kc3-lang/angle/src/libANGLE/renderer/d3d/DynamicHLSL.cpp

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• Author : Jamie Madill
  Date : 2017-08-16 14:58:35
  Hash : a836b466
  Message : D3D11: Allow no-op pixel shader output. On HLSL 4+, the debug runtime issues a warning when we try to render to a color output in the pixel shader that doesn't have a matching render target bound. This happens when doing a depth or stencil-only render pass. We only need to bind a dummy output in HLSL 3, so tighten the workaround we had in place and fix the warning for D3D11. BUG=angleproject:2025 Change-Id: I16ba9e907f3a6e59afff93fe4583d084cbdf42c5 Reviewed-on: https://chromium-review.googlesource.com/617268 Reviewed-by: Geoff Lang <geofflang@chromium.org> Commit-Queue: Jamie Madill <jmadill@chromium.org>

• src/libANGLE/renderer/d3d/DynamicHLSL.cpp

• //
  // Copyright (c) 2014 The ANGLE Project Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  //
  // DynamicHLSL.cpp: Implementation for link and run-time HLSL generation
  //
  
  #include "libANGLE/renderer/d3d/DynamicHLSL.h"
  
  #include "common/utilities.h"
  #include "compiler/translator/blocklayoutHLSL.h"
  #include "libANGLE/Context.h"
  #include "libANGLE/Program.h"
  #include "libANGLE/Shader.h"
  #include "libANGLE/VaryingPacking.h"
  #include "libANGLE/formatutils.h"
  #include "libANGLE/renderer/d3d/ProgramD3D.h"
  #include "libANGLE/renderer/d3d/RendererD3D.h"
  #include "libANGLE/renderer/d3d/ShaderD3D.h"
  
  using namespace gl;
  
  namespace rx
  {
  
  namespace
  {
  
  // This class needs to match OutputHLSL::decorate
  class DecorateVariable final : angle::NonCopyable
  {
    public:
      explicit DecorateVariable(const std::string &str) : mName(str) {}
      const std::string &getName() const { return mName; }
  
    private:
      const std::string &mName;
  };
  
  std::ostream &operator<<(std::ostream &o, const DecorateVariable &dv)
  {
      if (dv.getName().compare(0, 3, "gl_") != 0)
      {
          o << "_";
      }
      o << dv.getName();
      return o;
  }
  
  const char *HLSLComponentTypeString(GLenum componentType)
  {
      switch (componentType)
      {
          case GL_UNSIGNED_INT:
              return "uint";
          case GL_INT:
              return "int";
          case GL_UNSIGNED_NORMALIZED:
          case GL_SIGNED_NORMALIZED:
          case GL_FLOAT:
              return "float";
          default:
              UNREACHABLE();
              return "not-component-type";
      }
  }
  
  void HLSLComponentTypeString(std::ostringstream &ostream, GLenum componentType, int componentCount)
  {
      ostream << HLSLComponentTypeString(componentType);
      if (componentCount > 1)
      {
          ostream << componentCount;
      }
  }
  
  const char *HLSLMatrixTypeString(GLenum type)
  {
      switch (type)
      {
          case GL_FLOAT_MAT2:
              return "float2x2";
          case GL_FLOAT_MAT3:
              return "float3x3";
          case GL_FLOAT_MAT4:
              return "float4x4";
          case GL_FLOAT_MAT2x3:
              return "float2x3";
          case GL_FLOAT_MAT3x2:
              return "float3x2";
          case GL_FLOAT_MAT2x4:
              return "float2x4";
          case GL_FLOAT_MAT4x2:
              return "float4x2";
          case GL_FLOAT_MAT3x4:
              return "float3x4";
          case GL_FLOAT_MAT4x3:
              return "float4x3";
          default:
              UNREACHABLE();
              return "not-matrix-type";
      }
  }
  
  void HLSLTypeString(std::ostringstream &ostream, GLenum type)
  {
      if (gl::IsMatrixType(type))
      {
          ostream << HLSLMatrixTypeString(type);
          return;
      }
  
      HLSLComponentTypeString(ostream, gl::VariableComponentType(type),
                              gl::VariableComponentCount(type));
  }
  
  const PixelShaderOutputVariable *FindOutputAtLocation(
      const std::vector<PixelShaderOutputVariable> &outputVariables,
      unsigned int location)
  {
      for (size_t variableIndex = 0; variableIndex < outputVariables.size(); ++variableIndex)
      {
          if (outputVariables[variableIndex].outputIndex == location)
          {
              return &outputVariables[variableIndex];
          }
      }
  
      return nullptr;
  }
  
  void WriteArrayString(std::ostringstream &strstr, unsigned int i)
  {
      static_assert(GL_INVALID_INDEX == UINT_MAX,
                    "GL_INVALID_INDEX must be equal to the max unsigned int.");
      if (i == UINT_MAX)
      {
          return;
      }
  
      strstr << "[";
      strstr << i;
      strstr << "]";
  }
  
  constexpr const char *VERTEX_ATTRIBUTE_STUB_STRING = "@@ VERTEX ATTRIBUTES @@";
  constexpr const char *PIXEL_OUTPUT_STUB_STRING     = "@@ PIXEL OUTPUT @@";
  }  // anonymous namespace
  
  // DynamicHLSL implementation
  
  DynamicHLSL::DynamicHLSL(RendererD3D *const renderer) : mRenderer(renderer)
  {
  }
  
  std::string DynamicHLSL::generateVertexShaderForInputLayout(
      const std::string &sourceShader,
      const InputLayout &inputLayout,
      const std::vector<sh::Attribute> &shaderAttributes) const
  {
      std::ostringstream structStream;
      std::ostringstream initStream;
  
      structStream << "struct VS_INPUT\n"
                   << "{\n";
  
      int semanticIndex       = 0;
      unsigned int inputIndex = 0;
  
      // If gl_PointSize is used in the shader then pointsprites rendering is expected.
      // If the renderer does not support Geometry shaders then Instanced PointSprite emulation
      // must be used.
      bool usesPointSize = sourceShader.find("GL_USES_POINT_SIZE") != std::string::npos;
      bool useInstancedPointSpriteEmulation =
          usesPointSize && mRenderer->getWorkarounds().useInstancedPointSpriteEmulation;
  
