Merge branch 'gallium-0.1' into gallium-0.2

A first attempt at moving gallium onto a branch directly off master...

It will be interesting to see how much work this takes to get running.

Have resolved the conflicts semi-arbitarily, not compiled or tested.

Conflicts:

	.gitignore
	Makefile
	configs/config.mgw
	configs/darwin
	configs/darwin-x86ppc
	configs/default
	configs/freebsd-dri
	configs/linux-dri
	configs/linux-dri-xcb
	configs/linux-fbdev
	configs/linux-static
	configs/linux-x86-64-static
	configs/linux-x86-static
	doxygen/Makefile
	include/GL/gl.h
	progs/demos/Makefile
	progs/demos/descrip.mms
	progs/demos/texenv.c
	progs/egl/.gitignore
	progs/egl/Makefile
	progs/glsl/.gitignore
	progs/glsl/Makefile
	progs/glsl/convolutions.c
	progs/samples/Makefile.mgw
	progs/tests/.gitignore
	progs/trivial/.gitignore
	progs/trivial/point-param.c
	progs/trivial/tri.c
	progs/xdemos/.gitignore
	progs/xdemos/glthreads.c
	src/egl/drivers/demo/Makefile
	src/egl/drivers/dri/Makefile
	src/egl/main/Makefile
	src/glu/Makefile
	src/glu/sgi/Makefile
	src/glu/sgi/Makefile.mgw
	src/glut/glx/Makefile.mgw
	src/glut/os2/WarpWin.cpp
	src/glut/os2/glut_cindex.cpp
	src/glut/os2/glut_gamemode.cpp
	src/glut/os2/glut_win.cpp
	src/glut/os2/glut_winmisc.cpp
	src/glut/os2/os2_glx.cpp
	src/glut/os2/os2_menu.cpp
	src/glut/os2/os2_winproc.cpp
	src/glw/Makefile
	src/glx/x11/dri_glx.c
	src/glx/x11/glxext.c
	src/mesa/Makefile
	src/mesa/Makefile.mgw
	src/mesa/descrip.mms
	src/mesa/drivers/beos/Makefile
	src/mesa/drivers/common/descrip.mms
	src/mesa/drivers/common/driverfuncs.c
	src/mesa/drivers/directfb/Makefile
	src/mesa/drivers/dri/Makefile.template
	src/mesa/drivers/dri/common/dri_bufmgr.c
	src/mesa/drivers/dri/common/dri_bufmgr.h
	src/mesa/drivers/dri/common/dri_util.c
	src/mesa/drivers/dri/common/extension_helper.h
	src/mesa/drivers/dri/common/mmio.h
	src/mesa/drivers/dri/common/utils.c
	src/mesa/drivers/dri/common/utils.h
	src/mesa/drivers/dri/glcore/Makefile
	src/mesa/drivers/dri/i810/i810screen.c
	src/mesa/drivers/dri/i915/intel_ioctl.c
	src/mesa/drivers/dri/i915/intel_ioctl.h
	src/mesa/drivers/dri/i915/intel_screen.c
	src/mesa/drivers/dri/i915/server/i830_common.h
	src/mesa/drivers/dri/i915/server/i830_dri.h
	src/mesa/drivers/dri/i965/intel_screen.c
	src/mesa/drivers/dri/i965/server/i830_common.h
	src/mesa/drivers/dri/i965/server/i830_dri.h
	src/mesa/drivers/dri/mach64/mach64_screen.c
	src/mesa/drivers/dri/nouveau/nouveau_context.h
	src/mesa/drivers/dri/nouveau/nouveau_fifo.c
	src/mesa/drivers/dri/nouveau/nouveau_fifo.h
	src/mesa/drivers/dri/nouveau/nouveau_screen.c
	src/mesa/drivers/dri/nouveau/nouveau_screen.h
	src/mesa/drivers/dri/r128/r128_tex.h
	src/mesa/drivers/dri/savage/savageioctl.h
	src/mesa/drivers/fbdev/Makefile
	src/mesa/drivers/osmesa/Makefile
	src/mesa/drivers/osmesa/descrip.mms
	src/mesa/drivers/x11/Makefile
	src/mesa/drivers/x11/descrip.mms
	src/mesa/drivers/x11/xm_dd.c
	src/mesa/glapi/glapi.c
	src/mesa/glapi/glthread.c
	src/mesa/main/api_validate.c
	src/mesa/main/attrib.c
	src/mesa/main/bufferobj.c
	src/mesa/main/bufferobj.h
	src/mesa/main/buffers.c
	src/mesa/main/config.h
	src/mesa/main/context.c
	src/mesa/main/descrip.mms
	src/mesa/main/drawpix.c
	src/mesa/main/enums.c
	src/mesa/main/fbobject.c
	src/mesa/main/glheader.h
	src/mesa/main/imports.c
	src/mesa/main/mipmap.c
	src/mesa/main/mm.c
	src/mesa/main/mm.h
	src/mesa/main/mtypes.h
	src/mesa/main/points.c
	src/mesa/main/sources
	src/mesa/main/state.c
	src/mesa/main/texcompress_fxt1.c
	src/mesa/main/texenvprogram.c
	src/mesa/main/texobj.c
	src/mesa/main/texstate.c
	src/mesa/main/texstore.c
	src/mesa/math/descrip.mms
	src/mesa/shader/arbprogram.c
	src/mesa/shader/descrip.mms
	src/mesa/shader/prog_execute.c
	src/mesa/shader/prog_statevars.c
	src/mesa/shader/prog_statevars.h
	src/mesa/shader/prog_uniform.c
	src/mesa/shader/program.c
	src/mesa/shader/program.h
	src/mesa/shader/shader_api.c
	src/mesa/shader/slang/descrip.mms
	src/mesa/shader/slang/library/slang_vertex_builtin_gc.h
	src/mesa/sources
	src/mesa/swrast/descrip.mms
	src/mesa/swrast/s_drawpix.c
	src/mesa/swrast/s_fragprog.c
	src/mesa/swrast/s_readpix.c
	src/mesa/swrast/s_span.c
	src/mesa/swrast_setup/descrip.mms
	src/mesa/tnl/descrip.mms
	src/mesa/tnl/t_context.h
	src/mesa/tnl/t_vp_build.c
	src/mesa/tnl/tnl.h
	src/mesa/vbo/descrip.mms
	src/mesa/vbo/vbo_context.c
	src/mesa/vbo/vbo_exec_array.c
	src/mesa/x86-64/xform4.S
	src/mesa/x86/rtasm/x86sse.c
	src/mesa/x86/rtasm/x86sse.h
	windows/VC6/progs/glut/glut.dsp
	windows/VC7/mesa/gdi/gdi.vcproj
	windows/VC7/mesa/glu/glu.vcproj
	windows/VC7/mesa/mesa.sln
	windows/VC7/mesa/mesa/mesa.vcproj
	windows/VC7/mesa/osmesa/osmesa.vcproj
	windows/VC7/progs/glut/glut.vcproj
	windows/VC8/mesa/gdi/gdi.vcproj
	windows/VC8/mesa/glu/glu.vcproj
	windows/VC8/mesa/mesa.sln
	windows/VC8/mesa/mesa/mesa.vcproj
	windows/VC8/progs/glut/glut.vcproj

23 files changed, 1761 insertions, 122 deletions

diff --git a/progs/tests/.gitignore b/progs/tests/.gitignore
index 6505c315a6..c5b9e28dab 100644
--- a/progs/tests/.gitignore
+++ b/progs/tests/.gitignore
@@ -18,6 +18,8 @@ bufferobj
 bug_3050
 bug_3101
 bug_3195
+bug_texstore_i8
+calibrate_rast
 copypixrate
 crossbar
 cva
@@ -28,6 +30,7 @@ exactrast
 fbotest1
 fbotest2
 fbotexture
+fillrate
 floattex
 fog
 fogcoord
@@ -40,7 +43,9 @@ invert
 jkrahntest
 lineclip
 manytex
+minmag
 mipmap_limits
+mipmap_view
 multipal
 no_s3tc
 packedpixels
@@ -57,6 +62,8 @@ shader_api
 stencil_twoside
 stencil_wrap
 stencilwrap
+stencil_wrap
+subtex
 subtexrate
 tex1d
 texcmp
@@ -78,4 +85,6 @@ vptorus
 vpwarpmesh
 yuvrect
 yuvsquare
+zcomp
+zdrawpix
 zreaddraw
diff --git a/progs/tests/Makefile b/progs/tests/Makefile
index cf8e0bfc1e..b111154512 100644
--- a/progs/tests/Makefile
+++ b/progs/tests/Makefile
@@ -30,6 +30,8 @@ SOURCES = \
 	bug_3050.c \
 	bug_3101.c \
 	bug_3195.c \
+	bug_texstore_i8.c \
+	calibrate_rast.c \
 	copypixrate.c \
 	crossbar.c \
 	cva.c \
@@ -40,6 +42,7 @@ SOURCES = \
 	fbotest1.c \
 	fbotest2.c \
 	fbotexture.c \
+	fillrate.c \
 	fog.c \
 	fogcoord.c \
 	fptest1.c \
@@ -52,6 +55,7 @@ SOURCES = \
 	manytex.c \
 	minmag.c \
 	mipmap_limits.c \
+	mipmap_view.c \
 	multipal.c \
 	no_s3tc.c \
 	packedpixels.c \
@@ -66,6 +70,7 @@ SOURCES = \
 	stencil_twoside.c \
 	stencilwrap.c \
 	stencil_wrap.c \
+	subtex \
 	subtexrate.c \
 	tex1d.c \
 	texcompress2.c \
@@ -85,6 +90,8 @@ SOURCES = \
 	vpwarpmesh.c \
 	yuvrect.c \
 	yuvsquare.c \
+	zcomp.c \
+	zdrawpix.c \
 	zreaddraw.c
 
