Initial revision

11 files changed, 1987 insertions, 0 deletions

diff --git a/progs/xdemos/Makefile.X11 b/progs/xdemos/Makefile.X11
new file mode 100644
index 0000000000..ab5dce418d
--- /dev/null
+++ b/progs/xdemos/Makefile.X11
@@ -0,0 +1,58 @@
+# $Id: Makefile.X11,v 1.1 1999/08/19 00:55:43 jtg Exp $
+
+# Mesa 3-D graphics library
+# Version:  3.1
+# Copyright (C) 1995-1999  Brian Paul
+
+# Makefile for non-GLUT (X11, SVGA, etc) demo programs
+
+
+##### MACROS #####
+
+INCDIR = ../include
+LIBDIR = ../lib
+
+GL_LIBS = -L$(LIBDIR) -lglut -lGLU -lGL -lm $(XLIBS)
+
+LIB_DEP = $(LIBDIR)/$(GL_LIB) $(LIBDIR)/$(GLU_LIB) $(LIBDIR)/$(GLUT_LIB)
+
+PROGS = glxdemo glxpixmap offset xdemo
+
+
+
+##### RULES #####
+
+.SUFFIXES:
+.SUFFIXES: .c
+
+.c: $(LIB_DEP)
+	$(CC) -I$(INCDIR) $(CFLAGS) $< $(GL_LIBS) -o $@
+
+
+
+##### TARGETS #####
+
+default:
+	@echo "Specify a target configuration"
+
+clean:
+	-rm *.o *~
+
+realclean:
+	-rm $(PROGS)
+	-rm *.o *~
+
+targets: $(PROGS)
+
+# execute all programs
+exec: $(PROGS)
+	@for prog in $(PROGS) ;			\
+	do					\
+		echo -n "Running $$prog ..." ;	\
+		$$prog ;			\
+		echo ;				\
+	done
+
+
+include ../Make-config
+
diff --git a/progs/xdemos/descrip.mms b/progs/xdemos/descrip.mms
new file mode 100644
index 0000000000..aa56c1cec3
--- /dev/null
+++ b/progs/xdemos/descrip.mms
@@ -0,0 +1,79 @@
+# Makefile for demo programs for VMS
+# contributed by Jouk Jansen  joukj@crys.chem.uva.nl
+
+
+.first
+	define gl [-.include.gl]
+
+.include [-]mms-config.
+
+##### MACROS #####
+
+INCDIR = [-.include]
+CFLAGS = /include=$(INCDIR)/define=(FBIND=1)
+
+GL_LIBS = [-.lib]libMesaaux/l,libMesatk/l,libMesaGLU/l,libMesaGL/l,$(XLIBS)
+
+LIB_DEP = [-.lib]$(GL_LIB) [-.lib]$(GLU_LIB) [-.lib]$(TK_LIB) [-.lib]$(AUX_LIB)
+
+PROGS = bounce.exe;,gamma.exe;,gears.exe;,glxdemo.exe;,glxpixmap.exe;,\
+	isosurf.exe;,offset.exe;,osdemo.exe;,spin.exe;,test0.exe;,\
+	texobj.exe;,xdemo.exe;,reflect.exe;,winpos.exe;
+
+
+
+##### RULES #####
+
+
+##### TARGETS #####
+default :
+	mms $(PROGS)
+
+clean :
+	delete *.obj;*
+
+realclean :
+	delete $(PROGS)
+	delete *.obj;*
+
+bounce.exe; : bounce.obj $(LIB_DEP)
+	link bounce,$(GL_LIBS)
+	
+gamma.exe; : gamma.obj $(LIB_DEP)
+	link gamma,$(GL_LIBS)
+
+gears.exe; : gears.obj $(LIB_DEP)
+	link gears,$(GL_LIBS)
+
+glxdemo.exe; : glxdemo.obj $(LIB_DEP)
+	link glxdemo,$(GL_LIBS)
+
+glxpixmap.exe; : glxpixmap.obj $(LIB_DEP)
+	link glxpixmap,$(GL_LIBS)
+
+isosurf.exe; : isosurf.obj $(LIB_DEP)
+	link isosurf,$(GL_LIBS)
+
+offset.exe; : offset.obj $(LIB_DEP)
+	link offset,$(GL_LIBS)
+
+osdemo.exe; : osdemo.obj $(LIB_DEP)
+	link osdemo,$(GL_LIBS)
+
+spin.exe; : spin.obj $(LIB_DEP)
+	link spin,$(GL_LIBS)
+
+test0.exe; : test0.obj $(LIB_DEP)
+	link test0,$(GL_LIBS)
+
+texobj.exe; : texobj.obj $(LIB_DEP)
+	link texobj,$(GL_LIBS)
+
+xdemo.exe; : xdemo.obj $(LIB_DEP)
+	link xdemo,$(GL_LIBS)
+
+reflect.exe; : reflect.obj $(LIB_DEP)
+	link reflect,$(GL_LIBS)
+
+winpos.exe; : winpos.obj $(LIB_DEP)
+	link winpos,$(GL_LIBS)
diff --git a/progs/xdemos/glxdemo.c b/progs/xdemos/glxdemo.c
new file mode 100644
index 0000000000..c49cd85140
--- /dev/null
+++ b/progs/xdemos/glxdemo.c
@@ -0,0 +1,136 @@
+/* $Id: glxdemo.c,v 1.1 1999/08/19 00:55:43 jtg Exp $ */
+
+
+/*
+ * A demonstration of using the GLX functions.  This program is in the
+ * public domain.
+ *
+ * Brian Paul
+ */
+
+
+/*
+ * $Log: glxdemo.c,v $
+ * Revision 1.1  1999/08/19 00:55:43  jtg
+ * Initial revision
+ *
+ * Revision 3.0  1998/02/21 02:16:54  brianp
+ * initial rev
+ *
+ */
+
+
+#include <GL/gl.h>
+#include <GL/glx.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+
+
+static void redraw( Display *dpy, Window w )
+{
+   printf("Redraw event\n");
+
+   glClear( GL_COLOR_BUFFER_BIT );
+
+   glColor3f( 1.0, 1.0, 0.0 );
+   glRectf( -0.8, -0.8, 0.8, 0.8 );
+
+   glXSwapBuffers( dpy, w );
+}
+
+
+
+static void resize( unsigned int width, unsigned int height )
+{
+   printf("Resize event\n");
+   glViewport( 0, 0, width, height );
+   glMatrixMode( GL_PROJECTION );
+   glLoadIdentity();
+   glOrtho( -1.0, 1.0, -1.0, 1.0, -1.0, 1.0 );
+}
+
+
+
+static Window make_rgb_db_window( Display *dpy,
+				  unsigned int width, unsigned int height )
+{
+   int attrib[] = { GLX_RGBA,
+		    GLX_RED_SIZE, 1,
+		    GLX_GREEN_SIZE, 1,
+		    GLX_BLUE_SIZE, 1,
+		    GLX_DOUBLEBUFFER,
+		    None };
+   int scrnum;
+   XSetWindowAttributes attr;
+   unsigned long mask;
+   Window root;
+   Window win;
+   GLXContext ctx;
+   XVisualInfo *visinfo;
+
+   scrnum = DefaultScreen( dpy );
+   root = RootWindow( dpy, scrnum );
+
+   visinfo = glXChooseVisual( dpy, scrnum, attrib );
+   if (!visinfo) {
+      printf("Error: couldn't get an RGB, Double-buffered visual\n");
+      exit(1);
+   }
+
+   /* window attributes */
+   attr.background_pixel = 0;
+   attr.border_pixel = 0;
+   attr.colormap = XCreateColormap( dpy, root, visinfo->visual, AllocNone);
+   attr.event_mask = StructureNotifyMask | ExposureMask;
+   mask = CWBackPixel | CWBorderPixel | CWColormap | CWEventMask;
+
+   win = XCreateWindow( dpy, root, 0, 0, width, height,
+		        0, visinfo->depth, InputOutput,
+		        visinfo->visual, mask, &attr );
+
+   ctx = glXCreateContext( dpy, visinfo, NULL, True );
+
+   glXMakeCurrent( dpy, win, ctx );
+
+   return win;
+}
+
+
+static void event_loop( Display *dpy )
+{
+   XEvent event;
+
+   while (1) {
+      XNextEvent( dpy, &event );
+
+      switch (event.type) {
+	 case Expose:
+	    redraw( dpy, event.xany.window );
+	    break;
+	 case ConfigureNotify:
+	    resize( event.xconfigure.width, event.xconfigure.height );
+	    break;
+      }
+   }
+}
+
+
+
+int main( int argc, char *argv[] )
+{
+   Display *dpy;
+   Window win;
+
+   dpy = XOpenDisplay(NULL);
+
+   win = make_rgb_db_window( dpy, 300, 300 );
+
+   glShadeModel( GL_FLAT );
+   glClearColor( 0.5, 0.5, 0.5, 1.0 );
+
+   XMapWindow( dpy, win );
+
+   event_loop( dpy );
+   return 0;
+}
diff --git a/progs/xdemos/glxpixmap.c b/progs/xdemos/glxpixmap.c
new file mode 100644
index 0000000000..e4a62c72d9
--- /dev/null
+++ b/progs/xdemos/glxpixmap.c
@@ -0,0 +1,160 @@
+/* $Id: glxpixmap.c,v 1.1 1999/08/19 00:55:43 jtg Exp $ */
+
+
+/*
+ * A demonstration of using the GLXPixmap functions.  This program is in
+ * the public domain.