      // Instanced PointSprite emulation requires additional entries in the
      // VS_INPUT structure to support the vertices that make up the quad vertices.
      // These values must be in sync with the cooresponding values added during inputlayout creation
      // in InputLayoutCache::applyVertexBuffers().
      //
      // The additional entries must appear first in the VS_INPUT layout because
      // Windows Phone 8 era devices require per vertex data to physically come
      // before per instance data in the shader.
      if (useInstancedPointSpriteEmulation)
      {
          structStream << "    float3 spriteVertexPos : SPRITEPOSITION0;\n"
                       << "    float2 spriteTexCoord : SPRITETEXCOORD0;\n";
      }
  
      for (size_t attributeIndex = 0; attributeIndex < shaderAttributes.size(); ++attributeIndex)
      {
          const sh::Attribute &shaderAttribute = shaderAttributes[attributeIndex];
          if (!shaderAttribute.name.empty())
          {
              ASSERT(inputIndex < MAX_VERTEX_ATTRIBS);
              VertexFormatType vertexFormatType =
                  inputIndex < inputLayout.size() ? inputLayout[inputIndex] : VERTEX_FORMAT_INVALID;
  
              // HLSL code for input structure
              if (IsMatrixType(shaderAttribute.type))
              {
                  // Matrix types are always transposed
                  structStream << "    "
                               << HLSLMatrixTypeString(TransposeMatrixType(shaderAttribute.type));
              }
              else
              {
                  GLenum componentType = mRenderer->getVertexComponentType(vertexFormatType);
  
                  if (shaderAttribute.name == "gl_InstanceID" ||
                      shaderAttribute.name == "gl_VertexID")
                  {
                      // The input types of the instance ID and vertex ID in HLSL (uint) differs from
                      // the ones in ESSL (int).
                      structStream << " uint";
                  }
                  else
                  {
                      structStream << "    ";
                      HLSLComponentTypeString(structStream, componentType,
                                              VariableComponentCount(shaderAttribute.type));
                  }
              }
  
              structStream << " " << DecorateVariable(shaderAttribute.name) << " : ";
  
              if (shaderAttribute.name == "gl_InstanceID")
              {
                  structStream << "SV_InstanceID";
              }
              else if (shaderAttribute.name == "gl_VertexID")
              {
                  structStream << "SV_VertexID";
              }
              else
              {
                  structStream << "TEXCOORD" << semanticIndex;
                  semanticIndex += VariableRegisterCount(shaderAttribute.type);
              }
  
              structStream << ";\n";
  
              // HLSL code for initialization
              initStream << "    " << DecorateVariable(shaderAttribute.name) << " = ";
  
              // Mismatched vertex attribute to vertex input may result in an undefined
              // data reinterpretation (eg for pure integer->float, float->pure integer)
              // TODO: issue warning with gl debug info extension, when supported
              if (IsMatrixType(shaderAttribute.type) ||
                  (mRenderer->getVertexConversionType(vertexFormatType) & VERTEX_CONVERT_GPU) != 0)
              {
                  GenerateAttributeConversionHLSL(vertexFormatType, shaderAttribute, initStream);
              }
              else
              {
                  initStream << "input." << DecorateVariable(shaderAttribute.name);
              }
  
              initStream << ";\n";
  
              inputIndex += VariableRowCount(TransposeMatrixType(shaderAttribute.type));
          }
      }
  
      structStream << "};\n"
                      "\n"
                      "void initAttributes(VS_INPUT input)\n"
                      "{\n"
                   << initStream.str() << "}\n";
  
      std::string vertexHLSL(sourceShader);
  
      size_t copyInsertionPos = vertexHLSL.find(VERTEX_ATTRIBUTE_STUB_STRING);
      vertexHLSL.replace(copyInsertionPos, strlen(VERTEX_ATTRIBUTE_STUB_STRING), structStream.str());
  
      return vertexHLSL;
  }
  
  std::string DynamicHLSL::generatePixelShaderForOutputSignature(
      const std::string &sourceShader,
      const std::vector<PixelShaderOutputVariable> &outputVariables,
      bool usesFragDepth,
      const std::vector<GLenum> &outputLayout) const
  {
      const int shaderModel      = mRenderer->getMajorShaderModel();
      std::string targetSemantic = (shaderModel >= 4) ? "SV_TARGET" : "COLOR";
      std::string depthSemantic  = (shaderModel >= 4) ? "SV_Depth" : "DEPTH";
  
      std::ostringstream declarationStream;
      std::ostringstream copyStream;
  
      declarationStream << "struct PS_OUTPUT\n"
                           "{\n";
  
      size_t numOutputs = outputLayout.size();
  
      // Workaround for HLSL 3.x: We can't do a depth/stencil only render, the runtime will complain.
      if (numOutputs == 0 && (shaderModel == 3 || !mRenderer->getShaderModelSuffix().empty()))
      {
          numOutputs = 1u;
      }
      const PixelShaderOutputVariable defaultOutput(GL_FLOAT_VEC4, "dummy", "float4(0, 0, 0, 1)", 0);
  
      for (size_t layoutIndex = 0; layoutIndex < numOutputs; ++layoutIndex)
      {
          GLenum binding = outputLayout.empty() ? GL_COLOR_ATTACHMENT0 : outputLayout[layoutIndex];
  
          if (binding != GL_NONE)
          {
              unsigned int location = (binding - GL_COLOR_ATTACHMENT0);
  
              const PixelShaderOutputVariable *outputVariable =
                  outputLayout.empty() ? &defaultOutput
                                       : FindOutputAtLocation(outputVariables, location);
  
              // OpenGL ES 3.0 spec $4.2.1
              // If [...] not all user-defined output variables are written, the values of fragment
              // colors
              // corresponding to unwritten variables are similarly undefined.
              if (outputVariable)
              {
                  declarationStream << "    ";
                  HLSLTypeString(declarationStream, outputVariable->type);
                  declarationStream << " " << outputVariable->name << " : " << targetSemantic
                                    << static_cast<int>(layoutIndex) << ";\n";
  
                  copyStream << "    output." << outputVariable->name << " = "
                             << outputVariable->source << ";\n";
              }
          }
      }
  
      if (usesFragDepth)
      {
          declarationStream << "    float gl_Depth : " << depthSemantic << ";\n";
          copyStream << "    output.gl_Depth = gl_Depth; \n";
      }
  
      declarationStream << "};\n"
                           "\n"
                           "PS_OUTPUT generateOutput()\n"
                           "{\n"
                           "    PS_OUTPUT output;\n"
                        << copyStream.str() << "    return output;\n"
                                               "}\n";
  
