support for compute shaders

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "shade_runner"
-version = "0.1.0"
+version = "0.1.1"
 authors = ["Tom Gowan <tomrgowan@gmail.com>"]
 edition = "2018"
 description = "Allows runtime hot loading of shaders for vulkano"
@@ -9,7 +9,6 @@ repository = "https://github.com/freesig/shade_runner"
 readme = "README.md"
 license = "MIT"
 keywords = ["vulkan", "vulkano", "shaders", "hotloading"]
-license_file = "LICENSE"
 
 [dependencies]
 notify = "4"

src/layouts.rs

@@ -5,7 +5,7 @@ use vk::descriptor::descriptor::*;
 use vk::descriptor::pipeline_layout::*;
 use crate::reflection::LayoutData;
 
-#[derive(Debug, Clone)]
+#[derive(Debug, Clone, Default)]
 pub struct Entry {
     pub frag_input: FragInput,
     pub frag_output: FragOutput,
@@ -13,9 +13,10 @@ pub struct Entry {
     pub vert_input: VertInput,
     pub vert_output: VertOutput,
     pub vert_layout: VertLayout,
+    pub compute_layout: ComputeLayout,
 }
 
-#[derive(Debug, Clone)]
+#[derive(Debug, Clone, Default)]
 pub struct FragInput {
     pub inputs: Vec<ShaderInterfaceDefEntry>,
 }
@@ -30,7 +31,7 @@ unsafe impl ShaderInterfaceDef for FragInput {
 
 pub type FragInputIter = std::vec::IntoIter<ShaderInterfaceDefEntry>;
 
-#[derive(Debug, Clone)]
+#[derive(Debug, Clone, Default)]
 pub struct FragOutput {
     pub outputs: Vec<ShaderInterfaceDefEntry>,
 }
@@ -46,11 +47,20 @@ unsafe impl ShaderInterfaceDef for FragOutput {
 pub type FragOutputIter = std::vec::IntoIter<ShaderInterfaceDefEntry>;
 
 // Layout same as with vertex shader.
-#[derive(Debug, Clone)]
+#[derive(Debug, Clone, Default)]
 pub struct FragLayout {
-    pub stages: ShaderStages,
     pub layout_data: LayoutData,
 }
+impl FragLayout {
+    const STAGES: ShaderStages = ShaderStages {
+     vertex: false,
+     tessellation_control: false,
+     tessellation_evaluation: false,
+     geometry: false,
+     fragment: true,
+     compute: false,
+    };
+}
 unsafe impl PipelineLayoutDesc for FragLayout {
     fn num_sets(&self) -> usize {
         self.layout_data.num_sets
@@ -63,7 +73,7 @@ unsafe impl PipelineLayoutDesc for FragLayout {
             .and_then(|s|s.get(&binding))
             .map(|desc| {
                 let mut desc = desc.clone();
-                desc.stages = self.stages;
+                desc.stages = FragLayout::STAGES;
                 desc
             })
 
@@ -75,14 +85,14 @@ unsafe impl PipelineLayoutDesc for FragLayout {
         self.layout_data.pc_ranges.get(num)
             .map(|desc| {
                 let mut desc = *desc;
-                desc.stages = self.stages;
+                desc.stages = FragLayout::STAGES;
                 desc
             })
 
     }
 }
 
-#[derive(Debug, Clone)]
+#[derive(Debug, Clone, Default)]
 pub struct VertInput {
     pub inputs: Vec<ShaderInterfaceDefEntry>,
 }
@@ -97,7 +107,7 @@ unsafe impl ShaderInterfaceDef for VertInput {
 
 pub type VertInputIter = std::vec::IntoIter<ShaderInterfaceDefEntry>;
 
-#[derive(Debug, Clone)]
+#[derive(Debug, Clone, Default)]
 pub struct VertOutput {
     pub outputs: Vec<ShaderInterfaceDefEntry>,
 }
@@ -113,11 +123,20 @@ unsafe impl ShaderInterfaceDef for VertOutput {
 pub type VertOutputIter = std::vec::IntoIter<ShaderInterfaceDefEntry>;
 