+ *
+ * Brian Paul
+ */
+
+
+/*
+ * $Id: glxpixmap.c,v 1.1 1999/08/19 00:55:43 jtg Exp $
+ */
+
+
+#include <GL/gl.h>
+#include <GL/glx.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+
+
+static GLXContext ctx;
+static XVisualInfo *visinfo;
+static GC gc;
+
+
+
+static Window make_rgb_window( Display *dpy,
+				  unsigned int width, unsigned int height )
+{
+   int attrib[] = { GLX_RGBA,
+		    GLX_RED_SIZE, 1,
+		    GLX_GREEN_SIZE, 1,
+		    GLX_BLUE_SIZE, 1,
+		    None };
+   int scrnum;
+   XSetWindowAttributes attr;
+   unsigned long mask;
+   Window root;
+   Window win;
+
+   scrnum = DefaultScreen( dpy );
+   root = RootWindow( dpy, scrnum );
+
+   visinfo = glXChooseVisual( dpy, scrnum, attrib );
+   if (!visinfo) {
+      printf("Error: couldn't get an RGB, Double-buffered visual\n");
+      exit(1);
+   }
+
+   /* window attributes */
+   attr.background_pixel = 0;
+   attr.border_pixel = 0;
+   /* TODO: share root colormap if possible */
+   attr.colormap = XCreateColormap( dpy, root, visinfo->visual, AllocNone);
+   attr.event_mask = StructureNotifyMask | ExposureMask;
+   mask = CWBackPixel | CWBorderPixel | CWColormap | CWEventMask;
+
+   win = XCreateWindow( dpy, root, 0, 0, width, height,
+		        0, visinfo->depth, InputOutput,
+		        visinfo->visual, mask, &attr );
+
+   /* make an X GC so we can do XCopyArea later */
+   gc = XCreateGC( dpy, win, 0, NULL );
+
+   ctx = glXCreateContext( dpy, visinfo, NULL, True );
+
+   return win;
+}
+
+
+static GLXPixmap make_pixmap( Display *dpy, Window win,
+			       unsigned int width, unsigned int height )
+{
+   Pixmap pm;
+   GLXPixmap glxpm;
+   XWindowAttributes attr;
+
+   pm = XCreatePixmap( dpy, win, width, height, visinfo->depth );
+   XGetWindowAttributes( dpy, win, &attr );
+
+   /*
+    * IMPORTANT:
+    *   Use the glXCreateGLXPixmapMESA funtion when using Mesa because
+    *   Mesa needs to know the colormap associated with a pixmap in order
+    *   to render correctly.  This is because Mesa allows RGB rendering
+    *   into any kind of visual, not just TrueColor or DirectColor.
+    */
+#ifdef GLX_MESA_pixmap_colormap
+   glxpm = glXCreateGLXPixmapMESA( dpy, visinfo, pm, attr.colormap );
+#else
+   /* This will work with Mesa too if the visual is TrueColor or DirectColor */
+   glxpm = glXCreateGLXPixmap( dpy, visinfo, pm );
+#endif
+
+   return glxpm;
+}
+
+
+
+static void event_loop( Display *dpy, GLXPixmap pm )
+{
+   XEvent event;
+
+   while (1) {
+      XNextEvent( dpy, &event );
+
+      switch (event.type) {
+	 case Expose:
+	    printf("Redraw\n");
+	    /* copy the image from GLXPixmap to window */
+	    XCopyArea( dpy, pm, event.xany.window,  /* src, dest */
+		       gc, 0, 0, 300, 300,          /* gc, src pos, size */
+		       0, 0 );                      /* dest pos */
+	    break;
+	 case ConfigureNotify:
+	    /* nothing */
+	    break;
+      }
+   }
+}
+
+
+
+int main( int argc, char *argv[] )
+{
+   Display *dpy;
+   Window win;
+   GLXPixmap pm;
+
+   dpy = XOpenDisplay(NULL);
+
+   win = make_rgb_window( dpy, 300, 300 );
+   pm = make_pixmap( dpy, win, 300, 300 );
+
+#ifdef JUNK
+   glXMakeCurrent( dpy, win, ctx );  /*to make sure ctx is properly initialized*/
+#endif
+
+   glXMakeCurrent( dpy, pm, ctx );
+
+   /* Render an image into the pixmap */
+   glShadeModel( GL_FLAT );
+   glClearColor( 0.5, 0.5, 0.5, 1.0 );
+   glClear( GL_COLOR_BUFFER_BIT );
+   glViewport( 0, 0, 300, 300 );
+   glOrtho( -1.0, 1.0, -1.0, 1.0, -1.0, 1.0 );
+   glColor3f( 0.0, 1.0, 1.0 );
+   glRectf( -0.75, -0.75, 0.75, 0.75 );
+   glFlush();
+
+   /* when a redraw is needed we'll just copy the pixmap image to the window */
+
+   XMapWindow( dpy, win );
+
+   event_loop( dpy, pm );
+   return 0;
+}
diff --git a/progs/xdemos/offset.c b/progs/xdemos/offset.c
new file mode 100644
index 0000000000..158e52a97c
--- /dev/null
+++ b/progs/xdemos/offset.c
@@ -0,0 +1,323 @@
+/****************************************************************************
+Copyright 1995 by Silicon Graphics Incorporated, Mountain View, California.
+
+                        All Rights Reserved
+
+Permission to use, copy, modify, and distribute this software and its 
+documentation for any purpose and without fee is hereby granted, 
+provided that the above copyright notice appear in all copies and that
+both that copyright notice and this permission notice appear in 
+supporting documentation, and that the name of Silicon Graphics not be
+used in advertising or publicity pertaining to distribution of the
+software without specific, written prior permission.  
+
+SILICON GRAPHICS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+EVENT SHALL SILICON GRAPHICS 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
+PERFORMANCE OF THIS SOFTWARE.
+
+****************************************************************************/
+
+/*
+ * Derived from code written by Kurt Akeley, November 1992
+ *
+ *	Uses PolygonOffset to draw hidden-line images.  PolygonOffset
+ *	    shifts the z values of polygons an amount that is
+ *	    proportional to their slope in screen z.  This keeps
+ *	    the lines, which are drawn without displacement, from
+ *	    interacting with their respective polygons, and
+ *	    thus eliminates line dropouts.
+ *
+ *	The left image shows an ordinary antialiased wireframe image.
+ *	The center image shows an antialiased hidden-line image without
+ *	    PolygonOffset.
+ *	The right image shows an antialiased hidden-line image using
+ *	    PolygonOffset to reduce artifacts.
+ *
+ *	Drag with a mouse button pressed to rotate the models.
+ *	Press the escape key to exit.
