aboutsummaryrefslogtreecommitdiff
path: root/nx-X11/extras/Mesa_6.4.2/progs/tests/api_speed.c
blob: aed65b35fe3e139c137c2dd2aaf2a946a4bcf9f5 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
/*
 * (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;
}