| /* |
| * 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) 2021-2022 Apple 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. |
| */ |
| |
| #pragma once |
| |
| #include "FilterEffect.h" |
| |
| namespace WebCore { |
| |
| class FEOffset : public FilterEffect { |
| public: |
| WEBCORE_EXPORT static Ref<FEOffset> create(float dx, float dy); |
| |
| float dx() const { return m_dx; } |
| bool setDx(float); |
| |
| float dy() const { return m_dy; } |
| bool setDy(float); |
| |
| static IntOutsets calculateOutsets(const FloatSize& offset); |
| |
| template<class Encoder> void encode(Encoder&) const; |
| template<class Decoder> static std::optional<Ref<FEOffset>> decode(Decoder&); |
| |
| private: |
| FEOffset(float dx, float dy); |
| |
| FloatRect calculateImageRect(const Filter&, const FilterImageVector& inputs, const FloatRect& primitiveSubregion) const override; |
| |
| bool resultIsAlphaImage(const FilterImageVector& inputs) const override; |
| |
| std::unique_ptr<FilterEffectApplier> createSoftwareApplier() const override; |
| |
| WTF::TextStream& externalRepresentation(WTF::TextStream&, FilterRepresentation) const override; |
| |
| float m_dx; |
| float m_dy; |
| }; |
| |
| template<class Encoder> |
| void FEOffset::encode(Encoder& encoder) const |
| { |
| encoder << m_dx; |
| encoder << m_dy; |
| } |
| |
| template<class Decoder> |
| std::optional<Ref<FEOffset>> FEOffset::decode(Decoder& decoder) |
| { |
| std::optional<float> dx; |
| decoder >> dx; |
| if (!dx) |
| return std::nullopt; |
| |
| std::optional<float> dy; |
| decoder >> dy; |
| if (!dy) |
| return std::nullopt; |
| |
| return FEOffset::create(*dx, *dy); |
| } |
| |
| } // namespace WebCore |
| |
| SPECIALIZE_TYPE_TRAITS_FILTER_EFFECT(FEOffset) |