1 files changed, 127 insertions, 0 deletions
diff --git a/nx-X11/lib/src/xcms/LuvGcC.c b/nx-X11/lib/src/xcms/LuvGcC.c
new file mode 100644
index 000000000..cadf4a8b2
--- /dev/null
+++ b/nx-X11/lib/src/xcms/LuvGcC.c
@@ -0,0 +1,127 @@
+
+/*
+ * 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
+ *		CIELuvGcC.c
+ *
+ *	DESCRIPTION
+ *		Source for XcmsCIELuvClipuv() gamut compression routine.
+ *
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+#include "Xlibint.h"
+#include "Xcmsint.h"
+#include "Cv.h"
+
+
+/************************************************************************
+ *									*
+ *			 PUBLIC ROUTINES				*
+ *									*
+ ************************************************************************/
+
+/*
+ *	NAME
+ *		XcmsCIELuvClipuv - Reduce the chroma for a hue and L*
+ *
+ *	SYNOPSIS
+ */
+/* ARGSUSED */
+Status
+XcmsCIELuvClipuv (
+    XcmsCCC ccc,
+    XcmsColor *pColors_in_out,
+    unsigned int nColors,
+    unsigned int i,
+    Bool *pCompressed)
+/*
+ *	DESCRIPTION
+ *		Reduce the Chroma for a specific hue and chroma to
+ *		to bring the given color into the gamut of the
+ *		specified device.  As required of gamut compression
+ *		functions, this routine returns pColor_in_out
+ *		in XcmsCIEXYZFormat on successful completion.
+ *
+ *		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
+ *
+ */
+{
+    Status retval;
+    XcmsColor *pColor;
+
+    /*
+     * 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 < PseudoColor) {
+	/*
+	 * GRAY !
+	 */
+	_XcmsDIConvertColors(ccc, pColor, ScreenWhitePointOfCCC(ccc),
+		1, XcmsCIELuvFormat);
+	_XcmsDIConvertColors(ccc, pColor, ScreenWhitePointOfCCC(ccc),
+		1, XcmsCIEXYZFormat);
+	if (pCompressed) {
+	    *(pCompressed + i) = True;
+	}
+	return(XcmsSuccess);
+    } else {
+	if (pColor->format != XcmsCIELuvFormat) {
+	    if (_XcmsDIConvertColors(ccc, pColor,
+		    &ccc->pPerScrnInfo->screenWhitePt, 1, XcmsCIELuvFormat)
+		    == XcmsFailure) {
+		return(XcmsFailure);
+	    }
+	}
+	if (XcmsCIELuvQueryMaxC(ccc,
+		degrees(XCMS_CIELUV_PMETRIC_HUE(pColor->spec.CIELuv.u_star,
+						pColor->spec.CIELuv.v_star)),
+		pColor->spec.CIELuv.L_star,
+		pColor) == XcmsFailure) {
+	    return(XcmsFailure);
+	}
+	retval = _XcmsDIConvertColors(ccc, pColor,
+		&ccc->pPerScrnInfo->screenWhitePt, 1, XcmsCIEXYZFormat);
+	if (retval != XcmsFailure && pCompressed != NULL) {
+	    *(pCompressed + i) = True;
+	}
+	return(retval);
+    }
+}