kc3-lang/angle/src/libGLESv2/renderer/VertexBuffer11.cpp

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• Hash : 49ec992d
  Author :
  Date : 2013-05-30T00:16:38
  

  Moved the defines of constant float values into more visible constants.
  
  TRAC #23048
  
  Signed-off-by: Jamie Madill
  Signed-off-by: Shannon Woods
  Author: Geoff Lang
  
  git-svn-id: https://angleproject.googlecode.com/svn/branches/es3proto@2377 736b8ea6-26fd-11df-bfd4-992fa37f6226
  

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• src/libGLESv2/renderer/VertexBuffer11.cpp

• #include "precompiled.h"
  //
  // 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 "libGLESv2/renderer/VertexBuffer11.h"
  #include "libGLESv2/renderer/BufferStorage.h"
  
  #include "libGLESv2/Buffer.h"
  #include "libGLESv2/renderer/Renderer11.h"
  #include "libGLESv2/Context.h"
  
  namespace rx
  {
  
  VertexBuffer11::VertexBuffer11(rx::Renderer11 *const renderer) : mRenderer(renderer)
  {
      mBuffer = NULL;
      mBufferSize = 0;
      mDynamicUsage = false;
  }
  
  VertexBuffer11::~VertexBuffer11()
  {
      if (mBuffer)
      {
          mBuffer->Release();
          mBuffer = NULL;
      }
  }
  
  bool VertexBuffer11::initialize(unsigned int size, bool dynamicUsage)
  {
      if (mBuffer)
      {
          mBuffer->Release();
          mBuffer = NULL;
      }
  
      updateSerial();
  
      if (size > 0)
      {
          ID3D11Device* dxDevice = mRenderer->getDevice();
  
          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;
  
          HRESULT result = dxDevice->CreateBuffer(&bufferDesc, NULL, &mBuffer);
          if (FAILED(result))
          {
              return false;
          }
      }
  
      mBufferSize = size;
      mDynamicUsage = dynamicUsage;
      return true;
  }
  
  VertexBuffer11 *VertexBuffer11::makeVertexBuffer11(VertexBuffer *vetexBuffer)
  {
      ASSERT(HAS_DYNAMIC_TYPE(VertexBuffer11*, vetexBuffer));
      return static_cast<VertexBuffer11*>(vetexBuffer);
  }
  
  bool VertexBuffer11::storeVertexAttributes(const gl::VertexAttribute &attrib, GLint start, GLsizei count,
                                             GLsizei instances, unsigned int offset)
  {
      if (mBuffer)
      {
          gl::Buffer *buffer = attrib.mBoundBuffer.get();
  
          int inputStride = attrib.stride();
          const VertexConverter &converter = getVertexConversion(attrib);
  
          ID3D11DeviceContext *dxContext = mRenderer->getDeviceContext();
  
          D3D11_MAPPED_SUBRESOURCE mappedResource;
          HRESULT result = dxContext->Map(mBuffer, 0, D3D11_MAP_WRITE_NO_OVERWRITE, 0, &mappedResource);
          if (FAILED(result))
          {
              ERR("Vertex buffer map failed with error 0x%08x", result);
              return false;
          }
  
          char* output = reinterpret_cast<char*>(mappedResource.pData) + offset;
  
          const char *input = NULL;
          if (attrib.mArrayEnabled)
          {
              if (buffer)
              {
                  BufferStorage *storage = buffer->getStorage();
                  input = static_cast<const char*>(storage->getData()) + static_cast<int>(attrib.mOffset);
              }
              else
              {
                  input = static_cast<const char*>(attrib.mPointer);
              }
          }
          else
          {
              input = reinterpret_cast<const char*>(attrib.mCurrentValue.FloatValues);
          }
  
          if (instances == 0 || attrib.mDivisor == 0)
          {
              input += inputStride * start;
          }
  
