From 78da1c644141e87bb47ae907ef9d80fb926c1965 Mon Sep 17 00:00:00 2001
From: Bill Thiede <git@xinu.tv>
Date: Sat, 22 Sep 2018 12:03:46 -0700
Subject: [PATCH] List choices for --mode and make --pprof a path, not just a
 bool.

---
 rtiow/src/renderer.rs | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/rtiow/src/renderer.rs b/rtiow/src/renderer.rs
index a285b21..1ac7528 100644
--- a/rtiow/src/renderer.rs
+++ b/rtiow/src/renderer.rs
@@ -78,10 +78,11 @@ pub struct Opt {
     /// Sub-samples per pixel
     #[structopt(short = "s", long = "subsample", default_value = "1")]
     pub subsamples: usize,
+    /// Select scene to render, one of: "bench", "book", "tutorial" "cube", "bvh", "test"
     #[structopt(long = "model", default_value = "test")]
     pub model: Model,
-    #[structopt(long = "pprof")]
-    pub pprof: bool,
+    #[structopt(long = "pprof", parse(from_os_str))]
+    pub pprof: Option<PathBuf>,
     /// Use acceleration data structure, may be BVH or kd-tree depending on scene.
     #[structopt(long = "use_accel")]
     pub use_accel: bool,