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/*
* (C) Copyright IBM Corporation 2002
* 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
* VA LINUX SYSTEM, 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 api_speed.c
* Simple test to measure the overhead of making GL calls.
*
* The main purpose of this test is to measure the difference in calling
* overhead of different dispatch methods. Since it uses asm/timex.h to
* access the Pentium's cycle counters, it will probably only compile on
* Linux (though most architectures have a get_cycles function in timex.h).
* That is why it isn't in the default Makefile.
*
* \author Ian Romanick <idr@us.ibm.com>
*/
#include <stdio.h>
#include <stdlib.h>
#define GL_GLEXT_PROTOTYPES
#include <GL/gl.h>
#include <GL/glext.h>
#include <GL/glut.h>
#define inline __inline__
#include <asm/timex.h>
static float Width = 400;
static float Height = 400;
static unsigned count = 1000000;
static void Idle( void )
{
glutPostRedisplay();
}
#define DO_FUNC(f,p) \
do { \
t0 = get_cycles(); \
for ( i = 0 ; i < count ; i++ ) { \
f p ; \
} \
t1 = get_cycles(); \
printf("%u calls to % 20s required %llu cycles.\n", count, # f, t1 - t0); \
} while( 0 )
/**
* Main display function. This is the place to add more API calls.
*/
static void Display( void )
{
int i;
const float v[3] = { 1.0, 0.0, 0.0 };
cycles_t t0;
cycles_t t1;
glBegin(GL_TRIANGLE_STRIP);
DO_FUNC( glColor3fv, (v) );
DO_FUNC( glNormal3fv, (v) );
DO_FUNC( glTexCoord2fv, (v) );
DO_FUNC( glTexCoord3fv, (v) );
DO_FUNC( glMultiTexCoord2fv, (GL_TEXTURE0, v) );
DO_FUNC( glMultiTexCoord2f, (GL_TEXTURE0, 0.0, 0.0) );
DO_FUNC( glFogCoordfvEXT, (v) );
DO_FUNC( glFogCoordfEXT, (0.5) );
glEnd();
exit(0);
}
static void Reshape( int width, int height )
{
Width = width;
Height = height;
glViewport( 0, 0, width, height );
glMatrixMode( GL_PROJECTION );
glLoadIdentity();
glOrtho(0.0, width, 0.0, height, -1.0, 1.0);
glMatrixMode( GL_MODELVIEW );
glLoadIdentity();
}
static void Key( unsigned char key, int x, int y )
{
(void) x;
(void) y;
switch (key) {
case 27:
exit(0);
break;
}
glutPostRedisplay();
}
int main( int argc, char *argv[] )
{
glutInit( &argc, argv );
glutInitWindowSize( (int) Width, (int) Height );
glutInitWindowPosition( 0, 0 );
glutInitDisplayMode( GLUT_RGB );
glutCreateWindow( argv[0] );
if ( argc > 1 ) {
count = strtoul( argv[1], NULL, 0 );
if ( count == 0 ) {
fprintf( stderr, "Usage: %s [iterations]\n", argv[0] );
exit(1);
}
}
glutReshapeFunc( Reshape );
glutKeyboardFunc( Key );
glutDisplayFunc( Display );
glutIdleFunc( Idle );
glutMainLoop();
return 0;
}
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