Merge branch 'master' of git+ssh://[email protected]/git/mesa/mesa into 965-glsl

9 files changed, 511 insertions, 252 deletions

diff --git a/progs/demos/Makefile.win b/progs/demos/Makefile.win
index 4ac32361b26..0d0b19b9fe7 100644
--- a/progs/demos/Makefile.win
+++ b/progs/demos/Makefile.win
@@ -22,9 +22,11 @@ LIBS   = GLUT32.LIB OPENGL32.LIB
 
 all:	OPENGL32.DLL GLU32.DLL GLUT32.DLL \
 	readtex.h readtex.c showbuffer.h showbuffer.c \
+	extfuncs.h trackball.h trackball.c \
 	arbfplight.exe arbfslight.exe arbocclude.exe bounce.exe \
-	clearspd.exe cubemap.exe drawpix.exe fire.exe fogcoord.exe \
-	fplight.exe gamma.exe gearbox.exe \
+	clearspd.exe cubemap.exe drawpix.exe engine.exe \
+	fire.exe fogcoord.exe \
+	fplight.exe fslight.exe gamma.exe gearbox.exe \
 	gears.exe geartrain.exe gloss.exe \
 	glinfo.exe glslnoise.exe \
 	gltestperf.exe glutfx.exe ipers.exe isosurf.exe lodbias.exe \
@@ -42,14 +44,16 @@ bounce.exe: bounce.obj
 clearspd.exe: clearspd.obj
 cubemap.exe: cubemap.obj readtex.obj
 drawpix.exe: drawpix.obj readtex.obj
+engine.exe: engine.obj readtex.obj trackball.obj
 fire.exe: fire.obj readtex.obj
 fogcoord.exe: fogcoord.obj readtex.obj
 fplight.exe: fplight.obj
+fslight.exe: fslight.obj
 gamma.exe: gamma.obj
 gearbox.exe: gearbox.obj
 gears.exe: gears.obj
 geartrain.exe: geartrain.obj
-gloss.exe: gloss.obj readtex.obj
+gloss.exe: gloss.obj readtex.obj trackball.obj
 glinfo.exe: glinfo.obj
 glslnoise.exe: glslnoise.obj
 gltestperf.exe: gltestperf.obj
@@ -105,14 +109,23 @@ showbuffer.c: $(TOP)\progs\util\showbuffer.c
 showbuffer.h: $(TOP)\progs\util\showbuffer.h
 	copy $** .
 
+trackball.c: $(TOP)\progs\util\trackball.c
+	copy $** .
+
+trackball.h: $(TOP)\progs\util\trackball.h
+	copy $** .
+
+extfuncs.h: $(TOP)\progs\util\extfuncs.h
+	copy $** .
+
 .obj.exe:
 	$(link) $(ldebug) -out:$@ $** /LIBPATH:$(LIBDIR) $(LIBS)
 
 .c.obj:
-	$(cc) $(cdebug) $(cflags) $(cvars) /I$(INCDIR) $*.c
+	$(cc) $(cdebug) $(cflags) $(cvars) -D_USE_MATH_DEFINES /I$(INCDIR) $*.c
 
 clean::
-	del *.obj *.exe readtex.* showbuffer.*
+	del *.obj *.exe readtex.* showbuffer.* trackball.*
 
 clobber::
 
diff --git a/progs/demos/arbfplight.c b/progs/demos/arbfplight.c
index d9c564fbe56..bc2c7e312ab 100644
--- a/progs/demos/arbfplight.c
+++ b/progs/demos/arbfplight.c
@@ -24,6 +24,7 @@ static GLuint VertProg;
 static GLboolean Anim = GL_TRUE;
 static GLboolean Wire = GL_FALSE;
 static GLboolean PixelLight = GL_TRUE;
+static GLint Win;
 
 static GLint T0 = 0;
 static GLint Frames = 0;
@@ -148,6 +149,7 @@ static void Key( unsigned char key, int x, int y )
       case 27:
          glDeleteProgramsARB_func(1, &VertProg);
          glDeleteProgramsARB_func(1, &FragProg);
+         glutDestroyWindow(Win);
          exit(0);
          break;
    }
@@ -382,7 +384,7 @@ int main( int argc, char *argv[] )
    glutInitWindowPosition( 0, 0 );
    glutInitWindowSize( 200, 200 );
    glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH );
-   glutCreateWindow(argv[0]);
+   Win = glutCreateWindow(argv[0]);
    glutReshapeFunc( Reshape );
    glutKeyboardFunc( Key );
    glutSpecialFunc( SpecialKey );
diff --git a/progs/demos/arbfslight.c b/progs/demos/arbfslight.c
index 374de568872..69575f06236 100644
--- a/progs/demos/arbfslight.c
+++ b/progs/demos/arbfslight.c
@@ -62,7 +62,7 @@ static PFNGLUNIFORM3FVARBPROC glUniform4fvARB = NULL;
 
 static void normalize (GLfloat *dst, const GLfloat *src)
 {
-   GLfloat len = sqrtf (src[0] * src[0] + src[1] * src[1] + src[2] * src[2]);
+   GLfloat len = sqrt (src[0] * src[0] + src[1] * src[1] + src[2] * src[2]);
    dst[0] = src[0] / len;
    dst[1] = src[1] / len;
    dst[2] = src[2] / len;
diff --git a/progs/demos/fogcoord.c b/progs/demos/fogcoord.c
index 19a15f05b87..00c73c6f048 100644
--- a/progs/demos/fogcoord.c
+++ b/progs/demos/fogcoord.c
@@ -7,151 +7,136 @@
  * Daniel Borca
  */
 
-
+#define GL_GLEXT_PROTOTYPES
 #include <stdio.h>
 #include <stdlib.h>
 #include <math.h>
 #include <GL/glut.h>
 
-#include "readtex.h"
-
-#define TEXTURE_FILE "../images/bw.rgb"
-
-#define ARRAYS 0     /* use glDrawElements   */
-
-#define VERBOSE 1    /* tell me what happens */
+#define DEPTH 5.0f
 
-#define DEPTH 15.0f
+static PFNGLFOGCOORDFEXTPROC glFogCoordf_ext;
+static PFNGLFOGCOORDPOINTEREXTPROC glFogCoordPointer_ext;
 
-#if !defined(GLAPIENTRYP)
-#    define GLAPIENTRYP *
-#endif
-
-typedef void (GLAPIENTRYP GLFOGCOORDFEXTPROC) (GLfloat f);
-typedef void (GLAPIENTRYP GLFOGCOORDPOINTEREXTPROC) (GLenum, GLsizei, const GLvoid *);
-
-static GLFOGCOORDFEXTPROC glFogCoordf_ext;
-#if ARRAYS
-static GLFOGCOORDPOINTEREXTPROC glFogCoordPointer_ext;
-#endif
 static GLboolean have_fog_coord;
 
 static GLfloat camz;
-static GLuint texture[1];
 
 static GLint fogMode;
 static GLboolean fogCoord;
 static GLfloat fogDensity = 0.75;
-static GLfloat fogStart = 1.0, fogEnd = 40.0;
+static GLfloat fogStart = 1.0, fogEnd = DEPTH;
 static GLfloat fogColor[4] = {0.6f, 0.3f, 0.0f, 1.0f};
+static const char *ModeStr = NULL;
+static GLboolean Arrays = GL_FALSE;
+static GLboolean Texture = GL_TRUE;
 
