kc3-lang/angle/src/libGLESv2/ProgramBinary.cpp

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• Hash : 233fe954
  Author :
  Date : 2013-01-25T21:51:57
  

  Added support for vertex texure fetch in DX11 mode.
  
  Trac #22354
  
  Signed-off-by: Geoff Lang
  Signed-off-by: Shannon Woods
  Author: Jamie Madill
  
  git-svn-id: https://angleproject.googlecode.com/svn/branches/dx11proto@1757 736b8ea6-26fd-11df-bfd4-992fa37f6226
  

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• src/libGLESv2/ProgramBinary.cpp

• //
  // Copyright (c) 2002-2013 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.
  //
  
  // Program.cpp: Implements the gl::Program class. Implements GL program objects
  // and related functionality. [OpenGL ES 2.0.24] section 2.10.3 page 28.
  
  #include "libGLESv2/BinaryStream.h"
  #include "libGLESv2/ProgramBinary.h"
  
  #include "common/debug.h"
  #include "common/version.h"
  
  #include "libGLESv2/main.h"
  #include "libGLESv2/Shader.h"
  
  #include <string>
  
  #undef near
  #undef far
  
  namespace gl
  {
  std::string str(int i)
  {
      char buffer[20];
      snprintf(buffer, sizeof(buffer), "%d", i);
      return buffer;
  }
  
  UniformLocation::UniformLocation(const std::string &name, unsigned int element, unsigned int index) 
      : name(name), element(element), index(index)
  {
  }
  
  unsigned int ProgramBinary::mCurrentSerial = 1;
  
  ProgramBinary::ProgramBinary(rx::Renderer *renderer) : mRenderer(renderer), RefCountObject(0), mSerial(issueSerial())
  {
      mPixelExecutable = NULL;
      mVertexExecutable = NULL;
  
      mValidated = false;
  
      for (int index = 0; index < MAX_VERTEX_ATTRIBS; index++)
      {
          mSemanticIndex[index] = -1;
      }
  
      for (int index = 0; index < MAX_TEXTURE_IMAGE_UNITS; index++)
      {
          mSamplersPS[index].active = false;
      }
  
      for (int index = 0; index < IMPLEMENTATION_MAX_VERTEX_TEXTURE_IMAGE_UNITS; index++)
      {
          mSamplersVS[index].active = false;
      }
  
      mUsedVertexSamplerRange = 0;
      mUsedPixelSamplerRange = 0;
  }
  
  ProgramBinary::~ProgramBinary()
  {
      delete mPixelExecutable;
      delete mVertexExecutable;
  
      while (!mUniforms.empty())
      {
          delete mUniforms.back();
          mUniforms.pop_back();
      }
  }
  
  unsigned int ProgramBinary::getSerial() const
  {
      return mSerial;
  }
  
  unsigned int ProgramBinary::issueSerial()
  {
      return mCurrentSerial++;
  }
  
  rx::ShaderExecutable *ProgramBinary::getPixelExecutable()
  {
      return mPixelExecutable;
  }
  
  rx::ShaderExecutable *ProgramBinary::getVertexExecutable()
  {
      return mVertexExecutable;
  }
  
  GLuint ProgramBinary::getAttributeLocation(const char *name)
  {
      if (name)
      {
          for (int index = 0; index < MAX_VERTEX_ATTRIBS; index++)
          {
              if (mLinkedAttribute[index].name == std::string(name))
              {
                  return index;
              }
          }
      }
  
      return -1;
  }
  
  int ProgramBinary::getSemanticIndex(int attributeIndex)
  {
      ASSERT(attributeIndex >= 0 && attributeIndex < MAX_VERTEX_ATTRIBS);
      
      return mSemanticIndex[attributeIndex];
  }
  
  // Returns one more than the highest sampler index used.
  GLint ProgramBinary::getUsedSamplerRange(SamplerType type)
  {
      switch (type)
      {
        case SAMPLER_PIXEL:
          return mUsedPixelSamplerRange;
        case SAMPLER_VERTEX:
          return mUsedVertexSamplerRange;
        default:
          UNREACHABLE();
          return 0;
      }
  }
  
  bool ProgramBinary::usesPointSize() const
  {
      return mUsesPointSize;
  }
  
  // Returns the index of the texture image unit (0-19) corresponding to a Direct3D 9 sampler
  // index (0-15 for the pixel shader and 0-3 for the vertex shader).
  GLint ProgramBinary::getSamplerMapping(SamplerType type, unsigned int samplerIndex)
  {
      GLint logicalTextureUnit = -1;
  
      switch (type)
      {
        case SAMPLER_PIXEL:
          ASSERT(samplerIndex < sizeof(mSamplersPS)/sizeof(mSamplersPS[0]));
  
          if (mSamplersPS[samplerIndex].active)
          {
              logicalTextureUnit = mSamplersPS[samplerIndex].logicalTextureUnit;
          }
          break;
        case SAMPLER_VERTEX:
          ASSERT(samplerIndex < sizeof(mSamplersVS)/sizeof(mSamplersVS[0]));
  
          if (mSamplersVS[samplerIndex].active)
          {
              logicalTextureUnit = mSamplersVS[samplerIndex].logicalTextureUnit;
          }
          break;
        default: UNREACHABLE();
      }
  
      if (logicalTextureUnit >= 0 && logicalTextureUnit < (GLint)getContext()->getMaximumCombinedTextureImageUnits())
      {
          return logicalTextureUnit;
      }
  
      return -1;
  }
  
  // Returns the texture type for a given Direct3D 9 sampler type and
  // index (0-15 for the pixel shader and 0-3 for the vertex shader).
  TextureType ProgramBinary::getSamplerTextureType(SamplerType type, unsigned int samplerIndex)
  {
      switch (type)
      {
        case SAMPLER_PIXEL:
          ASSERT(samplerIndex < sizeof(mSamplersPS)/sizeof(mSamplersPS[0]));
          ASSERT(mSamplersPS[samplerIndex].active);
          return mSamplersPS[samplerIndex].textureType;
        case SAMPLER_VERTEX:
          ASSERT(samplerIndex < sizeof(mSamplersVS)/sizeof(mSamplersVS[0]));
          ASSERT(mSamplersVS[samplerIndex].active);
          return mSamplersVS[samplerIndex].textureType;
        default: UNREACHABLE();
      }
  
      return TEXTURE_2D;
  }
  
  GLint ProgramBinary::getUniformLocation(std::string name)
  {
      unsigned int subscript = 0;
  
      // Strip any trailing array operator and retrieve the subscript
      size_t open = name.find_last_of('[');
      size_t close = name.find_last_of(']');
      if (open != std::string::npos && close == name.length() - 1)
      {
          subscript = atoi(name.substr(open + 1).c_str());
          name.erase(open);
      }
  
      unsigned int numUniforms = mUniformIndex.size();
      for (unsigned int location = 0; location < numUniforms; location++)
      {
          if (mUniformIndex[location].name == name &&
              mUniformIndex[location].element == subscript)
          {
              return location;
          }
      }
  
      return -1;
  }
  
  bool ProgramBinary::setUniform1fv(GLint location, GLsizei count, const GLfloat* v)
  {
      if (location < 0 || location >= (int)mUniformIndex.size())
      {
          return false;
      }
  
      Uniform *targetUniform = mUniforms[mUniformIndex[location].index];
      targetUniform->dirty = true;
  
      if (targetUniform->type == GL_FLOAT)
      {
          int elementCount = targetUniform->elementCount();
  
          if (elementCount == 1 && count > 1)
              return false; // attempting to write an array to a non-array uniform is an INVALID_OPERATION
  
          count = std::min(elementCount - (int)mUniformIndex[location].element, count);
  
          GLfloat *target = (GLfloat*)targetUniform->data + mUniformIndex[location].element * 4;
  
          for (int i = 0; i < count; i++)
          {
              target[0] = v[0];
              target[1] = 0;
              target[2] = 0;
              target[3] = 0;
              target += 4;
              v += 1;
          }
      }
      else if (targetUniform->type == GL_BOOL)
      {
          int elementCount = targetUniform->elementCount();
  
          if (elementCount == 1 && count > 1)
              return false; // attempting to write an array to a non-array uniform is an INVALID_OPERATION
  
          count = std::min(elementCount - (int)mUniformIndex[location].element, count);
          GLboolean *boolParams = (GLboolean*)targetUniform->data + mUniformIndex[location].element;
  
          for (int i = 0; i < count; ++i)
          {
              if (v[i] == 0.0f)
              {
                  boolParams[i] = GL_FALSE;
              }
              else
              {
                  boolParams[i] = GL_TRUE;
              }
          }
      }
      else
      {
          return false;
      }
  
      return true;
  }
  
  bool ProgramBinary::setUniform2fv(GLint location, GLsizei count, const GLfloat *v)
  {
      if (location < 0 || location >= (int)mUniformIndex.size())
      {
          return false;
      }
  