 PROGS = $(SOURCES:%.c=%)
@@ -159,6 +166,21 @@ invert: invert.o readtex.o
 invert.o: invert.c readtex.h
 	$(CC) -c $(INCLUDES) $(CFLAGS) $(DEFINES) invert.c -o $@
 
+mipmap_view: mipmap_view.o readtex.o
+	$(CC) $(CFLAGS) mipmap_view.o readtex.o $(LIBS) -o $@
+
+mipmap_view.o: mipmap_view.c readtex.h
+	$(CC) -c $(INCLUDES) $(CFLAGS) $(DEFINES) $< -o $@
+
+
+fillrate: fillrate.o readtex.o
+	$(CC) $(CFLAGS) fillrate.o readtex.o $(LIBS) -o $@
+
+fillrate.o: fillrate.c readtex.h
+	$(CC) -c $(INCLUDES) $(CFLAGS) $(DEFINES) $< -o $@
+
+
+
 readtex.o: readtex.c
 	$(CC) -c $(INCLUDES) $(CFLAGS) $(DEFINES) readtex.c -o $@
 
diff --git a/progs/tests/Makefile.win b/progs/tests/Makefile.win
index 0de6c42e39..d42e3cb654 100644
--- a/progs/tests/Makefile.win
+++ b/progs/tests/Makefile.win
@@ -1,4 +1,3 @@
-# $Id: Makefile.win,v 1.1 2002/01/16 01:03:25 kschultz Exp $
 
 # Mesa 3-D graphics library
 # Version:  3.5
diff --git a/progs/tests/antialias.c b/progs/tests/antialias.c
index c389bbea3a..f23b5aff32 100644
--- a/progs/tests/antialias.c
+++ b/progs/tests/antialias.c
@@ -1,4 +1,3 @@
-/* $Id: antialias.c,v 1.2 2003/03/29 16:42:57 brianp Exp $ */
 