 
-static void APIENTRY glFogCoordf_nop (GLfloat f)
+static void
+Reset(void)
 {
-   (void)f;
+   fogMode = 1;
+   fogCoord = 1;
+   fogDensity = 0.75;
+   fogStart = 1.0;
+   fogEnd = DEPTH;
+   Arrays = GL_FALSE;
+   Texture = GL_TRUE;
 }
 
 
-static int BuildTexture (const char *filename, GLuint texid[])
+static void APIENTRY
+glFogCoordf_nop (GLfloat f)
 {
-   GLubyte *tex_data;
-   GLenum tex_format;
-   GLint tex_width, tex_height;
+   (void)f;
+}
 
-   tex_data = LoadRGBImage(filename, &tex_width, &tex_height, &tex_format);
-   if (tex_data == NULL) {
-      return -1;
-   }
 
-   {
-      GLint tex_max;
-      glGetIntegerv(GL_MAX_TEXTURE_SIZE, &tex_max);
-      if ((tex_width > tex_max) || (tex_height > tex_max)) {
-         return -1;
-      }
+static void
+PrintString(const char *s)
+{
+   while (*s) {
+      glutBitmapCharacter(GLUT_BITMAP_8_BY_13, (int) *s);
+      s++;
    }
+}
 
-   glGenTextures(1, texid);
-   
-   glBindTexture(GL_TEXTURE_2D, texid[0]);
-   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
-   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
-
-   glTexImage2D(GL_TEXTURE_2D, 0, tex_format, tex_width, tex_height, 0,
-                tex_format, GL_UNSIGNED_BYTE, tex_data);
 
-   return 0;
+static void
+PrintInfo(void)
+{
+   char s[100];
+
+   glDisable(GL_FOG);
+   glColor3f(0, 1, 1);
+
+   sprintf(s, "Mode(m): %s  Start(s/S): %g  End(e/E): %g  Density(d/D): %g",
+           ModeStr, fogStart, fogEnd, fogDensity);
+   glWindowPos2iARB(5, 20);
+   PrintString(s);
+
+   sprintf(s, "Arrays(a): %s  glFogCoord(c): %s  EyeZ(z/z): %g",
+           (Arrays ? "Yes" : "No"),
+           (fogCoord ? "Yes" : "No"),
+           camz);
+   glWindowPos2iARB(5, 5);
+   PrintString(s);
 }
 
 
-static int SetFogMode (GLint fogMode)
+static int
+SetFogMode(GLint fogMode)
 {
    fogMode &= 3;
    switch (fogMode) {
    case 0:
+      ModeStr = "Off";
       glDisable(GL_FOG);
-#if VERBOSE
-      printf("fog(disable)\n");
-#endif
       break;
    case 1:
+      ModeStr = "GL_LINEAR";
       glEnable(GL_FOG);
       glFogi(GL_FOG_MODE, GL_LINEAR);
       glFogf(GL_FOG_START, fogStart);
       glFogf(GL_FOG_END, fogEnd);
-#if VERBOSE
-      printf("fog(GL_LINEAR, %.2f, %.2f)\n", fogStart, fogEnd);
-#endif
       break;
    case 2:
+      ModeStr = "GL_EXP";
       glEnable(GL_FOG);
       glFogi(GL_FOG_MODE, GL_EXP);
       glFogf(GL_FOG_DENSITY, fogDensity);
-#if VERBOSE
-      printf("fog(GL_EXP, %.2f)\n", fogDensity);
-#endif
       break;
    case 3:
+      ModeStr = "GL_EXP2";
       glEnable(GL_FOG);
       glFogi(GL_FOG_MODE, GL_EXP2);
       glFogf(GL_FOG_DENSITY, fogDensity);
-#if VERBOSE
-      printf("fog(GL_EXP2, %.2f)\n", fogDensity);
-#endif
       break;
    }
    return fogMode;
 }
 
 
-static GLboolean SetFogCoord (GLboolean fogCoord)
+static GLboolean
+SetFogCoord(GLboolean fogCoord)
 {
    glFogCoordf_ext = glFogCoordf_nop;
 
    if (!have_fog_coord) {
-#if VERBOSE
-      printf("fog(GL_FRAGMENT_DEPTH_EXT)%s\n", fogCoord ? " EXT_fog_coord not available!" : "");
-#endif
       return GL_FALSE;
    }
 
    if (fogCoord) {
-      glFogCoordf_ext = (GLFOGCOORDFEXTPROC)glutGetProcAddress("glFogCoordfEXT");
+      glFogCoordf_ext = (PFNGLFOGCOORDFEXTPROC)glutGetProcAddress("glFogCoordfEXT");
       glFogi(GL_FOG_COORDINATE_SOURCE_EXT, GL_FOG_COORDINATE_EXT);
-#if VERBOSE
-      printf("fog(GL_FOG_COORDINATE_EXT)\n");
-#endif
-   } else {
+   }
+   else {
       glFogi(GL_FOG_COORDINATE_SOURCE_EXT, GL_FRAGMENT_DEPTH_EXT);
-#if VERBOSE
-      printf("fog(GL_FRAGMENT_DEPTH_EXT)\n");
-#endif
    }
    return fogCoord;
 }
 
 
-#if ARRAYS
 /* could reuse vertices */
 static GLuint vertex_index[] = {
    /* Back */
@@ -172,19 +157,19 @@ static GLuint vertex_index[] = {
 
 static GLfloat vertex_pointer[][3] = {
    /* Back */
-   {-2.5f,-2.5f,-DEPTH}, { 2.5f,-2.5f,-DEPTH}, { 2.5f, 2.5f,-DEPTH}, {-2.5f, 2.5f,-DEPTH},
+   {-1.0f,-1.0f,-DEPTH}, { 1.0f,-1.0f,-DEPTH}, { 1.0f, 1.0f,-DEPTH}, {-1.0f, 1.0f,-DEPTH},
 
    /* Floor */
-   {-2.5f,-2.5f,-DEPTH}, { 2.5f,-2.5f,-DEPTH}, { 2.5f,-2.5f, DEPTH}, {-2.5f,-2.5f, DEPTH},
+   {-1.0f,-1.0f,-DEPTH}, { 1.0f,-1.0f,-DEPTH}, { 1.0f,-1.0f, 0.0}, {-1.0f,-1.0f, 0.0},
 
    /* Roof */
-   {-2.5f, 2.5f,-DEPTH}, { 2.5f, 2.5f,-DEPTH}, { 2.5f, 2.5f, DEPTH}, {-2.5f, 2.5f, DEPTH},
+   {-1.0f, 1.0f,-DEPTH}, { 1.0f, 1.0f,-DEPTH}, { 1.0f, 1.0f, 0.0}, {-1.0f, 1.0f, 0.0},
 
    /* Right */
-   { 2.5f,-2.5f, DEPTH}, { 2.5f, 2.5f, DEPTH}, { 2.5f, 2.5f,-DEPTH}, { 2.5f,-2.5f,-DEPTH},
+   { 1.0f,-1.0f, 0.0}, { 1.0f, 1.0f, 0.0}, { 1.0f, 1.0f,-DEPTH}, { 1.0f,-1.0f,-DEPTH},
 