+ */
+
+/*
+ * Modified for OpenGL 1.1 glPolygonOffset() conventions
+ */
+
+
+#include <GL/glx.h>
+#include <GL/glu.h>
+#include <X11/keysym.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+
+/*#undef GL_EXT_polygon_offset   uncomment to use new version*/
+
+
+#ifndef EXIT_FAILURE
+#  define EXIT_FAILURE    1
+#endif
+#ifndef EXIT_SUCCESS
+#  define EXIT_SUCCESS    0
+#endif
+
+#define MAXQUAD 6
+
+typedef float Vertex[3];
+
+typedef Vertex Quad[4];
+
+/* data to define the six faces of a unit cube */
+Quad quads[MAXQUAD] = {
+   { {0,0,0}, {1,0,0}, {1,1,0}, {0,1,0} },
+   { {0,0,1}, {1,0,1}, {1,1,1}, {0,1,1} },
+   { {0,0,0}, {1,0,0}, {1,0,1}, {0,0,1} },
+   { {0,1,0}, {1,1,0}, {1,1,1}, {0,1,1} },
+   { {0,0,0}, {0,0,1}, {0,1,1}, {0,1,0} },
+   { {1,0,0}, {1,0,1}, {1,1,1}, {1,1,0} }
+};
+
+#define WIREFRAME	0
+#define HIDDEN_LINE	1
+
+static void error(const char* prog, const char* msg);
+static void cubes(int mx, int my, int mode);
+static void fill(Quad quad);
+static void outline(Quad quad);
+static void draw_hidden(Quad quad, int mode);
+static void process_input(Display *dpy, Window win);
+static int query_extension(char* extName);
+
+static int attributeList[] = { GLX_RGBA, GLX_RED_SIZE, 1, GLX_GREEN_SIZE, 1,
+    GLX_BLUE_SIZE, 1, GLX_DOUBLEBUFFER, GLX_DEPTH_SIZE, 1, None };
+
+static int dimension = 3;
+
+int main(int argc, char** argv) {
+    Display *dpy;
+    XVisualInfo *vi;
+    XSetWindowAttributes swa;
+    Window win;
+    GLXContext cx;
+
+    dpy = XOpenDisplay(0);
+    if (!dpy) error(argv[0], "can't open display");
+
+    vi = glXChooseVisual(dpy, DefaultScreen(dpy), attributeList);
+    if (!vi) error(argv[0], "no suitable visual");
+
+    cx = glXCreateContext(dpy, vi, 0, GL_TRUE);
+
+    swa.colormap = XCreateColormap(dpy, RootWindow(dpy, vi->screen),
+                                   vi->visual, AllocNone);
+
+    swa.border_pixel = 0;
+    swa.event_mask = ExposureMask | StructureNotifyMask | KeyPressMask |
+	ButtonPressMask | ButtonMotionMask;
+    win = XCreateWindow(dpy, RootWindow(dpy, vi->screen), 0, 0, 900, 300,
+			0, vi->depth, InputOutput, vi->visual,
+			CWBorderPixel|CWColormap|CWEventMask, &swa);
+    XStoreName(dpy, win, "hiddenline");
+    XMapWindow(dpy, win);
+
+    glXMakeCurrent(dpy, win, cx);
+
+    /* check for the polygon offset extension */
+#ifndef GL_VERSION_1_1
+    if (!query_extension("GL_EXT_polygon_offset"))
+        error(argv[0], "polygon_offset extension is not available");
+#else
+   (void) query_extension;
+#endif
+
+    /* set up viewing parameters */
+    glMatrixMode(GL_PROJECTION);
+    gluPerspective(20, 1, 0.1, 20);
+    glMatrixMode(GL_MODELVIEW);
+    glTranslatef(0, 0, -15);
+
+    /* set other relevant state information */
+    glEnable(GL_DEPTH_TEST);
+
+#ifdef GL_EXT_polygon_offset
+    printf("using 1.0 offset extension\n");
+    glPolygonOffsetEXT( 1.0, 0.00001 );
+#else
+    printf("using 1.1 offset\n");
+    glPolygonOffset( 1.0, 0.5 );
+#endif
+
+    glShadeModel( GL_FLAT );
+    glDisable( GL_DITHER );
+
+    /* process events until the user presses ESC */
+    while (1) process_input(dpy, win);
+
+    return 0;
+}
+
+static void
+draw_scene(int mx, int my) {
+    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
+    glPushMatrix();
+    glTranslatef(-1.7, 0.0, 0.0);
+    cubes(mx, my, WIREFRAME);
+    glPopMatrix();
+
+    glPushMatrix();
+    cubes(mx, my, HIDDEN_LINE);
+    glPopMatrix();
+
+    glPushMatrix();
+    glTranslatef(1.7, 0.0, 0.0);
+#ifdef GL_EXT_polygon_offset
+    glEnable(GL_POLYGON_OFFSET_EXT);
+#else
+    glEnable(GL_POLYGON_OFFSET_FILL);
+#endif
+    cubes(mx, my, HIDDEN_LINE);
+#ifdef GL_EXT_polygon_offset
+    glDisable(GL_POLYGON_OFFSET_EXT);
+#else
+    glDisable(GL_POLYGON_OFFSET_FILL);
+#endif
+    glPopMatrix();
+}
+
+
+static void
+cubes(int mx, int my, int mode) {
+    int x, y, z, i;
+
+    /* track the mouse */
+    glRotatef(mx / 2.0, 0, 1, 0);
+    glRotatef(my / 2.0, 1, 0, 0);
+
+    /* draw the lines as hidden polygons */
+    glTranslatef(-0.5, -0.5, -0.5);
+    glScalef(1.0/dimension, 1.0/dimension, 1.0/dimension);
+    for (z = 0; z < dimension; z++) {
+	for (y = 0; y < dimension; y++) {
+	    for (x = 0; x < dimension; x++) {
+		glPushMatrix();
+		glTranslatef(x, y, z);
+		glScalef(0.8, 0.8, 0.8);
+		for (i = 0; i < MAXQUAD; i++)
+		    draw_hidden(quads[i], mode);
+		glPopMatrix();
+	    }
+	}
+    }
+}
+
+static void
+fill(Quad quad) {
+    /* draw a filled polygon */
+    glBegin(GL_QUADS);
+    glVertex3fv(quad[0]);
+    glVertex3fv(quad[1]);
+    glVertex3fv(quad[2]);
+    glVertex3fv(quad[3]);
+    glEnd();
+}
+
+static void
+outline(Quad quad) {
+    /* draw an outlined polygon */
+    glBegin(GL_LINE_LOOP);
+    glVertex3fv(quad[0]);
+    glVertex3fv(quad[1]);
+    glVertex3fv(quad[2]);
+    glVertex3fv(quad[3]);
+    glEnd();
+}
+
+static void
+draw_hidden(Quad quad, int mode) {
+    if (mode == HIDDEN_LINE) {
+	glColor3f(0, 0, 0);
+	fill(quad);
+    }
+
+    /* draw the outline using white, optionally fill the interior with black */
+    glColor3f(1, 1, 1);
+    outline(quad);
+}
+
+static void
+process_input(Display *dpy, Window win) {
+    XEvent event;
+    static int prevx, prevy;
+    static int deltax = 90, deltay = 40;
+
+    do {
+	char buf[31];
+	KeySym keysym;
+
+	XNextEvent(dpy, &event);
+	switch(event.type) {
+	case Expose:
+	    break;
+	case ConfigureNotify: {
+	    /* this approach preserves a 1:1 viewport aspect ratio */
+	    int vX, vY, vW, vH;
+	    int eW = event.xconfigure.width, eH = event.xconfigure.height;
+	    if (eW >= eH) {
+		vX = 0;
+		vY = (eH - eW) >> 1;
+		vW = vH = eW;
+	    } else {
+		vX = (eW - eH) >> 1;
+		vY = 0;
+		vW = vH = eH;
+	    }
+	    glViewport(vX, vY, vW, vH);
+	    }
+	    break;
+	case KeyPress:
+	    (void) XLookupString(&event.xkey, buf, sizeof(buf), &keysym, NULL);
+	    switch (keysym) {
+	    case XK_Escape:
+		exit(EXIT_SUCCESS);
+	    default:
+		break;
+	    }
+	case ButtonPress:
+	    prevx = event.xbutton.x;
+	    prevy = event.xbutton.y;
+	    break;
+	case MotionNotify:
+	    deltax += (event.xbutton.x - prevx); prevx = event.xbutton.x;
+	    deltay += (event.xbutton.y - prevy); prevy = event.xbutton.y;
+	    break;
+	default:
+	    break;
+	}
+    } while (XPending(dpy));
+
+    draw_scene(deltax, deltay);
+    glXSwapBuffers(dpy, win);
+}
+
+static void
+error(const char *prog, const char *msg) {
+    fprintf(stderr, "%s: %s\n", prog, msg);
+    exit(EXIT_FAILURE);
+}
+
+static int
+query_extension(char* extName) {
+    char *p = (char *) glGetString(GL_EXTENSIONS);
+    char *end = p + strlen(p);
+    while (p < end) {
+        int n = strcspn(p, " ");
+        if ((strlen(extName) == n) && (strncmp(extName, p, n) == 0))
+            return GL_TRUE;
+        p += (n + 1);
+    }
+    return GL_FALSE;
+}
+
diff --git a/progs/xdemos/shape.c b/progs/xdemos/shape.c
new file mode 100644
index 0000000000..94b9b1f26a
--- /dev/null
+++ b/progs/xdemos/shape.c
@@ -0,0 +1,305 @@
+/* $Id: shape.c,v 1.1 1999/08/19 00:55:43 jtg Exp $ */
+
+/*
+ * Example of using the X "shape" extension with OpenGL:  render a spinning
+ * cube inside of a non-rectangular window.