 /*
  * Test multisampling and polygon smoothing.
diff --git a/progs/tests/bug_texstore_i8.c b/progs/tests/bug_texstore_i8.c
new file mode 100644
index 0000000000..f8dac210f7
--- /dev/null
+++ b/progs/tests/bug_texstore_i8.c
@@ -0,0 +1,194 @@
+/*
+ * Copyright (c) 1991, 1992, 1993 Silicon Graphics, Inc.
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and
+ * its documentation for any purpose is hereby granted without fee, provided
+ * that (i) the above copyright notices and this permission notice appear in
+ * all copies of the software and related documentation, and (ii) the name of
+ * Silicon Graphics may not be used in any advertising or
+ * publicity relating to the software without the specific, prior written
+ * permission of Silicon Graphics.
+ *
+ * THE SOFTWARE IS PROVIDED "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 BE LIABLE FOR
+ * ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
+ * OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
+ * WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF
+ * LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
+ * OF THIS SOFTWARE.
+ */
+/*
+ * Based on the trivial/quad-tex-2d program.
+ * Modified by Jakob Bornecrantz <jakob@tungstengraphics.com>
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <GL/glut.h>
+
+static GLenum Target = GL_TEXTURE_2D;
+static GLenum Filter = GL_NEAREST;
+GLenum doubleBuffer;
+static float Rot = 0;
+static int win = 0;
+
+static void Init(void)
+{
+	int internalFormat;
+	int sourceFormat;
+
+	fprintf(stderr, "GL_RENDERER   = %s\n", (char *) glGetString(GL_RENDERER));
+	fprintf(stderr, "GL_VERSION    = %s\n", (char *) glGetString(GL_VERSION));
+	fprintf(stderr, "GL_VENDOR     = %s\n", (char *) glGetString(GL_VENDOR));
+
+	glClearColor(0.0, 0.0, 1.0, 0.0);
+
+#define SIZE 16
+	{
+		GLubyte tex2d[SIZE][SIZE][4];
+		GLint s, t;
+
+		for (s = 0; s < SIZE; s++) {
+			for (t = 0; t < SIZE; t++) {
+				tex2d[t][s][0] = 0xff;
+				tex2d[t][s][1] = 0xff;
+				tex2d[t][s][2] = 0xff;
+				tex2d[t][s][3] = 0xff;
+			}
+		}
+
+		internalFormat = GL_LUMINANCE8;
+		sourceFormat = GL_RGBA;
+
+		glTexImage2D(Target,
+			0,
+			internalFormat,
+			SIZE, SIZE,
+			0,
+			sourceFormat,
+			GL_UNSIGNED_BYTE,
+			//GL_UNSIGNED_INT,
+			tex2d);
+
+		glEnable(Target);
+		glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
+		glTexParameterf(Target, GL_TEXTURE_WRAP_R, GL_REPEAT);
+		glTexParameterf(Target, GL_TEXTURE_MIN_FILTER, Filter);
+		glTexParameterf(Target, GL_TEXTURE_MAG_FILTER, Filter);
+	}
+}
+
+static void Reshape(int width, int height)
+{
+	glViewport(0, 0, (GLint)width, (GLint)height);
+	glMatrixMode(GL_PROJECTION);
+	glLoadIdentity();
+#if 0
+	glOrtho(-1.0, 1.0, -1.0, 1.0, -0.5, 1000.0);
+#else
+	glFrustum(-1, 1, -1, 1, 10, 20);
+#endif
+	glMatrixMode(GL_MODELVIEW);
+	glLoadIdentity();
+	glTranslatef(0, 0, -15);
+}
+
+static void Key(unsigned char key, int x, int y)
+{
+	switch (key) {
+	case 'r':
+		Rot += 10.0;
+		break;
+	case 'R':
+		Rot -= 10.0;
+		break;
+	case 27:
+		glutDestroyWindow(win);
+		exit(0);
+	default:
+		return;
+	}
+	glutPostRedisplay();
+}
+
+static void Draw(void)
+{
+	glClear(GL_COLOR_BUFFER_BIT);
+
+	glPushMatrix();
+	glRotatef(Rot, 0, 1, 0);
+
+	glBegin(GL_QUADS);
+	glTexCoord2f(1,0);
+	glVertex3f( 0.9, -0.9, 0.0);
+	glTexCoord2f(1,1);
+	glVertex3f( 0.9,  0.9, 0.0);
+	glTexCoord2f(0,1);
+	glVertex3f(-0.9,  0.9, 0.0);
+	glTexCoord2f(0,0);
+	glVertex3f(-0.9,  -0.9, 0.0);
+	glEnd();
+
+	glPopMatrix();
+
+	glFlush();
+
+	if (doubleBuffer) {
+		glutSwapBuffers();
+	}
+}
+
+static GLenum Args(int argc, char **argv)
+{
+	GLint i;
+
+	doubleBuffer = GL_FALSE;
+
+	for (i = 1; i < argc; i++) {
+		if (strcmp(argv[i], "-sb") == 0) {
+			doubleBuffer = GL_FALSE;
+		} else if (strcmp(argv[i], "-db") == 0) {
+			doubleBuffer = GL_TRUE;
+		} else {
+			fprintf(stderr, "%s (Bad option).\n", argv[i]);
+			return GL_FALSE;
+		}
+	}
+	return GL_TRUE;
+}
+
+int main(int argc, char **argv)
+{
+	GLenum type;
+
+	glutInit(&argc, argv);
+
+	if (Args(argc, argv) == GL_FALSE) {
+		exit(1);
+	}
+
+	glutInitWindowPosition(0, 0);
+	glutInitWindowSize(250, 250);
+
+	type = GLUT_RGB;
+	type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE;
+	glutInitDisplayMode(type);
+
+	win = glutCreateWindow("Tex test");
+	if (!win) {
+		exit(1);
+	}
+
+	Init();
+
+	glutReshapeFunc(Reshape);
+	glutKeyboardFunc(Key);
+	glutDisplayFunc(Draw);
+	glutMainLoop();
+	return 0;
+}
diff --git a/progs/tests/calibrate_rast.c b/progs/tests/calibrate_rast.c
new file mode 100644
index 0000000000..37d8ac85e5
--- /dev/null
+++ b/progs/tests/calibrate_rast.c
@@ -0,0 +1,395 @@
+/*
+ * Automatic primitive rasterization precision test.
+ *
+ * Draw prims at various sub-pixel offsets and examine where the quad is
+ * actually drawn.
+ * Check if the range of offsets which paint the right pixels falls within
+ * OpenGL's specification.
+ * In case of failures, report the coordinate bias needed to fix the problem.
+ *
+ * Note that even Mesa/swrast fails some line tests.  This is because some
+ * window coordinates wind up as 53.9999 instead of 54, for example.  Enabling
+ * the small translation factor below fixes that.  Revisit someday...
+ *
+ * Brian Paul
+ * 28 Feb 2008
+ */
+
+
+#include <assert.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <GL/glut.h>
+
+
+static int Width = 100, Height = 100;
+static int Win;
+static float Step = 0.125;
+#if 0
+/* This tiny offset fixes errors in Mesa/Xlib */
+static float Xtrans = 0.5 * 0.125;
+static float Ytrans = 0.5 * 0.125;
+#else
+static float Xtrans = 0.0;
+static float Ytrans = 0.0;
+#endif
+
+
+static void
+PointCalibrate(int xpos, int ypos)
+{
+   GLfloat rgba[4];
+   float x, y;
+   float xmin, ymin, xmax, ymax;
+
+   xmin = ymin = 1000.0;
+   xmax = ymax = -1000.0;
+
+   for (y = -1.0; y <= 1.0; y += Step) {
+      for (x = -1.0; x <= 1.0; x += Step) {
+         glClear(GL_COLOR_BUFFER_BIT);
+         glBegin(GL_POINTS);
+         glVertex2f(xpos + x, ypos + y);
+         glEnd();
+         glReadPixels(xpos, ypos, 1, 1, GL_RGBA, GL_FLOAT, rgba);
+         if (rgba[0] == 1.0 && rgba[1] == 1.0 && rgba[2] == 1.0) {
+            /* hit */
+            if (x < xmin)
+               xmin = x;
+            if (y < ymin)
+               ymin = y;
+            if (x > xmax)
+               xmax = x;
+            if (y > ymax)
+               ymax = y;
+         }
+      }
+   }
+
+   printf("Point at (%2d, %2d) drawn for x in [%6.3f, %6.3f] and y in [%6.3f, %6.3f]\n",
+          xpos, ypos,
+          xpos + xmin, xpos + xmax,
+          ypos + ymin, ypos + ymax);
+
+   if (xmax - xmin != 1.0 - Step) {
+      printf("  => Inconsistant X-axis rasterization!\n");
+   }
+   if (ymax - ymin != 1.0 - Step) {
+      printf("  => Inconsistant Y-axis rasterization!\n");
+   }
+   if (xmin < 0.0) {
+      printf("  => Points should be X biased by about %f\n", xmin);
+   }
+   if (ymin < 0.0) {
+      printf("  => Points should be Y biased by about %f\n", ymin);
+   }
+   if (xmax > 1.0) {
+      printf("  => Points should be X biased by about %f\n", 1.0 - xmax);
+   }
+   if (ymax > 1.0) {
+      printf("  => Points should be Y biased by about %f\n", 1.0 - ymax);
+   }
+
+}
+
+
+/**
+ * XXX Implement VLineCalibrate() someday
+ */
+static void
+HLineCalibrate(int xpos, int ypos, int len)
+{
+   GLfloat rgba[2][4];
+   float x, y;
+   float ymin, ymax;
+   float xmin_left, xmax_left, xmin_right, xmax_right;
+
+   xmin_left = xmin_right = 1000.0;
+   xmax_left = xmax_right = -1000.0;
+   ymin = 1000;
+   ymax = -1000.0;
+
+   /*
+    * First, check vertical positioning of the horizontal line
+    */
+   for (y = -1.0; y <= 1.0; y += Step) {
+      glClear(GL_COLOR_BUFFER_BIT);
+      glBegin(GL_LINES);
+      glVertex2f(xpos,       ypos + y);
+      glVertex2f(xpos + len, ypos + y);
+      glEnd();
+
+      glReadPixels(xpos + len / 2, ypos, 1, 1, GL_RGBA, GL_FLOAT, rgba);
+      if (rgba[0][0] == 1.0) {
+         /* hit */
+         if (y < ymin)
+            ymin = y;
+         if (y > ymax)
+            ymax = y;
+      }
+   }
+
+   printf("H-line at Y=%2d drawn for y in [%6.3f, %6.3f]\n",
+          ypos,
+          ypos + ymin, ypos + ymax);
+
+   if (ymax - ymin != 1.0 - Step) {
+      printf("  => Inconsistant Y-axis rasterization!\n");
+   }
+
+   if (ymin > 0.5 ) {
+      printf("  => Lines should be Y biased by about %f\n", ymin - 0.5);
+   }
+
+   if (ymax < 0.5 ) {
+      printf("  => Lines should be Y biased by about %f\n", 0.5 - ymax);
+   }
+
+   /*
+    * Second, check endpoints  (for Y at 1/2 pixel)
+    */
+   for (x = -1.0; x <= 1.0; x += Step) {
+      glClear(GL_COLOR_BUFFER_BIT);
+      glBegin(GL_LINES);
+      glVertex2f(xpos + x,       ypos + 0.5f);
+      glVertex2f(xpos + x + len, ypos + 0.5f);
+      glEnd();
+
+      /* left end */
+      glReadPixels(xpos - 1, ypos, 2, 1, GL_RGBA, GL_FLOAT, rgba);
+      if (rgba[0][0] == 0.0 && rgba[1][0] == 1.0) {
+         /* hit */
+         if (x < xmin_left)
+            xmin_left = x;
+         if (x > xmax_left)
+            xmax_left = x;
+      }
+
+      /* right end */
+      glReadPixels(xpos + len - 1, ypos, 2, 1, GL_RGBA, GL_FLOAT, rgba);
+      if (rgba[0][0] == 1.0 && rgba[1][0] == 0.0) {
+         /* hit */
+         if (x < xmin_right)
+            xmin_right = x;
+         if (x > xmax_right)
+            xmax_right = x;
+      }
+   }
+
+   printf("H-line [%d..%d) hit left end for x in [%6.3f, %6.3f] "
+          "hit right end for x in [%6.3f, %6.3f]\n",
+          xpos, xpos + len,
+          xpos + xmin_left, xpos + xmax_left,
+          xpos + len + xmin_right, xpos + len + xmax_right);
+
+   if (xmax_left - xmin_left > 1.0 - Step) {
+      printf("  => Inconsistant left-end rasterization!\n");
+   }
+   if (xmax_right - xmin_right > 1.0 - Step) {
+      printf("  => Inconsistant right-end rasterization!\n");
+   }
+
+   if (xmin_left != xmin_right ||
+       xmax_left != xmax_right) {
+      printf("  => Inconsistant length!\n");
+   }
+
+   if (xmin_left < 0.0) {
+      printf("  => Coords should be X biased by about %f\n", xmin_left );
+   }
+   if (xmin_right < 0.0) {
+      printf("  => Coords should be X biased by about %f\n", xmin_right );
+   }
+   if (xmax_left >= 1.0) {
+      printf("  => Coords should be X biased by about %f\n", -xmax_right + 1.0);
+   }
+   if (xmax_right >= 1.0) {
+      printf("  => Coords should be X biased by about %f\n", -xmax_right + 1.0);
+   }
+
+}
+
+
+static void
+QuadCalibrate(int xpos, int ypos, int width, int height)
+{
+   GLfloat rgba1[2][4];
+   GLfloat rgba2[2][4];
+   float x, y;
+   float xmin, ymin, xmax, ymax;
+
+   xmin = ymin = 1000.0;
+   xmax = ymax = -1000.0;
+
+   for (y = -1.0; y <= 1.0; y += Step) {
+      for (x = -1.0; x <= 1.0; x += Step) {
+         glClear(GL_COLOR_BUFFER_BIT);
+         glBegin(GL_QUADS);
+         glVertex2f(xpos + x,         ypos + y);
+         glVertex2f(xpos + x + width, ypos + y);
+         glVertex2f(xpos + x + width, ypos + y + height);
+         glVertex2f(xpos + x,         ypos + y + height);
+         glEnd();
+
+         /* horizontal measurement */
+         glReadPixels(xpos - 1, ypos + 2, 2, 1, GL_RGBA, GL_FLOAT, rgba1);
+         glReadPixels(xpos + width - 1, ypos + 2, 2, 1, GL_RGBA, GL_FLOAT, rgba2);
+         if (rgba1[0][0] == 0.0 && rgba1[1][0] == 1.0 &&
+             rgba2[0][0] == 1.0 && rgba2[1][0] == 0.0) {
+            if (x < xmin)
+               xmin = x;
+            if (x > xmax)
+               xmax = x;
+         }
+
+         /* vertical measurement */
+         glReadPixels(xpos + 2, ypos - 1, 1, 2, GL_RGBA, GL_FLOAT, rgba1);
+         glReadPixels(xpos + 2, ypos + height - 1, 1, 2, GL_RGBA, GL_FLOAT, rgba2);
+         if (rgba1[0][0] == 0.0 && rgba1[1][0] == 1.0 &&
+             rgba2[0][0] == 1.0 && rgba2[1][0] == 0.0) {
+            if (y < ymin)
+               ymin = y;
+            if (y > ymax)
+               ymax = y;
+         }
+      }
+   }
+
+   printf("Quad at (%2d, %2d)..(%2d, %2d) drawn"
+          " for x in [%6.3f, %6.3f] and y in [%6.3f, %6.3f]\n",
+          xpos, ypos,
+          xpos + width, ypos + height,
+          xpos + xmin, xpos + xmax,
+          ypos + ymin, ypos + ymax);
+
+   if (xmax - xmin != 1.0 - Step) {
+      printf("  => Inconsistant X-axis rasterization/size!\n");
+   }
+   if (ymax - ymin != 1.0 - Step) {
+      printf("  => Inconsistant Y-axis rasterization/size!\n");
+   }
+
+   if (xmin < -0.5) {
+      printf("  => Coords should be X biased by about %f\n", 0.5 + xmin );
+   }
+   if (ymin < -0.5) {
+      printf("  => Coords should be Y biased by about %f\n", 0.5 + ymin);
+   }
+   if (xmax > 0.5) {
+      printf("  => Coords should be X biased by about %f\n", -xmax + 0.5);
+   }
+   if (ymax > 0.5) {
+      printf("  => Coords should be Y biased by about %f\n", -ymax + 0.5);
+   }
+}
+
+
+/**
+ * Misc/disabled code for debugging.
+ */
+static void
+DebugTest(void)
+{
+   glClear(GL_COLOR_BUFFER_BIT);
+   glEnable(GL_BLEND);
+   glBlendFunc(GL_ONE, GL_ONE);
+
+   glColor3f(.5, .5, .5);
+
+   glBegin(GL_LINES);
+   glVertex2f(30, 35.5);
+   glVertex2f(54, 35.5);
+   glVertex2f(54, 35.5);
+   glVertex2f(66, 35.5);
+   glEnd();
+
+   glDisable(GL_BLEND);
+   glColor3f(1,1,1);
+}
+
+
+static void
+Draw(void)
+{
+   glClear(GL_COLOR_BUFFER_BIT);
+
+   glPushMatrix();
+   glTranslatef(Xtrans, Ytrans, 0);
+
+   PointCalibrate(1, 1);
+   PointCalibrate(50, 50);
+   PointCalibrate(28, 17);
+   PointCalibrate(17, 18);
+   printf("\n");
+
+   HLineCalibrate(5, 10, 10);
+   HLineCalibrate(25, 22, 12);
+   HLineCalibrate(54, 33, 12);
+   HLineCalibrate(54+12, 33, 12);
+   printf("\n");
+
+   QuadCalibrate(2, 2, 10, 10);
+   QuadCalibrate(50, 50, 10, 10);
+   QuadCalibrate(28, 17, 12, 12);
+   QuadCalibrate(17, 28, 12, 12);
+
+   (void) DebugTest;
+
+   glPopMatrix();
+
+   glutSwapBuffers();
+}
+
+
+static void
+Reshape(int width, int height)
+{
+   Width = width;
+   Height = height;
+   glViewport(0, 0, width, height);
+   glMatrixMode(GL_PROJECTION);
+   glLoadIdentity();
+   glOrtho(0, width, 0, height, -1, 1);
+   glMatrixMode(GL_MODELVIEW);
+   glLoadIdentity();
+}
+
+
+static void
+Key(unsigned char key, int x, int y)
+{
+   (void) x;
+   (void) y;
+   switch (key) {
+   case 27:
+      glutDestroyWindow(Win);
+      exit(0);
+      break;
+   }
+   glutPostRedisplay();
+}
+
+
+static void
+Init(void)
+{
+   printf("Measurement/callibration for basic prim rasterization...\n");
+   printf("GL_RENDERER: %s\n", (char*) glGetString(GL_RENDERER));
+}
+
+
+int
+main(int argc, char *argv[])
+{
+   glutInit(&argc, argv);
+   glutInitWindowPosition(0, 0);
+   glutInitWindowSize(Width, Height);
+   glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE);
+   Win = glutCreateWindow(argv[0]);
+   glutReshapeFunc(Reshape);
+   glutKeyboardFunc(Key);
+   glutDisplayFunc(Draw);
+   Init();
+   glutMainLoop();
+   return 0;
+}
diff --git a/progs/tests/copypixrate.c b/progs/tests/copypixrate.c
index e9a42a1c8c..142315364c 100644
--- a/progs/tests/copypixrate.c
+++ b/progs/tests/copypixrate.c
@@ -73,6 +73,32 @@ Rand(int max)
 }
 
