diff options
Diffstat (limited to 'progs/demos/clearspd.c')
| -rw-r--r-- | progs/demos/clearspd.c | 217 |
1 files changed, 0 insertions, 217 deletions
diff --git a/progs/demos/clearspd.c b/progs/demos/clearspd.c deleted file mode 100644 index c40f118a64..0000000000 --- a/progs/demos/clearspd.c +++ /dev/null @@ -1,217 +0,0 @@ - -/* - * Simple GLUT program to measure glClear() and glutSwapBuffers() speed. - * Brian Paul February 15, 1997 This file in 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 ColorMode = GLUT_RGB; -static int Width = 400.0; -static int Height = 400.0; -static int Loops = 100; -static float ClearColor = 0.0; -static GLbitfield BufferMask = GL_COLOR_BUFFER_BIT; -static GLboolean SwapFlag = GL_FALSE; - - - -static void Idle( void ) -{ - glutPostRedisplay(); -} - - -static void Display( void ) -{ - double t0, t1; - double clearRate; - double pixelRate; - int i; - - glClearColor( ClearColor, ClearColor, ClearColor, 0.0 ); - ClearColor += 0.1; - if (ClearColor>1.0) - ClearColor = 0.0; - - if (SwapFlag) { - t0 = glutGet(GLUT_ELAPSED_TIME) * 0.001; - for (i=0;i<Loops;i++) { - glClear( BufferMask ); - glutSwapBuffers(); - } - glFinish(); - t1 = glutGet(GLUT_ELAPSED_TIME) * 0.001; - } - else { - t0 = glutGet(GLUT_ELAPSED_TIME) * 0.001; - for (i=0;i<Loops;i++) { - glClear( BufferMask ); - } - glFinish(); - t1 = glutGet(GLUT_ELAPSED_TIME) * 0.001; - glutSwapBuffers(); - } - - /* NOTE: If clearspd doesn't map it's window immediately on - * starting, swaps will be istantaneous, so this will send Loops - * towards infinity. When a window is finally mapped, it may be - * minutes before the first call to glutSwapBuffers, making it look - * like there's a driver bug. - */ - if (t1-t0 < MinPeriod) { - /* Next time do more clears to get longer elapsed time */ - Loops *= 2; - return; - } - - clearRate = Loops / (t1-t0); - pixelRate = clearRate * Width * Height; - if (SwapFlag) { - printf("Rate: %d clears+swaps in %gs = %g clears+swaps/s %g pixels/s\n", - Loops, t1-t0, clearRate, pixelRate ); - } - else { - printf("Rate: %d clears in %gs = %g clears/s %g pixels/s\n", - Loops, t1-t0, clearRate, pixelRate); - } -} - - -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(); -} - - -static void Init( int argc, char *argv[] ) -{ - int i; - for (i=1; i<argc; i++) { - if (strcmp(argv[i],"+rgb")==0) - ColorMode = GLUT_RGB; - else if (strcmp(argv[i],"+ci")==0) - ColorMode = GLUT_INDEX; - else if (strcmp(argv[i],"-color")==0) - BufferMask = 0; - else if (strcmp(argv[i],"+depth")==0) - BufferMask |= GL_DEPTH_BUFFER_BIT; - else if (strcmp(argv[i],"+alpha")==0) - ColorMode = GLUT_RGB | GLUT_ALPHA; - else if (strcmp(argv[i],"+stencil")==0) - BufferMask |= GL_STENCIL_BUFFER_BIT; - else if (strcmp(argv[i],"+accum")==0) - BufferMask |= GL_ACCUM_BUFFER_BIT; - else if (strcmp(argv[i],"-width")==0) { - Width = atoi(argv[i+1]); - i++; - } - else if (strcmp(argv[i],"-height")==0) { - Height = atoi(argv[i+1]); - i++; - } - else if (strcmp(argv[i],"+swap")==0) { - SwapFlag = GL_TRUE; - } - else if (strcmp(argv[i],"-swap")==0) { - SwapFlag = GL_FALSE; - } - else - printf("Unknown option: %s\n", argv[i]); - } - - if (ColorMode & GLUT_ALPHA) - printf("Mode: RGB + Alpha\n"); - else if (ColorMode==GLUT_RGB) - printf("Mode: RGB\n"); - else - printf("Mode: Color Index\n"); - printf("SwapBuffers: %s\n", SwapFlag ? "yes" : "no" ); - printf("Size: %d x %d\n", Width, Height); - printf("Buffers: "); - if (BufferMask & GL_COLOR_BUFFER_BIT) printf("color "); - if (BufferMask & GL_DEPTH_BUFFER_BIT) printf("depth "); - if (BufferMask & GL_STENCIL_BUFFER_BIT) printf("stencil "); - if (BufferMask & GL_ACCUM_BUFFER_BIT) printf("accum "); - printf("\n"); -} - - -static void Help( const char *program ) -{ - printf("%s options:\n", program); - printf(" +rgb RGB mode\n"); - printf(" +ci color index mode\n"); - printf(" -color don't clear color buffer\n"); - printf(" +alpha clear alpha buffer\n"); - printf(" +depth clear depth buffer\n"); - printf(" +stencil clear stencil buffer\n"); - printf(" +accum clear accum buffer\n"); - printf(" +swap also do SwapBuffers\n"); - printf(" -swap don't do SwapBuffers\n"); -} - - -int main( int argc, char *argv[] ) -{ - GLint mode; - - printf("For options: %s -help\n", argv[0]); - - Init( argc, argv ); - - glutInitWindowSize( (int) Width, (int) Height ); - glutInit( &argc, argv ); - - mode = ColorMode | GLUT_DOUBLE; - if (BufferMask & GL_STENCIL_BUFFER_BIT) - mode |= GLUT_STENCIL; - if (BufferMask & GL_ACCUM_BUFFER_BIT) - mode |= GLUT_ACCUM; - if (BufferMask & GL_DEPTH_BUFFER_BIT) - mode |= GLUT_DEPTH; - - glutInitDisplayMode(mode); - - glutCreateWindow( argv[0] ); - - if (argc==2 && strcmp(argv[1],"-help")==0) { - Help(argv[0]); - return 0; - } - - glutReshapeFunc( Reshape ); - glutKeyboardFunc( Key ); - glutDisplayFunc( Display ); - glutIdleFunc( Idle ); - - glutMainLoop(); - return 0; -} |