kc3-lang/angle/src/libANGLE/renderer/ShaderImpl.cpp

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• Hash : b0e15ee4
  Author :
  Date : 2021-12-28T20:37:33
  

  Decide GL_KHR_parallel_shader_compile in backends
  
  GL_KHR_parallel_shader_compile was previously being enabled
  unconditionally in the front end. However, some backends (Vulkan)
  perform worse with parallel shader compilation. This CL moves the
  decision of enabling GL_KHR_parallel_shader_compile to the backends.
  
  To support single-threaded shader compilation without affecting the
  generic worker thread pool, Context::mSingleThreadPool is added to own
  the single-threaded WorkerThreadPool and can be returned by the new
  function Context::getShaderCompileThreadPool(). Otherwise, if the
  extension is enabled, the (renamed) Context::mMultiThreadPool is
  returned.
  
  Bug: angleproject:6748
  Change-Id: Ic8d3a183f397608f3002a05480deb976dfe44792
  Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/3360337
  Reviewed-by: Jamie Madill <jmadill@chromium.org>
  Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>
  Commit-Queue: Tim Van Patten <timvp@google.com>
  

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• src/libANGLE/renderer/ShaderImpl.cpp

• //
  // Copyright 2019 The ANGLE Project Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  //
  
  // ShaderImpl.cpp: Implementation methods of ShaderImpl
  
  #include "libANGLE/renderer/ShaderImpl.h"
  
  #include "libANGLE/Context.h"
  #include "libANGLE/trace.h"
  
  namespace rx
  {
  
  WaitableCompileEvent::WaitableCompileEvent(std::shared_ptr<angle::WaitableEvent> waitableEvent)
      : mWaitableEvent(waitableEvent)
  {}
  
  WaitableCompileEvent::~WaitableCompileEvent()
  {
      mWaitableEvent.reset();
  }
  
  void WaitableCompileEvent::wait()
  {
      mWaitableEvent->wait();
  }
  
  bool WaitableCompileEvent::isReady()
  {
      return mWaitableEvent->isReady();
  }
  
  const std::string &WaitableCompileEvent::getInfoLog()
  {
      return mInfoLog;
  }
  
  class TranslateTask : public angle::Closure
  {
    public:
      TranslateTask(ShHandle handle, ShCompileOptions options, const std::string &source)
          : mHandle(handle), mOptions(options), mSource(source), mResult(false)
      {}
  
      void operator()() override
      {
          ANGLE_TRACE_EVENT1("gpu.angle", "TranslateTask::run", "source", mSource);
          const char *source = mSource.c_str();
          mResult            = sh::Compile(mHandle, &source, 1, mOptions);
      }
  
      bool getResult() { return mResult; }
  
      ShHandle getHandle() { return mHandle; }
  
    private:
      ShHandle mHandle;
      ShCompileOptions mOptions;
      std::string mSource;
      bool mResult;
  };
  
  class WaitableCompileEventImpl final : public WaitableCompileEvent
  {
    public:
      WaitableCompileEventImpl(std::shared_ptr<angle::WaitableEvent> waitableEvent,
                               std::shared_ptr<TranslateTask> translateTask)
          : WaitableCompileEvent(waitableEvent), mTranslateTask(translateTask)
      {}
  
      bool getResult() override { return mTranslateTask->getResult(); }
  
      bool postTranslate(std::string *infoLog) override { return true; }
  
    private:
      std::shared_ptr<TranslateTask> mTranslateTask;
  };
  
  std::shared_ptr<WaitableCompileEvent> ShaderImpl::compileImpl(
      const gl::Context *context,
      gl::ShCompilerInstance *compilerInstance,
      const std::string &source,
      ShCompileOptions compileOptions)
  {
  #if defined(ANGLE_ENABLE_ASSERTS)
      compileOptions |= SH_VALIDATE_AST;
  #endif
  
      auto workerThreadPool = context->getShaderCompileThreadPool();
      auto translateTask =
          std::make_shared<TranslateTask>(compilerInstance->getHandle(), compileOptions, source);
  
      return std::make_shared<WaitableCompileEventImpl>(
          angle::WorkerThreadPool::PostWorkerTask(workerThreadPool, translateTask), translateTask);
  }
  
  }  // namespace rx
  

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