    /* Left */
-   {-2.5f,-2.5f, DEPTH}, {-2.5f, 2.5f, DEPTH}, {-2.5f, 2.5f,-DEPTH}, {-2.5f,-2.5f,-DEPTH}
+   {-1.0f,-1.0f, 0.0}, {-1.0f, 1.0f, 0.0}, {-1.0f, 1.0f,-DEPTH}, {-1.0f,-1.0f,-DEPTH}
 };
 
 static GLfloat texcoord_pointer[][2] = {
@@ -192,118 +177,139 @@ static GLfloat texcoord_pointer[][2] = {
    {0.0f, 0.0f}, {1.0f, 0.0f}, {1.0f, 1.0f}, {0.0f, 1.0f},
 
    /* Floor */
-   {0.0f, 0.0f}, {1.0f, 0.0f}, {1.0f, 1.0f}, {0.0f, 1.0f},
+   {0.0f, 0.0f}, {1.0f, 0.0f}, {1.0f, DEPTH}, {0.0f, DEPTH},
 
    /* Roof */
-   {0.0f, 0.0f}, {1.0f, 0.0f}, {1.0f, 1.0f}, {0.0f, 1.0f},
+   {1.0f, 0.0f}, {0.0f, 0.0f}, {0.0f, DEPTH}, {1.0f, DEPTH},
 
    /* Right */
-   {0.0f, 0.0f}, {0.0f, 1.0f}, {1.0f, 1.0f}, {1.0f, 0.0f},
+   {0.0f, 1.0f}, {0.0f, 0.0f}, {DEPTH, 0.0f}, {DEPTH, 1.0f},
 
    /* Left */
-   {0.0f, 0.0f}, {0.0f, 1.0f}, {1.0f, 1.0f}, {1.0f, 0.0f}
+   {0.0f, 0.0f}, {0.0f, 1.0f}, {DEPTH, 1.0f}, {DEPTH, 0.0f}
 };
 
-static GLfloat fogcoord_pointer[][1] = {
+static GLfloat fogcoord_pointer[] = {
    /* Back */
-   {1.0f}, {1.0f}, {1.0f}, {1.0f},
+   DEPTH, DEPTH, DEPTH, DEPTH,
 
    /* Floor */
-   {1.0f}, {1.0f}, {0.0f}, {0.0f},
+   DEPTH, DEPTH, 0.0, 0.0,
 
    /* Roof */
-   {1.0f}, {1.0f}, {0.0f}, {0.0f},
+   DEPTH, DEPTH, 0.0, 0.0,
 
    /* Right */
-   {0.0f}, {0.0f}, {1.0f}, {1.0f},
+   0.0, 0.0, DEPTH, DEPTH,
 
    /* Left */
-   {0.0f}, {0.0f}, {1.0f}, {1.0f}
+   0.0, 0.0, DEPTH, DEPTH
 };
-#endif
 
 
-static void Display( void )
+static void
+Display( void )
 {
    glClear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
    glLoadIdentity ();
    
-   glTranslatef(0.0f, 0.0f, camz);
+   glTranslatef(0.0f, 0.0f, -camz);
 
-#if ARRAYS
-   glDrawElements(GL_QUADS, sizeof(vertex_index) / sizeof(vertex_index[0]), GL_UNSIGNED_INT, vertex_index);
-#else
-   /* Back */
-   glBegin(GL_QUADS);
-   glFogCoordf_ext(1.0f); glTexCoord2f(0.0f, 0.0f); glVertex3f(-2.5f,-2.5f,-DEPTH);
-   glFogCoordf_ext(1.0f); glTexCoord2f(1.0f, 0.0f); glVertex3f( 2.5f,-2.5f,-DEPTH);
-   glFogCoordf_ext(1.0f); glTexCoord2f(1.0f, 1.0f); glVertex3f( 2.5f, 2.5f,-DEPTH);
-   glFogCoordf_ext(1.0f); glTexCoord2f(0.0f, 1.0f); glVertex3f(-2.5f, 2.5f,-DEPTH);
-   glEnd();
+   SetFogMode(fogMode);
 
-   /* Floor */
-   glBegin(GL_QUADS);
-   glFogCoordf_ext(1.0f); glTexCoord2f(0.0f, 0.0f); glVertex3f(-2.5f,-2.5f,-DEPTH);
-   glFogCoordf_ext(1.0f); glTexCoord2f(1.0f, 0.0f); glVertex3f( 2.5f,-2.5f,-DEPTH);
-   glFogCoordf_ext(0.0f); glTexCoord2f(1.0f, 1.0f); glVertex3f( 2.5f,-2.5f, DEPTH);
-   glFogCoordf_ext(0.0f); glTexCoord2f(0.0f, 1.0f); glVertex3f(-2.5f,-2.5f, DEPTH);
-   glEnd();
+   glColor3f(1, 1, 1);
 
-   /* Roof */
-   glBegin(GL_QUADS);
-   glFogCoordf_ext(1.0f); glTexCoord2f(0.0f, 0.0f); glVertex3f(-2.5f, 2.5f,-DEPTH);
-   glFogCoordf_ext(1.0f); glTexCoord2f(1.0f, 0.0f); glVertex3f( 2.5f, 2.5f,-DEPTH);
-   glFogCoordf_ext(0.0f); glTexCoord2f(1.0f, 1.0f); glVertex3f( 2.5f, 2.5f, DEPTH);
-   glFogCoordf_ext(0.0f); glTexCoord2f(0.0f, 1.0f); glVertex3f(-2.5f, 2.5f, DEPTH);
-   glEnd();
+   if (Texture)
+      glEnable(GL_TEXTURE_2D);
 
