kc3-lang/angle/src/libANGLE/Uniform.cpp

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• Hash : 01cfb98f
  Author :
  Date : 2025-08-14T14:17:28
  

  Add a new property to LinkedUniform struct
  
  The new property isTransformedFloat will be used by front end
  API to determine if we should transform 32-bit float to 16-bit float
  before writing to memory, and transform 16-bit float to 32-bit float
  after reading from memory. The property value will be passed from
  UsedUniform (child struct of ShaderVariable) object in
  UniformLinkder::getResults().
  
  This CL is no op.
  
  Bug: angleproject:405795981
  Change-Id: Ic4908712f5fa56cb657206a25d9d618b51ac6322
  Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/6851554
  Reviewed-by: Amirali Abdolrashidi <abdolrashidi@google.com>
  Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>
  Commit-Queue: Yuxin Hu <yuxinhu@google.com>
  

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• src/libANGLE/Uniform.cpp

• //
  // Copyright 2010 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 "libANGLE/Uniform.h"
  #include "common/BinaryStream.h"
  #include "libANGLE/ProgramLinkedResources.h"
  
  #include <cstring>
  
  namespace gl
  {
  
  LinkedUniform::LinkedUniform(GLenum typeIn,
                               GLenum precisionIn,
                               const std::vector<unsigned int> &arraySizesIn,
                               const int bindingIn,
                               const int offsetIn,
                               const int locationIn,
                               const int bufferIndexIn,
                               const sh::BlockMemberInfo &blockInfoIn)
  {
      // arrays are always flattened, which means at most 1D array
      ASSERT(arraySizesIn.size() <= 1);
  
      memset(this, 0, sizeof(*this));
      pod.typeIndex = GetUniformTypeIndex(typeIn);
      SetBitField(pod.precision, precisionIn);
      pod.location = locationIn;
      SetBitField(pod.binding, bindingIn);
      SetBitField(pod.offset, offsetIn);
      SetBitField(pod.bufferIndex, bufferIndexIn);
      pod.outerArraySizeProduct = 1;
      SetBitField(pod.arraySize, arraySizesIn.empty() ? 1u : arraySizesIn[0]);
      SetBitField(pod.flagBits.isArray, !arraySizesIn.empty());
      if (!(blockInfoIn == sh::kDefaultBlockMemberInfo))
      {
          pod.flagBits.isBlock               = 1;
          pod.flagBits.blockIsRowMajorMatrix = blockInfoIn.isRowMajorMatrix;
          SetBitField(pod.blockOffset, blockInfoIn.offset);
          SetBitField(pod.blockArrayStride, blockInfoIn.arrayStride);
          SetBitField(pod.blockMatrixStride, blockInfoIn.matrixStride);
      }
  }
  
  LinkedUniform::LinkedUniform(const UsedUniform &usedUniform)
  {
      ASSERT(!usedUniform.isArrayOfArrays());
      ASSERT(!usedUniform.isStruct());
      ASSERT(usedUniform.active);
      ASSERT(usedUniform.blockInfo == sh::kDefaultBlockMemberInfo);
  
      // Note: Ensure every data member is initialized.
      pod.flagBitsAsUByte = 0;
      pod.typeIndex       = GetUniformTypeIndex(usedUniform.type);
      SetBitField(pod.precision, usedUniform.precision);
      SetBitField(pod.imageUnitFormat, usedUniform.imageUnitFormat);
      pod.location          = usedUniform.location;
      pod.blockOffset       = 0;
      pod.blockArrayStride  = 0;
      pod.blockMatrixStride = 0;
      SetBitField(pod.binding, usedUniform.binding);
      SetBitField(pod.offset, usedUniform.offset);
  