 // This structure describes layout of this stage.
-#[derive(Debug, Clone)]
+#[derive(Debug, Clone, Default)]
 pub struct VertLayout {
-    pub stages: ShaderStages,
     pub layout_data: LayoutData,
 }
+impl VertLayout {
+    const STAGES: ShaderStages = ShaderStages {
+     vertex: true,
+     tessellation_control: false,
+     tessellation_evaluation: false,
+     geometry: false,
+     fragment: false,
+     compute: false,
+    };
+}
 unsafe impl PipelineLayoutDesc for VertLayout {
     fn num_sets(&self) -> usize {
         self.layout_data.num_sets
@@ -130,7 +149,54 @@ unsafe impl PipelineLayoutDesc for VertLayout {
             .and_then(|s|s.get(&binding))
             .map(|desc| {
                 let mut desc = desc.clone();
-                desc.stages = self.stages;
+                desc.stages = VertLayout::STAGES;
+                desc
+            })
+
+    }
+    fn num_push_constants_ranges(&self) -> usize {
+        self.layout_data.num_constants
+    }
+    fn push_constants_range(&self, num: usize) -> Option<PipelineLayoutDescPcRange> {
+        self.layout_data.pc_ranges.get(num)
+            .map(|desc| {
+                let mut desc = *desc;
+                desc.stages = VertLayout::STAGES;
+                desc
+            })
+
+    }
+}
+
+#[derive(Debug, Clone, Default)]
+pub struct ComputeLayout {
+    pub layout_data: LayoutData,
+}
+
+impl ComputeLayout {
+    const STAGES: ShaderStages = ShaderStages {
+     vertex: false,
+     tessellation_control: false,
+     tessellation_evaluation: false,
+     geometry: false,
+     fragment: false,
+     compute: true,
+    };
+}
+
+unsafe impl PipelineLayoutDesc for ComputeLayout {
+    fn num_sets(&self) -> usize {
+        self.layout_data.num_sets
+    }
+    fn num_bindings_in_set(&self, set: usize) -> Option<usize> {
+        self.layout_data.num_bindings.get(&set).map(|&b|b)
+    }
+    fn descriptor(&self, set: usize, binding: usize) -> Option<DescriptorDesc> {
+        self.layout_data.descriptions.get(&set)
+            .and_then(|s|s.get(&binding))
+            .map(|desc| {
+                let mut desc = desc.clone();
+                desc.stages = Self::STAGES;
                 desc
             })
 
@@ -142,7 +208,7 @@ unsafe impl PipelineLayoutDesc for VertLayout {
         self.layout_data.pc_ranges.get(num)
             .map(|desc| {
                 let mut desc = *desc;
-                desc.stages = self.stages;
+                desc.stages = Self::STAGES;
                 desc
             })
 

src/lib.rs

@@ -18,6 +18,7 @@ use shaderc::ShaderKind;
 pub struct CompiledShaders {
     pub vertex: Vec<u32>,
     pub fragment: Vec<u32>,
+    pub compute: Vec<u32>,
 }
 
 /// Loads and compiles the vertex and fragment GLSL shaders from files
@@ -27,7 +28,21 @@ where
 {
     let vertex = compiler::compile(vertex, ShaderKind::Vertex).map_err(Error::Compile)?;
     let fragment = compiler::compile(fragment, ShaderKind::Fragment).map_err(Error::Compile)?;
-    Ok(CompiledShaders{ vertex, fragment })
+    Ok(CompiledShaders{ vertex, fragment, compute: Vec::new() })
+}
+
+// TODO this should be incorpoarted into load but that would be
+// a breaking change. Do this in next major version
+pub fn load_compute<T>(compute: T) -> Result<CompiledShaders, Error>
+where
+    T: AsRef<Path>,
+{
+    let compute = compiler::compile(compute, ShaderKind::Compute).map_err(Error::Compile)?;
+    Ok(CompiledShaders{ vertex: Vec::new(), fragment: Vec::new(), compute })
+}
+
+pub fn parse_compute(code: &CompiledShaders) -> Result<Entry, Error> {
+    reflection::create_compute_entry(code)
 }
 
 /// Parses the shaders and gives an entry point

src/reflection.rs

@@ -36,10 +36,6 @@ pub fn create_entry(shaders: &CompiledShaders) -> Result<Entry, Error> {
         outputs: fragment_interfaces.outputs,
     };
     let frag_layout = FragLayout {
-        stages: ShaderStages {
-            fragment: true,
-            ..ShaderStages::none()
-        },
         layout_data: fragment_layout,
     };
     let vert_input = VertInput {
@@ -49,10 +45,6 @@ pub fn create_entry(shaders: &CompiledShaders) -> Result<Entry, Error> {
         outputs: vertex_interfaces.outputs,
     };
     let vert_layout = VertLayout {
-        stages: ShaderStages {
-            vertex: true,
-            ..ShaderStages::none()
-        },
         layout_data: vertex_layout,
     };
     Ok(Entry {
@@ -62,6 +54,15 @@ pub fn create_entry(shaders: &CompiledShaders) -> Result<Entry, Error> {
         vert_output,
         frag_layout,
         vert_layout,
+        compute_layout: Default::default(),
+    })
+}
+
+pub fn create_compute_entry(shaders: &CompiledShaders) -> Result<Entry, Error> {
+    create_layouts(&shaders.compute).map(|layout_data| {
+        let mut entry = Entry::default();
+        entry.compute_layout = ComputeLayout{ layout_data };
+        entry
     })
 }
 

src/watch.rs

@@ -13,12 +13,27 @@ pub struct Watch {
     pub rx: Receiver<Result<Message, Error>>,
 }
 
