Version 2.6.0.0rel-2-6-0-0

3 files changed, 784 insertions, 0 deletions

diff --git a/demos/natives/x11/gltestperf.c b/demos/natives/x11/gltestperf.c
new file mode 100644
index 0000000..2df168b
--- /dev/null
+++ b/demos/natives/x11/gltestperf.c
@@ -0,0 +1,580 @@
+/*
+ * This program is under the GNU GPL.
+ * Use at your own risk.
+ *
+ * written by David Bucciarelli ([email protected])
+ *            Humanware s.r.l.
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <math.h>
+#include <GL/glut.h>
+
+typedef struct
+{
+   char *name;
+   char *unit;
+   void (*init) (void);
+   int (*run) (int, int);
+   int type;
+   int numsize;
+   int size[10];
+}
+benchmark;
+
+static int frontbuffer = 1;
+
+/***************************************************************************/
+
+static void
+init_test01(void)
+{
+   glMatrixMode(GL_PROJECTION);
+   glLoadIdentity();
+   gluOrtho2D(-0.5, 639.5, -0.5, 479.5);
+   glMatrixMode(GL_MODELVIEW);
+
+   glShadeModel(GL_FLAT);
+   glDisable(GL_DEPTH_TEST);
+
+   glClearColor(0.0, 0.1, 1.0, 0.0);
+   glClear(GL_COLOR_BUFFER_BIT);
+   glColor3f(1.0, 0.0, 0.0);
+}
+
+static int
+test01(int size, int num)
+{
+   int x, y;
+
+   glBegin(GL_POINTS);
+   for (y = 0; y < num; y++)
+      for (x = 0; x < 480; x++)
+	 glVertex2i(x, x);
+   glEnd();
+
+   return 480 * num;
+}
+
+/***************************************************************************/
+
+static void
+init_test02(void)
+{
+   glMatrixMode(GL_PROJECTION);
+   glLoadIdentity();
+   gluOrtho2D(-0.5, 639.5, -0.5, 479.5);
+   glMatrixMode(GL_MODELVIEW);
+
+   glShadeModel(GL_SMOOTH);
+   glDisable(GL_DEPTH_TEST);
+
+   glClearColor(0.0, 0.1, 1.0, 0.0);
+   glClear(GL_COLOR_BUFFER_BIT);
+}
+
+static int
+test02(int size, int num)
+{
+   int x, y;
+
+   glBegin(GL_LINES);
+   for (y = 0; y < num; y++)
+      for (x = 0; x < size; x++) {
+	 glColor3f(0.0, 1.0, y / (float) num);
+	 glVertex2i(0, size - 1);
+	 glColor3f(1.0, 0.0, x / (float) size);
+	 glVertex2i(x, x);
+      }
+   glEnd();
+
+   return num * size;
+}
+
+/***************************************************************************/
+
+static void
+init_test03(void)
+{
+   glMatrixMode(GL_PROJECTION);
+   glLoadIdentity();
+   glOrtho(-0.5, 639.5, -0.5, 479.5, 1.0, -1000.0 * 480.0);
+   glMatrixMode(GL_MODELVIEW);
+
+   glShadeModel(GL_SMOOTH);
+   glEnable(GL_DEPTH_TEST);
+
+   glClearColor(0.0, 0.1, 1.0, 0.0);
+   glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+}
+
+static int
+test03(int size, int num)
+{
+   int x, y, z;
+
+   glBegin(GL_TRIANGLES);
+   for (y = 0; y < num; y++)
+      for (x = 0; x < size; x += 5) {
+	 z = num * size - (y * size + x);
+	 glColor3f(0.0, 1.0, 0.0);
+	 glVertex3i(0, x, z);
+
+	 glColor3f(1.0, 0.0, x / (float) size);
+	 glVertex3i(size - 1 - x, 0, z);
+
+	 glColor3f(1.0, x / (float) size, 0.0);
+	 glVertex3i(x, size - 1 - x, z);
