kc3-lang/angle/src/libANGLE/renderer/d3d/d3d9/ShaderCache.h

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• Hash : f0d10f89
  Author :
  Date : 2015-03-31T12:56:52
  

  Replace non-copyable macro with a helper class.
  
  This class provides a simpler scheme for blocking default copy
  and assignment operators. It also reduces the amount of code
  needed since it's inherited to child classes. This also fixes
  the conflict between our macro and the same-named macro in
  Chromium code.
  
  BUG=angleproject:956
  
  Change-Id: If0dc72aa3f63fbc7b8fa34907418821c64c39e2f
  Reviewed-on: https://chromium-review.googlesource.com/263257
  Tested-by: Jamie Madill <jmadill@chromium.org>
  Reviewed-by: Geoff Lang <geofflang@chromium.org>
  Reviewed-by: Brandon Jones <bajones@chromium.org>
  

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• src/libANGLE/renderer/d3d/d3d9/ShaderCache.h

• //
  // Copyright (c) 2012 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.
  //
  
  // ShaderCache: Defines rx::ShaderCache, a cache of Direct3D shader objects
  // keyed by their byte code.
  
  #ifndef LIBANGLE_RENDERER_D3D_D3D9_SHADERCACHE_H_
  #define LIBANGLE_RENDERER_D3D_D3D9_SHADERCACHE_H_
  
  #include "libANGLE/Error.h"
  
  #include "common/debug.h"
  
  #include <cstddef>
  #include <unordered_map>
  #include <string>
  
  namespace rx
  {
  template <typename ShaderObject>
  class ShaderCache : angle::NonCopyable
  {
    public:
      ShaderCache() : mDevice(NULL)
      {
      }
  
      ~ShaderCache()
      {
          // Call clear while the device is still valid.
          ASSERT(mMap.empty());
      }
  
      void initialize(IDirect3DDevice9* device)
      {
          mDevice = device;
      }
  
      gl::Error create(const DWORD *function, size_t length, ShaderObject **outShaderObject)
      {
          std::string key(reinterpret_cast<const char*>(function), length);
          typename Map::iterator it = mMap.find(key);
          if (it != mMap.end())
          {
              it->second->AddRef();
              *outShaderObject = it->second;
              return gl::Error(GL_NO_ERROR);
          }
  
          ShaderObject *shader;
          HRESULT result = createShader(function, &shader);
          if (FAILED(result))
          {
              return gl::Error(GL_OUT_OF_MEMORY, "Failed to create shader, result: 0x%X.", result);
          }
  
          // Random eviction policy.
          if (mMap.size() >= kMaxMapSize)
          {
              SafeRelease(mMap.begin()->second);
              mMap.erase(mMap.begin());
          }
  
          shader->AddRef();
          mMap[key] = shader;
  
          *outShaderObject = shader;
          return gl::Error(GL_NO_ERROR);
      }
  
      void clear()
      {
          for (typename Map::iterator it = mMap.begin(); it != mMap.end(); ++it)
          {
              SafeRelease(it->second);
          }
  
          mMap.clear();
      }
  
    private:
      const static size_t kMaxMapSize = 100;
  
      HRESULT createShader(const DWORD *function, IDirect3DVertexShader9 **shader)
      {
          return mDevice->CreateVertexShader(function, shader);
      }
  
      HRESULT createShader(const DWORD *function, IDirect3DPixelShader9 **shader)
      {
          return mDevice->CreatePixelShader(function, shader);
      }
  
      typedef std::unordered_map<std::string, ShaderObject*> Map;
      Map mMap;
  
      IDirect3DDevice9 *mDevice;
  };
  
  typedef ShaderCache<IDirect3DVertexShader9> VertexShaderCache;
  typedef ShaderCache<IDirect3DPixelShader9> PixelShaderCache;
  
  }
  
  #endif   // LIBANGLE_RENDERER_D3D_D3D9_SHADERCACHE_H_
  

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