aurora: Add naive pipeline cache

aurora/lib/gfx/common.cpp

@@ -10,6 +10,7 @@
 #include <deque>
 #include <logvisor/logvisor.hpp>
 #include <thread>
+#include <fstream>
 
 namespace aurora::gfx {
 static logvisor::Module Log("aurora::gfx");
@@ -124,7 +125,23 @@ static PipelineRef g_currentPipeline;
 
 static std::vector<Command> g_commands;
 
-static void find_pipeline(PipelineRef hash, NewPipelineCallback&& cb) {
+static ByteBuffer g_serializedPipelines;
+static u32 g_serializedPipelineCount = 0;
+
+template <typename PipelineConfig>
+static void serialize_pipeline_config(ShaderType type, const PipelineConfig& config) {
+  static_assert(std::has_unique_object_representations_v<PipelineConfig>);
+  g_serializedPipelines.append(&type, sizeof(type));
+  const u32 configSize = sizeof(config);
+  g_serializedPipelines.append(&configSize, sizeof(configSize));
+  g_serializedPipelines.append(&config, configSize);
+  ++g_serializedPipelineCount;
+}
+
+template <typename PipelineConfig>
+static PipelineRef find_pipeline(ShaderType type, const PipelineConfig& config, NewPipelineCallback&& cb,
+                                 bool serialize = true) {
+  PipelineRef hash = xxh3_hash(config, static_cast<XXH64_hash_t>(type));
   bool found = false;
   {
     std::scoped_lock guard{g_pipelineMutex};
@@ -138,17 +155,24 @@ static void find_pipeline(PipelineRef hash, NewPipelineCallback&& cb) {
         }
       } else {
         g_pipelines.try_emplace(hash, cb());
+        if (serialize) {
+          serialize_pipeline_config(type, config);
+        }
         found = true;
       }
     }
     if (!found) {
       g_queuedPipelines.emplace_back(std::pair{hash, std::move(cb)});
+      if (serialize) {
+        serialize_pipeline_config(type, config);
+      }
     }
   }
   if (!found) {
     g_pipelineCv.notify_one();
     queuedPipelines++;
   }
+  return hash;
 }
 
 static void push_draw_command(ShaderDrawCommand data) {
@@ -204,9 +228,7 @@ void queue_movie_player(const TextureHandle& tex_y, const TextureHandle& tex_u,
 }
 template <>
 PipelineRef pipeline_ref(movie_player::PipelineConfig config) {
-  PipelineRef ref = xxh3_hash(config, static_cast<XXH64_hash_t>(ShaderType::MoviePlayer));
-  find_pipeline(ref, [=]() { return create_pipeline(g_state.moviePlayer, config); });
-  return ref;
+  return find_pipeline(ShaderType::MoviePlayer, config, [=]() { return create_pipeline(g_state.moviePlayer, config); });
 }
 
 template <>
@@ -219,9 +241,7 @@ void push_draw_command(stream::DrawData data) {
 }
 template <>
 PipelineRef pipeline_ref(stream::PipelineConfig config) {
-  PipelineRef ref = xxh3_hash(config, static_cast<XXH64_hash_t>(ShaderType::Stream));
-  find_pipeline(ref, [=]() { return create_pipeline(g_state.stream, config); });
-  return ref;
+  return find_pipeline(ShaderType::Stream, config, [=]() { return create_pipeline(g_state.stream, config); });
 }
 
 template <>
@@ -230,9 +250,7 @@ void push_draw_command(model::DrawData data) {
 }
 template <>
 PipelineRef pipeline_ref(model::PipelineConfig config) {
-  PipelineRef ref = xxh3_hash(config, static_cast<XXH64_hash_t>(ShaderType::Model));
-  find_pipeline(ref, [=]() { return create_pipeline(g_state.model, config); });
-  return ref;
+  return find_pipeline(ShaderType::Model, config, [=]() { return create_pipeline(g_state.model, config); });
 }
 
