Added resource counter. Bumped the version number

Author: kvark

Cargo.toml

@@ -14,7 +14,7 @@
 
 [package]
 name = "gfx"
-version = "0.2.1"
+version = "0.2.2"
 description = "A high-performance, bindless graphics API"
 homepage = "https://github.com/gfx-rs/gfx-rs"
 repository = "https://github.com/gfx-rs/gfx-rs"

src/device/handle.rs

@@ -177,6 +177,8 @@ pub trait Producer<R: Resources> {
     fn make_surface(&mut self, R::Surface, tex::SurfaceInfo) -> Surface<R>;
     fn make_texture(&mut self, R::Texture, tex::TextureInfo) -> Texture<R>;
     fn make_sampler(&mut self, R::Sampler, tex::SamplerInfo) -> Sampler<R>;
+    /// Walk through all the handles, keep ones that are reference elsewhere
+    /// and call the provided delete function (resource-specific) for others
     fn clean_with<T,
         F1: Fn(&mut T, &R::Buffer),
         F2: Fn(&mut T, &R::ArrayBuffer),
@@ -298,6 +300,17 @@ impl<R: Resources> Manager<R> {
         self.textures     .extend(other.textures     .iter().map(|h| h.clone()));
         self.samplers     .extend(other.samplers     .iter().map(|h| h.clone()));
     }
+    /// Count the total number of referenced resources
+    pub fn count(&self) -> usize {
+        self.buffers.len() +
+        self.array_buffers.len() +
+        self.shaders.len() +
+        self.programs.len() +
+        self.frame_buffers.len() +
+        self.surfaces.len() +
+        self.textures.len() +
+        self.samplers.len()
+    }
     /// Reference a buffer
     pub fn ref_buffer(&mut self, handle: &RawBuffer<R>) -> R::Buffer {
         self.buffers.push(handle.0.clone());