shithub: renderfs

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add a stats file for camera statistics.

--- a/fs.c

+++ b/fs.c

@@ -48,6 +48,7 @@

 	Qnew,

 	Qn,

 	Qctl,

+	Qstats,

 	Qframe,

 	Qscene,

 };

@@ -67,6 +68,7 @@

  [Qnew]		"new",		0666,

  [Qn]		nil,		DMDIR|0555,

  [Qctl]		"ctl",		0666,

+ [Qstats]	"stats",	0444,

  [Qframe]	"frame",	0444,

  [Qscene]	"scene",	0666,

 };

@@ -163,6 +165,7 @@

 	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

@@ -413,6 +416,16 @@

 		break;

 	case Qctl:

 		snprint(buf, sizeof buf, "%llud", SLOT(path));

+		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;