+      }
+   glEnd();
+
+   return size * num / 5;
+}
+
+/***************************************************************************/
+
+static void
+init_test04(void)
+{
+   int x, y;
+   GLubyte tex[128 * 128 * 3];
+   GLenum gluerr;
+
+   glMatrixMode(GL_PROJECTION);
+   glLoadIdentity();
+   glOrtho(-0.5, 639.5, -0.5, 479.5, 1.0, -1000.0 * 480.0);
+
+   glMatrixMode(GL_MODELVIEW);
+
+   glShadeModel(GL_SMOOTH);
+   glEnable(GL_DEPTH_TEST);
+
+   glEnable(GL_BLEND);
+   glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+
+   for (y = 0; y < 128; y++)
+      for (x = 0; x < 128; x++) {
+	 tex[(x + y * 128) * 3 + 0] = ((x % (128 / 4)) < (128 / 8)) ? 255 : 0;
+	 tex[(x + y * 128) * 3 + 1] = ((y % (128 / 4)) < (128 / 8)) ? 255 : 0;
+	 tex[(x + y * 128) * 3 + 2] = x;
+      }
+
+   glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
+   if ((gluerr = gluBuild2DMipmaps(GL_TEXTURE_2D, 3, 128, 128, GL_RGB,
+				   GL_UNSIGNED_BYTE, (GLvoid *) (&tex[0])))) {
+      fprintf(stderr, "GLULib%s\n", gluErrorString(gluerr));
+      exit(-1);
+   }
+
+   glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
+   glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
+
+   glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
+		   GL_LINEAR_MIPMAP_NEAREST);
+   glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+
+   glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
+   glEnable(GL_TEXTURE_2D);
+
+   glClearColor(0.0, 0.1, 1.0, 0.0);
+   glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+}
+
+static int
+test04(int size, int num)
+{
+   int x, y, z;
+
+   glBegin(GL_TRIANGLES);
+   for (y = 0; y < num; y++)
+      for (x = 0; x < size; x += 5) {
+	 z = num * size - (y * size + x);
+	 glTexCoord2f(1.0, 1.0);
+	 glColor3f(1.0, 0.0, 0.0);
+	 glVertex3i(0, x, z);
+
+	 glTexCoord2f(0.0, 1.0);
+	 glColor3f(0.0, 1.0, 0.0);
+	 glVertex3i(size - 1 - x, 0, z);
+
+	 glTexCoord2f(1.0, 0.0);
+	 glColor3f(0.0, 0.0, 1.0);
+	 glVertex3i(x, size - 1 - x, z);
+      }
+   glEnd();
+
+   return num * size / 5;
+}
+
+/***************************************************************************/
+
+static void
+init_test05(void)
+{
+   int x, y;
+   GLubyte tex[128 * 128 * 3];
+   GLenum gluerr;
+
+   glMatrixMode(GL_PROJECTION);
+   glLoadIdentity();
+   glOrtho(-0.5, 639.5, -0.5, 479.5, -1.0, 1.0);
+
+   glMatrixMode(GL_MODELVIEW);
+
+   glShadeModel(GL_SMOOTH);
+   glEnable(GL_DEPTH_TEST);
+
+   glEnable(GL_BLEND);
+   glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+
+   for (y = 0; y < 128; y++)
+      for (x = 0; x < 128; x++) {
+	 tex[(x + y * 128) * 3 + 0] = ((x % (128 / 4)) < (128 / 8)) ? 255 : 0;
+	 tex[(x + y * 128) * 3 + 1] = ((y % (128 / 4)) < (128 / 8)) ? 255 : 0;
+	 tex[(x + y * 128) * 3 + 2] = x;
+      }
+
+   glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
