/* * (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/glew.h> #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" ); glewInit(); glutReshapeFunc( Reshape ); glutKeyboardFunc( Key ); glutDisplayFunc( Display ); glutVisibilityFunc( Visible ); Init(); return 0; }