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 {
      typedef SkImageFilter INHERITED;
  
  public:
      static SkOffsetImageFilter* Create(SkScalar dx, SkScalar dy, SkImageFilter* input = NULL,
                                         const CropRect* cropRect = NULL) {
          if (!SkScalarIsFinite(dx) || !SkScalarIsFinite(dy)) {
              return NULL;
          }
          return SkNEW_ARGS(SkOffsetImageFilter, (dx, dy, input, cropRect));
      }
      virtual void computeFastBounds(const SkRect& src, SkRect* dst) const SK_OVERRIDE;
      SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkOffsetImageFilter)
  
  protected:
      SkOffsetImageFilter(SkScalar dx, SkScalar dy, SkImageFilter* input, const CropRect* cropRect);
  #ifdef SK_SUPPORT_LEGACY_DEEPFLATTENING
      explicit SkOffsetImageFilter(SkReadBuffer& buffer);
  #endif
      virtual void flatten(SkWriteBuffer&) const SK_OVERRIDE;
  
      virtual bool onFilterImage(Proxy*, const SkBitmap& src, const Context&,
                                 SkBitmap* result, SkIPoint* loc) const SK_OVERRIDE;
      virtual bool onFilterBounds(const SkIRect&, const SkMatrix&, SkIRect*) const SK_OVERRIDE;
  
  private:
      SkVector fOffset;
  };
  
  #endif
  