 
+static void
+BlitOne(void)
+{
+   int x, y;
+
+   do {
+      x = Rand(WinWidth);
+      y = Rand(WinHeight);
+   } while (x <= ImgWidth && y <= ImgHeight);
+
+#ifdef GL_EXT_framebuffer_blit
+   if (UseBlit)
+   {
+      glBlitFramebufferEXT_func(0, 0, ImgWidth, ImgHeight,
+                                x, y, x + ImgWidth, y + ImgHeight,
+                                GL_COLOR_BUFFER_BIT, GL_LINEAR);
+   }
+   else
+#endif
+   {
+      glWindowPos2iARB(x, y);
+      glCopyPixels(0, 0, ImgWidth, ImgHeight, GL_COLOR);
+   }
+}
+
+
 /**
  * Measure glCopyPixels rate
  */
@@ -96,30 +122,14 @@ RunTest(void)
    bpp = (r + g + b + a) / 8;
 
    do {
-      int x, y;
-      x = Rand(WinWidth);
-      y = Rand(WinHeight);
+      BlitOne();
 
-      if (x > ImgWidth || y > ImgHeight) {
-#ifdef GL_EXT_framebuffer_blit
-         if (UseBlit)
-         {
-            glBlitFramebufferEXT_func(0, 0, ImgWidth, ImgHeight,
-                                      x, y, x + ImgWidth, y + ImgHeight,
-                                      GL_COLOR_BUFFER_BIT, GL_LINEAR);
-         }
-         else
-#endif
-         {
-            glWindowPos2iARB(x, y);
-            glCopyPixels(0, 0, ImgWidth, ImgHeight, GL_COLOR);
-         }
-         glFinish(); /* XXX OK? */
+      if (Buffer == GL_FRONT)
+         glFinish(); /* XXX to view progress */
 
-         iters++;
+      iters++;
 
-         t1 = glutGet(GLUT_ELAPSED_TIME) / 1000.0;
-      }
+      t1 = glutGet(GLUT_ELAPSED_TIME) / 1000.0;
    } while (t1 - t0 < 5.0);
 
    glDisable(GL_ALPHA_TEST);
@@ -151,8 +161,10 @@ Draw(void)
    else
       glutSwapBuffers();
 
+#if 1
    printf("exiting\n");
    exit(0);
+#endif
 }
 
 
@@ -175,9 +187,12 @@ Key(unsigned char key, int x, int y)
    (void) x;
    (void) y;
    switch (key) {
-      case 27:
-         exit(0);
-         break;
+   case 'b':
+      BlitOne();
+      break;
+   case 27:
+      exit(0);
+      break;
    }
    glutPostRedisplay();
 }
diff --git a/progs/tests/cva.c b/progs/tests/cva.c
index bde4c6c827..a9393aef0c 100644
--- a/progs/tests/cva.c
+++ b/progs/tests/cva.c
@@ -1,4 +1,3 @@
-/* $Id: cva.c,v 1.8 2006/11/22 19:37:21 sroland Exp $ */
 