+ *
+ * Press ESC to exit.  Press up/down to change window shape.
+ *
+ * To compile add "shape" to the PROGS list in Makefile.
+ *
+ * Brian Paul
+ * June 16, 1997
+ *
+ * This program is in the public domain.
+ */
+
+
+#include <math.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <X11/Xlib.h>
+#include <X11/Xutil.h>
+#include <X11/keysym.h>
+#include <X11/extensions/shape.h>
+#include <GL/glx.h>
+
+#ifndef PI
+#define PI 3.1415926
+#endif
+
+
+static int Width=500, Height=500;
+
+static float Xangle = 0.0, Yangle = 0.0;
+static int Redraw = 0;
+static int Sides = 5;
+static int MinSides = 3;
+static int MaxSides = 20;
+
+
+/*
+ * Draw the OpenGL stuff and do a SwapBuffers.
+ */
+static void display(Display *dpy, Window win)
+{
+   float scale = 1.7;
+
+   glClear(GL_COLOR_BUFFER_BIT);
+
+   glPushMatrix();
+
+   glScalef(scale, scale, scale);
+   glRotatef(Xangle, 1.0, 0.0, 0.0);
+   glRotatef(Yangle, 0.0, 1.0, 0.0);
+
+   glColor3f(1.0, 1.0, 1.0);
+   glBegin(GL_LINE_LOOP);
+   glVertex3f(-1.0, -1.0, -1.0);
+   glVertex3f( 1.0, -1.0, -1.0);
+   glVertex3f( 1.0,  1.0, -1.0);
+   glVertex3f(-1.0,  1.0, -1.0);
+   glEnd();
+
+   glBegin(GL_LINE_LOOP);
+   glVertex3f(-1.0, -1.0, 1.0);
+   glVertex3f( 1.0, -1.0, 1.0);
+   glVertex3f( 1.0,  1.0, 1.0);
+   glVertex3f(-1.0,  1.0, 1.0);
+   glEnd();
+
+   glBegin(GL_LINES);
+   glVertex3f(-1.0, -1.0, -1.0);   glVertex3f(-1.0, -1.0, 1.0);
+   glVertex3f( 1.0, -1.0, -1.0);   glVertex3f( 1.0, -1.0, 1.0);
+   glVertex3f( 1.0,  1.0, -1.0);   glVertex3f( 1.0,  1.0, 1.0);
+   glVertex3f(-1.0,  1.0, -1.0);   glVertex3f(-1.0,  1.0, 1.0);
+   glEnd();
+
+   glPopMatrix();
+
+   glXSwapBuffers(dpy, win);
+}
+
+
+/*
+ * Called when no events are pending.
+ */
+static void idle(void)
+{
+   Xangle += 2.0;
+   Yangle += 3.3;
+   Redraw = 1;
+}
+
+
+/*
+ * This is called when we have to recompute the window shape bitmask.
+ * We just generate an n-sided regular polygon here but any other shape
+ * would be possible.
+ */
+static void make_shape_mask(Display *dpy, Window win, int width, int height,
+                            int sides)
+{
+   Pixmap shapeMask;
+   XGCValues xgcv;
+   GC gc;
+
+   /* allocate 1-bit deep pixmap and a GC */
+   shapeMask = XCreatePixmap(dpy, win, width, height, 1);
+   gc = XCreateGC(dpy, shapeMask, 0, &xgcv);
+
+   /* clear shapeMask to zeros */
+   XSetForeground(dpy, gc, 0);
+   XFillRectangle(dpy, shapeMask, gc, 0, 0, width, height);
+
+   /* draw mask */
+   XSetForeground(dpy, gc, 1);
+   {
+      int cx = width / 2;
+      int cy = height / 2;
+      float angle = 0.0;
+      float step = 2.0 * PI / sides;
+      float radius = width / 2;
+      int i;
+      XPoint points[100];
+      for (i=0;i<sides;i++) {
+         int x = cx + radius * sin(angle);
+         int y = cy - radius * cos(angle);
+         points[i].x = x;
+         points[i].y = y;
+         angle += step;
+      }
+      XFillPolygon(dpy, shapeMask, gc, points, sides, Convex, CoordModeOrigin);
+   }
+
+   /* This is the only SHAPE extension call- simple! */
+   XShapeCombineMask(dpy, win, ShapeBounding, 0, 0, shapeMask, ShapeSet);
+
+   XFreeGC(dpy, gc);
+   XFreePixmap(dpy, shapeMask);
+}
+
+
+/*
+ * Called when window is resized.  Do OpenGL viewport and projection stuff.
+ */
+static void reshape(int width, int height)
+{
+   glViewport(0, 0, width, height);
+   glMatrixMode(GL_PROJECTION);
+   glLoadIdentity();
+   glFrustum(-1.0, 1.0, -1.0, 1.0, 3.0, 20.0);
+   glMatrixMode(GL_MODELVIEW);
+   glLoadIdentity();
+   glTranslatef(0.0, 0.0, -10.0);
+}
+
+
+/*
+ * Process X events.
+ */
+static void event_loop(Display *dpy, Window win)
+{
+   while (1) {
+      XEvent event;
+      if (XPending(dpy)) {
+         XNextEvent(dpy, &event);
+         switch (event.type) {
+            case Expose:
+               display(dpy, event.xexpose.window);
+               break;
+            case ConfigureNotify:
+               Width = event.xconfigure.width;
+               Height = event.xconfigure.height,
+               make_shape_mask(dpy, win, Width, Height, Sides);
+               reshape(Width, Height);
+               break;
+            case KeyPress:
+               {
+                  char buf[100];
+                  KeySym keySym;
+                  XComposeStatus stat;
+                  XLookupString(&event.xkey, buf, sizeof(buf), &keySym, &stat);
+                  switch (keySym) {
+                     case XK_Escape:
+                        exit(0);
+                        break;
+                     case XK_Up:
+                        Sides++;
+                        if (Sides>MaxSides) Sides = MaxSides;
+                        make_shape_mask(dpy, win, Width, Height, Sides);
+                        break;
+                     case XK_Down:
+                        Sides--;
+                        if (Sides<MinSides) Sides = MinSides;
+                        make_shape_mask(dpy, win, Width, Height, Sides);
+                        break;
+                  }
+               }
+               break;
+            default:
+               ;;
+         }
+      }
+      else {
+         idle();
+         if (Redraw) {
+            display(dpy, win);
+            Redraw = 0;
+         }
+      }
+   }
+}
+
+
+/*
+ * Allocate a "nice" colormap.  This could be better (HP-CR support, etc).
+ */
+static Colormap alloc_colormap(Display *dpy, Window parent, Visual *vis)
+{
+   Screen *scr = DefaultScreenOfDisplay(dpy);
+   int scrnum = DefaultScreen(dpy);
+
+   if (MaxCmapsOfScreen(scr)==1 && vis==DefaultVisual(dpy, scrnum)) {
+      /* The window and root are of the same visual type so */
+      /* share the root colormap. */
+      return DefaultColormap(dpy, scrnum);
+   }
+   else {
+      return XCreateColormap(dpy, parent, vis, AllocNone);
+   }
+}
+
+
+int main(int argc, char *argv[])
+{
+   static int glAttribs[] = {
+      GLX_DOUBLEBUFFER,
+      GLX_RGBA,
+      GLX_DEPTH_SIZE, 1,
+      None
+   };
+   Display *dpy;
+   XVisualInfo *visInfo;
+   int scrn;
+   Window root;
+   Colormap cmap;
+   Window win;
+   XSetWindowAttributes winAttribs;
+   unsigned long winAttribsMask;
+   GLXContext glCtx;
+   int ignore;
+
+   dpy = XOpenDisplay(NULL);
+   if (!dpy) {
+      fprintf(stderr, "Couldn't open default display\n");
+      return 1;
+   }
+
+   /* check that we can use the shape extension */
+   if (!XQueryExtension(dpy, "SHAPE", &ignore, &ignore, &ignore )) {
+      fprintf(stderr, "Display doesn't support shape extension\n");
+      return 1;
+   }
+
+   scrn = DefaultScreen(dpy);
+
+   root = RootWindow(dpy, scrn);
+
+   visInfo = glXChooseVisual(dpy, scrn, glAttribs);
+   if (!visInfo) {
+      fprintf(stderr, "Couldn't get RGB, DB, Z visual\n");
+      return 1;
+   }
+
+   glCtx = glXCreateContext(dpy, visInfo, 0, True);
+   if (!glCtx) {
+      fprintf(stderr, "Couldn't create GL context\n");
+      return 1;
+   }
+
+   cmap = alloc_colormap(dpy, root, visInfo->visual);
+   if (!cmap) {
+      fprintf(stderr, "Couln't create colormap\n");
+      return 1;
+   }
+
+   winAttribs.border_pixel = 0;
+   winAttribs.colormap = cmap;
+   winAttribs.event_mask = StructureNotifyMask | ExposureMask | KeyPressMask;
+   winAttribsMask = CWBorderPixel | CWColormap | CWEventMask;
+   win = XCreateWindow(dpy, root, 0, 0, Width, Height, 0,
+                       visInfo->depth, InputOutput,
+                       visInfo->visual,
+                       winAttribsMask, &winAttribs);
+   XMapWindow(dpy, win);
+
+   glXMakeCurrent(dpy, win, glCtx);
+
+   printf("Press ESC to exit.\n");
+   printf("Press up/down to change window shape.\n");
+
+   event_loop(dpy, win);
+
+   return 0;
+}
diff --git a/progs/xdemos/vgears.c b/progs/xdemos/vgears.c
new file mode 100644
index 0000000000..13d030a8be
--- /dev/null
+++ b/progs/xdemos/vgears.c
@@ -0,0 +1,282 @@
+/* $ID$ */
+
+/*
+ * Spinning gears demo for Linux SVGA/Mesa interface in 32K color mode.
