Merge branch 'sunweaver-pr/libnx-x11-autoreconf' into 3.6.x

Attributes GH PR #498: https://github.com/ArcticaProject/nx-libs/pull/498

1 files changed, 262 insertions, 0 deletions

diff --git a/nx-X11/lib/src/xcms/HVCGcVC.c b/nx-X11/lib/src/xcms/HVCGcVC.c
new file mode 100644
index 000000000..7ace5f13f
--- /dev/null
+++ b/nx-X11/lib/src/xcms/HVCGcVC.c
@@ -0,0 +1,262 @@
+
+/*
+ * 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
+ *		TekHVCGcVC.c
+ *
+ *	DESCRIPTION
+ *		Source for XcmsTekHVCClipVC() gamut
+ *		compression function.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+#include "Xlibint.h"
+#include "Xcmsint.h"
+#include <math.h>
+#include "Cv.h"
+
+/*
+ *	INTERNALS
+ *		Internal defines that need NOT be exported to any package or
+ *		program using this package.
+ */
+#define MAXBISECTCOUNT	100
+
+
+/************************************************************************
+ *									*
+ *			 PUBLIC ROUTINES				*
+ *									*
+ ************************************************************************/
+
+/*
+ *	NAME
+ *		XcmsTekHVCClipVC - Return the closest value and chroma
+ *
+ *	SYNOPSIS
+ */
+/* ARGSUSED */
+Status
+XcmsTekHVCClipVC (
+    XcmsCCC ccc,
+    XcmsColor *pColors_in_out,
+    unsigned int nColors,
+    unsigned int i,
+    Bool *pCompressed)
+/*
+ *	DESCRIPTION
+ *		This routine will find the closest value and chroma
+ *		for a specific hue.  The color input is converted to
+ *		HVC format and returned as CIE XYZ format.
+ *
+ *		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
+ *
+ */
+{
+    Status retval;
+    XcmsCCCRec	myCCC;
+    XcmsColor  *pColor;
+    XcmsColor  hvc_max;
+    XcmsRGBi   rgb_max;
+    int	      nCount, nMaxCount, nI, nILast;
+    XcmsFloat  Chroma, Value, bestChroma, bestValue, nT, saveDist, tmpDist;
+
+    /*
+     * 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 white pt */
+    myCCC.gamutCompProc = (XcmsCompressionProc)NULL;/* no gamut compression func */
+
+    /*
+     * 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 !
+	 */
+	_XcmsDIConvertColors(ccc, pColor, &ccc->pPerScrnInfo->screenWhitePt,
+		1, XcmsTekHVCFormat);
+	pColor->spec.TekHVC.H = pColor->spec.TekHVC.C = 0.0;
+	_XcmsDIConvertColors(ccc, pColor, &ccc->pPerScrnInfo->screenWhitePt,
+		1, XcmsCIEXYZFormat);
+	if (pCompressed) {
+	    *(pCompressed + i) = True;
+	}
+	return(XcmsSuccess);
+    } else {
+	/* Convert from CIEXYZ to TekHVC format */
+	if (_XcmsDIConvertColors(&myCCC, pColor,
+		&myCCC.pPerScrnInfo->screenWhitePt, 1, XcmsTekHVCFormat)
+		== XcmsFailure) {
+	    return(XcmsFailure);
+	}
+
+	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,
+		&rgb_max) == XcmsFailure) {
+	    return (XcmsFailure);
+	}
+
+	/* Now check and return the appropriate value */
+	if (pColor->spec.TekHVC.V == hvc_max.spec.TekHVC.V) {
+	    /* When the value input is equal to the maximum value */
+	    /* merely return the chroma for that value. */
+	    pColor->spec.TekHVC.C = hvc_max.spec.TekHVC.C;
+	    retval = _XcmsDIConvertColors(&myCCC, pColor,
+		    &myCCC.pPerScrnInfo->screenWhitePt, 1, XcmsCIEXYZFormat);
+	}
+
+	if (pColor->spec.TekHVC.V < hvc_max.spec.TekHVC.V) {
