src/tests/fptest1.c

   1 /* Test GL_NV_fragment_program */
   2
   3 #include <assert.h>
   4 #include <string.h>
   5 #include <stdio.h>
   6 #include <stdlib.h>
   7 #include <math.h>
   8 #define GL_GLEXT_PROTOTYPES
   9 #include <GL/glut.h>
  10
  11
  12
  13 static void Display( void )
  14 {
  15    glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
  16
  17    glPushMatrix();
  18
  19    glColor4f(0, 0.5, 0, 1);
  20    glColor4f(0, 1, 0, 1);
  21    glBegin(GL_POLYGON);
  22    glVertex2f(-1, -1);
  23    glVertex2f( 1, -1);
  24    glVertex2f( 0,  1);
  25    glEnd();
  26
  27    glPopMatrix();
  28
  29    glutSwapBuffers();
  30 }
  31
  32
  33 static void Reshape( int width, int height )
  34 {
  35    glViewport( 0, 0, width, height );
  36    glMatrixMode( GL_PROJECTION );
  37    glLoadIdentity();
  38    glFrustum( -1.0, 1.0, -1.0, 1.0, 5.0, 25.0 );
  39    glMatrixMode( GL_MODELVIEW );
  40    glLoadIdentity();
  41    glTranslatef( 0.0, 0.0, -15.0 );
  42 }
  43
  44
  45 static void Key( unsigned char key, int x, int y )
  46 {
  47    (void) x;
  48    (void) y;
  49    switch (key) {
  50       case 27:
  51          exit(0);
  52          break;
  53    }
  54    glutPostRedisplay();
  55 }
  56
  57
  58 static void Init( void )
  59 {
  60    static const char *prog0 =
  61       "!!FP1.0\n"
  62       "MUL   o[COLR], R0, f[WPOS]; \n"
  63       "ADD   o[COLH], H3, f[TEX0]; \n"
  64       "ADD_SAT o[COLH], H3, f[TEX0]; \n"
  65       "ADDX o[COLH], H3, f[TEX0]; \n"
  66       "ADDHC o[COLH], H3, f[TEX0]; \n"
  67       "ADDXC o[COLH], H3, f[TEX0]; \n"
  68       "ADDXC_SAT o[COLH], H30, f[TEX0]; \n"
  69       "MUL   o[COLR].xy, R0.wzyx, f[WPOS]; \n"
  70       "MUL   o[COLR], H0, f[WPOS]; \n"
  71       "MUL   o[COLR], -H0, f[WPOS]; \n"
  72       "MOV   RC, H1; \n"
  73       "MOV   HC, H2; \n"
  74       "END \n"
  75       ;
  76
  77    /* masked updates, defines, declarations */
  78    static const char *prog1 =
  79       "!!FP1.0\n"
  80       "DEFINE foo = {1, 2, 3, 4}; \n"
  81       "DEFINE foo2 = 5; \n"
  82       "DECLARE foo3 = {5, 6, 7, 8}; \n"
  83       "DECLARE bar = 3; \n"
  84       "DECLARE bar2; \n"
  85       "DECLARE bar3 = bar; \n"
  86       "#DECLARE bar4 = { a, b, c, d }; \n"
  87       "MOV o[COLR].xy,   R0; \n"
  88       "MOV o[COLR] (NE), R0; \n"
  89       "MOV o[COLR] (NE.wzyx), R0; \n"
  90       "MOV o[COLR].xy (NE.wzyx), R0; \n"
  91       "MOV RC.x (EQ), R1.x; \n"
  92       "KIL NE; \n"
  93       "KIL EQ.xyxy; \n"
  94       "END \n"
  95       ;
  96
  97    /* texture instructions */
  98    static const char *prog2 =
  99       "!!FP1.0\n"
 100       "TEX R0, f[TEX0], TEX0, 2D; \n"
 101       "TEX R1, f[TEX1], TEX1, CUBE; \n"
 102       "TEX R2, f[TEX2], TEX2, 3D; \n"
 103       "TXP R3, f[TEX3], TEX3, RECT; \n"
 104       "TXD R3, R2, R1, f[TEX3], TEX3, RECT; \n"
 105       "MUL o[COLR], R0, f[COL0]; \n"
 106       "END \n"
 107       ;
 108
 109    /* test negation, absolute value */
 110    static const char *prog3 =
 111       "!!FP1.0\n"
 112       "MOV R0, -R1; \n"
 113       "MOV R0, +R1; \n"
 114       "MOV R0, |-R1|; \n"
 115       "MOV R0, |+R1|; \n"
 116       "MOV R0, -|R1|; \n"
 117       "MOV R0, +|R1|; \n"
 118       "MOV R0, -|-R1|; \n"
 119       "MOV R0, -|+R1|; \n"
 120       "MOV o[COLR], R0; \n"
 121       "END \n"
 122       ;
 123
