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, 203 insertions, 0 deletions

diff --git a/nx-X11/lib/X11/HVCGcV.c b/nx-X11/lib/X11/HVCGcV.c
new file mode 100644
index 000000000..4e2c63688
--- /dev/null
+++ b/nx-X11/lib/X11/HVCGcV.c
@@ -0,0 +1,203 @@
+/* $Xorg: HVCGcV.c,v 1.3 2000/08/17 19:44:36 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.  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
+ *		TekHVCGcV.c
+ *
+ *	DESCRIPTION
+ *		Source for XcmsTekHVCClipV() gamut compression routine.
+ *
+ */
+/* $XFree86: xc/lib/X11/HVCGcV.c,v 1.3 2001/01/17 19:41:37 dawes Exp $ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+#include "Xlibint.h"
+#include "Xcmsint.h"
+#include "Cv.h"
+
+
+/************************************************************************
+ *									*
+ *			 PUBLIC ROUTINES				*
+ *									*
+ ************************************************************************/
+
+/*
+ *	NAME
+ *		XcmsTekHVCClipV - Return the closest value
+ *
+ *	SYNOPSIS
+ */
+/* ARGSUSED */
+Status
+XcmsTekHVCClipV (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 value 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 value within
+ *		pColor_in_out intermediate results may be returned
+ *		even though it may be invalid.
+ *
+ *	RETURNS
+ *		XcmsFailure - Failure
+ *              XcmsSuccess - Succeeded
+ *
+ */
+{
+    XcmsColor  *pColor;
+    XcmsColor  hvc_max;
+    XcmsCCCRec myCCC;
+    Status retval;
+
+    /*
+     * 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 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 &&
+	    FunctionSetOfCCC(ccc) != (XPointer) &XcmsLinearRGBFunctionSet) {
+	/*
+	 * GRAY !
+	 */
+	return(XcmsFailure);
+    } else {
+	/* Convert from CIEXYZ to TekHVC format */
+	if (_XcmsDIConvertColors(&myCCC, pColor,
+		&myCCC.pPerScrnInfo->screenWhitePt, 1, XcmsTekHVCFormat)
+		== XcmsFailure) {
+	    return(XcmsFailure);
+	}
+
+	/* check to make sure we have a valid TekHVC number */
+	if (!_XcmsTekHVC_CheckModify (pColor)) {
+	    return (XcmsFailure);
+	}
+
+	/* Step 1: compute the maximum value and chroma for this hue. */
+	/*         This copy may be overkill but it preserves the pixel etc. */
+	memcpy((char *)&hvc_max, (char *)pColor, sizeof(XcmsColor));
+	if (_XcmsTekHVCQueryMaxVCRGB (&myCCC, hvc_max.spec.TekHVC.H, &hvc_max,
+		(XcmsRGBi *)NULL) == XcmsFailure) {
+	    return (XcmsFailure);
+	}
+
+	/* Now check and return the appropriate value */
+	if (pColor->spec.TekHVC.C == hvc_max.spec.TekHVC.C) {
+	    /* When the chroma input is equal to the maximum chroma */
+	    /* merely return the value for that chroma. */
+	    pColor->spec.TekHVC.V = hvc_max.spec.TekHVC.V;
+	    if (!_XcmsTekHVC_CheckModify (pColor)) {
+		return (XcmsFailure);
+	    }
+	    retval = _XcmsDIConvertColors(&myCCC, pColor,
+		    &myCCC.pPerScrnInfo->screenWhitePt, 1, XcmsCIEXYZFormat);
+	} else if (pColor->spec.TekHVC.C > hvc_max.spec.TekHVC.C) {
+	    /* When the chroma input is greater than the maximum chroma */
+	    /* merely return the value and chroma for the given hue. */
+	    pColor->spec.TekHVC.C = hvc_max.spec.TekHVC.C;
+	    pColor->spec.TekHVC.V = hvc_max.spec.TekHVC.V;
+	    return (XcmsFailure);
+	} else if (pColor->spec.TekHVC.V < hvc_max.spec.TekHVC.V) {
+	    /* When the value input is less than the maximum value point */
+	    /* compute the intersection of the line from 0,0 to max_V, max_C */
+	    /* using the chroma input. */
+	    pColor->spec.TekHVC.V = pColor->spec.TekHVC.C * 
+				    hvc_max.spec.TekHVC.V / hvc_max.spec.TekHVC.C;
+	    if (pColor->spec.TekHVC.V >= hvc_max.spec.TekHVC.V) {
+		pColor->spec.TekHVC.C = hvc_max.spec.TekHVC.C;
+		pColor->spec.TekHVC.V = hvc_max.spec.TekHVC.V;
+	    }
+	    if (!_XcmsTekHVC_CheckModify (pColor)) {
+		return (XcmsFailure);
+	    }
+	    retval = _XcmsDIConvertColors(&myCCC, pColor,
+		    &myCCC.pPerScrnInfo->screenWhitePt, 1, XcmsCIEXYZFormat);
+	} else {
+	    /* When the value input is greater than the maximum value point */
+	    /* use HvcMaxValue to find the maximum value for the given chroma. */
+	    if (pColor->format != XcmsTekHVCFormat) {
+		if (_XcmsDIConvertColors(ccc, pColor,
+			&ccc->pPerScrnInfo->screenWhitePt, 1, XcmsCIEXYZFormat)
+			== XcmsFailure) {
+		    return(XcmsFailure);
+		}
+	    }
+	    if (XcmsTekHVCQueryMaxV(&myCCC,
+		    pColor->spec.TekHVC.H,
+		    pColor->spec.TekHVC.C,
+		    pColor)
+		    == XcmsFailure) {
+		return (XcmsFailure);
+	    }
+	    retval = _XcmsDIConvertColors(&myCCC, pColor,
+		    &myCCC.pPerScrnInfo->screenWhitePt, 1, XcmsCIEXYZFormat);
+	}
+	if (retval != XcmsFailure && pCompressed != NULL) {
+	    *(pCompressed + i) = True;
+	}
+	return(retval);
+    }
+}