| /* |
| * 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" |
| #include <wtf/text/WTFString.h> |
| |
| namespace WebCore { |
| |
| enum ChannelSelectorType { |
| CHANNEL_UNKNOWN = 0, |
| CHANNEL_R = 1, |
| CHANNEL_G = 2, |
| CHANNEL_B = 3, |
| CHANNEL_A = 4 |
| }; |
| |
| class FEDisplacementMap : public FilterEffect { |
| public: |
| WEBCORE_EXPORT static Ref<FEDisplacementMap> create(ChannelSelectorType xChannelSelector, ChannelSelectorType yChannelSelector, float scale); |
| |
| ChannelSelectorType xChannelSelector() const { return m_xChannelSelector; } |
| bool setXChannelSelector(const ChannelSelectorType); |
| |
| ChannelSelectorType yChannelSelector() const { return m_yChannelSelector; } |
| bool setYChannelSelector(const ChannelSelectorType); |
| |
| float scale() const { return m_scale; } |
| bool setScale(float); |
| |
| template<class Encoder> void encode(Encoder&) const; |
| template<class Decoder> static std::optional<Ref<FEDisplacementMap>> decode(Decoder&); |
| |
| private: |
| FEDisplacementMap(ChannelSelectorType xChannelSelector, ChannelSelectorType yChannelSelector, float); |
| |
| unsigned numberOfEffectInputs() const override { return 2; } |
| |
| FloatRect calculateImageRect(const Filter&, const FilterImageVector& inputs, const FloatRect& primitiveSubregion) const override; |
| |
| const DestinationColorSpace& resultColorSpace(const FilterImageVector&) const override; |
| void transformInputsColorSpace(const FilterImageVector& inputs) const override; |
| |
| std::unique_ptr<FilterEffectApplier> createSoftwareApplier() const override; |
| |
| WTF::TextStream& externalRepresentation(WTF::TextStream&, FilterRepresentation) const override; |
| |
| ChannelSelectorType m_xChannelSelector; |
| ChannelSelectorType m_yChannelSelector; |
| float m_scale; |
| }; |
| |
| template<class Encoder> |
| void FEDisplacementMap::encode(Encoder& encoder) const |
| { |
| encoder << m_xChannelSelector; |
| encoder << m_yChannelSelector; |
| encoder << m_scale; |
| } |
| |
| template<class Decoder> |
| std::optional<Ref<FEDisplacementMap>> FEDisplacementMap::decode(Decoder& decoder) |
| { |
| std::optional<ChannelSelectorType> xChannelSelector; |
| decoder >> xChannelSelector; |
| if (!xChannelSelector) |
| return std::nullopt; |
| |
| std::optional<ChannelSelectorType> yChannelSelector; |
| decoder >> yChannelSelector; |
| if (!yChannelSelector) |
| return std::nullopt; |
| |
| std::optional<float> scale; |
| decoder >> scale; |
| if (!scale) |
| return std::nullopt; |
| |
| return FEDisplacementMap::create(*xChannelSelector, *yChannelSelector, *scale); |
| } |
| |
| } // namespace WebCore |
| |
| namespace WTF { |
| |
| template<> struct EnumTraits<WebCore::ChannelSelectorType> { |
| using values = EnumValues< |
| WebCore::ChannelSelectorType, |
| |
| WebCore::CHANNEL_UNKNOWN, |
| WebCore::CHANNEL_R, |
| WebCore::CHANNEL_G, |
| WebCore::CHANNEL_B, |
| WebCore::CHANNEL_A |
| >; |
| }; |
| |
| } // namespace WTF |
| |
| SPECIALIZE_TYPE_TRAITS_FILTER_EFFECT(FEDisplacementMap) |