Merge branch 'master' into glsl-pp-rework-1glsl-pp-rework-1

35 files changed, 1193 insertions, 579 deletions

diff --git a/progs/glsl/.gitignore b/progs/glsl/.gitignore
index 39d90c23ac..986775bac2 100644
--- a/progs/glsl/.gitignore
+++ b/progs/glsl/.gitignore
@@ -22,6 +22,7 @@ samplers_array
 shaderutil.c
 shaderutil.h
 shadow_sampler
+shtest
 skinning
 texaaline
 texdemo1
diff --git a/progs/glsl/Makefile b/progs/glsl/Makefile
index f97cdb6942..8103a5cbca 100644
--- a/progs/glsl/Makefile
+++ b/progs/glsl/Makefile
@@ -10,10 +10,15 @@ LIB_DEP = \
 	$(TOP)/$(LIB_DIR)/$(GLU_LIB_NAME) \
 	$(TOP)/$(LIB_DIR)/$(GLUT_LIB_NAME)
 
-LIBS = -L$(TOP)/$(LIB_DIR) -l$(GLUT_LIB) -l$(GLU_LIB) -l$(GL_LIB) $(APP_LIB_DEPS)
+LIBS = -L$(TOP)/$(LIB_DIR) -l$(GLUT_LIB) -l$(GLEW_LIB) -l$(GLU_LIB) -l$(GL_LIB) $(APP_LIB_DEPS)
 
 INCLUDE_DIRS = -I$(TOP)/progs/util
 
+# using : to avoid APP_CC pointing to CC loop
+CC:=$(APP_CC)
+CFLAGS += -I$(INCDIR)
+LDLIBS=$(LIBS)
+
 DEMO_SOURCES = \
 	array.c \
 	bitmap.c \
@@ -32,7 +37,9 @@ DEMO_SOURCES = \
 	pointcoord.c \
 	points.c \
 	samplers.c \
+	samplers_array.c \
 	shadow_sampler.c \
+	shtest.c \
 	skinning.c \
 	texaaline.c \
 	texdemo1.c \
@@ -52,28 +59,16 @@ UTIL_SOURCES = \
 	readtex.c
 
 UTIL_OBJS = $(UTIL_SOURCES:.c=.o)
-
-
+PROG_OBJS = $(DEMO_SOURCES:.c=.o)
 PROGS = $(DEMO_SOURCES:%.c=%)
 
-
-
-##### RULES #####
-
-# make .o file from .c file:
-.c.o:
-	$(APP_CC) -c -I$(INCDIR) $(CFLAGS) $< -o $@
-
-
-# make executable from .o files
-.o:
-	$(APP_CC) $(INCLUDES) $(CFLAGS) $(LDFLAGS) $< $(UTIL_OBJS) $(LIBS) -o $@
-
-
 ##### TARGETS #####
 
 default: $(PROGS)
 
+$(PROG_OBJS): $(UTIL_HEADERS)
+
+$(PROGS): $(UTIL_OBJS)
 
 clean:
 	-rm -f $(PROGS)
@@ -83,9 +78,11 @@ clean:
 	-rm -f readtex.*
 
 
-
 ##### Extra dependencies
 
+samplers_array.o: samplers.c
+	$(APP_CC) $(CFLAGS) -DSAMPLERS_ARRAY $< -c -o $@
+
 extfuncs.h: $(TOP)/progs/util/extfuncs.h
 	cp $< .
 
@@ -101,138 +98,3 @@ shaderutil.c: $(TOP)/progs/util/shaderutil.c
 shaderutil.h: $(TOP)/progs/util/shaderutil.h
 	cp $< .
 
-
-
-array.o: $(UTIL_HEADERS)
-
-array: array.o  $(UTIL_OBJS)
-
-
-bitmap.o: $(UTIL_HEADERS)
-
-bitmap: bitmap.o $(UTIL_OBJS)
-
-
-brick.o: $(UTIL_HEADERS)
-
-brick: brick.o $(UTIL_OBJS)
-
-
-bump.o: $(UTIL_HEADERS)
-
-bump: bump.o $(UTIL_OBJS)
-
-
-convolutions.o: $(UTIL_HEADERS)
-
-convolutions: convolutions.o $(UTIL_OBJS)
-
-
-deriv.o: deriv.c $(UTIL_HEADERS)
-
-deriv: deriv.o $(UTIL_OBJS)
-
-
-identity.o: $(UTIL_HEADERS)
-
-identity: identity.o $(UTIL_OBJS)
-
-
-fragcoord.o: $(UTIL_HEADERS)
-
-fragcoord: fragcoord.o $(UTIL_OBJS)
-
-
-linktest.o: $(UTIL_HEADERS)
-
-linktest: linktest.o $(UTIL_OBJS)
-
-
-mandelbrot.o: $(UTIL_HEADERS)
-
-mandelbrot: mandelbrot.o $(UTIL_OBJS)
-
-
-multinoise.o: $(UTIL_HEADERS)
-
-multinoise: multinoise.o $(UTIL_OBJS)
-
-
-multitex.o: $(UTIL_HEADERS)
-
-multitex: multitex.o $(UTIL_OBJS)
-
-
-noise.o: $(UTIL_HEADERS)
-
-noise: noise.o $(UTIL_OBJS)
-
-
-noise2.o: $(UTIL_HEADERS)
-
-noise2: noise2.o $(UTIL_OBJS)
-
-
-points.o: $(UTIL_HEADERS)
-
-points: points.o $(UTIL_OBJS)
-
-
-pointcoord.o: $(UTIL_HEADERS)
-
-pointcoord: pointcoord.o $(UTIL_OBJS)
-
-
-samplers.o: $(UTIL_HEADERS)
-
-samplers: samplers.o $(UTIL_OBJS)
-
-
-samplers_array.o: $(UTIL_HEADERS)
-
-samplers_array: samplers_array.o $(UTIL_OBJS)
-
-
-shadow_sampler.o: $(UTIL_HEADERS)
-
-shadow_sampler: shadow_sampler.o $(UTIL_OBJS)
-
-
-skinning.o: $(UTIL_HEADERS)
-
-skinning: skinning.o $(UTIL_OBJS)
-
-
-texaaline.o: $(UTIL_HEADERS)
-
-texaaline: texaaline.o $(UTIL_OBJS)
-
-
-texdemo1.o: $(UTIL_HEADERS)
-
-texdemo1: texdemo1.o $(UTIL_OBJS)
-
-
-toyball.o: $(UTIL_HEADERS)
-
-toyball: toyball.o $(UTIL_OBJS)
-
-
-twoside.o: $(UTIL_HEADERS)
-
-twoside: twoside.o $(UTIL_OBJS)
-
-
-trirast.o: $(UTIL_HEADERS)
-
-trirast: trirast.o $(UTIL_OBJS)
-
-
-vert-or-frag-only.o: $(UTIL_HEADERS)
-
-vert-or-frag-only: vert-or-frag-only.o $(UTIL_OBJS)
-
-
-vert-tex.o: $(UTIL_HEADERS)
-
-vert-tex: vert-tex.o $(UTIL_OBJS)
diff --git a/progs/glsl/SConscript b/progs/glsl/SConscript
new file mode 100644
index 0000000000..7a4549cd70
--- /dev/null
+++ b/progs/glsl/SConscript
@@ -0,0 +1,55 @@
+Import('*')
+
+if not env['GLUT']:
+    Return()
+
+env = env.Clone()
+
+env.Prepend(CPPPATH = [
+	'../util',
+])
+
+env.Prepend(LIBS = [
+	util,
+	'$GLUT_LIB'
+])
+
+if env['platform'] == 'windows':
+    env.Append(CPPDEFINES = ['NOMINMAX'])
+    env.Prepend(LIBS = ['winmm'])
+
+progs = [
+      'array',
+      'bitmap',
+      'brick',
+      'bump',
+      'convolutions',
+      'deriv',
+      'fragcoord',
+      'identity',
+      'linktest',
+      'mandelbrot',
+      'multinoise',
+      'multitex',
+      'noise',
+      'noise2',
+      'pointcoord',
+      'points',
+      'samplers',
+      'shadow_sampler',
+      'skinning',
+      'texaaline',
+      'texdemo1',
+      'toyball',
+      'trirast',
+      'twoside',
+      'vert-or-frag-only',
+      'vert-tex',
+]
+
+for prog in progs:
+    env.Program(
+        target = prog,
+        source = prog + '.c',
+    )
+    
diff --git a/progs/glsl/array.c b/progs/glsl/array.c
index 46ef8043bc..4ed18485ea 100644
--- a/progs/glsl/array.c
+++ b/progs/glsl/array.c
@@ -9,10 +9,8 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <math.h>
-#include <GL/gl.h>
+#include <GL/glew.h>
 #include <GL/glut.h>
-#include <GL/glext.h>
-#include "extfuncs.h"
 #include "shaderutil.h"
 
 
@@ -144,9 +142,9 @@ Reshape(int width, int height)
 static void
 CleanUp(void)
 {
-   glDeleteShader_func(fragShader);
-   glDeleteShader_func(vertShader);
-   glDeleteProgram_func(program);
+   glDeleteShader(fragShader);
+   glDeleteShader(vertShader);
+   glDeleteProgram(program);
    glutDestroyWindow(win);
 }
 
@@ -219,19 +217,17 @@ Init(void)
    if (!ShadersSupported())
       exit(1);
 
-   GetExtensionFuncs();
-
    vertShader = CompileShaderText(GL_VERTEX_SHADER, VertShaderText);
    fragShader = CompileShaderText(GL_FRAGMENT_SHADER, FragShaderText);
    program = LinkShaders(vertShader, fragShader);
 
-   glUseProgram_func(program);
+   glUseProgram(program);
 
    /* Setup the HeightArray[] uniform */
    for (i = 0; i < 20; i++)
       HeightArray[i] = i / 20.0;
-   u = glGetUniformLocation_func(program, "HeightArray");
-   glUniform1fv_func(u, 20, HeightArray);
+   u = glGetUniformLocation(program, "HeightArray");
+   glUniform1fv(u, 20, HeightArray);
 
    assert(glGetError() == 0);
 
@@ -248,6 +244,7 @@ main(int argc, char *argv[])
    glutInitWindowSize(500, 500);
    glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
    win = glutCreateWindow(argv[0]);
+   glewInit();
    glutReshapeFunc(Reshape);
    glutKeyboardFunc(Key);
    glutSpecialFunc(SpecialKey);
diff --git a/progs/glsl/bitmap.c b/progs/glsl/bitmap.c
index d488ec6cb9..8b1853d9ab 100644
--- a/progs/glsl/bitmap.c
+++ b/progs/glsl/bitmap.c
@@ -9,10 +9,8 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <math.h>
-#include <GL/gl.h>
+#include <GL/glew.h>
 #include <GL/glut.h>
-#include <GL/glext.h>
-#include "extfuncs.h"
 #include "shaderutil.h"
 
 
@@ -78,11 +76,11 @@ Redisplay(void)
       BitmapText("-X");
    }
    else {
-      glUseProgram_func(Program);
+      glUseProgram(Program);
 
       /* vertex positions (deltas) depend on texture size and window size */
       if (uScale != -1) {
-         glUniform2f_func(uScale,
+         glUniform2f(uScale,
                           2.0 * TEX_WIDTH / WinWidth,
                           2.0 * TEX_HEIGHT / WinHeight);
       }
@@ -105,7 +103,7 @@ Redisplay(void)
       glTexCoord2f(0, 1);  glVertex3fv(nx);
       glEnd();
 
-      glUseProgram_func(0);
+      glUseProgram(0);
    }
 
    glPopMatrix();
@@ -160,9 +158,9 @@ Key(unsigned char key, int x, int y)
          printf("Using billboard texture\n");
       break;
    case 27:
-      glDeleteShader_func(FragShader);
-      glDeleteShader_func(VertShader);
-      glDeleteProgram_func(Program);
+      glDeleteShader(FragShader);
+      glDeleteShader(VertShader);
+      glDeleteProgram(Program);
       glutDestroyWindow(Win);
       exit(0);
    }
@@ -277,21 +275,19 @@ Init(void)
    if (!ShadersSupported())
       exit(1);
 
-   GetExtensionFuncs();
-
    VertShader = CompileShaderText(GL_VERTEX_SHADER, vertShaderText);
    FragShader = CompileShaderText(GL_FRAGMENT_SHADER, fragShaderText);
    Program = LinkShaders(VertShader, FragShader);
 
-   glUseProgram_func(Program);
+   glUseProgram(Program);
 
-   uScale = glGetUniformLocation_func(Program, "scale");
-   uTex = glGetUniformLocation_func(Program, "tex2d");
+   uScale = glGetUniformLocation(Program, "scale");
+   uTex = glGetUniformLocation(Program, "tex2d");
    if (uTex != -1) {
-      glUniform1i_func(uTex, 0);  /* tex unit 0 */
+      glUniform1i(uTex, 0);  /* tex unit 0 */
    }
 
-   glUseProgram_func(0);
+   glUseProgram(0);
 
    glClearColor(0.3f, 0.3f, 0.3f, 0.0f);
    glEnable(GL_DEPTH_TEST);
@@ -309,6 +305,7 @@ main(int argc, char *argv[])
    glutInitWindowSize(WinWidth, WinHeight);
    glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
    Win = glutCreateWindow(argv[0]);
+   glewInit();
    glutReshapeFunc(Reshape);
    glutKeyboardFunc(Key);
    glutSpecialFunc(SpecialKey);
diff --git a/progs/glsl/brick.c b/progs/glsl/brick.c
index 526ef0e2e3..20417aa462 100644
--- a/progs/glsl/brick.c
+++ b/progs/glsl/brick.c
@@ -9,10 +9,8 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <math.h>
-#include <GL/gl.h>
+#include <GL/glew.h>
 #include <GL/glut.h>
-#include <GL/glext.h>
-#include "extfuncs.h"
 #include "shaderutil.h"
 
 
@@ -26,12 +24,12 @@ static GLuint program;
 
 static struct uniform_info Uniforms[] = {
    /* vert */
-   { "LightPosition",     3, GL_FLOAT, { 0.1, 0.1, 9.0, 0}, -1 },
+   { "LightPosition",     1, GL_FLOAT_VEC3, { 0.1, 0.1, 9.0, 0}, -1 },
    /* frag */
-   { "BrickColor",        3, GL_FLOAT, { 0.8, 0.2, 0.2, 0 }, -1 },
-   { "MortarColor",       3, GL_FLOAT, { 0.6, 0.6, 0.6, 0 }, -1 },
-   { "BrickSize",         2, GL_FLOAT, { 1.0, 0.3, 0, 0 }, -1 },
-   { "BrickPct",          2, GL_FLOAT, { 0.9, 0.8, 0, 0 }, -1 },
+   { "BrickColor",        1, GL_FLOAT_VEC3, { 0.8, 0.2, 0.2, 0 }, -1 },
+   { "MortarColor",       1, GL_FLOAT_VEC3, { 0.6, 0.6, 0.6, 0 }, -1 },
+   { "BrickSize",         1, GL_FLOAT_VEC2, { 1.0, 0.3, 0, 0 }, -1 },
+   { "BrickPct",          1, GL_FLOAT_VEC2, { 0.9, 0.8, 0, 0 }, -1 },
    END_OF_UNIFORMS
 };
 
