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mesa/progs/demos/vao_demo.c

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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.
*/
#include <assert.h>
#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, const 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 int Win = 0;
static const GLfloat Near = 5.0, Far = 25.0;
static GLfloat angle = 0.0;
static GLuint cube_array_obj = 0;
static GLuint oct_array_obj = 0;
static const GLfloat cube_vert[] = {
-0.5, -0.5, -0.5, 1.0,
0.5, -0.5, -0.5, 1.0,
0.5, 0.5, -0.5, 1.0,
-0.5, 0.5, -0.5, 1.0,
-0.5, -0.5, 0.5, 1.0,
0.5, -0.5, 0.5, 1.0,
0.5, 0.5, 0.5, 1.0,
-0.5, 0.5, 0.5, 1.0,
-0.5, 0.5, -0.5, 1.0,
0.5, 0.5, -0.5, 1.0,
0.5, 0.5, 0.5, 1.0,
-0.5, 0.5, 0.5, 1.0,
-0.5, -0.5, -0.5, 1.0,
0.5, -0.5, -0.5, 1.0,
0.5, -0.5, 0.5, 1.0,
-0.5, -0.5, 0.5, 1.0,
0.5, -0.5, -0.5, 1.0,
0.5, -0.5, 0.5, 1.0,
0.5, 0.5, 0.5, 1.0,
0.5, 0.5, -0.5, 1.0,
-0.5, -0.5, -0.5, 1.0,
-0.5, -0.5, 0.5, 1.0,
-0.5, 0.5, 0.5, 1.0,
-0.5, 0.5, -0.5, 1.0,
};
static const GLfloat cube_color[] = {
1.0, 0.0, 0.0, 1.0,
1.0, 0.0, 0.0, 1.0,
1.0, 0.0, 0.0, 1.0,
1.0, 0.0, 0.0, 1.0,
0.0, 1.0, 0.0, 1.0,
0.0, 1.0, 0.0, 1.0,
0.0, 1.0, 0.0, 1.0,
0.0, 1.0, 0.0, 1.0,
0.0, 0.0, 1.0, 1.0,
0.0, 0.0, 1.0, 1.0,
0.0, 0.0, 1.0, 1.0,
0.0, 0.0, 1.0, 1.0,
1.0, 0.0, 1.0, 1.0,
1.0, 0.0, 1.0, 1.0,
1.0, 0.0, 1.0, 1.0,
1.0, 0.0, 1.0, 1.0,
1.0, 1.0, 1.0, 1.0,
1.0, 1.0, 1.0, 1.0,
1.0, 1.0, 1.0, 1.0,
1.0, 1.0, 1.0, 1.0,
0.5, 0.5, 0.5, 1.0,
0.5, 0.5, 0.5, 1.0,
0.5, 0.5, 0.5, 1.0,
0.5, 0.5, 0.5, 1.0,
};
static const GLfloat oct_vert[] = {
0.0, 0.0, 0.7071, 1.0,
0.5, 0.5, 0.0, 1.0,
-0.5, 0.5, 0.0, 1.0,
0.0, 0.0, 0.7071, 1.0,
0.5, -0.5, 0.0, 1.0,
-0.5, -0.5, 0.0, 1.0,
0.0, 0.0, 0.7071, 1.0,
-0.5, -0.5, 0.0, 1.0,
-0.5, 0.5, 0.0, 1.0,
0.0, 0.0, 0.7071, 1.0,
0.5, 0.5, 0.0, 1.0,
0.5, -0.5, 0.0, 1.0,
0.0, 0.0, -0.7071, 1.0,
0.5, 0.5, 0.0, 1.0,
-0.5, 0.5, 0.0, 1.0,
0.0, 0.0, -0.7071, 1.0,
0.5, -0.5, 0.0, 1.0,
-0.5, -0.5, 0.0, 1.0,
0.0, 0.0, -0.7071, 1.0,
-0.5, -0.5, 0.0, 1.0,
-0.5, 0.5, 0.0, 1.0,
0.0, 0.0, -0.7071, 1.0,
0.5, 0.5, 0.0, 1.0,
0.5, -0.5, 0.0, 1.0,
};
static const GLfloat oct_color[] = {
1.0, 0.64, 0.0, 1.0,
1.0, 0.64, 0.0, 1.0,
1.0, 0.64, 0.0, 1.0,
0.8, 0.51, 0.0, 1.0,
0.8, 0.51, 0.0, 1.0,
0.8, 0.51, 0.0, 1.0,
0.5, 0.32, 0.0, 1.0,
0.5, 0.32, 0.0, 1.0,
0.5, 0.32, 0.0, 1.0,
0.2, 0.13, 0.0, 1.0,
0.2, 0.13, 0.0, 1.0,
0.2, 0.13, 0.0, 1.0,
0.2, 0.13, 0.0, 1.0,
0.2, 0.13, 0.0, 1.0,
0.2, 0.13, 0.0, 1.0,
0.5, 0.32, 0.0, 1.0,
0.5, 0.32, 0.0, 1.0,
0.5, 0.32, 0.0, 1.0,
0.8, 0.51, 0.0, 1.0,
0.8, 0.51, 0.0, 1.0,
0.8, 0.51, 0.0, 1.0,
1.0, 0.64, 0.0, 1.0,
1.0, 0.64, 0.0, 1.0,
1.0, 0.64, 0.0, 1.0,
};
static void Display( void )
{
glClearColor(0.1, 0.1, 0.4, 0);
glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
glMatrixMode( GL_MODELVIEW );
glLoadIdentity();
glTranslatef( 0.0, 0.0, -15.0 );
glRotatef( angle, 0.0 * angle , 0.0 * angle, 1.0 );
