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/* Test glGenProgramsNV(), glIsProgramNV(), glLoadProgramNV() */
#include <assert.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <GL/glew.h>
#include <GL/glut.h>
static void Display( void )
{
glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
glPushMatrix();
glBegin(GL_POLYGON);
glVertexAttrib2fNV(0, -1, -1);
glVertexAttrib2fNV(0, 1, -1);
glVertexAttrib2fNV(0, 0, 1);
glEnd();
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( 0.0, 0.0, -15.0 );
}
static void Key( unsigned char key, int x, int y )
{
(void) x;
(void) y;
switch (key) {
case 27:
exit(0);
break;
}
glutPostRedisplay();
}
static void Init( void )
{
static const char *prog1 =
"!!VP1.0\n"
"MUL o[COL0].xyz, R0, c[35]; \n"
"END\n";
static const char *prog2 =
"!!VP1.0\n"
"#\n"
"# c[0-3] = modelview projection (composite) matrix\n"
"# c[32] = normalized light direction in object-space\n"
"# c[35] = yellow diffuse material, (1.0, 1.0, 0.0, 1.0)\n"
"# c[64].x = 0.0\n"
"# c[64].z = 0.125, a scaling factor\n"
"#\n"
"# outputs diffuse illumination for color and perturbed position\n"
"#\n"
"DP3 R0, c[32], v[NRML]; # light direction DOT normal\n"
"MUL o[COL0].xyz, R0, c[35]; \n"
"MAX R0, c[64].x, R0; \n"
"MUL R0, R0, v[NRML]; \n"
"MUL R0, R0, c[64].z; \n"
"ADD R1, v[OPOS], -R0; # perturb object space position\n"
"DP4 o[HPOS].x, c[0], R1; \n"
"DP4 o[HPOS].y, c[1], R1; \n"
"DP4 o[HPOS].z, c[2], R1; \n"
"DP4 o[HPOS].w, c[3], R1; \n"
"END\n";
static const char *prog3 =
"!!VP1.0\n"
"DP4 o[HPOS].x, c[0], v[OPOS];\n"
"DP4 o[HPOS].y, c[1], v[OPOS];\n"
"DP4 o[HPOS].z, c[2], v[OPOS];\n"
"DP4 o[HPOS].w, c[3], v[OPOS];\n"
"DP3 R0.x, c[4], v[NRML];\n"
"DP3 R0.y, c[5], v[NRML]; \n"
"DP3 R0.z, c[6], v[NRML]; # R0 = n' = transformed normal\n"
"DP3 R1.x, c[32], R0; # R1.x = Lpos DOT n'\n"
"DP3 R1.y, c[33], R0; # R1.y = hHat DOT n'\n"
"MOV R1.w, c[38].x; # R1.w = specular power\n"
"LIT R2, R1; # Compute lighting values\n"
"MAD R3, c[35].x, R2.y, c[35].y; # diffuse + emissive\n"
"MAD o[COL0].xyz, c[36], R2.z, R3; # + specular\n"
"END\n";
static const char *prog4 =
"!!VP1.0\n"
"DP4 R2, R3, c[A0.x];\n"
"DP4 R2, R3, c[A0.x + 5];\n"
"DP4 o[HPOS], R3, c[A0.x - 4];\n"
"END\n";
static const char *prog5 =
"!!VSP1.0\n"
"DP4 R2, R3, c[A0.x];\n"
"DP4 R2, R3, v[0];\n"
"DP4 c[3], R3, R2;\n"
"END\n";
GLuint progs[5];
glGenProgramsNV(2, progs);
assert(progs[0]);
assert(progs[1]);
assert(progs[0] != progs[1]);
glGenProgramsNV(3, progs + 2);
assert(progs[2]);
assert(progs[3]);
assert(progs[2] != progs[3]);
assert(progs[0] != progs[2]);
glLoadProgramNV(GL_VERTEX_PROGRAM_NV, 1,
strlen(prog1),
(const GLubyte *) prog1);
assert(!glIsProgramNV(1));
glLoadProgramNV(GL_VERTEX_PROGRAM_NV, 2,
strlen(prog2),
(const GLubyte *) prog2);
assert(glIsProgramNV(2));
glLoadProgramNV(GL_VERTEX_PROGRAM_NV, 3,
strlen(prog3),
(const GLubyte *) prog3);
assert(glIsProgramNV(3));
glLoadProgramNV(GL_VERTEX_PROGRAM_NV, 4,
strlen(prog4),
(const GLubyte *) prog4);
assert(glIsProgramNV(4));
glLoadProgramNV(GL_VERTEX_STATE_PROGRAM_NV, 5,
strlen(prog5),
(const GLubyte *) prog5);
assert(glIsProgramNV(5));
printf("glGetError = %d\n", (int) glGetError());
}
int main( int argc, char *argv[] )
{
glutInit( &argc, argv );
glutInitWindowPosition( 0, 0 );
glutInitWindowSize( 250, 250 );
glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH );
glutCreateWindow(argv[0]);
glewInit();
glutReshapeFunc( Reshape );
glutKeyboardFunc( Key );
glutDisplayFunc( Display );
Init();
glutMainLoop();
return 0;
}
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