@@ -82,9 +80,9 @@ Reshape(int width, int height)
 static void
 CleanUp(void)
 {
-   glDeleteShader_func(fragShader);
-   glDeleteShader_func(vertShader);
-   glDeleteProgram_func(program);
+   glDeleteShader(fragShader);
+   glDeleteShader(vertShader);
+   glDeleteProgram(program);
    glutDestroyWindow(win);
 }
 
@@ -144,15 +142,14 @@ Init(void)
    if (!ShadersSupported())
       exit(1);
 
-   GetExtensionFuncs();
-
    vertShader = CompileShaderFile(GL_VERTEX_SHADER, VertProgFile);
    fragShader = CompileShaderFile(GL_FRAGMENT_SHADER, FragProgFile);
    program = LinkShaders(vertShader, fragShader);
 
-   glUseProgram_func(program);
+   glUseProgram(program);
 
-   InitUniforms(program, Uniforms);
+   SetUniformValues(program, Uniforms);
+   PrintUniforms(Uniforms);
 
    assert(glGetError() == 0);
 
@@ -160,9 +157,9 @@ Init(void)
 
    printf("GL_RENDERER = %s\n",(const char *) glGetString(GL_RENDERER));
 
-   assert(glIsProgram_func(program));
-   assert(glIsShader_func(fragShader));
-   assert(glIsShader_func(vertShader));
+   assert(glIsProgram(program));
+   assert(glIsShader(fragShader));
+   assert(glIsShader(vertShader));
 
    glColor3f(1, 0, 0);
 }
@@ -187,10 +184,10 @@ 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]);
+   glewInit();
    glutReshapeFunc(Reshape);
    glutKeyboardFunc(Key);
    glutSpecialFunc(SpecialKey);
diff --git a/progs/glsl/brick.shtest b/progs/glsl/brick.shtest
new file mode 100644
index 0000000000..8a2152692e
--- /dev/null
+++ b/progs/glsl/brick.shtest
@@ -0,0 +1,8 @@
+vs CH06-brick.vert
+fs CH06-brick.frag
+uniform LightPosition GL_FLOAT_VEC3 0.1 0.1 9.0
+uniform BrickColor GL_FLOAT_VEC3 0.8 0.2 0.2
+uniform MortarColor GL_FLOAT_VEC3 0.6 0.6 0.6
+uniform BrickSize  GL_FLOAT_VEC2 1.0 0.3
+uniform BrickPct GL_FLOAT_VEC2 0.9 0.8
+
diff --git a/progs/glsl/bump.c b/progs/glsl/bump.c
index 0ea1f8331f..87669aec73 100644
--- a/progs/glsl/bump.c
+++ b/progs/glsl/bump.c
@@ -9,10 +9,8 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <math.h>
+#include <GL/glew.h>
 #include <GL/glut.h>
-#include <GL/glu.h>
-#include <GL/glext.h>
-#include "extfuncs.h"
 #include "shaderutil.h"
 
 
@@ -26,11 +24,11 @@ static GLuint program;
 
 
 static struct uniform_info Uniforms[] = {
-   { "LightPosition",    3, GL_FLOAT, { 0.57737, 0.57735, 0.57735, 0.0 }, -1 },
-   { "SurfaceColor",     3, GL_FLOAT, { 0.8, 0.8, 0.2, 0 }, -1 },
-   { "BumpDensity",      1, GL_FLOAT, { 10.0, 0, 0, 0 }, -1 },
-   { "BumpSize",         1, GL_FLOAT, { 0.125, 0, 0, 0 }, -1 },
-   { "SpecularFactor",   1, GL_FLOAT, { 0.5, 0, 0, 0 }, -1 },
+   { "LightPosition",  1, GL_FLOAT_VEC3, { 0.57737, 0.57735, 0.57735, 0.0 }, -1 },
+   { "SurfaceColor",   1, GL_FLOAT_VEC3, { 0.8, 0.8, 0.2, 0 }, -1 },
+   { "BumpDensity",    1, GL_FLOAT, { 10.0, 0, 0, 0 }, -1 },
+   { "BumpSize",       1, GL_FLOAT, { 0.125, 0, 0, 0 }, -1 },
+   { "SpecularFactor", 1, GL_FLOAT, { 0.5, 0, 0, 0 }, -1 },
    END_OF_UNIFORMS
 };
 
@@ -60,7 +58,7 @@ static void
 Square(GLfloat size)
 {
    glNormal3f(0, 0, 1);
-   glVertexAttrib3f_func(tangentAttrib, 1, 0, 0);
+   glVertexAttrib3f(tangentAttrib, 1, 0, 0);
    glBegin(GL_POLYGON);
    glTexCoord2f(0, 0);  glVertex2f(-size, -size);
    glTexCoord2f(1, 0);  glVertex2f( size, -size);
@@ -164,9 +162,9 @@ Reshape(int width, int height)
 static void
 CleanUp(void)
 {
-   glDeleteShader_func(fragShader);
-   glDeleteShader_func(vertShader);
-   glDeleteProgram_func(program);
+   glDeleteShader(fragShader);
+   glDeleteShader(vertShader);
+   glDeleteProgram(program);
    glutDestroyWindow(win);
 }
 
@@ -230,27 +228,26 @@ Init(void)
    if (!ShadersSupported())
       exit(1);
 
-   GetExtensionFuncs();
-
    vertShader = CompileShaderFile(GL_VERTEX_SHADER, VertProgFile);
    fragShader = CompileShaderFile(GL_FRAGMENT_SHADER, FragProgFile);
    program = LinkShaders(vertShader, fragShader);
 
-   glUseProgram_func(program);
+   glUseProgram(program);
 
-   assert(glIsProgram_func(program));
-   assert(glIsShader_func(fragShader));
-   assert(glIsShader_func(vertShader));
+   assert(glIsProgram(program));
+   assert(glIsShader(fragShader));
+   assert(glIsShader(vertShader));
 
    assert(glGetError() == 0);
 
    CheckError(__LINE__);
 
-   InitUniforms(program, Uniforms);
+   SetUniformValues(program, Uniforms);
+   PrintUniforms(Uniforms);
 
    CheckError(__LINE__);
 
-   tangentAttrib = glGetAttribLocation_func(program, "Tangent");
+   tangentAttrib = glGetAttribLocation(program, "Tangent");
    printf("Tangent Attrib: %d\n", tangentAttrib);
 
    assert(tangentAttrib >= 0);
@@ -284,10 +281,10 @@ 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]);
+   glewInit();
    glutReshapeFunc(Reshape);
    glutKeyboardFunc(Key);
    glutSpecialFunc(SpecialKey);
diff --git a/progs/glsl/convolutions.c b/progs/glsl/convolutions.c
index ac71c68235..c2fb76e1aa 100644
--- a/progs/glsl/convolutions.c
+++ b/progs/glsl/convolutions.c
@@ -5,6 +5,8 @@
  * Author: Zack Rusin
  */
 
+#include <GL/glew.h>
+
 #define GL_GLEXT_PROTOTYPES
 #include "readtex.h"
 
@@ -446,7 +448,6 @@ int main(int argc, char **argv)
 {
    glutInit(&argc, argv);
 
-   glutInitWindowPosition(0, 0);
    glutInitWindowSize(400, 400);
    glutInitDisplayMode(GLUT_RGB | GLUT_ALPHA | GLUT_DOUBLE);
 
@@ -455,6 +456,7 @@ int main(int argc, char **argv)
       exit(1);
    }
 
+   glewInit();
    init();
 
    glutReshapeFunc(reshape);
diff --git a/progs/glsl/deriv.c b/progs/glsl/deriv.c
index e69f0b82c4..265a515715 100644
--- a/progs/glsl/deriv.c
+++ b/progs/glsl/deriv.c
@@ -13,10 +13,8 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <math.h>
-#include <GL/gl.h>
+#include <GL/glew.h>
 #include <GL/glut.h>
-#include <GL/glext.h>
-#include "extfuncs.h"
 #include "shaderutil.h"
 
 
@@ -70,9 +68,9 @@ Reshape(int width, int height)
 static void
 CleanUp(void)
 {
-   glDeleteShader_func(fragShader);
-   glDeleteShader_func(vertShader);
-   glDeleteProgram_func(program);
+   glDeleteShader(fragShader);
+   glDeleteShader(vertShader);
+   glDeleteProgram(program);
    glutDestroyWindow(win);
 }
 
@@ -177,13 +175,11 @@ Init(void)
    if (!ShadersSupported())
       exit(1);
 
-   GetExtensionFuncs();
-
    vertShader = CompileShaderText(GL_VERTEX_SHADER, vertShaderText);
    fragShader = CompileShaderText(GL_FRAGMENT_SHADER, fragShaderText);
    program = LinkShaders(vertShader, fragShader);
 
-   glUseProgram_func(program);
+   glUseProgram(program);
 
    /*assert(glGetError() == 0);*/
 
@@ -197,9 +193,9 @@ Init(void)
 
    printf("GL_RENDERER = %s\n",(const char *) glGetString(GL_RENDERER));
 
-   assert(glIsProgram_func(program));
-   assert(glIsShader_func(fragShader));
-   assert(glIsShader_func(vertShader));
+   assert(glIsProgram(program));
+   assert(glIsShader(fragShader));
+   assert(glIsShader(vertShader));
 
    glColor3f(1, 0, 0);
 }
@@ -224,10 +220,10 @@ int
 main(int argc, char *argv[])
 {
    glutInit(&argc, argv);
-   glutInitWindowPosition( 0, 0);
    glutInitWindowSize(200, 200);
    glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
    win = glutCreateWindow(argv[0]);
+   glewInit();
    glutReshapeFunc(Reshape);
    glutKeyboardFunc(Key);
    glutSpecialFunc(SpecialKey);
diff --git a/progs/glsl/fragcoord.c b/progs/glsl/fragcoord.c
index 0b7561f3e4..3dfcec87a5 100644
--- a/progs/glsl/fragcoord.c
+++ b/progs/glsl/fragcoord.c
@@ -12,10 +12,8 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <math.h>
-#include <GL/gl.h>
+#include <GL/glew.h>
 #include <GL/glut.h>
-#include <GL/glext.h>
-#include "extfuncs.h"
 #include "shaderutil.h"
 
 
@@ -85,9 +83,9 @@ Reshape(int width, int height)
 static void
 CleanUp(void)
 {
-   glDeleteShader_func(fragShader);
-   glDeleteShader_func(vertShader);
-   glDeleteProgram_func(program);
+   glDeleteShader(fragShader);
+   glDeleteShader(vertShader);
+   glDeleteProgram(program);
    glutDestroyWindow(win);
 }
 
@@ -129,13 +127,11 @@ Init(void)
    if (!ShadersSupported())
       exit(1);
 
-   GetExtensionFuncs();
-
    vertShader = CompileShaderText(GL_VERTEX_SHADER, vertShaderText);
    fragShader = CompileShaderText(GL_FRAGMENT_SHADER, fragShaderText);
    program = LinkShaders(vertShader, fragShader);
 
-   glUseProgram_func(program);
+   glUseProgram(program);
 
    /*assert(glGetError() == 0);*/
 
@@ -143,9 +139,9 @@ Init(void)
 
    printf("GL_RENDERER = %s\n",(const char *) glGetString(GL_RENDERER));
 
-   assert(glIsProgram_func(program));
-   assert(glIsShader_func(fragShader));
-   assert(glIsShader_func(vertShader));
+   assert(glIsProgram(program));
+   assert(glIsShader(fragShader));
+   assert(glIsShader(vertShader));
 
    glColor3f(1, 0, 0);
 }
@@ -170,10 +166,10 @@ int
 main(int argc, char *argv[])
 {
    glutInit(&argc, argv);
-   glutInitWindowPosition( 0, 0);
    glutInitWindowSize(WinWidth, WinHeight);
    glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE);
    win = glutCreateWindow(argv[0]);
+   glewInit();
    glutReshapeFunc(Reshape);
    glutKeyboardFunc(Key);
    glutDisplayFunc(Redisplay);
diff --git a/progs/glsl/identity.c b/progs/glsl/identity.c
index 37579eb346..526e9b82c1 100644
--- a/progs/glsl/identity.c
+++ b/progs/glsl/identity.c
@@ -9,10 +9,8 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <math.h>
-#include <GL/gl.h>
+#include <GL/glew.h>
 #include <GL/glut.h>
-#include <GL/glext.h>
-#include "extfuncs.h"
 #include "shaderutil.h"
 
 
@@ -69,9 +67,9 @@ Reshape(int width, int height)
 static void
 CleanUp(void)
 {
-   glDeleteShader_func(fragShader);
-   glDeleteShader_func(vertShader);
-   glDeleteProgram_func(program);
+   glDeleteShader(fragShader);
+   glDeleteShader(vertShader);
+   glDeleteProgram(program);
    glutDestroyWindow(win);
 }
 
@@ -141,8 +139,6 @@ Init(void)
    if (!ShadersSupported())
       exit(1);
 
-   GetExtensionFuncs();
-
    if (FragProgFile)
       fragShader = CompileShaderFile(GL_FRAGMENT_SHADER, FragProgFile);
    else
@@ -155,7 +151,7 @@ Init(void)
 
    program = LinkShaders(vertShader, fragShader);
 
-   glUseProgram_func(program);
+   glUseProgram(program);
 
    /*assert(glGetError() == 0);*/
 
@@ -164,9 +160,9 @@ Init(void)
 
    printf("GL_RENDERER = %s\n",(const char *) glGetString(GL_RENDERER));
 
-   assert(glIsProgram_func(program));
-   assert(glIsShader_func(fragShader));
-   assert(glIsShader_func(vertShader));
+   assert(glIsProgram(program));
+   assert(glIsShader(fragShader));
+   assert(glIsShader(vertShader));
 
    glColor3f(1, 0, 0);
 }
@@ -191,10 +187,10 @@ int
 main(int argc, char *argv[])
 {
    glutInit(&argc, argv);
-   glutInitWindowPosition( 0, 0);
    glutInitWindowSize(200, 200);
    glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
    win = glutCreateWindow(argv[0]);
+   glewInit();
    glutReshapeFunc(Reshape);
    glutKeyboardFunc(Key);
    glutSpecialFunc(SpecialKey);
diff --git a/progs/glsl/linktest.c b/progs/glsl/linktest.c
index 988d082341..ec3fffbf9c 100644
--- a/progs/glsl/linktest.c
+++ b/progs/glsl/linktest.c
@@ -9,10 +9,8 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <math.h>
-#include <GL/gl.h>
+#include <GL/glew.h>
 #include <GL/glut.h>
-#include <GL/glext.h>
-#include "extfuncs.h"
 #include "shaderutil.h"
 
 
@@ -132,11 +130,11 @@ Reshape(int width, int height)
 static void
 CleanUp(void)
 {
-   glDeleteShader_func(VertShader1);
-   glDeleteShader_func(VertShader2);
-   glDeleteShader_func(FragShader1);
-   glDeleteShader_func(FragShader2);
-   glDeleteProgram_func(Program);
+   glDeleteShader(VertShader1);
+   glDeleteShader(VertShader2);
+   glDeleteShader(FragShader1);
+   glDeleteShader(FragShader2);
+   glDeleteProgram(Program);
    glutDestroyWindow(Win);
 }
 