 static void pipeline_worker() {
@@ -301,6 +319,53 @@ void initialize() {
   g_state.moviePlayer = movie_player::construct_state();
   g_state.stream = stream::construct_state();
   g_state.model = model::construct_state();
+
+  g_serializedPipelines = {};
+  {
+    // Load serialized pipeline cache
+    std::ifstream file("pipeline_cache.bin", std::ios::in | std::ios::binary | std::ios::ate);
+    const size_t size = file.tellg();
+    file.seekg(0, std::ios::beg);
+    constexpr size_t headerSize = sizeof(g_serializedPipelineCount);
+    if (size != -1 && size > headerSize) {
+      g_serializedPipelines.append_zeroes(size - headerSize);
+      file.read(reinterpret_cast<char*>(&g_serializedPipelineCount), headerSize);
+      file.read(reinterpret_cast<char*>(g_serializedPipelines.data()), size - headerSize);
+    }
+  }
+  if (g_serializedPipelineCount > 0) {
+    size_t offset = 0;
+    while (offset < g_serializedPipelines.size()) {
+      ShaderType type = *reinterpret_cast<const ShaderType*>(g_serializedPipelines.data() + offset);
+      offset += sizeof(ShaderType);
+      u32 size = *reinterpret_cast<const u32*>(g_serializedPipelines.data() + offset);
+      offset += sizeof(u32);
+      switch (type) {
+      case ShaderType::MoviePlayer: {
+        const movie_player::PipelineConfig config =
+            *reinterpret_cast<const movie_player::PipelineConfig*>(g_serializedPipelines.data() + offset);
+        find_pipeline(
+            type, config, [=]() { return movie_player::create_pipeline(g_state.moviePlayer, config); }, false);
+      } break;
+      case ShaderType::Stream: {
+        const stream::PipelineConfig config =
+            *reinterpret_cast<const stream::PipelineConfig*>(g_serializedPipelines.data() + offset);
+        find_pipeline(
+            type, config, [=]() { return stream::create_pipeline(g_state.stream, config); }, false);
+      } break;
+      case ShaderType::Model: {
+        const model::PipelineConfig config =
+            *reinterpret_cast<const model::PipelineConfig*>(g_serializedPipelines.data() + offset);
+        find_pipeline(
+            type, config, [=]() { return model::create_pipeline(g_state.model, config); }, false);
+      } break;
+      default:
+        Log.report(logvisor::Warning, FMT_STRING("Unknown pipeline type {}"), type);
+        break;
+      }
+      offset += size;
+    }
+  }
 }
 
 void shutdown() {
@@ -310,6 +375,13 @@ void shutdown() {
     g_pipelineThread.join();
   }
 
+  {
+    // Write serialized pipelines to file
+    std::ofstream file("pipeline_cache.bin", std::ios::out | std::ios::trunc | std::ios::binary);
+    file.write(reinterpret_cast<const char*>(&g_serializedPipelineCount), sizeof(g_serializedPipelineCount));
+    file.write(reinterpret_cast<const char*>(g_serializedPipelines.data()), g_serializedPipelines.size());
+  }
+
   gx::shutdown();
 
   g_cachedBindGroups.clear();

aurora/lib/gfx/gx.hpp

@@ -179,7 +179,10 @@ struct ShaderConfig {
   bool operator==(const ShaderConfig&) const = default;
 };
 static_assert(std::has_unique_object_representations_v<ShaderConfig>);
+
+constexpr u32 GXPipelineConfigVersion = 1;
 struct PipelineConfig {
+  u32 version = GXPipelineConfigVersion;
   ShaderConfig shaderConfig;
   GX::Primitive primitive;
   GX::Compare depthFunc;
@@ -189,9 +192,10 @@ struct PipelineConfig {
   GX::LogicOp blendOp;
   u32 dstAlpha;
   bool depthCompare, depthUpdate, alphaUpdate;
-  u8 _pad;
+  u8 _pad = 0;
 };
 static_assert(std::has_unique_object_representations_v<PipelineConfig>);
+
 struct GXBindGroupLayouts {
   wgpu::BindGroupLayout uniformLayout;
   wgpu::BindGroupLayout samplerLayout;

