summaryrefslogtreecommitdiff
path: root/progs
diff options
context:
space:
mode:
authorBrian Paul <brian.paul@tungstengraphics.com>2000-03-23 19:47:25 +0000
committerBrian Paul <brian.paul@tungstengraphics.com>2000-03-23 19:47:25 +0000
commit4f6d60e9cf73441b0779197dd750f8ab923b6e9f (patch)
treeab5541945e2ba5ade79bd9f9c25eccd4a6407e46 /progs
parent9891bf086de8f0840b45521a008c4a9b00ca6ece (diff)
added benchmarking
Diffstat (limited to 'progs')
-rw-r--r--progs/demos/readpix.c85
1 files changed, 43 insertions, 42 deletions
diff --git a/progs/demos/readpix.c b/progs/demos/readpix.c
index b6b067502d..dd3a0af6fc 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;
}