@@ -175,11 +173,11 @@ static void
 CheckLink(GLuint prog)
 {
    GLint stat;
-   glGetProgramiv_func(prog, GL_LINK_STATUS, &stat);
+   glGetProgramiv(prog, GL_LINK_STATUS, &stat);
    if (!stat) {
       GLchar log[1000];
       GLsizei len;
-      glGetProgramInfoLog_func(prog, 1000, &len, log);
+      glGetProgramInfoLog(prog, 1000, &len, log);
       fprintf(stderr, "Linker error:\n%s\n", log);
    }
 }
@@ -191,8 +189,6 @@ Init(void)
    if (!ShadersSupported())
       exit(1);
 
-   GetExtensionFuncs();
-
    printf("GL_RENDERER = %s\n",(const char *) glGetString(GL_RENDERER));
 
    VertShader1 = CompileShaderText(GL_VERTEX_SHADER, VertShaderSource1);
@@ -200,26 +196,26 @@ Init(void)
    FragShader1 = CompileShaderText(GL_FRAGMENT_SHADER, FragShaderSource1);
    FragShader2 = CompileShaderText(GL_FRAGMENT_SHADER, FragShaderSource2);
 
-   Program = glCreateProgram_func();
-   glAttachShader_func(Program, VertShader1);
-   glAttachShader_func(Program, VertShader2);
-   glAttachShader_func(Program, FragShader1);
-   glAttachShader_func(Program, FragShader2);
+   Program = glCreateProgram();
+   glAttachShader(Program, VertShader1);
+   glAttachShader(Program, VertShader2);
+   glAttachShader(Program, FragShader1);
+   glAttachShader(Program, FragShader2);
 
-   glLinkProgram_func(Program);
+   glLinkProgram(Program);
 
    CheckLink(Program);
 
-   glUseProgram_func(Program);
+   glUseProgram(Program);
 
-   uDiffuse = glGetUniformLocation_func(Program, "diffuse");
-   uSpecular = glGetUniformLocation_func(Program, "specular");
-   uTexture = glGetUniformLocation_func(Program, "texture");
+   uDiffuse = glGetUniformLocation(Program, "diffuse");
+   uSpecular = glGetUniformLocation(Program, "specular");
+   uTexture = glGetUniformLocation(Program, "texture");
    printf("DiffusePos %d  SpecularPos %d  TexturePos %d\n",
           uDiffuse, uSpecular, uTexture);
 
-   glUniform4fv_func(uDiffuse, 1, diffuse);
-   glUniform4fv_func(uSpecular, 1, specular);
+   glUniform4fv(uDiffuse, 1, diffuse);
+   glUniform4fv(uSpecular, 1, specular);
 
    glClearColor(0.3f, 0.3f, 0.3f, 0.0f);
    glEnable(GL_DEPTH_TEST);
@@ -228,11 +224,11 @@ Init(void)
    glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, specular);
    glMaterialf(GL_FRONT_AND_BACK, GL_SHININESS, 10.0f);
 
-   assert(glIsProgram_func(Program));
-   assert(glIsShader_func(VertShader1));
-   assert(glIsShader_func(VertShader2));
-   assert(glIsShader_func(FragShader1));
-   assert(glIsShader_func(FragShader2));
+   assert(glIsProgram(Program));
+   assert(glIsShader(VertShader1));
+   assert(glIsShader(VertShader2));
+   assert(glIsShader(FragShader1));
+   assert(glIsShader(FragShader2));
 
    glColor3f(1, 0, 0);
 }
@@ -245,6 +241,7 @@ main(int argc, char *argv[])
    glutInitWindowSize(300, 300);
    glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
    Win = glutCreateWindow(argv[0]);
+   glewInit();
    glutReshapeFunc(Reshape);
    glutKeyboardFunc(Key);
    glutDisplayFunc(Redisplay);
diff --git a/progs/glsl/mandelbrot.c b/progs/glsl/mandelbrot.c
index 24e1992665..b05ef37fae 100644
--- a/progs/glsl/mandelbrot.c
+++ b/progs/glsl/mandelbrot.c
@@ -9,10 +9,8 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <math.h>
-#include <GL/gl.h>
+#include <GL/glew.h>
 #include <GL/glut.h>
-#include <GL/glext.h>
-#include "extfuncs.h"
 #include "shaderutil.h"
 
 
@@ -27,7 +25,7 @@ static GLuint program;
 
 static struct uniform_info Uniforms[] = {
    /* vert */
-   { "LightPosition",        3, GL_FLOAT, { 0.1, 0.1, 9.0, 0}, -1 },
+   { "LightPosition",        1, GL_FLOAT_VEC3, { 0.1, 0.1, 9.0, 0}, -1 },
    { "SpecularContribution", 1, GL_FLOAT, { 0.5, 0, 0, 0 }, -1 },
    { "DiffuseContribution",  1, GL_FLOAT, { 0.5, 0, 0, 0 }, -1 },
    { "Shininess",            1, GL_FLOAT, { 20.0, 0, 0, 0 }, -1 },
@@ -36,9 +34,9 @@ static struct uniform_info Uniforms[] = {
    { "Zoom",                 1, GL_FLOAT, { 0.125, 0, 0, 0 }, -1 },
    { "Xcenter",              1, GL_FLOAT, { -1.5, 0, 0, 0 }, -1 },
    { "Ycenter",              1, GL_FLOAT, { .005, 0, 0, 0 }, -1 },
-   { "InnerColor",           3, GL_FLOAT, { 1, 0, 0, 0 }, -1 },
-   { "OuterColor1",          3, GL_FLOAT, { 0, 1, 0, 0 }, -1 },
-   { "OuterColor2",          3, GL_FLOAT, { 0, 0, 1, 0 }, -1 },
+   { "InnerColor",           1, GL_FLOAT_VEC3, { 1, 0, 0, 0 }, -1 },
+   { "OuterColor1",          1, GL_FLOAT_VEC3, { 0, 1, 0, 0 }, -1 },
+   { "OuterColor2",          1, GL_FLOAT_VEC3, { 0, 0, 1, 0 }, -1 },
    END_OF_UNIFORMS
 };
 
@@ -56,9 +54,9 @@ Redisplay(void)
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
    
    /* set interactive uniform parameters */
-   glUniform1fv_func(uZoom, 1, &zoom);
-   glUniform1fv_func(uXcenter, 1, &xCenter);
-   glUniform1fv_func(uYcenter, 1, &yCenter);
+   glUniform1fv(uZoom, 1, &zoom);
+   glUniform1fv(uXcenter, 1, &xCenter);
+   glUniform1fv(uYcenter, 1, &yCenter);
 
    glPushMatrix();
    glRotatef(xRot, 1.0f, 0.0f, 0.0f);
@@ -94,9 +92,9 @@ Reshape(int width, int height)
 static void
 CleanUp(void)
 {
-   glDeleteShader_func(fragShader);
-   glDeleteShader_func(vertShader);
-   glDeleteProgram_func(program);
+   glDeleteShader(fragShader);
+   glDeleteShader(vertShader);
+   glDeleteProgram(program);
    glutDestroyWindow(win);
 }
 
@@ -155,19 +153,18 @@ Init(void)
    if (!ShadersSupported())
       exit(1);
 
-   GetExtensionFuncs();
-
    vertShader = CompileShaderFile(GL_VERTEX_SHADER, VertProgFile);
    fragShader = CompileShaderFile(GL_FRAGMENT_SHADER, FragProgFile);
    program = LinkShaders(vertShader, fragShader);
 
-   glUseProgram_func(program);
+   glUseProgram(program);
 
-   InitUniforms(program, Uniforms);
+   SetUniformValues(program, Uniforms);
+   PrintUniforms(Uniforms);
 
-   uZoom = glGetUniformLocation_func(program, "Zoom");
-   uXcenter = glGetUniformLocation_func(program, "Xcenter");
-   uYcenter = glGetUniformLocation_func(program, "Ycenter");
+   uZoom = glGetUniformLocation(program, "Zoom");
+   uXcenter = glGetUniformLocation(program, "Xcenter");
+   uYcenter = glGetUniformLocation(program, "Ycenter");
 
    assert(glGetError() == 0);
 
@@ -175,9 +172,9 @@ Init(void)
 
    printf("GL_RENDERER = %s\n",(const char *) glGetString(GL_RENDERER));
 
-   assert(glIsProgram_func(program));
-   assert(glIsShader_func(fragShader));
-   assert(glIsShader_func(vertShader));
+   assert(glIsProgram(program));
+   assert(glIsShader(fragShader));
+   assert(glIsShader(vertShader));
 
    glColor3f(1, 0, 0);
 }
@@ -202,10 +199,10 @@ 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]);
+   glewInit();
    glutReshapeFunc(Reshape);
    glutKeyboardFunc(Key);
    glutSpecialFunc(SpecialKey);
diff --git a/progs/glsl/mandelbrot.shtest b/progs/glsl/mandelbrot.shtest
new file mode 100644
index 0000000000..4f4e5c747e
--- /dev/null
+++ b/progs/glsl/mandelbrot.shtest
@@ -0,0 +1,13 @@
+vs CH18-mandel.vert
+fs CH18-mandel.frag
+uniform LightPosition        GL_FLOAT_VEC3 0.1 0.1 9.0
+uniform SpecularContribution GL_FLOAT 0.5
+uniform DiffuseContribution  GL_FLOAT 0.5
+uniform Shininess            GL_FLOAT 20.0
+uniform Iterations           GL_FLOAT 12
+uniform Zoom                 GL_FLOAT 0.125
+uniform Xcenter              GL_FLOAT -1.5
+uniform Ycenter              GL_FLOAT .005
+uniform InnerColor           GL_FLOAT_VEC3 1 0 0
+uniform OuterColor1          GL_FLOAT_VEC3 0 1 0
+uniform OuterColor2          GL_FLOAT_VEC3 0 0 1
diff --git a/progs/glsl/multinoise.c b/progs/glsl/multinoise.c
index 2351863aff..0d4026e29c 100644
--- a/progs/glsl/multinoise.c
+++ b/progs/glsl/multinoise.c
@@ -8,10 +8,8 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <math.h>
-#include <GL/gl.h>
+#include <GL/glew.h>
 #include <GL/glut.h>
-#include <GL/glext.h>
-#include "extfuncs.h"
 
 static const char *VertShaderText =
    "void main() {\n"
@@ -107,10 +105,10 @@ CleanUp(void)
 {
    GLint i;
 
-   glDeleteShader_func(vertShader);
+   glDeleteShader(vertShader);
    for( i = 0; i < 4; i++ ) {
-      glDeleteShader_func(fragShader[ i ]);
-      glDeleteProgram_func(program[ i ]);
+      glDeleteShader(fragShader[ i ]);
+      glDeleteProgram(program[ i ]);
    }
    glutDestroyWindow(win);
 }
@@ -143,7 +141,7 @@ Key(unsigned char key, int x, int y)
    case '2':
    case '3':
    case '4':
-      glUseProgram_func(program[ key - '1' ]);
+      glUseProgram(program[ key - '1' ]);
       break;
    case 27:
       CleanUp();
@@ -186,15 +184,15 @@ LoadAndCompileShader(GLuint shader, const char *text)
 {
    GLint stat;
 
-   glShaderSource_func(shader, 1, (const GLchar **) &text, NULL);
+   glShaderSource(shader, 1, (const GLchar **) &text, NULL);
 
-   glCompileShader_func(shader);
+   glCompileShader(shader);
 
-   glGetShaderiv_func(shader, GL_COMPILE_STATUS, &stat);
+   glGetShaderiv(shader, GL_COMPILE_STATUS, &stat);
    if (!stat) {
       GLchar log[1000];
       GLsizei len;
-      glGetShaderInfoLog_func(shader, 1000, &len, log);
+      glGetShaderInfoLog(shader, 1000, &len, log);
       fprintf(stderr, "noise: problem compiling shader: %s\n", log);
       exit(1);
    }
@@ -208,11 +206,11 @@ static void
 CheckLink(GLuint prog)
 {
    GLint stat;
-   glGetProgramiv_func(prog, GL_LINK_STATUS, &stat);
+   glGetProgramiv(prog, GL_LINK_STATUS, &stat);
    if (!stat) {
       GLchar log[1000];
       GLsizei len;
-      glGetProgramInfoLog_func(prog, 1000, &len, log);
+      glGetProgramInfoLog(prog, 1000, &len, log);
       fprintf(stderr, "Linker error:\n%s\n", log);
    }
    else {
@@ -233,22 +231,20 @@ Init(void)
       /*exit(1);*/
    }
 
-   GetExtensionFuncs();
-
-   vertShader = glCreateShader_func(GL_VERTEX_SHADER);
+   vertShader = glCreateShader(GL_VERTEX_SHADER);
    LoadAndCompileShader(vertShader, VertShaderText);
 
    for( i = 0; i < 4; i++ ) {
-      fragShader[ i ] = glCreateShader_func(GL_FRAGMENT_SHADER);
+      fragShader[ i ] = glCreateShader(GL_FRAGMENT_SHADER);
       LoadAndCompileShader(fragShader[ i ], FragShaderText[ i ]);
-      program[ i ] = glCreateProgram_func();
-      glAttachShader_func(program[ i ], fragShader[ i ]);
-      glAttachShader_func(program[ i ], vertShader);
-      glLinkProgram_func(program[ i ]);
+      program[ i ] = glCreateProgram();
+      glAttachShader(program[ i ], fragShader[ i ]);
+      glAttachShader(program[ i ], vertShader);
+      glLinkProgram(program[ i ]);
       CheckLink(program[ i ]);
    }
    
-   glUseProgram_func(program[ 0 ]);
+   glUseProgram(program[ 0 ]);
 
    assert(glGetError() == 0);
 
@@ -266,10 +262,10 @@ 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]);
+   glewInit();
    glutReshapeFunc(Reshape);
    glutKeyboardFunc(Key);
    glutSpecialFunc(SpecialKey);
diff --git a/progs/glsl/multitex.c b/progs/glsl/multitex.c
index 1a1c63aaf4..bf46fd5210 100644
--- a/progs/glsl/multitex.c
+++ b/progs/glsl/multitex.c
@@ -28,9 +28,9 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <GL/glew.h>
 #include "GL/glut.h"
 #include "readtex.h"
-#include "extfuncs.h"
 #include "shaderutil.h"
 
 static const char *Demo = "multitex";
@@ -59,8 +59,8 @@ static GLint VertCoord_attr = -1, TexCoord0_attr = -1, TexCoord1_attr = -1;
 
 /* value[0] = tex unit */
 static struct uniform_info Uniforms[] = {
-   { "tex1",  1, GL_INT, { 0, 0, 0, 0 }, -1 },
-   { "tex2",  1, GL_INT, { 1, 0, 0, 0 }, -1 },
+   { "tex1",  1, GL_SAMPLER_2D, { 0, 0, 0, 0 }, -1 },
+   { "tex2",  1, GL_SAMPLER_2D, { 1, 0, 0, 0 }, -1 },
    END_OF_UNIFORMS
 };
 