      Uniform *targetUniform = mUniforms[mUniformIndex[location].index];
      targetUniform->dirty = true;
  
      if (targetUniform->type == GL_FLOAT_VEC2)
      {
          int elementCount = targetUniform->elementCount();
  
          if (elementCount == 1 && count > 1)
              return false; // attempting to write an array to a non-array uniform is an INVALID_OPERATION
  
          count = std::min(elementCount - (int)mUniformIndex[location].element, count);
  
          GLfloat *target = (GLfloat*)targetUniform->data + mUniformIndex[location].element * 4;
  
          for (int i = 0; i < count; i++)
          {
              target[0] = v[0];
              target[1] = v[1];
              target[2] = 0;
              target[3] = 0;
              target += 4;
              v += 2;
          }
      }
      else if (targetUniform->type == GL_BOOL_VEC2)
      {
          int elementCount = targetUniform->elementCount();
  
          if (elementCount == 1 && count > 1)
              return false; // attempting to write an array to a non-array uniform is an INVALID_OPERATION
  
          count = std::min(elementCount - (int)mUniformIndex[location].element, count);
  
          GLboolean *boolParams = (GLboolean*)targetUniform->data + mUniformIndex[location].element * 2;
  
          for (int i = 0; i < count * 2; ++i)
          {
              if (v[i] == 0.0f)
              {
                  boolParams[i] = GL_FALSE;
              }
              else
              {
                  boolParams[i] = GL_TRUE;
              }
          }
      }
      else 
      {
          return false;
      }
  
      return true;
  }
  
  bool ProgramBinary::setUniform3fv(GLint location, GLsizei count, const GLfloat *v)
  {
      if (location < 0 || location >= (int)mUniformIndex.size())
      {
          return false;
      }
  
      Uniform *targetUniform = mUniforms[mUniformIndex[location].index];
      targetUniform->dirty = true;
  
      if (targetUniform->type == GL_FLOAT_VEC3)
      {
          int elementCount = targetUniform->elementCount();
  
          if (elementCount == 1 && count > 1)
              return false; // attempting to write an array to a non-array uniform is an INVALID_OPERATION
  
          count = std::min(elementCount - (int)mUniformIndex[location].element, count);
  
          GLfloat *target = (GLfloat*)targetUniform->data + mUniformIndex[location].element * 4;
  
          for (int i = 0; i < count; i++)
          {
              target[0] = v[0];
              target[1] = v[1];
              target[2] = v[2];
              target[3] = 0;
              target += 4;
              v += 3;
          }
      }
      else if (targetUniform->type == GL_BOOL_VEC3)
      {
          int elementCount = targetUniform->elementCount();
  
          if (elementCount == 1 && count > 1)
              return false; // attempting to write an array to a non-array uniform is an INVALID_OPERATION
  
          count = std::min(elementCount - (int)mUniformIndex[location].element, count);
          GLboolean *boolParams = (GLboolean*)targetUniform->data + mUniformIndex[location].element * 3;
  
          for (int i = 0; i < count * 3; ++i)
          {
              if (v[i] == 0.0f)
              {
                  boolParams[i] = GL_FALSE;
              }
              else
              {
                  boolParams[i] = GL_TRUE;
              }
          }
      }
      else 
      {
          return false;
      }
  
      return true;
  }
  
  bool ProgramBinary::setUniform4fv(GLint location, GLsizei count, const GLfloat *v)
  {
      if (location < 0 || location >= (int)mUniformIndex.size())
      {
          return false;
      }
  
      Uniform *targetUniform = mUniforms[mUniformIndex[location].index];
      targetUniform->dirty = true;
  
      if (targetUniform->type == GL_FLOAT_VEC4)
      {
          int elementCount = targetUniform->elementCount();
  
          if (elementCount == 1 && count > 1)
              return false; // attempting to write an array to a non-array uniform is an INVALID_OPERATION
  
          count = std::min(elementCount - (int)mUniformIndex[location].element, count);
  
          memcpy(targetUniform->data + mUniformIndex[location].element * sizeof(GLfloat) * 4,
                 v, 4 * sizeof(GLfloat) * count);
      }
      else if (targetUniform->type == GL_BOOL_VEC4)
      {
          int elementCount = targetUniform->elementCount();
  
          if (elementCount == 1 && count > 1)
              return false; // attempting to write an array to a non-array uniform is an INVALID_OPERATION
  
          count = std::min(elementCount - (int)mUniformIndex[location].element, count);
          GLboolean *boolParams = (GLboolean*)targetUniform->data + mUniformIndex[location].element * 4;
  
          for (int i = 0; i < count * 4; ++i)
          {
              if (v[i] == 0.0f)
              {
                  boolParams[i] = GL_FALSE;
              }
              else
              {
                  boolParams[i] = GL_TRUE;
              }
          }
      }
      else 
      {
          return false;
      }
  
      return true;
  }
  
  template<typename T, int targetWidth, int targetHeight, int srcWidth, int srcHeight>
  void transposeMatrix(T *target, const GLfloat *value)
  {
      int copyWidth = std::min(targetWidth, srcWidth);
      int copyHeight = std::min(targetHeight, srcHeight);
  
      for (int x = 0; x < copyWidth; x++)
      {
          for (int y = 0; y < copyHeight; y++)
          {
              target[x * targetWidth + y] = (T)value[y * srcWidth + x];
          }
      }
      // clear unfilled right side
      for (int y = 0; y < copyHeight; y++)
      {
          for (int x = srcWidth; x < targetWidth; x++)
          {
              target[y * targetWidth + x] = (T)0;
          }
      }
      // clear unfilled bottom.
      for (int y = srcHeight; y < targetHeight; y++)
      {
          for (int x = 0; x < targetWidth; x++)
          {
              target[y * targetWidth + x] = (T)0;
          }
      }
  }
  
  bool ProgramBinary::setUniformMatrix2fv(GLint location, GLsizei count, const GLfloat *value)
  {
      if (location < 0 || location >= (int)mUniformIndex.size())
      {
          return false;
      }
  
      Uniform *targetUniform = mUniforms[mUniformIndex[location].index];
      targetUniform->dirty = true;
  
      if (targetUniform->type != GL_FLOAT_MAT2)
      {
          return false;
      }
  
      int elementCount = targetUniform->elementCount();
  
      if (elementCount == 1 && count > 1)
          return false; // attempting to write an array to a non-array uniform is an INVALID_OPERATION
  
      count = std::min(elementCount - (int)mUniformIndex[location].element, count);
  
      GLfloat *target = (GLfloat*)targetUniform->data + mUniformIndex[location].element * 8;
      for (int i = 0; i < count; i++)
      {
          transposeMatrix<GLfloat,4,2,2,2>(target, value);
          target += 8;
          value += 4;
      }
  
      return true;
  }
  
  bool ProgramBinary::setUniformMatrix3fv(GLint location, GLsizei count, const GLfloat *value)
  {
      if (location < 0 || location >= (int)mUniformIndex.size())
      {
          return false;
      }
  
      Uniform *targetUniform = mUniforms[mUniformIndex[location].index];
      targetUniform->dirty = true;
  
      if (targetUniform->type != GL_FLOAT_MAT3)
      {
          return false;
      }
  
      int elementCount = targetUniform->elementCount();
  
      if (elementCount == 1 && count > 1)
          return false; // attempting to write an array to a non-array uniform is an INVALID_OPERATION
  
      count = std::min(elementCount - (int)mUniformIndex[location].element, count);
  
      GLfloat *target = (GLfloat*)targetUniform->data + mUniformIndex[location].element * 12;
      for (int i = 0; i < count; i++)
      {
          transposeMatrix<GLfloat,4,3,3,3>(target, value);
          target += 12;
          value += 9;
      }
  
      return true;
  }
  
  
  bool ProgramBinary::setUniformMatrix4fv(GLint location, GLsizei count, const GLfloat *value)
  {
      if (location < 0 || location >= (int)mUniformIndex.size())
      {
          return false;
      }
  
      Uniform *targetUniform = mUniforms[mUniformIndex[location].index];
      targetUniform->dirty = true;
  
      if (targetUniform->type != GL_FLOAT_MAT4)
      {
          return false;
      }
  
      int elementCount = targetUniform->elementCount();
  
      if (elementCount == 1 && count > 1)
          return false; // attempting to write an array to a non-array uniform is an INVALID_OPERATION
  
      count = std::min(elementCount - (int)mUniformIndex[location].element, count);
  
