progs/tests/vao-01.c

   1 /*
   2  * (C) Copyright IBM Corporation 2006
   3  * All Rights Reserved.
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the "Software"),
   7  * to deal in the Software without restriction, including without limitation
   8  * on the rights to use, copy, modify, merge, publish, distribute, sub
   9  * license, and/or sell copies of the Software, and to permit persons to whom
  10  * the Software is furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice (including the next
  13  * paragraph) shall be included in all copies or substantial portions of the
  14  * Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.  IN NO EVENT SHALL
  19  * IBM AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  21  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  22  * DEALINGS IN THE SOFTWARE.
  23  */
  24
  25 /**
  26  * \file vao-01.c
  27  *
  28  * Simple test of APPLE_vertex_array_object functionality.  This test creates
  29  * a VAO, pushed it (via \c glPushClientAttrib), modifies the VAO, then pops
  30  * it (via \c glPopClientAttrib).  After popping, the state of the VAO is
  31  * examined.
  32  *
  33  * According the the APPLE_vertex_array_object spec, the contents of the VAO
  34  * should be restored to the values that they had when pushed.
  35  *
  36  * \author Ian Romanick <idr@us.ibm.com>
  37  */
  38
  39 #include <stdio.h>
  40 #include <stdlib.h>
  41 #include <math.h>
  42
  43 #ifdef __darwin__
  44 #include <GLUT/glut.h>
  45
  46 typedef void (* PFNGLBINDVERTEXARRAYAPPLEPROC) (GLuint array);
  47 typedef void (* PFNGLDELETEVERTEXARRAYSAPPLEPROC) (GLsizei n, const GLuint *arrays);
  48 typedef void (* PFNGLGENVERTEXARRAYSAPPLEPROC) (GLsizei n, GLuint *arrays);
  49 typedef GLboolean (* PFNGLISVERTEXARRAYAPPLEPROC) (GLuint array);
  50
  51 #else
  52 #include <GL/glut.h>
  53 #endif
  54
  55 static PFNGLBINDVERTEXARRAYAPPLEPROC bind_vertex_array = NULL;
  56 static PFNGLGENVERTEXARRAYSAPPLEPROC gen_vertex_arrays = NULL;
  57 static PFNGLDELETEVERTEXARRAYSAPPLEPROC delete_vertex_arrays = NULL;
  58 static PFNGLISVERTEXARRAYAPPLEPROC is_vertex_array = NULL;
  59
  60 static int Width = 400;
  61 static int Height = 200;
  62 static const GLfloat Near = 5.0, Far = 25.0;
  63
  64
  65 static void Display( void )
  66 {
  67 }
  68
  69
  70 static void Idle( void )
  71 {
  72 }
  73
  74
  75 static void Visible( int vis )
  76 {
  77    if ( vis == GLUT_VISIBLE ) {
  78       glutIdleFunc( Idle );
  79    }
  80    else {
  81       glutIdleFunc( NULL );
  82    }
  83 }
  84 static void Reshape( int width, int height )
  85 {
  86    GLfloat ar = (float) width / (float) height;
  87    Width = width;
  88    Height = height;
  89    glViewport( 0, 0, width, height );
  90    glMatrixMode( GL_PROJECTION );
  91    glLoadIdentity();
  92    glFrustum( -ar, ar, -1.0, 1.0, Near, Far );
  93 }
  94
  95
  96 static void Key( unsigned char key, int x, int y )
  97 {
  98    (void) x;
  99    (void) y;
 100    switch (key) {
 101       case 27:
 102          exit(0);
 103          break;
 104    }
 105    glutPostRedisplay();
 106 }
 107
 108
 109 static void Init( void )
 110 {
 111    const char * const ver_string = (const char * const)
 112        glGetString( GL_VERSION );
 113    GLuint obj;
 114    int pass = 1;
 115    void * ptr;
 116
 117
 118    printf("GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER));
 119    printf("GL_VERSION = %s\n\n", ver_string);
 120
 121    if ( !glutExtensionSupported("GL_APPLE_vertex_array_object") ) {
 122       printf("Sorry, this program requires GL_APPLE_vertex_array_object\n");
 123       exit(2);
 124    }
 125
 126    bind_vertex_array = glutGetProcAddress( "glBindVertexArrayAPPLE" );
 127    gen_vertex_arrays = glutGetProcAddress( "glGenVertexArraysAPPLE" );
 128    delete_vertex_arrays = glutGetProcAddress( "glDeleteVertexArraysAPPLE" );
 129    is_vertex_array = glutGetProcAddress( "glIsVertexArrayAPPLE" );
 130
 131
 132    (*gen_vertex_arrays)( 1, & obj );
 133    (*bind_vertex_array)( obj );
 134    glVertexPointer( 4, GL_FLOAT, sizeof(GLfloat) * 4, (void *) 0xDEADBEEF);
 135    glEnableClientState( GL_VERTEX_ARRAY );
 136
 137    glPushClientAttrib( GL_CLIENT_VERTEX_ARRAY_BIT );
 138
 139    glVertexPointer( 4, GL_FLOAT, sizeof(GLfloat) * 4, (void *) 0xBADDC0DE);
 140    glDisableClientState( GL_VERTEX_ARRAY );
 141
 142    glPopClientAttrib();
 143
 144    if ( ! glIsEnabled( GL_VERTEX_ARRAY ) ) {
 145       printf( "Array state is incorrectly disabled.\n" );
 146       pass = 0;
 147    }
 148
 149    glGetPointerv( GL_VERTEX_ARRAY_POINTER, & ptr );
 150    if ( ptr != (void *) 0xDEADBEEF ) {
 151       printf( "Array pointer is incorrectly set to 0x%p.\n", ptr );
 152       pass = 0;
 153    }
 154
 155    if ( ! pass ) {
 156       printf( "FAIL!\n" );
 157       exit(1);
 158    }
 159 }
 160
 161
 162 int main( int argc, char *argv[] )
 163 {
 164    glutInit( &argc, argv );
 165    glutInitWindowPosition( 0, 0 );
 166    glutInitWindowSize( Width, Height );
 167    glutInitDisplayMode( GLUT_RGB );
 168    glutCreateWindow( "GL_APPLE_vertex_array_object demo" );
 169    glutReshapeFunc( Reshape );
 170    glutKeyboardFunc( Key );
 171    glutDisplayFunc( Display );
 172    glutVisibilityFunc( Visible );
 173
 174    Init();
 175
 176    return 0;
 177 }