 124    /* literal constant sources */
 125    static const char *prog4 =
 126       "!!FP1.0\n"
 127       "DEFINE Pi = 3.14159; \n"
 128       "MOV R0, {1, -2, +3, 4}; \n"
 129       "MOV R0, 5; \n"
 130       "MOV R0, -5; \n"
 131       "MOV R0, +5; \n"
 132       "MOV R0, Pi; \n"
 133       "MOV o[COLR], R0; \n"
 134       "END \n"
 135       ;
 136
 137    /* change the fragment color in a simple way */
 138    static const char *prog10 =
 139       "!!FP1.0\n"
 140       "DEFINE blue = {0, 0, 1, 0};\n"
 141       "DECLARE color; \n"
 142       "MOV R0, f[COL0]; \n"
 143       "#ADD o[COLR], R0, f[COL0]; \n"
 144       "#ADD o[COLR], blue, f[COL0]; \n"
 145       "#ADD o[COLR], {1, 0, 0, 0}, f[COL0]; \n"
 146       "ADD o[COLR], color, f[COL0]; \n"
 147       "END \n"
 148       ;
 149
 150    GLuint progs[20];
 151
 152    if (!glutExtensionSupported ("GL_NV_fragment_program")) {
 153            printf("Sorry, this program requires GL_NV_fragment_program\n");
 154            exit(1);
 155    }
 156
 157    glGenProgramsNV(20, progs);
 158    assert(progs[0]);
 159    assert(progs[1]);
 160    assert(progs[0] != progs[1]);
 161
 162 #if 0
 163    glLoadProgramNV(GL_FRAGMENT_PROGRAM_NV, progs[0],
 164                    strlen(prog0),
 165                    (const GLubyte *) prog0);
 166    assert(glIsProgramNV(progs[0]));
 167 #endif
 168
 169    glLoadProgramNV(GL_FRAGMENT_PROGRAM_NV, progs[1],
 170                    strlen(prog1),
 171                    (const GLubyte *) prog1);
 172    assert(glIsProgramNV(progs[1]));
 173
 174    glLoadProgramNV(GL_FRAGMENT_PROGRAM_NV, progs[2],
 175                    strlen(prog2),
 176                    (const GLubyte *) prog2);
 177    assert(glIsProgramNV(progs[2]));
 178    glBindProgramNV(GL_FRAGMENT_PROGRAM_NV, progs[2]);
 179
 180    glLoadProgramNV(GL_FRAGMENT_PROGRAM_NV, progs[3],
 181                    strlen(prog3),
 182                    (const GLubyte *) prog3);
 183    assert(glIsProgramNV(progs[3]));
 184    glBindProgramNV(GL_FRAGMENT_PROGRAM_NV, progs[3]);
 185
 186    glLoadProgramNV(GL_FRAGMENT_PROGRAM_NV, progs[4],
 187                    strlen(prog4),
 188                    (const GLubyte *) prog4);
 189    assert(glIsProgramNV(progs[4]));
 190    glBindProgramNV(GL_FRAGMENT_PROGRAM_NV, progs[4]);
 191
 192
 193    /* a real program */
 194    glLoadProgramNV(GL_FRAGMENT_PROGRAM_NV, progs[10],
 195                    strlen(prog10),
 196                    (const GLubyte *) prog10);
 197    assert(glIsProgramNV(progs[10]));
 198    glBindProgramNV(GL_FRAGMENT_PROGRAM_NV, progs[10]);
 199
 200    glProgramNamedParameter4fNV(progs[10],
 201                                strlen("color"), (const GLubyte *) "color",
 202                                1, 0, 0, 1);
 203
 204    glEnable(GL_FRAGMENT_PROGRAM_NV);
 205    glEnable(GL_ALPHA_TEST);
 206    glAlphaFunc(GL_ALWAYS, 0.0);
 207
 208    printf("glGetError = %d\n", (int) glGetError());
 209 }
 210
 211
 212 int main( int argc, char *argv[] )
 213 {
 214    glutInit( &argc, argv );
 215    glutInitWindowPosition( 0, 0 );
 216    glutInitWindowSize( 250, 250 );
 217    glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH );
 218    glutCreateWindow(argv[0]);
 219    glutReshapeFunc( Reshape );
 220    glutKeyboardFunc( Key );
 221    glutDisplayFunc( Display );
 222    Init();
 223    glutMainLoop();
 224    return 0;
 225 }