 /*
  * Trivial CVA test, good for testing driver fastpaths (especially
diff --git a/progs/tests/descrip.mms b/progs/tests/descrip.mms
deleted file mode 100644
index b6ba3e1aeb..0000000000
--- a/progs/tests/descrip.mms
+++ /dev/null
@@ -1,84 +0,0 @@
-# Makefile for GLUT-based demo programs for VMS
-# contributed by Jouk Jansen  joukj@hrem.stm.tudelft.nl
-
-
-.first
-	define gl [--.include.gl]
-
-.include [--]mms-config.
-
-##### MACROS #####
-
-INCDIR = ([--.include],[-.util])
-CFLAGS = /include=$(INCDIR)/prefix=all/name=(as_is,short)/float=ieee/ieee=denorm
-
-.ifdef SHARE
-GL_LIBS = $(XLIBS)
-.else
-GL_LIBS = [--.lib]libGLUT/l,libMesaGLU/l,libMesaGL/l,$(XLIBS)
-.endif
-
-LIB_DEP = [--.lib]$(GL_LIB) [--.lib]$(GLU_LIB) [--.lib]$(GLUT_LIB)
-
-PROGS = cva.exe,\
-	dinoshade.exe,\
-	fogcoord.exe,\
-	manytex.exe,\
-	multipal.exe,\
-	projtex.exe,\
-	seccolor.exe,\
-	sharedtex.exe,\
-	texline.exe,\
-	texwrap.exe,\
-	vptest1.exe,\
-	vptest2.exe,\
-	vptest3.exe,\
-	vptorus.exe,\
-	vpwarpmesh.exe
-
-##### RULES #####
-.obj.exe :
-	cxxlink $(MMS$TARGET_NAME),$(GL_LIBS)
-
-##### TARGETS #####
-default :
-	$(MMS)$(MMSQUALIFIERS) $(PROGS)
-
-clean :
-	delete *.obj;*
-
-realclean :
-	delete $(PROGS)
-	delete *.obj;*
-
-cva.exe : cva.obj $(LIB_DEP)
-dinoshade.exe : dinoshade.obj $(LIB_DEP)
-fogcoord.exe : fogcoord.obj $(LIB_DEP)
-manytex.exe : manytex.obj $(LIB_DEP)
-multipal.exe : multipal.obj $(LIB_DEP)
-projtex.exe : projtex.obj $(LIB_DEP)
-seccolor.exe : seccolor.obj $(LIB_DEP)
-sharedtex.exe : sharedtex.obj $(LIB_DEP)
-texline.exe : texline.obj $(LIB_DEP)
-texwrap.exe : texwrap.obj $(LIB_DEP)
-vptest1.exe : vptest1.obj $(LIB_DEP)
-vptest2.exe : vptest2.obj $(LIB_DEP)
-vptest3.exe : vptest3.obj $(LIB_DEP)
-vptorus.exe : vptorus.obj $(LIB_DEP)
-vpwarpmesh.exe : vpwarpmesh.obj $(LIB_DEP)
-
-cva.obj : cva.c
-dinoshade.obj : dinoshade.c
-fogcoord.obj : fogcoord.c
-manytex.obj : manytex.c
-multipal.obj : multipal.c
-projtex.obj : projtex.c
-seccolor.obj : seccolor.c
-sharedtex.obj : sharedtex.c
-texline.obj : texline.c
-texwrap.obj : texwrap.c
-vptest1.obj : vptest1.c
-vptest2.obj : vptest2.c
-vptest3.obj : vptest3.c
-vptorus.obj : vptorus.c
-vpwarpmesh.obj : vpwarpmesh.c
diff --git a/progs/tests/fillrate.c b/progs/tests/fillrate.c
new file mode 100644
index 0000000000..8fe636c364
--- /dev/null
+++ b/progs/tests/fillrate.c
@@ -0,0 +1,203 @@
+/**
+ * Measure fill rates for basic shading/texturing modes.
+ *
+ * Brian Paul
+ * 1 April 2008
+ */
+
+
+#define GL_GLEXT_PROTOTYPES
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+#include <GL/glut.h>
+#include "readtex.h"
+
+#define TEXTURE_1_FILE "../images/tile.rgb"
+#define TEXTURE_2_FILE "../images/reflect.rgb"
+
+static int Win;
+static int Width = 1010, Height = 1010;
+static GLuint Textures[2];
+
+
+/**
+ * Draw quad 10 pixels shorter, narrower than window size.
+ */
+static void
+DrawQuad(void)
+{
+   glBegin(GL_POLYGON);
+
+   glColor3f(1.0, 0.5, 0.5);
+   glMultiTexCoord2f(GL_TEXTURE0, 0, 0);
+   glMultiTexCoord2f(GL_TEXTURE1, 0, 0);
+   glVertex2f(5, 5);
+
+   glColor3f(0.5, 1.0, 0.5);
+   glMultiTexCoord2f(GL_TEXTURE0, 1, 0);
+   glMultiTexCoord2f(GL_TEXTURE1, 1, 0);
+   glVertex2f(Width - 5, 5);
+
+   glColor3f(0.5, 0.5, 1.0);
+   glMultiTexCoord2f(GL_TEXTURE0, 1, 1);
+   glMultiTexCoord2f(GL_TEXTURE1, 1, 1);
+   glVertex2f(Width - 5, Height - 5);
+
+   glColor3f(1.0, 0.5, 1.0);
+   glMultiTexCoord2f(GL_TEXTURE0, 0, 1);
+   glMultiTexCoord2f(GL_TEXTURE1, 0, 1);
+   glVertex2f(5, Height - 5);
+
+   glEnd();
+}
+
+
+/**
+ * Compute rate for drawing large quad with given shading/texture state.
+ */
+static void
+RunTest(GLenum shading, GLuint numTextures, GLenum texFilter)
+{
+   const GLdouble minPeriod = 2.0;
+   GLdouble t0, t1;
+   GLdouble pixels, rate;
+   GLint i, iters;
+
+   glActiveTexture(GL_TEXTURE0);
+   if (numTextures > 0) {
+      glBindTexture(GL_TEXTURE_2D, Textures[0]);
+      glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, texFilter);
+      glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, texFilter);
+      glEnable(GL_TEXTURE_2D);
+   }
+   else {
+      glDisable(GL_TEXTURE_2D);
+   }
+
+   glActiveTexture(GL_TEXTURE1);
+   if (numTextures > 1) {
+      glBindTexture(GL_TEXTURE_2D, Textures[1]);
+      glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, texFilter);
+      glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, texFilter);
+      glEnable(GL_TEXTURE_2D);
+   }
+   else {
+      glDisable(GL_TEXTURE_2D);
+   }
+
+   glShadeModel(shading);
+
+
+   glFinish();
+
+   iters = 1;
+   do {
+      iters *= 4;
+      t0 = glutGet(GLUT_ELAPSED_TIME) * 0.001;
+      for (i = 0; i < iters; i++) {
+         DrawQuad();
+      }
+      glFinish();
+      t1 = glutGet(GLUT_ELAPSED_TIME) * 0.001;
+   } while (t1 - t0 < minPeriod);
+
+   glutSwapBuffers();
+
+   pixels = (double) iters * (Width - 10) * (Height - 10);
+   rate = pixels / (t1 - t0);
+   rate /= 1000000.0;  /* megapixels/second */
+
+   printf("%s ", shading == GL_FLAT ? "GL_FLAT" : "GL_SMOOTH");
+   printf("Textures=%u ", numTextures);
+   printf("Filter=%s: ", texFilter == GL_LINEAR ? "GL_LINEAR" : "GL_NEAREST");
+   printf("%g MPixels/sec\n", rate);
+}
+
+
+static void
+Draw(void)
+{
+   glClear(GL_COLOR_BUFFER_BIT);
+
+   RunTest(GL_FLAT, 0, GL_NEAREST);
+   RunTest(GL_SMOOTH, 0, GL_NEAREST);
+   RunTest(GL_SMOOTH, 1, GL_NEAREST);
+   RunTest(GL_SMOOTH, 1, GL_LINEAR);
+   RunTest(GL_SMOOTH, 2, GL_NEAREST);
+   RunTest(GL_SMOOTH, 2, GL_LINEAR);
+
+   glutSwapBuffers();
+}
+
+
+static void
+Reshape(int width, int height)
+{
+   glViewport(0, 0, width, height);
+   glMatrixMode(GL_PROJECTION);
+   glLoadIdentity();
+   glOrtho(0, width, 0, height, -1, 1);
+   glMatrixMode(GL_MODELVIEW);
+   glLoadIdentity();
+   Width = width;
+   Height = height;
+}
+
+
+static void
+Key(unsigned char key, int x, int y)
+{
+   (void) x;
+   (void) y;
+   switch (key) {
+   case 27:
+      glutDestroyWindow(Win);
+      exit(0);
+      break;
+   }
+   glutPostRedisplay();
+}
+
+
+static void
+Init(void)
+{
+   printf("GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER));
+
+   glGenTextures(2, Textures);
+
+   glBindTexture(GL_TEXTURE_2D, Textures[0]);
+   glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
+
+   if (!LoadRGBMipmaps(TEXTURE_1_FILE, GL_RGB)) {
+      printf("Error: couldn't load texture image\n");
+      exit(1);
+   }
+
+   glBindTexture(GL_TEXTURE_2D, Textures[1]);
+   glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
+
+   if (!LoadRGBMipmaps(TEXTURE_2_FILE, GL_RGB)) {
+      printf("Error: couldn't load texture image\n");
+      exit(1);
+   }
+
+}
+
+
+int
+main(int argc, char *argv[])
+{
+   glutInit(&argc, argv);
+   glutInitWindowPosition(0, 0);
+   glutInitWindowSize(Width, Height);
+   glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE);
+   Win = glutCreateWindow(argv[0]);
+   glutReshapeFunc(Reshape);
+   glutKeyboardFunc(Key);
+   glutDisplayFunc(Draw);
+   Init();
+   glutMainLoop();
+   return 0;
+}
diff --git a/progs/tests/getprocaddress.py b/progs/tests/getprocaddress.py
index d16b2d93d0..8adfc51bd6 100644
--- a/progs/tests/getprocaddress.py
+++ b/progs/tests/getprocaddress.py
@@ -1,6 +1,5 @@
 #!/usr/bin/env python
 
-# $Id: getprocaddress.py,v 1.7 2005/06/21 23:42:43 idr Exp $
 
 # Helper for the getprocaddress.c test.
 
diff --git a/progs/tests/jkrahntest.c b/progs/tests/jkrahntest.c
index 85bda8d015..08660b8932 100644
--- a/progs/tests/jkrahntest.c
+++ b/progs/tests/jkrahntest.c
@@ -1,4 +1,3 @@
-/* $Id: jkrahntest.c,v 1.2 2006/01/30 17:12:10 brianp Exp $ */
 
 /* This is a good test for glXSwapBuffers on non-current windows,
  * and the glXCopyContext function.  Fixed several Mesa/DRI bugs with
diff --git a/progs/tests/manytex.c b/progs/tests/manytex.c
index 61a1519ae6..83c8676657 100644
--- a/progs/tests/manytex.c
+++ b/progs/tests/manytex.c
@@ -1,4 +1,3 @@
-/* $Id: manytex.c,v 1.5 2005/09/15 01:58:39 brianp Exp $ */
 
 /*
  * test handling of many texture maps
@@ -30,6 +29,7 @@ static GLboolean LinearFilter = GL_FALSE;
 static GLboolean RandomSize = GL_FALSE;
 static GLint Rows, Columns;
 static GLint LowPriorityCount = 0;
+static GLint Win;
 
 
 static void Idle( void )
@@ -128,6 +128,14 @@ static int RandomInt(int min, int max)
 }
 
 
+static void DeleteTextures(void)
+{
+   glDeleteTextures(NumTextures, TextureID);
+   free(TextureID);
+   TextureID = NULL;
+}
+
+
 