          ASSERT(converter.conversionFunc != NULL);
          converter.conversionFunc(input, inputStride, count, output);
  
          dxContext->Unmap(mBuffer, 0);
  
          return true;
      }
      else
      {
          ERR("Vertex buffer not initialized.");
          return false;
      }
  }
  
  unsigned int VertexBuffer11::getSpaceRequired(const gl::VertexAttribute &attrib, GLsizei count,
                                                GLsizei instances) const
  {
      unsigned int elementSize = getVertexConversion(attrib).outputElementSize;
  
      if (attrib.mArrayEnabled)
      {
          if (instances == 0 || attrib.mDivisor == 0)
          {
              return elementSize * count;
          }
          else
          {
              return elementSize * ((instances + attrib.mDivisor - 1) / attrib.mDivisor);
          }
      }
      else
      {
          return elementSize * 4;
      }
  }
  
  bool VertexBuffer11::requiresConversion(const gl::VertexAttribute &attrib) const
  {
      return !getVertexConversion(attrib).identity;
  }
  
  unsigned int VertexBuffer11::getBufferSize() const
  {
      return mBufferSize;
  }
  
  bool VertexBuffer11::setBufferSize(unsigned int size)
  {
      if (size > mBufferSize)
      {
          return initialize(size, mDynamicUsage);
      }
      else
      {
          return true;
      }
  }
  
  bool VertexBuffer11::discard()
  {
      if (mBuffer)
      {
          ID3D11DeviceContext *dxContext = mRenderer->getDeviceContext();
  
          D3D11_MAPPED_SUBRESOURCE mappedResource;
          HRESULT result = dxContext->Map(mBuffer, 0, D3D11_MAP_WRITE_DISCARD, 0, &mappedResource);
          if (FAILED(result))
          {
              ERR("Vertex buffer map failed with error 0x%08x", result);
              return false;
          }
  
          dxContext->Unmap(mBuffer, 0);
  
          return true;
      }
      else
      {
          ERR("Vertex buffer not initialized.");
          return false;
      }
  }
  
  unsigned int VertexBuffer11::getVertexSize(const gl::VertexAttribute &attrib) const
  {
      return getVertexConversion(attrib).outputElementSize;
  }
  
  DXGI_FORMAT VertexBuffer11::getDXGIFormat(const gl::VertexAttribute &attrib) const
  {
      return getVertexConversion(attrib).dxgiFormat;
  }
  
  ID3D11Buffer *VertexBuffer11::getBuffer() const
  {
      return mBuffer;
  }
  
  template <typename T, unsigned int componentCount, bool widen, unsigned int defaultValueBits>
  static void copyVertexData(const void *input, unsigned int stride, unsigned int count, void *output)
  {
      const unsigned int attribSize = sizeof(T) * componentCount;
  
      const unsigned int defaultBits = defaultValueBits;
      const T defaultValue = *reinterpret_cast<const T*>(&defaultBits);
  
      if (attribSize == stride && !widen)
      {
          memcpy(output, input, count * attribSize);
      }
      else
      {
          unsigned int outputStride = widen ? 4 : componentCount;
  
          for (unsigned int i = 0; i < count; i++)
          {
              const T *offsetInput = reinterpret_cast<const T*>(reinterpret_cast<const char*>(input) + i * stride);
              T *offsetOutput = reinterpret_cast<T*>(output) + i * outputStride;
  
              for (unsigned int j = 0; j < componentCount; j++)
              {
                  offsetOutput[j] = offsetInput[j];
              }
  
              if (widen)
              {
                  offsetOutput[3] = defaultValue;
              }
          }
      }
  }
  
  template <unsigned int componentCount>
  static void copyFixedVertexData(const void* input, unsigned int stride, unsigned int count, void* output)
  {
      static const float divisor = 1.0f / (1 << 16);
  
      for (unsigned int i = 0; i < count; i++)
      {
          const GLfixed* offsetInput = reinterpret_cast<const GLfixed*>(reinterpret_cast<const char*>(input) + stride * i);
          float* offsetOutput = reinterpret_cast<float*>(output) + i * componentCount;
  
          for (unsigned int j = 0; j < componentCount; j++)
          {
              offsetOutput[j] = static_cast<float>(offsetInput[j]) * divisor;
          }
      }
  }
  
  template <typename T, unsigned int componentCount, bool normalized>
  static void copyToFloatVertexData(const void* input, unsigned int stride, unsigned int count, void* output)
  {
      typedef std::numeric_limits<T> NL;
  
      for (unsigned int i = 0; i < count; i++)
      {
          const T *offsetInput = reinterpret_cast<const T*>(reinterpret_cast<const char*>(input) + stride * i);
          float *offsetOutput = reinterpret_cast<float*>(output) + i * componentCount;
  
          for (unsigned int j = 0; j < componentCount; j++)
          {
              if (normalized)
              {
                  if (NL::is_signed)
                  {
                      const float divisor = 1.0f / (2 * static_cast<float>(NL::max()) + 1);
                      offsetOutput[j] = (2 * static_cast<float>(offsetInput[j]) + 1) * divisor;
                  }
                  else
                  {
                      offsetOutput[j] =  static_cast<float>(offsetInput[j]) / NL::max();
                  }
              }
              else
              {
                  offsetOutput[j] =  static_cast<float>(offsetInput[j]);
              }
          }
      }
  }
  