      GLfloat *target = (GLfloat*)(targetUniform->data + mUniformIndex[location].element * sizeof(GLfloat) * 16);
      for (int i = 0; i < count; i++)
      {
          transposeMatrix<GLfloat,4,4,4,4>(target, value);
          target += 16;
          value += 16;
      }
  
      return true;
  }
  
  bool ProgramBinary::setUniform1iv(GLint location, GLsizei count, const GLint *v)
  {
      if (location < 0 || location >= (int)mUniformIndex.size())
      {
          return false;
      }
  
      Uniform *targetUniform = mUniforms[mUniformIndex[location].index];
      targetUniform->dirty = true;
  
      if (targetUniform->type == GL_INT ||
          targetUniform->type == GL_SAMPLER_2D ||
          targetUniform->type == GL_SAMPLER_CUBE)
      {
          int elementCount = targetUniform->elementCount();
  
          if (elementCount == 1 && count > 1)
              return false; // attempting to write an array to a non-array uniform is an INVALID_OPERATION
  
          count = std::min(elementCount - (int)mUniformIndex[location].element, count);
  
          memcpy(targetUniform->data + mUniformIndex[location].element * sizeof(GLint),
                 v, sizeof(GLint) * count);
      }
      else if (targetUniform->type == GL_BOOL)
      {
          int elementCount = targetUniform->elementCount();
  
          if (elementCount == 1 && count > 1)
              return false; // attempting to write an array to a non-array uniform is an INVALID_OPERATION
  
          count = std::min(elementCount - (int)mUniformIndex[location].element, count);
          GLboolean *boolParams = (GLboolean*)targetUniform->data + mUniformIndex[location].element;
  
          for (int i = 0; i < count; ++i)
          {
              if (v[i] == 0)
              {
                  boolParams[i] = GL_FALSE;
              }
              else
              {
                  boolParams[i] = GL_TRUE;
              }
          }
      }
      else
      {
          return false;
      }
  
      return true;
  }
  
  bool ProgramBinary::setUniform2iv(GLint location, GLsizei count, const GLint *v)
  {
      if (location < 0 || location >= (int)mUniformIndex.size())
      {
          return false;
      }
  
      Uniform *targetUniform = mUniforms[mUniformIndex[location].index];
      targetUniform->dirty = true;
  
      if (targetUniform->type == GL_INT_VEC2)
      {
          int elementCount = targetUniform->elementCount();
  
          if (elementCount == 1 && count > 1)
              return false; // attempting to write an array to a non-array uniform is an INVALID_OPERATION
  
          count = std::min(elementCount - (int)mUniformIndex[location].element, count);
  
          memcpy(targetUniform->data + mUniformIndex[location].element * sizeof(GLint) * 2,
                 v, 2 * sizeof(GLint) * count);
      }
      else if (targetUniform->type == GL_BOOL_VEC2)
      {
          int elementCount = targetUniform->elementCount();
  
          if (elementCount == 1 && count > 1)
              return false; // attempting to write an array to a non-array uniform is an INVALID_OPERATION
  
          count = std::min(elementCount - (int)mUniformIndex[location].element, count);
          GLboolean *boolParams = (GLboolean*)targetUniform->data + mUniformIndex[location].element * 2;
  
          for (int i = 0; i < count * 2; ++i)
          {
              if (v[i] == 0)
              {
                  boolParams[i] = GL_FALSE;
              }
              else
              {
                  boolParams[i] = GL_TRUE;
              }
          }
      }
      else
      {
          return false;
      }
  
      return true;
  }
  
  bool ProgramBinary::setUniform3iv(GLint location, GLsizei count, const GLint *v)
  {
      if (location < 0 || location >= (int)mUniformIndex.size())
      {
          return false;
      }
  
      Uniform *targetUniform = mUniforms[mUniformIndex[location].index];
      targetUniform->dirty = true;
  
      if (targetUniform->type == GL_INT_VEC3)
      {
          int elementCount = targetUniform->elementCount();
  
          if (elementCount == 1 && count > 1)
              return false; // attempting to write an array to a non-array uniform is an INVALID_OPERATION
  
          count = std::min(elementCount - (int)mUniformIndex[location].element, count);
  
          memcpy(targetUniform->data + mUniformIndex[location].element * sizeof(GLint) * 3,
                 v, 3 * sizeof(GLint) * count);
      }
      else if (targetUniform->type == GL_BOOL_VEC3)
      {
          int elementCount = targetUniform->elementCount();
  
          if (elementCount == 1 && count > 1)
              return false; // attempting to write an array to a non-array uniform is an INVALID_OPERATION
  
          count = std::min(elementCount - (int)mUniformIndex[location].element, count);
          GLboolean *boolParams = (GLboolean*)targetUniform->data + mUniformIndex[location].element * 3;
  
          for (int i = 0; i < count * 3; ++i)
          {
              if (v[i] == 0)
              {
                  boolParams[i] = GL_FALSE;
              }
              else
              {
                  boolParams[i] = GL_TRUE;
              }
          }
      }
      else
      {
          return false;
      }
  
      return true;
  }
  
  bool ProgramBinary::setUniform4iv(GLint location, GLsizei count, const GLint *v)
  {
      if (location < 0 || location >= (int)mUniformIndex.size())
      {
          return false;
      }
  
      Uniform *targetUniform = mUniforms[mUniformIndex[location].index];
      targetUniform->dirty = true;
  
      if (targetUniform->type == GL_INT_VEC4)
      {
          int elementCount = targetUniform->elementCount();
  
          if (elementCount == 1 && count > 1)
              return false; // attempting to write an array to a non-array uniform is an INVALID_OPERATION
  
          count = std::min(elementCount - (int)mUniformIndex[location].element, count);
  
          memcpy(targetUniform->data + mUniformIndex[location].element * sizeof(GLint) * 4,
                 v, 4 * sizeof(GLint) * count);
      }
      else if (targetUniform->type == GL_BOOL_VEC4)
      {
          int elementCount = targetUniform->elementCount();
  
          if (elementCount == 1 && count > 1)
              return false; // attempting to write an array to a non-array uniform is an INVALID_OPERATION
  
          count = std::min(elementCount - (int)mUniformIndex[location].element, count);
          GLboolean *boolParams = (GLboolean*)targetUniform->data + mUniformIndex[location].element * 4;
  
          for (int i = 0; i < count * 4; ++i)
          {
              if (v[i] == 0)
              {
                  boolParams[i] = GL_FALSE;
              }
              else
              {
                  boolParams[i] = GL_TRUE;
              }
          }
      }
      else
      {
          return false;
      }
  
      return true;
  }
  
  bool ProgramBinary::getUniformfv(GLint location, GLsizei *bufSize, GLfloat *params)
  {
      if (location < 0 || location >= (int)mUniformIndex.size())
      {
          return false;
      }
  
      Uniform *targetUniform = mUniforms[mUniformIndex[location].index];
  
      // sized queries -- ensure the provided buffer is large enough
      if (bufSize)
      {
          int requiredBytes = UniformExternalSize(targetUniform->type);
          if (*bufSize < requiredBytes)
          {
              return false;
          }
      }
  
      switch (targetUniform->type)
      {
        case GL_FLOAT_MAT2:
          transposeMatrix<GLfloat,2,2,4,2>(params, (GLfloat*)targetUniform->data + mUniformIndex[location].element * 8);
          break;
        case GL_FLOAT_MAT3:
          transposeMatrix<GLfloat,3,3,4,3>(params, (GLfloat*)targetUniform->data + mUniformIndex[location].element * 12);
          break;
        case GL_FLOAT_MAT4:
          transposeMatrix<GLfloat,4,4,4,4>(params, (GLfloat*)targetUniform->data + mUniformIndex[location].element * 16);
          break;
        default:
          {
              unsigned int count = UniformExternalComponentCount(targetUniform->type);
              unsigned int internalCount = UniformInternalComponentCount(targetUniform->type);
  
              switch (UniformComponentType(targetUniform->type))
              {
                case GL_BOOL:
                  {
                      GLboolean *boolParams = (GLboolean*)targetUniform->data + mUniformIndex[location].element * internalCount;
  
                      for (unsigned int i = 0; i < count; ++i)
                      {
                          params[i] = (boolParams[i] == GL_FALSE) ? 0.0f : 1.0f;
                      }
                  }
                  break;
                case GL_FLOAT:
                  memcpy(params, targetUniform->data + mUniformIndex[location].element * internalCount * sizeof(GLfloat),
                         count * sizeof(GLfloat));
                  break;
                case GL_INT:
                  {
                      GLint *intParams = (GLint*)targetUniform->data + mUniformIndex[location].element * internalCount;
  
                      for (unsigned int i = 0; i < count; ++i)
                      {
                          params[i] = (float)intParams[i];
                      }
                  }
                  break;
                default: UNREACHABLE();
              }
          }
      }
  
      return true;
  }
  
  bool ProgramBinary::getUniformiv(GLint location, GLsizei *bufSize, GLint *params)
  {
      if (location < 0 || location >= (int)mUniformIndex.size())
      {
          return false;
      }
  
