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/* Test GL_NV_fragment_program */
#include <assert.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#define GL_GLEXT_PROTOTYPES
#include <GL/glut.h>
static void Display( void )
{
glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
glPushMatrix();
glColor4f(0, 0.5, 0, 1);
glColor4f(0, 1, 0, 1);
glBegin(GL_POLYGON);
glVertex2f(-1, -1);
glVertex2f( 1, -1);
glVertex2f( 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 *prog0 =
"!!FP1.0\n"
"MUL o[COLR], R0, f[WPOS]; \n"
"ADD o[COLH], H3, f[TEX0]; \n"
"ADD_SAT o[COLH], H3, f[TEX0]; \n"
"ADDX o[COLH], H3, f[TEX0]; \n"
"ADDHC o[COLH], H3, f[TEX0]; \n"
"ADDXC o[COLH], H3, f[TEX0]; \n"
"ADDXC_SAT o[COLH], H30, f[TEX0]; \n"
"MUL o[COLR].xy, R0.wzyx, f[WPOS]; \n"
"MUL o[COLR], H0, f[WPOS]; \n"
"MUL o[COLR], -H0, f[WPOS]; \n"
"MOV RC, H1; \n"
"MOV HC, H2; \n"
"END \n"
;
/* masked updates, defines, declarations */
static const char *prog1 =
"!!FP1.0\n"
"DEFINE foo = {1, 2, 3, 4}; \n"
"DEFINE foo2 = 5; \n"
"DECLARE foo3 = {5, 6, 7, 8}; \n"
"DECLARE bar = 3; \n"
"DECLARE bar2; \n"
"DECLARE bar3 = bar; \n"
"#DECLARE bar4 = { a, b, c, d }; \n"
"MOV o[COLR].xy, R0; \n"
"MOV o[COLR] (NE), R0; \n"
"MOV o[COLR] (NE.wzyx), R0; \n"
"MOV o[COLR].xy (NE.wzyx), R0; \n"
"MOV RC.x (EQ), R1.x; \n"
"KIL NE; \n"
"KIL EQ.xyxy; \n"
"END \n"
;
/* texture instructions */
static const char *prog2 =
"!!FP1.0\n"
"TEX R0, f[TEX0], TEX0, 2D; \n"
"TEX R1, f[TEX1], TEX1, CUBE; \n"
"TEX R2, f[TEX2], TEX2, 3D; \n"
"TXP R3, f[TEX3], TEX3, RECT; \n"
"TXD R3, R2, R1, f[TEX3], TEX3, RECT; \n"
"MUL o[COLR], R0, f[COL0]; \n"
"END \n"
;
/* test negation, absolute value */
static const char *prog3 =
"!!FP1.0\n"
"MOV R0, -R1; \n"
"MOV R0, +R1; \n"
"MOV R0, |-R1|; \n"
"MOV R0, |+R1|; \n"
"MOV R0, -|R1|; \n"
"MOV R0, +|R1|; \n"
"MOV R0, -|-R1|; \n"
"MOV R0, -|+R1|; \n"
"MOV o[COLR], R0; \n"
"END \n"
;
/* literal constant sources */
static const char *prog4 =
"!!FP1.0\n"
"DEFINE Pi = 3.14159; \n"
"MOV R0, {1, -2, +3, 4}; \n"
"MOV R0, 5; \n"
"MOV R0, -5; \n"
"MOV R0, +5; \n"
"MOV R0, Pi; \n"
"MOV o[COLR], R0; \n"
"END \n"
;
/* change the fragment color in a simple way */
static const char *prog10 =
"!!FP1.0\n"
"DEFINE blue = {0, 0, 1, 0};\n"
"DECLARE color; \n"
"MOV R0, f[COL0]; \n"
"#ADD o[COLR], R0, f[COL0]; \n"
"#ADD o[COLR], blue, f[COL0]; \n"
"#ADD o[COLR], {1, 0, 0, 0}, f[COL0]; \n"
"ADD o[COLR], color, f[COL0]; \n"
"END \n"
;
GLuint progs[20];
if (!glutExtensionSupported ("GL_NV_fragment_program")) {
printf("Sorry, this program requires GL_NV_fragment_program\n");
exit(1);
}
glGenProgramsNV(20, progs);
assert(progs[0]);
assert(progs[1]);
assert(progs[0] != progs[1]);
#if 0
glLoadProgramNV(GL_FRAGMENT_PROGRAM_NV, progs[0],
strlen(prog0),
(const GLubyte *) prog0);
assert(glIsProgramNV(progs[0]));
#endif
glLoadProgramNV(GL_FRAGMENT_PROGRAM_NV, progs[1],
strlen(prog1),
(const GLubyte *) prog1);
assert(glIsProgramNV(progs[1]));
glLoadProgramNV(GL_FRAGMENT_PROGRAM_NV, progs[2],
strlen(prog2),
(const GLubyte *) prog2);
assert(glIsProgramNV(progs[2]));
glBindProgramNV(GL_FRAGMENT_PROGRAM_NV, progs[2]);
glLoadProgramNV(GL_FRAGMENT_PROGRAM_NV, progs[3],
strlen(prog3),
(const GLubyte *) prog3);
assert(glIsProgramNV(progs[3]));
glBindProgramNV(GL_FRAGMENT_PROGRAM_NV, progs[3]);
glLoadProgramNV(GL_FRAGMENT_PROGRAM_NV, progs[4],
strlen(prog4),
(const GLubyte *) prog4);
assert(glIsProgramNV(progs[4]));
glBindProgramNV(GL_FRAGMENT_PROGRAM_NV, progs[4]);
/* a real program */
glLoadProgramNV(GL_FRAGMENT_PROGRAM_NV, progs[10],
strlen(prog10),
(const GLubyte *) prog10);
assert(glIsProgramNV(progs[10]));
glBindProgramNV(GL_FRAGMENT_PROGRAM_NV, progs[10]);
glProgramNamedParameter4fNV(progs[10],
strlen("color"), (const GLubyte *) "color",
1, 0, 0, 1);
glEnable(GL_FRAGMENT_PROGRAM_NV);
glEnable(GL_ALPHA_TEST);
glAlphaFunc(GL_ALWAYS, 0.0);
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]);
glutReshapeFunc( Reshape );
glutKeyboardFunc( Key );
glutDisplayFunc( Display );
Init();
glutMainLoop();
return 0;
}
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