@@ -82,10 +82,10 @@ static const GLfloat VertCoords[4][2] = {
 static void
 SetupVertexBuffer(void)
 {
-   glGenBuffersARB_func(1, &VBO);
-   glBindBufferARB_func(GL_ARRAY_BUFFER_ARB, VBO);
+   glGenBuffersARB(1, &VBO);
+   glBindBufferARB(GL_ARRAY_BUFFER_ARB, VBO);
 
-   glBufferDataARB_func(GL_ARRAY_BUFFER_ARB,
+   glBufferDataARB(GL_ARRAY_BUFFER_ARB,
                         sizeof(VertCoords) +
                         sizeof(Tex0Coords) +
                         sizeof(Tex1Coords),
@@ -94,23 +94,23 @@ SetupVertexBuffer(void)
 
    /* non-interleaved vertex arrays */
 
-   glBufferSubDataARB_func(GL_ARRAY_BUFFER_ARB,
+   glBufferSubDataARB(GL_ARRAY_BUFFER_ARB,
                            0,                   /* offset */
                            sizeof(VertCoords),  /* size */
                            VertCoords);         /* data */
 
-   glBufferSubDataARB_func(GL_ARRAY_BUFFER_ARB,
+   glBufferSubDataARB(GL_ARRAY_BUFFER_ARB,
                            sizeof(VertCoords),  /* offset */
                            sizeof(Tex0Coords),  /* size */
                            Tex0Coords);         /* data */
 
-   glBufferSubDataARB_func(GL_ARRAY_BUFFER_ARB,
+   glBufferSubDataARB(GL_ARRAY_BUFFER_ARB,
                            sizeof(VertCoords) +
                            sizeof(Tex0Coords),  /* offset */
                            sizeof(Tex1Coords),  /* size */
                            Tex1Coords);         /* data */
 
-   glBindBufferARB_func(GL_ARRAY_BUFFER_ARB, 0);
+   glBindBufferARB(GL_ARRAY_BUFFER_ARB, 0);
 }
 
 
@@ -120,39 +120,39 @@ DrawPolygonArray(void)
    void *vertPtr, *tex0Ptr, *tex1Ptr;
 
    if (UseVBO) {
-      glBindBufferARB_func(GL_ARRAY_BUFFER_ARB, VBO);
+      glBindBufferARB(GL_ARRAY_BUFFER_ARB, VBO);
       vertPtr = (void *) 0;
       tex0Ptr = (void *) sizeof(VertCoords);
       tex1Ptr = (void *) (sizeof(VertCoords) + sizeof(Tex0Coords));
    }
    else {
-      glBindBufferARB_func(GL_ARRAY_BUFFER_ARB, 0);
+      glBindBufferARB(GL_ARRAY_BUFFER_ARB, 0);
       vertPtr = VertCoords;
       tex0Ptr = Tex0Coords;
       tex1Ptr = Tex1Coords;
    }
 
    if (VertCoord_attr >= 0) {
-      glVertexAttribPointer_func(VertCoord_attr, 2, GL_FLOAT, GL_FALSE,
+      glVertexAttribPointer(VertCoord_attr, 2, GL_FLOAT, GL_FALSE,
                                  0, vertPtr);
-      glEnableVertexAttribArray_func(VertCoord_attr);
+      glEnableVertexAttribArray(VertCoord_attr);
    }
    else {
       glVertexPointer(2, GL_FLOAT, 0, vertPtr);
-      glEnable(GL_VERTEX_ARRAY);
+      glEnableClientState(GL_VERTEX_ARRAY);
    }
 
-   glVertexAttribPointer_func(TexCoord0_attr, 2, GL_FLOAT, GL_FALSE,
+   glVertexAttribPointer(TexCoord0_attr, 2, GL_FLOAT, GL_FALSE,
                               0, tex0Ptr);
-   glEnableVertexAttribArray_func(TexCoord0_attr);
+   glEnableVertexAttribArray(TexCoord0_attr);
 
-   glVertexAttribPointer_func(TexCoord1_attr, 2, GL_FLOAT, GL_FALSE,
+   glVertexAttribPointer(TexCoord1_attr, 2, GL_FLOAT, GL_FALSE,
                               0, tex1Ptr);
-   glEnableVertexAttribArray_func(TexCoord1_attr);
+   glEnableVertexAttribArray(TexCoord1_attr);
 
    glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
 
-      glBindBufferARB_func(GL_ARRAY_BUFFER_ARB, 0);
+   glBindBufferARB(GL_ARRAY_BUFFER_ARB, 0);
 }
 
 
@@ -164,11 +164,11 @@ DrawPolygonVert(void)
    glBegin(GL_TRIANGLE_FAN);
 
    for (i = 0; i < 4; i++) {
-      glVertexAttrib2fv_func(TexCoord0_attr, Tex0Coords[i]);
-      glVertexAttrib2fv_func(TexCoord1_attr, Tex1Coords[i]);
+      glVertexAttrib2fv(TexCoord0_attr, Tex0Coords[i]);
+      glVertexAttrib2fv(TexCoord1_attr, Tex1Coords[i]);
 
       if (VertCoord_attr >= 0)
-         glVertexAttrib2fv_func(VertCoord_attr, VertCoords[i]);
+         glVertexAttrib2fv(VertCoord_attr, VertCoords[i]);
       else
          glVertex2fv(VertCoords[i]);
    }
@@ -326,27 +326,30 @@ CreateProgram(const char *vertProgFile, const char *fragProgFile,
    assert(vertShader);
    program = LinkShaders(vertShader, fragShader);
 
-   glUseProgram_func(program);
+   glUseProgram(program);
 
-   InitUniforms(program, uniforms);
+   SetUniformValues(program, uniforms);
+   PrintUniforms(Uniforms);
 
-   VertCoord_attr = glGetAttribLocation_func(program, "VertCoord");
+   assert(ValidateShaderProgram(program));
+
+   VertCoord_attr = glGetAttribLocation(program, "VertCoord");
    if (VertCoord_attr > 0) {
       /* We want the VertCoord attrib to have position zero so that
        * the call to glVertexAttrib(0, xyz) triggers vertex processing.
        * Otherwise, if TexCoord0 or TexCoord1 gets position 0 we'd have
        * to set that attribute last (which is a PITA to manage).
        */
-      glBindAttribLocation_func(program, 0, "VertCoord");
+      glBindAttribLocation(program, 0, "VertCoord");
       /* re-link */
-      glLinkProgram_func(program);
+      glLinkProgram(program);
       /* VertCoord_attr should be zero now */
-      VertCoord_attr = glGetAttribLocation_func(program, "VertCoord");
+      VertCoord_attr = glGetAttribLocation(program, "VertCoord");
       assert(VertCoord_attr == 0);
    }
 
-   TexCoord0_attr = glGetAttribLocation_func(program, "TexCoord0");
-   TexCoord1_attr = glGetAttribLocation_func(program, "TexCoord1");
+   TexCoord0_attr = glGetAttribLocation(program, "TexCoord0");
+   TexCoord1_attr = glGetAttribLocation(program, "TexCoord1");
 
    printf("TexCoord0_attr = %d\n", TexCoord0_attr);
    printf("TexCoord1_attr = %d\n", TexCoord1_attr);
@@ -379,7 +382,6 @@ InitGL(void)
    printf("  z/Z   - change viewing distance\n");
    printf("  SPACE - toggle animation\n");
    printf("  Esc   - exit\n");
-   GetExtensionFuncs();
 
    InitTextures();
    InitPrograms();
@@ -400,6 +402,7 @@ main(int argc, char *argv[])
    glutInitWindowSize(500, 400);
    glutInitDisplayMode(GLUT_RGB | GLUT_DEPTH | GLUT_DOUBLE);
    glutCreateWindow(Demo);
+   glewInit();
    glutReshapeFunc(Reshape);
    glutKeyboardFunc(key);
    glutSpecialFunc(specialkey);
diff --git a/progs/glsl/multitex.shtest b/progs/glsl/multitex.shtest
new file mode 100644
index 0000000000..4b7c3fd4a5
--- /dev/null
+++ b/progs/glsl/multitex.shtest
@@ -0,0 +1,6 @@
+vs multitex.vert
+fs multitex.frag
+texture 0 2D ../images/tile.rgb
+texture 1 2D ../images/tree2.rgba
+uniform tex1  GL_SAMPLER_2D  0
+uniform tex2  GL_SAMPLER_2D  1
diff --git a/progs/glsl/noise.c b/progs/glsl/noise.c
index bd8f50036b..fdab263ea6 100644
--- a/progs/glsl/noise.c
+++ b/progs/glsl/noise.c
@@ -8,10 +8,8 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <math.h>
-#include <GL/gl.h>
+#include <GL/glew.h>
 #include <GL/glut.h>
-#include <GL/glext.h>
-#include "extfuncs.h"
 #include "shaderutil.h"
 
 
@@ -37,8 +35,8 @@ static const char *FragShaderText =
 
 
 static struct uniform_info Uniforms[] = {
-   { "Scale",    4, GL_FLOAT, { 0.5, 0.4, 0.0, 0}, -1 },
-   { "Bias",     4, GL_FLOAT, { 0.5, 0.3, 0.0, 0}, -1 },
+   { "Scale",    1, GL_FLOAT_VEC4, { 0.5, 0.4, 0.0, 0}, -1 },
+   { "Bias",     1, GL_FLOAT_VEC4, { 0.5, 0.3, 0.0, 0}, -1 },
    { "Slice",    1, GL_FLOAT, { 0.5, 0, 0, 0}, -1 },
    END_OF_UNIFORMS
 };
@@ -67,7 +65,7 @@ Redisplay(void)
 {
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
    
-   glUniform1fv_func(Uniforms[2].location, 1, &Slice);
+   glUniform1fv(Uniforms[2].location, 1, &Slice);
 
    glPushMatrix();
    glRotatef(xRot, 1.0f, 0.0f, 0.0f);
@@ -103,9 +101,9 @@ Reshape(int width, int height)
 static void
 CleanUp(void)
 {
-   glDeleteShader_func(fragShader);
-   glDeleteShader_func(vertShader);
-   glDeleteProgram_func(program);
+   glDeleteShader(fragShader);
+   glDeleteShader(vertShader);
+   glDeleteProgram(program);
    glutDestroyWindow(win);
 }
 
@@ -175,15 +173,14 @@ Init(void)
    if (!ShadersSupported())
       exit(1);
 
-   GetExtensionFuncs();
-
    vertShader = CompileShaderText(GL_VERTEX_SHADER, VertShaderText);
    fragShader = CompileShaderText(GL_FRAGMENT_SHADER, FragShaderText);
    program = LinkShaders(vertShader, fragShader);
 
-   glUseProgram_func(program);
+   glUseProgram(program);
 
-   InitUniforms(program, Uniforms);
+   SetUniformValues(program, Uniforms);
+   PrintUniforms(Uniforms);
 
    assert(glGetError() == 0);
 
@@ -191,9 +188,9 @@ Init(void)
 
    printf("GL_RENDERER = %s\n",(const char *) glGetString(GL_RENDERER));
 
-   assert(glIsProgram_func(program));
-   assert(glIsShader_func(fragShader));
-   assert(glIsShader_func(vertShader));
+   assert(glIsProgram(program));
+   assert(glIsShader(fragShader));
+   assert(glIsShader(vertShader));
 
    glColor3f(1, 0, 0);
 }
@@ -203,10 +200,10 @@ 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]);
+   glewInit();
    glutReshapeFunc(Reshape);
    glutKeyboardFunc(Key);
    glutSpecialFunc(SpecialKey);
diff --git a/progs/glsl/noise2.c b/progs/glsl/noise2.c
index e972b62673..7a28f09947 100644
--- a/progs/glsl/noise2.c
+++ b/progs/glsl/noise2.c
@@ -186,7 +186,6 @@ static void Init (void)
 int main (int argc, char *argv[])
 {
 	glutInit (&argc, argv);
-	glutInitWindowPosition ( 0, 0);
 	glutInitWindowSize (200, 200);
 	glutInitDisplayMode (GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
 	glutCreateWindow (argv[0]);
diff --git a/progs/glsl/pointcoord.c b/progs/glsl/pointcoord.c
index b240077c25..5dced6fac3 100644
--- a/progs/glsl/pointcoord.c
+++ b/progs/glsl/pointcoord.c
@@ -10,10 +10,8 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <math.h>
-#include <GL/gl.h>
+#include <GL/glew.h>
 #include <GL/glut.h>
-#include <GL/glext.h>
-#include "extfuncs.h"
 #include "shaderutil.h"
 
 
@@ -64,9 +62,9 @@ Reshape(int width, int height)
 static void
 CleanUp(void)
 {
-   glDeleteShader_func(fragShader);
-   glDeleteShader_func(vertShader);
-   glDeleteProgram_func(program);
+   glDeleteShader(fragShader);
+   glDeleteShader(vertShader);
+   glDeleteProgram(program);
    glutDestroyWindow(win);
 }
 
@@ -141,18 +139,16 @@ Init(void)
    if (!ShadersSupported())
       exit(1);
 
-   GetExtensionFuncs();
-
    vertShader = CompileShaderText(GL_VERTEX_SHADER, vertShaderText);
    fragShader = CompileShaderText(GL_FRAGMENT_SHADER, fragShaderText);
    program = LinkShaders(vertShader, fragShader);
 
-   glUseProgram_func(program);
+   glUseProgram(program);
 
-   tex0 = glGetUniformLocation_func(program, "tex0");
+   tex0 = glGetUniformLocation(program, "tex0");
    printf("Uniforms: tex0: %d\n", tex0);
 
-   glUniform1i_func(tex0, 0); /* tex unit 0 */
+   glUniform1i(tex0, 0); /* tex unit 0 */
 
    /*assert(glGetError() == 0);*/
 
@@ -160,9 +156,9 @@ Init(void)
 
    printf("GL_RENDERER = %s\n",(const char *) glGetString(GL_RENDERER));
 
-   assert(glIsProgram_func(program));
-   assert(glIsShader_func(fragShader));
-   assert(glIsShader_func(vertShader));
+   assert(glIsProgram(program));
+   assert(glIsShader(fragShader));
+   assert(glIsShader(vertShader));
 
    MakeTexture();
 
@@ -191,10 +187,10 @@ int
 main(int argc, char *argv[])
 {
    glutInit(&argc, argv);
-   glutInitWindowPosition( 0, 0);
    glutInitWindowSize(WinWidth, WinHeight);
    glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE);
    win = glutCreateWindow(argv[0]);
+   glewInit();
    glutReshapeFunc(Reshape);
    glutKeyboardFunc(Key);
    glutDisplayFunc(Redisplay);
diff --git a/progs/glsl/points.c b/progs/glsl/points.c
index 392dc4db85..e5ee38c449 100644
--- a/progs/glsl/points.c
+++ b/progs/glsl/points.c
@@ -10,10 +10,8 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <math.h>
-#include <GL/gl.h>
+#include <GL/glew.h>
 #include <GL/glut.h>
-#include <GL/glext.h>
-#include "extfuncs.h"
 #include "shaderutil.h"
 