      std::string pixelHLSL(sourceShader);
  
      size_t outputInsertionPos = pixelHLSL.find(PIXEL_OUTPUT_STUB_STRING);
      pixelHLSL.replace(outputInsertionPos, strlen(PIXEL_OUTPUT_STUB_STRING),
                        declarationStream.str());
  
      return pixelHLSL;
  }
  
  void DynamicHLSL::generateVaryingLinkHLSL(const VaryingPacking &varyingPacking,
                                            const BuiltinInfo &builtins,
                                            bool programUsesPointSize,
                                            std::ostringstream &hlslStream) const
  {
      ASSERT(builtins.dxPosition.enabled);
      hlslStream << "{\n"
                 << "    float4 dx_Position : " << builtins.dxPosition.str() << ";\n";
  
      if (builtins.glPosition.enabled)
      {
          hlslStream << "    float4 gl_Position : " << builtins.glPosition.str() << ";\n";
      }
  
      if (builtins.glFragCoord.enabled)
      {
          hlslStream << "    float4 gl_FragCoord : " << builtins.glFragCoord.str() << ";\n";
      }
  
      if (builtins.glPointCoord.enabled)
      {
          hlslStream << "    float2 gl_PointCoord : " << builtins.glPointCoord.str() << ";\n";
      }
  
      if (builtins.glPointSize.enabled)
      {
          hlslStream << "    float gl_PointSize : " << builtins.glPointSize.str() << ";\n";
      }
  
      if (builtins.glViewIDOVR.enabled)
      {
          hlslStream << "    nointerpolation uint gl_ViewID_OVR : " << builtins.glViewIDOVR.str()
                     << ";\n";
      }
  
      if (builtins.glViewportIndex.enabled)
      {
          hlslStream << "    nointerpolation uint gl_ViewportIndex : "
                     << builtins.glViewportIndex.str() << ";\n";
      }
  
      std::string varyingSemantic =
          GetVaryingSemantic(mRenderer->getMajorShaderModel(), programUsesPointSize);
  
      for (const PackedVaryingRegister &registerInfo : varyingPacking.getRegisterList())
      {
          const auto &varying = *registerInfo.packedVarying->varying;
          ASSERT(!varying.isStruct());
  
          // TODO: Add checks to ensure D3D interpolation modifiers don't result in too many
          // registers being used.
          // For example, if there are N registers, and we have N vec3 varyings and 1 float
          // varying, then D3D will pack them into N registers.
          // If the float varying has the 'nointerpolation' modifier on it then we would need
          // N + 1 registers, and D3D compilation will fail.
  
          switch (registerInfo.packedVarying->interpolation)
          {
              case sh::INTERPOLATION_SMOOTH:
                  hlslStream << "    ";
                  break;
              case sh::INTERPOLATION_FLAT:
                  hlslStream << "    nointerpolation ";
                  break;
              case sh::INTERPOLATION_CENTROID:
                  hlslStream << "    centroid ";
                  break;
              default:
                  UNREACHABLE();
          }
  
          GLenum transposedType = gl::TransposeMatrixType(varying.type);
          GLenum componentType  = gl::VariableComponentType(transposedType);
          int columnCount       = gl::VariableColumnCount(transposedType);
          HLSLComponentTypeString(hlslStream, componentType, columnCount);
          unsigned int semanticIndex = registerInfo.semanticIndex;
          hlslStream << " v" << semanticIndex << " : " << varyingSemantic << semanticIndex << ";\n";
      }
  
      hlslStream << "};\n";
  }
  
  void DynamicHLSL::generateShaderLinkHLSL(const gl::Context *context,
                                           const gl::ProgramState &programData,
                                           const ProgramD3DMetadata &programMetadata,
                                           const VaryingPacking &varyingPacking,
                                           const BuiltinVaryingsD3D &builtinsD3D,
                                           std::string *pixelHLSL,
                                           std::string *vertexHLSL) const
  {
      ASSERT(pixelHLSL->empty() && vertexHLSL->empty());
  
      const auto &data                   = context->getContextState();
      gl::Shader *vertexShaderGL         = programData.getAttachedVertexShader();
      gl::Shader *fragmentShaderGL       = programData.getAttachedFragmentShader();
      const ShaderD3D *fragmentShader    = GetImplAs<ShaderD3D>(fragmentShaderGL);
      const int shaderModel              = mRenderer->getMajorShaderModel();
  
      // usesViewScale() isn't supported in the D3D9 renderer
      ASSERT(shaderModel >= 4 || !programMetadata.usesViewScale());
  
      bool useInstancedPointSpriteEmulation =
          programMetadata.usesPointSize() &&
          mRenderer->getWorkarounds().useInstancedPointSpriteEmulation;
  
      // Validation done in the compiler
      ASSERT(!fragmentShader->usesFragColor() || !fragmentShader->usesFragData());
  
      std::ostringstream vertexStream;
      vertexStream << vertexShaderGL->getTranslatedSource(context);
  
      // Instanced PointSprite emulation requires additional entries originally generated in the
      // GeometryShader HLSL. These include pointsize clamp values.
      if (useInstancedPointSpriteEmulation)
      {
          vertexStream << "static float minPointSize = "
                       << static_cast<int>(data.getCaps().minAliasedPointSize) << ".0f;\n"
                       << "static float maxPointSize = "
                       << static_cast<int>(data.getCaps().maxAliasedPointSize) << ".0f;\n";
      }
  
      // Add stub string to be replaced when shader is dynamically defined by its layout
      vertexStream << "\n" << std::string(VERTEX_ATTRIBUTE_STUB_STRING) << "\n";
  
      const auto &vertexBuiltins = builtinsD3D[SHADER_VERTEX];
  
      // Write the HLSL input/output declarations
      vertexStream << "struct VS_OUTPUT\n";
      generateVaryingLinkHLSL(varyingPacking, vertexBuiltins, builtinsD3D.usesPointSize(),
                              vertexStream);
      vertexStream << "\n"
                   << "VS_OUTPUT main(VS_INPUT input)\n"
                   << "{\n"
                   << "    initAttributes(input);\n";
  
      vertexStream << "\n"
                   << "    gl_main();\n"
                   << "\n"
                   << "    VS_OUTPUT output;\n";
  
      if (vertexBuiltins.glPosition.enabled)
      {
          vertexStream << "    output.gl_Position = gl_Position;\n";
      }
  
      if (vertexBuiltins.glViewIDOVR.enabled)
      {
          vertexStream << "   output.gl_ViewID_OVR = _ViewID_OVR;\n";
      }
  