aurora/lib/gfx/model/shader.cpp

@@ -190,7 +190,7 @@ void queue_surface(const u8* dlStart, u32 dlSize) noexcept {
 
 State construct_state() { return {}; }
 
-wgpu::RenderPipeline create_pipeline(const State& state, [[maybe_unused]] PipelineConfig config) {
+wgpu::RenderPipeline create_pipeline(const State& state, [[maybe_unused]] const PipelineConfig& config) {
   const auto info = build_shader_info(config.shaderConfig); // TODO remove
   const auto shader = build_shader(config.shaderConfig, info);
 

aurora/lib/gfx/model/shader.hpp

@@ -20,6 +20,6 @@ struct PipelineConfig : gx::PipelineConfig {};
 struct State {};
 
 State construct_state();
-wgpu::RenderPipeline create_pipeline(const State& state, [[maybe_unused]] PipelineConfig config);
+wgpu::RenderPipeline create_pipeline(const State& state, [[maybe_unused]] const PipelineConfig& config);
 void render(const State& state, const DrawData& data, const wgpu::RenderPassEncoder& pass);
 } // namespace aurora::gfx::model

aurora/lib/gfx/movie_player/shader.cpp

@@ -146,7 +146,7 @@ fn fs_main(in: VertexOutput) -> @location(0) vec4<f32> {
   };
 }
 
-wgpu::RenderPipeline create_pipeline(const State& state, [[maybe_unused]] PipelineConfig config) {
+wgpu::RenderPipeline create_pipeline(const State& state, [[maybe_unused]] const PipelineConfig& config) {
   const auto attributes =
       make_vertex_attributes(std::array{wgpu::VertexFormat::Float32x3, wgpu::VertexFormat::Float32x2});
   const std::array vertexBuffers{make_vertex_buffer_layout(sizeof(Vert), attributes)};

aurora/lib/gfx/movie_player/shader.hpp

@@ -33,7 +33,7 @@ struct alignas(4) Vert {
 };
 
 State construct_state();
-wgpu::RenderPipeline create_pipeline(const State& state, [[maybe_unused]] PipelineConfig config);
+wgpu::RenderPipeline create_pipeline(const State& state, [[maybe_unused]] const PipelineConfig& config);
 DrawData make_draw_data(const State& state, const TextureHandle& tex_y, const TextureHandle& tex_u,
                         const TextureHandle& tex_v, float h_pad, float v_pad);
 void render(const State& state, const DrawData& data, const wgpu::RenderPassEncoder& pass);

aurora/lib/gfx/stream/shader.cpp

@@ -11,7 +11,7 @@ static logvisor::Module Log("aurora::gfx::stream");
 
 using gpu::g_device;
 
-wgpu::RenderPipeline create_pipeline(const State& state, [[maybe_unused]] PipelineConfig config) {
+wgpu::RenderPipeline create_pipeline(const State& state, [[maybe_unused]] const PipelineConfig& config) {
   const auto info = build_shader_info(config.shaderConfig); // TODO remove
   const auto shader = build_shader(config.shaderConfig, info);
 

aurora/lib/gfx/stream/shader.hpp

@@ -19,6 +19,6 @@ struct PipelineConfig : public gx::PipelineConfig {};
 struct State {};
 
 State construct_state();
-wgpu::RenderPipeline create_pipeline(const State& state, [[maybe_unused]] PipelineConfig config);
+wgpu::RenderPipeline create_pipeline(const State& state, [[maybe_unused]] const PipelineConfig& config);
 void render(const State& state, const DrawData& data, const wgpu::RenderPassEncoder& pass);
 } // namespace aurora::gfx::stream