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, 386 insertions, 0 deletions

diff --git a/nx-X11/lib/X11/Luv.c b/nx-X11/lib/X11/Luv.c
new file mode 100644
index 000000000..ec94c9e56
--- /dev/null
+++ b/nx-X11/lib/X11/Luv.c
@@ -0,0 +1,386 @@
+/* $Xorg: Luv.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
+ *		CIELuv.c
+ *
+ *	DESCRIPTION
+ *		This file contains routines that support the CIE L*u*v*
+ *		color space to include conversions to and from the CIE
+ *		XYZ space.
+ *
+ *	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: xc/lib/X11/Luv.c,v 1.3 2001/01/17 19:41:39 dawes Exp $ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+#include <X11/Xos.h>
+#include "Xlibint.h"
+#include "Xcmsint.h"
+#include "Cv.h"
+
+#include <stdio.h> /* sscanf */
+
+
+/*
+ *	FORWARD DECLARATIONS
+ */
+
+static int CIELuv_ParseString(register char *spec, XcmsColor *pColor);
+static Status XcmsCIELuv_ValidSpec(XcmsColor *pColor);
+
+/*
+ *	DEFINES
+ *		Internal definitions that need NOT be exported to any package
+ *		or program using this package.
+ */
+#ifdef DBL_EPSILON
+#  define XMY_DBL_EPSILON DBL_EPSILON
+#else
+#  define XMY_DBL_EPSILON 0.00001
+#endif
+
+
+/*
+ *	LOCAL VARIABLES
+ */
+
+    /*
+     * NULL terminated list of functions applied to get from CIELuv to CIEXYZ
+     */
+static XcmsConversionProc Fl_CIELuv_to_CIEXYZ[] = {
+    XcmsCIELuvToCIEuvY,
+    XcmsCIEuvYToCIEXYZ,
+    NULL
+};
+
+    /*
+     * NULL terminated list of functions applied to get from CIEXYZ to CIELuv
+     */
+static XcmsConversionProc Fl_CIEXYZ_to_CIELuv[] = {
+    XcmsCIEXYZToCIEuvY,
+    XcmsCIEuvYToCIELuv,
+    NULL
+};
+
+/*
+ *	GLOBALS
+ */
+
+    /*
+     * CIE Luv Color Space
+     */
+XcmsColorSpace	XcmsCIELuvColorSpace =
+    {
+	_XcmsCIELuv_prefix,	/* prefix */
+	XcmsCIELuvFormat,		/* id */
+	CIELuv_ParseString,	/* parseString */
+	Fl_CIELuv_to_CIEXYZ,	/* to_CIEXYZ */
+	Fl_CIEXYZ_to_CIELuv,	/* from_CIEXYZ */
+	1
+    };
+
+
+/************************************************************************
+ *									*
+ *			 PRIVATE ROUTINES				*
+ *									*
+ ************************************************************************/
+
+/*
+ *	NAME
+ *		CIELuv_ParseString
+ *
+ *	SYNOPSIS
+ */
+static int
+CIELuv_ParseString(
+    register char *spec,
+    XcmsColor *pColor)
+/*
+ *	DESCRIPTION
+ *		This routines takes a string and attempts to convert
+ *		it into a XcmsColor structure with XcmsCIELuvFormat.
+ *		The assumed CIELuv string syntax is:
+ *		    CIELuv:<L>/<u>/<v>
+ *		Where L, u, and v are in string input format for floats
+ *		consisting of:
+ *		    a. an optional sign
+ *		    b. a string of numbers possibly containing a decimal point,
+ *		    c. an optional exponent field containing an 'E' or 'e'
+ *			followed by a possibly signed integer string.
+ *
+ *	RETURNS
+ *		0 if failed, non-zero otherwise.
+ */
+{
+    int n;
+    char *pchar;
+
+    if ((pchar = strchr(spec, ':')) == NULL) {
+	return(XcmsFailure);
+    }
+    n = (int)(pchar - spec);
+
+    /*
+     * Check for proper prefix.
+     */
+    if (strncmp(spec, _XcmsCIELuv_prefix, n) != 0) {
+	return(XcmsFailure);
+    }
+
+    /*
+     * Attempt to parse the value portion.
