kc3-lang/angle/src/libANGLE/MemoryShaderCache.h

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• Hash : ab334105
  Author :
  Date : 2023-01-23T10:09:56
  

  BuiltInResourcesString is no longer a part of shader cache key
  
  The stringified version of `ShBuiltInResources` is poorly
  maintained and has a large overhead while computing hashes.
  Instead use the `ShBuiltInResources` blob directly.
  
  The shader object now computes and caches its key, refactor
  MemoryProgramCache to query the shader object for its key
  instead of recomputing it.
  
  Tests: EGLProgramCacheControlTest*
  Bug: angleproject:7833
  Change-Id: I67a22f9460cee10ab0f7571df7d6525b476a5a78
  Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/4185759
  Commit-Queue: mohan maiya <m.maiya@samsung.com>
  Reviewed-by: Charlie Lao <cclao@google.com>
  Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>
  

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• src/libANGLE/MemoryShaderCache.h

• //
  // Copyright 2022 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.
  //
  // MemoryShaderCache: Stores compiled shaders in memory so they don't
  //   always have to be re-compiled. Can be used in conjunction with the platform
  //   layer to warm up the cache from disk.
  
  #ifndef LIBANGLE_MEMORY_SHADER_CACHE_H_
  #define LIBANGLE_MEMORY_SHADER_CACHE_H_
  
  #include <array>
  
  #include "GLSLANG/ShaderLang.h"
  #include "common/MemoryBuffer.h"
  #include "libANGLE/BlobCache.h"
  #include "libANGLE/Error.h"
  
  namespace gl
  {
  class Context;
  class Shader;
  class ShaderState;
  class ShCompilerInstance;
  
  class MemoryShaderCache final : angle::NonCopyable
  {
    public:
      explicit MemoryShaderCache(egl::BlobCache &blobCache);
      ~MemoryShaderCache();
  
      // Helper method that serializes a shader.
      angle::Result putShader(const Context *context,
                              const egl::BlobCache::Key &shaderHash,
                              const Shader *shader);
  
      // Check the cache, and deserialize and load the shader if found. Evict existing hash if load
      // fails.
      angle::Result getShader(const Context *context,
                              Shader *shader,
                              const ShCompileOptions &compileOptions,
                              const ShCompilerInstance &compilerInstance,
                              const egl::BlobCache::Key &shaderHash);
  
      // Empty the cache.
      void clear();
  
      // Returns the maximum cache size in bytes.
      size_t maxSize() const;
  
    private:
      egl::BlobCache &mBlobCache;
  
      std::mutex mHistogramMutex;
  };
  
  }  // namespace gl
  
  #endif  // LIBANGLE_MEMORY_SHADER_CACHE_H_
  

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