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 to 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/glew.h>
  53 #include <GL/glut.h>
  54 #endif
  55
  56 static PFNGLBINDVERTEXARRAYAPPLEPROC bind_vertex_array = NULL;
  57 static PFNGLGENVERTEXARRAYSAPPLEPROC gen_vertex_arrays = NULL;
  58 static PFNGLDELETEVERTEXARRAYSAPPLEPROC delete_vertex_arrays = NULL;
  59 static PFNGLISVERTEXARRAYAPPLEPROC is_vertex_array = NULL;
  60
  61 static int Width = 400;
  62 static int Height = 200;
  63 static const GLfloat Near = 5.0, Far = 25.0;
  64
  65
  66 static void Display( void )
  67 {
  68 }
  69
  70
  71 static void Idle( void )
  72 {
  73 }
  74
  75
  76 static void Visible( int vis )
  77 {
  78    if ( vis == GLUT_VISIBLE ) {
  79       glutIdleFunc( Idle );
  80    }
  81    else {
  82       glutIdleFunc( NULL );
  83    }
  84 }
  85 static void Reshape( int width, int height )
  86 {
  87    GLfloat ar = (float) width / (float) height;
  88    Width = width;
  89    Height = height;
  90    glViewport( 0, 0, width, height );
  91    glMatrixMode( GL_PROJECTION );
  92    glLoadIdentity();
  93    glFrustum( -ar, ar, -1.0, 1.0, Near, Far );
  94 }
  95
  96
  97 static void Key( unsigned char key, int x, int y )
  98 {
  99    (void) x;
 100    (void) y;
 101    switch (key) {
 102       case 27:
 103          exit(0);
 104          break;
 105    }
 106    glutPostRedisplay();
 107 }
 108
 109
 110 static void Init( void )
 111 {
 112    const char * const ver_string = (const char * const)
 113        glGetString( GL_VERSION );
 114    GLuint obj;
 115    int pass = 1;
 116    void * ptr;
 117
 118
 119    printf("GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER));
 120    printf("GL_VERSION = %s\n\n", ver_string);
 121
 122    if ( !glutExtensionSupported("GL_APPLE_vertex_array_object") ) {
 123       printf("Sorry, this program requires GL_APPLE_vertex_array_object\n");
 124       exit(2);
 125    }
 126
 127    bind_vertex_array = (PFNGLBINDVERTEXARRAYAPPLEPROC) glutGetProcAddress( "glBindVertexArrayAPPLE" );
 128    gen_vertex_arrays = (PFNGLGENVERTEXARRAYSAPPLEPROC) glutGetProcAddress( "glGenVertexArraysAPPLE" );
 129    delete_vertex_arrays = (PFNGLDELETEVERTEXARRAYSAPPLEPROC) glutGetProcAddress( "glDeleteVertexArraysAPPLE" );
 130    is_vertex_array = (PFNGLISVERTEXARRAYAPPLEPROC) glutGetProcAddress( "glIsVertexArrayAPPLE" );
 131
 132
 133    (*gen_vertex_arrays)( 1, & obj );
 134    (*bind_vertex_array)( obj );
 135    glVertexPointer( 4, GL_FLOAT, sizeof(GLfloat) * 4, (void *) 0xDEADBEEF);
 136    glEnableClientState( GL_VERTEX_ARRAY );
 137
 138    glPushClientAttrib( GL_CLIENT_VERTEX_ARRAY_BIT );
 139
 140    glVertexPointer( 4, GL_FLOAT, sizeof(GLfloat) * 4, (void *) 0xBADDC0DE);
 141    glDisableClientState( GL_VERTEX_ARRAY );
 142
 143    glPopClientAttrib();
 144
 145    if ( ! glIsEnabled( GL_VERTEX_ARRAY ) ) {
 146       printf( "Array state is incorrectly disabled.\n" );
 147       pass = 0;
 148    }
 149
 150    glGetPointerv( GL_VERTEX_ARRAY_POINTER, & ptr );
 151    if ( ptr != (void *) 0xDEADBEEF ) {
 152       printf( "Array pointer is incorrectly set to 0x%p.\n", ptr );
 153       pass = 0;
 154    }
 155
 156    if ( ! pass ) {
 157       printf( "FAIL!\n" );
 158       exit(1);
 159    }
 160 }
 161
 162
 163 int main( int argc, char *argv[] )
 164 {
 165    glutInit( &argc, argv );
 166    glutInitWindowPosition( 0, 0 );
 167    glutInitWindowSize( Width, Height );
 168    glutInitDisplayMode( GLUT_RGB );
 169    glutCreateWindow( "GL_APPLE_vertex_array_object demo" );
 170    glewInit();
 171    glutReshapeFunc( Reshape );
 172    glutKeyboardFunc( Key );
 173    glutDisplayFunc( Display );
 174    glutVisibilityFunc( Visible );
 175
 176    Init();
 177
 178    return 0;
 179 }