text: /*
   * Copyright 2012 The Android Open Source Project
   *
   * Use of this source code is governed by a BSD-style license that can be
   * found in the LICENSE file.
   */
  
  #ifndef SkOffsetImageFilter_DEFINED
  #define SkOffsetImageFilter_DEFINED
  
  #include "SkImageFilter.h"
  #include "SkPoint.h"
  
  class SK_API SkOffsetImageFilter : public SkImageFilter {
  public:
      static SkImageFilter* Create(SkScalar dx, SkScalar dy, SkImageFilter* input = NULL,
                                   const CropRect* cropRect = NULL) {
          if (!SkScalarIsFinite(dx) || !SkScalarIsFinite(dy)) {
              return NULL;
          }
          return new SkOffsetImageFilter(dx, dy, input, cropRect);
      }
  
      void computeFastBounds(const SkRect& src, SkRect* dst) const override;
  
      SK_TO_STRING_OVERRIDE()
      SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkOffsetImageFilter)
  
  protected:
      void flatten(SkWriteBuffer&) const override;
      bool onFilterImage(Proxy*, const SkBitmap& src, const Context&, SkBitmap* result,
                         SkIPoint* loc) const override;
      void onFilterNodeBounds(const SkIRect&, const SkMatrix&, SkIRect*, MapDirection) const override;
  
  private:
      SkOffsetImageFilter(SkScalar dx, SkScalar dy, SkImageFilter* input, const CropRect*);
  
      SkVector fOffset;
  
      typedef SkImageFilter INHERITED;
  };
  
  #endif
  