+ *
+ * Compile with:  gcc vgears.c -I../include -L../lib -lMesaGL -lX11 -lXext
+ *   -lvga -lm -o vgears
+ *
+ * This program is in the public domain.
+ * Brian Paul, January 1996
+ */
+
+
+#include <vga.h>
+#include <math.h>
+#include "GL/svgamesa.h"
+#include "GL/gl.h"
+
+
+int width = 800, height = 600;
+
+SVGAMesaContext vmc;
+
+
+
+/*
+ * Draw a gear wheel.  You'll probably want to call this function when
+ * building a display list since we do a lot of trig here.
+ *
+ * Input:  inner_radius - radius of hole at center
+ *         outer_radius - radius at center of teeth
+ *         width - width of gear
+ *         teeth - number of teeth
+ *         tooth_depth - depth of tooth
+ */
+static void gear( GLfloat inner_radius, GLfloat outer_radius, GLfloat width,
+		  GLint teeth, GLfloat tooth_depth )
+{
+   GLint i;
+   GLfloat r0, r1, r2;
+   GLfloat angle, da;
+   GLfloat u, v, len;
+
+   r0 = inner_radius;
+   r1 = outer_radius - tooth_depth/2.0;
+   r2 = outer_radius + tooth_depth/2.0;
+
+   da = 2.0*M_PI / teeth / 4.0;
+
+   glShadeModel( GL_FLAT );
+
+   glNormal3f( 0.0, 0.0, 1.0 );
+
+   /* draw front face */
+   glBegin( GL_QUAD_STRIP );
+   for (i=0;i<=teeth;i++) {
+      angle = i * 2.0*M_PI / teeth;
+      glVertex3f( r0*cos(angle), r0*sin(angle), width*0.5 );
+      glVertex3f( r1*cos(angle), r1*sin(angle), width*0.5 );
+      glVertex3f( r0*cos(angle), r0*sin(angle), width*0.5 );
+      glVertex3f( r1*cos(angle+3*da), r1*sin(angle+3*da), width*0.5 );
+   }
+   glEnd();
+
+   /* draw front sides of teeth */
+   glBegin( GL_QUADS );
+   da = 2.0*M_PI / teeth / 4.0;
+   for (i=0;i<teeth;i++) {
+      angle = i * 2.0*M_PI / teeth;
+
+      glVertex3f( r1*cos(angle),      r1*sin(angle),      width*0.5 );
+      glVertex3f( r2*cos(angle+da),   r2*sin(angle+da),   width*0.5 );
+      glVertex3f( r2*cos(angle+2*da), r2*sin(angle+2*da), width*0.5 );
+      glVertex3f( r1*cos(angle+3*da), r1*sin(angle+3*da), width*0.5 );
+   }
+   glEnd();
+
+
+   glNormal3f( 0.0, 0.0, -1.0 );
+
+   /* draw back face */
+   glBegin( GL_QUAD_STRIP );
+   for (i=0;i<=teeth;i++) {
+      angle = i * 2.0*M_PI / teeth;
+      glVertex3f( r1*cos(angle), r1*sin(angle), -width*0.5 );
+      glVertex3f( r0*cos(angle), r0*sin(angle), -width*0.5 );
+      glVertex3f( r1*cos(angle+3*da), r1*sin(angle+3*da), -width*0.5 );
+      glVertex3f( r0*cos(angle), r0*sin(angle), -width*0.5 );
+   }
+   glEnd();
+
+   /* draw back sides of teeth */
+   glBegin( GL_QUADS );
+   da = 2.0*M_PI / teeth / 4.0;
+   for (i=0;i<teeth;i++) {
+      angle = i * 2.0*M_PI / teeth;
+
+      glVertex3f( r1*cos(angle+3*da), r1*sin(angle+3*da), -width*0.5 );
+      glVertex3f( r2*cos(angle+2*da), r2*sin(angle+2*da), -width*0.5 );
+      glVertex3f( r2*cos(angle+da),   r2*sin(angle+da),   -width*0.5 );
+      glVertex3f( r1*cos(angle),      r1*sin(angle),      -width*0.5 );
+   }
+   glEnd();
+
+
+   /* draw outward faces of teeth */
+   glBegin( GL_QUAD_STRIP );
+   for (i=0;i<teeth;i++) {
+      angle = i * 2.0*M_PI / teeth;
+
+      glVertex3f( r1*cos(angle),      r1*sin(angle),       width*0.5 );
+      glVertex3f( r1*cos(angle),      r1*sin(angle),      -width*0.5 );
+      u = r2*cos(angle+da) - r1*cos(angle);
+      v = r2*sin(angle+da) - r1*sin(angle);
+      len = sqrt( u*u + v*v );
+      u /= len;
+      v /= len;
+      glNormal3f( v, -u, 0.0 );
+      glVertex3f( r2*cos(angle+da),   r2*sin(angle+da),    width*0.5 );
+      glVertex3f( r2*cos(angle+da),   r2*sin(angle+da),   -width*0.5 );
+      glNormal3f( cos(angle), sin(angle), 0.0 );
+      glVertex3f( r2*cos(angle+2*da), r2*sin(angle+2*da),  width*0.5 );
+      glVertex3f( r2*cos(angle+2*da), r2*sin(angle+2*da), -width*0.5 );
+      u = r1*cos(angle+3*da) - r2*cos(angle+2*da);
+      v = r1*sin(angle+3*da) - r2*sin(angle+2*da);
+      glNormal3f( v, -u, 0.0 );
+      glVertex3f( r1*cos(angle+3*da), r1*sin(angle+3*da),  width*0.5 );
+      glVertex3f( r1*cos(angle+3*da), r1*sin(angle+3*da), -width*0.5 );
+      glNormal3f( cos(angle), sin(angle), 0.0 );
+   }
+
+   glVertex3f( r1*cos(0), r1*sin(0), width*0.5 );
+   glVertex3f( r1*cos(0), r1*sin(0), -width*0.5 );
+
+   glEnd();
+
+
+   glShadeModel( GL_SMOOTH );
+
+   /* draw inside radius cylinder */
+   glBegin( GL_QUAD_STRIP );
+   for (i=0;i<=teeth;i++) {
+      angle = i * 2.0*M_PI / teeth;
+      glNormal3f( -cos(angle), -sin(angle), 0.0 );
+      glVertex3f( r0*cos(angle), r0*sin(angle), -width*0.5 );
+      glVertex3f( r0*cos(angle), r0*sin(angle), width*0.5 );
+   }
+   glEnd();
+      
+}
+
+
+static GLfloat view_rotx=20.0, view_roty=30.0, view_rotz=0.0;
+static GLint gear1, gear2, gear3;
+static GLfloat angle = 0.0;
+
+static GLuint limit;
+static GLuint count = 1;
+
+
+static void draw( void )
+{
+   angle += 2.0;
+
+   glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
+
+   glPushMatrix();
+   glRotatef( view_rotx, 1.0, 0.0, 0.0 );
+   glRotatef( view_roty, 0.0, 1.0, 0.0 );
+   glRotatef( view_rotz, 0.0, 0.0, 1.0 );
+
+   glPushMatrix();
+   glTranslatef( -3.0, -2.0, 0.0 );
+   glRotatef( angle, 0.0, 0.0, 1.0 );
+   glCallList(gear1);
+   glPopMatrix();
+
+   glPushMatrix();
+   glTranslatef( 3.1, -2.0, 0.0 );
+   glRotatef( -2.0*angle-9.0, 0.0, 0.0, 1.0 );
+   glCallList(gear2);
+   glPopMatrix();
+
+   glPushMatrix();
+   glTranslatef( -3.1, 4.2, 0.0 );
+   glRotatef( -2.0*angle-25.0, 0.0, 0.0, 1.0 );
+   glCallList(gear3);
+   glPopMatrix();
+
+   glPopMatrix();
+
+   SVGAMesaSwapBuffers();