 
@@ -99,7 +97,7 @@ Redisplay(void)
     */
    glPushMatrix();
    glTranslatef(0, 1.2, 0);
-   glUseProgram_func(0);
+   glUseProgram(0);
    DrawPoints(GL_FALSE);
    glPopMatrix();
 
@@ -108,9 +106,9 @@ Redisplay(void)
     */
    glPushMatrix();
    glTranslatef(0, -1.2, 0);
-   glUseProgram_func(Program);
+   glUseProgram(Program);
    if (uViewportInv != -1) {
-      glUniform2f_func(uViewportInv, 1.0 / WinWidth, 1.0 / WinHeight);
+      glUniform2f(uViewportInv, 1.0 / WinWidth, 1.0 / WinHeight);
    }
    DrawPoints(GL_TRUE);
    glPopMatrix();
@@ -150,9 +148,9 @@ Key(unsigned char key, int x, int y)
       Smooth = !Smooth;
       break;
    case 27:
-      glDeleteShader_func(FragShader);
-      glDeleteShader_func(VertShader);
-      glDeleteProgram_func(Program);
+      glDeleteShader(FragShader);
+      glDeleteShader(VertShader);
+      glDeleteProgram(Program);
       glutDestroyWindow(Win);
       exit(0);
    }
@@ -225,17 +223,15 @@ Init(void)
    if (!ShadersSupported())
       exit(1);
 
-   GetExtensionFuncs();
-
    VertShader = CompileShaderText(GL_VERTEX_SHADER, vertShaderText);
    FragShader = CompileShaderText(GL_FRAGMENT_SHADER, fragShaderText);
    Program = LinkShaders(VertShader, FragShader);
 
-   glUseProgram_func(Program);
+   glUseProgram(Program);
 
-   uViewportInv = glGetUniformLocation_func(Program, "viewportInv");
+   uViewportInv = glGetUniformLocation(Program, "viewportInv");
 
-   glUseProgram_func(0);
+   glUseProgram(0);
 
    glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 }
@@ -248,6 +244,7 @@ main(int argc, char *argv[])
    glutInitWindowSize(WinWidth, WinHeight);
    glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
    Win = glutCreateWindow(argv[0]);
+   glewInit();
    glutReshapeFunc(Reshape);
    glutKeyboardFunc(Key);
    glutSpecialFunc(SpecialKey);
diff --git a/progs/glsl/reflect.vert b/progs/glsl/reflect.vert
index 402be38bf7..e1f22def33 100644
--- a/progs/glsl/reflect.vert
+++ b/progs/glsl/reflect.vert
@@ -11,6 +11,7 @@ void main()
    float two_n_dot_u = 2.0 * dot(n, u);
    vec4 f;
    f.xyz = u - n * two_n_dot_u;
+   f.w = 1.0;
 
    // outputs
    normal = n;
diff --git a/progs/glsl/samplers.c b/progs/glsl/samplers.c
index 3fb8577d5e..87dad5d857 100644
--- a/progs/glsl/samplers.c
+++ b/progs/glsl/samplers.c
@@ -39,9 +39,9 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <GL/glew.h>
 #include "GL/glut.h"
 #include "readtex.h"
-#include "extfuncs.h"
 #include "shaderutil.h"
 
 
@@ -211,10 +211,18 @@ InitTextures(void)
       for (y = 0; y < stripeSize; y++) {
          for (x = 0; x < size; x++) {
             GLint k = 4 * ((ypos + y) * size + x);
-            texImage[k + 0] = intensity;
-            texImage[k + 1] = intensity;
-            texImage[k + 2] = 0;
-            texImage[k + 3] = 255;
+            if (x < size / 2) {
+               texImage[k + 0] = intensity;
+               texImage[k + 1] = intensity;
+               texImage[k + 2] = 0;
+               texImage[k + 3] = 255;
+            }
+            else {
+               texImage[k + 0] = 255 - intensity;
+               texImage[k + 1] = 0;
+               texImage[k + 2] = 0;
+               texImage[k + 3] = 255;
+            }
          }
       }
 
@@ -290,7 +298,7 @@ CreateProgram(void)
    assert(vertShader);
    program = LinkShaders(vertShader, fragShader);
 
-   glUseProgram_func(program);
+   glUseProgram(program);
 
    free(fragShaderText);
 
@@ -315,10 +323,10 @@ InitProgram(void)
 #else
       sprintf(uname, "tex[%d]", s);
 #endif
-      loc = glGetUniformLocation_func(Program, uname);
+      loc = glGetUniformLocation(Program, uname);
       assert(loc >= 0);
 
-      glUniform1i_func(loc, s);
+      glUniform1i(loc, s);
    }
 }
 
@@ -333,8 +341,6 @@ InitGL(void)
 
    printf("GL_RENDERER = %s\n", (const char *) glGetString(GL_RENDERER));
 
-   GetExtensionFuncs();
-
    glGetIntegerv(GL_MAX_TEXTURE_IMAGE_UNITS, &NumSamplers);
    if (NumSamplers > MAX_SAMPLERS)
       NumSamplers = MAX_SAMPLERS;
@@ -357,6 +363,7 @@ main(int argc, char *argv[])
    glutInitWindowSize(500, 400);
    glutInitDisplayMode(GLUT_RGB | GLUT_DEPTH | GLUT_DOUBLE);
    glutCreateWindow(Demo);
+   glewInit();
    glutReshapeFunc(Reshape);
    glutKeyboardFunc(key);
    glutSpecialFunc(specialkey);
diff --git a/progs/glsl/shadow_sampler.c b/progs/glsl/shadow_sampler.c
index 2902b53552..0adc9d88ba 100644
--- a/progs/glsl/shadow_sampler.c
+++ b/progs/glsl/shadow_sampler.c
@@ -10,10 +10,8 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <math.h>
-#include <GL/gl.h>
+#include <GL/glew.h>
 #include <GL/glut.h>
-#include <GL/glext.h>
-#include "extfuncs.h"
 
 
 /** Use GL_RECTANGLE texture (with projective texcoords)? */
@@ -66,7 +64,7 @@ Redisplay(void)
    glPushMatrix();
 
    CheckError(__LINE__);
-   glUseProgram_func(program);
+   glUseProgram(program);
    CheckError(__LINE__);
 
    glBegin(GL_POLYGON);
@@ -86,7 +84,7 @@ Redisplay(void)
 
    glPopMatrix();
 
-   glUseProgram_func(0);
+   glUseProgram(0);
    glWindowPos2iARB(80, 20);
    PrintString("white   black   white   black");
 
@@ -110,9 +108,9 @@ Reshape(int width, int height)
 static void
 CleanUp(void)
 {
-   glDeleteShader_func(fragShader);
-   glDeleteShader_func(vertShader);
-   glDeleteProgram_func(program);
+   glDeleteShader(fragShader);
+   glDeleteShader(vertShader);
+   glDeleteProgram(program);
    glutDestroyWindow(win);
 }
 
@@ -178,13 +176,13 @@ static void
 LoadAndCompileShader(GLuint shader, const char *text)
 {
    GLint stat;
-   glShaderSource_func(shader, 1, (const GLchar **) &text, NULL);
-   glCompileShader_func(shader);
-   glGetShaderiv_func(shader, GL_COMPILE_STATUS, &stat);
+   glShaderSource(shader, 1, (const GLchar **) &text, NULL);
+   glCompileShader(shader);
+   glGetShaderiv(shader, GL_COMPILE_STATUS, &stat);
    if (!stat) {
       GLchar log[1000];
       GLsizei len;
-      glGetShaderInfoLog_func(shader, 1000, &len, log);
+      glGetShaderInfoLog(shader, 1000, &len, log);
       fprintf(stderr, "fslight: problem compiling shader:\n%s\n", log);
       exit(1);
    }
@@ -222,11 +220,11 @@ static void
 CheckLink(GLuint prog)
 {
    GLint stat;
-   glGetProgramiv_func(prog, GL_LINK_STATUS, &stat);
+   glGetProgramiv(prog, GL_LINK_STATUS, &stat);
    if (!stat) {
       GLchar log[1000];
       GLsizei len;
-      glGetProgramInfoLog_func(prog, 1000, &len, log);
+      glGetProgramInfoLog(prog, 1000, &len, log);
       fprintf(stderr, "Linker error:\n%s\n", log);
    }
 }
@@ -266,35 +264,33 @@ Init(void)
    }
    printf("GL_RENDERER = %s\n",(const char *) glGetString(GL_RENDERER));
 
-   GetExtensionFuncs();
-
-   fragShader = glCreateShader_func(GL_FRAGMENT_SHADER);
+   fragShader = glCreateShader(GL_FRAGMENT_SHADER);
    if (FragProgFile)
       ReadShader(fragShader, FragProgFile);
    else
       LoadAndCompileShader(fragShader, fragShaderText);
 
-   vertShader = glCreateShader_func(GL_VERTEX_SHADER);
+   vertShader = glCreateShader(GL_VERTEX_SHADER);
    if (VertProgFile)
       ReadShader(vertShader, VertProgFile);
    else
       LoadAndCompileShader(vertShader, vertShaderText);
 
-   program = glCreateProgram_func();
-   glAttachShader_func(program, fragShader);
-   glAttachShader_func(program, vertShader);
-   glLinkProgram_func(program);
+   program = glCreateProgram();
+   glAttachShader(program, fragShader);
+   glAttachShader(program, vertShader);
+   glLinkProgram(program);
    CheckLink(program);
-   glUseProgram_func(program);
+   glUseProgram(program);
 
-   uTexture2D = glGetUniformLocation_func(program, "shadowTex2D");
-   uTextureRect = glGetUniformLocation_func(program, "shadowTexRect");
+   uTexture2D = glGetUniformLocation(program, "shadowTex2D");
+   uTextureRect = glGetUniformLocation(program, "shadowTexRect");
    printf("uTexture2D %d  uTextureRect %d\n", uTexture2D, uTextureRect);
    if (uTexture2D >= 0) {
-      glUniform1i_func(uTexture2D, 0);  /* use texture unit 0 */
+      glUniform1i(uTexture2D, 0);  /* use texture unit 0 */
    }
    if (uTextureRect >= 0) {
-      glUniform1i_func(uTextureRect, 1);  /* use texture unit 0 */
+      glUniform1i(uTextureRect, 1);  /* use texture unit 0 */
    }
    CheckError(__LINE__);
 
