diff options
| -rw-r--r-- | progs/demos/readpix.c | 85 |
1 files changed, 43 insertions, 42 deletions
diff --git a/progs/demos/readpix.c b/progs/demos/readpix.c index b6b067502d5..dd3a0af6fc3 100644 --- a/progs/demos/readpix.c +++ b/progs/demos/readpix.c @@ -1,4 +1,4 @@ -/* $Id: readpix.c,v 1.1 2000/03/01 16:23:14 brianp Exp $ */ +/* $Id: readpix.c,v 1.2 2000/03/23 19:47:25 brianp Exp $ */ /* * glReadPixels and glCopyPixels test @@ -8,6 +8,9 @@ /* * $Log: readpix.c,v $ + * Revision 1.2 2000/03/23 19:47:25 brianp + * added benchmarking + * * Revision 1.1 2000/03/01 16:23:14 brianp * test glDraw/Read/CopyPixels() * @@ -34,7 +37,7 @@ static int CPosX, CPosY; /* copypixels */ static GLboolean DrawFront = GL_FALSE; static GLboolean ScaleAndBias = GL_FALSE; - +static GLboolean Benchmark = GL_FALSE; static GLubyte *TempImage = NULL; @@ -85,7 +88,7 @@ Display( void ) glClear( GL_COLOR_BUFFER_BIT ); glRasterPos2i(5, ImgHeight+25); - PrintString("f = toggle front/back b = toggle scale/bias"); + PrintString("f = toggle front/back s = toggle scale/bias b = benchmark"); /* draw original image */ glRasterPos2i(APosX, 5); @@ -99,8 +102,28 @@ Display( void ) glRasterPos2i(BPosX, 5); PrintString("Read/DrawPixels"); SetupPixelTransfer(ScaleAndBias); - glReadPixels(APosX, APosY, ImgWidth, ImgHeight, - ImgFormat, GL_UNSIGNED_BYTE, TempImage); + if (Benchmark) { + GLint reads = 0; + GLint endTime; + GLint startTime = glutGet(GLUT_ELAPSED_TIME); + GLdouble seconds, pixelsPerSecond; + printf("Benchmarking...\n"); + do { + glReadPixels(APosX, APosY, ImgWidth, ImgHeight, + ImgFormat, GL_UNSIGNED_BYTE, TempImage); + reads++; + endTime = glutGet(GLUT_ELAPSED_TIME); + } while (endTime - startTime < 4000); /* 4 seconds */ + seconds = (double) (endTime - startTime) / 1000.0; + pixelsPerSecond = reads * ImgWidth * ImgHeight / seconds; + printf("Result: %d reads in %f seconds = %f pixels/sec\n", + reads, seconds, pixelsPerSecond); + Benchmark = GL_FALSE; + } + else { + glReadPixels(APosX, APosY, ImgWidth, ImgHeight, + ImgFormat, GL_UNSIGNED_BYTE, TempImage); + } glRasterPos2i(BPosX, BPosY); glDisable(GL_DITHER); SetupPixelTransfer(GL_FALSE); @@ -119,7 +142,8 @@ Display( void ) } -static void Reshape( int width, int height ) +static void +Reshape( int width, int height ) { glViewport( 0, 0, width, height ); glMatrixMode( GL_PROJECTION ); @@ -130,20 +154,28 @@ static void Reshape( int width, int height ) } -static void Key( unsigned char key, int x, int y ) +static void +Key( unsigned char key, int x, int y ) { (void) x; (void) y; switch (key) { case 'b': + Benchmark = GL_TRUE; + break; + case 's': ScaleAndBias = !ScaleAndBias; break; case 'f': DrawFront = !DrawFront; - if (DrawFront) + if (DrawFront) { glDrawBuffer(GL_FRONT); - else + glReadBuffer(GL_FRONT); + } + else { glDrawBuffer(GL_BACK); + glReadBuffer(GL_BACK); + } printf("glDrawBuffer(%s)\n", DrawFront ? "GL_FRONT" : "GL_BACK"); break; case 27: @@ -154,30 +186,6 @@ static void Key( unsigned char key, int x, int y ) } -static void SpecialKey( int key, int x, int y ) -{ - (void) x; - (void) y; -#if 0 - switch (key) { - case GLUT_KEY_UP: - Ypos += 1; - break; - case GLUT_KEY_DOWN: - Ypos -= 1; - break; - case GLUT_KEY_LEFT: - Xpos -= 1; - break; - case GLUT_KEY_RIGHT: - Xpos += 1; - break; - } -#endif - glutPostRedisplay(); -} - - static void Init( GLboolean ciMode ) { @@ -222,32 +230,25 @@ Init( GLboolean ciMode ) } -int main( int argc, char *argv[] ) +int +main( int argc, char *argv[] ) { GLboolean ciMode = GL_FALSE; - if (argc > 1 && strcmp(argv[1], "-ci")==0) { ciMode = GL_TRUE; } - glutInit( &argc, argv ); glutInitWindowPosition( 0, 0 ); glutInitWindowSize( 750, 250 ); - if (ciMode) glutInitDisplayMode( GLUT_INDEX | GLUT_DOUBLE ); else glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE ); - glutCreateWindow(argv[0]); - Init(ciMode); - glutReshapeFunc( Reshape ); glutKeyboardFunc( Key ); - glutSpecialFunc( SpecialKey ); glutDisplayFunc( Display ); - glutMainLoop(); return 0; } |