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-rw-r--r--progs/demos/osdemo.c45
1 files changed, 37 insertions, 8 deletions
diff --git a/progs/demos/osdemo.c b/progs/demos/osdemo.c
index 73fb367fec..1827e867d6 100644
--- a/progs/demos/osdemo.c
+++ b/progs/demos/osdemo.c
@@ -1,4 +1,4 @@
-/* $Id: osdemo.c,v 1.7 2001/09/24 15:29:27 kschultz Exp $ */
+/* $Id: osdemo.c,v 1.8 2002/04/05 17:40:20 kschultz Exp $ */
/*
* Demo of off-screen Mesa rendering
@@ -14,6 +14,11 @@
*
* PPM output provided by Joerg Schmalzl.
* ASCII PPM output added by Brian Paul.
+ *
+ * Usage: osdemo [-perf] [filename]
+ *
+ * -perf: Redraws the image 1000 times, displaying the FPS every 5 secs.
+ * filename: file to store the TGA or PPM output
*/
@@ -29,7 +34,9 @@
#define WIDTH 400
#define HEIGHT 400
-
+static GLint T0 = 0;
+static GLint Frames = 0;
+static int perf = 0;
static void render_image( void )
{
@@ -76,7 +83,7 @@ static void render_image( void )
glPopMatrix();
#ifdef GL_HP_occlusion_test
- {
+ if (perf == 0) {
GLboolean bRet;
glDepthMask(GL_FALSE);
glColorMask(GL_FALSE,GL_FALSE,GL_FALSE,GL_FALSE);
@@ -105,7 +112,7 @@ static void render_image( void )
glPopMatrix();
#ifdef GL_HP_occlusion_test
- {
+ if (perf == 0){
GLboolean bRet;
glDepthMask(GL_FALSE);
@@ -130,6 +137,18 @@ static void render_image( void )
#endif
glPopMatrix();
+
+ Frames++;
+ if (perf) {
+ GLint t = glutGet(GLUT_ELAPSED_TIME);
+ if (t - T0 >= 5000) {
+ GLfloat seconds = (t - T0) / 1000.0;
+ GLfloat fps = Frames / seconds;
+ printf("%d frames in %6.3f seconds = %6.3f FPS\n", Frames, seconds, fps);
+ T0 = t;
+ Frames = 0;
+ }
+ }
}
@@ -224,6 +243,8 @@ write_ppm(const char *filename, const GLubyte *buffer, int width, int height)
int main( int argc, char *argv[] )
{
void *buffer;
+ int i;
+ char *filename = NULL;
/* Create an RGBA-mode context */
#if OSMESA_MAJOR_VERSION * 100 + OSMESA_MINOR_VERSION >= 305
@@ -237,6 +258,11 @@ int main( int argc, char *argv[] )
return 0;
}
+ for ( i=1; i<argc; i++ ) {
+ if (argv[i][0] != '-') filename = argv[i];
+ if (strcmp(argv[i], "-perf")==0) perf = 1;
+ }
+
/* Allocate the image buffer */
buffer = malloc( WIDTH * HEIGHT * 4 * sizeof(GLubyte) );
if (!buffer) {
@@ -256,16 +282,19 @@ int main( int argc, char *argv[] )
glGetIntegerv(GL_DEPTH_BITS, &z);
glGetIntegerv(GL_STENCIL_BITS, &s);
glGetIntegerv(GL_ACCUM_RED_BITS, &a);
- printf("%d %d %d\n", z, s, a);
+ printf("Depth=%d Stencil=%d Accum=%d\n", z, s, a);
}
render_image();
+ if (perf)
+ for(i=0; i< 1000; i++)
+ render_image();
- if (argc>1) {
+ if (filename != NULL) {
#ifdef SAVE_TARGA
- write_targa(argv[1], buffer, WIDTH, HEIGHT);
+ write_targa(filename, buffer, WIDTH, HEIGHT);
#else
- write_ppm(argv[1], buffer, WIDTH, HEIGHT);
+ write_ppm(filename, buffer, WIDTH, HEIGHT);
#endif
}
else {