 static void Init( void )
 {
@@ -306,9 +314,12 @@ static void Key( unsigned char key, int x, int y )
          Zrot += step;
          break;
       case ' ':
+         DeleteTextures();
          Init();
          break;
       case 27:
+         DeleteTextures();
+         glutDestroyWindow(Win);
          exit(0);
          break;
    }
@@ -324,7 +335,7 @@ int main( int argc, char *argv[] )
    glutInitWindowPosition( 0, 0 );
    glutInitWindowSize( WinWidth, WinHeight );
    glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE );
-   glutCreateWindow(argv[0]);
+   Win = glutCreateWindow(argv[0]);
    glutReshapeFunc( Reshape );
    glutKeyboardFunc( Key );
    glutDisplayFunc( Display );
diff --git a/progs/tests/mipmap_view.c b/progs/tests/mipmap_view.c
new file mode 100644
index 0000000000..117e201718
--- /dev/null
+++ b/progs/tests/mipmap_view.c
@@ -0,0 +1,248 @@
+/*
+ * Test mipmap generation and lod bias.
+ *
+ * Brian Paul
+ * 17 March 2008
+ */
+
+
+#include <assert.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <math.h>
+#include <GL/glut.h>
+#include <GL/glext.h>
+
+#include "readtex.h"
+
+#define TEXTURE_FILE "../images/arch.rgb"
+
+static int TexWidth = 256, TexHeight = 256;
+static int WinWidth = 1044, WinHeight = 900;
+static GLfloat Bias = 0.0;
+static GLboolean ScaleQuads = GL_FALSE;
+
+
+static void
+PrintString(const char *s)
+{
+   while (*s) {
+      glutBitmapCharacter(GLUT_BITMAP_8_BY_13, (int) *s);
+      s++;
+   }
+}
+
+
+static void
+Display(void)
+{
+   int x, y, bias;
+   char str[100];
+   int texWidth = TexWidth, texHeight = TexHeight;
+
+   glClear(GL_COLOR_BUFFER_BIT);
+
+   glMatrixMode(GL_PROJECTION);
+   glLoadIdentity();
+   glOrtho(0, WinWidth, 0, WinHeight, -1, 1);
+   glMatrixMode(GL_MODELVIEW);
+   glLoadIdentity();
+   
+   glColor3f(1,1,1);
+
+   y = WinHeight - 300;
+   x = 4;
+
+   for (bias = -1; bias < 11; bias++) {
+
+      if (ScaleQuads) {
+         if (bias > 0) {
+            if (texWidth == 1 && texHeight == 1)
+               break;
+            texWidth = TexWidth >> bias;
+            texHeight = TexHeight >> bias;
+            if (texWidth < 1)
+               texWidth = 1;
+            if (texHeight < 1)
+               texHeight = 1;
+         }
+         glTexEnvf(GL_TEXTURE_FILTER_CONTROL_EXT, GL_TEXTURE_LOD_BIAS_EXT, 0.0);
+      }
+      else {
+         glTexEnvf(GL_TEXTURE_FILTER_CONTROL_EXT, GL_TEXTURE_LOD_BIAS_EXT, bias);
+      }
+
+      glRasterPos2f(x, y + TexHeight + 5);
+      if (ScaleQuads)
+         sprintf(str, "Texture Level %d: %d x %d",
+                 (bias < 0 ? 0 : bias),
+                 texWidth, texHeight);
+      else
+         sprintf(str, "Texture LOD Bias = %d", bias);
+      PrintString(str);
+
+      glPushMatrix();
+      glTranslatef(x, y, 0);
+
+      glEnable(GL_TEXTURE_2D);
+
+      glBegin(GL_POLYGON);
+      glTexCoord2f(0, 0);  glVertex2f(0, 0);
+      glTexCoord2f(1, 0);  glVertex2f(texWidth, 0);
+      glTexCoord2f(1, 1);  glVertex2f(texWidth, texHeight);
+      glTexCoord2f(0, 1);  glVertex2f(0, texHeight);
+      glEnd();
+
+      glPopMatrix();
+
+      glDisable(GL_TEXTURE_2D);
+
+      x += TexWidth + 4;
+      if (x >= WinWidth) {
+         x = 4;
+         y -= 300;
+      }
+   }
+
+   glutSwapBuffers();
+}
+
+
+static void
+Reshape(int width, int height)
+{
+   WinWidth = width;
+   WinHeight = height;
+   glViewport(0, 0, width, height);
+}
+
+
+static void
+Key(unsigned char key, int x, int y)
+{
+   (void) x;
+   (void) y;
+   switch (key) {
+      case 'b':
+         Bias -= 10;
+         break;
+      case 'B':
+         Bias += 10;
+         break;
+      case '0':
+      case '1':
+      case '2':
+      case '3':
+      case '4':
+      case '5':
+      case '6':
+      case '7':
+      case '8':
+      case '9':
+         Bias = 100.0 * (key - '0');
+         break;
+      case 's':
+         ScaleQuads = !ScaleQuads;
+         break;
+      case 27:
+         exit(0);
+         break;
+   }
+   glutPostRedisplay();
+}
+
+
+static void
+Init(void)
+{
+   GLfloat maxBias;
+
+   if (!glutExtensionSupported("GL_EXT_texture_lod_bias")) {
+      printf("Sorry, GL_EXT_texture_lod_bias not supported by this renderer.\n");
+      exit(1);
+   }
+
+   if (!glutExtensionSupported("GL_SGIS_generate_mipmap")) {
+      printf("Sorry, GL_SGIS_generate_mipmap not supported by this renderer.\n");
+      exit(1);
+   }
+
+   glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
+
+   if (1) {
+      /* test auto mipmap generation */
+      GLint width, height, i;
+      GLenum format;
+      GLubyte *image = LoadRGBImage(TEXTURE_FILE, &width, &height, &format);
+      if (!image) {
+         printf("Error: could not load texture image %s\n", TEXTURE_FILE);
+         exit(1);
+      }
+      /* resize to TexWidth x TexHeight */
+      if (width != TexWidth || height != TexHeight) {
+         GLubyte *newImage = malloc(TexWidth * TexHeight * 4);
+         gluScaleImage(format, width, height, GL_UNSIGNED_BYTE, image,
+                       TexWidth, TexHeight, GL_UNSIGNED_BYTE, newImage);
+         free(image);
+         image = newImage;
+      }
+      printf("Using GL_SGIS_generate_mipmap\n");
+      glTexParameteri(GL_TEXTURE_2D, GL_GENERATE_MIPMAP_SGIS, GL_TRUE);
+      glTexImage2D(GL_TEXTURE_2D, 0, format, TexWidth, TexHeight, 0,
+                   format, GL_UNSIGNED_BYTE, image);
+      free(image);
+
+      /* make sure mipmap was really generated correctly */
+      width = TexWidth;
+      height = TexHeight;
+      for (i = 0; i < 9; i++) {
+         GLint w, h;
+         glGetTexLevelParameteriv(GL_TEXTURE_2D, i, GL_TEXTURE_WIDTH, &w);
+         glGetTexLevelParameteriv(GL_TEXTURE_2D, i, GL_TEXTURE_HEIGHT, &h);
+         printf("Level %d size: %d x %d\n", i, w, h);
+         assert(w == width);
+         assert(h == height);
+         width /= 2;
+         height /= 2;
+      }
+   }
+   else {
+      if (LoadRGBMipmaps(TEXTURE_FILE, GL_RGB)) {
+         printf("Using gluBuildMipmaps()\n");
+      }
+      else {
+         printf("Error: could not load texture image %s\n", TEXTURE_FILE);
+         exit(1);
+      }
+   }
+
+
+   /* mipmapping required for this extension */
+   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
+   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+   glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
+
+   glGetFloatv(GL_MAX_TEXTURE_LOD_BIAS_EXT, &maxBias);
+
+   printf("GL_RENDERER: %s\n", (char*) glGetString(GL_RENDERER));
+   printf("LOD bias range: [%g, %g]\n", -maxBias, maxBias);
+
+   printf("Press 's' to toggle quad scaling\n");
+}
+
+
+int
+main(int argc, char *argv[])
+{
+   glutInit(&argc, argv);
+   glutInitWindowPosition(0, 0);
+   glutInitWindowSize(WinWidth, WinHeight);
+   glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE);
+   glutCreateWindow(argv[0]);
+   glutReshapeFunc(Reshape);
+   glutKeyboardFunc(Key);
+   glutDisplayFunc(Display);
+   Init();
+   glutMainLoop();
+   return 0;
+}
diff --git a/progs/tests/multipal.c b/progs/tests/multipal.c
index fac652f4e0..7bd4473565 100644
--- a/progs/tests/multipal.c
+++ b/progs/tests/multipal.c
@@ -1,4 +1,3 @@
-/* $Id: multipal.c,v 1.6 2003/12/08 09:03:36 joukj Exp $ */
 
 /*
  * Test multitexture and paletted textures.
diff --git a/progs/tests/multiwindow.c b/progs/tests/multiwindow.c
index e004b0336c..b069bea91c 100644
--- a/progs/tests/multiwindow.c
+++ b/progs/tests/multiwindow.c
@@ -1,4 +1,3 @@
-/* $Id: multiwindow.c,v 1.1 2001/08/21 14:25:31 brianp Exp $ */
 
 /*
  * A skeleton/template GLUT program
@@ -8,7 +7,6 @@
 
 
 /*
- * $Log: multiwindow.c,v $
  * Revision 1.1  2001/08/21 14:25:31  brianp
  * simple multi-window GLUT test prog
  *
diff --git a/progs/tests/sharedtex.c b/progs/tests/sharedtex.c
index 7be90d67f5..c07ebd719c 100644
--- a/progs/tests/sharedtex.c
+++ b/progs/tests/sharedtex.c
@@ -1,4 +1,3 @@
-/* $Id: sharedtex.c,v 1.2 2002/01/16 14:32:46 joukj Exp $ */
 