      // On D3D9 or D3D11 Feature Level 9, we need to emulate large viewports using dx_ViewAdjust.
      if (shaderModel >= 4 && mRenderer->getShaderModelSuffix() == "")
      {
          vertexStream << "    output.dx_Position.x = gl_Position.x;\n";
  
          if (programMetadata.usesViewScale())
          {
              // This code assumes that dx_ViewScale.y = -1.0f when rendering to texture, and +1.0f
              // when rendering to the default framebuffer. No other values are valid.
              vertexStream << "    output.dx_Position.y = dx_ViewScale.y * gl_Position.y;\n";
          }
          else
          {
              vertexStream << "    output.dx_Position.y = - gl_Position.y;\n";
          }
  
          vertexStream << "    output.dx_Position.z = (gl_Position.z + gl_Position.w) * 0.5;\n"
                       << "    output.dx_Position.w = gl_Position.w;\n";
      }
      else
      {
          vertexStream << "    output.dx_Position.x = gl_Position.x * dx_ViewAdjust.z + "
                          "dx_ViewAdjust.x * gl_Position.w;\n";
  
          // If usesViewScale() is true and we're using the D3D11 renderer via Feature Level 9_*,
          // then we need to multiply the gl_Position.y by the viewScale.
          // usesViewScale() isn't supported when using the D3D9 renderer.
          if (programMetadata.usesViewScale() &&
              (shaderModel >= 4 && mRenderer->getShaderModelSuffix() != ""))
          {
              vertexStream << "    output.dx_Position.y = dx_ViewScale.y * (gl_Position.y * "
                              "dx_ViewAdjust.w + dx_ViewAdjust.y * gl_Position.w);\n";
          }
          else
          {
              vertexStream << "    output.dx_Position.y = -(gl_Position.y * dx_ViewAdjust.w + "
                              "dx_ViewAdjust.y * gl_Position.w);\n";
          }
  
          vertexStream << "    output.dx_Position.z = (gl_Position.z + gl_Position.w) * 0.5;\n"
                       << "    output.dx_Position.w = gl_Position.w;\n";
      }
  
      // We don't need to output gl_PointSize if we use are emulating point sprites via instancing.
      if (vertexBuiltins.glPointSize.enabled)
      {
          vertexStream << "    output.gl_PointSize = gl_PointSize;\n";
      }
  
      if (vertexBuiltins.glFragCoord.enabled)
      {
          vertexStream << "    output.gl_FragCoord = gl_Position;\n";
      }
  
      for (const PackedVaryingRegister &registerInfo : varyingPacking.getRegisterList())
      {
          const auto &packedVarying = *registerInfo.packedVarying;
          const auto &varying = *packedVarying.varying;
          ASSERT(!varying.isStruct());
  
          vertexStream << "    output.v" << registerInfo.semanticIndex << " = ";
  
          if (packedVarying.isStructField())
          {
              vertexStream << DecorateVariable(packedVarying.parentStructName) << ".";
          }
  
          vertexStream << DecorateVariable(varying.name);
  
          if (varying.isArray())
          {
              WriteArrayString(vertexStream, registerInfo.varyingArrayIndex);
          }
  
          if (VariableRowCount(varying.type) > 1)
          {
              WriteArrayString(vertexStream, registerInfo.varyingRowIndex);
          }
  
          vertexStream << ";\n";
      }
  
      // Instanced PointSprite emulation requires additional entries to calculate
      // the final output vertex positions of the quad that represents each sprite.
      if (useInstancedPointSpriteEmulation)
      {
          vertexStream << "\n"
                       << "    gl_PointSize = clamp(gl_PointSize, minPointSize, maxPointSize);\n";
  
          vertexStream << "    output.dx_Position.x += (input.spriteVertexPos.x * gl_PointSize / "
                          "(dx_ViewCoords.x*2)) * output.dx_Position.w;";
  
          if (programMetadata.usesViewScale())
          {
              // Multiply by ViewScale to invert the rendering when appropriate
              vertexStream << "    output.dx_Position.y += (-dx_ViewScale.y * "
                              "input.spriteVertexPos.y * gl_PointSize / (dx_ViewCoords.y*2)) * "
                              "output.dx_Position.w;";
          }
          else
          {
              vertexStream << "    output.dx_Position.y += (input.spriteVertexPos.y * gl_PointSize / "
                              "(dx_ViewCoords.y*2)) * output.dx_Position.w;";
          }
  
          vertexStream
              << "    output.dx_Position.z += input.spriteVertexPos.z * output.dx_Position.w;\n";
  
          if (programMetadata.usesPointCoord())
          {
              vertexStream << "\n"
                           << "    output.gl_PointCoord = input.spriteTexCoord;\n";
          }
      }
  
      // Renderers that enable instanced pointsprite emulation require the vertex shader output member
      // gl_PointCoord to be set to a default value if used without gl_PointSize. 0.5,0.5 is the same
      // default value used in the generated pixel shader.
      if (programMetadata.usesInsertedPointCoordValue())
      {
          ASSERT(!useInstancedPointSpriteEmulation);
          vertexStream << "\n"
                       << "    output.gl_PointCoord = float2(0.5, 0.5);\n";
      }
  
      vertexStream << "\n"
                   << "    return output;\n"
                   << "}\n";
  
      const auto &pixelBuiltins = builtinsD3D[SHADER_PIXEL];
  
      std::ostringstream pixelStream;
      pixelStream << fragmentShaderGL->getTranslatedSource(context);
      pixelStream << "struct PS_INPUT\n";
      generateVaryingLinkHLSL(varyingPacking, pixelBuiltins, builtinsD3D.usesPointSize(),
                              pixelStream);
      pixelStream << "\n";
  
      pixelStream << std::string(PIXEL_OUTPUT_STUB_STRING) << "\n";
  
      if (fragmentShader->usesFrontFacing())
      {
          if (shaderModel >= 4)
          {
              pixelStream << "PS_OUTPUT main(PS_INPUT input, bool isFrontFace : SV_IsFrontFace)\n"
                          << "{\n";
          }
          else
          {
              pixelStream << "PS_OUTPUT main(PS_INPUT input, float vFace : VFACE)\n"
                          << "{\n";
          }
      }
      else
      {
          pixelStream << "PS_OUTPUT main(PS_INPUT input)\n"
                      << "{\n";
      }
  
      if (pixelBuiltins.glViewIDOVR.enabled)
      {
          pixelStream << "    _ViewID_OVR = input.gl_ViewID_OVR;\n";
      }
  
      if (pixelBuiltins.glFragCoord.enabled)
      {
          pixelStream << "    float rhw = 1.0 / input.gl_FragCoord.w;\n";
  
