIELabMxVC.c
+ *
+ *	DESCRIPTION
+ *		Source for the XcmsCIELabQueryMaxLC() gamut boundary
+ *		querying routine.
+ *
+ *	DOCUMENTATION
+ *		"TekColor Color Management System, System Implementor's Manual"
+ *		and
+ *		Fred W. Billmeyer & Max Saltzman, "Principles of Color
+ *		Technology", John Wily & Sons, Inc, 1981.
+ */
+/* $XFree86$ */
+
+#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_LSTAR	(XcmsFloat)40.0
+#define START_CHROMA	(XcmsFloat)3.6
+
+
+/************************************************************************
+ *									*
+ *			 API PRIVATE ROUTINES				*
+ *									*
+ ************************************************************************/
+
+/*
+ *	NAME
+ *		_XcmsCIELabQueryMaxLCRGB - Compute maximum L* and chroma.
+ *
+ *	SYNOPSIS
+ */
+Status
+_XcmsCIELabQueryMaxLCRGB(
+    XcmsCCC	ccc,
+    XcmsFloat	hue,		    /* hue in radians */
+    XcmsColor   *pColor_return,
+    XcmsRGBi    *pRGB_return)
+/*
+ *	DESCRIPTION
+ *		Return the maximum psychometric chroma for a specified
+ *		hue, and the corresponding L*.  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 psychometric 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 in radians as input and outputs
+ *		Lab and RGBi.
+ *
+ *	RETURNS
+ *		XcmsFailure - Failure
+ *		XcmsSuccess - Succeeded
+ *
+ */ 
+{
+    XcmsFloat nSmall, nLarge;
+    XcmsColor tmp;
+
+    tmp.format = XcmsCIELabFormat;
+    /*  Use some unreachable color on the given hue */
+    tmp.spec.CIELab.L_star = START_LSTAR;
+    tmp.spec.CIELab.a_star = XCMS_CIEASTAROFHUE(hue, START_CHROMA);
+    tmp.spec.CIELab.b_star = XCMS_CIEBSTAROFHUE(hue, START_CHROMA);
+    /*
+     * Convert from Lab 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, ScreenWhitePointOfCCC(ccc), 
+		               (unsigned int)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 Lab */
+    if (_XcmsConvertColorsWithWhitePt(ccc, &tmp,
+	       ScreenWhitePointOfCCC(ccc), 1, XcmsCIELabFormat, (Bool *) NULL) 
+	    == XcmsFailure) {
+	return (XcmsFailure);
+    }
+
+    memcpy((char *)pColor_return, (char *)&tmp, sizeof(XcmsColor));
+    return (XcmsSuccess);    
+}
+
+
+/************************************************************************
+ *									*
+ *			 PUBLIC ROUTINES				*
+ *									*
+ ************************************************************************/
+
+/*
+ *	NAME
+ *		XcmsCIELabQueryMaxLC - Compute maximum L* and chroma.
+ *
+ *	SYNOPSIS
+ */
+Status
+XcmsCIELabQueryMaxLC (ccc, hue_angle, pColor_return)
+    XcmsCCC ccc;
+    XcmsFloat hue_angle;	    /* hue_angle in degrees */
+    XcmsColor *pColor_return;
+
+/*
+ *	DESCRIPTION
+ *		Return the point of maximum chroma for the specified
+ *		hue_angle.
+ *
+ *	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);
+    }
+    
+    /* Use my own CCC */
+    memcpy ((char *)&myCCC, (char *)ccc, sizeof(XcmsCCCRec));
+    myCCC.clientWhitePt.format = XcmsUndefinedFormat;
+    myCCC.gamutCompProc = (XcmsCompressionProc)NULL;
+
+    while (hue_angle < 0.0) {
+	hue_angle += 360.0;
+    }
+    while (hue_angle >= 360.0) {
+	hue_angle -= 360.0;
+    } 
+    
+    return(_XcmsCIELabQueryMaxLCRGB (&myCCC, radians(hue_angle), pColor_return,
+	    (XcmsRGBi *)NULL));
+}