+   if ((gluerr = gluBuild2DMipmaps(GL_TEXTURE_2D, 3, 128, 128, GL_RGB,
+				   GL_UNSIGNED_BYTE, (GLvoid *) (&tex[0])))) {
+      fprintf(stderr, "GLULib%s\n", gluErrorString(gluerr));
+      exit(-1);
+   }
+
+   glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
+   glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
+
+   glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
+		   GL_LINEAR_MIPMAP_NEAREST);
+   glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+
+   glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
+   glEnable(GL_TEXTURE_2D);
+
+   glDepthFunc(GL_ALWAYS);
+
+   glClearColor(0.0, 0.1, 1.0, 0.0);
+   glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+}
+
+static int
+test05(int size, int num)
+{
+   int y;
+   float v0[3], v1[3], v2[3], v3[3];
+   float cv0[3], cv1[3], cv2[3], cv3[3];
+   float tv0[3], tv1[3], tv2[3], tv3[3];
+
+   v0[0] = 320 - size / 2;
+   v0[1] = 240 - size / 2;
+   v0[2] = 0.0;
+   v1[0] = 320 + size / 2;
+   v1[1] = 240 - size / 2;
+   v1[2] = 0.0;
+   v2[0] = 320 - size / 2;
+   v2[1] = 240 + size / 2;
+   v2[2] = 0.0;
+   v3[0] = 320 + size / 2;
+   v3[1] = 240 + size / 2;
+   v3[2] = 0.0;
+   cv0[0] = 1.0;
+   cv0[1] = 0.0;
+   cv0[2] = 0.0;
+   cv1[0] = 1.0;
+   cv1[1] = 1.0;
+   cv1[2] = 0.0;
+   cv2[0] = 1.0;
+   cv2[1] = 0.0;
+   cv2[2] = 1.0;
+   cv3[0] = 1.0;
+   cv3[1] = 1.0;
+   cv3[2] = 1.0;
+   tv0[0] = 0.0;
+   tv0[1] = 0.0;
+   tv0[2] = 0.0;
+   tv1[0] = 1.0;
+   tv1[1] = 0.0;
+   tv1[2] = 0.0;
+   tv2[0] = 0.0;
+   tv2[1] = 1.0;
+   tv2[2] = 0.0;
+   tv3[0] = 1.0;
+   tv3[1] = 1.0;
+   tv3[2] = 0.0;
+
+   glBegin(GL_TRIANGLE_STRIP);
+   for (y = 0; y < num; y++) {
+      glColor3fv(cv0);
+      glTexCoord2fv(tv0);
+      glVertex3fv(v0);
+
+      glColor3fv(cv1);
+      glTexCoord2fv(tv1);
+      glVertex3fv(v1);
+
+      glColor3fv(cv2);
+      glTexCoord2fv(tv2);
+      glVertex3fv(v2);
+
+      glColor3fv(cv3);
+      glTexCoord2fv(tv3);
+      glVertex3fv(v3);
+   }
+   glEnd();
+
+   return 4 * num - 2;
+}
+
+/***************************************************************************/
+
+static void
+init_test06(void)
+{
+   glMatrixMode(GL_PROJECTION);
+   glLoadIdentity();
+   gluOrtho2D(-0.5, 639.5, -0.5, 479.5);
+   glMatrixMode(GL_MODELVIEW);
+
+   glShadeModel(GL_SMOOTH);
+   glEnable(GL_DEPTH_TEST);
+
+   glClearColor(0.0, 0.1, 1.0, 0.0);
+   glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+}
+
+static int
+test06(int size, int num)
+{
+   int y;
+
+   for (y = 0; y < num; y++) {
+      glClearColor(y / (float) num, 0.1, 1.0, 0.0);
+      glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+   }
+
+   return num;
+}
+
+/***************************************************************************/
+
+#define BMARKS_TIME 5.0
+
+#define NUM_BMARKS 6
+
+/* 554 ~= sqrt(640*480) */
+
+static benchmark bmarks[NUM_BMARKS] = {
