text: /*
   * Copyright 2016 Google Inc.
   *
   * Use of this source code is governed by a BSD-style license that can be
   * found in the LICENSE file.
   */
  
  #ifndef SkColorFilter_Matrix_DEFINED
  #define SkColorFilter_Matrix_DEFINED
  
  #include "include/core/SkColorFilter.h"
  #include "include/core/SkFlattenable.h"
  
  class SkColorFilter_Matrix : public SkColorFilter {
  public:
      enum class Domain : uint8_t { kRGBA, kHSLA };
  
      explicit SkColorFilter_Matrix(const float array[20], Domain);
  
      uint32_t getFlags() const override;
  
  #if SK_SUPPORT_GPU
      std::unique_ptr<GrFragmentProcessor> asFragmentProcessor(GrRecordingContext*,
                                                               const GrColorInfo&) const override;
  #endif
  
      static void RegisterFlattenables();
  
  private:
      void flatten(SkWriteBuffer&) const override;
      bool onAsAColorMatrix(float matrix[20]) const override;
  
      SK_FLATTENABLE_HOOKS(SkColorFilter_Matrix)
  
      bool onAppendStages(const SkStageRec& rec, bool shaderIsOpaque) const override;
      bool onProgram(skvm::Builder*,
                     SkColorSpace* dstCS,
                     skvm::Uniforms* uniforms, SkArenaAlloc*,
                     skvm::F32* r, skvm::F32* g, skvm::F32* b, skvm::F32* a) const override;
  
      float       fMatrix[20];
      uint16_t    fFlags;
      Domain      fDomain;
  
      typedef SkColorFilter INHERITED;
  };
  
  #endif
  