kc3-lang/angle/src/compiler/translator/blocklayoutHLSL.cpp

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• Hash : 465835d6
  Author :
  Date : 2017-09-26T13:34:10
  

  Support arrays of arrays in the API
  
  The ShaderVariable class that is used as an interface between the
  compiler and the rest of the code gets arrays of arrays support.
  
  Array of array variables are passed from the compiler just like any
  other variables. However, when stored in Program state each innermost
  array constitutes a separate variable. This is done to make the
  implementation match the GLES specification for program interface
  query APIs.
  
  This will be tested more fully once support for parsing arrays of
  arrays lands in the compiler.
  
  TEST=angle_end2end_tests, angle_unittests
  BUG=angleproject:2125
  
  Change-Id: I0f7159000f039be92a87a52b3b68cd9a215a21cb
  Reviewed-on: https://chromium-review.googlesource.com/684742
  Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>
  Reviewed-by: Jamie Madill <jmadill@chromium.org>
  

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• src/compiler/translator/blocklayoutHLSL.cpp

• //
  // Copyright (c) 2013-2014 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.
  //
  // blocklayout.cpp:
  //   Implementation for block layout classes and methods.
  //
  
  #include "compiler/translator/blocklayoutHLSL.h"
  
  #include "common/mathutil.h"
  #include "common/utilities.h"
  
  namespace sh
  {
  
  HLSLBlockEncoder::HLSLBlockEncoder(HLSLBlockEncoderStrategy strategy, bool transposeMatrices)
      : mEncoderStrategy(strategy), mTransposeMatrices(transposeMatrices)
  {
  }
  
  void HLSLBlockEncoder::enterAggregateType()
  {
      nextRegister();
  }
  
  void HLSLBlockEncoder::exitAggregateType()
  {
  }
  
  void HLSLBlockEncoder::getBlockLayoutInfo(GLenum typeIn,
                                            const std::vector<unsigned int> &arraySizes,
                                            bool isRowMajorMatrix,
                                            int *arrayStrideOut,
                                            int *matrixStrideOut)
  {
      GLenum type = (mTransposeMatrices ? gl::TransposeMatrixType(typeIn) : typeIn);
  
      // We assume we are only dealing with 4 byte components (no doubles or half-words currently)
      ASSERT(gl::VariableComponentSize(gl::VariableComponentType(type)) == BytesPerComponent);
  
      int matrixStride = 0;
      int arrayStride  = 0;
  
      // if variables are not to be packed, or we're about to
      // pack a matrix or array, skip to the start of the next
      // register
      if (!isPacked() || gl::IsMatrixType(type) || !arraySizes.empty())
      {
          nextRegister();
      }
  
      if (gl::IsMatrixType(type))
      {
          matrixStride = ComponentsPerRegister;
  
          if (!arraySizes.empty())
          {
              const int numRegisters = gl::MatrixRegisterCount(type, isRowMajorMatrix);
              arrayStride            = ComponentsPerRegister * numRegisters;
          }
      }
      else if (!arraySizes.empty())
      {
          arrayStride = ComponentsPerRegister;
      }
      else if (isPacked())
      {
          int numComponents = gl::VariableComponentCount(type);
          if ((numComponents + (mCurrentOffset % ComponentsPerRegister)) > ComponentsPerRegister)
          {
              nextRegister();
          }
      }
  
      *matrixStrideOut = matrixStride;
      *arrayStrideOut  = arrayStride;
  }
  
  void HLSLBlockEncoder::advanceOffset(GLenum typeIn,
                                       const std::vector<unsigned int> &arraySizes,
                                       bool isRowMajorMatrix,
                                       int arrayStride,
                                       int matrixStride)
  {
      GLenum type = (mTransposeMatrices ? gl::TransposeMatrixType(typeIn) : typeIn);
  
      if (!arraySizes.empty())
      {
          mCurrentOffset += arrayStride * (gl::ArraySizeProduct(arraySizes) - 1);
      }
  
      if (gl::IsMatrixType(type))
      {
          ASSERT(matrixStride == ComponentsPerRegister);
          const int numRegisters  = gl::MatrixRegisterCount(type, isRowMajorMatrix);
          const int numComponents = gl::MatrixComponentCount(type, isRowMajorMatrix);
          mCurrentOffset += ComponentsPerRegister * (numRegisters - 1);
          mCurrentOffset += numComponents;
      }
      else if (isPacked())
      {
          mCurrentOffset += gl::VariableComponentCount(type);
      }
      else
      {
          mCurrentOffset += ComponentsPerRegister;
      }
  }
  
  void HLSLBlockEncoder::skipRegisters(unsigned int numRegisters)
  {
      mCurrentOffset += (numRegisters * ComponentsPerRegister);
  }
  
  HLSLBlockEncoder::HLSLBlockEncoderStrategy HLSLBlockEncoder::GetStrategyFor(
      ShShaderOutput outputType)
  {
      switch (outputType)
      {
          case SH_HLSL_3_0_OUTPUT:
              return ENCODE_LOOSE;
          case SH_HLSL_4_1_OUTPUT:
          case SH_HLSL_4_0_FL9_3_OUTPUT:
              return ENCODE_PACKED;
          default:
              UNREACHABLE();
              return ENCODE_PACKED;
      }
  }
  
  template <class ShaderVarType>
  void HLSLVariableRegisterCount(const ShaderVarType &variable, HLSLBlockEncoder *encoder)
  {
      if (variable.isStruct())
      {
          for (size_t arrayElement = 0; arrayElement < variable.getArraySizeProduct(); arrayElement++)
          {
              encoder->enterAggregateType();
  
              for (size_t fieldIndex = 0; fieldIndex < variable.fields.size(); fieldIndex++)
              {
                  HLSLVariableRegisterCount(variable.fields[fieldIndex], encoder);
              }
  
              encoder->exitAggregateType();
          }
      }
      else
      {
          // We operate only on varyings and uniforms, which do not have matrix layout qualifiers
          encoder->encodeType(variable.type, variable.arraySizes, false);
      }
  }
  
  unsigned int HLSLVariableRegisterCount(const Uniform &variable, ShShaderOutput outputType)
  {
      HLSLBlockEncoder encoder(HLSLBlockEncoder::GetStrategyFor(outputType), true);
      HLSLVariableRegisterCount(variable, &encoder);
  
      const size_t registerBytes = (encoder.BytesPerComponent * encoder.ComponentsPerRegister);
      return static_cast<unsigned int>(rx::roundUp<size_t>(encoder.getBlockSize(), registerBytes) /
                                       registerBytes);
  }
  }  // namespace sh
  

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