-struct Loader {
+enum Loader {
+    Graphics(GraphicsLoader),
+    Compute(ComputeLoader),
+}
+
+enum SrcPath {
+    Graphics(PathBuf, PathBuf),
+    Compute(PathBuf),
+}
+
+struct GraphicsLoader {
     vertex: PathBuf,
     fragment: PathBuf,
     tx: Sender<Result<Message, Error>>,
 }
 
+struct ComputeLoader {
+    compute: PathBuf,
+    tx: Sender<Result<Message, Error>>,
+}
+
 pub struct Message {
     pub shaders: CompiledShaders,
     pub entry: Entry,
@@ -31,9 +46,28 @@ impl Watch {
     where
         T: AsRef<Path>,
     {
-        let (handler, rx) = create_watch(
+        let src_path = SrcPath::Graphics(
             vertex.as_ref().to_path_buf(),
-            fragment.as_ref().to_path_buf(),
+            fragment.as_ref().to_path_buf()
+            );
+        let (handler, rx) = create_watch(
+            src_path,
+            frequency,
+        )?;
+        Ok(Watch {
+            _handler: handler,
+            rx,
+        })
+    }
+
+    pub fn create_compute<T>(compute: T, frequency: Duration) -> Result<Self, Error>
+    where
+        T: AsRef<Path>,
+    {
+        let src_path = SrcPath::Compute(
+            compute.as_ref(). to_path_buf());
+        let (handler, rx) = create_watch(
+            src_path,
             frequency,
         )?;
         Ok(Watch {
@@ -43,10 +77,10 @@ impl Watch {
     }
 }
 
-impl Loader {
+impl GraphicsLoader {
     fn create(vertex: PathBuf, fragment: PathBuf) -> (Self, Receiver<Result<Message, Error>>) {
         let (tx, rx) = mpsc::channel();
-        let loader = Loader {
+        let loader = GraphicsLoader {
             vertex,
             fragment,
             tx,
@@ -67,6 +101,38 @@ impl Loader {
     }
 }
 
+impl ComputeLoader {
+    fn create(compute: PathBuf) -> (Self, Receiver<Result<Message, Error>>) {
+        let (tx, rx) = mpsc::channel();
+        let loader = ComputeLoader {
+            compute,
+            tx,
+        };
+        loader.reload();
+        (loader, rx)
+    }
+
+    fn reload(&self) {
+        match crate::load_compute(&self.compute) {
+            Ok(shaders) => {
+                let entry = crate::parse_compute(&shaders);
+                let msg = entry.map(|entry| Message { shaders, entry });
+                self.tx.send(msg).ok()
+            }
+            Err(e) => self.tx.send(Err(e)).ok(),
+        };
+    }
+}
+
+impl Loader {
+    fn reload(&self) {
+        match self {
+            Loader::Graphics(g) => g.reload(),
+            Loader::Compute(g) => g.reload(),
+        }
+    }
+}
+
 struct Handler {
     thread_tx: mpsc::Sender<()>,
     handle: Option<thread::JoinHandle<()>>,
@@ -83,8 +149,7 @@ impl Drop for Handler {
 }
 
 fn create_watch(
-    vert_path: PathBuf,
+    src_path: SrcPath,
-    frag_path: PathBuf,
     frequency: Duration
 ) -> Result<(Handler, mpsc::Receiver<Result<Message, Error>>), Error> {
     let (notify_tx, notify_rx) = mpsc::channel();
@@ -92,6 +157,8 @@ fn create_watch(
     let mut watcher: RecommendedWatcher =
         Watcher::new(notify_tx, frequency).map_err(Error::FileWatch)?;
 
+    let (loader, rx) = match src_path {
+        SrcPath::Graphics(vert_path, frag_path) => {
             let mut vp = vert_path.clone();
             let mut fp = frag_path.clone();
             vp.pop();
@@ -105,7 +172,21 @@ fn create_watch(
                     .map_err(Error::FileWatch)?;
             }
 