      SetBitField(pod.bufferIndex, usedUniform.bufferIndex);
      SetBitField(pod.parentArrayIndex, usedUniform.parentArrayIndex());
      SetBitField(pod.outerArraySizeProduct, ArraySizeProduct(usedUniform.outerArraySizes));
      SetBitField(pod.outerArrayOffset, usedUniform.outerArrayOffset);
      SetBitField(pod.arraySize, usedUniform.isArray() ? usedUniform.getArraySizeProduct() : 1u);
      SetBitField(pod.flagBits.isArray, usedUniform.isArray());
  
      pod.id            = usedUniform.id;
      pod.activeUseBits = usedUniform.activeVariable.activeShaders();
      pod.ids           = usedUniform.activeVariable.getIds();
  
      SetBitField(pod.flagBits.isFragmentInOut, usedUniform.isFragmentInOut);
      SetBitField(pod.flagBits.texelFetchStaticUse, usedUniform.texelFetchStaticUse);
      SetBitField(pod.flagBits.isFloat16, usedUniform.isFloat16);
      ASSERT(!usedUniform.isArray() || pod.arraySize == usedUniform.getArraySizeProduct());
  }
  
  BufferVariable::BufferVariable()
  {
      memset(&pod, 0, sizeof(pod));
      pod.bufferIndex       = -1;
      pod.blockInfo         = sh::kDefaultBlockMemberInfo;
      pod.topLevelArraySize = -1;
  }
  
  BufferVariable::BufferVariable(GLenum type,
                                 GLenum precision,
                                 const std::string &name,
                                 const std::vector<unsigned int> &arraySizes,
                                 const int bufferIndex,
                                 int topLevelArraySize,
                                 const sh::BlockMemberInfo &blockInfo)
      : name(name)
  {
      memset(&pod, 0, sizeof(pod));
      SetBitField(pod.type, type);
      SetBitField(pod.precision, precision);
      SetBitField(pod.bufferIndex, bufferIndex);
      pod.blockInfo = blockInfo;
      SetBitField(pod.topLevelArraySize, topLevelArraySize);
      pod.isArray = !arraySizes.empty();
      SetBitField(pod.basicTypeElementCount, arraySizes.empty() ? 1u : arraySizes.back());
  }
  
  AtomicCounterBuffer::AtomicCounterBuffer()
  {
      memset(&pod, 0, sizeof(pod));
  }
  
  void AtomicCounterBuffer::unionReferencesWith(const LinkedUniform &other)
  {
      pod.activeUseBits |= other.pod.activeUseBits;
      for (const ShaderType shaderType : AllShaderTypes())
      {
          ASSERT(pod.ids[shaderType] == 0 || other.getId(shaderType) == 0 ||
                 pod.ids[shaderType] == other.getId(shaderType));
          if (pod.ids[shaderType] == 0)
          {
              pod.ids[shaderType] = other.getId(shaderType);
          }
      }
  }
  
  InterfaceBlock::InterfaceBlock()
  {
      memset(&pod, 0, sizeof(pod));
  }
  
  InterfaceBlock::InterfaceBlock(const std::string &name,
                                 const std::string &mappedName,
                                 bool isArray,
                                 bool isReadOnly,
                                 unsigned int arrayElementIn,
                                 unsigned int firstFieldArraySizeIn,
                                 int binding)
      : name(name), mappedName(mappedName)
  {
      memset(&pod, 0, sizeof(pod));
  
      SetBitField(pod.isArray, isArray);
      SetBitField(pod.isReadOnly, isReadOnly);
      SetBitField(pod.inShaderBinding, binding);
      pod.arrayElement        = arrayElementIn;
      pod.firstFieldArraySize = firstFieldArraySizeIn;
  }
  
  std::string InterfaceBlock::nameWithArrayIndex() const
  {
      std::stringstream fullNameStr;
      fullNameStr << name;
      if (pod.isArray)
      {
          fullNameStr << "[" << pod.arrayElement << "]";
      }
  
      return fullNameStr.str();
  }
  
  std::string InterfaceBlock::mappedNameWithArrayIndex() const
  {
      std::stringstream fullNameStr;
      fullNameStr << mappedName;
      if (pod.isArray)
      {
          fullNameStr << "[" << pod.arrayElement << "]";
      }
  
      return fullNameStr.str();
  }
  }  // namespace gl
  

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