      Uniform *targetUniform = mUniforms[mUniformIndex[location].index];
  
      // sized queries -- ensure the provided buffer is large enough
      if (bufSize)
      {
          int requiredBytes = UniformExternalSize(targetUniform->type);
          if (*bufSize < requiredBytes)
          {
              return false;
          }
      }
  
      switch (targetUniform->type)
      {
        case GL_FLOAT_MAT2:
          {
              transposeMatrix<GLint,2,2,4,2>(params, (GLfloat*)targetUniform->data + mUniformIndex[location].element * 8);
          }
          break;
        case GL_FLOAT_MAT3:
          {
              transposeMatrix<GLint,3,3,4,3>(params, (GLfloat*)targetUniform->data + mUniformIndex[location].element * 12);
          }
          break;
        case GL_FLOAT_MAT4:
          {
              transposeMatrix<GLint,4,4,4,4>(params, (GLfloat*)targetUniform->data + mUniformIndex[location].element * 16);
          }
          break;
        default:
          {
              unsigned int count = UniformExternalComponentCount(targetUniform->type);
              unsigned int internalCount = UniformInternalComponentCount(targetUniform->type);
  
              switch (UniformComponentType(targetUniform->type))
              {
                case GL_BOOL:
                  {
                      GLboolean *boolParams = targetUniform->data + mUniformIndex[location].element * internalCount;
  
                      for (unsigned int i = 0; i < count; ++i)
                      {
                          params[i] = (GLint)boolParams[i];
                      }
                  }
                  break;
                case GL_FLOAT:
                  {
                      GLfloat *floatParams = (GLfloat*)targetUniform->data + mUniformIndex[location].element * internalCount;
  
                      for (unsigned int i = 0; i < count; ++i)
                      {
                          params[i] = (GLint)floatParams[i];
                      }
                  }
                  break;
                case GL_INT:
                  memcpy(params, targetUniform->data + mUniformIndex[location].element * internalCount * sizeof(GLint),
                         count * sizeof(GLint));
                  break;
                default: UNREACHABLE();
              }
          }
      }
  
      return true;
  }
  
  void ProgramBinary::dirtyAllUniforms()
  {
      unsigned int numUniforms = mUniforms.size();
      for (unsigned int index = 0; index < numUniforms; index++)
      {
          mUniforms[index]->dirty = true;
      }
  }
  
  // Applies all the uniforms set for this program object to the renderer
  void ProgramBinary::applyUniforms()
  {
      // Retrieve sampler uniform values
      for (std::vector<Uniform*>::iterator ub = mUniforms.begin(), ue = mUniforms.end(); ub != ue; ++ub)
      {
          Uniform *targetUniform = *ub;
  
          if (targetUniform->dirty)
          {
              if (targetUniform->type == GL_SAMPLER_2D || 
                  targetUniform->type == GL_SAMPLER_CUBE)
              {
                  int count = targetUniform->elementCount();
                  GLint *v = (GLint*)targetUniform->data;
  
                  if (targetUniform->psRegisterIndex >= 0)
                  {
                      unsigned int firstIndex = targetUniform->psRegisterIndex;
  
                      for (int i = 0; i < count; i++)
                      {
                          unsigned int samplerIndex = firstIndex + i;
  
                          if (samplerIndex < MAX_TEXTURE_IMAGE_UNITS)
                          {
                              ASSERT(mSamplersPS[samplerIndex].active);
                              mSamplersPS[samplerIndex].logicalTextureUnit = v[i];
                          }
                      }
                  }
  
                  if (targetUniform->vsRegisterIndex >= 0)
                  {
                      unsigned int firstIndex = targetUniform->vsRegisterIndex;
  
                      for (int i = 0; i < count; i++)
                      {
                          unsigned int samplerIndex = firstIndex + i;
  
                          if (samplerIndex < IMPLEMENTATION_MAX_VERTEX_TEXTURE_IMAGE_UNITS)
                          {
                              ASSERT(mSamplersVS[samplerIndex].active);
                              mSamplersVS[samplerIndex].logicalTextureUnit = v[i];
                          }
                      }
                  }
              }
          }
      }
  
      mRenderer->applyUniforms(&mUniforms);
  }
  
  // Packs varyings into generic varying registers, using the algorithm from [OpenGL ES Shading Language 1.00 rev. 17] appendix A section 7 page 111
  // Returns the number of used varying registers, or -1 if unsuccesful
  int ProgramBinary::packVaryings(InfoLog &infoLog, const Varying *packing[][4], FragmentShader *fragmentShader)
  {
      Context *context = getContext();
      const int maxVaryingVectors = context->getMaximumVaryingVectors();
  
      for (VaryingList::iterator varying = fragmentShader->mVaryings.begin(); varying != fragmentShader->mVaryings.end(); varying++)
      {
          int n = VariableRowCount(varying->type) * varying->size;
          int m = VariableColumnCount(varying->type);
          bool success = false;
  
          if (m == 2 || m == 3 || m == 4)
          {
              for (int r = 0; r <= maxVaryingVectors - n && !success; r++)
              {
                  bool available = true;
  
                  for (int y = 0; y < n && available; y++)
                  {
                      for (int x = 0; x < m && available; x++)
                      {
                          if (packing[r + y][x])
                          {
                              available = false;
                          }
                      }
                  }
  
                  if (available)
                  {
                      varying->reg = r;
                      varying->col = 0;
  
                      for (int y = 0; y < n; y++)
                      {
                          for (int x = 0; x < m; x++)
                          {
                              packing[r + y][x] = &*varying;
                          }
                      }
  
                      success = true;
                  }
              }
  
              if (!success && m == 2)
              {
                  for (int r = maxVaryingVectors - n; r >= 0 && !success; r--)
                  {
                      bool available = true;
  
                      for (int y = 0; y < n && available; y++)
                      {
                          for (int x = 2; x < 4 && available; x++)
                          {
                              if (packing[r + y][x])
                              {
                                  available = false;
                              }
                          }
                      }
  
                      if (available)
                      {
                          varying->reg = r;
                          varying->col = 2;
  
                          for (int y = 0; y < n; y++)
                          {
                              for (int x = 2; x < 4; x++)
                              {
                                  packing[r + y][x] = &*varying;
                              }
                          }
  
                          success = true;
                      }
                  }
              }
          }
          else if (m == 1)
          {
              int space[4] = {0};
  
              for (int y = 0; y < maxVaryingVectors; y++)
              {
                  for (int x = 0; x < 4; x++)
                  {
                      space[x] += packing[y][x] ? 0 : 1;
                  }
              }
  
              int column = 0;
  
              for (int x = 0; x < 4; x++)
              {
                  if (space[x] >= n && space[x] < space[column])
                  {
                      column = x;
                  }
              }
  
              if (space[column] >= n)
              {
                  for (int r = 0; r < maxVaryingVectors; r++)
                  {
                      if (!packing[r][column])
                      {
                          varying->reg = r;
  
                          for (int y = r; y < r + n; y++)
                          {
                              packing[y][column] = &*varying;
                          }
  
                          break;
                      }
                  }
  
                  varying->col = column;
  
                  success = true;
              }
          }
          else UNREACHABLE();
  
          if (!success)
          {
              infoLog.append("Could not pack varying %s", varying->name.c_str());
  
              return -1;
          }
      }
  
      // Return the number of used registers
      int registers = 0;
  
      for (int r = 0; r < maxVaryingVectors; r++)
      {
          if (packing[r][0] || packing[r][1] || packing[r][2] || packing[r][3])
          {
              registers++;
          }
      }
  
      return registers;
  }
  
  bool ProgramBinary::linkVaryings(InfoLog &infoLog, std::string& pixelHLSL, std::string& vertexHLSL, FragmentShader *fragmentShader, VertexShader *vertexShader)
  {
      if (pixelHLSL.empty() || vertexHLSL.empty())
      {
          return false;
      }
  
      // Reset the varying register assignments
      for (VaryingList::iterator fragVar = fragmentShader->mVaryings.begin(); fragVar != fragmentShader->mVaryings.end(); fragVar++)
      {
          fragVar->reg = -1;
          fragVar->col = -1;
      }
  
      for (VaryingList::iterator vtxVar = vertexShader->mVaryings.begin(); vtxVar != vertexShader->mVaryings.end(); vtxVar++)
      {
          vtxVar->reg = -1;
          vtxVar->col = -1;
      }
  
