Add pipeline loader

src/core/render/resources/mod.rs

@@ -1,2 +1,3 @@
 pub mod meshes;
+pub mod pipeline;
 pub mod texture;

src/core/render/resources/pipeline/loader.rs

@@ -0,0 +1,112 @@
+use std::{
+    any::TypeId,
+    collections::HashMap,
+    error::Error,
+    sync::{Arc, RwLock},
+};
+
+use vulkano::{device::Device, format::Format, pipeline::GraphicsPipeline};
+
+#[derive(PartialEq, Eq)]
+pub enum PipelineState {
+    NeedBuild,
+    Loaded,
+}
+
+pub type GraphicsPipelineLoadFn =
+    fn(&Arc<Device>, Format, Format) -> Result<Arc<GraphicsPipeline>, Box<dyn Error>>;
+
+pub struct PipelineLoader {
+    device: Arc<Device>,
+    swapchain_image_format: Format,
+    depth_image_format: Format,
+
+    // Arc<GraphicsPipeline> is used in internal of vulkano. It's not possible to use Arc<RwLock<Option<GraphicsPipeline>>> directly.
+    pipelines_index: HashMap<TypeId, usize>,
+    pipelines_id: Vec<TypeId>,
+    pipelines_load_fn: Vec<GraphicsPipelineLoadFn>,
+    // Only content is protected by Arc and RwLock to avoid push in pipeline_loader in multiple threads and just allow to lock each pipeline when is needed as parallel pipelines loading.
+    // But only the pipeline loader is allowed to load a pipeline when it's needed.
+    pipelines: Vec<Arc<RwLock<Option<Arc<GraphicsPipeline>>>>>,
+    pipelines_state: Vec<Arc<RwLock<PipelineState>>>,
+}
+
+impl PipelineLoader {
+    pub fn new(
+        device: Arc<Device>,
+        swapchain_image_format: Format,
+        depth_image_format: Format,
+    ) -> Self {
+        Self {
+            device,
+            swapchain_image_format,
+            depth_image_format,
+            pipelines: Vec::new(),
+            pipelines_load_fn: Vec::new(),
+            pipelines_id: Vec::new(),
+            pipelines_state: Vec::new(),
+            pipelines_index: HashMap::new(),
+        }
+    }
+
+    pub fn register<T: 'static>(
+        &mut self,
+        load_fn: GraphicsPipelineLoadFn,
+    ) -> Result<(), Box<dyn Error>> {
+        let id = TypeId::of::<T>();
+        self.pipelines_index.insert(id, self.pipelines.len());
+        self.pipelines_id.push(id);
+        self.pipelines_load_fn.push(load_fn);
+        self.pipelines_state
+            .push(Arc::new(RwLock::new(PipelineState::NeedBuild)));
+        self.pipelines.push(Arc::new(RwLock::new(None)));
+        Ok(())
+    }
+
+    pub fn load_pipelines(&self) -> Result<(), Box<dyn Error>> {
+        let iter = self
+            .pipelines_id
+            .iter()
+            .zip(self.pipelines.iter())
+            .zip(self.pipelines_load_fn.iter())
+            .zip(self.pipelines_state.iter())
+            .filter(|(_, state)| {
+                let state = state.read().unwrap();
+                *state == PipelineState::NeedBuild
+            });
+
+        for (((id, pipeline), load_fn), state) in iter {
+            let new_pipeline = load_fn(
+                &self.device,
+                self.swapchain_image_format,
+                self.depth_image_format,
+            )?;
+            let mut pipeline = pipeline.write().unwrap();
+            *pipeline = Some(new_pipeline);
+            let mut state = state.write().unwrap();
+            *state = PipelineState::Loaded;
+            tracing::trace!("Pipeline {id:?} loaded");
+        }
+        Ok(())
+    }
+
+    fn mark_pipelines_as_need_build(&mut self) {
+        for state in self.pipelines_state.iter() {
+            let mut state = state.write().unwrap();
+            *state = PipelineState::NeedBuild;
+        }
+    }
+
+    pub fn with_pipeline<T: 'static, F>(&self, f: F) -> Result<(), Box<dyn Error>>
+    where
+        F: FnOnce(&Arc<GraphicsPipeline>) -> Result<(), Box<dyn Error>>,
+    {
+        let id = TypeId::of::<T>();
+        let index = self.pipelines_index.get(&id).ok_or("Pipeline not found")?;
+        let pipeline_locker = self.pipelines[*index]
+            .read()
+            .map_err(|_| "Failed to lock pipeline")?;
+        let pipeline = pipeline_locker.as_ref().ok_or("Pipeline not loaded")?;
+        f(pipeline)
+    }
+}

src/core/render/resources/pipeline/mod.rs

@@ -0,0 +1,2 @@
+mod loader;
+pub use loader::{GraphicsPipelineLoadFn, PipelineLoader};

src/game/assets/pipelines/simple.rs

@@ -1,4 +1,7 @@
-use std::{error::Error, sync::Arc};
+use std::{
+    error::Error,
+    sync::{Arc, RwLock},
+};
 
 use vulkano::{
     command_buffer::{AutoCommandBufferBuilder, PrimaryAutoCommandBuffer},
@@ -33,16 +36,14 @@ use crate::core::render::{
     resources::texture::Texture,
 };
 
-pub struct SimplePipeline {
-    pipeline: Arc<GraphicsPipeline>,
-}
+pub struct SimplePipeline;
 
 impl SimplePipeline {
     pub fn new(
         device: &Arc<Device>,
         swapchain_format: Format,
         depth_format: Format,
-    ) -> Result<Self, Box<dyn Error>> {
+    ) -> Result<Arc<GraphicsPipeline>, Box<dyn Error>> {
         let vs = shaders::vs::load(device.clone())?
             .entry_point("main")
             .ok_or("Failed find main entry point of vertex shader".to_string())?;
@@ -111,11 +112,7 @@ impl SimplePipeline {
             },
         )?;
 