 /*
  * Test sharing of display lists and texture objects between GLX contests.
diff --git a/progs/tests/subtex.c b/progs/tests/subtex.c
new file mode 100644
index 0000000000..81ceb085aa
--- /dev/null
+++ b/progs/tests/subtex.c
@@ -0,0 +1,223 @@
+/*
+ * Test glTexSubImage mid-way through a frame.
+ *
+ * The same texture is used for both quads but it gets redefined
+ * with glTexSubImage (or glTexImage) after the first quad.
+ */
+
+
+#include <assert.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include "GL/glut.h"
+
+static GLuint Window = 0;
+static GLboolean Anim = GL_FALSE;
+static GLfloat Angle = 0.0f;
+
+
+
+static void
+first_texture(void)
+{
+   static int width=8, height=8;
+   static GLubyte tex1[] = {
+     0, 0, 0, 0, 0, 0, 0, 0,
+     0, 0, 0, 0, 1, 0, 0, 0,
+     0, 0, 0, 1, 1, 0, 0, 0,
+     0, 0, 0, 0, 1, 0, 0, 0,
+     0, 0, 0, 0, 1, 0, 0, 0,
+     0, 0, 0, 0, 1, 0, 0, 0,
+     0, 0, 0, 1, 1, 1, 0, 0,
+     0, 0, 0, 0, 0, 0, 0, 0 };
+
+   GLubyte tex[64][3];
+   GLint i, j;
+
+   /* red on white */
+   for (i=0;i<height;i++) {
+      for (j=0;j<width;j++) {
+         int p = i*width+j;
+         if (tex1[(height-i-1)*width+j]) {
+            tex[p][0] = 255;   tex[p][1] = 0;     tex[p][2] = 0;
+         }
+         else {
+            tex[p][0] = 255;   tex[p][1] = 255;   tex[p][2] = 255;
+         }
+      }
+   }
+
+   glTexImage2D( GL_TEXTURE_2D, 0, 3, width, height, 0,
+                 GL_RGB, GL_UNSIGNED_BYTE, tex );
+}
+
+
+static void
+second_texture(void)
+{
+   static int width=8, height=8;
+
+   static GLubyte tex2[] = {
+     0, 0, 0, 0, 0, 0, 0, 0,
+     0, 0, 0, 2, 2, 0, 0, 0,
+     0, 0, 2, 0, 0, 2, 0, 0,
+     0, 0, 0, 0, 0, 2, 0, 0,
+     0, 0, 0, 0, 2, 0, 0, 0,
+     0, 0, 0, 2, 0, 0, 0, 0,
+     0, 0, 2, 2, 2, 2, 0, 0,
+     0, 0, 0, 0, 0, 0, 0, 0 };
+
+   GLubyte tex[64][3];
+   GLint i, j;
+
+   /* green on blue */
+   for (i=0;i<height;i++) {
+      for (j=0;j<width;j++) {
+         int p = i*width+j;
+         if (tex2[(height-i-1)*width+j]) {
+            tex[p][0] = 0;     tex[p][1] = 255;   tex[p][2] = 0;
+         }
+         else {
+            tex[p][0] = 0;     tex[p][1] = 0;     tex[p][2] = 255;
+         }
+      }
+   }
+#if 0
+   glTexImage2D( GL_TEXTURE_2D, 0, 3, width, height, 0,
+                 GL_RGB, GL_UNSIGNED_BYTE, tex );
+#else
+   glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, width, height,
+                 GL_RGB, GL_UNSIGNED_BYTE, tex );
+#endif
+}
+
+
+
+static void draw( void )
+{
+   glClear( GL_COLOR_BUFFER_BIT );
+
+   glColor3f( 1.0, 1.0, 1.0 );
+
+   /* draw first polygon */
+   glPushMatrix();
+   glTranslatef( -1.0, 0.0, 0.0 );
+   glRotatef( Angle, 0.0, 0.0, 1.0 );
+
+   first_texture();
+
+   glBegin( GL_POLYGON );
+   glTexCoord2f( 0.0, 0.0 );   glVertex2f( -1.0, -1.0 );
+   glTexCoord2f( 1.0, 0.0 );   glVertex2f(  1.0, -1.0 );
+   glTexCoord2f( 1.0, 1.0 );   glVertex2f(  1.0,  1.0 );
+   glTexCoord2f( 0.0, 1.0 );   glVertex2f( -1.0,  1.0 );
+   glEnd();
+   glPopMatrix();
+
+   /* draw second polygon */
+   glPushMatrix();
+   glTranslatef( 1.0, 0.0, 0.0 );
+   glRotatef( Angle-90.0, 0.0, 1.0, 0.0 );
+
+   second_texture();
+
+   glBegin( GL_POLYGON );
+   glTexCoord2f( 0.0, 0.0 );   glVertex2f( -1.0, -1.0 );
+   glTexCoord2f( 1.0, 0.0 );   glVertex2f(  1.0, -1.0 );
+   glTexCoord2f( 1.0, 1.0 );   glVertex2f(  1.0,  1.0 );
+   glTexCoord2f( 0.0, 1.0 );   glVertex2f( -1.0,  1.0 );
+   glEnd();
+   glPopMatrix();
+
+   glutSwapBuffers();
+}
+
+
+
+static void idle( void )
+{
+   static double t0 = -1.;
+   double dt, t = glutGet(GLUT_ELAPSED_TIME) / 1000.0;
+   if (t0 < 0.0)
+      t0 = t;
+   dt = t - t0;
+   t0 = t;
+   Angle += 120.0*dt;
+   glutPostRedisplay();
+}
+
+
+
+/* change view Angle, exit upon ESC */
+static void key(unsigned char k, int x, int y)
+{
+   (void) x;
+   (void) y;
+   switch (k) {
+   case 'a':
+      Anim = !Anim;
+      if (Anim)
+         glutIdleFunc( idle );
+      else
+         glutIdleFunc( NULL );
+      break;
+   case 27:
+      glutDestroyWindow(Window);
+      exit(0);
+   }
+}
+
+
+
+/* new window size or exposure */
+static void reshape( int width, int height )
+{
+   glViewport(0, 0, (GLint)width, (GLint)height);
+   glMatrixMode(GL_PROJECTION);
+   glLoadIdentity();
+   /*   glOrtho( -3.0, 3.0, -3.0, 3.0, -10.0, 10.0 );*/
+   glFrustum( -2.0, 2.0, -2.0, 2.0, 6.0, 20.0 );
+   glMatrixMode(GL_MODELVIEW);
+   glLoadIdentity();
+   glTranslatef( 0.0, 0.0, -8.0 );
+}
+
+
+static void init( void )
+{
+   /* Setup texturing */
+   glEnable( GL_TEXTURE_2D );
+   glTexEnvi( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_DECAL );
+
+
+   glBindTexture( GL_TEXTURE_2D, 0 );
+   glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST );
+   glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST );
+   glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT );
+   glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT );
+}
+
+
+
+int main( int argc, char *argv[] )
+{
+   glutInit(&argc, argv);
+   glutInitWindowPosition(0, 0);
+   glutInitWindowSize(300, 300);
+   glutInitDisplayMode( GLUT_RGB | GLUT_DEPTH | GLUT_DOUBLE );
+
+   Window = glutCreateWindow("Texture Objects");
+   if (!Window) {
+      exit(1);
+   }
+
+   init();
+
+   glutReshapeFunc( reshape );
+   glutKeyboardFunc( key );
+   if (Anim)
+      glutIdleFunc( idle );
+   glutDisplayFunc( draw );
+   glutMainLoop();
+   return 0;
+}
diff --git a/progs/tests/texline.c b/progs/tests/texline.c
index d3935b94af..76dfccd9b1 100644
--- a/progs/tests/texline.c
+++ b/progs/tests/texline.c
@@ -1,4 +1,3 @@
-/* $Id: texline.c,v 1.5 2004/01/28 10:07:48 keithw Exp $ */
 
 /*
  * Test textured lines.
diff --git a/progs/tests/texrect.c b/progs/tests/texrect.c
index 61c1fdd6b4..43edc49180 100644
--- a/progs/tests/texrect.c
+++ b/progs/tests/texrect.c
@@ -1,4 +1,3 @@
-/* $Id: texrect.c,v 1.5 2004/05/06 20:27:32 brianp Exp $ */
 
 /* GL_NV_texture_rectangle test
  *
diff --git a/progs/tests/texwrap.c b/progs/tests/texwrap.c
index 6e9fbe0c70..8143256f8a 100644
--- a/progs/tests/texwrap.c
+++ b/progs/tests/texwrap.c
@@ -1,4 +1,3 @@
-/* $Id: texwrap.c,v 1.8 2005/08/25 03:09:12 brianp Exp $ */
 