      // Map the varyings to the register file
      const Varying *packing[MAX_VARYING_VECTORS_SM3][4] = {NULL};
      int registers = packVaryings(infoLog, packing, fragmentShader);
  
      if (registers < 0)
      {
          return false;
      }
  
      // Write the HLSL input/output declarations
      const int shaderModel = mRenderer->getMajorShaderModel();
      Context *context = getContext();
      const int maxVaryingVectors = context->getMaximumVaryingVectors();
  
      if (registers == maxVaryingVectors && fragmentShader->mUsesFragCoord)
      {
          infoLog.append("No varying registers left to support gl_FragCoord");
  
          return false;
      }
  
      for (VaryingList::iterator input = fragmentShader->mVaryings.begin(); input != fragmentShader->mVaryings.end(); input++)
      {
          bool matched = false;
  
          for (VaryingList::iterator output = vertexShader->mVaryings.begin(); output != vertexShader->mVaryings.end(); output++)
          {
              if (output->name == input->name)
              {
                  if (output->type != input->type || output->size != input->size)
                  {
                      infoLog.append("Type of vertex varying %s does not match that of the fragment varying", output->name.c_str());
  
                      return false;
                  }
  
                  output->reg = input->reg;
                  output->col = input->col;
  
                  matched = true;
                  break;
              }
          }
  
          if (!matched)
          {
              infoLog.append("Fragment varying %s does not match any vertex varying", input->name.c_str());
  
              return false;
          }
      }
  
      mUsesPointSize = vertexShader->mUsesPointSize;
      std::string varyingSemantic = (mUsesPointSize && shaderModel >= 3) ? "COLOR" : "TEXCOORD";
      std::string targetSemantic = (shaderModel >= 4) ? "SV_Target" : "COLOR";
      std::string positionSemantic = (shaderModel >= 4) ? "SV_POSITION" : "POSITION";
  
      vertexHLSL += "struct VS_INPUT\n"
                    "{\n";
  
      int semanticIndex = 0;
      for (AttributeArray::iterator attribute = vertexShader->mAttributes.begin(); attribute != vertexShader->mAttributes.end(); attribute++)
      {
          switch (attribute->type)
          {
            case GL_FLOAT:      vertexHLSL += "    float ";    break;
            case GL_FLOAT_VEC2: vertexHLSL += "    float2 ";   break;
            case GL_FLOAT_VEC3: vertexHLSL += "    float3 ";   break;
            case GL_FLOAT_VEC4: vertexHLSL += "    float4 ";   break;
            case GL_FLOAT_MAT2: vertexHLSL += "    float2x2 "; break;
            case GL_FLOAT_MAT3: vertexHLSL += "    float3x3 "; break;
            case GL_FLOAT_MAT4: vertexHLSL += "    float4x4 "; break;
            default:  UNREACHABLE();
          }
  
          vertexHLSL += decorateAttribute(attribute->name) + " : TEXCOORD" + str(semanticIndex) + ";\n";
  
          semanticIndex += VariableRowCount(attribute->type);
      }
  
      vertexHLSL += "};\n"
                    "\n"
                    "struct VS_OUTPUT\n"
                    "{\n";
  
      for (int r = 0; r < registers; r++)
      {
          int registerSize = packing[r][3] ? 4 : (packing[r][2] ? 3 : (packing[r][1] ? 2 : 1));
  
          vertexHLSL += "    float" + str(registerSize) + " v" + str(r) + " : " + varyingSemantic + str(r) + ";\n";
      }
  
      if (fragmentShader->mUsesFragCoord)
      {
          vertexHLSL += "    float4 gl_FragCoord : " + varyingSemantic + str(registers) + ";\n";
      }
  
      if (vertexShader->mUsesPointSize && shaderModel >= 3)
      {
          vertexHLSL += "    float gl_PointSize : PSIZE;\n";
      }
  
      vertexHLSL += "    float4 gl_Position : " + positionSemantic + ";\n"
                    "};\n"
                    "\n"
                    "VS_OUTPUT main(VS_INPUT input)\n"
                    "{\n";
  
      for (AttributeArray::iterator attribute = vertexShader->mAttributes.begin(); attribute != vertexShader->mAttributes.end(); attribute++)
      {
          vertexHLSL += "    " + decorateAttribute(attribute->name) + " = ";
  
          if (VariableRowCount(attribute->type) > 1)   // Matrix
          {
              vertexHLSL += "transpose";
          }
  
          vertexHLSL += "(input." + decorateAttribute(attribute->name) + ");\n";
      }
  
      vertexHLSL += "\n"
                    "    gl_main();\n"
                    "\n"
                    "    VS_OUTPUT output;\n"
                    "    output.gl_Position.x = gl_Position.x - dx_HalfPixelSize.x * gl_Position.w;\n"
                    "    output.gl_Position.y = -(gl_Position.y + dx_HalfPixelSize.y * gl_Position.w);\n"
                    "    output.gl_Position.z = (gl_Position.z + gl_Position.w) * 0.5;\n"
                    "    output.gl_Position.w = gl_Position.w;\n";
  
      if (vertexShader->mUsesPointSize && shaderModel >= 3)
      {
          vertexHLSL += "    output.gl_PointSize = gl_PointSize;\n";
      }
  
      if (fragmentShader->mUsesFragCoord)
      {
          vertexHLSL += "    output.gl_FragCoord = gl_Position;\n";
      }
  
      for (VaryingList::iterator varying = vertexShader->mVaryings.begin(); varying != vertexShader->mVaryings.end(); varying++)
      {
          if (varying->reg >= 0)
          {
              for (int i = 0; i < varying->size; i++)
              {
                  int rows = VariableRowCount(varying->type);
  
                  for (int j = 0; j < rows; j++)
                  {
                      int r = varying->reg + i * rows + j;
                      vertexHLSL += "    output.v" + str(r);
  
                      bool sharedRegister = false;   // Register used by multiple varyings
                      
                      for (int x = 0; x < 4; x++)
                      {
                          if (packing[r][x] && packing[r][x] != packing[r][0])
                          {
                              sharedRegister = true;
                              break;
                          }
                      }
  
                      if(sharedRegister)
                      {
                          vertexHLSL += ".";
  
                          for (int x = 0; x < 4; x++)
                          {
                              if (packing[r][x] == &*varying)
                              {
                                  switch(x)
                                  {
                                    case 0: vertexHLSL += "x"; break;
                                    case 1: vertexHLSL += "y"; break;
                                    case 2: vertexHLSL += "z"; break;
                                    case 3: vertexHLSL += "w"; break;
                                  }
                              }
                          }
                      }
  
                      vertexHLSL += " = " + varying->name;
                      
                      if (varying->array)
                      {
                          vertexHLSL += "[" + str(i) + "]";
                      }
  
                      if (rows > 1)
                      {
                          vertexHLSL += "[" + str(j) + "]";
                      }
                      
                      vertexHLSL += ";\n";
                  }
              }
          }
      }
  
      vertexHLSL += "\n"
                    "    return output;\n"
                    "}\n";
  
      pixelHLSL += "struct PS_INPUT\n"
                   "{\n";
      
      for (VaryingList::iterator varying = fragmentShader->mVaryings.begin(); varying != fragmentShader->mVaryings.end(); varying++)
      {
          if (varying->reg >= 0)
          {
              for (int i = 0; i < varying->size; i++)
              {
                  int rows = VariableRowCount(varying->type);
                  for (int j = 0; j < rows; j++)
                  {
                      std::string n = str(varying->reg + i * rows + j);
                      pixelHLSL += "    float" + str(VariableColumnCount(varying->type)) + " v" + n + " : " + varyingSemantic + n + ";\n";
                  }
              }
          }
          else UNREACHABLE();
      }
  
      if (fragmentShader->mUsesFragCoord)
      {
          pixelHLSL += "    float4 gl_FragCoord : " + varyingSemantic + str(registers) + ";\n";
          
          if (shaderModel >= 4)
          {
              pixelHLSL += "    float4 dx_VPos : SV_Position;\n";
          }
          else if (shaderModel >= 3)
          {
              pixelHLSL += "    float2 dx_VPos : VPOS;\n";
          }
      }
  
      if (fragmentShader->mUsesPointCoord && shaderModel == 3)
      {
          pixelHLSL += "    float2 gl_PointCoord : TEXCOORD0;\n";
      }
  
      pixelHLSL += "};\n"
                   "\n"
                   "struct PS_OUTPUT\n"
                   "{\n"
                   "    float4 gl_Color[1] : " + targetSemantic + ";\n"
                   "};\n"
                   "\n";
      
      if (fragmentShader->mUsesFrontFacing)
      {
          if (shaderModel >= 4)
          {
              pixelHLSL += "PS_OUTPUT main(PS_INPUT input, bool isFrontFace : SV_IsFrontFace)\n"
                           "{\n";
          }
          else
          {
              pixelHLSL += "PS_OUTPUT main(PS_INPUT input, float vFace : VFACE)\n"
                           "{\n";
          }
      }
      else
      {
          pixelHLSL += "PS_OUTPUT main(PS_INPUT input)\n"
                       "{\n";
      }
  