-        Ok(Self { pipeline })
-    }
-
-    pub fn pipeline(&self) -> &Arc<GraphicsPipeline> {
-        &self.pipeline
+        Ok(pipeline)
     }
 }
 

src/game/scenes/main_scene.rs

@@ -11,6 +11,7 @@ use crate::core::render::primitives::transform::Transform;
 use crate::core::render::primitives::{AsDescriptorSet, AsRecordable};
 use crate::core::render::render_pass_manager::{RenderPassConfig, RenderPassManager};
 use crate::core::render::resources::meshes::{ObjMesh, SquareMesh};
+use crate::core::render::resources::pipeline::PipelineLoader;
 use crate::core::render::resources::texture::{TextureLoadInfo, TextureLoader, TextureSourceKind};
 use crate::core::scene::Scene;
 use crate::game::assets::pipelines::simple::SimplePipeline;
@@ -28,9 +29,9 @@ use winit::window::CursorGrabMode;
 
 pub struct MainSceneState {
     texture_loader: TextureLoader,
+    pipeline_loader: PipelineLoader,
     square: SquareMesh,
     obj: ObjMesh,
-    simple_pipeline: SimplePipeline,
     square_instances: Vec<Transform>,
     obj_instances: Vec<Transform>,
     camera: Camera3D,
@@ -55,6 +56,14 @@ impl Scene for MainScene {
         let swapchain_image_view =
             app_context.with_renderer(|renderer| renderer.swapchain_image_view().clone());
 
+        let mut pipeline_loader = PipelineLoader::new(
+            app_context.device.clone(),
+            swapchain_image_view.format(),
+            depth_image_view.format(),
+        );
+        pipeline_loader.register::<SimplePipeline>(SimplePipeline::new)?;
+        pipeline_loader.load_pipelines()?;
+
         let mut texture_loader = TextureLoader::new(app_context);
         texture_loader.add_texture(
             "wooden-crate".to_string(),
@@ -90,11 +99,6 @@ impl Scene for MainScene {
             let obj = ObjMesh::new(&app_context.memory_allocator, "res/objects/cube.obj")?;
             obj.into_iter().next().unwrap()
         };
-        let simple_pipeline = SimplePipeline::new(
-            &app_context.device,
-            swapchain_image_view.format(),
-            depth_image_view.format(),
-        )?;
 
         let num_instances = 100;
         let instance_size = 10.0;
@@ -147,7 +151,7 @@ impl Scene for MainScene {
         self.state = Some(MainSceneState {
             square,
             obj,
-            simple_pipeline,
+            pipeline_loader,
             square_instances,
             obj_instances,
             camera,
@@ -256,43 +260,53 @@ impl Scene for MainScene {
         let obj_transform_uniform =
             Transform::create_buffer(&app_context.memory_allocator, &state.obj_instances)?;
 
-        SimplePipeline::record_bind_commands(
-            &mut builder,
-            &app_context.descriptor_set_allocator,
-            state.simple_pipeline.pipeline(),
-            &state.square,
-            &square_transform_uniform,
-            vec![
-                camera_uniform.clone() as Arc<dyn AsDescriptorSet>,
-                state
-                    .texture_loader
-                    .get_texture("wooden-crate")
-                    .unwrap()
-                    .clone(),
-            ],
-        )?;
-        SimplePipeline::record_draw_commands(
-            &mut builder,
-            &state.square,
-            &square_transform_uniform,
-        )?;
+        state
+            .pipeline_loader
+            .with_pipeline::<SimplePipeline, _>(|pipeline| {
+                SimplePipeline::record_bind_commands(
+                    &mut builder,
+                    &app_context.descriptor_set_allocator,
+                    pipeline,
+                    &state.square,
+                    &square_transform_uniform,
+                    vec![
+                        camera_uniform.clone() as Arc<dyn AsDescriptorSet>,
+                        state
+                            .texture_loader
+                            .get_texture("wooden-crate")
+                            .unwrap()
+                            .clone(),
+                    ],
+                )?;
+                SimplePipeline::record_draw_commands(
+                    &mut builder,
+                    &state.square,
+                    &square_transform_uniform,
+                )?;
 
-        SimplePipeline::record_bind_commands(
-            &mut builder,
-            &app_context.descriptor_set_allocator,
-            state.simple_pipeline.pipeline(),
-            &state.obj,
-            &obj_transform_uniform,
-            vec![
-                camera_uniform.clone() as Arc<dyn AsDescriptorSet>,
-                state
-                    .texture_loader
-                    .get_texture("cube-diffuse")
-                    .unwrap()
-                    .clone(),
-            ],
-        )?;
-        SimplePipeline::record_draw_commands(&mut builder, &state.obj, &obj_transform_uniform)?;
+                SimplePipeline::record_bind_commands(
+                    &mut builder,
+                    &app_context.descriptor_set_allocator,
+                    pipeline,
+                    &state.obj,
+                    &obj_transform_uniform,
+                    vec![
+                        camera_uniform.clone() as Arc<dyn AsDescriptorSet>,
+                        state
+                            .texture_loader
+                            .get_texture("cube-diffuse")
+                            .unwrap()
+                            .clone(),
+                    ],
+                )?;
+                SimplePipeline::record_draw_commands(
+                    &mut builder,
+                    &state.obj,
+                    &obj_transform_uniform,
+                )?;
+
+                Ok(())
+            })?;
 
         RenderPassManager::end_rendering(&mut builder)?;