summaryrefslogtreecommitdiff
path: root/progs/vp
diff options
context:
space:
mode:
authorZack Rusin <zack@tungstengraphics.com>2007-11-09 08:19:27 -0500
committerZack Rusin <zack@tungstengraphics.com>2007-12-11 09:49:33 -0500
commit025b140b2fd6860039a0d4b545130751473563c5 (patch)
tree77b126a0f0a4f0e405d4cf7da11546c69c3a0084 /progs/vp
parent6dc4e6ae15676cf4acdebb9c798bfa4083ad1e14 (diff)
Add a simple fps counter to the example
Diffstat (limited to 'progs/vp')
-rw-r--r--progs/vp/vp-tris.c31
1 files changed, 30 insertions, 1 deletions
diff --git a/progs/vp/vp-tris.c b/progs/vp/vp-tris.c
index 5dbe5ac835..e5be65e78c 100644
--- a/progs/vp/vp-tris.c
+++ b/progs/vp/vp-tris.c
@@ -7,6 +7,8 @@
#include <math.h>
#define GL_GLEXT_PROTOTYPES
#include <GL/glut.h>
+#include <unistd.h>
+#include <signal.h>
static const char *filename = NULL;
static GLuint nr_steps = 4;
@@ -18,8 +20,24 @@ static void usage( char *name )
fprintf( stderr, "options:\n" );
fprintf( stderr, " -f flat shaded\n" );
fprintf( stderr, " -nNr subdivision steps\n" );
+ fprintf( stderr, " -fps show frames per second\n" );
}
+unsigned show_fps = 0;
+unsigned int frame_cnt = 0;
+void alarmhandler(int);
+
+void alarmhandler (int sig)
+{
+ if (sig == SIGALRM) {
+ printf("%d frames in 5.0 seconds = %.3f FPS\n", frame_cnt,
+ frame_cnt / 5.0);
+
+ frame_cnt = 0;
+ }
+ signal(SIGALRM, alarmhandler);
+ alarm(5);
+}
static void args(int argc, char *argv[])
{
@@ -32,6 +50,9 @@ static void args(int argc, char *argv[])
else if (strcmp(argv[i], "-f") == 0) {
glShadeModel(GL_FLAT);
}
+ else if (strcmp(argv[i], "-fps") == 0) {
+ show_fps = 1;
+ }
else if (i == argc - 1) {
filename = argv[i];
}
@@ -168,7 +189,11 @@ static void Display( void )
glEnd();
- glFlush();
+ glFlush();
+ if (show_fps) {
+ ++frame_cnt;
+ glutPostRedisplay();
+ }
}
@@ -211,6 +236,10 @@ int main( int argc, char *argv[] )
glutDisplayFunc( Display );
args( argc, argv );
Init();
+ if (show_fps) {
+ signal(SIGALRM, alarmhandler);
+ alarm(5);
+ }
glutMainLoop();
return 0;
}