kc3-lang/angle/src/libANGLE/renderer/d3d/d3d11/Buffer11.h

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• Hash : 520c4ae2
  Author :
  Date : 2015-05-05T13:12:36
  

  Add a Buffer::getIndexRange function.
  
  Instead of exposing the index range cache, add a more generic method that
  allows the buffers to handle their own caching of index ranges.
  BufferImpl::getData can be hard to implement for BufferGL because there
  isn't a way to tell the buffer to unmap and glGetBufferSubData can be very
  expensive, requiring an extra copy of the data.
  
  BUG=angleproject:881
  
  Change-Id: Idec645219056132e0d72a410fbe7b971fa02c9e9
  Reviewed-on: https://chromium-review.googlesource.com/261892
  Reviewed-by: Jamie Madill <jmadill@chromium.org>
  Reviewed-by: Olli Etuaho <oetuaho@nvidia.com>
  Tested-by: Geoff Lang <geofflang@chromium.org>
  

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• src/libANGLE/renderer/d3d/d3d11/Buffer11.h

• //
  // Copyright 2014 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.
  //
  
  // Buffer11.h: Defines the rx::Buffer11 class which implements rx::BufferImpl via rx::BufferD3D.
  
  #ifndef LIBANGLE_RENDERER_D3D_D3D11_BUFFER11_H_
  #define LIBANGLE_RENDERER_D3D_D3D11_BUFFER11_H_
  
  #include <map>
  
  #include "libANGLE/angletypes.h"
  #include "libANGLE/renderer/d3d/BufferD3D.h"
  
  namespace rx
  {
  class Renderer11;
  
  enum BufferUsage
  {
      BUFFER_USAGE_STAGING,
      BUFFER_USAGE_VERTEX_OR_TRANSFORM_FEEDBACK,
      BUFFER_USAGE_INDEX,
      BUFFER_USAGE_PIXEL_UNPACK,
      BUFFER_USAGE_PIXEL_PACK,
      BUFFER_USAGE_UNIFORM,
      BUFFER_USAGE_SYSTEM_MEMORY,
  };
  
  struct PackPixelsParams
  {
      PackPixelsParams();
      PackPixelsParams(const gl::Rectangle &area, GLenum format, GLenum type, GLuint outputPitch,
                       const gl::PixelPackState &pack, ptrdiff_t offset);
  
      gl::Rectangle area;
      GLenum format;
      GLenum type;
      GLuint outputPitch;
      gl::Buffer *packBuffer;
      gl::PixelPackState pack;
      ptrdiff_t offset;
  };
  
  typedef size_t DataRevision;
  
  class Buffer11 : public BufferD3D
  {
    public:
      Buffer11(Renderer11 *renderer);
      virtual ~Buffer11();
  
      ID3D11Buffer *getBuffer(BufferUsage usage);
      ID3D11Buffer *getConstantBufferRange(GLintptr offset, GLsizeiptr size);
      ID3D11ShaderResourceView *getSRV(DXGI_FORMAT srvFormat);
      bool isMapped() const { return mMappedStorage != NULL; }
      gl::Error packPixels(ID3D11Texture2D *srcTexure, UINT srcSubresource, const PackPixelsParams &params);
  
      // BufferD3D implementation
      virtual size_t getSize() const { return mSize; }
      virtual bool supportsDirectBinding() const;
      gl::Error getData(const uint8_t **outData) override;
  
      // BufferImpl implementation
      virtual gl::Error setData(const void* data, size_t size, GLenum usage);
      virtual gl::Error setSubData(const void* data, size_t size, size_t offset);
      virtual gl::Error copySubData(BufferImpl* source, GLintptr sourceOffset, GLintptr destOffset, GLsizeiptr size);
      virtual gl::Error map(GLenum access, GLvoid **mapPtr);
      virtual gl::Error mapRange(size_t offset, size_t length, GLbitfield access, GLvoid **mapPtr);
      virtual gl::Error unmap(GLboolean *result);
      virtual void markTransformFeedbackUsage();
  
    private:
      class BufferStorage;
      class NativeStorage;
      class PackStorage;
      class SystemMemoryStorage;
  
      Renderer11 *mRenderer;
      size_t mSize;
  
      BufferStorage *mMappedStorage;
  
      std::map<BufferUsage, BufferStorage*> mBufferStorages;
  
      struct ConstantBufferCacheEntry
      {
          ConstantBufferCacheEntry() : storage(nullptr), lruCount(0) { }
  
          BufferStorage *storage;
          unsigned int lruCount;
      };
  
      // Cache of D3D11 constant buffer for specific ranges of buffer data.
      // This is used to emulate UBO ranges on 11.0 devices.
      // Constant buffers are indexed by there start offset.
      typedef std::map<GLintptr /*offset*/, ConstantBufferCacheEntry> ConstantBufferCache;
      ConstantBufferCache mConstantBufferRangeStoragesCache;
      size_t mConstantBufferStorageAdditionalSize;
      unsigned int mMaxConstantBufferLruCount;
  
      typedef std::pair<ID3D11Buffer *, ID3D11ShaderResourceView *> BufferSRVPair;
      std::map<DXGI_FORMAT, BufferSRVPair> mBufferResourceViews;
  
      unsigned int mReadUsageCount;
      bool mHasSystemMemoryStorage;
  
      void markBufferUsage();
      NativeStorage *getStagingStorage();
      PackStorage *getPackStorage();
      gl::Error getSystemMemoryStorage(SystemMemoryStorage **storageOut);
  
      void updateBufferStorage(BufferStorage *storage, size_t sourceOffset, size_t storageSize);
      BufferStorage *getBufferStorage(BufferUsage usage);
      BufferStorage *getLatestBufferStorage() const;
  
      BufferStorage *getContantBufferRangeStorage(GLintptr offset, GLsizeiptr size);
  };
  
  }
  
  #endif // LIBANGLE_RENDERER_D3D_D3D11_BUFFER11_H_
  

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