kc3-lang/angle/src/compiler/translator/tree_ops/vulkan/FlagSamplersWithTexelFetch.cpp

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• Hash : 8b869a95
  Author :
  Date : 2021-06-13T01:09:27
  

  Translator: Generate Ops for all built-in functions
  
  EOpCallBuiltInFunction is removed in this change, as well as the
  "op": "auto" property in builtin_function_declarations.txt.  Instead,
  gen_builtin_symbols.py automatically generates Ops for every built-in
  function and generates the TOperator enum accordingly.
  
  This simplifies SPIR-V code generation by allowing switches to be used
  on operators instead of string comparisons.
  
  Bug: angleproject:4589
  Bug: angleproject:4889
  Change-Id: Ia351524400b0e12a10a5572e27e9b88c6ec2e61c
  Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2958869
  Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org>
  Reviewed-by: Jonah Ryan-Davis <jonahr@google.com>
  Reviewed-by: Tim Van Patten <timvp@google.com>
  

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• src/compiler/translator/tree_ops/vulkan/FlagSamplersWithTexelFetch.cpp

• //
  // Copyright 2020 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.
  //
  // FlagSamplersForTexelFetch.cpp: finds all instances of texelFetch used with a static reference to
  // a sampler uniform, and flag that uniform as having been used with texelFetch
  //
  
  #include "compiler/translator/tree_ops/vulkan/FlagSamplersWithTexelFetch.h"
  
  #include "angle_gl.h"
  #include "common/utilities.h"
  
  #include "compiler/translator/SymbolTable.h"
  #include "compiler/translator/tree_util/IntermNode_util.h"
  #include "compiler/translator/tree_util/IntermTraverse.h"
  #include "compiler/translator/tree_util/ReplaceVariable.h"
  
  namespace sh
  {
  namespace
  {
  
  class FlagSamplersWithTexelFetchTraverser : public TIntermTraverser
  {
    public:
      FlagSamplersWithTexelFetchTraverser(TSymbolTable *symbolTable,
                                          std::vector<ShaderVariable> *uniforms)
          : TIntermTraverser(true, true, true, symbolTable), mUniforms(uniforms)
      {}
  
      bool visitAggregate(Visit visit, TIntermAggregate *node) override
      {
          // Decide if the node is a call to texelFetch[Offset]
          if (!BuiltInGroup::IsBuiltIn(node->getOp()))
          {
              return true;
          }
  
          ASSERT(node->getFunction()->symbolType() == SymbolType::BuiltIn);
          if (node->getFunction()->name() != "texelFetch" &&
              node->getFunction()->name() != "texelFetchOffset")
          {
              return true;
          }
  
          const TIntermSequence *sequence = node->getSequence();
  
          ASSERT(sequence->size() > 0);
  
          TIntermSymbol *samplerSymbol = sequence->at(0)->getAsSymbolNode();
          ASSERT(samplerSymbol != nullptr);
  
          const TVariable &samplerVariable = samplerSymbol->variable();
  
          for (ShaderVariable &uniform : *mUniforms)
          {
              if (samplerVariable.name() == uniform.name)
              {
                  ASSERT(gl::IsSamplerType(uniform.type));
                  uniform.texelFetchStaticUse = true;
                  break;
              }
          }
  
          return true;
      }
  
    private:
      std::vector<ShaderVariable> *mUniforms;
  };
  
  }  // anonymous namespace
  
  bool FlagSamplersForTexelFetch(TCompiler *compiler,
                                 TIntermBlock *root,
                                 TSymbolTable *symbolTable,
                                 std::vector<ShaderVariable> *uniforms)
  {
      ASSERT(uniforms != nullptr);
      if (uniforms->size() > 0)
      {
          FlagSamplersWithTexelFetchTraverser traverser(symbolTable, uniforms);
          root->traverse(&traverser);
      }
  
      return true;
  }
  
  }  // namespace sh
  

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