  static void copyPackedUnsignedVertexData(const void* input, unsigned int stride, unsigned int count, void* output)
  {
      const unsigned int attribSize = 4;
  
      if (attribSize == stride)
      {
          memcpy(output, input, count * attribSize);
      }
      else
      {
          for (unsigned int i = 0; i < count; i++)
          {
              const GLuint *offsetInput = reinterpret_cast<const GLuint*>(reinterpret_cast<const char*>(input) + (i * stride));
              GLuint *offsetOutput = reinterpret_cast<GLuint*>(output) + (i * attribSize);
  
              offsetOutput[i] = offsetInput[i];
          }
      }
  }
  
  template <bool isSigned, bool normalized, bool toFloat>
  static inline void copyPackedRGB(unsigned int data, void *output)
  {
      const unsigned int rgbSignMask = 0x200;       // 1 set at the 9 bit
      const unsigned int negativeMask = 0xFFFFFC00; // All bits from 10 to 31 set to 1
  
      if (toFloat)
      {
          GLfloat *floatOutput = reinterpret_cast<GLfloat*>(output);
          if (isSigned)
          {
              GLfloat finalValue = 0;
              if (data & rgbSignMask)
              {
                  int negativeNumber = data | negativeMask;
                  finalValue = static_cast<GLfloat>(negativeNumber);
              }
              else
              {
                  finalValue = static_cast<GLfloat>(data);
              }
  
              if (normalized)
              {
                  const int maxValue = 0x1FF;      // 1 set in bits 0 through 8
                  const int minValue = 0xFFFFFE01; // Inverse of maxValue
  
                  // A 10-bit two's complement number has the possibility of being minValue - 1 but
                  // OpenGL's normalization rules dictate that it should be clamped to minValue in this
                  // case.
                  if (finalValue < minValue)
                  {
                      finalValue = minValue;
                  }
  
                  const int halfRange = (maxValue - minValue) >> 1;
                  *floatOutput = ((finalValue - minValue) / halfRange) - 1.0f;
              }
              else
              {
                  *floatOutput = finalValue;
              }
          }
          else
          {
              if (normalized)
              {
                  const unsigned int maxValue = 0x3FF; // 1 set in bits 0 through 9
                  *floatOutput = static_cast<GLfloat>(data) / static_cast<GLfloat>(maxValue);
              }
              else
              {
                  *floatOutput = static_cast<GLfloat>(data);
              }
          }
      }
      else
      {
          if (isSigned)
          {
              GLshort *intOutput = reinterpret_cast<GLshort*>(output);
  
              if (data & rgbSignMask)
              {
                  *intOutput = data | negativeMask;
              }
              else
              {
                  *intOutput = data;
              }
          }
          else
          {
              GLushort *uintOutput = reinterpret_cast<GLushort*>(output);
              *uintOutput = data;
          }
      }
  }
  
  template <bool isSigned, bool normalized, bool toFloat>
  static inline void copyPackedAlpha(unsigned int data, void *output)
  {
      if (toFloat)
      {
          GLfloat *floatOutput = reinterpret_cast<GLfloat*>(output);
          if (isSigned)
          {
              if (normalized)
              {
                  switch (data)
                  {
                    case 0x0: *floatOutput =  0.0f; break;
                    case 0x1: *floatOutput =  1.0f; break;
                    case 0x2: *floatOutput = -1.0f; break;
                    case 0x3: *floatOutput = -1.0f; break;
                    default: UNREACHABLE();
                  }
              }
              else
              {
                  switch (data)
                  {
                    case 0x0: *floatOutput =  0.0f; break;
                    case 0x1: *floatOutput =  1.0f; break;
                    case 0x2: *floatOutput = -2.0f; break;
                    case 0x3: *floatOutput = -1.0f; break;
                    default: UNREACHABLE();
                  }
              }
          }
          else
          {
              if (normalized)
              {
                  switch (data)
                  {
                    case 0x0: *floatOutput = 0.0f / 3.0f; break;
                    case 0x1: *floatOutput = 1.0f / 3.0f; break;
                    case 0x2: *floatOutput = 2.0f / 3.0f; break;
                    case 0x3: *floatOutput = 3.0f / 3.0f; break;
                    default: UNREACHABLE();
                  }
              }
              else
              {
                  switch (data)
                  {
                    case 0x0: *floatOutput = 0.0f; break;
                    case 0x1: *floatOutput = 1.0f; break;
                    case 0x2: *floatOutput = 2.0f; break;
                    case 0x3: *floatOutput = 3.0f; break;
                    default: UNREACHABLE();
                  }
              }
          }
      }
      else
      {
          if (isSigned)
          {
              GLshort *intOutput = reinterpret_cast<GLshort*>(output);
              switch (data)
              {
                case 0x0: *intOutput =  0; break;
                case 0x1: *intOutput =  1; break;
                case 0x2: *intOutput = -2; break;
                case 0x3: *intOutput = -1; break;
                default: UNREACHABLE();
              }
          }
          else
          {
              GLushort *uintOutput = reinterpret_cast<GLushort*>(output);
              switch (data)
              {
                case 0x0: *uintOutput = 0; break;
                case 0x1: *uintOutput = 1; break;
                case 0x2: *uintOutput = 2; break;
                case 0x3: *uintOutput = 3; break;
                default: UNREACHABLE();
              }
          }
      }
  }
  
