add a stats file for camera statistics.

1 files changed, 13 insertions, 0 deletions

diff --git a/fs.c b/fs.c
index fe46cb0..df4de3f 100644
--- a/fs.c
+++ b/fs.c
@@ -48,6 +48,7 @@ enum {
 	Qnew,
 	Qn,
 	Qctl,
+	Qstats,
 	Qframe,
 	Qscene,
 };
@@ -67,6 +68,7 @@ Dirtab dirtab[] = {
  [Qnew]		"new",		0666,
  [Qn]		nil,		DMDIR|0555,
  [Qctl]		"ctl",		0666,
+ [Qstats]	"stats",	0444,
  [Qframe]	"frame",	0444,
  [Qscene]	"scene",	0666,
 };
@@ -163,6 +165,7 @@ resetcamera(Camera *c)
 	c->rctl = renderer;
 	placecamera(c, Pt3(0,0,100,1), Pt3(0,0,0,1), Vec3(0,1,0));
 	reloadcamera(c);
+	memset(&c->stats, 0, sizeof c->stats);
 }
 
 static ulong
@@ -416,6 +419,16 @@ fsread(Req *r)
 		readstr(r, buf);
 		respond(r, nil);
 		break;
+	case Qstats:
+		n = snprint(buf, sizeof buf, "fps %.0f/%.0f/%.0f/%.0f\n",
+			!c->cam->stats.max? 0: 1e9/c->cam->stats.max,
+			!c->cam->stats.avg? 0: 1e9/c->cam->stats.avg,
+			!c->cam->stats.min? 0: 1e9/c->cam->stats.min,
+			!c->cam->stats.v? 0: 1e9/c->cam->stats.v);
+		snprint(buf+n, sizeof(buf)-n, "frame #%llud\n", c->cam->stats.nframes);
+		readstr(r, buf);
+		respond(r, nil);
+		break;
 	case Qframe:
 		fb = c->cam->vp->getfb(c->cam->vp);
 		i = fb->cb;