@@ -325,10 +321,10 @@ int
 main(int argc, char *argv[])
 {
    glutInit(&argc, argv);
-   glutInitWindowPosition( 0, 0);
    glutInitWindowSize(400, 300);
    glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE);
    win = glutCreateWindow(argv[0]);
+   glewInit();
    glutReshapeFunc(Reshape);
    glutKeyboardFunc(Key);
    glutDisplayFunc(Redisplay);
diff --git a/progs/glsl/shtest.c b/progs/glsl/shtest.c
new file mode 100644
index 0000000000..628a7dd5b9
--- /dev/null
+++ b/progs/glsl/shtest.c
@@ -0,0 +1,709 @@
+/*
+ * Simple shader test harness.
+ * Brian Paul
+ * 13 Aug 2009
+ *
+ * Usage:
+ *   shtest --vs vertShaderFile --fs fragShaderFile
+ *
+ *   In this case the given vertex/frag shaders are read and compiled.
+ *   Random values are assigned to the uniforms.
+ *
+ * or:
+ *   shtest configFile
+ *
+ *   In this case a config file is read that specifies the file names
+ *   of the shaders plus initial values for uniforms.
+ *
+ * Example config file:
+ *
+ * vs shader.vert
+ * fs shader.frag
+ * uniform pi 3.14159
+ * uniform v1 1.0 0.5 0.2 0.3
+ * texture 0 2D texture0.rgb
+ * texture 1 CUBE texture1.rgb
+ * texture 2 RECT texture2.rgb
+ *
+ */
+
+
+#include <assert.h>
+#include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <math.h>
+#include <GL/glew.h>
+#include <GL/glu.h>
+#include <GL/glut.h>
+#include "shaderutil.h"
+#include "readtex.h"
+
+
+typedef enum
+{
+   SPHERE,
+   CUBE,
+   NUM_SHAPES
+} shape;
+
+
+static char *FragShaderFile = NULL;
+static char *VertShaderFile = NULL;
+static char *ConfigFile = NULL;
+
+/* program/shader objects */
+static GLuint fragShader;
+static GLuint vertShader;
+static GLuint Program;
+
+
+#define MAX_UNIFORMS 100
+static struct uniform_info Uniforms[MAX_UNIFORMS];
+static GLuint NumUniforms = 0;
+
+
+#define MAX_ATTRIBS 100
+static struct attrib_info Attribs[MAX_ATTRIBS];
+static GLuint NumAttribs = 0;
+
+
+/**
+ * Config file info.
+ */
+struct config_file
+{
+   struct name_value
+   {
+      char name[100];
+      float value[4];
+      int type;
+   } uniforms[100];
+
+   int num_uniforms;
+};
+
+
+static GLint win = 0;
+static GLboolean Anim = GL_FALSE;
+static GLfloat TexRot = 0.0;
+static GLfloat xRot = 0.0f, yRot = 0.0f, zRot = 0.0f;
+static shape Object = SPHERE;
+
+
+static float
+RandomFloat(float min, float max)
+{
+   int k = rand() % 10000;
+   float x = min + (max - min) * k / 10000.0;
+   return x;
+}
+
+
+/** Set new random values for uniforms */
+static void
+RandomUniformValues(void)
+{
+   GLuint i;
+   for (i = 0; i < NumUniforms; i++) {
+      switch (Uniforms[i].type) {
+      case GL_FLOAT:
+         Uniforms[i].value[0] = RandomFloat(0.0, 1.0);
+         break;
+      case GL_SAMPLER_1D:
+      case GL_SAMPLER_2D:
+      case GL_SAMPLER_3D:
+      case GL_SAMPLER_CUBE:
+      case GL_SAMPLER_2D_RECT_ARB:
+         /* don't change sampler values - random values are bad */
+         break;
+      default:
+         Uniforms[i].value[0] = RandomFloat(-1.0, 2.0);
+         Uniforms[i].value[1] = RandomFloat(-1.0, 2.0);
+         Uniforms[i].value[2] = RandomFloat(-1.0, 2.0);
+         Uniforms[i].value[3] = RandomFloat(-1.0, 2.0);
+      }
+   }
+}
+
+
+static void
+Idle(void)
+{
+   yRot += 2.0;
+   if (yRot > 360.0)
+      yRot -= 360.0;
+   glutPostRedisplay();
+}
+
+
+
+static void
+SquareVertex(GLfloat s, GLfloat t, GLfloat size)
+{
+   GLfloat x = -size + s * 2.0 * size;
+   GLfloat y = -size + t * 2.0 * size;
+   GLuint i;
+
+   glMultiTexCoord2f(GL_TEXTURE0, s, t);
+   glMultiTexCoord2f(GL_TEXTURE1, s, t);
+   glMultiTexCoord2f(GL_TEXTURE2, s, t);
+   glMultiTexCoord2f(GL_TEXTURE3, s, t);
+
+   /* assign (s,t) to the generic attributes */
+   for (i = 0; i < NumAttribs; i++) {
+      if (Attribs[i].location >= 0) {
+         glVertexAttrib2f(Attribs[i].location, s, t);
+      }
+   }
+
+   glVertex2f(x, y);
+}
+
+
+/*
+ * Draw a square, specifying normal and tangent vectors.
+ */
+static void
+Square(GLfloat size)
+{
+   GLint tangentAttrib = 1;
+   glNormal3f(0, 0, 1);
+   glVertexAttrib3f(tangentAttrib, 1, 0, 0);
+   glBegin(GL_POLYGON);
+#if 1
+   SquareVertex(0, 0, size);
+   SquareVertex(1, 0, size);
+   SquareVertex(1, 1, size);
+   SquareVertex(0, 1, size);
+#else
+   glTexCoord2f(0, 0);  glVertex2f(-size, -size);
+   glTexCoord2f(1, 0);  glVertex2f( size, -size);
+   glTexCoord2f(1, 1);  glVertex2f( size,  size);
+   glTexCoord2f(0, 1);  glVertex2f(-size,  size);
+#endif
+   glEnd();
+}
+
+
+static void
+Cube(GLfloat size)
+{
+   /* +X */
+   glPushMatrix();
+   glRotatef(90, 0, 1, 0);
+   glTranslatef(0, 0, size);
+   Square(size);
+   glPopMatrix();
+
+   /* -X */
+   glPushMatrix();
+   glRotatef(-90, 0, 1, 0);
+   glTranslatef(0, 0, size);
+   Square(size);
+   glPopMatrix();
+
+   /* +Y */
+   glPushMatrix();
+   glRotatef(90, 1, 0, 0);
+   glTranslatef(0, 0, size);
+   Square(size);
+   glPopMatrix();
+
+   /* -Y */
+   glPushMatrix();
+   glRotatef(-90, 1, 0, 0);
+   glTranslatef(0, 0, size);
+   Square(size);
+   glPopMatrix();
+
+
+   /* +Z */
+   glPushMatrix();
+   glTranslatef(0, 0, size);
+   Square(size);
+   glPopMatrix();
+
+   /* -Z */
+   glPushMatrix();
+   glRotatef(180, 0, 1, 0);
+   glTranslatef(0, 0, size);
+   Square(size);
+   glPopMatrix();
+}
+
+
+static void
+Sphere(GLfloat radius, GLint slices, GLint stacks)
+{
+   static GLUquadricObj *q = NULL;
+
+   if (!q) {
+      q = gluNewQuadric();
+      gluQuadricDrawStyle(q, GLU_FILL);
+      gluQuadricNormals(q, GLU_SMOOTH);
+      gluQuadricTexture(q, GL_TRUE);
+   }
+
+   gluSphere(q, radius, slices, stacks);
+}
+
+
+static void
+Redisplay(void)
+{
+   glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+   
+   glPushMatrix();
+   glRotatef(xRot, 1.0f, 0.0f, 0.0f);
+   glRotatef(yRot, 0.0f, 1.0f, 0.0f);
+   glRotatef(zRot, 0.0f, 0.0f, 1.0f);
+
+   glMatrixMode(GL_TEXTURE);
+   glLoadIdentity();
+   glRotatef(TexRot, 0.0f, 1.0f, 0.0f);
+   glMatrixMode(GL_MODELVIEW);
+
+   if (Object == SPHERE) {
+      Sphere(2.5, 20, 10);
+   }
+   else if (Object == CUBE) {
+      Cube(2.0);
+   }
+
+   glPopMatrix();
+
+   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, 25.0);
+   glMatrixMode(GL_MODELVIEW);
+   glLoadIdentity();
+   glTranslatef(0.0f, 0.0f, -15.0f);
+}
+
+
+static void
+CleanUp(void)
+{
+   glDeleteShader(fragShader);
+   glDeleteShader(vertShader);
+   glDeleteProgram(Program);
+   glutDestroyWindow(win);
+}
+
+
+static void
+Key(unsigned char key, int x, int y)
+{
+   const GLfloat step = 2.0;
+  (void) x;
+  (void) y;
+
+   switch(key) {
+   case 'a':
+      Anim = !Anim;
+      if (Anim)
+         glutIdleFunc(Idle);
+      else
+         glutIdleFunc(NULL);
+      break;
+   case 'z':
+      zRot += step;
+      break;
+   case 'Z':
+      zRot -= step;
+      break;
+   case 'o':
+      Object = (Object + 1) % NUM_SHAPES;
+      break;
+   case 'r':
+      RandomUniformValues();
+      SetUniformValues(Program, Uniforms);
+      PrintUniforms(Uniforms);
+      break;
+   case 27:
+      CleanUp();
+      exit(0);
+      break;
+   }
+   glutPostRedisplay();
+}
+
+
+static void
+SpecialKey(int key, int x, int y)
+{
+   const GLfloat step = 2.0;
+
+  (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
+InitUniforms(const struct config_file *conf,
+             struct uniform_info uniforms[])
+{
+   int i;
+
+   for (i = 0; i < conf->num_uniforms; i++) {
+      int j;
+      for (j = 0; uniforms[j].name; j++) {
+         if (strcmp(uniforms[j].name, conf->uniforms[i].name) == 0) {
+            uniforms[j].type = conf->uniforms[i].type;
+            uniforms[j].value[0] = conf->uniforms[i].value[0];
+            uniforms[j].value[1] = conf->uniforms[i].value[1];
+            uniforms[j].value[2] = conf->uniforms[i].value[2];
+            uniforms[j].value[3] = conf->uniforms[i].value[3];
+         }
+      }
+   }
+}
+
+
+static void
+LoadTexture(GLint unit, GLenum target, const char *texFileName)
+{
+   GLint imgWidth, imgHeight;
+   GLenum imgFormat;
+   GLubyte *image = NULL;
+   GLuint tex;
+   GLenum filter = GL_LINEAR;
+   GLenum objTarget;
+
+   image = LoadRGBImage(texFileName, &imgWidth, &imgHeight, &imgFormat);
+   if (!image) {
+      printf("Couldn't read %s\n", texFileName);
+      exit(1);
+   }
+
+   printf("Load Texture: unit %d, target 0x%x: %s %d x %d\n",
+          unit, target, texFileName, imgWidth, imgHeight);
+
+   if (target >= GL_TEXTURE_CUBE_MAP_POSITIVE_X &&
+       target <= GL_TEXTURE_CUBE_MAP_NEGATIVE_Z) {
+      objTarget = GL_TEXTURE_CUBE_MAP;
+   }
+   else {
+      objTarget = target;
+   }
+
+   glActiveTexture(GL_TEXTURE0 + unit);
+   glGenTextures(1, &tex);
+   glBindTexture(objTarget, tex);
+
+   if (target == GL_TEXTURE_3D) {
+      /* depth=1 */
+      gluBuild3DMipmaps(target, 4, imgWidth, imgHeight, 1,
+                        imgFormat, GL_UNSIGNED_BYTE, image);
+   }
+   else if (target == GL_TEXTURE_1D) {
+      gluBuild1DMipmaps(target, 4, imgWidth,
+                        imgFormat, GL_UNSIGNED_BYTE, image);
+   }
+   else {
+      gluBuild2DMipmaps(target, 4, imgWidth, imgHeight,
+                        imgFormat, GL_UNSIGNED_BYTE, image);
+   }
+
+   free(image);
+      
+   glTexParameteri(objTarget, GL_TEXTURE_WRAP_S, GL_REPEAT);
+   glTexParameteri(objTarget, GL_TEXTURE_WRAP_T, GL_REPEAT);
+   glTexParameteri(objTarget, GL_TEXTURE_MIN_FILTER, filter);
+   glTexParameteri(objTarget, GL_TEXTURE_MAG_FILTER, filter);
+}
+
+
+static GLenum
+TypeFromName(const char *n)
+{
+   static const struct {
+      const char *name;
+      GLenum type;
+   } types[] = {
+      { "GL_FLOAT", GL_FLOAT },
+      { "GL_FLOAT_VEC2", GL_FLOAT_VEC2 },
+      { "GL_FLOAT_VEC3", GL_FLOAT_VEC3 },
+      { "GL_FLOAT_VEC4", GL_FLOAT_VEC4 },
+      { "GL_INT", GL_INT },
+      { "GL_INT_VEC2", GL_INT_VEC2 },
+      { "GL_INT_VEC3", GL_INT_VEC3 },
+      { "GL_INT_VEC4", GL_INT_VEC4 },
+      { "GL_SAMPLER_1D", GL_SAMPLER_1D },
+      { "GL_SAMPLER_2D", GL_SAMPLER_2D },
+      { "GL_SAMPLER_3D", GL_SAMPLER_3D },
+      { "GL_SAMPLER_CUBE", GL_SAMPLER_CUBE },
+      { "GL_SAMPLER_2D_RECT", GL_SAMPLER_2D_RECT_ARB },
+      { NULL, 0 }
+   };
+   GLuint i;
+
+   for (i = 0; types[i].name; i++) {
+      if (strcmp(types[i].name, n) == 0)
+         return types[i].type;
+   }
+   abort();
+   return GL_NONE;
+}
+
+
+
+/**
+ * Read a config file.
+ */
+static void
+ReadConfigFile(const char *filename, struct config_file *conf)
+{
+   char line[1000];
+   FILE *f;
+
+   f = fopen(filename, "r");
+   if (!f) {
+      fprintf(stderr, "Unable to open config file %s\n", filename);
+      exit(1);
+   }
+
+   conf->num_uniforms = 0;
+
+   /* ugly but functional parser */
+   while (!feof(f)) {
+      fgets(line, sizeof(line), f);
+      if (!feof(f) && line[0]) {
+         if (strncmp(line, "vs ", 3) == 0) {
+            VertShaderFile = strdup(line + 3);
+            VertShaderFile[strlen(VertShaderFile) - 1] = 0;
+         }
+         else if (strncmp(line, "fs ", 3) == 0) {
+            FragShaderFile = strdup(line + 3);
+            FragShaderFile[strlen(FragShaderFile) - 1] = 0;
+         }
+         else if (strncmp(line, "texture ", 8) == 0) {
+            char target[100], texFileName[100];
+            int unit, k;
+            k = sscanf(line + 8, "%d %s %s", &unit, target, texFileName);
+            assert(k == 3 || k == 8);
+            if (strcmp(target, "CUBE") == 0) {
+               char texFileNames[6][100];
+               k = sscanf(line + 8, "%d %s  %s %s %s %s %s %s",
+                          &unit, target,
+                          texFileNames[0],
+                          texFileNames[1],
+                          texFileNames[2],
+                          texFileNames[3],
+                          texFileNames[4],
+                          texFileNames[5]);
+               LoadTexture(unit, GL_TEXTURE_CUBE_MAP_POSITIVE_X, texFileNames[0]);
+               LoadTexture(unit, GL_TEXTURE_CUBE_MAP_NEGATIVE_X, texFileNames[1]);
+               LoadTexture(unit, GL_TEXTURE_CUBE_MAP_POSITIVE_Y, texFileNames[2]);
+               LoadTexture(unit, GL_TEXTURE_CUBE_MAP_NEGATIVE_Y, texFileNames[3]);
+               LoadTexture(unit, GL_TEXTURE_CUBE_MAP_POSITIVE_Z, texFileNames[4]);
+               LoadTexture(unit, GL_TEXTURE_CUBE_MAP_NEGATIVE_Z, texFileNames[5]);
+            }
+            else if (!strcmp(target, "2D")) {
+               LoadTexture(unit, GL_TEXTURE_2D, texFileName);
+            }
+            else if (!strcmp(target, "3D")) {
+               LoadTexture(unit, GL_TEXTURE_3D, texFileName);
+            }
+            else if (!strcmp(target, "RECT")) {
+               LoadTexture(unit, GL_TEXTURE_RECTANGLE_ARB, texFileName);
+            }
+            else {
+               printf("Bad texture target: %s\n", target);
+               exit(1);
+            }
+         }
+         else if (strncmp(line, "uniform ", 8) == 0) {
+            char name[1000], typeName[100];
+            int k;
+            float v1 = 0.0F, v2 = 0.0F, v3 = 0.0F, v4 = 0.0F;
+            GLenum type;
+
+            k = sscanf(line + 8, "%s %s %f %f %f %f", name, typeName,
+                       &v1, &v2, &v3, &v4);
+
+            type = TypeFromName(typeName);
+
+            strcpy(conf->uniforms[conf->num_uniforms].name, name);
+            conf->uniforms[conf->num_uniforms].value[0] = v1;
+            conf->uniforms[conf->num_uniforms].value[1] = v2;
+            conf->uniforms[conf->num_uniforms].value[2] = v3;
+            conf->uniforms[conf->num_uniforms].value[3] = v4;
+            conf->uniforms[conf->num_uniforms].type = type;
+            conf->num_uniforms++;
+         }
+         else {
+            if (strlen(line) > 1) {
+               fprintf(stderr, "syntax error in: %s\n", line);
+               break;
+            }
+         }
+      }
+   }
+
+   fclose(f);
+}
+
+
+static void
+Init(void)
+{
+   GLdouble vertTime, fragTime, linkTime;
+   struct config_file config;
+
+   memset(&config, 0, sizeof(config));
+
+   if (ConfigFile)
+      ReadConfigFile(ConfigFile, &config);
+
+   if (!VertShaderFile) {
+      fprintf(stderr, "Error: no vertex shader\n");
+      exit(1);
+   }
+
+   if (!FragShaderFile) {
+      fprintf(stderr, "Error: no fragment shader\n");
+      exit(1);
+   }
+
+   if (!ShadersSupported())
+      exit(1);
+
+   vertShader = CompileShaderFile(GL_VERTEX_SHADER, VertShaderFile);
+   vertTime = GetShaderCompileTime();
+   fragShader = CompileShaderFile(GL_FRAGMENT_SHADER, FragShaderFile);
+   fragTime = GetShaderCompileTime();
+
+   Program = LinkShaders(vertShader, fragShader);
+   linkTime = GetShaderLinkTime();
+
+   printf("Read vert shader %s\n", VertShaderFile);
+   printf("Read frag shader %s\n", FragShaderFile);
+
+   printf("Time to compile vertex shader: %fs\n", vertTime);
+   printf("Time to compile fragment shader: %fs\n", fragTime);
+   printf("Time to link shaders: %fs\n", linkTime);
+
+   assert(ValidateShaderProgram(Program));
+
+   glUseProgram(Program);
+
+   NumUniforms = GetUniforms(Program, Uniforms);
+   if (config.num_uniforms) {
+      InitUniforms(&config, Uniforms);
+   }
+   else {
+      RandomUniformValues();
+   }
+   SetUniformValues(Program, Uniforms);
+   PrintUniforms(Uniforms);
+
+   NumAttribs = GetAttribs(Program, Attribs);
+   PrintAttribs(Attribs);
+
+   //assert(glGetError() == 0);
+
+   glClearColor(0.4f, 0.4f, 0.8f, 0.0f);
+
+   glEnable(GL_DEPTH_TEST);
+
+   glColor3f(1, 0, 0);
+}
+
+
+static void
+Keys(void)
+{
+   printf("Keyboard:\n");
+   printf("       a  Animation toggle\n");
+   printf("       r  Randomize uniform values\n");
+   printf("       o  Change object\n");
+   printf("  arrows  Rotate object\n");
+   printf("     ESC  Exit\n");
+}
+
+
+static void
+Usage(void)
+{
+   printf("Usage:\n");
+   printf("   shtest config.shtest\n");
+   printf("       Run w/ given config file.\n");
+   printf("   shtest --vs vertShader --fs fragShader\n");
+   printf("       Load/compile given shaders.\n");
+}
+
+
+static void
+ParseOptions(int argc, char *argv[])
+{
+   int i;
+
+   if (argc == 1) {
+      Usage();
+      exit(1);
+   }
+
+   for (i = 1; i < argc; i++) {
+      if (strcmp(argv[i], "--fs") == 0) {
+         FragShaderFile = argv[i+1];
+         i++;
+      }
+      else if (strcmp(argv[i], "--vs") == 0) {
+         VertShaderFile = argv[i+1];
+         i++;
+      }
+      else {
+         /* assume the arg is a config file */
+         ConfigFile = argv[i];
+         break;
+      }
+   }
+}
+
+
+int
+main(int argc, char *argv[])
+{
+   glutInitWindowSize(400, 400);
+   glutInit(&argc, argv);
+   glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
+   win = glutCreateWindow(argv[0]);
+   glewInit();
+   glutReshapeFunc(Reshape);
+   glutKeyboardFunc(Key);
+   glutSpecialFunc(SpecialKey);
+   glutDisplayFunc(Redisplay);
+   ParseOptions(argc, argv);
+   Init();
+   Keys();
+   glutMainLoop();
+   return 0;
+}
+
diff --git a/progs/glsl/skinning.c b/progs/glsl/skinning.c
index 8a65d0667c..65ba98348b 100644
--- a/progs/glsl/skinning.c
+++ b/progs/glsl/skinning.c
@@ -12,10 +12,8 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <math.h>
-#include <GL/gl.h>
+#include <GL/glew.h>
 #include <GL/glut.h>
-#include <GL/glext.h>
-#include "extfuncs.h"
 #include "shaderutil.h"
 