  template <bool isSigned, bool normalized, bool toFloat>
  static void copyPackedVertexData(const void* input, unsigned int stride, unsigned int count, void* output)
  {
      const unsigned int outputComponentSize = toFloat ? 4 : 2;
      const unsigned int componentCount = 4;
  
      const unsigned int rgbMask = 0x3FF; // 1 set in bits 0 through 9
      const unsigned int redShift = 0;    // red is bits 0 through 9
      const unsigned int greenShift = 10; // green is bits 10 through 19
      const unsigned int blueShift = 20;  // blue is bits 20 through 29
  
      const unsigned int alphaMask = 0x3; // 1 set in bits 0 and 1
      const unsigned int alphaShift = 30; // Alpha is the 30 and 31 bits
  
      for (unsigned int i = 0; i < count; i++)
      {
          GLuint packedValue = *reinterpret_cast<const GLuint*>(reinterpret_cast<const char*>(input) + (i * stride));
          GLbyte *offsetOutput = reinterpret_cast<GLbyte*>(output) + (i * outputComponentSize * componentCount);
  
          copyPackedRGB<isSigned, normalized, toFloat>(  (packedValue >> redShift) & rgbMask,     offsetOutput + (0 * outputComponentSize));
          copyPackedRGB<isSigned, normalized, toFloat>(  (packedValue >> greenShift) & rgbMask,   offsetOutput + (1 * outputComponentSize));
          copyPackedRGB<isSigned, normalized, toFloat>(  (packedValue >> blueShift) & rgbMask,    offsetOutput + (2 * outputComponentSize));
          copyPackedAlpha<isSigned, normalized, toFloat>((packedValue >> alphaShift) & alphaMask, offsetOutput + (3* outputComponentSize));
      }
  }
  