+     */
+    if (sscanf(spec + n + 1, "%lf/%lf/%lf",
+	    &pColor->spec.CIELuv.L_star,
+	    &pColor->spec.CIELuv.u_star,
+	    &pColor->spec.CIELuv.v_star) != 3) {
+	return(XcmsFailure);
+    }
+    pColor->format = XcmsCIELuvFormat;
+    pColor->pixel = 0;
+    return(XcmsCIELuv_ValidSpec(pColor));
+}
+
+
+/************************************************************************
+ *									*
+ *			 PUBLIC ROUTINES				*
+ *									*
+ ************************************************************************/
+
+/*
+ *	NAME
+ *		XcmsCIELuv_ValidSpec
+ *
+ *	SYNOPSIS
+ */
+static Status
+XcmsCIELuv_ValidSpec(
+    XcmsColor *pColor)
+/*
+ *	DESCRIPTION
+ *		Checks if color specification valid for CIE L*u*v*.
+ *
+ *	RETURNS
+ *		XcmsFailure if invalid,
+ *		XcmsSuccess if valid.
+ *
+ */
+{
+    if (pColor->format != XcmsCIELuvFormat
+	    ||
+	    (pColor->spec.CIELuv.L_star < 0.0 - XMY_DBL_EPSILON)
+	    ||
+	    (pColor->spec.CIELuv.L_star > 100.0 + XMY_DBL_EPSILON)) {
+	return(XcmsFailure);
+    }
+    return(XcmsSuccess);
+}
+
+
+/*
+ *	NAME
+ *		XcmsCIELuvToCIEuvY - convert CIELuv to CIEuvY
+ *
+ *	SYNOPSIS
+ */
+Status
+XcmsCIELuvToCIEuvY(ccc, pLuv_WhitePt, pColors_in_out, nColors)
+    XcmsCCC ccc;
+    XcmsColor *pLuv_WhitePt;
+    XcmsColor *pColors_in_out;
+    unsigned int nColors;
+/*
+ *	DESCRIPTION
+ *		Converts color specifications in an array of XcmsColor
+ *		structures from CIELuv format to CIEuvY format.
+ *
+ *	RETURNS
+ *		XcmsFailure if failed,
+ *		XcmsSuccess if succeeded.
+ *
+ */
+{
+    XcmsColor	*pColor = pColors_in_out;
+    XcmsColor	whitePt;
+    XcmsCIEuvY	uvY_return;
+    XcmsFloat	tmpVal;
+    register int i;
+
+    /*
+     * Check arguments
+     */
+    if (pLuv_WhitePt == NULL || pColors_in_out == NULL) {
+	return(XcmsFailure);
+    }
+
+    /*
+     * Make sure white point is in CIEuvY form
+     */
+    if (pLuv_WhitePt->format != XcmsCIEuvYFormat) {
+	/* Make copy of the white point because we're going to modify it */
+	memcpy((char *)&whitePt, (char *)pLuv_WhitePt, sizeof(XcmsColor));
+	if (!_XcmsDIConvertColors(ccc, &whitePt, (XcmsColor *)NULL,
+		1, XcmsCIEuvYFormat)) {
+	    return(XcmsFailure);
+	}
+	pLuv_WhitePt = &whitePt;
+    }
+    /* Make sure it is a white point, i.e., Y == 1.0 */
+    if (pLuv_WhitePt->spec.CIEuvY.Y != 1.0) {
+	return(XcmsFailure);
+    }
+
+    /*
+     * Now convert each XcmsColor structure to CIEXYZ form
+     */
+    for (i = 0; i < nColors; i++, pColor++) {
+
+	/* Make sure original format is CIELuv and is valid */
+	if (!XcmsCIELuv_ValidSpec(pColor)) {
+	    return(XcmsFailure);
+	}
+
+	if (pColor->spec.CIELuv.L_star < 7.99953624) {
+	    uvY_return.Y = pColor->spec.CIELuv.L_star / 903.29;
+	} else {
+	    tmpVal = (pColor->spec.CIELuv.L_star + 16.0) / 116.0;
+	    uvY_return.Y = tmpVal * tmpVal * tmpVal; /* tmpVal ** 3 */
+	}
+
+
+