      if (fragmentShader->mUsesFragCoord)
      {
          pixelHLSL += "    float rhw = 1.0 / input.gl_FragCoord.w;\n";
          
          if (shaderModel >= 4)
          {
              pixelHLSL += "    gl_FragCoord.x = input.dx_VPos.x;\n"
                           "    gl_FragCoord.y = input.dx_VPos.y;\n";
          }
          else if (shaderModel >= 3)
          {
              pixelHLSL += "    gl_FragCoord.x = input.dx_VPos.x + 0.5;\n"
                           "    gl_FragCoord.y = input.dx_VPos.y + 0.5;\n";
          }
          else
          {
              // dx_Coord contains the viewport width/2, height/2, center.x and center.y. See Context::applyRenderTarget()
              pixelHLSL += "    gl_FragCoord.x = (input.gl_FragCoord.x * rhw) * dx_Coord.x + dx_Coord.z;\n"
                           "    gl_FragCoord.y = (input.gl_FragCoord.y * rhw) * dx_Coord.y + dx_Coord.w;\n";
          }
          
          pixelHLSL += "    gl_FragCoord.z = (input.gl_FragCoord.z * rhw) * dx_DepthFront.x + dx_DepthFront.y;\n"
                       "    gl_FragCoord.w = rhw;\n";
      }
  
      if (fragmentShader->mUsesPointCoord && shaderModel == 3)
      {
          pixelHLSL += "    gl_PointCoord.x = input.gl_PointCoord.x;\n";
          pixelHLSL += "    gl_PointCoord.y = 1.0 - input.gl_PointCoord.y;\n";
      }
  
      if (fragmentShader->mUsesFrontFacing)
      {
          if (shaderModel <= 3)
          {
              pixelHLSL += "    gl_FrontFacing = (vFace * dx_DepthFront.z >= 0.0);\n";
          }
          else
          {
              pixelHLSL += "    gl_FrontFacing = isFrontFace;\n";
          }
      }
  
      for (VaryingList::iterator varying = fragmentShader->mVaryings.begin(); varying != fragmentShader->mVaryings.end(); varying++)
      {
          if (varying->reg >= 0)
          {
              for (int i = 0; i < varying->size; i++)
              {
                  int rows = VariableRowCount(varying->type);
                  for (int j = 0; j < rows; j++)
                  {
                      std::string n = str(varying->reg + i * rows + j);
                      pixelHLSL += "    " + varying->name;
  
                      if (varying->array)
                      {
                          pixelHLSL += "[" + str(i) + "]";
                      }
  
                      if (rows > 1)
                      {
                          pixelHLSL += "[" + str(j) + "]";
                      }
  
                      switch (VariableColumnCount(varying->type))
                      {
                        case 1: pixelHLSL += " = input.v" + n + ".x;\n";   break;
                        case 2: pixelHLSL += " = input.v" + n + ".xy;\n";  break;
                        case 3: pixelHLSL += " = input.v" + n + ".xyz;\n"; break;
                        case 4: pixelHLSL += " = input.v" + n + ";\n";     break;
                        default: UNREACHABLE();
                      }
                  }
              }
          }
          else UNREACHABLE();
      }
  
      pixelHLSL += "\n"
                   "    gl_main();\n"
                   "\n"
                   "    PS_OUTPUT output;\n"                 
                   "    output.gl_Color[0] = gl_Color[0];\n"
                   "\n"
                   "    return output;\n"
                   "}\n";
  
      return true;
  }
  
  bool ProgramBinary::load(InfoLog &infoLog, const void *binary, GLsizei length)
  {
      BinaryInputStream stream(binary, length);
  
      int format = 0;
      stream.read(&format);
      if (format != GL_PROGRAM_BINARY_ANGLE)
      {
          infoLog.append("Invalid program binary format.");
          return false;
      }
  
      int version = 0;
      stream.read(&version);
      if (version != VERSION_DWORD)
      {
          infoLog.append("Invalid program binary version.");
          return false;
      }
  
      for (int i = 0; i < MAX_VERTEX_ATTRIBS; ++i)
      {
          stream.read(&mLinkedAttribute[i].type);
          std::string name;
          stream.read(&name);
          mLinkedAttribute[i].name = name;
          stream.read(&mSemanticIndex[i]);
      }
  
      for (unsigned int i = 0; i < MAX_TEXTURE_IMAGE_UNITS; ++i)
      {
          stream.read(&mSamplersPS[i].active);
          stream.read(&mSamplersPS[i].logicalTextureUnit);
          
          int textureType;
          stream.read(&textureType);
          mSamplersPS[i].textureType = (TextureType) textureType;
      }
  
      for (unsigned int i = 0; i < IMPLEMENTATION_MAX_VERTEX_TEXTURE_IMAGE_UNITS; ++i)
      {
          stream.read(&mSamplersVS[i].active);
          stream.read(&mSamplersVS[i].logicalTextureUnit);
          
          int textureType;
          stream.read(&textureType);
          mSamplersVS[i].textureType = (TextureType) textureType;
      }
  
      stream.read(&mUsedVertexSamplerRange);
      stream.read(&mUsedPixelSamplerRange);
      stream.read(&mUsesPointSize);
  
      unsigned int size;
      stream.read(&size);
      if (stream.error())
      {
          infoLog.append("Invalid program binary.");
          return false;
      }
  
      mUniforms.resize(size);
      for (unsigned int i = 0; i < size; ++i)
      {
          GLenum type;
          std::string name;
          unsigned int arraySize;
  
          stream.read(&type);
          stream.read(&name);
          stream.read(&arraySize);
  
          mUniforms[i] = new Uniform(type, name, arraySize);
          
          stream.read(&mUniforms[i]->psRegisterIndex);
          stream.read(&mUniforms[i]->vsRegisterIndex);
          stream.read(&mUniforms[i]->registerCount);
      }
  
      stream.read(&size);
      if (stream.error())
      {
          infoLog.append("Invalid program binary.");
          return false;
      }
  
      mUniformIndex.resize(size);
      for (unsigned int i = 0; i < size; ++i)
      {
          stream.read(&mUniformIndex[i].name);
          stream.read(&mUniformIndex[i].element);
          stream.read(&mUniformIndex[i].index);
      }
  
      unsigned int pixelShaderSize;
      stream.read(&pixelShaderSize);
  
      unsigned int vertexShaderSize;
      stream.read(&vertexShaderSize);
  
      const char *ptr = (const char*) binary + stream.offset();
  
      const GUID *binaryIdentifier = (const GUID *) ptr;
      ptr += sizeof(GUID);
  
      GUID identifier = mRenderer->getAdapterIdentifier();
      if (memcmp(&identifier, binaryIdentifier, sizeof(GUID)) != 0)
      {
          infoLog.append("Invalid program binary.");
          return false;
      }
  
      const char *pixelShaderFunction = ptr;
      ptr += pixelShaderSize;
  
      const char *vertexShaderFunction = ptr;
      ptr += vertexShaderSize;
  
      mPixelExecutable = mRenderer->loadExecutable(reinterpret_cast<const DWORD*>(pixelShaderFunction),
                                                   pixelShaderSize, GL_FRAGMENT_SHADER);
      if (!mPixelExecutable)
      {
          infoLog.append("Could not create pixel shader.");
          return false;
      }
  
      mVertexExecutable = mRenderer->loadExecutable(reinterpret_cast<const DWORD*>(vertexShaderFunction),
                                                    vertexShaderSize, GL_VERTEX_SHADER);
      if (!mVertexExecutable)
      {
          infoLog.append("Could not create vertex shader.");
          delete mPixelExecutable;
          mPixelExecutable = NULL;
          return false;
      }
  
      return true;
  }
  
  bool ProgramBinary::save(void* binary, GLsizei bufSize, GLsizei *length)
  {
      BinaryOutputStream stream;
  
      stream.write(GL_PROGRAM_BINARY_ANGLE);
      stream.write(VERSION_DWORD);
  
      for (unsigned int i = 0; i < MAX_VERTEX_ATTRIBS; ++i)
      {
          stream.write(mLinkedAttribute[i].type);
          stream.write(mLinkedAttribute[i].name);
          stream.write(mSemanticIndex[i]);
      }
  
      for (unsigned int i = 0; i < MAX_TEXTURE_IMAGE_UNITS; ++i)
      {
          stream.write(mSamplersPS[i].active);
          stream.write(mSamplersPS[i].logicalTextureUnit);
          stream.write((int) mSamplersPS[i].textureType);
      }
  
      for (unsigned int i = 0; i < IMPLEMENTATION_MAX_VERTEX_TEXTURE_IMAGE_UNITS; ++i)
      {
          stream.write(mSamplersVS[i].active);
          stream.write(mSamplersVS[i].logicalTextureUnit);
          stream.write((int) mSamplersVS[i].textureType);
      }
  
      stream.write(mUsedVertexSamplerRange);
      stream.write(mUsedPixelSamplerRange);
      stream.write(mUsesPointSize);
  
      stream.write(mUniforms.size());
      for (unsigned int i = 0; i < mUniforms.size(); ++i)
      {
          stream.write(mUniforms[i]->type);
          stream.write(mUniforms[i]->name);
          stream.write(mUniforms[i]->arraySize);
  
          stream.write(mUniforms[i]->psRegisterIndex);
          stream.write(mUniforms[i]->vsRegisterIndex);
          stream.write(mUniforms[i]->registerCount);
      }
  
      stream.write(mUniformIndex.size());
      for (unsigned int i = 0; i < mUniformIndex.size(); ++i)
      {
          stream.write(mUniformIndex[i].name);
          stream.write(mUniformIndex[i].element);
          stream.write(mUniformIndex[i].index);
      }
  