  const VertexBuffer11::VertexConverter VertexBuffer11::mFloatVertexTranslations[NUM_GL_FLOAT_VERTEX_ATTRIB_TYPES][2][4] =
  {
      { // GL_BYTE
          { // unnormalized
              { &copyToFloatVertexData<GLbyte, 1, false>, false, DXGI_FORMAT_R32_FLOAT, 4 },
              { &copyToFloatVertexData<GLbyte, 2, false>, false, DXGI_FORMAT_R32G32_FLOAT, 8 },
              { &copyToFloatVertexData<GLbyte, 3, false>, false, DXGI_FORMAT_R32G32B32_FLOAT, 12 },
              { &copyToFloatVertexData<GLbyte, 4, false>, false, DXGI_FORMAT_R32G32B32A32_FLOAT, 16 },
          },
          { // normalized
              { &copyVertexData<GLbyte, 1, false, INT8_MAX>, true, DXGI_FORMAT_R8_SNORM, 1 },
              { &copyVertexData<GLbyte, 2, false, INT8_MAX>, true, DXGI_FORMAT_R8G8_SNORM, 2 },
              { &copyVertexData<GLbyte, 3, true, INT8_MAX>, false, DXGI_FORMAT_R8G8B8A8_SNORM, 4 },
              { &copyVertexData<GLbyte, 4, false, INT8_MAX>, true, DXGI_FORMAT_R8G8B8A8_SNORM, 4 },
          },
      },
      { // GL_UNSIGNED_BYTE
          { // unnormalized
              { &copyToFloatVertexData<GLubyte, 1, false>, false, DXGI_FORMAT_R32_FLOAT, 4 },
              { &copyToFloatVertexData<GLubyte, 2, false>, false, DXGI_FORMAT_R32G32_FLOAT, 8 },
              { &copyToFloatVertexData<GLubyte, 3, false>, false, DXGI_FORMAT_R32G32B32_FLOAT, 12 },
              { &copyToFloatVertexData<GLubyte, 4, false>, false, DXGI_FORMAT_R32G32B32A32_FLOAT, 16 },
          },
          { // normalized
              { &copyVertexData<GLubyte, 1, false, UINT8_MAX>, true, DXGI_FORMAT_R8_UNORM, 1 },
              { &copyVertexData<GLubyte, 2, false, UINT8_MAX>, true, DXGI_FORMAT_R8G8_UNORM, 2 },
              { &copyVertexData<GLubyte, 3, true, UINT8_MAX>, false, DXGI_FORMAT_R8G8B8A8_UNORM, 4 },
              { &copyVertexData<GLubyte, 4, false, UINT8_MAX>, true, DXGI_FORMAT_R8G8B8A8_UNORM, 4 },
          },
      },
      { // GL_SHORT
          { // unnormalized
              { &copyToFloatVertexData<GLshort, 1, false>, false, DXGI_FORMAT_R32_FLOAT, 4 },
              { &copyToFloatVertexData<GLshort, 2, false>, false, DXGI_FORMAT_R32G32_FLOAT, 8 },
              { &copyToFloatVertexData<GLshort, 3, false>, false, DXGI_FORMAT_R32G32B32_FLOAT, 12 },
              { &copyToFloatVertexData<GLshort, 4, false>, false, DXGI_FORMAT_R32G32B32A32_FLOAT, 16 },
          },
          { // normalized
              { &copyVertexData<GLshort, 1, false, INT16_MAX>, true, DXGI_FORMAT_R16_SNORM, 2 },
              { &copyVertexData<GLshort, 2, false, INT16_MAX>, true, DXGI_FORMAT_R16G16_SNORM, 4 },
              { &copyVertexData<GLshort, 3, true, INT16_MAX>, false, DXGI_FORMAT_R16G16B16A16_SNORM, 8 },
              { &copyVertexData<GLshort, 4, false, INT16_MAX>, true, DXGI_FORMAT_R16G16B16A16_SNORM, 8 },
          },
      },
      { // GL_UNSIGNED_SHORT
          { // unnormalized
              { &copyToFloatVertexData<GLushort, 1, false>, false, DXGI_FORMAT_R32_FLOAT, 4 },
              { &copyToFloatVertexData<GLushort, 2, false>, false, DXGI_FORMAT_R32G32_FLOAT, 8 },
              { &copyToFloatVertexData<GLushort, 3, false>, false, DXGI_FORMAT_R32G32B32_FLOAT, 12 },
              { &copyToFloatVertexData<GLushort, 4, false>, false, DXGI_FORMAT_R32G32B32A32_FLOAT, 16 },
          },
          { // normalized
              { &copyVertexData<GLushort, 1, false, UINT16_MAX>, true, DXGI_FORMAT_R16_UNORM, 2 },
              { &copyVertexData<GLushort, 2, false, UINT16_MAX>, true, DXGI_FORMAT_R16G16_UNORM, 4 },
              { &copyVertexData<GLushort, 3, true, UINT16_MAX>, false, DXGI_FORMAT_R16G16B16A16_UNORM, 8 },
              { &copyVertexData<GLushort, 4, false, UINT16_MAX>, true, DXGI_FORMAT_R16G16B16A16_UNORM, 8 },
          },
      },
      { // GL_INT
          { // unnormalized
              { &copyToFloatVertexData<GLint, 1, false>, false, DXGI_FORMAT_R32_FLOAT, 4 },
              { &copyToFloatVertexData<GLint, 2, false>, false, DXGI_FORMAT_R32G32_FLOAT, 8 },
              { &copyToFloatVertexData<GLint, 3, false>, false, DXGI_FORMAT_R32G32B32_FLOAT, 12 },
              { &copyToFloatVertexData<GLint, 4, false>, false, DXGI_FORMAT_R32G32B32A32_FLOAT, 16 },
          },
          { // normalized
              { &copyToFloatVertexData<GLint, 1, true>, false, DXGI_FORMAT_R32_FLOAT, 4 },
              { &copyToFloatVertexData<GLint, 2, true>, false, DXGI_FORMAT_R32G32_FLOAT, 8 },
              { &copyToFloatVertexData<GLint, 3, true>, false, DXGI_FORMAT_R32G32B32_FLOAT, 12 },
              { &copyToFloatVertexData<GLint, 4, true>, false, DXGI_FORMAT_R32G32B32A32_FLOAT, 16 },
          },
      },
      { // GL_UNSIGNED_INT
          { // unnormalized
              { &copyToFloatVertexData<GLuint, 1, false>, false, DXGI_FORMAT_R32_FLOAT, 4 },
