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+\documentclass{article}
+\usepackage{axiom}
+\begin{document}
+\title{\$SPAD/src/lib XShade.c}
+\author{The Axiom Team}
+\maketitle
+\begin{abstract}
+\end{abstract}
+\eject
+\tableofcontents
+\eject
+\section{License}
+<<license>>=
+/*
+Copyright (c) 1991-2002, The Numerical ALgorithms Group Ltd.
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+ - Redistributions of source code must retain the above copyright
+ notice, this list of conditions and the following disclaimer.
+
+ - Redistributions in binary form must reproduce the above copyright
+ notice, this list of conditions and the following disclaimer in
+ the documentation and/or other materials provided with the
+ distribution.
+
+ - Neither the name of The Numerical ALgorithms Group Ltd. nor the
+ names of its contributors may be used to endorse or promote products
+ derived from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
+OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+@
+<<*>>=
+<<license>>
+
+#include "axiom-c-macros.h"
+#ifndef MSYSplatform
+
+#include <stdio.h>
+#if !defined(BSDplatform)
+#include <malloc.h>
+#endif
+#include <stdlib.h>
+
+#include <X11/Xlib.h>
+#include <X11/Xutil.h>
+#include <X11/Xos.h>
+#include <X11/Intrinsic.h>
+#include <X11/StringDefs.h>
+#include <X11/cursorfont.h>
+
+#define XShadeWidth 4
+#define XShadeMax 17
+
+char XShadeBits[] = {
+ 0x00, 0x00, 0x00, 0x00,
+ 0x01, 0x00, 0x00, 0x00,
+ 0x01, 0x00, 0x04, 0x00,
+ 0x05, 0x00, 0x04, 0x00,
+ 0x05, 0x00, 0x05, 0x00,
+ 0x05, 0x02, 0x05, 0x00,
+ 0x05, 0x02, 0x05, 0x08,
+ 0x05, 0x0a, 0x05, 0x08,
+ 0x05, 0x0a, 0x05, 0x0a,
+ 0x07, 0x0a, 0x05, 0x0a,
+ 0x07, 0x0a, 0x0d, 0x0a,
+ 0x0f, 0x0a, 0x0d, 0x0a,
+ 0x0f, 0x0a, 0x0f, 0x0a,
+ 0x0f, 0x0b, 0x0f, 0x0a,
+ 0x0f, 0x0b, 0x0f, 0x0e,
+ 0x0f, 0x0f, 0x0f, 0x0e,
+ 0x0f, 0x0f, 0x0f, 0x0f};
+
+#include "XShade.H1"
+
+Pixmap XShade[XShadeMax];
+GC TileGC;
+unsigned int INIT = 1;
+
+/*
+ * This routine has the function of returning the number of characters needed
+ * to store a bitmap. It first calculates the number of bits needed per line.
+ * Then it finds the closest multiple of 8 which is bigger than the number of
+ * bits. Once that is done, it multiplies this number by the number of bits
+ * high the bitmap is.
+ */
+int
+char_bitmap(void)
+{
+ int bits_line;
+ int total_chars;
+
+ for (bits_line = 8, total_chars = 1; bits_line < XShadeWidth; total_chars++)
+ bits_line += 8;
+
+ total_chars = total_chars * XShadeWidth;
+
+ return total_chars;
+}
+
+int
+XInitShades(Display *display, int screen)
+{
+ char *bits;
+ int count;
+ int chars_bitmap = char_bitmap();
+ int bit;
+
+ bits = (char *) malloc(chars_bitmap * sizeof(char));
+
+ for (count = 0; count < XShadeMax; count++) {
+
+ /* Load in the next bitmap */
+
+ for (bit = 0; bit < chars_bitmap; bit++)
+ bits[bit] = XShadeBits[count * chars_bitmap + bit];
+
+ /* Create it and put it into the Pixmap array */
+
+ XShade[count] = XCreatePixmapFromBitmapData(display,
+ RootWindow(display, screen),
+ bits,
+ XShadeWidth, XShadeWidth,
+ BlackPixel(display, screen),
+ WhitePixel(display, screen),
+ DisplayPlanes(display, screen));
+ }
+ TileGC = XCreateGC(display, RootWindow(display, screen), 0, NULL);
+ XSetFillStyle(display, TileGC, FillTiled);
+ XSetTile(display, TileGC, XShade[XShadeMax / 2]);
+ return XShadeMax;
+}
+
+
+int
+XChangeShade(Display *display, int shade)
+{
+ if (shade >= XShadeMax || shade < 0) {
+ fprintf(stderr, "Shade %d, out of range\n",shade);
+ return (-1);
+ }
+ XSetTile(display, TileGC, XShade[shade]);
+ return (1);
+}
+
+int
+XQueryShades(unsigned int *shades)
+{
+ *shades = XShadeMax;
+ return 1;
+}
+
+
+void
+XShadeRectangle(Display *display, Drawable drawable, int x,int y,
+ unsigned int width, unsigned int height)
+{
+ if (!INIT) {
+ fprintf(stderr, "XShade Error: Tried to fill before INIT called\n");
+ exit(-1);
+ }
+ XFillRectangle(display, drawable, TileGC, x, y, width, height);
+}
+
+
+void
+XShadeRectangles(Display *display, Drawable drawable,
+ XRectangle *rectangles, int nrectangles)
+{
+ if (!INIT) {
+ fprintf(stderr, "XShade Error: Tried to fill before INIT called\n");
+ exit(-1);
+ }
+ XFillRectangles(display, drawable, TileGC,
+ rectangles, nrectangles);
+}
+
+
+void
+XShadePolygon(Display *display, Drawable drawable, XPoint * points,
+ int npoints, int shape, int mode)
+{
+ if (!INIT) {
+ fprintf(stderr, "XShade Error: Tried to fill before INIT called\n");
+ exit(-1);
+ }
+
+ XFillPolygon(display, drawable, TileGC,
+ points, npoints, shape, mode);
+}
+
+void
+XShadeArc(Display *display, Drawable drawable, int x, int y,
+ unsigned int width, unsigned int height, int angle1, int angle2)
+{
+ if (!INIT) {
+ fprintf(stderr, "XShade Error: Tried to fill before INIT called\n");
+ exit(-1);
+ }
+ XFillArc(display, drawable, TileGC, x, y, width,
+ height, angle1, angle2);
+}
+
+
+void
+XShadeArcs(Display *display, Drawable drawable, XArc *arcs, int narcs)
+{
+ if (!INIT) {
+ fprintf(stderr, "XShade Error: Tried to fill before INIT called\n");
+ exit(-1);
+ }
+ XFillArcs(display, drawable, TileGC, arcs, narcs);
+}
+
+#endif /* MSYSplatform */
+
+@
+\eject
+\begin{thebibliography}{99}
+\bibitem{1} nothing
+\end{thebibliography}
+\end{document}