Attachment 15967 Details for Bug 15546 – GL program used to measure box performance

GL program used to measure box performance

gl-box-bench.c (text/plain), 4.16 KB, created by Owen Taylor on 2008-04-16 23:16:10 UTC

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Creator: Owen Taylor

Created: 2008-04-16 23:16:10 UTC

Size: 4.16 KB

patch

obsolete

>
>/*
> * Measure the speed of drawing many quads from the same texture.
> * Based on trispd.c:
> *
> * Brian Paul  February 15, 1997  This file is in the public domain.
> */
>
>#include <stdio.h>
>#include <stdlib.h>
>#include <math.h>
>#include <string.h>
>#include <GL/glut.h>
>
>static float MinPeriod = 2.0;   /* 2 seconds */
>static int Width;
>static int Height;
>static int Loops = 1000;
>static int Size = 10;
>static int NBoxes = 10;
>
>static void Idle( void )
>{
>    glutPostRedisplay();
>}
>
>
>static void Display( void )
>{
>    double t0, t1;
>    int boxCount;
>    double boxRate;
>    double pixRate;
>    float width = Width;
>    float height = Height;
>    int i, j;
>
>    glClearColor( 0.0, 0.0, 1.0, 1.0 );
>    glClear( GL_COLOR_BUFFER_BIT );
>
>    t0 = glutGet(GLUT_ELAPSED_TIME) * 0.001;
>
>    for (i=0; i<Loops; i++) {
>	for (j = 0; j < NBoxes; j++) {
>	    float x = j * (Size + 1);
>	    float y = 0;
>	    float u = x / width;
>	    float uSize = Size / width;
>	    float v = y / width;
>	    float vSize = Size / height;
>	    
>	    glBegin(GL_TRIANGLE_FAN);
>	    glTexCoord2f(u, v);
>	    glVertex2f(x, y);
>	    glTexCoord2f(u+uSize, v);
>	    glVertex2f(x+Size, y);
>	    glTexCoord2f(u+uSize, v+vSize);
>	    glVertex2f(x+Size, y+Size);
>	    glTexCoord2f(u, v+vSize);
>	    glVertex2f(x, y+Size);
>	    glEnd();
>	}
>    }
>    
>    glFinish();
>    t1 = glutGet(GLUT_ELAPSED_TIME) * 0.001;
>   
>    if (t1-t0 < MinPeriod) {
>	/* Next time draw more triangles to get longer elapsed time */
>	Loops *= 2;
>	return;
>    }
>
>    boxCount = NBoxes * Loops;
>    boxRate = boxCount / (t1-t0);
>    pixRate = boxRate * Size * Size;
>    printf("Rate: %d boxes in %gs = %g boxes/s %g pix/sec\n",
>	   boxCount, t1-t0, boxRate, pixRate);
>    
>    glutSwapBuffers();
>}
>
>
>static void Reshape( int width, int 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();
>}
>
>
>static void LoadTex()
>{
>    GLubyte *pixels;
>    int x, y;
>    pixels = (GLubyte *) malloc(4*Width*Height);
>    for (y = 0; y < Height; ++y)
>	for (x = 0; x < Width; ++x) {
>	    pixels[(y*Width+x)*4+0] = 255;
>	    pixels[(y*Width+x)*4+1] = 0;
>	    pixels[(y*Width+x)*4+2] = 0;
>	    pixels[(y*Width+x)*4+3] = 255;
>	}
>    glEnable(GL_TEXTURE_2D);
>    glTexImage2D(GL_TEXTURE_2D, 0, 4, Width, Height, 0, GL_RGBA, GL_UNSIGNED_BYTE, pixels);
>    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
>    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
>    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
>    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
>    glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
>}
>
>static int nextPower(int n) {
>    int result = 1;
>    while (result < n)
>	result *= 2;
>
>    return result;
>}
>
>static void Init( int argc, char *argv[] )
>{
>    int i;
>    for (i=1; i<argc; i++) {
>	if (strcmp(argv[i],"-size")==0) {
>	    Size = atoi(argv[i+1]);
>	    i++;
>	} else if (strcmp(argv[i],"-nboxes")==0) {
>	    NBoxes = atoi(argv[i+1]);
>	    i++;
>	}
>	else
>	    printf("Unknown option: %s\n", argv[i]);
>    }
>
>    printf("Size: %d pixels\n", Size);
>    printf("NBoxes: %d\n", NBoxes);
>
>    Width = nextPower((Size + 1) * NBoxes - 1);
>    Height = nextPower(Size);
>}
>
>
>static void Help( const char *program )
>{
>    printf("%s options:\n",   program);
>    printf("  -size pixels    specify size of boxes\n");
>    printf("  -nboxes nboxes  number of boxes\n");
>}
>
>
>int main( int argc, char *argv[] )
>{
>    printf("For options:  %s -help\n", argv[0]);
>    
>    glutInit( &argc, argv );
>    Init( argc, argv );
>
>    glutInitWindowSize( Width, Height );
>    glutInitWindowPosition( 0, 0 );
>
>    glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE );
>
>    glutCreateWindow( argv[0] );
>
>    if (argc==2 && strcmp(argv[1],"-help")==0) {
>	Help(argv[0]);
>	return 0;
>    }
>
>    LoadTex();
>
>    glutReshapeFunc( Reshape );
>    glutKeyboardFunc( Key );
>    glutDisplayFunc( Display );
>    glutIdleFunc( Idle );
>
>    glutMainLoop();
>    return 0;
>}

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Attachments on bug 15546: 15964 | 15965 | 15966 | 15967

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