              { &copyToFloatVertexData<GLuint, 2, false>, false, DXGI_FORMAT_R32G32_FLOAT, 8 },
              { &copyToFloatVertexData<GLuint, 3, false>, false, DXGI_FORMAT_R32G32B32_FLOAT, 12 },
              { &copyToFloatVertexData<GLuint, 4, false>, false, DXGI_FORMAT_R32G32B32A32_FLOAT, 16 },
          },
          { // normalized
              { &copyToFloatVertexData<GLuint, 1, true>, false, DXGI_FORMAT_R32_FLOAT, 4 },
              { &copyToFloatVertexData<GLuint, 2, true>, false, DXGI_FORMAT_R32G32_FLOAT, 8 },
              { &copyToFloatVertexData<GLuint, 3, true>, false, DXGI_FORMAT_R32G32B32_FLOAT, 12 },
              { &copyToFloatVertexData<GLuint, 4, true>, false, DXGI_FORMAT_R32G32B32A32_FLOAT, 16 },
          },
      },
      { // GL_INT_2_10_10_10_REV
          { // unnormalized
              { NULL, false, DXGI_FORMAT_UNKNOWN, 0 },
              { NULL, false, DXGI_FORMAT_UNKNOWN, 0 },
              { NULL, false, DXGI_FORMAT_UNKNOWN, 0 },
              { &copyPackedVertexData<true, false, true>, false, DXGI_FORMAT_R32G32B32A32_FLOAT, 16 },
          },
          { // normalized
              { NULL, false, DXGI_FORMAT_UNKNOWN, 0 },
              { NULL, false, DXGI_FORMAT_UNKNOWN, 0 },
              { NULL, false, DXGI_FORMAT_UNKNOWN, 0 },
              { &copyPackedVertexData<true, true, true>, true, DXGI_FORMAT_R32G32B32A32_FLOAT, 16 },
          },
      },
      { // GL_UNSIGNED_INT_2_10_10_10_REV
          { // unnormalized
              { NULL, false, DXGI_FORMAT_UNKNOWN, 0 },
              { NULL, false, DXGI_FORMAT_UNKNOWN, 0 },
              { NULL, false, DXGI_FORMAT_UNKNOWN, 0 },
              { &copyPackedVertexData<true, false, true>, false, DXGI_FORMAT_R32G32B32A32_FLOAT, 16 },
          },
          { // normalized
              { NULL, false, DXGI_FORMAT_UNKNOWN, 0 },
              { NULL, false, DXGI_FORMAT_UNKNOWN, 0 },
              { NULL, false, DXGI_FORMAT_UNKNOWN, 0 },
              { &copyPackedUnsignedVertexData, true, DXGI_FORMAT_R10G10B10A2_UNORM, 4 },
          },
      },
      { // GL_FIXED
          { // unnormalized
              { &copyFixedVertexData<1>, false, DXGI_FORMAT_R32_FLOAT, 4 },
              { &copyFixedVertexData<2>, false, DXGI_FORMAT_R32G32_FLOAT, 8 },
              { &copyFixedVertexData<3>, false, DXGI_FORMAT_R32G32B32_FLOAT, 12 },
              { &copyFixedVertexData<4>, false, DXGI_FORMAT_R32G32B32A32_FLOAT, 16 },
          },
          { // normalized
              { &copyFixedVertexData<1>, false, DXGI_FORMAT_R32_FLOAT, 4 },
              { &copyFixedVertexData<2>, false, DXGI_FORMAT_R32G32_FLOAT, 8 },
              { &copyFixedVertexData<3>, false, DXGI_FORMAT_R32G32B32_FLOAT, 12 },
              { &copyFixedVertexData<4>, false, DXGI_FORMAT_R32G32B32A32_FLOAT, 16 },
          },
      },
      { // GL_HALF_FLOAT
          { // unnormalized
              { &copyVertexData<GLhalf, 1, false, gl::Float16One>, true, DXGI_FORMAT_R16_FLOAT, 2 },
              { &copyVertexData<GLhalf, 2, false, gl::Float16One>, true, DXGI_FORMAT_R16G16_FLOAT, 4 },
              { &copyVertexData<GLhalf, 3, true, gl::Float16One>, false, DXGI_FORMAT_R16G16B16A16_FLOAT, 8 },
              { &copyVertexData<GLhalf, 4, false, gl::Float16One>, true, DXGI_FORMAT_R16G16B16A16_FLOAT, 8 },
          },
          { // normalized
              { &copyVertexData<GLhalf, 1, false, gl::Float16One>, true, DXGI_FORMAT_R16_FLOAT, 2 },
              { &copyVertexData<GLhalf, 2, false, gl::Float16One>, true, DXGI_FORMAT_R16G16_FLOAT, 4 },
              { &copyVertexData<GLhalf, 3, true, gl::Float16One>, false, DXGI_FORMAT_R16G16B16A16_FLOAT, 8 },
              { &copyVertexData<GLhalf, 4, false, gl::Float16One>, true, DXGI_FORMAT_R16G16B16A16_FLOAT, 8 },
          },
      },
      { // GL_FLOAT
          { // unnormalized
              { &copyVertexData<GLfloat, 1, false, gl::Float32One>, true, DXGI_FORMAT_R32_FLOAT, 4 },
              { &copyVertexData<GLfloat, 2, false, gl::Float32One>, true, DXGI_FORMAT_R32G32_FLOAT, 8 },
              { &copyVertexData<GLfloat, 3, false, gl::Float32One>, true, DXGI_FORMAT_R32G32B32_FLOAT, 12 },
              { &copyVertexData<GLfloat, 4, false, gl::Float32One>, true, DXGI_FORMAT_R32G32B32A32_FLOAT, 16 },
          },
          { // normalized
              { &copyVertexData<GLfloat, 1, false, gl::Float32One>, true, DXGI_FORMAT_R32_FLOAT, 4 },
              { &copyVertexData<GLfloat, 2, false, gl::Float32One>, true, DXGI_FORMAT_R32G32_FLOAT, 8 },
              { &copyVertexData<GLfloat, 3, false, gl::Float32One>, true, DXGI_FORMAT_R32G32B32_FLOAT, 12 },
              { &copyVertexData<GLfloat, 4, false, gl::Float32One>, true, DXGI_FORMAT_R32G32B32A32_FLOAT, 16 },
          },
      },
  };
  