+   {"Simple Points", "Pnts", init_test01, test01, 0, 0,
+    {0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
+   {"Smooth Lines", "Lins", init_test02, test02, 1, 5,
+    {480, 250, 100, 50, 25, 0, 0, 0, 0, 0}},
+   {"ZSmooth Triangles", "Tris", init_test03, test03, 1, 5,
+    {480, 250, 100, 50, 25, 0, 0, 0, 0, 0}},
+   {"ZSmooth Tex Blend Triangles", "Tris", init_test04, test04, 1, 5,
+    {480, 250, 100, 50, 25, 0, 0, 0, 0, 0}},
+   {"ZSmooth Tex Blend TMesh Triangles", "Tris", init_test05, test05, 2, 8,
+    {400, 250, 100, 50, 25, 10, 5, 2, 0, 0}},
+   {"Color/Depth Buffer Clears", "Clrs", init_test06, test06, 3, 0,
+    {554, 0, 0, 0, 0, 0, 0, 0, 0, 0}}
+};
+
+/***************************************************************************/
+
+static void
+dotest0param(benchmark * bmark)
+{
+   float stime, etime, dtime, tottime, maxtime, mintime;
+   int num, numelem, calibnum, j;
+
+   glPushAttrib(GL_ALL_ATTRIB_BITS);
+   bmark->init();
+
+   stime = glutGet(GLUT_ELAPSED_TIME);
+
+   dtime = 0.0;
+   calibnum = 0;
+   while (dtime < 2.0) {
+      bmark->run(0, 1);
+      glFinish();
+      etime = glutGet(GLUT_ELAPSED_TIME);
+      dtime = (etime - stime) / 1000.0;
+      calibnum++;
+   }
+   glPopAttrib();
+
+   fprintf(stderr, "Elapsed time for the calibration test (%d): %f\n",
+	   calibnum, dtime);
+
+   num = (int) ((BMARKS_TIME / dtime) * calibnum);
+
+   if (num < 1)
+      num = 1;
+
+   fprintf(stderr, "Selected number of benchmark iterations: %d\n", num);
+
+   mintime = HUGE_VAL;
+   maxtime = -HUGE_VAL;
+
+   for (tottime = 0.0, j = 0; j < 5; j++) {
+      glPushAttrib(GL_ALL_ATTRIB_BITS);
+      bmark->init();
+
+      stime = glutGet(GLUT_ELAPSED_TIME);
+      numelem = bmark->run(0, num);
+      glFinish();
+      etime = glutGet(GLUT_ELAPSED_TIME);
+
+      glPopAttrib();
+
+      dtime = (etime - stime) / 1000.0;
+      tottime += dtime;
+
+      fprintf(stderr, "Elapsed time for run %d: %f\n", j, dtime);
+
+      if (dtime < mintime)
+	 mintime = dtime;
+      if (dtime > maxtime)
+	 maxtime = dtime;
+   }
+
+   tottime -= mintime + maxtime;
+
+   fprintf(stdout, "%s\n%f %s/sec", bmark->name, numelem / (tottime / 3.0),
+	   bmark->unit);
+
+   if (bmark->type == 3)
+      fprintf(stdout, ", MPixel Fill/sec: %f\n\n",
+	      (numelem * bmark->size[0] * (float) bmark->size[0]) /
+	      (1000000.0 * tottime / 3.0));
+   else
+      fprintf(stdout, "\n\n");
+}
+
+/***************************************************************************/
+
+static void
+dotest1param(benchmark * bmark)
+{
+   float stime, etime, dtime, tottime, maxtime, mintime;
+   int num, numelem, calibnum, j, k;
+
+   fprintf(stdout, "%s\n", bmark->name);
+
+   for (j = 0; j < bmark->numsize; j++) {
+      fprintf(stderr, "Current size: %d\n", bmark->size[j]);
+
+      glPushAttrib(GL_ALL_ATTRIB_BITS);
+      bmark->init();
+
