text: /*
   * Copyright 2019 Google, LLC
   *
   * Use of this source code is governed by a BSD-style license that can be
   * found in the LICENSE file.
   */
  
  #include "src/gpu/GrShaderCaps.h"
  #include "src/sksl/SkSLCompiler.h"
  #include "src/sksl/codegen/SkSLPipelineStageCodeGenerator.h"
  #include "src/sksl/ir/SkSLVarDeclarations.h"
  #include "src/sksl/ir/SkSLVariable.h"
  
  #include "fuzz/Fuzz.h"
  
  bool FuzzSKSL2Pipeline(sk_sp<SkData> bytes) {
      sk_sp<GrShaderCaps> caps = SkSL::ShaderCapsFactory::Default();
      SkSL::Compiler compiler(caps.get());
      SkSL::Program::Settings settings;
      std::unique_ptr<SkSL::Program> program = compiler.convertProgram(
                                                      SkSL::ProgramKind::kRuntimeShader,
                                                      SkSL::String((const char*) bytes->data(),
                                                                   bytes->size()),
                                                      settings);
      if (!program) {
          return false;
      }
  
      class Callbacks : public SkSL::PipelineStage::Callbacks {
          using String = SkSL::String;
  
          String declareUniform(const SkSL::VarDeclaration* decl) override {
              return String(decl->var().name());
          }
  
          void defineFunction(const char* /*decl*/, const char* /*body*/, bool /*isMain*/) override {}
          void declareFunction(const char* /*decl*/) override {}
          void defineStruct(const char* /*definition*/) override {}
          void declareGlobal(const char* /*declaration*/) override {}
  
          String sampleShader(int index, String coords) override {
              return "child_" + SkSL::to_string(index) + ".eval(" + coords + ")";
          }
  
          String sampleColorFilter(int index, String color) override {
              return "child_" + SkSL::to_string(index) + ".eval(" + color + ")";
          }
  
          String sampleBlender(int index, String src, String dst) override {
              return "child_" + SkSL::to_string(index) + ".eval(" + src + ", " + dst + ")";
          }
      };
  
      Callbacks callbacks;
      SkSL::PipelineStage::ConvertProgram(*program, "coords", "inColor", "half4(1)", &callbacks);
      return true;
  }
  
  #if defined(SK_BUILD_FOR_LIBFUZZER)
  extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
      if (size > 3000) {
          return 0;
      }
      auto bytes = SkData::MakeWithoutCopy(data, size);
      FuzzSKSL2Pipeline(bytes);
      return 0;
  }
  #endif
  