  const VertexBuffer11::VertexConverter VertexBuffer11::mIntegerVertexTranslations[NUM_GL_INTEGER_VERTEX_ATTRIB_TYPES][4] =
  {
      { // GL_BYTE
          { &copyVertexData<GLbyte, 1, false, 1>, true, DXGI_FORMAT_R8_SINT, 1 },
          { &copyVertexData<GLbyte, 2, false, 1>, true, DXGI_FORMAT_R8G8_SINT, 2 },
          { &copyVertexData<GLbyte, 3, true, 1>, false, DXGI_FORMAT_R8G8B8A8_SINT, 4 },
          { &copyVertexData<GLbyte, 4, false, 1>, true, DXGI_FORMAT_R8G8B8A8_SINT, 4 },
      },
      { // GL_UNSIGNED_BYTE
          { &copyVertexData<GLubyte, 1, false, 1>, true, DXGI_FORMAT_R8_UINT, 1 },
          { &copyVertexData<GLubyte, 2, false, 1>, true, DXGI_FORMAT_R8G8_UINT, 2 },
          { &copyVertexData<GLubyte, 3, true, 1>, false, DXGI_FORMAT_R8G8B8A8_UINT, 4 },
          { &copyVertexData<GLubyte, 4, false, 1>, true, DXGI_FORMAT_R8G8B8A8_UINT, 4 },
      },
      { // GL_SHORT
          { &copyVertexData<GLshort, 1, false, 1>, true, DXGI_FORMAT_R16_SINT, 2 },
          { &copyVertexData<GLshort, 2, false, 1>, true, DXGI_FORMAT_R16G16_SINT, 4 },
          { &copyVertexData<GLshort, 3, true, 1>, false, DXGI_FORMAT_R16G16B16A16_SINT, 8 },
          { &copyVertexData<GLshort, 4, false, 1>, true, DXGI_FORMAT_R16G16B16A16_SINT, 8 },
      },
      { // GL_UNSIGNED_SHORT
          { &copyVertexData<GLushort, 1, false, 1>, true, DXGI_FORMAT_R16_UINT, 2 },
          { &copyVertexData<GLushort, 2, false, 1>, true, DXGI_FORMAT_R16G16_UINT, 4 },
          { &copyVertexData<GLushort, 3, true, 1>, false, DXGI_FORMAT_R16G16B16A16_UINT, 8 },
          { &copyVertexData<GLushort, 4, false, 1>, true, DXGI_FORMAT_R16G16B16A16_UINT, 8 },
      },
      { // GL_INT
          { &copyVertexData<GLint, 1, false, 1>, true, DXGI_FORMAT_R32_SINT, 4 },
          { &copyVertexData<GLint, 2, false, 1>, true, DXGI_FORMAT_R32G32_SINT, 8 },
          { &copyVertexData<GLint, 3, false, 1>, true, DXGI_FORMAT_R32G32B32_SINT, 12 },
          { &copyVertexData<GLint, 4, false, 1>, true, DXGI_FORMAT_R32G32B32A32_SINT, 16 },
      },
      { // GL_UNSIGNED_INT
          { &copyVertexData<GLuint, 1, false, 1>, true, DXGI_FORMAT_R32_UINT, 4 },
          { &copyVertexData<GLuint, 2, false, 1>, true, DXGI_FORMAT_R32G32_UINT, 8 },
          { &copyVertexData<GLuint, 3, false, 1>, true, DXGI_FORMAT_R32G32B32_UINT, 12 },
          { &copyVertexData<GLuint, 4, false, 1>, true, DXGI_FORMAT_R32G32B32A32_UINT, 16 },
      },
      { // GL_INT_2_10_10_10_REV
          { NULL, false, DXGI_FORMAT_UNKNOWN, 0 },
          { NULL, false, DXGI_FORMAT_UNKNOWN, 0 },
          { NULL, false, DXGI_FORMAT_UNKNOWN, 0 },
          { &copyPackedVertexData<true, true, false>, true, DXGI_FORMAT_R16G16B16A16_SINT, 8 },
      },
      { // GL_UNSIGNED_INT_2_10_10_10_REV
          { NULL, false, DXGI_FORMAT_UNKNOWN, 0 },
          { NULL, false, DXGI_FORMAT_UNKNOWN, 0 },
          { NULL, false, DXGI_FORMAT_UNKNOWN, 0 },
          { &copyPackedUnsignedVertexData, true, DXGI_FORMAT_R10G10B10A2_UINT, 4 },
      },
  };
  