 /*
  * Test texture wrap modes.
diff --git a/progs/tests/zcomp.c b/progs/tests/zcomp.c
new file mode 100644
index 0000000000..b53079d07f
--- /dev/null
+++ b/progs/tests/zcomp.c
@@ -0,0 +1,223 @@
+/**
+ * Test Z compositing with glDrawPixels(GL_DEPTH_COMPONENT) and stencil test.
+ */
+
+#define GL_GLEXT_PROTOTYPES
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+#include <GL/glut.h>
+#include "../util/showbuffer.c"
+
+
+static int Win;
+static GLfloat Xrot = 0, Yrot = 0, Zpos = 6;
+static GLboolean Anim = GL_FALSE;
+
+static int Width = 400, Height = 200;
+static GLfloat *Zimg;
+static GLubyte *Cimg;
+static GLboolean showZ = 0;
+
+
+static void
+Idle(void)
+{
+   Xrot += 3.0;
+   Yrot += 4.0;
+   glutPostRedisplay();
+}
+
+
+/**
+ * Draw first object, save color+Z images
+ */
+static void
+DrawFirst(void)
+{
+   static const GLfloat red[4] = { 1.0, 0.0, 0.0, 0.0 };
+
+   glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, red);
+
+   glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
+   glPushMatrix();
+   glTranslatef(-1, 0, 0);
+   glRotatef(45 + Xrot, 1, 0, 0);
+
+   glutSolidTorus(0.75, 2.0, 10, 20);
+
+   glPopMatrix();
+
+   glReadPixels(0, 0, Width, Height, GL_DEPTH_COMPONENT, GL_FLOAT, Zimg);
+   glReadPixels(0, 0, Width, Height, GL_RGBA, GL_UNSIGNED_BYTE, Cimg);
+}
+
+
+/**
+ * Draw second object.
+ */
+static void
+DrawSecond(void)
+{
+   static const GLfloat blue[4] = { 0.0, 0.0, 1.0, 0.0 };
+
+   glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, blue);
+
+   glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);
+
+   glPushMatrix();
+   glTranslatef(+1, 0, 0);
+   glRotatef(-45 + Xrot, 1, 0, 0);
+
+   glutSolidTorus(0.75, 2.0, 10, 20);
+
+   glPopMatrix();
+}
+
+
+/**
+ * Composite first/saved image over second rendering.
+ */
+static void
+Composite(void)
+{
+   glWindowPos2i(0, 0);
+
+   /* Draw Z values, set stencil where Z test passes */
+   glEnable(GL_STENCIL_TEST);
+   glStencilFunc(GL_ALWAYS, 1, ~0);
+   glStencilOp(GL_KEEP, GL_KEEP, GL_REPLACE);
+   glColorMask(0,0,0,0);
+   glDrawPixels(Width, Height, GL_DEPTH_COMPONENT, GL_FLOAT, Zimg);
+   glColorMask(1,1,1,1);
+
+   /* Draw color where stencil==1 */
+   glStencilFunc(GL_EQUAL, 1, ~0);
+   glStencilOp(GL_KEEP, GL_KEEP, GL_KEEP);
+   glDisable(GL_DEPTH_TEST);
+   glDrawPixels(Width, Height, GL_RGBA, GL_UNSIGNED_BYTE, Cimg);
+   glEnable(GL_DEPTH_TEST);
+
+   glDisable(GL_STENCIL_TEST);
+}
+
+
+static void
+Draw(void)
+{
+   DrawFirst();
+   DrawSecond();
+   Composite();
+   glutSwapBuffers();
+}
+
+
+static void
+Reshape(int width, int height)
+{
+   GLfloat ar = (float) width / height;
+   glViewport(0, 0, width, height);
+   glMatrixMode(GL_PROJECTION);
+   glLoadIdentity();
+   glFrustum(-ar, ar, -1.0, 1.0, 5.0, 30.0);
+   glMatrixMode(GL_MODELVIEW);
+   glLoadIdentity();
+   glTranslatef(0.0, 0.0, -15.0);
+
+   Width = width;
+   Height = height;
+
+   if (Zimg)
+      free(Zimg);
+   if (Cimg)
+      free(Cimg);
+   Zimg = (float *) malloc(width * height * 4);
+   Cimg = (GLubyte *) malloc(width * height * 4);
+}
+
+
+static void
+Key(unsigned char key, int x, int y)
+{
+   const GLfloat step = 1.0;
+   (void) x;
+   (void) y;
+   switch (key) {
+      case 'a':
+         Anim = !Anim;
+         if (Anim)
+            glutIdleFunc(Idle);
+         else
+            glutIdleFunc(NULL);
+         break;
+      case 'd':
+         showZ = !showZ;
+         break;
+      case 'z':
+         Zpos -= step;
+         break;
+      case 'Z':
+         Zpos += step;
+         break;
+      case 27:
+         glutDestroyWindow(Win);
+         exit(0);
+         break;
+   }
+   glutPostRedisplay();
+}
+
+
+static void
+SpecialKey(int key, int x, int y)
+{
+   const GLfloat step = 3.0;
+   (void) x;
+   (void) y;
+   switch (key) {
+      case GLUT_KEY_UP:
+         Xrot -= step;
+         break;
+      case GLUT_KEY_DOWN:
+         Xrot += step;
+         break;
+      case GLUT_KEY_LEFT:
+         Yrot -= step;
+         break;
+      case GLUT_KEY_RIGHT:
+         Yrot += step;
+         break;
+   }
+   glutPostRedisplay();
+}
+
+
+static void
+Init(void)
+{
+   /* setup lighting, etc */
+   glEnable(GL_DEPTH_TEST);
+   glEnable(GL_LIGHTING);
+   glEnable(GL_LIGHT0);
+}
+
+
+int
+main(int argc, char *argv[])
+{
+   glutInit(&argc, argv);
+   glutInitWindowPosition(0, 0);
+   glutInitWindowSize(Width, Height);
+   glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH | GLUT_STENCIL);
+   Win = glutCreateWindow(argv[0]);
+   glutReshapeFunc(Reshape);
+   glutKeyboardFunc(Key);
+   glutSpecialFunc(SpecialKey);
+   glutDisplayFunc(Draw);
+   if (Anim)
+      glutIdleFunc(Idle);
+   Init();
+   glutMainLoop();
+   return 0;
+}
diff --git a/progs/tests/zdrawpix.c b/progs/tests/zdrawpix.c
new file mode 100644
index 0000000000..dd222e7dd0
--- /dev/null
+++ b/progs/tests/zdrawpix.c
@@ -0,0 +1,192 @@
+/**
+ * Test glDrawPixels(GL_DEPTH_COMPONENT)
+ *
+ * We load a window-sized buffer of Z values so that Z=1 at the top and
+ * Z=0 at the bottom (and interpolate between).
+ * We draw that image into the Z buffer, then draw an ordinary cube.
+ * The bottom part of the cube should be "clipped" where the cube fails
+ * the Z test.
+ *
+ * Press 'd' to view the Z buffer as a grayscale image.
+ */
+
+#define GL_GLEXT_PROTOTYPES
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+#include <GL/glut.h>
+#include "../util/showbuffer.c"
+
+
+static int Win;
+static GLfloat Xrot = 50, Yrot = 40, Zpos = 6;
+static GLboolean Anim = GL_FALSE;
+
+static int Width = 200, Height = 200;
+static GLfloat *z;
+static GLboolean showZ = 0;
+
+
+static void
+Idle(void)
+{
+   Xrot += 3.0;
+   Yrot += 4.0;
+   glutPostRedisplay();
+}
+
+
+static void
+Draw(void)
+{
+   glClearColor(0, 0, 0.5, 0);
+   glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
+#if 1
+   glColor3f(1, 0, 0);
+   glWindowPos2i(0,0);
+   glColorMask(0,0,0,0);
+   glDrawPixels(Width, Height, GL_DEPTH_COMPONENT, GL_FLOAT, z);
+#elif 0
+   glPushMatrix();
+   glTranslatef(-0.75, 0, Zpos);
+   glutSolidSphere(1.0, 20, 10);
+   glPopMatrix();
+#endif
+   glColorMask(1,1,1,1);
+
+   /* draw cube */
+   glPushMatrix();
+   glTranslatef(0, 0, Zpos);
+   glRotatef(Xrot, 1, 0, 0);
+   glRotatef(Yrot, 0, 1, 0);
+   glutSolidCube(2.0);
+   glPopMatrix();
+
+#if 0
+   /* drawpixels after cube */
+   glColor3f(1, 0, 0);
+   glWindowPos2i(0,0);
+   //glColorMask(0,0,0,0);
+   glDrawPixels(Width, Height, GL_DEPTH_COMPONENT, GL_FLOAT, z);
+#endif
+
+   if (showZ) {
+      ShowDepthBuffer(Width, Height, 0.0, 1.0);
+   }
+
+   glutSwapBuffers();
+}
+
+
+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, 5.0, 30.0);
+   glMatrixMode(GL_MODELVIEW);
+   glLoadIdentity();
+   glTranslatef(0.0, 0.0, -15.0);
+
+   Width = width;
+   Height = height;
+
+   z = (float *) malloc(width * height * 4);
+   {
+      int i, j, k = 0;
+      for (i = 0; i < height; i++) {
+         float zval = (float) i / (height - 1);
+         for (j = 0; j < width; j++) {
+            z[k++] = zval;
+         }
+      }
+   }
+}
+
+
+static void
+Key(unsigned char key, int x, int y)
+{
+   const GLfloat step = 1.0;
+   (void) x;
+   (void) y;
+   switch (key) {
+      case 'a':
+         Anim = !Anim;
+         if (Anim)
+            glutIdleFunc(Idle);
+         else
+            glutIdleFunc(NULL);
+         break;
+      case 'd':
+         showZ = !showZ;
+         break;
+      case 'z':
+         Zpos -= step;
+         break;
+      case 'Z':
+         Zpos += step;
+         break;
+      case 27:
+         glutDestroyWindow(Win);
+         exit(0);
+         break;
+   }
+   glutPostRedisplay();
+}
+
+
+static void
+SpecialKey(int key, int x, int y)
+{
+   const GLfloat step = 3.0;
+   (void) x;
+   (void) y;
+   switch (key) {
+      case GLUT_KEY_UP:
+         Xrot -= step;
+         break;
+      case GLUT_KEY_DOWN:
+         Xrot += step;
+         break;
+      case GLUT_KEY_LEFT:
+         Yrot -= step;
+         break;
+      case GLUT_KEY_RIGHT:
+         Yrot += step;
+         break;
+   }
+   glutPostRedisplay();
+}
+
+
+static void
+Init(void)
+{
+   /* setup lighting, etc */
+   glEnable(GL_DEPTH_TEST);
+   glEnable(GL_LIGHTING);
+   glEnable(GL_LIGHT0);
+}
+
+
+int
+main(int argc, char *argv[])
+{
+   glutInit(&argc, argv);
+   glutInitWindowPosition(0, 0);
+   glutInitWindowSize(400, 400);
+   glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
+   Win = glutCreateWindow(argv[0]);
+   glutReshapeFunc(Reshape);
+   glutKeyboardFunc(Key);
+   glutSpecialFunc(SpecialKey);
+   glutDisplayFunc(Draw);
+   if (Anim)
+      glutIdleFunc(Idle);
+   Init();
+   glutMainLoop();
+   return 0;
+}