+	    /* return the intersection of the perpindicular line through     */
+	    /* the value and chroma given and the line from 0,0 and hvc_max. */
+	    Chroma = pColor->spec.TekHVC.C;
+	    Value = pColor->spec.TekHVC.V;
+	    pColor->spec.TekHVC.C =
+	       (Value + (hvc_max.spec.TekHVC.C / hvc_max.spec.TekHVC.V * Chroma)) /
+	       ((hvc_max.spec.TekHVC.V / hvc_max.spec.TekHVC.C) +
+		(hvc_max.spec.TekHVC.C / hvc_max.spec.TekHVC.V));
+	    if (pColor->spec.TekHVC.C >= hvc_max.spec.TekHVC.C) {
+		pColor->spec.TekHVC.C = hvc_max.spec.TekHVC.C;
+		pColor->spec.TekHVC.V = hvc_max.spec.TekHVC.V;
+	    } else {
+		pColor->spec.TekHVC.V = pColor->spec.TekHVC.C *
+				    hvc_max.spec.TekHVC.V / hvc_max.spec.TekHVC.C;
+	    }
+	    retval = _XcmsDIConvertColors(&myCCC, pColor,
+		    &myCCC.pPerScrnInfo->screenWhitePt, 1, XcmsCIEXYZFormat);
+
+	    if (retval != XcmsFailure && pCompressed != NULL) {
+		*(pCompressed + i) = True;
+	    }
+	    return (retval);
+	}
+
+	/* return the closest point on the upper part of the hue leaf. */
+	/* must do a bisection here to compute the delta e. */
+	nMaxCount = MAXBISECTCOUNT;
+	nI =     nMaxCount / 2;
+	bestValue = Value =  pColor->spec.TekHVC.V;
+	bestChroma = Chroma = pColor->spec.TekHVC.C;
+	saveDist = (XcmsFloat) XCMS_SQRT ((double) (((Chroma - hvc_max.spec.TekHVC.C) *
+					       (Chroma - hvc_max.spec.TekHVC.C)) +
+					      ((Value - hvc_max.spec.TekHVC.V) *
+					       (Value - hvc_max.spec.TekHVC.V))));
+	for (nCount = 0; nCount < nMaxCount; nCount++) {
+	    nT = (XcmsFloat) nI / (XcmsFloat) nMaxCount;
+	    pColor->spec.RGBi.red   = rgb_max.red * (1.0 - nT) + nT;
+	    pColor->spec.RGBi.green = rgb_max.green * (1.0 - nT) + nT;
+	    pColor->spec.RGBi.blue  = rgb_max.blue * (1.0 - nT) + nT;
+	    pColor->format = XcmsRGBiFormat;
+
+	    /* Convert from RGBi to HVC */
+	    if (_XcmsConvertColorsWithWhitePt(&myCCC, pColor,
+		    &myCCC.pPerScrnInfo->screenWhitePt, 1, XcmsTekHVCFormat,
+		    (Bool *) NULL)
+		    == XcmsFailure) {
+		return (XcmsFailure);
+	    }
+	    if (!_XcmsTekHVC_CheckModify(pColor)) {
+		return (XcmsFailure);
+	    }
+	    tmpDist = (XcmsFloat) XCMS_SQRT ((double)
+			(((Chroma - pColor->spec.TekHVC.C) *
+			  (Chroma - pColor->spec.TekHVC.C)) +
+			 ((Value - pColor->spec.TekHVC.V) *
+			  (Value - pColor->spec.TekHVC.V))));
+	    nILast = nI;
+	    if (tmpDist > saveDist) {
+		nI /= 2;
+	    } else {
+		nI = (nMaxCount + nI) / 2;
+		saveDist = tmpDist;
+		bestValue = pColor->spec.TekHVC.V;
+		bestChroma = pColor->spec.TekHVC.C;
+	    }
+	    if (nI == nILast || nI == 0) {
+		break;
+	    }
+
+	}
+
+	if (bestChroma >= hvc_max.spec.TekHVC.C) {
+	    pColor->spec.TekHVC.C = hvc_max.spec.TekHVC.C;
+	    pColor->spec.TekHVC.V = hvc_max.spec.TekHVC.V;
+	} else {
+	    pColor->spec.TekHVC.C = bestChroma;
+	    pColor->spec.TekHVC.V = bestValue;
+	}
+	if (!_XcmsTekHVC_CheckModify(pColor)) {
+	    return (XcmsFailure);
+	}
+	retval = _XcmsDIConvertColors(&myCCC, pColor,
+		&myCCC.pPerScrnInfo->screenWhitePt, 1, XcmsCIEXYZFormat);
+
+	if (retval != XcmsFailure && pCompressed != NULL) {
+	    *(pCompressed + i) = True;
+	}
+	return(retval);
+    }
+}