Mesa (mesa_7_7_branch): progs/demos: report pixel rate in million pixels / sec
Brian Paul
brianp at kemper.freedesktop.org
Mon Dec 21 20:49:37 UTC 2009
Module: Mesa
Branch: mesa_7_7_branch
Commit: 79e74cda7347170f1015829ceafb0f5f18dd9236
URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=79e74cda7347170f1015829ceafb0f5f18dd9236
Author: Brian Paul <brianp at vmware.com>
Date: Fri Dec 11 15:22:17 2009 -0700
progs/demos: report pixel rate in million pixels / sec
---
progs/demos/readpix.c | 9 +++++----
1 files changed, 5 insertions(+), 4 deletions(-)
diff --git a/progs/demos/readpix.c b/progs/demos/readpix.c
index bbb3a68..182b01d 100644
--- a/progs/demos/readpix.c
+++ b/progs/demos/readpix.c
@@ -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 {
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