-   /* Right */
-   glBegin(GL_QUADS);
-   glFogCoordf_ext(0.0f); glTexCoord2f(0.0f, 0.0f); glVertex3f( 2.5f,-2.5f, DEPTH);
-   glFogCoordf_ext(0.0f); glTexCoord2f(0.0f, 1.0f); glVertex3f( 2.5f, 2.5f, DEPTH);
-   glFogCoordf_ext(1.0f); glTexCoord2f(1.0f, 1.0f); glVertex3f( 2.5f, 2.5f,-DEPTH);
-   glFogCoordf_ext(1.0f); glTexCoord2f(1.0f, 0.0f); glVertex3f( 2.5f,-2.5f,-DEPTH);
-   glEnd();
+   if (Arrays) {
+      glEnableClientState(GL_VERTEX_ARRAY);
+      glEnableClientState(GL_TEXTURE_COORD_ARRAY);
+      glDrawElements(GL_QUADS, sizeof(vertex_index) / sizeof(vertex_index[0]),
+                     GL_UNSIGNED_INT, vertex_index);
+      glDisableClientState(GL_VERTEX_ARRAY);
+      glDisableClientState(GL_TEXTURE_COORD_ARRAY);
+   }
+   else {
+      /* Back */
+      glBegin(GL_QUADS);
+      glFogCoordf_ext(DEPTH); glTexCoord2f(0.0f, 0.0f); glVertex3f(-1.0f,-1.0f,-DEPTH);
+      glFogCoordf_ext(DEPTH); glTexCoord2f(1.0f, 0.0f); glVertex3f( 1.0f,-1.0f,-DEPTH);
+      glFogCoordf_ext(DEPTH); glTexCoord2f(1.0f, 1.0f); glVertex3f( 1.0f, 1.0f,-DEPTH);
+      glFogCoordf_ext(DEPTH); glTexCoord2f(0.0f, 1.0f); glVertex3f(-1.0f, 1.0f,-DEPTH);
+      glEnd();
+
+      /* Floor */
+      glBegin(GL_QUADS);
+      glFogCoordf_ext(DEPTH); glTexCoord2f(0.0f, 0.0f); glVertex3f(-1.0f,-1.0f,-DEPTH);
+      glFogCoordf_ext(DEPTH); glTexCoord2f(1.0f, 0.0f); glVertex3f( 1.0f,-1.0f,-DEPTH);
+      glFogCoordf_ext(0.0f); glTexCoord2f(1.0f,  DEPTH); glVertex3f( 1.0f,-1.0f,0.0);
+      glFogCoordf_ext(0.0f); glTexCoord2f(0.0f,  DEPTH); glVertex3f(-1.0f,-1.0f,0.0);
+      glEnd();
+
+      /* Roof */
+      glBegin(GL_QUADS);
+      glFogCoordf_ext(DEPTH); glTexCoord2f(1.0f, 0.0f); glVertex3f(-1.0f, 1.0f,-DEPTH);
+      glFogCoordf_ext(DEPTH); glTexCoord2f(0.0f, 0.0f); glVertex3f( 1.0f, 1.0f,-DEPTH);
+      glFogCoordf_ext(0.0f); glTexCoord2f(0.0f, DEPTH); glVertex3f( 1.0f, 1.0f,0.0);
+      glFogCoordf_ext(0.0f); glTexCoord2f(1.0f, DEPTH); glVertex3f(-1.0f, 1.0f,0.0);
+      glEnd();
+
+      /* Right */
+      glBegin(GL_QUADS);
+      glFogCoordf_ext(0.0f); glTexCoord2f(0.0f, 1.0f); glVertex3f( 1.0f,-1.0f,0.0);
+      glFogCoordf_ext(0.0f); glTexCoord2f(0.0f, 0.0f); glVertex3f( 1.0f, 1.0f,0.0);
+      glFogCoordf_ext(DEPTH); glTexCoord2f(DEPTH, 0.0f); glVertex3f( 1.0f, 1.0f,-DEPTH);
+      glFogCoordf_ext(DEPTH); glTexCoord2f(DEPTH, 1.0f); glVertex3f( 1.0f,-1.0f,-DEPTH);
+      glEnd();
+
+      /* Left */
+      glBegin(GL_QUADS);
+      glFogCoordf_ext(0.0f); glTexCoord2f(0.0f, 0.0f); glVertex3f(-1.0f,-1.0f,0.0);
+      glFogCoordf_ext(0.0f); glTexCoord2f(0.0f, 1.0f); glVertex3f(-1.0f, 1.0f,0.0);
+      glFogCoordf_ext(DEPTH); glTexCoord2f(DEPTH, 1.0f); glVertex3f(-1.0f, 1.0f,-DEPTH);
+      glFogCoordf_ext(DEPTH); glTexCoord2f(DEPTH, 0.0f); glVertex3f(-1.0f,-1.0f,-DEPTH);
+      glEnd();
+   }
 
-   /* Left */
-   glBegin(GL_QUADS);
-   glFogCoordf_ext(0.0f); glTexCoord2f(0.0f, 0.0f); glVertex3f(-2.5f,-2.5f, DEPTH);
-   glFogCoordf_ext(0.0f); glTexCoord2f(0.0f, 1.0f); glVertex3f(-2.5f, 2.5f, DEPTH);
-   glFogCoordf_ext(1.0f); glTexCoord2f(1.0f, 1.0f); glVertex3f(-2.5f, 2.5f,-DEPTH);
-   glFogCoordf_ext(1.0f); glTexCoord2f(1.0f, 0.0f); glVertex3f(-2.5f,-2.5f,-DEPTH);
-   glEnd();
-#endif
+   glDisable(GL_TEXTURE_2D);
+
+   PrintInfo();
 
    glutSwapBuffers();
 }
 
 
-static void Reshape( int width, int height )
+static void
+Reshape( int width, int height )
 {
    glViewport(0, 0, width, height);
    glMatrixMode(GL_PROJECTION);
    glLoadIdentity();
-   gluPerspective(45.0f, (GLfloat)(width)/(GLfloat)(height), 0.1f, 100.0f);
+   glFrustum(-1, 1, -1, 1, 1.0, 100);
    glMatrixMode(GL_MODELVIEW);
    glLoadIdentity();
 }
 
 
-static void Key( unsigned char key, int x, int y )
+static void
+Key( unsigned char key, int x, int y )
 {
    (void) x;
    (void) y;
    switch (key) {
+      case 'a':
+         Arrays = !Arrays;
+         break;
       case 'f':
+      case 'm':
          fogMode = SetFogMode(fogMode + 1);
          break;
-      case '+':
-         if (fogDensity < 1.0) {
-            fogDensity += 0.05;
-         }
+      case 'D':
+         fogDensity += 0.05;
          SetFogMode(fogMode);
          break;
-      case '-':
+      case 'd':
          if (fogDensity > 0.0) {
             fogDensity -= 0.05;
          }
@@ -311,31 +317,43 @@ static void Key( unsigned char key, int x, int y )
          break;
       case 's':
          if (fogStart > 0.0) {
-            fogStart -= 1.0;
+            fogStart -= 0.25;
          }
          SetFogMode(fogMode);
          break;
       case 'S':
-         if (fogStart < fogEnd) {
-            fogStart += 1.0;
+         if (fogStart < 100.0) {
+            fogStart += 0.25;
          }
          SetFogMode(fogMode);
          break;
       case 'e':
-         if (fogEnd > fogStart) {
-            fogEnd -= 1.0;
+         if (fogEnd > 0.0) {
+            fogEnd -= 0.25;
          }
          SetFogMode(fogMode);
          break;
       case 'E':
          if (fogEnd < 100.0) {
-            fogEnd += 1.0;
+            fogEnd += 0.25;
          }
          SetFogMode(fogMode);
          break;
       case 'c':
          fogCoord = SetFogCoord(fogCoord ^ GL_TRUE);
          break;
+      case 't':
+         Texture = !Texture;
+         break;
+      case 'z':
+         camz -= 0.1;
+         break;
+      case 'Z':
+         camz += 0.1;
+         break;
+      case 'r':
+         Reset();
+         break;
       case 27:
          exit(0);
          break;
@@ -344,37 +362,28 @@ static void Key( unsigned char key, int x, int y )
 }
 
 
-static void SpecialKey( int key, int x, int y )
+static void
+Init(void)
 {
-   (void) x;
-   (void) y;
-   switch (key) {
-      case GLUT_KEY_UP:
-         if (camz < (DEPTH - 1.0)) {
-            camz += 1.0f;
-         }
-         break;
-      case GLUT_KEY_DOWN:
-         if (camz > -19.0) {
-            camz -= 1.0f;
-         }
-         break;
-   }
-   glutPostRedisplay();
-}
+   static const GLubyte teximage[2][2][4] = {
+      { { 255, 255, 255, 255}, { 128, 128, 128, 255} },
+      { { 128, 128, 128, 255}, { 255, 255, 255, 255} }
+   };
 
+   printf("GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER));
 
