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 GrTextureAdjuster_DEFINED
  #define GrTextureAdjuster_DEFINED
  
  #include "src/core/SkTLazy.h"
  #include "src/gpu/GrTextureProducer.h"
  #include "src/gpu/GrTextureProxy.h"
  
  class GrRecordingContext;
  
  /**
   * Base class for sources that start out as textures. Optionally allows for a content area subrect.
   * The intent is not to use content area for subrect rendering. Rather, the pixels outside the
   * content area have undefined values and shouldn't be read *regardless* of filtering mode or
   * the SkCanvas::SrcRectConstraint used for subrect draws.
   */
  class GrTextureAdjuster : public GrTextureProducer {
  public:
      std::unique_ptr<GrFragmentProcessor> createFragmentProcessor(
              const SkMatrix& textureMatrix,
              const SkRect& constraintRect,
              FilterConstraint,
              bool coordsLimitedToConstraintRect,
              const GrSamplerState::Filter* filterOrNullForBicubic) override;
  
      GrTextureAdjuster(GrRecordingContext*, sk_sp<GrTextureProxy>, const GrColorInfo&,
                        uint32_t uniqueID, bool useDecal = false);
  
  protected:
      void makeCopyKey(const CopyParams& params, GrUniqueKey* copyKey) override;
      void didCacheCopy(const GrUniqueKey& copyKey, uint32_t contextUniqueID) override;
  
      GrTextureProxy* originalProxy() const { return fOriginal.get(); }
      sk_sp<GrTextureProxy> originalProxyRef() const { return fOriginal; }
  
  private:
      sk_sp<GrTextureProxy> onRefTextureProxyForParams(const GrSamplerState&,
                                                       bool willBeMipped,
                                                       SkScalar scaleAdjust[2]) override;
  
      sk_sp<GrTextureProxy> refTextureProxyCopy(const CopyParams& copyParams, bool willBeMipped);
  
      sk_sp<GrTextureProxy> fOriginal;
      uint32_t fUniqueID;
  
      typedef GrTextureProducer INHERITED;
  };
  
  #endif
  