          // Certain Shader Models (4_0+ and 3_0) allow reading from dx_Position in the pixel shader.
          // Other Shader Models (4_0_level_9_3 and 2_x) don't support this, so we emulate it using
          // dx_ViewCoords.
          if (shaderModel >= 4 && mRenderer->getShaderModelSuffix() == "")
          {
              pixelStream << "    gl_FragCoord.x = input.dx_Position.x;\n"
                          << "    gl_FragCoord.y = input.dx_Position.y;\n";
          }
          else if (shaderModel == 3)
          {
              pixelStream << "    gl_FragCoord.x = input.dx_Position.x + 0.5;\n"
                          << "    gl_FragCoord.y = input.dx_Position.y + 0.5;\n";
          }
          else
          {
              // dx_ViewCoords contains the viewport width/2, height/2, center.x and center.y. See
              // Renderer::setViewport()
              pixelStream << "    gl_FragCoord.x = (input.gl_FragCoord.x * rhw) * dx_ViewCoords.x + "
                             "dx_ViewCoords.z;\n"
                          << "    gl_FragCoord.y = (input.gl_FragCoord.y * rhw) * dx_ViewCoords.y + "
                             "dx_ViewCoords.w;\n";
          }
  
          if (programMetadata.usesViewScale())
          {
              // For Feature Level 9_3 and below, we need to correct gl_FragCoord.y to account
              // for dx_ViewScale. On Feature Level 10_0+, gl_FragCoord.y is calculated above using
              // dx_ViewCoords and is always correct irrespective of dx_ViewScale's value.
              // NOTE: usesViewScale() can only be true on D3D11 (i.e. Shader Model 4.0+).
              if (shaderModel >= 4 && mRenderer->getShaderModelSuffix() == "")
              {
                  // Some assumptions:
                  //  - dx_ViewScale.y = -1.0f when rendering to texture
                  //  - dx_ViewScale.y = +1.0f when rendering to the default framebuffer
                  //  - gl_FragCoord.y has been set correctly above.
                  //
                  // When rendering to the backbuffer, the code inverts gl_FragCoord's y coordinate.
                  // This involves subtracting the y coordinate from the height of the area being
                  // rendered to.
                  //
                  // First we calculate the height of the area being rendered to:
                  //    render_area_height = (2.0f / (1.0f - input.gl_FragCoord.y * rhw)) *
                  //    gl_FragCoord.y
                  //
                  // Note that when we're rendering to default FB, we want our output to be
                  // equivalent to:
                  //    "gl_FragCoord.y = render_area_height - gl_FragCoord.y"
                  //
                  // When we're rendering to a texture, we want our output to be equivalent to:
                  //    "gl_FragCoord.y = gl_FragCoord.y;"
                  //
                  // If we set scale_factor = ((1.0f + dx_ViewScale.y) / 2.0f), then notice that
                  //  - When rendering to default FB: scale_factor = 1.0f
                  //  - When rendering to texture:    scale_factor = 0.0f
                  //
                  // Therefore, we can get our desired output by setting:
                  //    "gl_FragCoord.y = scale_factor * render_area_height - dx_ViewScale.y *
                  //    gl_FragCoord.y"
                  //
                  // Simplifying, this becomes:
                  pixelStream
                      << "    gl_FragCoord.y = (1.0f + dx_ViewScale.y) * gl_FragCoord.y /"
                         "(1.0f - input.gl_FragCoord.y * rhw)  - dx_ViewScale.y * gl_FragCoord.y;\n";
              }
          }
  
          pixelStream << "    gl_FragCoord.z = (input.gl_FragCoord.z * rhw) * dx_DepthFront.x + "
                         "dx_DepthFront.y;\n"
                      << "    gl_FragCoord.w = rhw;\n";
      }
  
      if (pixelBuiltins.glPointCoord.enabled && shaderModel >= 3)
      {
          pixelStream << "    gl_PointCoord.x = input.gl_PointCoord.x;\n"
                      << "    gl_PointCoord.y = 1.0 - input.gl_PointCoord.y;\n";
      }
  
      if (fragmentShader->usesFrontFacing())
      {
          if (shaderModel <= 3)
          {
              pixelStream << "    gl_FrontFacing = (vFace * dx_DepthFront.z >= 0.0);\n";
          }
          else
          {
              pixelStream << "    gl_FrontFacing = isFrontFace;\n";
          }
      }
  
      for (const PackedVaryingRegister &registerInfo : varyingPacking.getRegisterList())
      {
          const auto &packedVarying = *registerInfo.packedVarying;
          const auto &varying = *packedVarying.varying;
          ASSERT(!varying.isBuiltIn() && !varying.isStruct());
  
          // Don't reference VS-only transform feedback varyings in the PS. Note that we're relying on
          // that the staticUse flag is set according to usage in the fragment shader.
          if (packedVarying.vertexOnly || !varying.staticUse)
              continue;
  
          pixelStream << "    ";
  
          if (packedVarying.isStructField())
          {
              pixelStream << DecorateVariable(packedVarying.parentStructName) << ".";
          }
  
          pixelStream << DecorateVariable(varying.name);
  
          if (varying.isArray())
          {
              WriteArrayString(pixelStream, registerInfo.varyingArrayIndex);
          }
  
          GLenum transposedType = TransposeMatrixType(varying.type);
          if (VariableRowCount(transposedType) > 1)
          {
              WriteArrayString(pixelStream, registerInfo.varyingRowIndex);
          }
  
          pixelStream << " = input.v" << registerInfo.semanticIndex;
  
          switch (VariableColumnCount(transposedType))
          {
              case 1:
                  pixelStream << ".x";
                  break;
              case 2:
                  pixelStream << ".xy";
                  break;
              case 3:
                  pixelStream << ".xyz";
                  break;
              case 4:
                  break;
              default:
                  UNREACHABLE();
          }
          pixelStream << ";\n";
      }
  
      pixelStream << "\n"
                  << "    gl_main();\n"
                  << "\n"
                  << "    return generateOutput();\n"
                  << "}\n";
  
