progs/trivial/vp-tri.c

   1 /* Test glGenProgramsNV(), glIsProgramNV(), glLoadProgramNV() */
   2
   3 #include <assert.h>
   4 #include <string.h>
   5 #include <stdio.h>
   6 #include <stdlib.h>
   7 #include <math.h>
   8 #include <GL/glew.h>
   9 #include <GL/glut.h>
  10
  11 static void Init( void )
  12 {
  13    GLint errno;
  14    GLuint prognum;
  15
  16    static const char *prog1 =
  17       "!!ARBvp1.0\n"
  18       "MOV  result.color, vertex.color;\n"
  19 /*       "MOV  result.color, {0,0,0,1};\n"  */
  20       "MOV  result.position, vertex.position;\n"
  21       "END\n";
  22
  23
  24    glGenProgramsARB(1, &prognum);
  25
  26    glBindProgramARB(GL_VERTEX_PROGRAM_ARB, prognum);
  27    glProgramStringARB(GL_VERTEX_PROGRAM_ARB, GL_PROGRAM_FORMAT_ASCII_ARB,
  28                       strlen(prog1), (const GLubyte *) prog1);
  29
  30    assert(glIsProgramARB(prognum));
  31    errno = glGetError();
  32    printf("glGetError = %d\n", errno);
  33    if (errno != GL_NO_ERROR)
  34    {
  35       GLint errorpos;
  36
  37       glGetIntegerv(GL_PROGRAM_ERROR_POSITION_ARB, &errorpos);
  38       printf("errorpos: %d\n", errorpos);
  39       printf("%s\n", (char *)glGetString(GL_PROGRAM_ERROR_STRING_ARB));
  40    }
  41 }
  42
  43 static void Display( void )
  44 {
  45    glClearColor(0.3, 0.3, 0.3, 1);
  46    glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
  47
  48    glEnable(GL_VERTEX_PROGRAM_NV);
  49
  50    glBegin(GL_TRIANGLES);
  51    glColor3f(0,0,.7);
  52    glVertex3f( 0.9, -0.9, -0.0);
  53    glColor3f(.8,0,0);
  54    glVertex3f( 0.9,  0.9, -0.0);
  55    glColor3f(0,.9,0);
  56    glVertex3f(-0.9,  0.0, -0.0);
  57    glEnd();
  58
  59
  60    glFlush();
  61 }
  62
  63
  64 static void Reshape( int width, int height )
  65 {
  66    glViewport( 0, 0, width, height );
  67    glMatrixMode( GL_PROJECTION );
  68    glLoadIdentity();
  69    glOrtho(-1.0, 1.0, -1.0, 1.0, -0.5, 1000.0);
  70    glMatrixMode( GL_MODELVIEW );
  71    glLoadIdentity();
  72    /*glTranslatef( 0.0, 0.0, -15.0 );*/
  73 }
  74
  75
  76 static void Key( unsigned char key, int x, int y )
  77 {
  78    (void) x;
  79    (void) y;
  80    switch (key) {
  81       case 27:
  82          exit(0);
  83          break;
  84    }
  85    glutPostRedisplay();
  86 }
  87
  88
  89
  90
  91 int main( int argc, char *argv[] )
  92 {
  93    glutInit( &argc, argv );
  94    glutInitWindowPosition( 0, 0 );
  95    glutInitWindowSize( 250, 250 );
  96    glutInitDisplayMode( GLUT_DEPTH | GLUT_RGB | GLUT_SINGLE );
  97    glutCreateWindow(argv[0]);
  98    glewInit();
  99    glutReshapeFunc( Reshape );
 100    glutKeyboardFunc( Key );
 101    glutDisplayFunc( Display );
 102    Init();
 103    glutMainLoop();
 104    return 0;
 105 }