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