      *vertexHLSL = vertexStream.str();
      *pixelHLSL  = pixelStream.str();
  }
  
  std::string DynamicHLSL::generateComputeShaderLinkHLSL(const gl::Context *context,
                                                         const gl::ProgramState &programData) const
  {
      gl::Shader *computeShaderGL = programData.getAttachedComputeShader();
      std::stringstream computeStream;
      std::string translatedSource = computeShaderGL->getTranslatedSource(context);
      computeStream << translatedSource;
  
      bool usesWorkGroupID = translatedSource.find("GL_USES_WORK_GROUP_ID") != std::string::npos;
      bool usesLocalInvocationID =
          translatedSource.find("GL_USES_LOCAL_INVOCATION_ID") != std::string::npos;
      bool usesGlobalInvocationID =
          translatedSource.find("GL_USES_GLOBAL_INVOCATION_ID") != std::string::npos;
      bool usesLocalInvocationIndex =
          translatedSource.find("GL_USES_LOCAL_INVOCATION_INDEX") != std::string::npos;
  
      computeStream << "\nstruct CS_INPUT\n{\n";
      if (usesWorkGroupID)
      {
          computeStream << "    uint3 dx_WorkGroupID : "
                        << "SV_GroupID;\n";
      }
  
      if (usesLocalInvocationID)
      {
          computeStream << "    uint3 dx_LocalInvocationID : "
                        << "SV_GroupThreadID;\n";
      }
  
      if (usesGlobalInvocationID)
      {
          computeStream << "    uint3 dx_GlobalInvocationID : "
                        << "SV_DispatchThreadID;\n";
      }
  
      if (usesLocalInvocationIndex)
      {
          computeStream << "    uint dx_LocalInvocationIndex : "
                        << "SV_GroupIndex;\n";
      }
  
      computeStream << "};\n\n";
  
      const sh::WorkGroupSize &localSize = computeShaderGL->getWorkGroupSize(context);
      computeStream << "[numthreads(" << localSize[0] << ", " << localSize[1] << ", " << localSize[2]
                    << ")]\n";
  
      computeStream << "void main(CS_INPUT input)\n"
                    << "{\n";
  
      if (usesWorkGroupID)
      {
          computeStream << "    gl_WorkGroupID = input.dx_WorkGroupID;\n";
      }
      if (usesLocalInvocationID)
      {
          computeStream << "    gl_LocalInvocationID = input.dx_LocalInvocationID;\n";
      }
      if (usesGlobalInvocationID)
      {
          computeStream << "    gl_GlobalInvocationID = input.dx_GlobalInvocationID;\n";
      }
      if (usesLocalInvocationIndex)
      {
          computeStream << "    gl_LocalInvocationIndex = input.dx_LocalInvocationIndex;\n";
      }
  
      computeStream << "\n"
                    << "    gl_main();\n"
                    << "}\n";
  
      return computeStream.str();
  }
  
  std::string DynamicHLSL::generateGeometryShaderPreamble(const VaryingPacking &varyingPacking,
                                                          const BuiltinVaryingsD3D &builtinsD3D,
                                                          const bool hasANGLEMultiviewEnabled) const
  {
      ASSERT(mRenderer->getMajorShaderModel() >= 4);
  
      std::ostringstream preambleStream;
  
      const auto &vertexBuiltins = builtinsD3D[SHADER_VERTEX];
  
      preambleStream << "struct GS_INPUT\n";
      generateVaryingLinkHLSL(varyingPacking, vertexBuiltins, builtinsD3D.usesPointSize(),
                              preambleStream);
      preambleStream << "\n"
                     << "struct GS_OUTPUT\n";
      generateVaryingLinkHLSL(varyingPacking, builtinsD3D[SHADER_GEOMETRY],
                              builtinsD3D.usesPointSize(), preambleStream);
      preambleStream
          << "\n"
          << "void copyVertex(inout GS_OUTPUT output, GS_INPUT input, GS_INPUT flatinput)\n"
          << "{\n"
          << "    output.gl_Position = input.gl_Position;\n";
  
      if (vertexBuiltins.glPointSize.enabled)
      {
          preambleStream << "    output.gl_PointSize = input.gl_PointSize;\n";
      }
  
      for (const PackedVaryingRegister &varyingRegister : varyingPacking.getRegisterList())
      {
          preambleStream << "    output.v" << varyingRegister.semanticIndex << " = ";
          if (varyingRegister.packedVarying->interpolation == sh::INTERPOLATION_FLAT)
          {
              preambleStream << "flat";
          }
          preambleStream << "input.v" << varyingRegister.semanticIndex << "; \n";
      }
  
      if (vertexBuiltins.glFragCoord.enabled)
      {
          preambleStream << "    output.gl_FragCoord = input.gl_FragCoord;\n";
      }
  
      // Only write the dx_Position if we aren't using point sprites
      preambleStream << "#ifndef ANGLE_POINT_SPRITE_SHADER\n"
                     << "    output.dx_Position = input.dx_Position;\n"
                     << "#endif  // ANGLE_POINT_SPRITE_SHADER\n"
                     << "}\n";
  
      if (builtinsD3D[SHADER_GEOMETRY].glViewportIndex.enabled && hasANGLEMultiviewEnabled)
      {
          preambleStream << "\n"
                         << "void selectView(inout GS_OUTPUT output, GS_INPUT input)\n"
                         << "{\n"
                         << "    output.gl_ViewportIndex = input.gl_ViewID_OVR;\n"
                         << "}\n";
      }
  
      return preambleStream.str();
  }
  
  std::string DynamicHLSL::generateGeometryShaderHLSL(gl::PrimitiveType primitiveType,
                                                      const gl::ContextState &data,
                                                      const gl::ProgramState &programData,
                                                      const bool useViewScale,
                                                      const bool hasANGLEMultiviewEnabled,
                                                      const bool pointSpriteEmulation,
                                                      const std::string &preambleString) const
  {
      ASSERT(mRenderer->getMajorShaderModel() >= 4);
  
      std::stringstream shaderStream;
  
      const bool pointSprites   = (primitiveType == PRIMITIVE_POINTS) && pointSpriteEmulation;
      const bool usesPointCoord = preambleString.find("gl_PointCoord") != std::string::npos;
  
      const char *inputPT  = nullptr;
      const char *outputPT = nullptr;
      int inputSize        = 0;
      int maxVertexOutput  = 0;
  
