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progs/demos: report pixel rate in million pixels / sec

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This commit is contained in:
Brian Paul 2009-12-11 15:22:17 -07:00
parent f44f6473e6
commit 79e74cda73
1 changed files with 5 additions and 4 deletions
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9
progs/demos/readpix.c
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@ -219,7 +219,7 @@ Display( void )
GLint reads = 0;
GLint endTime;
GLint startTime = glutGet(GLUT_ELAPSED_TIME);
GLdouble seconds, pixelsPerSecond;
GLdouble seconds, mpixels, mpixelsPerSecond;
printf("Benchmarking...\n");
do {
glReadPixels(APosX, APosY, ImgWidth, ImgHeight,
@ -228,9 +228,10 @@ Display( void )
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);
mpixels = reads * (ImgWidth * ImgHeight / (1000.0 * 1000.0));
mpixelsPerSecond = mpixels / seconds;
printf("Result: %d reads in %f seconds = %f Mpixels/sec\n",
reads, seconds, mpixelsPerSecond);
Benchmark = GL_FALSE;
}
else {