 
@@ -64,11 +62,11 @@ Cylinder(GLfloat length, GLfloat radius, GLint slices, GLint stacks)
          float a = (float) i / (slices - 1) * M_PI * 2.0;
          float x = radius * cos(a);
          float y = radius * sin(a);
-         glVertexAttrib1f_func(WeightAttr, w0);
+         glVertexAttrib1f(WeightAttr, w0);
          glNormal3f(x, y, 0.0);
          glVertex3f(x, y, z0);
 
-         glVertexAttrib1f_func(WeightAttr, w0 + dw);
+         glVertexAttrib1f(WeightAttr, w0 + dw);
          glNormal3f(x, y, 0.0);
          glVertex3f(x, y, z0 + dz);
       }
@@ -106,8 +104,8 @@ Redisplay(void)
 {
    UpdateMatrices();
 
-   glUniformMatrix4fv_func(uMat0, 1, GL_FALSE, Matrices[0]);
-   glUniformMatrix4fv_func(uMat1, 1, GL_FALSE, Matrices[1]);
+   glUniformMatrix4fv(uMat0, 1, GL_FALSE, Matrices[0]);
+   glUniformMatrix4fv(uMat1, 1, GL_FALSE, Matrices[1]);
 
    if (WireFrame)
       glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
@@ -148,9 +146,9 @@ Reshape(int width, int height)
 static void
 CleanUp(void)
 {
-   glDeleteShader_func(fragShader);
-   glDeleteShader_func(vertShader);
-   glDeleteProgram_func(program);
+   glDeleteShader(fragShader);
+   glDeleteShader(vertShader);
+   glDeleteProgram(program);
    glutDestroyWindow(win);
 }
 
@@ -221,18 +219,16 @@ Init(void)
    if (!ShadersSupported())
       exit(1);
 
-   GetExtensionFuncs();
-
    vertShader = CompileShaderFile(GL_VERTEX_SHADER, VertProgFile);
    fragShader = CompileShaderFile(GL_FRAGMENT_SHADER, FragProgFile);
    program = LinkShaders(vertShader, fragShader);
 
-   glUseProgram_func(program);
+   glUseProgram(program);
 
-   uMat0 = glGetUniformLocation_func(program, "mat0");
-   uMat1 = glGetUniformLocation_func(program, "mat1");
+   uMat0 = glGetUniformLocation(program, "mat0");
+   uMat1 = glGetUniformLocation(program, "mat1");
 
-   WeightAttr = glGetAttribLocation_func(program, "weight");
+   WeightAttr = glGetAttribLocation(program, "weight");
 
    assert(glGetError() == 0);
 
@@ -266,6 +262,7 @@ main(int argc, char *argv[])
    glutInitWindowSize(500, 500);
    glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
    win = glutCreateWindow(argv[0]);
+   glewInit();
    glutReshapeFunc(Reshape);
    glutKeyboardFunc(Key);
    glutSpecialFunc(SpecialKey);
diff --git a/progs/glsl/texaaline.c b/progs/glsl/texaaline.c
index 0b3cc84958..7a5ac405bb 100644
--- a/progs/glsl/texaaline.c
+++ b/progs/glsl/texaaline.c
@@ -11,10 +11,8 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <math.h>
-#include <GL/gl.h>
+#include <GL/glew.h>
 #include <GL/glut.h>
-#include <GL/glext.h>
-#include "extfuncs.h"
 
 
 static GLint WinWidth = 300, WinHeight = 300;
@@ -105,6 +103,8 @@ static float Sin(float a)
 static void
 Redisplay(void)
 {
+   float cx = 0.5 * WinWidth, cy = 0.5 * WinHeight;
+   float len = 0.5 * WinWidth - 20.0;
    int i;
 
    glClear(GL_COLOR_BUFFER_BIT);
@@ -116,20 +116,20 @@ Redisplay(void)
 
    for (i = 0; i < 360; i+=5) {
       float v0[2], v1[2];
-      v0[0] = 150 + 40 * Cos(i);
-      v0[1] = 150 + 40 * Sin(i);
-      v1[0] = 150 + 130 * Cos(i);
-      v1[1] = 150 + 130 * Sin(i);
+      v0[0] = cx + 40 * Cos(i);
+      v0[1] = cy + 40 * Sin(i);
+      v1[0] = cx + len * Cos(i);
+      v1[1] = cy + len * Sin(i);
       QuadLine(v0, v1, Width);
    }
 
    {
       float v0[2], v1[2], x;
       for (x = 0; x < 1.0; x += 0.2) {
-         v0[0] = 150 + x;
-         v0[1] = 150 + x * 40 - 20;
-         v1[0] = 150 + x + 5.0;
-         v1[1] = 150 + x * 40 - 20;
+         v0[0] = cx + x;
+         v0[1] = cy + x * 40 - 20;
+         v1[0] = cx + x + 5.0;
+         v1[1] = cy + x * 40 - 20;
          QuadLine(v0, v1, Width);
       }
    }
@@ -144,6 +144,8 @@ Redisplay(void)
 static void
 Reshape(int width, int height)
 {
+   WinWidth = width;
+   WinHeight = height;
    glViewport(0, 0, width, height);
    glMatrixMode(GL_PROJECTION);
    glLoadIdentity();
@@ -328,8 +330,6 @@ Init(void)
       exit(1);
    }
 
-   GetExtensionFuncs();
-
    glClearColor(0.3f, 0.3f, 0.3f, 0.0f);
 
    printf("GL_RENDERER = %s\n",(const char *) glGetString(GL_RENDERER));
@@ -355,10 +355,10 @@ int
 main(int argc, char *argv[])
 {
    glutInit(&argc, argv);
-   glutInitWindowPosition( 0, 0);
    glutInitWindowSize(WinWidth, WinHeight);
    glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE);
    win = glutCreateWindow(argv[0]);
+   glewInit();
    glutReshapeFunc(Reshape);
    glutKeyboardFunc(Key);
    glutDisplayFunc(Redisplay);
diff --git a/progs/glsl/texdemo1.c b/progs/glsl/texdemo1.c
index 96ddca1f32..5b1913a722 100644
--- a/progs/glsl/texdemo1.c
+++ b/progs/glsl/texdemo1.c
@@ -28,9 +28,9 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <GL/glew.h>
 #include "GL/glut.h"
 #include "readtex.h"
-#include "extfuncs.h"
 #include "shaderutil.h"
 
 static const char *Demo = "texdemo1";
@@ -53,14 +53,14 @@ static int win = 0;
 
 
 static struct uniform_info ReflectUniforms[] = {
-   { "cubeTex",  1, GL_INT, { 0, 0, 0, 0 }, -1 },
-   { "lightPos", 3, GL_FLOAT, { 10, 10, 20, 0 }, -1 },
+   { "cubeTex",  1, GL_SAMPLER_CUBE, { 0, 0, 0, 0 }, -1 },
+   { "lightPos", 1, GL_FLOAT_VEC3, { 10, 10, 20, 0 }, -1 },
    END_OF_UNIFORMS
 };
 
 static struct uniform_info SimpleUniforms[] = {
-   { "tex2d",    1, GL_INT,   { 1, 0, 0, 0 }, -1 },
-   { "lightPos", 3, GL_FLOAT, { 10, 10, 20, 0 }, -1 },
+   { "tex2d",    1, GL_SAMPLER_2D, { 1, 0, 0, 0 }, -1 },
+   { "lightPos", 1, GL_FLOAT_VEC3, { 10, 10, 20, 0 }, -1 },
    END_OF_UNIFORMS
 };
 
@@ -97,7 +97,7 @@ draw(void)
       /* sphere w/ reflection map */
       glPushMatrix();
          glTranslatef(0, 1, 0);
-         glUseProgram_func(Program1);
+         glUseProgram(Program1);
 
          /* setup texture matrix */
          glActiveTexture(GL_TEXTURE0);
@@ -116,7 +116,7 @@ draw(void)
       glPopMatrix();
 
       /* ground */
-      glUseProgram_func(Program2);
+      glUseProgram(Program2);
       glTranslatef(0, -1.0, 0);
       DrawGround(5);
 
@@ -380,9 +380,10 @@ CreateProgram(const char *vertProgFile, const char *fragProgFile,
    fragShader = CompileShaderFile(GL_FRAGMENT_SHADER, fragProgFile);
    program = LinkShaders(vertShader, fragShader);
 
-   glUseProgram_func(program);
+   glUseProgram(program);
 
-   InitUniforms(program, uniforms);
+   SetUniformValues(program, uniforms);
+   PrintUniforms(uniforms);
 
    return program;
 }
@@ -407,8 +408,6 @@ Init(GLboolean useImageFiles)
    }
    printf("GL_RENDERER = %s\n",(const char *) glGetString(GL_RENDERER));
 
-   GetExtensionFuncs();
-
    InitTextures(useImageFiles);
    InitPrograms();
 
@@ -426,6 +425,7 @@ main(int argc, char *argv[])
    glutInitWindowSize(500, 400);
    glutInitDisplayMode(GLUT_RGB | GLUT_DEPTH | GLUT_DOUBLE);
    win = glutCreateWindow(Demo);
+   glewInit();
    glutReshapeFunc(Reshape);
    glutKeyboardFunc(key);
    glutSpecialFunc(specialkey);
diff --git a/progs/glsl/toyball.c b/progs/glsl/toyball.c
index 37ad6bf291..c502f24077 100644
--- a/progs/glsl/toyball.c
+++ b/progs/glsl/toyball.c
@@ -9,10 +9,8 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <math.h>
-#include <GL/gl.h>
+#include <GL/glew.h>
 #include <GL/glut.h>
-#include <GL/glext.h>
-#include "extfuncs.h"
 #include "shaderutil.h"
 
 
@@ -26,18 +24,18 @@ static GLuint program;
 
 
 static struct uniform_info Uniforms[] = {
-   { "LightDir",       4, GL_FLOAT, { 0.57737, 0.57735, 0.57735, 0.0 }, -1 },
-   { "HVector",        4, GL_FLOAT, { 0.32506, 0.32506, 0.88808, 0.0 }, -1 },
-   { "BallCenter",     4, GL_FLOAT, { 0.0, 0.0, 0.0, 1.0 }, -1 },
-   { "SpecularColor",  4, GL_FLOAT, { 0.4, 0.4, 0.4, 60.0 }, -1 },
-   { "Red",         4, GL_FLOAT, { 0.6, 0.0, 0.0, 1.0 }, -1 },
-   { "Blue",        4, GL_FLOAT, { 0.0, 0.3, 0.6, 1.0 }, -1 },
-   { "Yellow",      4, GL_FLOAT, { 0.6, 0.5, 0.0, 1.0 }, -1 },
-   { "HalfSpace0",  4, GL_FLOAT, { 1.0, 0.0, 0.0, 0.2 }, -1 },
-   { "HalfSpace1",  4, GL_FLOAT, { 0.309016994, 0.951056516, 0.0, 0.2 }, -1 },
-   { "HalfSpace2",  4, GL_FLOAT, { -0.809016994, 0.587785252, 0.0, 0.2 }, -1 },
-   { "HalfSpace3",  4, GL_FLOAT, { -0.809016994, -0.587785252, 0.0, 0.2 }, -1 },
-   { "HalfSpace4",  4, GL_FLOAT, { 0.309116994, -0.951056516, 0.0, 0.2 }, -1 },
+   { "LightDir",    1, GL_FLOAT_VEC4, { 0.57737, 0.57735, 0.57735, 0.0 }, -1 },
+   { "HVector",     1, GL_FLOAT_VEC4, { 0.32506, 0.32506, 0.88808, 0.0 }, -1 },
+   { "BallCenter",  1, GL_FLOAT_VEC4, { 0.0, 0.0, 0.0, 1.0 }, -1 },
+   { "SpecularColor", 1, GL_FLOAT_VEC4, { 0.4, 0.4, 0.4, 60.0 }, -1 },
+   { "Red",         1, GL_FLOAT_VEC4, { 0.6, 0.0, 0.0, 1.0 }, -1 },
+   { "Blue",        1, GL_FLOAT_VEC4, { 0.0, 0.3, 0.6, 1.0 }, -1 },
+   { "Yellow",      1, GL_FLOAT_VEC4, { 0.6, 0.5, 0.0, 1.0 }, -1 },
+   { "HalfSpace0",  1, GL_FLOAT_VEC4, { 1.0, 0.0, 0.0, 0.2 }, -1 },
+   { "HalfSpace1",  1, GL_FLOAT_VEC4, { 0.309016994, 0.951056516, 0.0, 0.2 }, -1 },
+   { "HalfSpace2",  1, GL_FLOAT_VEC4, { -0.809016994, 0.587785252, 0.0, 0.2 }, -1 },
+   { "HalfSpace3",  1, GL_FLOAT_VEC4, { -0.809016994, -0.587785252, 0.0, 0.2 }, -1 },
+   { "HalfSpace4",  1, GL_FLOAT_VEC4, { 0.309116994, -0.951056516, 0.0, 0.2 }, -1 },
    { "InOrOutInit", 1, GL_FLOAT, { -3.0, 0, 0, 0 }, -1 },
    { "StripeWidth", 1, GL_FLOAT, {  0.3, 0, 0, 0 }, -1 },
    { "FWidth",      1, GL_FLOAT, { 0.005, 0, 0, 0 }, -1 },
@@ -99,9 +97,9 @@ Reshape(int width, int height)
 static void
 CleanUp(void)
 {
-   glDeleteShader_func(fragShader);
-   glDeleteShader_func(vertShader);
-   glDeleteProgram_func(program);
+   glDeleteShader(fragShader);
+   glDeleteShader(vertShader);
+   glDeleteProgram(program);
    glutDestroyWindow(win);
 }
 
