kc3-lang/angle/src/compiler/HLSLLayoutEncoder.cpp

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• Author : Jamie Madill
  Date : 2013-06-20 11:55:55
  Hash : 440dc749
  Message : Redesign the code that uses block layouts to use a generic base class. The cleaner code also has the benefit of allowing us to separate the HLSL-specific parts out of the shader validator. TRAC #23083 Signed-off-by: Nicolas Capens Signed-off-by: Shannon Woods Authored-by: Jamie Madill

• src/compiler/HLSLLayoutEncoder.cpp

• //
  // Copyright (c) 2013 The ANGLE Project Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  //
  
  #include "compiler/HLSLLayoutEncoder.h"
  #include "compiler/Uniform.h"
  #include "common/mathutil.h"
  #include "common/utilities.h"
  
  namespace sh
  {
  
  HLSLBlockEncoder::HLSLBlockEncoder(std::vector<BlockMemberInfo> *blockInfoOut)
      : BlockLayoutEncoder(blockInfoOut)
  {
  }
  
  void HLSLBlockEncoder::enterAggregateType()
  {
      nextRegister();
  }
  
  void HLSLBlockEncoder::exitAggregateType()
  {
  }
  
  void HLSLBlockEncoder::getBlockLayoutInfo(const sh::Uniform &uniform, int *arrayStrideOut, int *matrixStrideOut)
  {
      ASSERT(uniform.fields.empty());
  
      // We assume we are only dealing with 4 byte components (no doubles or half-words currently)
      ASSERT(gl::UniformComponentSize(gl::UniformComponentType(uniform.type)) == ComponentSize);
  
      int matrixStride = 0;
      int arrayStride = 0;
  
      if (gl::IsMatrixType(uniform.type))
      {
          nextRegister();
          matrixStride = RegisterSize;
  
          if (uniform.arraySize > 0)
          {
              const int numRegisters = gl::MatrixRegisterCount(uniform.type, uniform.isRowMajorMatrix);
              arrayStride = RegisterSize * numRegisters;
          }
      }
      else if (uniform.arraySize > 0)
      {
          nextRegister();
          arrayStride = RegisterSize;
      }
      else
      {
          int numComponents = gl::UniformComponentCount(uniform.type);
          if ((numComponents + (mCurrentOffset % RegisterSize)) > RegisterSize)
          {
              nextRegister();
          }
      }
  
      *matrixStrideOut = matrixStride;
      *arrayStrideOut = arrayStride;
  }
  
  void HLSLBlockEncoder::advanceOffset(const sh::Uniform &uniform, int arrayStride, int matrixStride)
  {
      if (uniform.arraySize > 0)
      {
          mCurrentOffset += arrayStride * (uniform.arraySize - 1);
      }
  
      if (gl::IsMatrixType(uniform.type))
      {
          ASSERT(matrixStride == RegisterSize);
          const int numRegisters = gl::MatrixRegisterCount(uniform.type, uniform.isRowMajorMatrix);
          const int numComponents = gl::MatrixComponentCount(uniform.type, uniform.isRowMajorMatrix);
          mCurrentOffset += RegisterSize * (numRegisters - 1);
          mCurrentOffset += numComponents;
      }
      else
      {
          mCurrentOffset += gl::UniformComponentCount(uniform.type);
      }
  }
  
  }