-static void Init( void )
-{
    have_fog_coord = glutExtensionSupported("GL_EXT_fog_coord");
-
-   if (BuildTexture(TEXTURE_FILE, texture) == -1) {
-      exit(1);
+   if (!have_fog_coord) {
+      printf("GL_EXT_fog_coord not supported!\n");
    }
 
-   glEnable(GL_TEXTURE_2D);
-   glClearColor(0.0f, 0.0f, 0.0f, 0.5f);
-   glClearDepth(1.0f);
+   glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 2, 2, 0,
+                GL_RGBA, GL_UNSIGNED_BYTE, teximage);
+   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+
+   glClearColor(0.1f, 0.1f, 0.1f, 0.0f);
+
    glDepthFunc(GL_LEQUAL);
    glEnable(GL_DEPTH_TEST);
    glShadeModel(GL_SMOOTH);
@@ -383,11 +392,8 @@ static void Init( void )
    glFogfv(GL_FOG_COLOR, fogColor);
    glHint(GL_FOG_HINT, GL_NICEST);
    fogCoord = SetFogCoord(GL_TRUE); /* try to enable fog_coord */
-   fogMode = SetFogMode(2);         /* GL_EXP */
-
-   camz = -19.0f;
+   fogMode = SetFogMode(1);
 
-#if ARRAYS
    glEnableClientState(GL_VERTEX_ARRAY);
    glVertexPointer(3, GL_FLOAT, 0, vertex_pointer);
 
@@ -395,24 +401,24 @@ static void Init( void )
    glTexCoordPointer(2, GL_FLOAT, 0, texcoord_pointer);
 
    if (have_fog_coord) {
-      glFogCoordPointer_ext = (GLFOGCOORDPOINTEREXTPROC)glutGetProcAddress("glFogCoordPointerEXT");
+      glFogCoordPointer_ext = (PFNGLFOGCOORDPOINTEREXTPROC)glutGetProcAddress("glFogCoordPointerEXT");
       glEnableClientState(GL_FOG_COORDINATE_ARRAY_EXT);
       glFogCoordPointer_ext(GL_FLOAT, 0, fogcoord_pointer);
    }
-#endif
+
+   Reset();
 }
 
 
-int main( int argc, char *argv[] )
+int
+main( int argc, char *argv[] )
 {
    glutInit( &argc, argv );
-   glutInitWindowPosition( 0, 0 );
-   glutInitWindowSize( 640, 480 );
+   glutInitWindowSize( 600, 600 );
    glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH );
    glutCreateWindow(argv[0]);
    glutReshapeFunc( Reshape );
    glutKeyboardFunc( Key );
-   glutSpecialFunc( SpecialKey );
    glutDisplayFunc( Display );
    Init();
    glutMainLoop();
diff --git a/progs/demos/fplight.c b/progs/demos/fplight.c
index c7a38248d38..fb510cccc8a 100644
--- a/progs/demos/fplight.c
+++ b/progs/demos/fplight.c
@@ -24,7 +24,7 @@ static GLuint VertProg;
 static GLboolean Anim = GL_TRUE;
 static GLboolean Wire = GL_FALSE;
 static GLboolean PixelLight = GL_TRUE;
-
+static GLint Win;
 static GLfloat Xrot = 0, Yrot = 0;
 
 
@@ -136,8 +136,8 @@ static void Key( unsigned char key, int x, int y )
          }
          break;
       case 27:
+         glutDestroyWindow(Win);
          exit(0);
-         break;
    }
    glutPostRedisplay();
 }
@@ -272,7 +272,7 @@ int main( int argc, char *argv[] )
    glutInitWindowPosition( 0, 0 );
    glutInitWindowSize( 200, 200 );
    glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH );
-   glutCreateWindow(argv[0]);
+   Win = glutCreateWindow(argv[0]);
    glutReshapeFunc( Reshape );
    glutKeyboardFunc( Key );
    glutSpecialFunc( SpecialKey );
diff --git a/progs/demos/fslight.c b/progs/demos/fslight.c
index 736cc48ac67..e6d83bf8fb3 100644
--- a/progs/demos/fslight.c
+++ b/progs/demos/fslight.c
@@ -45,7 +45,7 @@ static GLint uTexture;
 
 static GLuint SphereList, RectList, CurList;
 static GLint win = 0;
-static GLboolean anim = GL_FALSE;
+static GLboolean anim = GL_TRUE;
 static GLboolean wire = GL_FALSE;
 static GLboolean pixelLight = GL_TRUE;
 
@@ -58,7 +58,7 @@ static GLfloat xRot = 90.0f, yRot = 0.0f;
 static void
 normalize(GLfloat *dst, const GLfloat *src)
 {
-   GLfloat len = sqrtf(src[0] * src[0] + src[1] * src[1] + src[2] * src[2]);
+   GLfloat len = sqrt(src[0] * src[0] + src[1] * src[1] + src[2] * src[2]);
    dst[0] = src[0] / len;
    dst[1] = src[1] / len;
    dst[2] = src[2] / len;
@@ -477,8 +477,8 @@ Init(void)
 
    version = (const char *) glGetString(GL_VERSION);
    if (version[0] != '2' || version[1] != '.') {
-      printf("Warning: this program expects OpenGL 2.0\n");
-      /*exit(1);*/
+      printf("This program requires OpenGL 2.x, found %s\n", version);
+      exit(1);
    }
 
    GetExtensionFuncs();
@@ -579,6 +579,8 @@ Init(void)
 
 #if 0
    TestFunctions();
+#else
+   (void) TestFunctions;
 #endif
 }
 
@@ -603,7 +605,7 @@ main(int argc, char *argv[])
 {
    glutInit(&argc, argv);
    glutInitWindowPosition( 0, 0);
-   glutInitWindowSize(100, 100);
+   glutInitWindowSize(200, 200);
    glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
    win = glutCreateWindow(argv[0]);
    glutReshapeFunc(Reshape);
diff --git a/progs/demos/shadowtex.c b/progs/demos/shadowtex.c
index b32fb45b4fa..59253e8c1e3 100644
--- a/progs/demos/shadowtex.c
+++ b/progs/demos/shadowtex.c
@@ -9,6 +9,7 @@
  * Added GL_EXT_packed_depth_stencil support on 15 March 2006.
  * Added GL_EXT_framebuffer_object support on 27 March 2006.
  * Removed old SGIX extension support on 5 April 2006.
+ * Added vertex / fragment program support on 7 June 2007 (Ian Romanick).
  *
  * Copyright (C) 1999-2006  Brian Paul   All Rights Reserved.
  *
@@ -34,6 +35,7 @@
 #include <assert.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <string.h>
 #include <math.h>
 #include <GL/glut.h>
 #include "showbuffer.h"
@@ -67,8 +69,27 @@ static GLboolean NeedNewShadowMap = GL_FALSE;
 static GLuint ShadowTexture, GrayTexture;
 static GLuint ShadowFBO;
 