+}
+
+
+static void init( void )
+{
+   static GLfloat pos[4] = {5.0, 5.0, 10.0, 1.0 };
+   static GLfloat red[4] = {0.8, 0.1, 0.0, 1.0 };
+   static GLfloat green[4] = {0.0, 0.8, 0.2, 1.0 };
+   static GLfloat blue[4] = {0.2, 0.2, 1.0, 1.0 };
+
+   GLfloat w = (float) width / (float) height;
+   GLfloat h = 1.0;
+
+   glLightfv( GL_LIGHT0, GL_POSITION, pos );
+   glEnable( GL_CULL_FACE );
+   glEnable( GL_LIGHTING );
+   glEnable( GL_LIGHT0 );
+   glEnable( GL_DEPTH_TEST );
+
+   /* make the gears */
+   gear1 = glGenLists(1);
+   glNewList(gear1, GL_COMPILE);
+   glMaterialfv( GL_FRONT, GL_AMBIENT_AND_DIFFUSE, red );
+   gear( 1.0, 4.0, 1.0, 20, 0.7 );
+   glEndList();
+
+   gear2 = glGenLists(1);
+   glNewList(gear2, GL_COMPILE);
+   glMaterialfv( GL_FRONT, GL_AMBIENT_AND_DIFFUSE, green );
+   gear( 0.5, 2.0, 2.0, 10, 0.7 );
+   glEndList();
+
+   gear3 = glGenLists(1);
+   glNewList(gear3, GL_COMPILE);
+   glMaterialfv( GL_FRONT, GL_AMBIENT_AND_DIFFUSE, blue );
+   gear( 1.3, 2.0, 0.5, 10, 0.7 );
+   glEndList();
+
+   glEnable( GL_NORMALIZE );
+
+
+   glViewport( 0, 0, width, height );
+   glMatrixMode(GL_PROJECTION);
+   glLoadIdentity();
+   if (width>height) {
+      GLfloat w = (GLfloat) width / (GLfloat) height;
+      glFrustum( -w, w, -1.0, 1.0, 5.0, 60.0 );
+   }
+   else {
+      GLfloat h = (GLfloat) height / (GLfloat) width;
+      glFrustum( -1.0, 1.0, -h, h, 5.0, 60.0 );
+   }
+
+   glMatrixMode(GL_MODELVIEW);
+   glLoadIdentity();
+   glTranslatef( 0.0, 0.0, -40.0 );
+}
+
+void setup( void )
+{
+   vga_init();
+
+   vga_setmode(G800x600x32K);
+/*   gl_setcontextvga(G800x600x32K);*/
+
+   vmc = SVGAMesaCreateContext(GL_TRUE);
+   SVGAMesaMakeCurrent( vmc );
+}
+
+
+void end( void )
+{
+   SVGAMesaDestroyContext( vmc );
+
+   vga_setmode( TEXT );
+}
+
+
+int main( int argc, char *argv[] )
+{
+   int i;
+
+   setup();
+   init();
+   for (i=0;i<4;i++) {
+      draw(); /*SVGAMesaSwapBuffers();*/
+   }
+   end();
+   return 0;
+}
diff --git a/progs/xdemos/vindex.c b/progs/xdemos/vindex.c
new file mode 100644
index 0000000000..f9e3192f38
--- /dev/null
+++ b/progs/xdemos/vindex.c
@@ -0,0 +1,66 @@
+/* $Id: vindex.c,v 1.1 1999/08/19 00:55:43 jtg Exp $ */
+
+/*
+ * Test Linux 8-bit SVGA/Mesa color index mode
+ *
+ * Compile with:  gcc vindex.c -I../include -L../lib -lMesaGL -lX11 -lXext
+ *   -lvga -lm -o vindex
+ *
+ * This program is in the public domain.
+ * Brian Paul, January 1996
+ */
+
+
+
+#include <vga.h>
+#include "GL/svgamesa.h"
+#include "GL/gl.h"
+
+
+
+static GLint width = 640, height = 480;
+
+
+
+static void display( void )
+{
+   int i, j;
+   int w, h;
+
+   glViewport( 0, 0, width, height );
+   glMatrixMode( GL_PROJECTION );
+   glLoadIdentity();
+   glOrtho( 0.0, (GLfloat) width, 0.0, (GLfloat) height, -1.0, 1.0 );
+
+   glClear( GL_COLOR_BUFFER_BIT );
+
+   w = width / 16;
+   h = height / 16;
+   for (i=0;i<16;i++) {
+      for (j=0;j<16;j++) {
+         glIndexi( i*16+j );
+         glRecti( i*w, j*h, i*w+w, j*h+h );
+      }
+   }
+}
+
+
+
+int main( int argc, char *argv[] )
+{
+   SVGAMesaContext vmc;
+   int i;
+
+   vga_init();
+   vga_setmode( G640x480x256 );
+
+   vmc = SVGAMesaCreateContext( GL_FALSE );
+   SVGAMesaMakeCurrent( vmc );
+
+   display();
+   sleep(3);
+
+   SVGAMesaDestroyContext( vmc );
+   vga_setmode( TEXT );
+   return 0;
+}
diff --git a/progs/xdemos/vtest.c b/progs/xdemos/vtest.c
new file mode 100644
index 0000000000..f0900b6ed6
--- /dev/null
+++ b/progs/xdemos/vtest.c
@@ -0,0 +1,83 @@
+/* $Id: vtest.c,v 1.1 1999/08/19 00:55:43 jtg Exp $ */
+
+/*
+ * Test SVGA/Mesa interface in 32K color mode.
+ *
+ * Compile with:  gcc vtest.c -I../include -L../lib -lMesaGL -lX11 -lXext
+ *   -lvga -lm -o vtest
+ *
+ * This program is in the public domain.
+ * Brian Paul, January 1996
+ */
+
+
+
+#include <vga.h>
+#include "GL/svgamesa.h"
+#include "GL/gl.h"
+
+
+SVGAMesaContext vmc;
+
+
+
+void setup( void )
+{
+   vga_init();
+
+   vga_setmode(G800x600x32K);
+/*   gl_setcontextvga(G800x600x32K);*/
+
+   vmc = SVGAMesaCreateContext( GL_FALSE );  /* single buffered */
+   SVGAMesaMakeCurrent( vmc );
+}
+
+
+void test( void )
+{
+   glMatrixMode(GL_PROJECTION);
+   glLoadIdentity();
+   glOrtho( -1.0, 1.0, -1.0, 1.0, -1.0, 1.0 );
+   glMatrixMode(GL_MODELVIEW);
+
+   glClear( GL_COLOR_BUFFER_BIT );
+
+   glBegin( GL_LINES );
+   glColor3f( 1.0, 0.0, 0.0 );
+   glVertex2f( -0.5, 0.5 );
+   glVertex2f(  0.5, 0.5 );
+   glColor3f( 0.0, 1.0, 0.0 );
+   glVertex2f( -0.5, 0.25 );
+   glVertex2f(  0.5, 0.25 );
+   glColor3f( 0.0, 0.0, 1.0 );
+   glVertex2f( -0.5, 0.0 );
+   glVertex2f(  0.5, 0.0 );
+   glEnd();
+
+   glBegin( GL_POLYGON );
+   glColor3f( 1.0, 0.0, 0.0 );
+   glVertex2f( 0.0, 0.7 );
+   glColor3f( 0.0, 1.0, 0.0 );
+   glVertex2f( -0.5, -0.5 );
+   glColor3f( 0.0, 0.0, 1.0 );
+   glVertex2f(  0.5, -0.5 );
+   glEnd();
+
+   sleep(3);
+}
+
+void end( void )
+{
+   SVGAMesaDestroyContext( vmc );
+
+   vga_setmode( TEXT );
+}
+
+
+int main( int argc, char *argv[] )
+{
+   setup();
+   test();
+   end();
+   return 0;
+}
diff --git a/progs/xdemos/xdemo.c b/progs/xdemos/xdemo.c
new file mode 100644
index 0000000000..13facba839
--- /dev/null
+++ b/progs/xdemos/xdemo.c
@@ -0,0 +1,347 @@
+/* $Id: xdemo.c,v 1.1 1999/08/19 00:55:43 jtg Exp $ */
+
+
+/*
+ * Very simple demo of how to use the Mesa/X11 interface instead of the
+ * glx, tk or aux toolkits.  I highly recommend using the GLX interface
+ * instead of the X/Mesa interface, however.