+      stime = glutGet(GLUT_ELAPSED_TIME);
+
+      dtime = 0.0;
+      calibnum = 0;
+      while (dtime < 2.0) {
+	 bmark->run(bmark->size[j], 1);
+	 glFinish();
+	 etime = glutGet(GLUT_ELAPSED_TIME);
+	 dtime = (etime - stime) / 1000.0;
+	 calibnum++;
+      }
+      glPopAttrib();
+
+      fprintf(stderr, "Elapsed time for the calibration test (%d): %f\n",
+	      calibnum, dtime);
+
+      num = (int) ((BMARKS_TIME / dtime) * calibnum);
+
+      if (num < 1)
+	 num = 1;
+
+      fprintf(stderr, "Selected number of benchmark iterations: %d\n", num);
+
+      mintime = HUGE_VAL;
+      maxtime = -HUGE_VAL;
+
+      for (numelem = 1, tottime = 0.0, k = 0; k < 5; k++) {
+	 glPushAttrib(GL_ALL_ATTRIB_BITS);
+	 bmark->init();
+
+	 stime = glutGet(GLUT_ELAPSED_TIME);
+	 numelem = bmark->run(bmark->size[j], num);
+	 glFinish();
+	 etime = glutGet(GLUT_ELAPSED_TIME);
+
+	 glPopAttrib();
+
+	 dtime = (etime - stime) / 1000.0;
+	 tottime += dtime;
+
+	 fprintf(stderr, "Elapsed time for run %d: %f\n", k, dtime);
+
+	 if (dtime < mintime)
+	    mintime = dtime;
+	 if (dtime > maxtime)
+	    maxtime = dtime;
+      }
+
+      tottime -= mintime + maxtime;
+
+      fprintf(stdout, "SIZE=%03d => %f %s/sec", bmark->size[j],
+	      numelem / (tottime / 3.0), bmark->unit);
+      if (bmark->type == 2)
+	 fprintf(stdout, ", MPixel Fill/sec: %f\n",
+		 (numelem * bmark->size[j] * bmark->size[j] / 2) /
+		 (1000000.0 * tottime / 3.0));
+      else
+	 fprintf(stdout, "\n");
+   }
+
+   fprintf(stdout, "\n\n");
+}
+
+/***************************************************************************/
+
+static void
+display(void)
+{
+   int i;
+
+   if (frontbuffer)
+      glDrawBuffer(GL_FRONT);
+   else
+      glDrawBuffer(GL_BACK);
+
+   for (i = 0; i < NUM_BMARKS; i++) {
+      fprintf(stderr, "Benchmark: %d\n", i);
+
+      switch (bmarks[i].type) {
+      case 0:
+      case 3:
+	 dotest0param(&bmarks[i]);
+	 break;
+      case 1:
+      case 2:
+	 dotest1param(&bmarks[i]);
+	 break;
+      }
+   }
+
+   exit(0);
+}
+
+int
+main(int ac, char **av)
+{
+   fprintf(stderr, "GLTest v1.0\nWritten by David Bucciarelli\n");
+
+   if (ac == 2)
+      frontbuffer = 0;
+
+   glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH);
+   glutInitWindowPosition(0, 0);
+   glutInitWindowSize(640, 480);
+   glutCreateWindow("OpenGL/Mesa Performances");
+   glutDisplayFunc(display);
+   glutMainLoop();
+
+   return 0;
+}
diff --git a/demos/natives/x11/xfont.c b/demos/natives/x11/xfont.c
new file mode 100644
index 0000000..a63257c
--- /dev/null
+++ b/demos/natives/x11/xfont.c
@@ -0,0 +1,195 @@
+/* $Id$ */
+
+/*
+ * Mesa 3-D graphics library
+ * 
+ * Copyright (C) 1999  Brian Paul   All Rights Reserved.
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ * 
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+/*
+ * Example of using glXUseXFont().