+static GLfloat lightModelview[16];
+static GLfloat lightProjection[16];
+
+static GLuint vert_prog;
+static GLuint frag_progs[3];
+static GLuint curr_frag = 0;
+static GLuint max_frag = 1;
+
+#define NUM_FRAG_MODES 3
+static const char *FragProgNames[] = {
+   "fixed-function",
+   "program without \"OPTION ARB_fragment_program_shadow\"",
+   "program with \"OPTION ARB_fragment_program_shadow\"",
+};
+
 static GLboolean HaveFBO = GL_FALSE;
 static GLboolean UseFBO = GL_FALSE;
+static GLboolean HaveVP = GL_FALSE;
+static GLboolean HaveFP = GL_FALSE;
+static GLboolean HaveFP_Shadow = GL_FALSE;
+static GLboolean UseVP = GL_FALSE;
 static GLboolean HavePackedDepthStencil = GL_FALSE;
 static GLboolean UsePackedDepthStencil = GL_FALSE;
 static GLboolean HaveEXTshadowFuncs = GL_FALSE;
@@ -91,6 +112,103 @@ static GLuint DisplayMode;
 
 
 
+#define MAT4_MUL(dest_vec, src_mat, src_vec) \
+    "DP4	" dest_vec ".x, " src_mat "[0], " src_vec ";\n" \
+    "DP4	" dest_vec ".y, " src_mat "[1], " src_vec ";\n" \
+    "DP4	" dest_vec ".z, " src_mat "[2], " src_vec ";\n" \
+    "DP4	" dest_vec ".w, " src_mat "[3], " src_vec ";\n"
+
+#define MAT3_MUL(dest_vec, src_mat, src_vec) \
+    "DP3	" dest_vec ".x, " src_mat "[0], " src_vec ";\n" \
+    "DP3	" dest_vec ".y, " src_mat "[1], " src_vec ";\n" \
+    "DP3	" dest_vec ".z, " src_mat "[2], " src_vec ";\n"
+
+#define NORMALIZE(dest, src) \
+    "DP3	" dest ".w, " src ", " src ";\n" \
+    "RSQ	" dest ".w, " dest ".w;\n" \
+    "MUL	" dest ", " src ", " dest ".w;\n"
+   
+/**
+ * Vertex program for shadow mapping.
+ */
+static const char vert_code[] =
+    "!!ARBvp1.0\n"
+    "ATTRIB iPos        = vertex.position;\n"
+    "ATTRIB iNorm       = vertex.normal;\n"
+
+    "PARAM  mvinv[4]    = { state.matrix.modelview.invtrans };\n"
+    "PARAM  mvp[4]      = { state.matrix.mvp };\n"
+    "PARAM  mv[4]       = { state.matrix.modelview };\n"
+    "PARAM  texmat[4]   = { state.matrix.texture[0] };\n"
+    "PARAM  lightPos    = state.light[0].position;\n"
+    "PARAM  ambientCol  = state.lightprod[0].ambient;\n"
+    "PARAM  diffuseCol  = state.lightprod[0].diffuse;\n"
+
+    "TEMP   n, lightVec;\n"
+    "ALIAS  V = lightVec;\n"
+    "ALIAS  NdotL = n;\n"
+
+    "OUTPUT oPos = result.position;\n"
+    "OUTPUT oColor = result.color;\n"
+    "OUTPUT oTex = result.texcoord[0];\n"
+
+    /* Transform the vertex to clip coordinates. */
+    MAT4_MUL("oPos", "mvp",    "iPos")
+
+    /* Transform the vertex to eye coordinates. */
+    MAT4_MUL("V",    "mv",     "iPos")
+
+    /* Transform the vertex to projected light coordinates. */
+    MAT4_MUL("oTex", "texmat", "iPos")
+
+    /* Transform the normal to eye coordinates. */
+    MAT3_MUL("n",    "mvinv",  "iNorm")
+
+    /* Calculate the vector from the vertex to the light in eye
+     * coordinates.
+     */
+    "SUB	lightVec, lightPos, V;\n"
+    NORMALIZE("lightVec", "lightVec")
+
+    /* Compute diffuse lighting coefficient.
+     */
+    "DP3	NdotL.x, n, lightVec;\n"
+    "MAX	NdotL.x, NdotL.x, {0.0};\n"
+    "MIN	NdotL.x, NdotL.x, {1.0};\n"
+
+    /* Accumulate color contributions.
+     */
+    "MOV	oColor, diffuseCol;\n"
+    "MAD	oColor.xyz, NdotL.x, diffuseCol, ambientCol;\n"
+    "END\n"
+    ;
+
+static const char frag_code[] =
+    "!!ARBfp1.0\n"
+
+    "TEMP   shadow, temp;\n"
+
+    "TXP	shadow, fragment.texcoord[0], texture[0], 2D;\n"
+    "RCP	temp.x, fragment.texcoord[0].w;\n"
+    "MUL	temp.x, temp.x, fragment.texcoord[0].z;\n"
+    "SGE	shadow, shadow.x, temp.x;\n"
+    "MUL	result.color.rgb, fragment.color, shadow.x;\n"
+    "MOV	result.color.a, fragment.color;\n"
+    "END\n"
+    ;
+
+static const char frag_shadow_code[] =
+    "!!ARBfp1.0\n"
+    "OPTION ARB_fragment_program_shadow;\n"
+
+    "TEMP   shadow;\n"
+
+    "TXP	shadow, fragment.texcoord[0], texture[0], SHADOW2D;\n"
+    "MUL	result.color.rgb, fragment.color, shadow.x;\n"
+    "MOV	result.color.a, fragment.color.a;\n"
+    "END\n"
+    ;
+
 static void
 DrawScene(void)
 {
@@ -134,27 +252,56 @@ DrawScene(void)
 }
 
 
-/*
- * Load the GL_TEXTURE matrix with the projection from the light
- * source's point of view.
+/**
+ * Calculate modelview and project matrices for the light
+ * 
+ * Stores the results in \c lightProjection (projection matrix) and
+ * \c lightModelview (modelview matrix).
  */
 static void
 MakeShadowMatrix(const GLfloat lightPos[4], const GLfloat spotDir[3],
                  GLfloat spotAngle, GLfloat shadowNear, GLfloat shadowFar)
 {
-   GLfloat d;
-   
-   glMatrixMode(GL_TEXTURE);
+   /* compute frustum to enclose spot light cone */
+   const GLfloat d = shadowNear * tan(spotAngle);
+
+   glMatrixMode(GL_PROJECTION);
+   glPushMatrix();
    glLoadIdentity();
-   glTranslatef(0.5, 0.5, 0.5 + Bias);
-   glScalef(0.5, 0.5, 0.5);
-   d = shadowNear * tan(spotAngle);
    glFrustum(-d, d, -d, d, shadowNear, shadowFar);
+   glGetFloatv(GL_PROJECTION_MATRIX, lightProjection);
+   glPopMatrix();
+
+   glMatrixMode(GL_MODELVIEW);
+   glPushMatrix();
+   glLoadIdentity();
    gluLookAt(lightPos[0], lightPos[1], lightPos[2],
              lightPos[0] + spotDir[0],
              lightPos[1] + spotDir[1],
              lightPos[2] + spotDir[2],
-             0, 1, 0);
+             0.0, 1.0, 0.0);
+   glGetFloatv(GL_MODELVIEW_MATRIX, lightModelview);
+   glPopMatrix();
+}
+
+
+/**
+ * Load \c GL_TEXTURE matrix with light's MVP matrix.
+ */
+static void SetShadowTextureMatrix(void)
+{
+   static const GLfloat biasMatrix[16] = {
+      0.5, 0.0, 0.0, 0.0,
+      0.0, 0.5, 0.0, 0.0,
+      0.0, 0.0, 0.5, 0.0,
+      0.5, 0.5, 0.5, 1.0,
+   };
+
+   glMatrixMode(GL_TEXTURE);
+   glLoadMatrixf(biasMatrix);
+   glTranslatef(0.0, 0.0, Bias);
+   glMultMatrixf(lightProjection);
+   glMultMatrixf(lightModelview);
    glMatrixMode(GL_MODELVIEW);
 }
 