+ *
+ * This program is in the public domain.
+ *
+ * Brian Paul
+ */
+
+
+/*
+ * $Log: xdemo.c,v $
+ * Revision 1.1  1999/08/19 00:55:43  jtg
+ * Initial revision
+ *
+ * Revision 3.0  1998/02/21 02:16:54  brianp
+ * initial rev
+ *
+ */
+
+
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <X11/Xlib.h>
+#include <X11/Xutil.h>
+#include "GL/xmesa.h"
+#include "GL/gl.h"
+
+
+
+static GLint Black, Red, Green, Blue;
+
+
+
+static void make_window( char *title, int color_flag )
+{
+   int x = 10, y = 10, width = 400, height = 300;
+   Display *dpy;
+   int scr;
+   Window root, win;
+   Colormap cmap;
+   XColor xcolor;
+   int attr_flags;
+   XVisualInfo *visinfo;
+   XSetWindowAttributes attr;
+   XTextProperty tp;
+   XSizeHints sh;
+   XEvent e;
+   XMesaContext context;
+   XMesaVisual visual;
+   XMesaBuffer buffer;
+
+
+   /*
+    * Do the usual X things to make a window.
+    */
+
+   dpy = XOpenDisplay(NULL);
+   if (!dpy) {
+      printf("Couldn't open default display!\n");
+      exit(1);
+   }
+
+   scr = DefaultScreen(dpy);
+   root = RootWindow(dpy, scr);
+
+   /* alloc visinfo struct */
+   visinfo = (XVisualInfo *) malloc( sizeof(XVisualInfo) );
+
+   /* Get a visual and colormap */
+   if (color_flag) {
+      /* Open TrueColor window */
+
+/*
+      if (!XMatchVisualInfo( dpy, scr, 24, TrueColor, visinfo )) {
+	 printf("Couldn't get 24-bit TrueColor visual!\n");
+	 exit(1);
+      }
+*/
+      if (!XMatchVisualInfo( dpy, scr, 8, PseudoColor, visinfo )) {
+	 printf("Couldn't get 8-bit PseudoColor visual!\n");
+	 exit(1);
+      }
+
+      cmap = XCreateColormap( dpy, root, visinfo->visual, AllocNone );
+      Black = Red = Green = Blue = 0;
+   }
+   else {
+      /* Open color index window */
+
+      if (!XMatchVisualInfo( dpy, scr, 8, PseudoColor, visinfo )) {
+	 printf("Couldn't get 8-bit PseudoColor visual\n");
+	 exit(1);
+      }
+
+      cmap = XCreateColormap( dpy, root, visinfo->visual, AllocNone );
+
+      /* Allocate colors */
+      xcolor.red   = 0x0;
+      xcolor.green = 0x0;
+      xcolor.blue  = 0x0;
+      xcolor.flags = DoRed | DoGreen | DoBlue;
+      if (!XAllocColor( dpy, cmap, &xcolor )) {
+	 printf("Couldn't allocate black!\n");
+	 exit(1);
+      }
+      Black = xcolor.pixel;
+
+      xcolor.red   = 0xffff;
+      xcolor.green = 0x0;
+      xcolor.blue  = 0x0;
+      xcolor.flags = DoRed | DoGreen | DoBlue;
+      if (!XAllocColor( dpy, cmap, &xcolor )) {
+	 printf("Couldn't allocate red!\n");
+	 exit(1);
+      }
+      Red = xcolor.pixel;
+
+      xcolor.red   = 0x0;
+      xcolor.green = 0xffff;
+      xcolor.blue  = 0x0;
+      xcolor.flags = DoRed | DoGreen | DoBlue;
+      if (!XAllocColor( dpy, cmap, &xcolor )) {
+	 printf("Couldn't allocate green!\n");
+	 exit(1);
+      }
+      Green = xcolor.pixel;
+
+      xcolor.red   = 0x0;
+      xcolor.green = 0x0;
+      xcolor.blue  = 0xffff;
+      xcolor.flags = DoRed | DoGreen | DoBlue;
+      if (!XAllocColor( dpy, cmap, &xcolor )) {
+	 printf("Couldn't allocate blue!\n");
+	 exit(1);
+      }
+      Blue = xcolor.pixel;
+   }
+
+   /* set window attributes */
+   attr.colormap = cmap;
+   attr.event_mask = ExposureMask | StructureNotifyMask;
+   attr.border_pixel = BlackPixel( dpy, scr );
+   attr.background_pixel = BlackPixel( dpy, scr );
+   attr_flags = CWColormap | CWEventMask | CWBorderPixel | CWBackPixel;
+
+   /* Create the window */
+   win = XCreateWindow( dpy, root, x,y, width, height, 0,
+			    visinfo->depth, InputOutput,
+			    visinfo->visual,
+			    attr_flags, &attr);
+   if (!win) {
+      printf("Couldn't open window!\n");
+      exit(1);
+   }
+
+   XStringListToTextProperty(&title, 1, &tp);
+   sh.flags = USPosition | USSize;
+   XSetWMProperties(dpy, win, &tp, &tp, 0, 0, &sh, 0, 0);
+   XMapWindow(dpy, win);
+   while (1) {
+      XNextEvent( dpy, &e );
+      if (e.type == MapNotify && e.xmap.window == win) {
+	 break;
+      }
+   }
+
+
+   /*
+    * Now do the special Mesa/Xlib stuff!
+    */
+
+   visual = XMesaCreateVisual( dpy, visinfo,
+                              (GLboolean) color_flag,
+                               GL_FALSE,  /* alpha_flag */
+                               GL_FALSE,  /* db_flag */
+                               GL_FALSE,  /* stereo flag */
+                               GL_FALSE,  /* ximage_flag */
+                               0,         /* depth size */
+                               0,         /* stencil size */
+                               0,         /* accum_size */
+                               0          /* level */
+                              );
+   if (!visual) {
+      printf("Couldn't create Mesa/X visual!\n");
+      exit(1);
+   }
+
+   /* Create a Mesa rendering context */
+   context = XMesaCreateContext( visual,
+                                 NULL       /* share_list */
+                               );
+   if (!context) {
+      printf("Couldn't create Mesa/X context!\n");
+      exit(1);
+   }
+
+   buffer = XMesaCreateWindowBuffer( visual, win );
+   if (!buffer) {
+      printf("Couldn't create Mesa/X buffer!\n");
+      exit(1);
+   }
+
+
+   XMesaMakeCurrent( context, buffer );
+
+   /* Ready to render! */
+}
+
+
+
+static void draw_cube( void )
+{
+   /* X faces */
+   glIndexi( Red );
+   glColor3f( 1.0, 0.0, 0.0 );
+   glBegin( GL_POLYGON );
+   glVertex3f( 1.0, 1.0, 1.0 );
+   glVertex3f( 1.0, -1.0, 1.0 );
+   glVertex3f( 1.0, -1.0, -1.0 );
+   glVertex3f( 1.0, 1.0, -1.0 );
+   glEnd();
+
+   glBegin( GL_POLYGON );
+   glVertex3f( -1.0, 1.0, 1.0 );
+   glVertex3f( -1.0, 1.0, -1.0 );
+   glVertex3f( -1.0, -1.0, -1.0 );
+   glVertex3f( -1.0, -1.0, 1.0 );
+   glEnd();
+
+   /* Y faces */
+   glIndexi( Green );
+   glColor3f( 0.0, 1.0, 0.0 );
+   glBegin( GL_POLYGON );
+   glVertex3f(  1.0, 1.0,  1.0 );
+   glVertex3f(  1.0, 1.0, -1.0 );
+   glVertex3f( -1.0, 1.0, -1.0 );
+   glVertex3f( -1.0, 1.0,  1.0 );
+   glEnd();
+
+   glBegin( GL_POLYGON );
+   glVertex3f(  1.0, -1.0,  1.0 );
+   glVertex3f( -1.0, -1.0,  1.0 );
+   glVertex3f( -1.0, -1.0, -1.0 );
+   glVertex3f(  1.0, -1.0, -1.0 );
+   glEnd();
+
+   /* Z faces */
+   glIndexi( Blue );
+   glColor3f( 0.0, 0.0, 1.0 );
+   glBegin( GL_POLYGON );
+   glVertex3f(  1.0,  1.0,  1.0 );
+   glVertex3f( -1.0,  1.0,  1.0 );
+   glVertex3f( -1.0, -1.0,  1.0 );
+   glVertex3f(  1.0, -1.0,  1.0 );
