progs/tests/cva.c

   1 /* $Id: cva.c,v 1.2 2000/11/03 00:09:31 gareth Exp $ */
   2
   3 /*
   4  * Trivial CVA test, good for testing driver fastpaths (especially
   5  * indexed vertex buffers if they are supported).
   6  *
   7  * Gareth Hughes
   8  * November 2000
   9  */
  10
  11 #include <stdlib.h>
  12 #include <stdio.h>
  13 #include <string.h>
  14 #define GL_GLEXT_LEGACY
  15 #include <GL/glut.h>
  16
  17
  18 GLfloat verts[][4] = {
  19    { -0.5, -0.5, -2.0, 0.0 },
  20    {  0.5, -0.5, -2.0, 0.0 },
  21    { -0.5,  0.5, -2.0, 0.0 },
  22 };
  23
  24 GLubyte color[][4] = {
  25    { 0xff, 0x00, 0x00, 0x00 },
  26    { 0x00, 0xff, 0x00, 0x00 },
  27    { 0x00, 0x00, 0xff, 0x00 },
  28 };
  29
  30 GLuint indices[] = { 0, 1, 2 };
  31
  32 GLboolean compiled = GL_TRUE;
  33
  34
  35 void init( void )
  36 {
  37    glClearColor( 0.0, 0.0, 0.0, 0.0 );
  38    glShadeModel( GL_SMOOTH );
  39
  40    glEnable( GL_DEPTH_TEST );
  41
  42    glEnableClientState( GL_VERTEX_ARRAY );
  43    glEnableClientState( GL_COLOR_ARRAY );
  44
  45    glMatrixMode( GL_PROJECTION );
  46    glLoadIdentity();
  47    glFrustum( -1.0, 1.0, -1.0, 1.0, 2.0, 10.0 );
  48    glMatrixMode( GL_MODELVIEW );
  49    glLoadIdentity();
  50
  51    glVertexPointer( 3, GL_FLOAT, sizeof(verts[0]), verts );
  52    glColorPointer( 4, GL_UNSIGNED_BYTE, 0, color );
  53
  54 #ifdef GL_EXT_compiled_vertex_array
  55    if ( compiled ) {
  56       glLockArraysEXT( 0, 3 );
  57    }
  58 #endif
  59 }
  60
  61 void display( void )
  62 {
  63    glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
  64
  65    glDrawElements( GL_TRIANGLES, 3, GL_UNSIGNED_INT, indices );
  66
  67    glFlush();
  68 }
  69
  70 void keyboard( unsigned char key, int x, int y )
  71 {
  72    switch ( key ) {
  73       case 27:
  74          exit( 0 );
  75          break;
  76    }
  77 }
  78
  79 int main( int argc, char **argv )
  80 {
  81    char *string;
  82
  83    glutInit( &argc, argv );
  84    glutInitDisplayMode( GLUT_SINGLE | GLUT_RGB | GLUT_DEPTH );
  85    glutInitWindowSize( 250, 250 );
  86    glutInitWindowPosition( 100, 100 );
  87    glutCreateWindow( "CVA Test" );
  88
  89    /* Make sure the server supports GL 1.2 vertex arrays.
  90     */
  91    string = (char *) glGetString( GL_VERSION );
  92
  93    if ( !strstr( string, "1.2" ) ) {
  94       fprintf( stderr, "This program requires OpenGL 1.2 vertex arrays.\n" );
  95       exit( -1 );
  96    }
  97
  98    /* See if the server supports compiled vertex arrays.
  99     */
 100    string = (char *) glGetString( GL_EXTENSIONS );
 101
 102    if ( !strstr( string, "GL_EXT_compiled_vertex_array" ) ) {
 103       fprintf( stderr, "Compiled vertex arrays not supported by this renderer.\n" );
 104       compiled = GL_FALSE;
 105    }
 106
 107    init();
 108
 109    glutDisplayFunc( display );
 110    glutKeyboardFunc( keyboard );
 111    glutMainLoop();
 112
 113    return 0;
 114 }