(*bind_vertex_array)( cube_array_obj );
glPushMatrix();
glTranslatef(-1.5, 0, 0);
glRotatef( angle, 0.3 * angle , 0.8 * angle, 1.0 );
glDrawArrays( GL_QUADS, 0, 4 * 6 );
glPopMatrix();
(*bind_vertex_array)( oct_array_obj );
glPushMatrix();
glTranslatef(1.5, 0, 0);
glRotatef( angle, 0.3 * angle , 0.8 * angle, 1.0 );
glDrawArrays( GL_TRIANGLES, 0, 3 * 8 );
glPopMatrix();
glutSwapBuffers();
}
static void Idle( void )
{
static double t0 = -1.;
double dt, t = glutGet(GLUT_ELAPSED_TIME) / 1000.0;
if (t0 < 0.0)
t0 = t;
dt = t - t0;
t0 = t;
angle += 70.0 * dt; /* 70 degrees per second */
angle = fmod(angle, 360.0); /* prevents eventual overflow */
glutPostRedisplay();
}
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:
glutDestroyWindow(Win);
exit(0);
break;
}
glutPostRedisplay();
}
static void Init( void )
{
const char * const ver_string = (const char * const)
glGetString( GL_VERSION );
printf("GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER));
printf("GL_VERSION = %s\n", ver_string);
if ( !glutExtensionSupported("GL_APPLE_vertex_array_object") ) {
printf("Sorry, this program requires GL_APPLE_vertex_array_object\n");
exit(1);
}
bind_vertex_array = (PFNGLBINDVERTEXARRAYAPPLEPROC) glutGetProcAddress( "glBindVertexArrayAPPLE" );
gen_vertex_arrays = (PFNGLGENVERTEXARRAYSAPPLEPROC) glutGetProcAddress( "glGenVertexArraysAPPLE" );
delete_vertex_arrays = (PFNGLDELETEVERTEXARRAYSAPPLEPROC) glutGetProcAddress( "glDeleteVertexArraysAPPLE" );
is_vertex_array = (PFNGLISVERTEXARRAYAPPLEPROC) glutGetProcAddress( "glIsVertexArrayAPPLE" );
assert(bind_vertex_array);
assert(gen_vertex_arrays);
assert(delete_vertex_arrays);
assert(is_vertex_array);
glEnable( GL_DEPTH_TEST );
(*gen_vertex_arrays)( 1, & cube_array_obj );
(*bind_vertex_array)( cube_array_obj );
glVertexPointer( 4, GL_FLOAT, sizeof(GLfloat) * 4, cube_vert);
glColorPointer( 4, GL_FLOAT, sizeof(GLfloat) * 4, cube_color);
glEnableClientState( GL_VERTEX_ARRAY );
glEnableClientState( GL_COLOR_ARRAY );
(*gen_vertex_arrays)( 1, & oct_array_obj );
(*bind_vertex_array)( oct_array_obj );
glVertexPointer( 4, GL_FLOAT, sizeof(GLfloat) * 4, oct_vert);
glColorPointer( 4, GL_FLOAT, sizeof(GLfloat) * 4, oct_color);
glEnableClientState( GL_VERTEX_ARRAY );
glEnableClientState( GL_COLOR_ARRAY );
(*bind_vertex_array)( 0 );
glVertexPointer( 4, GL_FLOAT, sizeof(GLfloat) * 4, (void *) 0xDEADBEEF );
glColorPointer( 4, GL_FLOAT, sizeof(GLfloat) * 4, (void *) 0xBADDC0DE );
}
int main( int argc, char *argv[] )
{
glutInit( &argc, argv );
glutInitWindowPosition( 0, 0 );
glutInitWindowSize( Width, Height );
glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH );
Win = glutCreateWindow( "GL_APPLE_vertex_array_object demo" );
glutReshapeFunc( Reshape );
glutKeyboardFunc( Key );
glutDisplayFunc( Display );
glutVisibilityFunc( Visible );
Init();
glutMainLoop();
return 0;
}
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