+ * 5 November 1999
+ * Brian Paul
+ */
+
+
+#include <GL/gl.h>
+#include <GL/glx.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+
+static const char *ProgramName = "xfont";
+
+static const char *FontName = "fixed";
+
+static GLuint FontBase = 0;
+
+   GLXContext ctx;
+   Window win;
+
+
+static void redraw(Display *dpy )
+{
+   static const char *text = "This is glXUseXFont()";
+
+   glXMakeCurrent( dpy, win, ctx );
+   glClear( GL_COLOR_BUFFER_BIT );
+
+   /* triangle */
+   glColor3f( 0.2, 0.2, 1.0 );
+   glBegin(GL_TRIANGLES);
+   glVertex2f( 0, 0.8 );
+   glVertex2f( -0.8, -0.7 );
+   glVertex2f( 0.8, -0.7 );
+   glEnd();
+
+   /* text */
+   glColor3f( 1, 1, 1 );
+   glRasterPos2f(-0.8, 0); 
+   glListBase(FontBase);
+   glCallLists(strlen(text), GL_UNSIGNED_BYTE, (GLubyte *) text);
+
+   glXSwapBuffers( dpy, win );
+
+   /**
+    * NOTE:
+    * this is the "bad" call,
+    * which produces so many "(II) [GLX]:" messages in .X.err
+    * by the NVidia 0.96 linux driver !
+    *
+    * but it is a MUST, if we assume,
+    * that this ctx should be called many threads
+    * -> only one thread can hold the ctx at a time !
+    */
+   glXMakeCurrent( dpy, None, NULL);
+}
+
+
+
+static void setup_font( Display *dpy )
+{
+    XFontStruct *fontInfo;
+    Font id;
+    unsigned int first, last;
+
+    fontInfo = XLoadQueryFont(dpy, FontName);
+    if (!fontInfo) {
+        printf("Error: font %s not found\n", FontName);
+	exit(0);
+    }
+
+    id = fontInfo->fid;
+    first = fontInfo->min_char_or_byte2;
+    last = fontInfo->max_char_or_byte2;
+
+    FontBase = glGenLists((GLuint) last + 1);
+    if (!FontBase) {
+        printf("Error: unable to allocate display lists\n");
+	exit(0);
+    }
+    glXUseXFont(id, first, last - first + 1, FontBase + first);
+}
+
+static Window make_rgb_db_window( Display *dpy, int xpos, int ypos,
+				  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;
+   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 | KeyPressMask;
+   mask = CWBackPixel | CWBorderPixel | CWColormap | CWEventMask;
+
+   win = XCreateWindow( dpy, root, 0, 0, width, height,
+		        0, visinfo->depth, InputOutput,
+		        visinfo->visual, mask, &attr );
+
+   {
+      XSizeHints sizehints;
+      sizehints.x = xpos;
+      sizehints.y = ypos;
+      sizehints.width  = width;
+      sizehints.height = height;
+      sizehints.flags = USSize | USPosition;
+      XSetNormalHints(dpy, win, &sizehints);
+      XSetStandardProperties(dpy, win, ProgramName, ProgramName,
+                              None, (char **)NULL, 0, &sizehints);
+   }
+
+
+   ctx = glXCreateContext( dpy, visinfo, NULL, True );
+
+   glXMakeCurrent( dpy, win, ctx );
+
+   return win;
+}
+
+
+static void event_loop( Display *dpy )
+{
+   while (1) {
+	    redraw(dpy );
+   }
+}
+
+
+
+int main( int argc, char *argv[] )
+{
+   Display *dpy;
+   Window win;
+
+   dpy = XOpenDisplay(NULL);
+
+   win = make_rgb_db_window( dpy, 0, 0, 300, 300 );
+   setup_font( dpy );
+
+   glShadeModel( GL_FLAT );
+   glClearColor( 0.5, 0.5, 1.0, 1.0 );
+
+   XMapWindow( dpy, win );
+
+   event_loop( dpy );
+   return 0;
+}
diff --git a/demos/natives/x11/xfont.sh b/demos/natives/x11/xfont.sh
new file mode 100755
index 0000000..a311161
--- /dev/null
+++ b/demos/natives/x11/xfont.sh
@@ -0,0 +1,9 @@
+#! /bin/sh
+
+rm -f xfont
+
+gcc -I/usr/X11R6/include -g -O2 -Wall -o xfont xfont.c \
+	-L/usr/X11R6/lib -lGLU -lGL
+
+./xfont
+