Add fps output
diff --git a/progs/demos/arbfplight.c b/progs/demos/arbfplight.c
index 7a40520..50a1b7e 100644
--- a/progs/demos/arbfplight.c
+++ b/progs/demos/arbfplight.c
@@ -25,6 +25,9 @@
static GLboolean Wire = GL_FALSE;
static GLboolean PixelLight = GL_TRUE;
+static GLint T0 = 0;
+static GLint Frames = 0;
+
static GLfloat Xrot = 0, Yrot = 0;
static PFNGLPROGRAMLOCALPARAMETER4FVARBPROC glProgramLocalParameter4fvARB_func;
@@ -68,6 +71,19 @@
glPopMatrix();
glutSwapBuffers();
+
+ Frames++;
+
+ if (Anim) {
+ 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;
+ }
+ }
}