Add a -benchmark mode.

1 files changed, 33 insertions, 11 deletions

diff --git a/glass.c b/glass.c
index 486b257..09f0fe4 100644
--- a/glass.c
+++ b/glass.c
@@ -116,7 +116,7 @@ float ring_bounding_sphere_radius;
 
 static time_t start_tv_sec = 0;
 static float start_time, cur_time, last_fps_time = 0;
-int no_multi_draw_arrays;
+int no_multi_draw_arrays = 0, benchmark = 0;
 static int frames = 0, last_fps_frames = 0;
 static SDL_Surface *sdl_surf = NULL;
 static GLboolean done = GL_FALSE;
@@ -381,6 +381,19 @@ draw(void)
 
 	SDL_GL_SwapBuffers();
 	frames++;
+
+	if (benchmark && frames >= 5 * 60) {
+		float total_time;
+
+		glFinish();
+
+		total_time = get_time_in_secs() - start_time;
+		printf("%d frames in %.2f secs: %.1f fps\n",
+		       frames,
+		       total_time,
+		       frames / total_time) ;
+		done = GL_TRUE;
+	}
 }
 
 static void
@@ -978,16 +991,23 @@ timer_callback(uint32_t interval, void *not_used)
 static void
 idle(void)
 {
-	cur_time = get_time_in_secs() - start_time;
+	static float bench_time = 0;
 
-	if (cur_time > last_fps_time + 5) {
-		printf("%d frames in %.2f secs: %.1f fps\n",
-		       frames - last_fps_frames,
-		       cur_time - last_fps_time,
-		       (frames - last_fps_frames) /
-		       (cur_time - last_fps_time));
-		last_fps_time = cur_time;
-		last_fps_frames = frames;
+	if (benchmark) {
+		cur_time = bench_time;
+		bench_time += 1.0 / 60.0;
+	} else {
+		cur_time = get_time_in_secs() - start_time;
+
+		if (cur_time > last_fps_time + 5) {
+			printf("%d frames in %.2f secs: %.1f fps\n",
+			       frames - last_fps_frames,
+			       cur_time - last_fps_time,
+			       (frames - last_fps_frames) /
+			       (cur_time - last_fps_time));
+			last_fps_time = cur_time;
+			last_fps_frames = frames;
+		}
 	}
 }
 
@@ -1014,7 +1034,7 @@ key(SDLKey sym)
 
 static void usage(char *program)
 {
-	fprintf(stderr, "usage: %s [-nomultidraw]\n", program);
+	fprintf(stderr, "usage: %s [-nomultidraw] [-benchmark]\n", program);
 	exit(1);
 }
 
@@ -1089,6 +1109,8 @@ int main(int argc, char **argv)
 	for (i = 1; i < argc; i++) {
 		if (strcmp(argv[i], "-nomultidraw") == 0)
 			no_multi_draw_arrays = 1;
+		if (strcmp(argv[i], "-benchmark") == 0)
+			benchmark = 1;
 		else
 			usage(argv[0]);
 	}