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, 244 insertions, 0 deletions

diff --git a/nx-X11/lib/X11/XRGB.c b/nx-X11/lib/X11/XRGB.c
new file mode 100644
index 000000000..0d7e24c7d
--- /dev/null
+++ b/nx-X11/lib/X11/XRGB.c
@@ -0,0 +1,244 @@
+/* $Xorg: XRGB.c,v 1.3 2000/08/17 19:45:04 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
+ *		XcmsRtoX.c
+ *
+ *	DESCRIPTION
+ *		Convert color specifications in XcmsRGB format in one array of
+ *		XcmsColor structures to RGB in an array of XColor structures.
+ *
+ *
+ */
+/* $XFree86: xc/lib/X11/XRGB.c,v 3.3 2001/07/29 05:01:11 tsi Exp $ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+#include "Xlibint.h"
+#include "Xcmsint.h"
+#include "Cv.h"
+
+/*
+ *      LOCAL VARIABLES
+ */
+
+static unsigned short const MASK[17] = {
+    0x0000,	/*  0 bitsPerRGB */
+    0x8000,	/*  1 bitsPerRGB */
+    0xc000,	/*  2 bitsPerRGB */
+    0xe000,	/*  3 bitsPerRGB */
+    0xf000,	/*  4 bitsPerRGB */
+    0xf800,	/*  5 bitsPerRGB */
+    0xfc00,	/*  6 bitsPerRGB */
+    0xfe00,	/*  7 bitsPerRGB */
+    0xff00,	/*  8 bitsPerRGB */
+    0xff80,	/*  9 bitsPerRGB */
+    0xffc0,	/* 10 bitsPerRGB */
+    0xffe0,	/* 11 bitsPerRGB */
+    0xfff0,	/* 12 bitsPerRGB */
+    0xfff8,	/* 13 bitsPerRGB */
+    0xfffc,	/* 14 bitsPerRGB */
+    0xfffe,	/* 15 bitsPerRGB */
+    0xffff	/* 16 bitsPerRGB */
+};
+
+
+
+/************************************************************************
+ *									*
+ *			API PRIVATE ROUTINES				*
+ *									*
+ ************************************************************************/
+
+/*
+ *	NAME
+ *		_XcmsRGB_to_XColor - 
+ *
+ *	SYNOPSIS
+ */
+void
+_XcmsRGB_to_XColor(
+    XcmsColor *pColors,
+    XColor *pXColors,
+    unsigned int nColors)
+/*
+ *	DESCRIPTION
+ *	    Translates a color specification in XcmsRGBFormat in a XcmsColor
+ * 	    structure to an XColor structure.
+ *
+ *	RETURNS
+ *		void.
+ */
+{
+    for (; nColors--; pXColors++, pColors++) {
+	pXColors->pixel = pColors->pixel;
+	pXColors->red = pColors->spec.RGB.red;
+	pXColors->green = pColors->spec.RGB.green;
+	pXColors->blue  = pColors->spec.RGB.blue;
+	pXColors->flags = (DoRed | DoGreen | DoBlue);
+    }
+}
+
+
+/*
+ *	NAME
+ *		_XColor_to_XcmsRGB
+ *
+ *	SYNOPSIS
+ */
+void
+_XColor_to_XcmsRGB(
+    XcmsCCC ccc,
+    XColor *pXColors,
+    XcmsColor *pColors,
+    unsigned int nColors)
+/*
+ *	DESCRIPTION
+ *		Translates an RGB color specification in an XColor
+ *		structure to an XcmsRGB structure.
+ *
+ *		IMPORTANT NOTE:  Bit replication that may have been caused
+ *		with ResolveColor() routine in the X Server is undone
+ *		here if requested!  For example, if red = 0xcaca and the
+ *		bits_per_rgb is 8, then spec.RGB.red will be 0xca00.
+ *
+ *	RETURNS
+ *		void
+ */
+{
+    int bits_per_rgb = ccc->visual->bits_per_rgb;
+
+    for (; nColors--; pXColors++, pColors++) {
+	pColors->spec.RGB.red = (pXColors->red & MASK[bits_per_rgb]);
+	pColors->spec.RGB.green = (pXColors->green & MASK[bits_per_rgb]);
+	pColors->spec.RGB.blue = (pXColors->blue & MASK[bits_per_rgb]);
+	pColors->format = XcmsRGBFormat;
+	pColors->pixel = pXColors->pixel;
+    }
+}
+
+
+/*
+ *	NAME
+ *		_XcmsResolveColor
+ *
+ *	SYNOPSIS
+ */
+void
+_XcmsResolveColor(
+    XcmsCCC ccc,
+    XcmsColor *pXcmsColor)
+/*
+ *	DESCRIPTION
+ *	    Uses the X Server ResolveColor() algorithm to
+ *	    modify values to closest values supported by hardware.
+ *	    Old algorithm simply masked low-order bits.  The new algorithm
+ *	    has the effect of replicating significant bits into lower order
+ *	    bits in order to stretch the hardware value into all 16 bits.
+ *
+ *	    On a display with N-bit DACs, the "hardware" color is computed as:
+ *
+ *	    ((unsignedlong)(ClientValue >> (16-N)) * 0xFFFF) / ((1 << N) - 1)
+ *		
+ *
+ *	RETURNS
+ *		void.
+ */
+{
+    int shift;
+    int max_color;
+
+    shift = 16 - ccc->visual->bits_per_rgb;
+    max_color = (1 << ccc->visual->bits_per_rgb) - 1;
+
+
+    pXcmsColor->spec.RGB.red =
+	    ((unsigned long)(pXcmsColor->spec.RGB.red >> shift) * 0xFFFF)
+	    / max_color;
+    pXcmsColor->spec.RGB.green =
+	    ((unsigned long)(pXcmsColor->spec.RGB.green >> shift) * 0xFFFF)
+	    / max_color;
+    pXcmsColor->spec.RGB.blue =
+	    ((unsigned long)(pXcmsColor->spec.RGB.blue  >> shift) * 0xFFFF)
+	    / max_color;
+}
+
+
+/*
+ *	NAME
+ *		_XcmsUnresolveColor
+ *
+ *	SYNOPSIS
+ */
+void
+_XcmsUnresolveColor(
+    XcmsCCC ccc,
+    XcmsColor *pColor)
+/*
+ *	DESCRIPTION
+ *		Masks out insignificant bits.
+ *
+ *	RETURNS
+ *		void.
+ *
+ *	ASSUMPTIONS
+ *		format == XcmsRGBFormat
+ */
+{
+    int bits_per_rgb = ccc->visual->bits_per_rgb;
+
+    pColor->spec.RGB.red &= MASK[bits_per_rgb];
+    pColor->spec.RGB.green &= MASK[bits_per_rgb];
+    pColor->spec.RGB.blue &= MASK[bits_per_rgb];
+}
+
+
+/*
+ *	NAME
+ *		_XUnresolveColor
+ *
+ *	SYNOPSIS
+ */
+void
+_XUnresolveColor(
+    XcmsCCC ccc,
+    XColor *pXColor)
+/*
+ *	DESCRIPTION
+ *		Masks out insignificant bits.
+ *
+ *	RETURNS
+ *		void.
+ */
+{
+    int bits_per_rgb = ccc->visual->bits_per_rgb;
+
+    pXColor->red &= MASK[bits_per_rgb];
+    pXColor->green &= MASK[bits_per_rgb];
+    pXColor->blue &= MASK[bits_per_rgb];
+}
+