  const VertexBuffer11::VertexConverter &VertexBuffer11::getVertexConversion(const gl::VertexAttribute &attribute)
  {
      GLenum type = attribute.mArrayEnabled ? attribute.mType : attribute.mCurrentValue.Type;
      if (attribute.mPureInteger)
      {
          unsigned int typeIndex = 0;
          switch (type)
          {
            case GL_BYTE:                        typeIndex = 0; break;
            case GL_UNSIGNED_BYTE:               typeIndex = 1; break;
            case GL_SHORT:                       typeIndex = 2; break;
            case GL_UNSIGNED_SHORT:              typeIndex = 3; break;
            case GL_INT:                         typeIndex = 4; break;
            case GL_UNSIGNED_INT:                typeIndex = 5; break;
            case GL_INT_2_10_10_10_REV:          typeIndex = 6; break;
            case GL_UNSIGNED_INT_2_10_10_10_REV: typeIndex = 7; break;
            default:                             UNREACHABLE(); break;
          }
  
          return mIntegerVertexTranslations[typeIndex][attribute.mSize - 1];
      }
      else
      {
          unsigned int typeIndex = 0;
          switch (type)
          {
            case GL_BYTE:                        typeIndex =  0; break;
            case GL_UNSIGNED_BYTE:               typeIndex =  1; break;
            case GL_SHORT:                       typeIndex =  2; break;
            case GL_UNSIGNED_SHORT:              typeIndex =  3; break;
            case GL_INT:                         typeIndex =  4; break;
            case GL_UNSIGNED_INT:                typeIndex =  5; break;
            case GL_INT_2_10_10_10_REV:          typeIndex =  6; break;
            case GL_UNSIGNED_INT_2_10_10_10_REV: typeIndex =  7; break;
            case GL_FIXED:                       typeIndex =  8; break;
            case GL_HALF_FLOAT:                  typeIndex =  9; break;
            case GL_FLOAT:                       typeIndex = 10; break;
            default:                             UNREACHABLE(); break;
          }
  
          return mFloatVertexTranslations[typeIndex][attribute.mNormalized ? 1 : 0][attribute.mSize - 1];
      }
  }
  
  }
  

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