      UINT pixelShaderSize = mPixelExecutable->getLength();
      stream.write(pixelShaderSize);
  
      UINT vertexShaderSize = mVertexExecutable->getLength();
      stream.write(vertexShaderSize);
  
      GUID identifier = mRenderer->getAdapterIdentifier();
  
      GLsizei streamLength = stream.length();
      const void *streamData = stream.data();
  
      GLsizei totalLength = streamLength + sizeof(GUID) + pixelShaderSize + vertexShaderSize;
      if (totalLength > bufSize)
      {
          if (length)
          {
              *length = 0;
          }
  
          return false;
      }
  
      if (binary)
      {
          char *ptr = (char*) binary;
  
          memcpy(ptr, streamData, streamLength);
          ptr += streamLength;
  
          memcpy(ptr, &identifier, sizeof(GUID));
          ptr += sizeof(GUID);
  
          memcpy(ptr, mPixelExecutable->getFunction(), pixelShaderSize);
          ptr += pixelShaderSize;
  
          memcpy(ptr, mVertexExecutable->getFunction(), vertexShaderSize);
          ptr += vertexShaderSize;
  
          ASSERT(ptr - totalLength == binary);
      }
  
      if (length)
      {
          *length = totalLength;
      }
  
      return true;
  }
  
  GLint ProgramBinary::getLength()
  {
      GLint length;
      if (save(NULL, INT_MAX, &length))
      {
          return length;
      }
      else
      {
          return 0;
      }
  }
  
  bool ProgramBinary::link(InfoLog &infoLog, const AttributeBindings &attributeBindings, FragmentShader *fragmentShader, VertexShader *vertexShader)
  {
      if (!fragmentShader || !fragmentShader->isCompiled())
      {
          return false;
      }
  
      if (!vertexShader || !vertexShader->isCompiled())
      {
          return false;
      }
  
      std::string pixelHLSL = fragmentShader->getHLSL();
      std::string vertexHLSL = vertexShader->getHLSL();
  
      if (!linkVaryings(infoLog, pixelHLSL, vertexHLSL, fragmentShader, vertexShader))
      {
          return false;
      }
  
      bool success = true;
      mVertexExecutable = mRenderer->compileToExecutable(infoLog, vertexHLSL.c_str(), GL_VERTEX_SHADER);
      mPixelExecutable = mRenderer->compileToExecutable(infoLog, pixelHLSL.c_str(), GL_FRAGMENT_SHADER);
  
      if (!mVertexExecutable || !mPixelExecutable)
      {
          infoLog.append("Failed to create D3D shaders.");
          success = false;
  
          delete mVertexExecutable;
          mVertexExecutable = NULL;
          delete mPixelExecutable;
          mPixelExecutable = NULL;
      }
  
      if (!linkAttributes(infoLog, attributeBindings, fragmentShader, vertexShader))
      {
          success = false;
      }
  
      if (!linkUniforms(infoLog, vertexShader->getUniforms(), fragmentShader->getUniforms()))
      {
          success = false;
      }
  
      return success;
  }
  
  // Determines the mapping between GL attributes and Direct3D 9 vertex stream usage indices
  bool ProgramBinary::linkAttributes(InfoLog &infoLog, const AttributeBindings &attributeBindings, FragmentShader *fragmentShader, VertexShader *vertexShader)
  {
      unsigned int usedLocations = 0;
  
      // Link attributes that have a binding location
      for (AttributeArray::iterator attribute = vertexShader->mAttributes.begin(); attribute != vertexShader->mAttributes.end(); attribute++)
      {
          int location = attributeBindings.getAttributeBinding(attribute->name);
  
          if (location != -1)   // Set by glBindAttribLocation
          {
              if (!mLinkedAttribute[location].name.empty())
              {
                  // Multiple active attributes bound to the same location; not an error
              }
  
              mLinkedAttribute[location] = *attribute;
  
              int rows = VariableRowCount(attribute->type);
  
              if (rows + location > MAX_VERTEX_ATTRIBS)
              {
                  infoLog.append("Active attribute (%s) at location %d is too big to fit", attribute->name.c_str(), location);
  
                  return false;
              }
  
              for (int i = 0; i < rows; i++)
              {
                  usedLocations |= 1 << (location + i);
              }
          }
      }
  
      // Link attributes that don't have a binding location
      for (AttributeArray::iterator attribute = vertexShader->mAttributes.begin(); attribute != vertexShader->mAttributes.end(); attribute++)
      {
          int location = attributeBindings.getAttributeBinding(attribute->name);
  
          if (location == -1)   // Not set by glBindAttribLocation
          {
              int rows = VariableRowCount(attribute->type);
              int availableIndex = AllocateFirstFreeBits(&usedLocations, rows, MAX_VERTEX_ATTRIBS);
  
              if (availableIndex == -1 || availableIndex + rows > MAX_VERTEX_ATTRIBS)
              {
                  infoLog.append("Too many active attributes (%s)", attribute->name.c_str());
  
                  return false;   // Fail to link
              }
  
              mLinkedAttribute[availableIndex] = *attribute;
          }
      }
  
      for (int attributeIndex = 0; attributeIndex < MAX_VERTEX_ATTRIBS; )
      {
          int index = vertexShader->getSemanticIndex(mLinkedAttribute[attributeIndex].name);
          int rows = std::max(VariableRowCount(mLinkedAttribute[attributeIndex].type), 1);
  
          for (int r = 0; r < rows; r++)
          {
              mSemanticIndex[attributeIndex++] = index++;
          }
      }
  
      return true;
  }
  
  bool ProgramBinary::linkUniforms(InfoLog &infoLog, const sh::ActiveUniforms &vertexUniforms, const sh::ActiveUniforms &fragmentUniforms)
  {
      for (sh::ActiveUniforms::const_iterator uniform = vertexUniforms.begin(); uniform != vertexUniforms.end(); uniform++)
      {
          if (!defineUniform(GL_VERTEX_SHADER, *uniform, infoLog))
          {
              return false;
          }
      }
  
      for (sh::ActiveUniforms::const_iterator uniform = fragmentUniforms.begin(); uniform != fragmentUniforms.end(); uniform++)
      {
          if (!defineUniform(GL_FRAGMENT_SHADER, *uniform, infoLog))
          {
              return false;
          }
      }
  
      return true;
  }
  
  bool ProgramBinary::defineUniform(GLenum shader, const sh::Uniform &constant, InfoLog &infoLog)
  {
      if (constant.type == GL_SAMPLER_2D ||
          constant.type == GL_SAMPLER_CUBE)
      {
          unsigned int samplerIndex = constant.registerIndex;
              
          do
          {
              if (shader == GL_VERTEX_SHADER)
              {
                  if (samplerIndex < mRenderer->getMaxVertexTextureImageUnits())
                  {
                      mSamplersVS[samplerIndex].active = true;
                      mSamplersVS[samplerIndex].textureType = (constant.type == GL_SAMPLER_CUBE) ? TEXTURE_CUBE : TEXTURE_2D;
                      mSamplersVS[samplerIndex].logicalTextureUnit = 0;
                      mUsedVertexSamplerRange = std::max(samplerIndex + 1, mUsedVertexSamplerRange);
                  }
                  else
                  {
                      infoLog.append("Vertex shader sampler count exceeds the maximum vertex texture units (%d).", mRenderer->getMaxVertexTextureImageUnits());
                      return false;
                  }
              }
              else if (shader == GL_FRAGMENT_SHADER)
              {
                  if (samplerIndex < MAX_TEXTURE_IMAGE_UNITS)
                  {
                      mSamplersPS[samplerIndex].active = true;
                      mSamplersPS[samplerIndex].textureType = (constant.type == GL_SAMPLER_CUBE) ? TEXTURE_CUBE : TEXTURE_2D;
                      mSamplersPS[samplerIndex].logicalTextureUnit = 0;
                      mUsedPixelSamplerRange = std::max(samplerIndex + 1, mUsedPixelSamplerRange);
                  }
                  else
                  {
                      infoLog.append("Pixel shader sampler count exceeds MAX_TEXTURE_IMAGE_UNITS (%d).", MAX_TEXTURE_IMAGE_UNITS);
                      return false;
                  }
              }
              else UNREACHABLE();
  
              samplerIndex++;
          }
          while (samplerIndex < constant.registerIndex + constant.arraySize);
      }
  