+	if (pColor->spec.CIELuv.L_star == 0.0) {
+	    uvY_return.u_prime = pLuv_WhitePt->spec.CIEuvY.u_prime;
+	    uvY_return.v_prime = pLuv_WhitePt->spec.CIEuvY.v_prime;
+	} else {
+	    tmpVal = 13.0 * (pColor->spec.CIELuv.L_star / 100.0);
+	    uvY_return.u_prime = pColor->spec.CIELuv.u_star/tmpVal + 
+			    pLuv_WhitePt->spec.CIEuvY.u_prime;
+	    uvY_return.v_prime = pColor->spec.CIELuv.v_star/tmpVal +
+			    pLuv_WhitePt->spec.CIEuvY.v_prime;
+	}
+	/* Copy result to pColor */
+	memcpy((char *)&pColor->spec, (char *)&uvY_return, sizeof(XcmsCIEuvY));
+
+	/* Identify that the format is now CIEuvY */
+	pColor->format = XcmsCIEuvYFormat;
+    }
+    return(XcmsSuccess);
+}
+
+
+/*
+ *	NAME
+ *		XcmsCIEuvYToCIELuv - convert CIEuvY to CIELuv
+ *
+ *	SYNOPSIS
+ */
+Status
+XcmsCIEuvYToCIELuv(ccc, pLuv_WhitePt, pColors_in_out, nColors)
+    XcmsCCC ccc;
+    XcmsColor *pLuv_WhitePt;
+    XcmsColor *pColors_in_out;
+    unsigned int nColors;
+/*
+ *	DESCRIPTION
+ *		Converts color specifications in an array of XcmsColor
+ *		structures from CIEuvY format to CIELab format.
+ *
+ *	RETURNS
+ *		XcmsFailure if failed,
+ *		XcmsSuccess if succeeded.
+ *
+ */
+{
+    XcmsColor	*pColor = pColors_in_out;
+    XcmsColor	whitePt;
+    XcmsCIELuv	Luv_return;
+    XcmsFloat	tmpVal;
+    register int i;
+
+    /*
+     * Check arguments
+     */
+    if (pLuv_WhitePt == NULL || pColors_in_out == NULL) {
+	return(XcmsFailure);
+    }
+
+    /*
+     * Make sure white point is in CIEuvY form
+     */
+    if (pLuv_WhitePt->format != XcmsCIEuvYFormat) {
+	/* Make copy of the white point because we're going to modify it */
+	memcpy((char *)&whitePt, (char *)pLuv_WhitePt, sizeof(XcmsColor));
+	if (!_XcmsDIConvertColors(ccc, &whitePt,
+		(XcmsColor *)NULL, 1, XcmsCIEuvYFormat)) {
+	    return(XcmsFailure);
+	}
+	pLuv_WhitePt = &whitePt;
+    }
+    /* Make sure it is a white point, i.e., Y == 1.0 */
+    if (pLuv_WhitePt->spec.CIEuvY.Y != 1.0) {
+	return(XcmsFailure);
+    }
+
+    /*
+     * Now convert each XcmsColor structure to CIEXYZ form
+     */
+    for (i = 0; i < nColors; i++, pColor++) {
+
+	if (!_XcmsCIEuvY_ValidSpec(pColor)) {
+	    return(XcmsFailure);
+	}
+
+	/* Now convert the uvY to Luv */
+	Luv_return.L_star = 
+	    (pColor->spec.CIEuvY.Y < 0.008856)
+	    ?
+	    (pColor->spec.CIEuvY.Y * 903.29)
+	    :
+	    ((XcmsFloat)(XCMS_CUBEROOT(pColor->spec.CIEuvY.Y) * 116.0) - 16.0);
+	tmpVal = 13.0 * (Luv_return.L_star / 100.0);
+	Luv_return.u_star = tmpVal *
+	   (pColor->spec.CIEuvY.u_prime - pLuv_WhitePt->spec.CIEuvY.u_prime);
+	Luv_return.v_star = tmpVal *
+	   (pColor->spec.CIEuvY.v_prime - pLuv_WhitePt->spec.CIEuvY.v_prime);
+
+	/* Copy result to pColor */
+	memcpy((char *)&pColor->spec, (char *)&Luv_return, sizeof(XcmsCIELuv));
+
+	/* Identify that the format is now CIEuvY */
+	pColor->format = XcmsCIELuvFormat;
+    }
+    return(XcmsSuccess);
+}