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Implement Metal parallel shader compilation (google#7205)
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| /* | ||
| * Copyright (C) 2023 The Android Open Source Project | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
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| #ifndef TNT_FILAMENT_BACKEND_METAL_METALSHADERCOMPILER_H | ||
| #define TNT_FILAMENT_BACKEND_METAL_METALSHADERCOMPILER_H | ||
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| #include "CompilerThreadPool.h" | ||
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| #include "CallbackManager.h" | ||
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| #include <backend/CallbackHandler.h> | ||
| #include <backend/Program.h> | ||
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| #include <utils/CString.h> | ||
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| #include <Metal/Metal.h> | ||
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| #include <array> | ||
| #include <memory> | ||
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| namespace filament::backend { | ||
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| class MetalDriver; | ||
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| class MetalShaderCompiler { | ||
| struct MetalProgramToken; | ||
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| public: | ||
| class MetalFunctionBundle { | ||
| public: | ||
| MetalFunctionBundle() = default; | ||
| MetalFunctionBundle(id<MTLFunction> fragment, id<MTLFunction> vertex) | ||
| : functions{fragment, vertex} { | ||
| assert_invariant(fragment && vertex); | ||
| assert_invariant(fragment.functionType == MTLFunctionTypeFragment); | ||
| assert_invariant(vertex.functionType == MTLFunctionTypeVertex); | ||
| } | ||
| explicit MetalFunctionBundle(id<MTLFunction> compute) : functions{compute, nil} { | ||
| assert_invariant(compute); | ||
| assert_invariant(compute.functionType == MTLFunctionTypeKernel); | ||
| } | ||
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| std::pair<id<MTLFunction>, id<MTLFunction>> getRasterFunctions() const noexcept { | ||
| assert_invariant(functions[0].functionType == MTLFunctionTypeFragment); | ||
| assert_invariant(functions[1].functionType == MTLFunctionTypeVertex); | ||
| return {functions[0], functions[1]}; | ||
| } | ||
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| id<MTLFunction> getComputeFunction() const noexcept { | ||
| assert_invariant(functions[0].functionType == MTLFunctionTypeKernel); | ||
| return functions[0]; | ||
| } | ||
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| explicit operator bool() const { return functions[0] != nil; } | ||
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| private: | ||
| // Can hold two functions, either: | ||
| // - fragment and vertex (for rasterization pipelines) | ||
| // - compute (for compute pipelines) | ||
| id<MTLFunction> functions[2] = {nil, nil}; | ||
| }; | ||
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| using program_token_t = std::shared_ptr<MetalProgramToken>; | ||
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| explicit MetalShaderCompiler(id<MTLDevice> device, MetalDriver& driver); | ||
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| MetalShaderCompiler(MetalShaderCompiler const& rhs) = delete; | ||
| MetalShaderCompiler(MetalShaderCompiler&& rhs) = delete; | ||
| MetalShaderCompiler& operator=(MetalShaderCompiler const& rhs) = delete; | ||
| MetalShaderCompiler& operator=(MetalShaderCompiler&& rhs) = delete; | ||
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| void init() noexcept; | ||
| void terminate() noexcept; | ||
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| // Creates a program asynchronously | ||
| program_token_t createProgram(utils::CString const& name, Program&& program); | ||
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| // Returns the functions, blocking if necessary. The Token is destroyed and becomes invalid. | ||
| MetalFunctionBundle getProgram(program_token_t& token); | ||
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| // Destroys a valid token and all associated resources. Used to "cancel" a program compilation. | ||
| static void terminate(program_token_t& token); | ||
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| void notifyWhenAllProgramsAreReady( | ||
| CallbackHandler* handler, CallbackHandler::Callback callback, void* user); | ||
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| private: | ||
| static MetalFunctionBundle compileProgram(const Program& program, id<MTLDevice> device); | ||
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| CompilerThreadPool mCompilerThreadPool; | ||
| id<MTLDevice> mDevice; | ||
| CallbackManager mCallbackManager; | ||
| }; | ||
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| } // namespace filament::backend | ||
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| #endif // TNT_FILAMENT_BACKEND_METAL_METALSHADERCOMPILER_H |
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