-    let (loader, rx) = Loader::create(vert_path, frag_path);
+            let (loader, rx) = GraphicsLoader::create(vert_path, frag_path);
+            (Loader::Graphics(loader), rx)
+        }
+        SrcPath::Compute(compute_path) => {
+            let mut cp = compute_path.clone();
+            cp.pop();
+            watcher
+                .watch(&cp, RecursiveMode::NonRecursive)
+                .map_err(Error::FileWatch)?;
+
+            let (loader, rx) = ComputeLoader::create(compute_path);
+            (Loader::Compute(loader), rx)
+        }
+    };
+
 
     let handle = thread::spawn(move || 'watch_loop: loop {
         if thread_rx.try_recv().is_ok() {

tests/tests.rs

@@ -81,6 +81,7 @@ where
 fn test_shade1() {
     setup();
     let target = Entry {
+        compute_layout: Default::default(),
         frag_input: FragInput { inputs: Vec::new() },
         frag_output: FragOutput {
             outputs: vec![ShaderInterfaceDefEntry {
@@ -90,10 +91,6 @@ fn test_shade1() {
             }],
         },
         frag_layout: FragLayout {
-            stages: ShaderStages {
-                fragment: true,
-                ..ShaderStages::none()
-            },
             layout_data: LayoutData {
                 num_sets: 0,
                 num_bindings: HashMap::new(),
@@ -113,10 +110,6 @@ fn test_shade1() {
             outputs: Vec::new(),
         },
         vert_layout: VertLayout {
-            stages: ShaderStages {
-                vertex: true,
-                ..ShaderStages::none()
-            },
             layout_data: LayoutData {
                 num_sets: 0,
                 num_bindings: HashMap::new(),
@@ -134,6 +127,7 @@ fn test_shade1() {
 fn test_shade2() {
     setup();
     let target = Entry {
+        compute_layout: Default::default(),
         frag_input: FragInput {
             inputs: vec![
                 ShaderInterfaceDefEntry {
@@ -161,10 +155,6 @@ fn test_shade2() {
             }],
         },
         frag_layout: FragLayout {
-            stages: ShaderStages {
-                fragment: true,
-                ..ShaderStages::none()
-            },
             layout_data: LayoutData {
                 num_sets: 0,
                 num_bindings: HashMap::new(),
@@ -200,10 +190,6 @@ fn test_shade2() {
             ],
         },
         vert_layout: VertLayout {
-            stages: ShaderStages {
-                vertex: true,
-                ..ShaderStages::none()
-            },
             layout_data: LayoutData {
                 num_sets: 0,
                 num_bindings: HashMap::new(),
@@ -221,6 +207,7 @@ fn test_shade2() {
 fn test_shade3() {
     setup();
     let target = Entry {
+        compute_layout: Default::default(),
         frag_input: FragInput { inputs: Vec::new() },
         frag_output: FragOutput {
             outputs: vec![ShaderInterfaceDefEntry {
@@ -230,10 +217,6 @@ fn test_shade3() {
             }],
         },
         frag_layout: FragLayout {
-            stages: ShaderStages {
-                fragment: true,
-                ..ShaderStages::none()
-            },
             layout_data: LayoutData {
                 num_sets: 1,
                 num_bindings: vec![(0, 1)].into_iter().collect(),
@@ -277,10 +260,6 @@ fn test_shade3() {
             outputs: Vec::new(),
         },
         vert_layout: VertLayout {
-            stages: ShaderStages {
-                vertex: true,
-                ..ShaderStages::none()
-            },
             layout_data: LayoutData {
                 num_sets: 0,
                 num_bindings: HashMap::new(),
@@ -309,6 +288,7 @@ fn test_shade3() {
 fn test_shade4() {
     setup();
     let target = Entry {
+        compute_layout: Default::default(),
         frag_input: FragInput { inputs: Vec::new() },
         frag_output: FragOutput {
             outputs: vec![ShaderInterfaceDefEntry {
@@ -318,10 +298,6 @@ fn test_shade4() {
             }],
         },
         frag_layout: FragLayout {
-            stages: ShaderStages {
-                fragment: true,
-                ..ShaderStages::none()
-            },
             layout_data: LayoutData {
                 num_sets: 0,
                 num_bindings: HashMap::new(),
@@ -348,10 +324,6 @@ fn test_shade4() {
             outputs: Vec::new(),
         },
         vert_layout: VertLayout {
-            stages: ShaderStages {
-                vertex: true,
-                ..ShaderStages::none()
-            },
             layout_data: LayoutData {
                 num_sets: 0,
                 num_bindings: HashMap::new(),