@@ -258,7 +405,6 @@ RenderShadowMap(void)
 {
    GLenum depthFormat; /* GL_DEPTH_COMPONENT or GL_DEPTH_STENCIL_EXT */
    GLenum depthType; /* GL_UNSIGNED_INT_24_8_EXT or GL_UNSIGNED_INT */
-   float d;
 
    if (WindowWidth >= 1024 && WindowHeight >= 1024) {
       ShadowTexWidth = ShadowTexHeight = 1024;
@@ -283,27 +429,34 @@ RenderShadowMap(void)
       depthType = GL_UNSIGNED_INT;
    }
 
-   /* compute frustum to enclose spot light cone */
-   d = ShadowNear * tan(SpotAngle);
-
    glMatrixMode(GL_PROJECTION);
-   glLoadIdentity();
-   glFrustum(-d, d, -d, d, ShadowNear, ShadowFar);
+   glLoadMatrixf(lightProjection);
+
    glMatrixMode(GL_MODELVIEW);
-   glLoadIdentity();
-   gluLookAt(LightPos[0], LightPos[1], LightPos[2], /* from */
-             0, 0, 0, /* target */
-             0, 1, 0); /* up */
+   glLoadMatrixf(lightModelview);
 
    if (UseFBO) {
+      GLenum fbo_status;
+
       glTexImage2D(GL_TEXTURE_2D, 0, depthFormat,
                    ShadowTexWidth, ShadowTexHeight, 0,
                    depthFormat, depthType, NULL);
+
+      /* Set the filter mode so that the texture is texture-complete.
+       * Otherwise it will cause the framebuffer to fail the framebuffer
+       * completeness test.
+       */
+      glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+
       glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, ShadowFBO);
       glDrawBuffer(GL_NONE);
       glReadBuffer(GL_NONE);
-      assert(glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT)
-             == GL_FRAMEBUFFER_COMPLETE_EXT);
+
+      fbo_status = glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT);
+      if (fbo_status != GL_FRAMEBUFFER_COMPLETE_EXT) {
+         fprintf(stderr, "FBO not complete!  status = 0x%04x\n", fbo_status);
+         assert(fbo_status == GL_FRAMEBUFFER_COMPLETE_EXT);
+      }
    }
 
    assert(!glIsEnabled(GL_TEXTURE_1D));
@@ -376,10 +529,8 @@ ShowShadowMap(void)
    DisableTexgen();
 
    /* interpret texture's depth values as luminance values */
-#if defined(GL_ARB_shadow)
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_COMPARE_MODE_ARB, GL_NONE);
    glTexParameteri(GL_TEXTURE_2D, GL_DEPTH_TEXTURE_MODE_ARB, GL_LUMINANCE);
-#endif
    glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
 
    glBegin(GL_POLYGON);
@@ -407,6 +558,7 @@ Display(void)
                    LightPos, SpotDir);
 
    if (NeedNewShadowMap) {
+      MakeShadowMatrix(LightPos, SpotDir, SpotAngle, ShadowNear, ShadowFar);
       RenderShadowMap();
       NeedNewShadowMap = GL_FALSE;
    }
@@ -444,12 +596,11 @@ Display(void)
       }
 
       if (DisplayMode == SHOW_DEPTH_MAPPING) {
-#if defined(GL_ARB_shadow)
          glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_COMPARE_MODE_ARB, GL_NONE);
-#endif
          glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
          glEnable(GL_TEXTURE_2D);
-         MakeShadowMatrix(LightPos, SpotDir, SpotAngle, ShadowNear, ShadowFar);
+
+         SetShadowTextureMatrix();
          EnableIdentityTexgen();
       }
       else if (DisplayMode == SHOW_DISTANCE) {
@@ -463,20 +614,42 @@ Display(void)
       }
       else {
          assert(DisplayMode == SHOW_SHADOWS);
-#if defined(GL_ARB_shadow)
          glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_COMPARE_MODE_ARB,
                          GL_COMPARE_R_TO_TEXTURE_ARB);
-#endif
-         glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
+
+         if (curr_frag > 0) {
+            glEnable(GL_FRAGMENT_PROGRAM_ARB);
+         }
+         else {
+            glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
+         }
          glEnable(GL_TEXTURE_2D);
-         MakeShadowMatrix(LightPos, SpotDir, SpotAngle, ShadowNear, ShadowFar);
-         EnableIdentityTexgen();
+
+         SetShadowTextureMatrix();
+
+         if (UseVP) {
+            glEnable(GL_VERTEX_PROGRAM_ARB);
+         }
+         else {
+            glEnable(GL_LIGHTING);
+            EnableIdentityTexgen();
+         }
       }
 
       DrawScene();
 
-      DisableTexgen();
-      glDisable(GL_TEXTURE_1D);
+      if (UseVP) {
+         glDisable(GL_VERTEX_PROGRAM_ARB);
+      }
+      else {
+         DisableTexgen();
+         glDisable(GL_LIGHTING);
+      }
+
+      if (curr_frag > 0) {
+         glDisable(GL_FRAGMENT_PROGRAM_ARB);
+      }
+
       glDisable(GL_TEXTURE_2D);
    }
 
@@ -548,6 +721,14 @@ Key(unsigned char key, int x, int y)
       case 'm':
          DisplayMode = SHOW_DEPTH_MAPPING;
          break;
+      case 'M':
+         curr_frag = (1 + curr_frag) % max_frag;
+         printf("Using fragment %s\n", FragProgNames[curr_frag]);
+
+         if (HaveFP) {
+            glBindProgramARB(GL_FRAGMENT_PROGRAM_ARB, frag_progs[curr_frag]);
+         }
+         break;
       case 'n':
       case 's':
       case ' ':
@@ -559,10 +740,8 @@ Key(unsigned char key, int x, int y)
             if (Operator >= 8)
                Operator = 0;
             printf("Operator: %s\n", OperatorName[Operator]);
-#if defined(GL_ARB_shadow)
             glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_COMPARE_FUNC_ARB,
                             OperatorFunc[Operator]);
-#endif
          }
          break;
       case 'p':
@@ -579,6 +758,11 @@ Key(unsigned char key, int x, int y)
             NeedNewShadowMap = GL_TRUE;
          }
          break;
+      case 'v':
+         UseVP = !UseVP && HaveVP;
+         printf("Using vertex %s mode.\n",
+                UseVP ? "program" : "fixed-function");
+         break;
       case 'z':
          Zrot -= step;
          break;
@@ -633,28 +817,62 @@ SpecialKey(int key, int x, int y)
 }
 
