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/*
* (C) Copyright IBM Corporation 2006
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* on the rights to use, copy, modify, merge, publish, distribute, sub
* license, and/or sell copies of the Software, and to permit persons to whom
* the Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
* IBM AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
/**
* \file vao-01.c
*
* Simple test of APPLE_vertex_array_object functionality. This test creates
* a VAO, pushed it (via \c glPushClientAttrib), modifies the VAO, then pops
* it (via \c glPopClientAttrib). After popping, the state of the VAO is
* examined.
*
* According the the APPLE_vertex_array_object spec, the contents of the VAO
* should be restored to the values that they had when pushed.
*
* \author Ian Romanick <idr@us.ibm.com>
*/
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#ifdef __darwin__
#include <GLUT/glut.h>
typedef void (* PFNGLBINDVERTEXARRAYAPPLEPROC) (GLuint array);
typedef void (* PFNGLDELETEVERTEXARRAYSAPPLEPROC) (GLsizei n, const GLuint *arrays);
typedef void (* PFNGLGENVERTEXARRAYSAPPLEPROC) (GLsizei n, GLuint *arrays);
typedef GLboolean (* PFNGLISVERTEXARRAYAPPLEPROC) (GLuint array);
#else
#include <GL/glut.h>
#endif
static PFNGLBINDVERTEXARRAYAPPLEPROC bind_vertex_array = NULL;
static PFNGLGENVERTEXARRAYSAPPLEPROC gen_vertex_arrays = NULL;
static PFNGLDELETEVERTEXARRAYSAPPLEPROC delete_vertex_arrays = NULL;
static PFNGLISVERTEXARRAYAPPLEPROC is_vertex_array = NULL;
static int Width = 400;
static int Height = 200;
static const GLfloat Near = 5.0, Far = 25.0;
static void Display( void )
{
}
static void Idle( void )
{
}
static void Visible( int vis )
{
if ( vis == GLUT_VISIBLE ) {
glutIdleFunc( Idle );
}
else {
glutIdleFunc( NULL );
}
}
static void Reshape( int width, int height )
{
GLfloat ar = (float) width / (float) height;
Width = width;
Height = height;
glViewport( 0, 0, width, height );
glMatrixMode( GL_PROJECTION );
glLoadIdentity();
glFrustum( -ar, ar, -1.0, 1.0, Near, Far );
}
static void Key( unsigned char key, int x, int y )
{
(void) x;
(void) y;
switch (key) {
case 27:
exit(0);
break;
}
glutPostRedisplay();
}
static void Init( void )
{
const char * const ver_string = (const char * const)
glGetString( GL_VERSION );
GLuint obj;
int pass = 1;
void * ptr;
printf("GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER));
printf("GL_VERSION = %s\n\n", ver_string);
if ( !glutExtensionSupported("GL_APPLE_vertex_array_object") ) {
printf("Sorry, this program requires GL_APPLE_vertex_array_object\n");
exit(2);
}
bind_vertex_array = glutGetProcAddress( "glBindVertexArrayAPPLE" );
gen_vertex_arrays = glutGetProcAddress( "glGenVertexArraysAPPLE" );
delete_vertex_arrays = glutGetProcAddress( "glDeleteVertexArraysAPPLE" );
is_vertex_array = glutGetProcAddress( "glIsVertexArrayAPPLE" );
(*gen_vertex_arrays)( 1, & obj );
(*bind_vertex_array)( obj );
glVertexPointer( 4, GL_FLOAT, sizeof(GLfloat) * 4, (void *) 0xDEADBEEF);
glEnableClientState( GL_VERTEX_ARRAY );
glPushClientAttrib( GL_CLIENT_VERTEX_ARRAY_BIT );
glVertexPointer( 4, GL_FLOAT, sizeof(GLfloat) * 4, (void *) 0xBADDC0DE);
glDisableClientState( GL_VERTEX_ARRAY );
glPopClientAttrib();
if ( ! glIsEnabled( GL_VERTEX_ARRAY ) ) {
printf( "Array state is incorrectly disabled.\n" );
pass = 0;
}
glGetPointerv( GL_VERTEX_ARRAY_POINTER, & ptr );
if ( ptr != (void *) 0xDEADBEEF ) {
printf( "Array pointer is incorrectly set to 0x%p.\n", ptr );
pass = 0;
}
if ( ! pass ) {
printf( "FAIL!\n" );
exit(1);
}
}
int main( int argc, char *argv[] )
{
glutInit( &argc, argv );
glutInitWindowPosition( 0, 0 );
glutInitWindowSize( Width, Height );
glutInitDisplayMode( GLUT_RGB );
glutCreateWindow( "GL_APPLE_vertex_array_object demo" );
glutReshapeFunc( Reshape );
glutKeyboardFunc( Key );
glutDisplayFunc( Display );
glutVisibilityFunc( Visible );
Init();
return 0;
}
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