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, 176 insertions, 0 deletions

diff --git a/nx-X11/lib/X11/LuvGcL.c b/nx-X11/lib/X11/LuvGcL.c
new file mode 100644
index 000000000..81a553d3f
--- /dev/null
+++ b/nx-X11/lib/X11/LuvGcL.c
@@ -0,0 +1,176 @@
+/* $Xorg: LuvGcL.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
+ *		CIELuvGcL.c
+ *
+ *	DESCRIPTION
+ *		Source for XcmsCIELuvClipL() gamut compression routine.
+ *
+ */
+/* $XFree86: xc/lib/X11/LuvGcL.c,v 1.3 2001/01/17 19:41:39 dawes Exp $ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+#include "Xlibint.h"
+#include "Xcmsint.h"
+#include "Cv.h"
+
+
+/************************************************************************
+ *									*
+ *			 PUBLIC ROUTINES				*
+ *									*
+ ************************************************************************/
+
+/*
+ *	NAME
+ *		XcmsCIELuvClipL - Return the closest L*
+ *
+ *	SYNOPSIS
+ */
+/* ARGSUSED */
+Status
+XcmsCIELuvClipL (ccc, pColors_in_out, nColors, i, pCompressed)
+    XcmsCCC ccc;
+    XcmsColor *pColors_in_out;
+    unsigned int nColors;
+    unsigned int i;
+    Bool *pCompressed;
+/*
+ *	DESCRIPTION
+ *		Return the closest L* for a specific hue and chroma.
+ *		This routine takes any color as input and outputs 
+ *		a CIE XYZ color.
+ *
+ *		Since this routine works with the L* within
+ *		pColor_in_out intermediate results may be returned
+ *		even though it may be invalid.
+ *
+ *	RETURNS
+ *		XcmsFailure - Failure
+ *              XcmsSuccess - Succeeded
+ *
+ */
+{
+    XcmsCCCRec	myCCC;
+    XcmsColor	*pColor;
+    XcmsColor   Luv_max;
+    XcmsFloat	hue, chroma, maxChroma;
+    Status retval;
+
+    /* Use my own CCC */
+    memcpy ((char *)&myCCC, (char *)ccc, sizeof(XcmsCCCRec));
+    myCCC.clientWhitePt.format = XcmsUndefinedFormat;/* Inherit Screen WP */
+    myCCC.gamutCompProc = (XcmsCompressionProc)NULL;/* no gamut compression */
+
+    /*
+     * 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) {
+	/*
+	 * GRAY !
+	 */
+	return(XcmsFailure);
+    } else {
+	/* Convert from CIEXYZ to CIE L*u*v* format */
+	if (_XcmsDIConvertColors(&myCCC, pColor,
+		ScreenWhitePointOfCCC(&myCCC), 1, XcmsCIELuvFormat)
+		== XcmsFailure) {
+	    return(XcmsFailure);
+	}
+
+	hue = XCMS_CIELUV_PMETRIC_HUE(pColor->spec.CIELuv.u_star,
+				      pColor->spec.CIELuv.v_star);
+	chroma = XCMS_CIELUV_PMETRIC_CHROMA(pColor->spec.CIELuv.u_star,
+					    pColor->spec.CIELuv.v_star);
+	/* Step 1: compute the maximum L* and chroma for this hue. */
+	/*         This copy may be overkill but it preserves the pixel etc. */
+	memcpy((char *)&Luv_max, (char *)pColor, sizeof(XcmsColor));
+	if (_XcmsCIELuvQueryMaxLCRGB (&myCCC, hue, &Luv_max,
+		(XcmsRGBi *)NULL) == XcmsFailure) {
+	    return (XcmsFailure);
+	}
+	maxChroma = XCMS_CIELUV_PMETRIC_CHROMA(Luv_max.spec.CIELuv.u_star,
+					       Luv_max.spec.CIELuv.v_star);
+
+	/* Now check and return the appropriate L* */
+	if (chroma == maxChroma) {
+	    /* When the chroma input is equal to the maximum chroma */
+	    /* merely return the L* for that chroma. */
+	    memcpy((char *)pColor, (char *)&Luv_max, sizeof(XcmsColor));
+	    retval = _XcmsDIConvertColors(&myCCC, pColor,
+		    ScreenWhitePointOfCCC(&myCCC), 1, XcmsCIEXYZFormat);
+	} else if (chroma > maxChroma) {
+	    /* When the chroma input is greater than the maximum chroma */
+	    /* merely return the L* and chroma for the given hue. */
+	    memcpy((char *)pColor, (char *)&Luv_max, sizeof(XcmsColor));
+	    return (XcmsFailure);
+	} else if (pColor->spec.CIELuv.L_star < Luv_max.spec.CIELuv.L_star) {
+	    /* Find the minimum lightness for the given chroma. */  
+	    if (pColor->format != XcmsCIELuvFormat) {
+		if (_XcmsDIConvertColors(ccc, pColor,
+			ScreenWhitePointOfCCC(ccc), 1, XcmsCIELuvFormat)
+			== XcmsFailure) {
+		    return(XcmsFailure);
+		}
+	    }
+	    if (XcmsCIELuvQueryMinL(&myCCC, degrees(hue), chroma, pColor)
+		== XcmsFailure) {
+		    return (XcmsFailure);
+	    }
+	    retval = _XcmsDIConvertColors(&myCCC, pColor,
+		           ScreenWhitePointOfCCC(&myCCC), 1, XcmsCIEXYZFormat);
+	} else {
+	    /* Find the maximum lightness for the given chroma. */
+	    if (pColor->format != XcmsCIELuvFormat) {
+		if (_XcmsDIConvertColors(ccc, pColor,
+			      ScreenWhitePointOfCCC(ccc), 1, XcmsCIELuvFormat)
+			== XcmsFailure) {
+		    return(XcmsFailure);
+		}
+	    }
+	    if (XcmsCIELuvQueryMaxL(&myCCC, degrees(hue), chroma, pColor)
+		== XcmsFailure) {
+		    return (XcmsFailure);
+	    }
+	    retval = _XcmsDIConvertColors(&myCCC, pColor,
+		           ScreenWhitePointOfCCC(&myCCC), 1, XcmsCIEXYZFormat);
+	}
+	if (retval != XcmsFailure && pCompressed != NULL) {
+	    *(pCompressed + i) = True;
+	}
+	return(retval);
+    }
+}