kc3-lang/angle/src/libANGLE/renderer/d3d/d3d11/VertexBuffer11.cpp

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• Hash : bdc1e2a2
  Author :
  Date : 2017-05-24T14:40:27
  

  D3D11: Consolidate Buffer allocation.
  
  We now allocate and release all buffer resources from a single place,
  allowing us to allocate junk memory, clear on init, and track the
  currently allocated buffer memory.
  
  BUG=angleproject:2034
  
  Change-Id: Id60b63a7f77bc369dfc494a7587ab06c8d34a8e2
  Reviewed-on: https://chromium-review.googlesource.com/503253
  Reviewed-by: Geoff Lang <geofflang@chromium.org>
  Reviewed-by: Corentin Wallez <cwallez@chromium.org>
  Commit-Queue: Jamie Madill <jmadill@chromium.org>
  

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• src/libANGLE/renderer/d3d/d3d11/VertexBuffer11.cpp

• //
  // Copyright (c) 2013 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.
  //
  
  // VertexBuffer11.cpp: Defines the D3D11 VertexBuffer implementation.
  
  #include "libANGLE/renderer/d3d/d3d11/VertexBuffer11.h"
  
  #include "libANGLE/Buffer.h"
  #include "libANGLE/VertexAttribute.h"
  #include "libANGLE/formatutils.h"
  #include "libANGLE/renderer/d3d/d3d11/Buffer11.h"
  #include "libANGLE/renderer/d3d/d3d11/formatutils11.h"
  #include "libANGLE/renderer/d3d/d3d11/Renderer11.h"
  #include "libANGLE/renderer/d3d/d3d11/renderer11_utils.h"
  
  namespace rx
  {
  
  VertexBuffer11::VertexBuffer11(Renderer11 *const renderer)
      : mRenderer(renderer),
        mBuffer(),
        mBufferSize(0),
        mDynamicUsage(false),
        mMappedResourceData(nullptr)
  {
  }
  
  VertexBuffer11::~VertexBuffer11()
  {
      ASSERT(mMappedResourceData == nullptr);
  }
  
  gl::Error VertexBuffer11::initialize(unsigned int size, bool dynamicUsage)
  {
      mBuffer.reset();
      updateSerial();
  
      if (size > 0)
      {
          D3D11_BUFFER_DESC bufferDesc;
          bufferDesc.ByteWidth           = size;
          bufferDesc.Usage               = D3D11_USAGE_DYNAMIC;
          bufferDesc.BindFlags           = D3D11_BIND_VERTEX_BUFFER;
          bufferDesc.CPUAccessFlags      = D3D11_CPU_ACCESS_WRITE;
          bufferDesc.MiscFlags           = 0;
          bufferDesc.StructureByteStride = 0;
  
          ANGLE_TRY(mRenderer->allocateResource(bufferDesc, &mBuffer));
  
          if (dynamicUsage)
          {
              mBuffer.setDebugName("VertexBuffer11 (dynamic)");
          }
          else
          {
              mBuffer.setDebugName("VertexBuffer11 (static)");
          }
      }
  
      mBufferSize   = size;
      mDynamicUsage = dynamicUsage;
  
      return gl::NoError();
  }
  
  gl::Error VertexBuffer11::mapResource()
  {
      if (mMappedResourceData == nullptr)
      {
          ID3D11DeviceContext *dxContext = mRenderer->getDeviceContext();
  
          D3D11_MAPPED_SUBRESOURCE mappedResource;
  
          HRESULT result =
              dxContext->Map(mBuffer.get(), 0, D3D11_MAP_WRITE_NO_OVERWRITE, 0, &mappedResource);
          if (FAILED(result))
          {
              return gl::Error(GL_OUT_OF_MEMORY,
                               "Failed to map internal vertex buffer, HRESULT: 0x%08x.", result);
          }
  
          mMappedResourceData = reinterpret_cast<uint8_t *>(mappedResource.pData);
      }
  
      return gl::NoError();
  }
  
  void VertexBuffer11::hintUnmapResource()
  {
      if (mMappedResourceData != nullptr)
      {
          ID3D11DeviceContext *dxContext = mRenderer->getDeviceContext();
          dxContext->Unmap(mBuffer.get(), 0);
  
          mMappedResourceData = nullptr;
      }
  }
  
  gl::Error VertexBuffer11::storeVertexAttributes(const gl::VertexAttribute &attrib,
                                                  const gl::VertexBinding &binding,
                                                  GLenum currentValueType,
                                                  GLint start,
                                                  GLsizei count,
                                                  GLsizei instances,
                                                  unsigned int offset,
                                                  const uint8_t *sourceData)
  {
      if (!mBuffer.valid())
      {
          return gl::Error(GL_OUT_OF_MEMORY, "Internal vertex buffer is not initialized.");
      }
  
      int inputStride = static_cast<int>(ComputeVertexAttributeStride(attrib, binding));
  
      // This will map the resource if it isn't already mapped.
      ANGLE_TRY(mapResource());
  
      uint8_t *output = mMappedResourceData + offset;
  
      const uint8_t *input = sourceData;
  
      if (instances == 0 || binding.divisor == 0)
      {
          input += inputStride * start;
      }
  
      gl::VertexFormatType vertexFormatType = gl::GetVertexFormatType(attrib, currentValueType);
      const D3D_FEATURE_LEVEL featureLevel  = mRenderer->getRenderer11DeviceCaps().featureLevel;
      const d3d11::VertexFormat &vertexFormatInfo =
          d3d11::GetVertexFormatInfo(vertexFormatType, featureLevel);
      ASSERT(vertexFormatInfo.copyFunction != nullptr);
      vertexFormatInfo.copyFunction(input, inputStride, count, output);
  
      return gl::NoError();
  }
  
  unsigned int VertexBuffer11::getBufferSize() const
  {
      return mBufferSize;
  }
  
  gl::Error VertexBuffer11::setBufferSize(unsigned int size)
  {
      if (size > mBufferSize)
      {
          return initialize(size, mDynamicUsage);
      }
      else
      {
          return gl::NoError();
      }
  }
  
  gl::Error VertexBuffer11::discard()
  {
      if (!mBuffer.valid())
      {
          return gl::Error(GL_OUT_OF_MEMORY, "Internal vertex buffer is not initialized.");
      }
  
      ID3D11DeviceContext *dxContext = mRenderer->getDeviceContext();
  
      D3D11_MAPPED_SUBRESOURCE mappedResource;
      HRESULT result = dxContext->Map(mBuffer.get(), 0, D3D11_MAP_WRITE_DISCARD, 0, &mappedResource);
      if (FAILED(result))
      {
          return gl::Error(GL_OUT_OF_MEMORY,
                           "Failed to map internal buffer for discarding, HRESULT: 0x%08x", result);
      }
  
      dxContext->Unmap(mBuffer.get(), 0);
  
      return gl::NoError();
  }
  
  const d3d11::Buffer &VertexBuffer11::getBuffer() const
  {
      return mBuffer;
  }
  
  }  // namespace rx
  

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