      Uniform *uniform = NULL;
      GLint location = getUniformLocation(constant.name);
  
      if (location >= 0)   // Previously defined, types must match
      {
          uniform = mUniforms[mUniformIndex[location].index];
  
          if (uniform->type != constant.type)
          {
              return false;
          }
      }
      else
      {
          uniform = new Uniform(constant.type, constant.name, constant.arraySize);
      }
  
      if (!uniform)
      {
          return false;
      }
  
      if (shader == GL_FRAGMENT_SHADER)
      {
          uniform->psRegisterIndex = constant.registerIndex;
      }
      else if (shader == GL_VERTEX_SHADER)
      {
          uniform->vsRegisterIndex = constant.registerIndex;
      }
      else UNREACHABLE();
  
      if (location >= 0)
      {
          return uniform->type == constant.type;
      }
  
      mUniforms.push_back(uniform);
      unsigned int uniformIndex = mUniforms.size() - 1;
  
      for (unsigned int i = 0; i < uniform->elementCount(); i++)
      {
          mUniformIndex.push_back(UniformLocation(constant.name, i, uniformIndex));
      }
  
      return true;
  }
  
  // This method needs to match OutputHLSL::decorate
  std::string ProgramBinary::decorateAttribute(const std::string &name)
  {
      if (name.compare(0, 3, "gl_") != 0 && name.compare(0, 3, "dx_") != 0)
      {
          return "_" + name;
      }
      
      return name;
  }
  
  bool ProgramBinary::isValidated() const 
  {
      return mValidated;
  }
  
  void ProgramBinary::getActiveAttribute(GLuint index, GLsizei bufsize, GLsizei *length, GLint *size, GLenum *type, GLchar *name)
  {
      // Skip over inactive attributes
      unsigned int activeAttribute = 0;
      unsigned int attribute;
      for (attribute = 0; attribute < MAX_VERTEX_ATTRIBS; attribute++)
      {
          if (mLinkedAttribute[attribute].name.empty())
          {
              continue;
          }
  
          if (activeAttribute == index)
          {
              break;
          }
  
          activeAttribute++;
      }
  
      if (bufsize > 0)
      {
          const char *string = mLinkedAttribute[attribute].name.c_str();
  
          strncpy(name, string, bufsize);
          name[bufsize - 1] = '\0';
  
          if (length)
          {
              *length = strlen(name);
          }
      }
  
      *size = 1;   // Always a single 'type' instance
  
      *type = mLinkedAttribute[attribute].type;
  }
  
  GLint ProgramBinary::getActiveAttributeCount()
  {
      int count = 0;
  
      for (int attributeIndex = 0; attributeIndex < MAX_VERTEX_ATTRIBS; attributeIndex++)
      {
          if (!mLinkedAttribute[attributeIndex].name.empty())
          {
              count++;
          }
      }
  
      return count;
  }
  
  GLint ProgramBinary::getActiveAttributeMaxLength()
  {
      int maxLength = 0;
  
      for (int attributeIndex = 0; attributeIndex < MAX_VERTEX_ATTRIBS; attributeIndex++)
      {
          if (!mLinkedAttribute[attributeIndex].name.empty())
          {
              maxLength = std::max((int)(mLinkedAttribute[attributeIndex].name.length() + 1), maxLength);
          }
      }
  
      return maxLength;
  }
  
  void ProgramBinary::getActiveUniform(GLuint index, GLsizei bufsize, GLsizei *length, GLint *size, GLenum *type, GLchar *name)
  {
      ASSERT(index < mUniforms.size());   // index must be smaller than getActiveUniformCount()
  
      if (bufsize > 0)
      {
          std::string string = mUniforms[index]->name;
  
          if (mUniforms[index]->isArray())
          {
              string += "[0]";
          }
  
          strncpy(name, string.c_str(), bufsize);
          name[bufsize - 1] = '\0';
  
          if (length)
          {
              *length = strlen(name);
          }
      }
  
      *size = mUniforms[index]->elementCount();
  
      *type = mUniforms[index]->type;
  }
  
  GLint ProgramBinary::getActiveUniformCount()
  {
      return mUniforms.size();
  }
  
  GLint ProgramBinary::getActiveUniformMaxLength()
  {
      int maxLength = 0;
  
      unsigned int numUniforms = mUniforms.size();
      for (unsigned int uniformIndex = 0; uniformIndex < numUniforms; uniformIndex++)
      {
          if (!mUniforms[uniformIndex]->name.empty())
          {
              int length = (int)(mUniforms[uniformIndex]->name.length() + 1);
              if (mUniforms[uniformIndex]->isArray())
              {
                  length += 3;  // Counting in "[0]".
              }
              maxLength = std::max(length, maxLength);
          }
      }
  
      return maxLength;
  }
  
  void ProgramBinary::validate(InfoLog &infoLog)
  {
      applyUniforms();
      if (!validateSamplers(&infoLog))
      {
          mValidated = false;
      }
      else
      {
          mValidated = true;
      }
  }
  
  bool ProgramBinary::validateSamplers(InfoLog *infoLog)
  {
      // if any two active samplers in a program are of different types, but refer to the same
      // texture image unit, and this is the current program, then ValidateProgram will fail, and
      // DrawArrays and DrawElements will issue the INVALID_OPERATION error.
  
      const unsigned int maxCombinedTextureImageUnits = getContext()->getMaximumCombinedTextureImageUnits();
      TextureType textureUnitType[IMPLEMENTATION_MAX_COMBINED_TEXTURE_IMAGE_UNITS];
  
      for (unsigned int i = 0; i < IMPLEMENTATION_MAX_COMBINED_TEXTURE_IMAGE_UNITS; ++i)
      {
          textureUnitType[i] = TEXTURE_UNKNOWN;
      }
  
      for (unsigned int i = 0; i < mUsedPixelSamplerRange; ++i)
      {
          if (mSamplersPS[i].active)
          {
              unsigned int unit = mSamplersPS[i].logicalTextureUnit;
              
              if (unit >= maxCombinedTextureImageUnits)
              {
                  if (infoLog)
                  {
                      infoLog->append("Sampler uniform (%d) exceeds IMPLEMENTATION_MAX_COMBINED_TEXTURE_IMAGE_UNITS (%d)", unit, maxCombinedTextureImageUnits);
                  }
  
                  return false;
              }
  
              if (textureUnitType[unit] != TEXTURE_UNKNOWN)
              {
                  if (mSamplersPS[i].textureType != textureUnitType[unit])
                  {
                      if (infoLog)
                      {
                          infoLog->append("Samplers of conflicting types refer to the same texture image unit (%d).", unit);
                      }
  
                      return false;
                  }
              }
              else
              {
                  textureUnitType[unit] = mSamplersPS[i].textureType;
              }
          }
      }
  
      for (unsigned int i = 0; i < mUsedVertexSamplerRange; ++i)
      {
          if (mSamplersVS[i].active)
          {
              unsigned int unit = mSamplersVS[i].logicalTextureUnit;
              
              if (unit >= maxCombinedTextureImageUnits)
              {
                  if (infoLog)
                  {
                      infoLog->append("Sampler uniform (%d) exceeds IMPLEMENTATION_MAX_COMBINED_TEXTURE_IMAGE_UNITS (%d)", unit, maxCombinedTextureImageUnits);
                  }
  
                  return false;
              }
  
              if (textureUnitType[unit] != TEXTURE_UNKNOWN)
              {
                  if (mSamplersVS[i].textureType != textureUnitType[unit])
                  {
                      if (infoLog)
                      {
                          infoLog->append("Samplers of conflicting types refer to the same texture image unit (%d).", unit);
                      }
  
                      return false;
                  }
              }
              else
              {
                  textureUnitType[unit] = mSamplersVS[i].textureType;
              }
          }
      }
  
      return true;
  }
  
  ProgramBinary::Sampler::Sampler() : active(false), logicalTextureUnit(0), textureType(TEXTURE_2D)
  {
  }
  
  }
  

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