147 lines
3.7 KiB
C
147 lines
3.7 KiB
C
/*
|
|
* (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;
|
|
}
|