text: /*
   * Copyright 2018 Google Inc.
   *
   * Use of this source code is governed by a BSD-style license that can be
   * found in the LICENSE file.
   */
  
  /**************************************************************************************************
   *** This file was autogenerated from GrConstColorProcessor.fp; do not modify.
   **************************************************************************************************/
  #include "GrConstColorProcessor.h"
  #include "glsl/GrGLSLFragmentProcessor.h"
  #include "glsl/GrGLSLFragmentShaderBuilder.h"
  #include "glsl/GrGLSLProgramBuilder.h"
  #include "GrTexture.h"
  #include "SkSLCPP.h"
  #include "SkSLUtil.h"
  class GrGLSLConstColorProcessor : public GrGLSLFragmentProcessor {
  public:
      GrGLSLConstColorProcessor() {}
      void emitCode(EmitArgs& args) override {
          GrGLSLFPFragmentBuilder* fragBuilder = args.fFragBuilder;
          const GrConstColorProcessor& _outer = args.fFp.cast<GrConstColorProcessor>();
          (void)_outer;
          auto color = _outer.color();
          (void)color;
          auto mode = _outer.mode();
          (void)mode;
          fColorVar = args.fUniformHandler->addUniform(kFragment_GrShaderFlag, kHalf4_GrSLType,
                                                       kDefault_GrSLPrecision, "color");
          fragBuilder->codeAppendf(
                  "@switch (%d) {\n    case 0:\n        %s = %s;\n        break;\n    case 1:\n      "
                  "  %s = %s * %s;\n        break;\n    case 2:\n        %s = %s.w * %s;\n        "
                  "break;\n}\n",
                  (int)_outer.mode(), args.fOutputColor,
                  args.fUniformHandler->getUniformCStr(fColorVar), args.fOutputColor,
                  args.fInputColor, args.fUniformHandler->getUniformCStr(fColorVar),
                  args.fOutputColor, args.fInputColor,
                  args.fUniformHandler->getUniformCStr(fColorVar));
      }
  
  private:
      void onSetData(const GrGLSLProgramDataManager& pdman,
                     const GrFragmentProcessor& _proc) override {
          const GrConstColorProcessor& _outer = _proc.cast<GrConstColorProcessor>();
          {
              const SkPMColor4f& colorValue = _outer.color();
              if (fColorPrev != colorValue) {
                  fColorPrev = colorValue;
                  pdman.set4fv(fColorVar, 1, colorValue.vec());
              }
          }
      }
      SkPMColor4f fColorPrev = {SK_FloatNaN, SK_FloatNaN, SK_FloatNaN, SK_FloatNaN};
      UniformHandle fColorVar;
  };
  GrGLSLFragmentProcessor* GrConstColorProcessor::onCreateGLSLInstance() const {
      return new GrGLSLConstColorProcessor();
  }
  void GrConstColorProcessor::onGetGLSLProcessorKey(const GrShaderCaps& caps,
                                                    GrProcessorKeyBuilder* b) const {
      b->add32((int32_t)fMode);
  }
  bool GrConstColorProcessor::onIsEqual(const GrFragmentProcessor& other) const {
      const GrConstColorProcessor& that = other.cast<GrConstColorProcessor>();
      (void)that;
      if (fColor != that.fColor) return false;
      if (fMode != that.fMode) return false;
      return true;
  }
  GrConstColorProcessor::GrConstColorProcessor(const GrConstColorProcessor& src)
          : INHERITED(kGrConstColorProcessor_ClassID, src.optimizationFlags())
          , fColor(src.fColor)
          , fMode(src.fMode) {}
  std::unique_ptr<GrFragmentProcessor> GrConstColorProcessor::clone() const {
      return std::unique_ptr<GrFragmentProcessor>(new GrConstColorProcessor(*this));
  }
  GR_DEFINE_FRAGMENT_PROCESSOR_TEST(GrConstColorProcessor);
  #if GR_TEST_UTILS
  std::unique_ptr<GrFragmentProcessor> GrConstColorProcessor::TestCreate(GrProcessorTestData* d) {
      SkPMColor4f color;
      int colorPicker = d->fRandom->nextULessThan(3);
      switch (colorPicker) {
          case 0: {
              uint32_t a = d->fRandom->nextULessThan(0x100);
              uint32_t r = d->fRandom->nextULessThan(a + 1);
              uint32_t g = d->fRandom->nextULessThan(a + 1);
              uint32_t b = d->fRandom->nextULessThan(a + 1);
              color = SkPMColor4f::FromBytes_RGBA(GrColorPackRGBA(r, g, b, a));
              break;
          }
          case 1:
              color = SK_PMColor4fTRANSPARENT;
              break;
          case 2:
              uint32_t c = d->fRandom->nextULessThan(0x100);
              color = SkPMColor4f::FromBytes_RGBA(c | (c << 8) | (c << 16) | (c << 24));
              break;
      }
      InputMode mode = static_cast<InputMode>(d->fRandom->nextULessThan(kInputModeCnt));
      return GrConstColorProcessor::Make(color, mode);
  }
  #endif
  