vpglsl: build with scons and glew

progs/SConscript

@@ -5,5 +5,6 @@ SConscript([
     'samples/SConscript',
     'trivial/SConscript',
     'vp/SConscript',
+    'vpglsl/SConscript',
     'fp/SConscript',
 ])

progs/vpglsl/Makefile

@@ -7,7 +7,7 @@
 TOP = ../..
 include $(TOP)/configs/current
 
-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)
 
 SOURCES = \
 	vp-tris.c

progs/vpglsl/vp-tris.c

@@ -4,7 +4,8 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <math.h>
-#define GL_GLEXT_PROTOTYPES
+
+#include <GL/glew.h>
 #include <GL/glut.h>
 
 static const char *filename = NULL;
@@ -99,6 +100,7 @@ static void setup_uniforms()
 
    }
 
+   {
       GLuint loc1f = glGetUniformLocationARB(program, "KernelValue1f");
       GLuint loc2f = glGetUniformLocationARB(program, "KernelValue2f");
       GLuint loc4f = glGetUniformLocationARB(program, "KernelValue4f");
@@ -120,6 +122,7 @@ static void setup_uniforms()
 
       if (loc4f >= 0)
          glUniform4fv(loc4f, 4, vecKer);
+   }
 }
 
 static void prepare_shaders()
@@ -303,6 +306,7 @@ int main( int argc, char *argv[] )
    glutInitWindowSize( 250, 250 );
    glutInitDisplayMode( GLUT_RGB | GLUT_SINGLE | GLUT_DEPTH );
    glutCreateWindow(argv[0]);
+   glewInit();
    glutReshapeFunc( Reshape );
    glutKeyboardFunc( Key );
    glutDisplayFunc( Display );