      switch (primitiveType)
      {
          case PRIMITIVE_POINTS:
              inputPT         = "point";
              inputSize       = 1;
  
              if (pointSprites)
              {
                  outputPT        = "Triangle";
                  maxVertexOutput = 4;
              }
              else
              {
                  outputPT        = "Point";
                  maxVertexOutput = 1;
              }
  
              break;
  
          case PRIMITIVE_LINES:
          case PRIMITIVE_LINE_STRIP:
          case PRIMITIVE_LINE_LOOP:
              inputPT         = "line";
              outputPT        = "Line";
              inputSize       = 2;
              maxVertexOutput = 2;
              break;
  
          case PRIMITIVE_TRIANGLES:
          case PRIMITIVE_TRIANGLE_STRIP:
          case PRIMITIVE_TRIANGLE_FAN:
              inputPT         = "triangle";
              outputPT        = "Triangle";
              inputSize       = 3;
              maxVertexOutput = 3;
              break;
  
          default:
              UNREACHABLE();
              break;
      }
  
      if (pointSprites)
      {
          shaderStream << "#define ANGLE_POINT_SPRITE_SHADER\n"
                          "\n"
                          "uniform float4 dx_ViewCoords : register(c1);\n";
  
          if (useViewScale)
          {
              shaderStream << "uniform float2 dx_ViewScale : register(c3);\n";
          }
  
          shaderStream << "\n"
                          "static float2 pointSpriteCorners[] = \n"
                          "{\n"
                          "    float2( 0.5f, -0.5f),\n"
                          "    float2( 0.5f,  0.5f),\n"
                          "    float2(-0.5f, -0.5f),\n"
                          "    float2(-0.5f,  0.5f)\n"
                          "};\n"
                          "\n"
                          "static float2 pointSpriteTexcoords[] = \n"
                          "{\n"
                          "    float2(1.0f, 1.0f),\n"
                          "    float2(1.0f, 0.0f),\n"
                          "    float2(0.0f, 1.0f),\n"
                          "    float2(0.0f, 0.0f)\n"
                          "};\n"
                          "\n"
                          "static float minPointSize = "
                       << static_cast<int>(data.getCaps().minAliasedPointSize)
                       << ".0f;\n"
                          "static float maxPointSize = "
                       << static_cast<int>(data.getCaps().maxAliasedPointSize) << ".0f;\n"
                       << "\n";
      }
  
      shaderStream << preambleString << "\n"
                   << "[maxvertexcount(" << maxVertexOutput << ")]\n"
                   << "void main(" << inputPT << " GS_INPUT input[" << inputSize << "], ";
  
      if (primitiveType == PRIMITIVE_TRIANGLE_STRIP)
      {
          shaderStream << "uint primitiveID : SV_PrimitiveID, ";
      }
  
      shaderStream << " inout " << outputPT << "Stream<GS_OUTPUT> outStream)\n"
                   << "{\n"
                   << "    GS_OUTPUT output = (GS_OUTPUT)0;\n";
  
      if (primitiveType == PRIMITIVE_TRIANGLE_STRIP)
      {
          shaderStream << "    uint lastVertexIndex = (primitiveID % 2 == 0 ? 2 : 1);\n";
      }
      else
      {
          shaderStream << "    uint lastVertexIndex = " << (inputSize - 1) << ";\n";
      }
  
      for (int vertexIndex = 0; vertexIndex < inputSize; ++vertexIndex)
      {
          shaderStream << "    copyVertex(output, input[" << vertexIndex
                       << "], input[lastVertexIndex]);\n";
          if (hasANGLEMultiviewEnabled)
          {
              shaderStream << "   selectView(output, input[" << vertexIndex << "]);\n";
          }
          if (!pointSprites)
          {
              ASSERT(inputSize == maxVertexOutput);
              shaderStream << "    outStream.Append(output);\n";
          }
      }
  
      if (pointSprites)
      {
          shaderStream << "\n"
                          "    float4 dx_Position = input[0].dx_Position;\n"
                          "    float gl_PointSize = clamp(input[0].gl_PointSize, minPointSize, "
                          "maxPointSize);\n"
                          "    float2 viewportScale = float2(1.0f / dx_ViewCoords.x, 1.0f / "
                          "dx_ViewCoords.y) * dx_Position.w;\n";
  
          for (int corner = 0; corner < 4; corner++)
          {
              if (useViewScale)
              {
                  shaderStream << "    \n"
                                  "    output.dx_Position = dx_Position + float4(1.0f, "
                                  "-dx_ViewScale.y, 1.0f, 1.0f)"
                                  "        * float4(pointSpriteCorners["
                               << corner << "] * viewportScale * gl_PointSize, 0.0f, 0.0f);\n";
              }
              else
              {
                  shaderStream << "\n"
                                  "    output.dx_Position = dx_Position + float4(pointSpriteCorners["
                               << corner << "] * viewportScale * gl_PointSize, 0.0f, 0.0f);\n";
              }
  
              if (usesPointCoord)
              {
                  shaderStream << "    output.gl_PointCoord = pointSpriteTexcoords[" << corner
                               << "];\n";
              }
  
              shaderStream << "    outStream.Append(output);\n";
          }
      }
  
      shaderStream << "    \n"
                      "    outStream.RestartStrip();\n"
                      "}\n";
  
      return shaderStream.str();
  }
  
  // static
  void DynamicHLSL::GenerateAttributeConversionHLSL(gl::VertexFormatType vertexFormatType,
                                                    const sh::ShaderVariable &shaderAttrib,
                                                    std::ostringstream &outStream)
  {
      // Matrix
      if (IsMatrixType(shaderAttrib.type))
      {
          outStream << "transpose(input." << DecorateVariable(shaderAttrib.name) << ")";
          return;
      }
  
      GLenum shaderComponentType = VariableComponentType(shaderAttrib.type);
      int shaderComponentCount   = VariableComponentCount(shaderAttrib.type);
      const gl::VertexFormat &vertexFormat = gl::GetVertexFormatFromType(vertexFormatType);
  
      // Perform integer to float conversion (if necessary)
      if (shaderComponentType == GL_FLOAT && vertexFormat.type != GL_FLOAT)
      {
          // TODO: normalization for 32-bit integer formats
          ASSERT(!vertexFormat.normalized && !vertexFormat.pureInteger);
          outStream << "float" << shaderComponentCount << "(input."
                    << DecorateVariable(shaderAttrib.name) << ")";
          return;
      }
  