@@ -169,15 +167,14 @@ Init(void)
    if (!ShadersSupported())
       exit(1);
 
-   GetExtensionFuncs();
-
    vertShader = CompileShaderFile(GL_VERTEX_SHADER, VertProgFile);
    fragShader = CompileShaderFile(GL_FRAGMENT_SHADER, FragProgFile);
    program = LinkShaders(vertShader, fragShader);
 
-   glUseProgram_func(program);
+   glUseProgram(program);
 
-   InitUniforms(program, Uniforms);
+   SetUniformValues(program, Uniforms);
+   PrintUniforms(Uniforms);
 
    assert(glGetError() == 0);
 
@@ -208,10 +205,10 @@ 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]);
+   glewInit();
    glutReshapeFunc(Reshape);
    glutKeyboardFunc(Key);
    glutSpecialFunc(SpecialKey);
diff --git a/progs/glsl/toyball.shtest b/progs/glsl/toyball.shtest
new file mode 100644
index 0000000000..887663abd3
--- /dev/null
+++ b/progs/glsl/toyball.shtest
@@ -0,0 +1,17 @@
+vs CH11-toyball.vert
+fs CH11-toyball.frag
+uniform LightDir      GL_FLOAT_VEC4 0.57737 0.57735 0.57735 0.0
+uniform HVector       GL_FLOAT_VEC4 0.32506 0.32506 0.88808 0.0
+uniform BallCenter    GL_FLOAT_VEC4 0.0 0.0 0.0 1.0
+uniform SpecularColor GL_FLOAT_VEC4 0.4 0.4 0.4 60.0
+uniform Red           GL_FLOAT_VEC4 0.6 0.0 0.0 1.0
+uniform Blue          GL_FLOAT_VEC4 0.0 0.3 0.6 1.0
+uniform Yellow        GL_FLOAT_VEC4 0.6 0.5 0.0 1.0
+uniform HalfSpace0    GL_FLOAT_VEC4 1.0 0.0 0.0 0.2
+uniform HalfSpace1    GL_FLOAT_VEC4 .309016994 0.951056516 0.0 0.2
+uniform HalfSpace2    GL_FLOAT_VEC4 -0.809016994 0.587785252 0.0 0.2
+uniform HalfSpace3    GL_FLOAT_VEC4 -0.809016994 -0.587785252 0.0 0.2
+uniform HalfSpace4    GL_FLOAT_VEC4 .309116994 -0.951056516 0.0 0.2
+uniform InOrOutInit   GL_FLOAT -3.0
+uniform StripeWidth   GL_FLOAT 0.3
+uniform FWidth        GL_FLOAT .005
diff --git a/progs/glsl/trirast.c b/progs/glsl/trirast.c
index 89df64fc71..53bd91ef97 100644
--- a/progs/glsl/trirast.c
+++ b/progs/glsl/trirast.c
@@ -15,10 +15,8 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <math.h>
-#include <GL/gl.h>
+#include <GL/glew.h>
 #include <GL/glut.h>
-#include <GL/glext.h>
-#include "extfuncs.h"
 #include "shaderutil.h"
 
 
@@ -85,9 +83,9 @@ Redisplay(void)
    RotateVerts(Zrot, 3, TriVerts, v);
    ComputeBounds(3, v, &xmin, &ymin, &xmax, &ymax);
 
-   glUniform2fv_func(uv0, 1, v[0]);
-   glUniform2fv_func(uv1, 1, v[1]);
-   glUniform2fv_func(uv2, 1, v[2]);
+   glUniform2fv(uv0, 1, v[0]);
+   glUniform2fv(uv1, 1, v[1]);
+   glUniform2fv(uv2, 1, v[2]);
 
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 
@@ -132,9 +130,9 @@ Reshape(int width, int height)
 static void
 CleanUp(void)
 {
-   glDeleteShader_func(fragShader);
-   glDeleteShader_func(vertShader);
-   glDeleteProgram_func(program);
+   glDeleteShader(fragShader);
+   glDeleteShader(vertShader);
+   glDeleteProgram(program);
    glutDestroyWindow(win);
 }
 
@@ -196,17 +194,15 @@ Init(void)
    if (!ShadersSupported())
       exit(1);
 
-   GetExtensionFuncs();
-
    vertShader = CompileShaderText(GL_VERTEX_SHADER, vertShaderText);
    fragShader = CompileShaderText(GL_FRAGMENT_SHADER, fragShaderText);
    program = LinkShaders(vertShader, fragShader);
 
-   glUseProgram_func(program);
+   glUseProgram(program);
 
-   uv0 = glGetUniformLocation_func(program, "v0");
-   uv1 = glGetUniformLocation_func(program, "v1");
-   uv2 = glGetUniformLocation_func(program, "v2");
+   uv0 = glGetUniformLocation(program, "v0");
+   uv1 = glGetUniformLocation(program, "v1");
+   uv2 = glGetUniformLocation(program, "v2");
    printf("Uniforms: %d %d %d\n", uv0, uv1, uv2);
 
    /*assert(glGetError() == 0);*/
@@ -216,9 +212,9 @@ Init(void)
 
    printf("GL_RENDERER = %s\n",(const char *) glGetString(GL_RENDERER));
 
-   assert(glIsProgram_func(program));
-   assert(glIsShader_func(fragShader));
-   assert(glIsShader_func(vertShader));
+   assert(glIsProgram(program));
+   assert(glIsShader(fragShader));
+   assert(glIsShader(vertShader));
 
    glColor3f(1, 0, 0);
 }
@@ -243,10 +239,10 @@ int
 main(int argc, char *argv[])
 {
    glutInit(&argc, argv);
-   glutInitWindowPosition( 0, 0);
    glutInitWindowSize(WinWidth, WinHeight);
    glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
    win = glutCreateWindow(argv[0]);
+   glewInit();
    glutReshapeFunc(Reshape);
    glutKeyboardFunc(Key);
    glutDisplayFunc(Redisplay);
diff --git a/progs/glsl/twoside.c b/progs/glsl/twoside.c
index 06488bd175..a57484f96c 100644
--- a/progs/glsl/twoside.c
+++ b/progs/glsl/twoside.c
@@ -12,10 +12,8 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <math.h>
-#include <GL/gl.h>
+#include <GL/glew.h>
 #include <GL/glut.h>
-#include <GL/glext.h>
-#include "extfuncs.h"
 #include "shaderutil.h"
 
 
@@ -59,11 +57,11 @@ Redisplay(void)
    glFrontFace(FrontWinding);
 
    if (DetermineFacingInFragProg) {
-      glUniform1i_func(u_fragface, 1);
+      glUniform1i(u_fragface, 1);
       glDisable(GL_VERTEX_PROGRAM_TWO_SIDE);
    }
    else {
-      glUniform1i_func(u_fragface, 0);
+      glUniform1i(u_fragface, 0);
       glEnable(GL_VERTEX_PROGRAM_TWO_SIDE);
    }
 
@@ -75,7 +73,7 @@ Redisplay(void)
    /* Draw a tristrip ring */
    glBegin(GL_TRIANGLE_STRIP);
    glColor4fv(Red);
-   glSecondaryColor3fv_func(Green);
+   glSecondaryColor3fv(Green);
    for (i = 0; i <= sections; i++) {
       float a = (float) i / (sections) * M_PI * 2.0;
       float x = radius * cos(a);
@@ -125,9 +123,9 @@ Reshape(int width, int height)
 static void
 CleanUp(void)
 {
-   glDeleteShader_func(fragShader);
-   glDeleteShader_func(vertShader);
-   glDeleteProgram_func(program);
+   glDeleteShader(fragShader);
+   glDeleteShader(vertShader);
+   glDeleteProgram(program);
    glutDestroyWindow(win);
 }
 
@@ -229,15 +227,13 @@ Init(void)
    if (!ShadersSupported())
       exit(1);
 
-   GetExtensionFuncs();
-
    vertShader = CompileShaderText(GL_VERTEX_SHADER, vertShaderText);
    fragShader = CompileShaderText(GL_FRAGMENT_SHADER, fragShaderText);
    program = LinkShaders(vertShader, fragShader);
 
-   glUseProgram_func(program);
+   glUseProgram(program);
 
-   u_fragface = glGetUniformLocation_func(program, "fragface");
+   u_fragface = glGetUniformLocation(program, "fragface");
    printf("Uniforms: %d\n", u_fragface);
 
    /*assert(glGetError() == 0);*/
@@ -246,9 +242,9 @@ Init(void)
 
    printf("GL_RENDERER = %s\n",(const char *) glGetString(GL_RENDERER));
 
-   assert(glIsProgram_func(program));
-   assert(glIsShader_func(fragShader));
-   assert(glIsShader_func(vertShader));
+   assert(glIsProgram(program));
+   assert(glIsShader(fragShader));
+   assert(glIsShader(vertShader));
 
    glEnable(GL_DEPTH_TEST);
 
@@ -289,10 +285,10 @@ int
 main(int argc, char *argv[])
 {
    glutInit(&argc, argv);
-   glutInitWindowPosition( 0, 0);
    glutInitWindowSize(WinWidth, WinHeight);
    glutInitDisplayMode(GLUT_RGB | GLUT_DEPTH | GLUT_DOUBLE);
    win = glutCreateWindow(argv[0]);
+   glewInit();
    glutReshapeFunc(Reshape);
    glutKeyboardFunc(Key);
    glutDisplayFunc(Redisplay);
diff --git a/progs/glsl/vert-or-frag-only.c b/progs/glsl/vert-or-frag-only.c
index f6eedd8327..148991ca83 100644
--- a/progs/glsl/vert-or-frag-only.c
+++ b/progs/glsl/vert-or-frag-only.c
@@ -11,10 +11,8 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <math.h>
-#include <GL/gl.h>
+#include <GL/glew.h>
 #include <GL/glut.h>
-#include <GL/glext.h>
-#include "extfuncs.h"
 #include "shaderutil.h"
 
 
@@ -58,14 +56,14 @@ Redisplay(void)
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 
    /* render with vertex shader only */
-   glUseProgram_func(VertProgram);
+   glUseProgram(VertProgram);
    glPushMatrix();
    glTranslatef(-1.5, 0, 0);
    DrawQuadTex();
    glPopMatrix();
 
    /* render with fragment shader only */
-   glUseProgram_func(FragProgram);
+   glUseProgram(FragProgram);
    glPushMatrix();
    glTranslatef(+1.5, 0, 0);
    DrawQuadColor();
@@ -90,10 +88,10 @@ Reshape(int width, int height)
 static void
 CleanUp(void)
 {
-   glDeleteShader_func(FragShader);
-   glDeleteShader_func(VertShader);
-   glDeleteProgram_func(VertProgram);
-   glDeleteProgram_func(FragProgram);
+   glDeleteShader(FragShader);
+   glDeleteShader(VertShader);
+   glDeleteProgram(VertProgram);
+   glDeleteProgram(FragProgram);
    glutDestroyWindow(Win);
 }
 
@@ -129,8 +127,6 @@ Init(void)
    if (!ShadersSupported())
       exit(1);
 
-   GetExtensionFuncs();
-
    if (FragProgFile)
       FragShader = CompileShaderFile(GL_FRAGMENT_SHADER, FragProgFile);
    else
@@ -149,10 +145,10 @@ Init(void)
 
    printf("GL_RENDERER = %s\n",(const char *) glGetString(GL_RENDERER));
 
-   assert(glIsProgram_func(VertProgram));
-   assert(glIsProgram_func(FragProgram));
-   assert(glIsShader_func(FragShader));
-   assert(glIsShader_func(VertShader));
+   assert(glIsProgram(VertProgram));
+   assert(glIsProgram(FragProgram));
+   assert(glIsShader(FragShader));
+   assert(glIsShader(VertShader));
 
    glColor3f(1, 0, 0);
 }
@@ -177,10 +173,10 @@ int
 main(int argc, char *argv[])
 {
    glutInit(&argc, argv);
-   glutInitWindowPosition( 0, 0);
    glutInitWindowSize(400, 200);
    glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
    Win = glutCreateWindow(argv[0]);
+   glewInit();
    glutReshapeFunc(Reshape);
    glutKeyboardFunc(Key);
    glutDisplayFunc(Redisplay);
diff --git a/progs/glsl/vert-tex.c b/progs/glsl/vert-tex.c
index 9d00a61054..4c8bfa587a 100644
--- a/progs/glsl/vert-tex.c
+++ b/progs/glsl/vert-tex.c
@@ -9,10 +9,8 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <math.h>
-#include <GL/gl.h>
+#include <GL/glew.h>
 #include <GL/glut.h>
-#include <GL/glext.h>
-#include "extfuncs.h"
 #include "shaderutil.h"
 
 
@@ -45,7 +43,7 @@ static GLfloat xRot = -70.0f, yRot = 0.0f, zRot = 0.0f;
 
 /* value[0] = tex unit */
 static struct uniform_info Uniforms[] = {
-   { "tex1",  1, GL_INT, { 0, 0, 0, 0 }, -1 },
+   { "tex1",  1, GL_SAMPLER_2D, { 0, 0, 0, 0 }, -1 },
    END_OF_UNIFORMS
 };
 
@@ -133,9 +131,9 @@ Reshape(int width, int height)
 static void
 CleanUp(void)
 {
-   glDeleteShader_func(fragShader);
-   glDeleteShader_func(vertShader);
-   glDeleteProgram_func(program);
+   glDeleteShader(fragShader);
+   glDeleteShader(vertShader);
+   glDeleteProgram(program);
    glutDestroyWindow(win);
 }
 
@@ -239,13 +237,11 @@ Init(void)
    if (!ShadersSupported())
       exit(1);
 
-   GetExtensionFuncs();
-
    vertShader = CompileShaderText(GL_VERTEX_SHADER, VertShaderText);
    fragShader = CompileShaderText(GL_FRAGMENT_SHADER, FragShaderText);
    program = LinkShaders(vertShader, fragShader);
 
-   glUseProgram_func(program);
+   glUseProgram(program);
 
    assert(glGetError() == 0);
 
@@ -266,6 +262,7 @@ main(int argc, char *argv[])
    glutInitWindowSize(500, 500);
    glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
    win = glutCreateWindow(argv[0]);
+   glewInit();
    glutReshapeFunc(Reshape);
    glutKeyboardFunc(Key);
    glutSpecialFunc(SpecialKey);