 
+/* A helper for finding errors in program strings */
+static int FindLine( const char *program, int position )
+{
+   int i, line = 1;
+   for (i = 0; i < position; i++) {
+      if (program[i] == '\n')
+         line++;
+   }
+   return line;
+}
+
+
+static GLuint
+compile_program(GLenum target, const char *code)
+{
+   GLuint p;
+   GLint errorPos;
+
+
+   glGenProgramsARB(1, & p);
+
+   glBindProgramARB(target, p);
+   glProgramStringARB(target, GL_PROGRAM_FORMAT_ASCII_ARB,
+                      strlen(code), code);
+   glGetIntegerv(GL_PROGRAM_ERROR_POSITION_ARB, &errorPos);
+   if (glGetError() != GL_NO_ERROR || errorPos != -1) {
+      int l = FindLine(code, errorPos);
+      printf("Fragment Program Error (pos=%d line=%d): %s\n", errorPos, l,
+             (char *) glGetString(GL_PROGRAM_ERROR_STRING_ARB));
+      exit(0);
+   }
+
+   glBindProgramARB(target, 0);
+   return p;
+}
+
 static void
 Init(void)
 {
    static const GLfloat borderColor[4] = {1.0, 0.0, 0.0, 0.0};
 
-#if defined(GL_ARB_depth_texture) && defined(GL_ARB_shadow)
    if (!glutExtensionSupported("GL_ARB_depth_texture") ||
        !glutExtensionSupported("GL_ARB_shadow")) {
-#else
-   if (1) {
-#endif
       printf("Sorry, this demo requires the GL_ARB_depth_texture and GL_ARB_shadow extensions\n");
       exit(1);
    }
    printf("Using GL_ARB_depth_texture and GL_ARB_shadow\n");
 
-#if defined(GL_ARB_shadow_ambient)
+   HaveVP = glutExtensionSupported("GL_ARB_vertex_program");
+   HaveFP = glutExtensionSupported("GL_ARB_fragment_program");
+   HaveFP_Shadow = glutExtensionSupported("GL_ARB_fragment_program_shadow");
+
    HaveShadowAmbient = glutExtensionSupported("GL_ARB_shadow_ambient");
    if (HaveShadowAmbient) {
       printf("and GL_ARB_shadow_ambient\n");
    }
-#endif
 
    HaveEXTshadowFuncs = glutExtensionSupported("GL_EXT_shadow_funcs");
 
@@ -677,15 +895,12 @@ Init(void)
    glTexParameterfv(GL_TEXTURE_2D, GL_TEXTURE_BORDER_COLOR, borderColor);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);
-#if defined(GL_ARB_shadow)
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_COMPARE_MODE_ARB,
                    GL_COMPARE_R_TO_TEXTURE_ARB);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_COMPARE_FUNC_ARB, GL_LEQUAL);
-#endif
+
    if (HaveShadowAmbient) {
-#if defined(GL_ARB_shadow_ambient)
       glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_COMPARE_FAIL_VALUE_ARB, 0.3);
-#endif
    }
 
 #if defined(GL_EXT_framebuffer_object)
@@ -720,6 +935,25 @@ Init(void)
                    256, 0, GL_LUMINANCE, GL_UNSIGNED_BYTE, image);
    }
 
+   if (HaveVP) {
+      vert_prog = compile_program(GL_VERTEX_PROGRAM_ARB, vert_code);
+      glBindProgramARB(GL_VERTEX_PROGRAM_ARB, vert_prog);
+   }
+
+   max_frag = 1;
+   frag_progs[0] = 0;
+
+   if (HaveFP) {
+      frag_progs[1] = compile_program(GL_FRAGMENT_PROGRAM_ARB, frag_code);
+      max_frag = 2;
+   }
+   
+   if (HaveFP && HaveFP_Shadow) {
+      frag_progs[2] = compile_program(GL_FRAGMENT_PROGRAM_ARB, 
+                                      frag_shadow_code);
+      max_frag = 3;
+   }
+
    glEnable(GL_DEPTH_TEST);
    glEnable(GL_LIGHTING);
    glEnable(GL_LIGHT0);
@@ -738,6 +972,8 @@ PrintHelp(void)
    printf("  f = toggle nearest/bilinear texture filtering\n");
    printf("  b/B = decrease/increase shadow map Z bias\n");
    printf("  p = toggle use of packed depth/stencil\n");
+   printf("  M = cycle through fragment program modes\n");
+   printf("  v = toggle vertex program modes\n");
    printf("  cursor keys = rotate scene\n");
    printf("  <shift> + cursor keys = rotate light source\n");
    if (HaveEXTshadowFuncs)
diff --git a/progs/demos/spriteblast.c b/progs/demos/spriteblast.c
index f0d3d0dfd41..5ad8e4d9a94 100644
--- a/progs/demos/spriteblast.c
+++ b/progs/demos/spriteblast.c
@@ -333,13 +333,13 @@ menu(int option)
     smooth = 0;
     break;
   case 10:
-    glPointSize(4.0);
+    glPointSize(16.0);
     break;
   case 11:
-    glPointSize(8.0);
+    glPointSize(32.0);
     break;
   case 12:
-    glPointSize(16.0);
+    glPointSize(64.0);
     break;
   case 13:
     spin = 1 - spin;
@@ -411,19 +411,19 @@ key(unsigned char c, int x, int y)
     glutPostRedisplay();
     break;
   case '1':
-    glPointSize(2.0);
+    glPointSize(16.0);
     glutPostRedisplay();
     break;
   case '2':
-    glPointSize(4.0);
+    glPointSize(32.0);
     glutPostRedisplay();
     break;
   case '3':
-    glPointSize(8.0);
+    glPointSize(64.0);
     glutPostRedisplay();
     break;
   case '4':
-    glPointSize(16.0);
+    glPointSize(128.0);
     glutPostRedisplay();
     break;
   case 27:
@@ -526,9 +526,9 @@ main(int argc, char **argv)
   glutAddMenuEntry("Threshold 10", 7);
   glutAddMenuEntry("Point smooth on", 8);
   glutAddMenuEntry("Point smooth off", 9);
-  glutAddMenuEntry("Point size 4", 10);
-  glutAddMenuEntry("Point size 8", 11);
-  glutAddMenuEntry("Point size 16", 12);
+  glutAddMenuEntry("Point size 16", 10);
+  glutAddMenuEntry("Point size 32", 11);
+  glutAddMenuEntry("Point size 64", 12);
   glutAddMenuEntry("Toggle spin", 13);
   glutAddMenuEntry("200 points ", 14);
   glutAddMenuEntry("500 points ", 15);
@@ -544,7 +544,7 @@ main(int argc, char **argv)
   glEnable(GL_DEPTH_TEST);
   glEnable(GL_POINT_SMOOTH);
   glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
-  glPointSize(16.0);
+  glPointSize(32.0);
 #ifdef GL_ARB_point_parameters
   glPointParameterfvARB(GL_POINT_DISTANCE_ATTENUATION_ARB, theQuad);
 #endif
diff --git a/progs/demos/tessdemo.c b/progs/demos/tessdemo.c
index 26403eee0a2..f71cea12744 100644
--- a/progs/demos/tessdemo.c
+++ b/progs/demos/tessdemo.c
@@ -4,10 +4,10 @@
  * Updated for GLU 1.3 tessellation by Gareth Hughes <[email protected]>
  */
 
-#include <GL/glut.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <GL/glut.h>
 
 #define MAX_POINTS	256
 #define MAX_CONTOURS	32