text: /*
   * Copyright (C) 2004, 2005, 2006, 2007 Nikolas Zimmermann <zimmermann@kde.org>
   * Copyright (C) 2004, 2005 Rob Buis <buis@kde.org>
   * Copyright (C) 2005 Eric Seidel <eric@webkit.org>
   * Copyright (C) 2009 Dirk Schulze <krit@webkit.org>
   * Copyright (C) Research In Motion Limited 2010. All rights reserved.
   * Copyright (C) 2013 Google Inc. All rights reserved.
   *
   * This library is free software; you can redistribute it and/or
   * modify it under the terms of the GNU Library General Public
   * License as published by the Free Software Foundation; either
   * version 2 of the License, or (at your option) any later version.
   *
   * This library is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   * Library General Public License for more details.
   *
   * You should have received a copy of the GNU Library General Public License
   * along with this library; see the file COPYING.LIB.  If not, write to
   * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
   * Boston, MA 02110-1301, USA.
   */
  
  #include "third_party/blink/renderer/platform/graphics/filters/fe_offset.h"
  
  #include "third_party/blink/renderer/platform/graphics/filters/filter.h"
  #include "third_party/blink/renderer/platform/graphics/filters/paint_filter_builder.h"
  #include "third_party/blink/renderer/platform/wtf/text/text_stream.h"
  
  namespace blink {
  
  FEOffset::FEOffset(Filter* filter, float dx, float dy)
      : FilterEffect(filter), dx_(dx), dy_(dy) {}
  
  float FEOffset::Dx() const {
    return dx_;
  }
  
  void FEOffset::SetDx(float dx) {
    dx_ = dx;
  }
  
  float FEOffset::Dy() const {
    return dy_;
  }
  
  void FEOffset::SetDy(float dy) {
    dy_ = dy;
  }
  
  FloatRect FEOffset::MapEffect(const FloatRect& rect) const {
    FloatRect result = rect;
    result.Move(GetFilter()->ApplyHorizontalScale(dx_),
                GetFilter()->ApplyVerticalScale(dy_));
    return result;
  }
  
  sk_sp<PaintFilter> FEOffset::CreateImageFilter() {
    Filter* filter = GetFilter();
    absl::optional<PaintFilter::CropRect> crop_rect = GetCropRect();
    return sk_make_sp<OffsetPaintFilter>(
        SkFloatToScalar(filter->ApplyHorizontalScale(dx_)),
        SkFloatToScalar(filter->ApplyVerticalScale(dy_)),
        paint_filter_builder::Build(InputEffect(0),
                                    OperatingInterpolationSpace()),
        base::OptionalOrNullptr(crop_rect));
  }
  
  WTF::TextStream& FEOffset::ExternalRepresentation(WTF::TextStream& ts,
                                                    int indent) const {
    WriteIndent(ts, indent);
    ts << "[feOffset";
    FilterEffect::ExternalRepresentation(ts);
    ts << " dx=\"" << Dx() << "\" dy=\"" << Dy() << "\"]\n";
    InputEffect(0)->ExternalRepresentation(ts, indent + 1);
    return ts;
  }
  
  }  // namespace blink
  