kc3-lang/angle/src/libANGLE/renderer/d3d/d3d11/IndexBuffer11.cpp

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• Hash : 9d737966
  Author :
  Date : 2019-08-14T12:25:12
  

  Standardize copyright notices to project style
  
  For all "ANGLE Project" copyrights, standardize to the format specified
  by the style guide. Changes:
  - "Copyright (c)" and "Copyright(c)" changed to just "Copyright".
  - Removed the second half of date ranges ("Y1Y1-Y2Y2"->"Y1Y1").
  - Fixed a small number of files that had no copyright date using the
    initial commit year from the version control history.
  - Fixed one instance of copyright being "The ANGLE Project" rather than
    "The ANGLE Project Authors"
  
  These changes are applied both to the copyright of source file, and
  where applicable to copyright statements that are generated by
  templates.
  
  BUG=angleproject:3811
  
  Change-Id: I973dd65e4ef9deeba232d5be74c768256a0eb2e5
  Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1754397
  Commit-Queue: Jamie Madill <jmadill@chromium.org>
  Reviewed-by: Jamie Madill <jmadill@chromium.org>
  

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• src/libANGLE/renderer/d3d/d3d11/IndexBuffer11.cpp

• //
  // Copyright 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.
  //
  
  // IndexBuffer11.cpp: Defines the D3D11 IndexBuffer implementation.
  
  #include "libANGLE/renderer/d3d/d3d11/IndexBuffer11.h"
  
  #include "libANGLE/Context.h"
  #include "libANGLE/renderer/d3d/d3d11/Context11.h"
  #include "libANGLE/renderer/d3d/d3d11/Renderer11.h"
  #include "libANGLE/renderer/d3d/d3d11/renderer11_utils.h"
  
  namespace rx
  {
  
  IndexBuffer11::IndexBuffer11(Renderer11 *const renderer)
      : mRenderer(renderer),
        mBuffer(),
        mBufferSize(0),
        mIndexType(gl::DrawElementsType::InvalidEnum),
        mDynamicUsage(false)
  {}
  
  IndexBuffer11::~IndexBuffer11() {}
  
  angle::Result IndexBuffer11::initialize(const gl::Context *context,
                                          unsigned int bufferSize,
                                          gl::DrawElementsType indexType,
                                          bool dynamic)
  {
      mBuffer.reset();
  
      updateSerial();
  
      if (bufferSize > 0)
      {
          D3D11_BUFFER_DESC bufferDesc;
          bufferDesc.ByteWidth           = bufferSize;
          bufferDesc.Usage               = D3D11_USAGE_DYNAMIC;
          bufferDesc.BindFlags           = D3D11_BIND_INDEX_BUFFER;
          bufferDesc.CPUAccessFlags      = D3D11_CPU_ACCESS_WRITE;
          bufferDesc.MiscFlags           = 0;
          bufferDesc.StructureByteStride = 0;
  
          ANGLE_TRY(mRenderer->allocateResource(GetImplAs<Context11>(context), bufferDesc, &mBuffer));
  
          if (dynamic)
          {
              mBuffer.setDebugName("IndexBuffer11 (dynamic)");
          }
          else
          {
              mBuffer.setDebugName("IndexBuffer11 (static)");
          }
      }
  
      mBufferSize   = bufferSize;
      mIndexType    = indexType;
      mDynamicUsage = dynamic;
  
      return angle::Result::Continue;
  }
  
  angle::Result IndexBuffer11::mapBuffer(const gl::Context *context,
                                         unsigned int offset,
                                         unsigned int size,
                                         void **outMappedMemory)
  {
      Context11 *context11 = GetImplAs<Context11>(context);
      ANGLE_CHECK_HR(context11, mBuffer.valid(), "Internal index buffer is not initialized.",
                     E_OUTOFMEMORY);
  
      // Check for integer overflows and out-out-bounds map requests
      bool outOfBounds = (offset + size < offset || offset + size > mBufferSize);
      ANGLE_CHECK_HR(context11, !outOfBounds, "Index buffer map range is not inside the buffer.",
                     E_OUTOFMEMORY);
  
      D3D11_MAPPED_SUBRESOURCE mappedResource;
      ANGLE_TRY(mRenderer->mapResource(context, mBuffer.get(), 0, D3D11_MAP_WRITE_NO_OVERWRITE, 0,
                                       &mappedResource));
  
      *outMappedMemory = static_cast<char *>(mappedResource.pData) + offset;
      return angle::Result::Continue;
  }
  
  angle::Result IndexBuffer11::unmapBuffer(const gl::Context *context)
  {
      Context11 *context11 = GetImplAs<Context11>(context);
      ANGLE_CHECK_HR(context11, mBuffer.valid(), "Internal index buffer is not initialized.",
                     E_OUTOFMEMORY);
  
      ID3D11DeviceContext *dxContext = mRenderer->getDeviceContext();
      dxContext->Unmap(mBuffer.get(), 0);
      return angle::Result::Continue;
  }
  
  gl::DrawElementsType IndexBuffer11::getIndexType() const
  {
      return mIndexType;
  }
  
  unsigned int IndexBuffer11::getBufferSize() const
  {
      return mBufferSize;
  }
  
  angle::Result IndexBuffer11::setSize(const gl::Context *context,
                                       unsigned int bufferSize,
                                       gl::DrawElementsType indexType)
  {
      if (bufferSize > mBufferSize || indexType != mIndexType)
      {
          return initialize(context, bufferSize, indexType, mDynamicUsage);
      }
  
      return angle::Result::Continue;
  }
  
  angle::Result IndexBuffer11::discard(const gl::Context *context)
  {
      Context11 *context11 = GetImplAs<Context11>(context);
      ANGLE_CHECK_HR(context11, mBuffer.valid(), "Internal index buffer is not initialized.",
                     E_OUTOFMEMORY);
  
      ID3D11DeviceContext *dxContext = mRenderer->getDeviceContext();
  
      D3D11_MAPPED_SUBRESOURCE mappedResource;
      ANGLE_TRY(mRenderer->mapResource(context, mBuffer.get(), 0, D3D11_MAP_WRITE_DISCARD, 0,
                                       &mappedResource));
  
      dxContext->Unmap(mBuffer.get(), 0);
  
      return angle::Result::Continue;
  }
  
  DXGI_FORMAT IndexBuffer11::getIndexFormat() const
  {
      switch (mIndexType)
      {
          case gl::DrawElementsType::UnsignedByte:
              return DXGI_FORMAT_R16_UINT;
          case gl::DrawElementsType::UnsignedShort:
              return DXGI_FORMAT_R16_UINT;
          case gl::DrawElementsType::UnsignedInt:
              return DXGI_FORMAT_R32_UINT;
          default:
              UNREACHABLE();
              return DXGI_FORMAT_UNKNOWN;
      }
  }
  
  const d3d11::Buffer &IndexBuffer11::getBuffer() const
  {
      return mBuffer;
  }
  
  }  // namespace rx
  

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