      // No conversion necessary
      outStream << "input." << DecorateVariable(shaderAttrib.name);
  }
  
  void DynamicHLSL::getPixelShaderOutputKey(const gl::ContextState &data,
                                            const gl::ProgramState &programData,
                                            const ProgramD3DMetadata &metadata,
                                            std::vector<PixelShaderOutputVariable> *outPixelShaderKey)
  {
      // Two cases when writing to gl_FragColor and using ESSL 1.0:
      // - with a 3.0 context, the output color is copied to channel 0
      // - with a 2.0 context, the output color is broadcast to all channels
      bool broadcast = metadata.usesBroadcast(data);
      const unsigned int numRenderTargets =
          (broadcast || metadata.usesMultipleFragmentOuts() ? data.getCaps().maxDrawBuffers : 1);
  
      if (metadata.getMajorShaderVersion() < 300)
      {
          for (unsigned int renderTargetIndex = 0; renderTargetIndex < numRenderTargets;
               renderTargetIndex++)
          {
              PixelShaderOutputVariable outputKeyVariable;
              outputKeyVariable.type = GL_FLOAT_VEC4;
              outputKeyVariable.name = "gl_Color" + Str(renderTargetIndex);
              outputKeyVariable.source =
                  broadcast ? "gl_Color[0]" : "gl_Color[" + Str(renderTargetIndex) + "]";
              outputKeyVariable.outputIndex = renderTargetIndex;
  
              outPixelShaderKey->push_back(outputKeyVariable);
          }
      }
      else
      {
          const auto &shaderOutputVars =
              metadata.getFragmentShader()->getData().getActiveOutputVariables();
  
          for (auto outputPair : programData.getOutputLocations())
          {
              const VariableLocation &outputLocation   = outputPair.second;
              const sh::ShaderVariable &outputVariable = shaderOutputVars[outputLocation.index];
              const std::string &variableName = "out_" + outputLocation.name;
              const std::string &elementString =
                  (outputLocation.element == GL_INVALID_INDEX ? "" : Str(outputLocation.element));
  
              ASSERT(outputVariable.staticUse);
  
              PixelShaderOutputVariable outputKeyVariable;
              outputKeyVariable.type        = outputVariable.type;
              outputKeyVariable.name        = variableName + elementString;
              outputKeyVariable.source      = variableName + ArrayString(outputLocation.element);
              outputKeyVariable.outputIndex = outputPair.first;
  
              outPixelShaderKey->push_back(outputKeyVariable);
          }
      }
  }
  
  // BuiltinVarying Implementation.
  BuiltinVarying::BuiltinVarying() : enabled(false), index(0), systemValue(false)
  {
  }
  
  std::string BuiltinVarying::str() const
  {
      return (systemValue ? semantic : (semantic + Str(index)));
  }
  
  void BuiltinVarying::enableSystem(const std::string &systemValueSemantic)
  {
      enabled     = true;
      semantic    = systemValueSemantic;
      systemValue = true;
  }
  
  void BuiltinVarying::enable(const std::string &semanticVal, unsigned int indexVal)
  {
      enabled  = true;
      semantic = semanticVal;
      index    = indexVal;
  }
  
  // BuiltinVaryingsD3D Implementation.
  BuiltinVaryingsD3D::BuiltinVaryingsD3D(const ProgramD3DMetadata &metadata,
                                         const VaryingPacking &packing)
  {
      updateBuiltins(SHADER_VERTEX, metadata, packing);
      updateBuiltins(SHADER_PIXEL, metadata, packing);
      if (metadata.getRendererMajorShaderModel() >= 4)
      {
          updateBuiltins(SHADER_GEOMETRY, metadata, packing);
      }
  }
  
  void BuiltinVaryingsD3D::updateBuiltins(ShaderType shaderType,
                                          const ProgramD3DMetadata &metadata,
                                          const VaryingPacking &packing)
  {
      const std::string &userSemantic = GetVaryingSemantic(metadata.getRendererMajorShaderModel(),
                                                           metadata.usesSystemValuePointSize());
  
      unsigned int reservedSemanticIndex = packing.getMaxSemanticIndex();
  
      BuiltinInfo *builtins = &mBuiltinInfo[shaderType];
  
      if (metadata.getRendererMajorShaderModel() >= 4)
      {
          builtins->dxPosition.enableSystem("SV_Position");
      }
      else if (shaderType == SHADER_PIXEL)
      {
          builtins->dxPosition.enableSystem("VPOS");
      }
      else
      {
          builtins->dxPosition.enableSystem("POSITION");
      }
  
      if (metadata.usesTransformFeedbackGLPosition())
      {
          builtins->glPosition.enable(userSemantic, reservedSemanticIndex++);
      }
  
      if (metadata.usesFragCoord())
      {
          builtins->glFragCoord.enable(userSemantic, reservedSemanticIndex++);
      }
  
      if (shaderType == SHADER_VERTEX ? metadata.addsPointCoordToVertexShader()
                                      : metadata.usesPointCoord())
      {
          // SM3 reserves the TEXCOORD semantic for point sprite texcoords (gl_PointCoord)
          // In D3D11 we manually compute gl_PointCoord in the GS.
          if (metadata.getRendererMajorShaderModel() >= 4)
          {
              builtins->glPointCoord.enable(userSemantic, reservedSemanticIndex++);
          }
          else
          {
              builtins->glPointCoord.enable("TEXCOORD", 0);
          }
      }
  
      if (shaderType == SHADER_VERTEX && metadata.hasANGLEMultiviewEnabled())
      {
          builtins->glViewIDOVR.enable(userSemantic, reservedSemanticIndex++);
      }
  
      if (shaderType == SHADER_PIXEL && metadata.usesViewID())
      {
          builtins->glViewIDOVR.enableSystem("SV_ViewportArrayIndex");
      }
  
      if (shaderType == SHADER_GEOMETRY && metadata.hasANGLEMultiviewEnabled())
      {
          builtins->glViewportIndex.enableSystem("SV_ViewportArrayIndex");
      }
  
      // Special case: do not include PSIZE semantic in HLSL 3 pixel shaders
      if (metadata.usesSystemValuePointSize() &&
          (shaderType != SHADER_PIXEL || metadata.getRendererMajorShaderModel() >= 4))
      {
          builtins->glPointSize.enableSystem("PSIZE");
      }
  }
  
  }  // namespace rx