+   glEnd();
+
+   glBegin( GL_POLYGON );
+   glVertex3f(  1.0, 1.0, -1.0 );
+   glVertex3f(  1.0,-1.0, -1.0 );
+   glVertex3f( -1.0,-1.0, -1.0 );
+   glVertex3f( -1.0, 1.0, -1.0 );
+   glEnd();
+}
+
+
+
+
+static void display_loop( void )
+{
+   GLfloat xrot, yrot, zrot;
+
+   xrot = yrot = zrot = 0.0;
+
+   glClearColor( 0.0, 0.0, 0.0, 0.0 );
+   glClearIndex( Black );
+
+   glMatrixMode( GL_PROJECTION );
+   glLoadIdentity();
+   glFrustum( -1.0, 1.0,  -1.0, 1.0,  1.0, 10.0 );
+   glTranslatef( 0.0, 0.0, -5.0 );
+
+   glMatrixMode( GL_MODELVIEW );
+   glLoadIdentity();
+
+   glCullFace( GL_BACK );
+   glEnable( GL_CULL_FACE );
+
+   glShadeModel( GL_FLAT );
+
+   while (1) {
+      glClear( GL_COLOR_BUFFER_BIT );
+      glPushMatrix();
+      glRotatef( xrot, 1.0, 0.0, 0.0 );
+      glRotatef( yrot, 0.0, 1.0, 0.0 );
+      glRotatef( zrot, 0.0, 0.0, 1.0 );
+
+      draw_cube();
+
+      glPopMatrix();
+      glFinish();
+
+      xrot += 10.0;
+      yrot += 7.0;
+      zrot -= 3.0;
+   }
+
+}
+
+
+
+
+int main( int argc, char *argv[] )
+{
+   int mode = 0;
+
+   if (argc >= 2)
+   {
+        if (strcmp(argv[1],"-ci")==0)
+           mode = 0;
+        else if (strcmp(argv[1],"-rgb")==0)
+           mode = 1;
+        else
+        {
+           printf("Bad flag: %s\n", argv[1]);
+           printf("Specify -ci for 8-bit color index or -rgb for RGB mode\n");
+           exit(1);
+        }
+   }
+   else
+   {
+        printf("Specify -ci for 8-bit color index or -rgb for RGB mode\n");
+        printf("Defaulting to  8-bit color index\n");
+   }
+
+   make_window( argv[0], mode );
+
+   display_loop();
+   return 0;
+}
+
diff --git a/progs/xdemos/xfont.c b/progs/xdemos/xfont.c
new file mode 100644
index 0000000000..31bfb4bf94
--- /dev/null
+++ b/progs/xdemos/xfont.c
@@ -0,0 +1,148 @@
+/*
+ * (c) Copyright 1993, Silicon Graphics, Inc.
+ * ALL RIGHTS RESERVED 
+ * Permission to use, copy, modify, and distribute this software for 
+ * any purpose and without fee is hereby granted, provided that the above
+ * copyright notice appear in all copies and that both the copyright notice
+ * and this permission notice appear in supporting documentation, and that 
+ * the name of Silicon Graphics, Inc. not be used in advertising
+ * or publicity pertaining to distribution of the software without specific,
+ * written prior permission. 
+ *
+ * THE MATERIAL EMBODIED ON THIS SOFTWARE IS PROVIDED TO YOU "AS-IS"
+ * AND WITHOUT WARRANTY OF ANY KIND, EXPRESS, IMPLIED OR OTHERWISE,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTY OF MERCHANTABILITY OR
+ * FITNESS FOR A PARTICULAR PURPOSE.  IN NO EVENT SHALL SILICON
+ * GRAPHICS, INC.  BE LIABLE TO YOU OR ANYONE ELSE FOR ANY DIRECT,
+ * SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY
+ * KIND, OR ANY DAMAGES WHATSOEVER, INCLUDING WITHOUT LIMITATION,
+ * LOSS OF PROFIT, LOSS OF USE, SAVINGS OR REVENUE, OR THE CLAIMS OF
+ * THIRD PARTIES, WHETHER OR NOT SILICON GRAPHICS, INC.  HAS BEEN
+ * ADVISED OF THE POSSIBILITY OF SUCH LOSS, HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE
+ * POSSESSION, USE OR PERFORMANCE OF THIS SOFTWARE.
+ * 
+ * US Government Users Restricted Rights 
+ * Use, duplication, or disclosure by the Government is subject to
+ * restrictions set forth in FAR 52.227.19(c)(2) or subparagraph
+ * (c)(1)(ii) of the Rights in Technical Data and Computer Software
+ * clause at DFARS 252.227-7013 and/or in similar or successor
+ * clauses in the FAR or the DOD or NASA FAR Supplement.
+ * Unpublished-- rights reserved under the copyright laws of the
+ * United States.  Contractor/manufacturer is Silicon Graphics,
+ * Inc., 2011 N.  Shoreline Blvd., Mountain View, CA 94039-7311.
+ *
+ * OpenGL(TM) is a trademark of Silicon Graphics, Inc.
+ */
+/*
+ *  xfont.c
+ *  Draws some text in a bitmapped font.  Uses glBitmap() 
+ *  and other pixel routines.  Also demonstrates use of 
+ *  display lists.
+ */
+#include <GL/gl.h>
+#include <GL/glu.h>
+#include <GL/glx.h>
+#include <X11/Xlib.h>
+#include <X11/Xutil.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include "glaux.h"
+
+GLuint base;
+
+void makeRasterFont(void)
+{
+    XFontStruct *fontInfo;
+    Font id;
+    unsigned int first, last;
+    Display *xdisplay;
+
+    xdisplay = auxXDisplay ();
+    fontInfo = XLoadQueryFont(xdisplay, 
+	"-adobe-helvetica-medium-r-normal--17-120-100-100-p-88-iso8859-1");
+    if (fontInfo == NULL) {
+        printf ("no font found\n");
+	exit (0);
+    }
+
+    id = fontInfo->fid;
+    first = fontInfo->min_char_or_byte2;
+    last = fontInfo->max_char_or_byte2;
+
+    base = glGenLists((GLuint) last+1);
+    if (base == 0) {
+        printf ("out of display lists\n");
+	exit (0);
+    }
+    glXUseXFont(id, first, last-first+1, base+first);
+/*    *height = fontInfo->ascent + fontInfo->descent;
+    *width = fontInfo->max_bounds.width;  */
+}
+
+void printString(char *s)
+{
+    glPushAttrib (GL_LIST_BIT);
+    glListBase(base);
+    glCallLists(strlen(s), GL_UNSIGNED_BYTE, (GLubyte *)s);
+    glPopAttrib ();
+}
+
+void myinit (void) 
+{
+    makeRasterFont ();
+    glShadeModel (GL_FLAT);    
+}
+
+void display(void)
+{
+    GLfloat white[3] = { 1.0, 1.0, 1.0 };
+    int i, j;
+    char teststring[33];
+
+    glClear(GL_COLOR_BUFFER_BIT);
+    glColor3fv(white);
+    for (i = 32; i < 127; i += 32) {
+	glRasterPos2i(20, 200 - 18*(GLint) i/32);
+	for (j = 0; j < 32; j++)
+	    teststring[j] = (char) (i+j);
+	teststring[32] = 0;
+	printString(teststring);
+    }
+    glRasterPos2i(20, 100);
+    printString("The quick brown fox jumps");
+    glRasterPos2i(20, 82);
+    printString("over a lazy dog.");
+    glFlush ();
+}
+
+void myReshape(int w, int h)
+{
+    glViewport(0, 0, w, h);
+    glMatrixMode(GL_PROJECTION);
+    glLoadIdentity();
+    glOrtho (0.0, (GLfloat) w, 0.0, (GLfloat) h, -1.0, 1.0);
+    glMatrixMode(GL_MODELVIEW);
+    glLoadIdentity();
+}
+
+/*  Main Loop
+ *  Open window with initial window size, title bar, 
+ *  RGBA display mode, and handle input events.
+ */
+int main(int argc, char** argv)
+{
+    auxInitDisplayMode (AUX_SINGLE | AUX_RGB);
+    auxInitPosition (0, 0, 500, 500);
+    if (!auxInitWindow (argv[0]))
+       auxQuit();
+    auxReshapeFunc (myReshape);
+    myinit ();
+    auxMainLoop(display);
+    return 0;
+}
+
+
+
+