| /* |
| * 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) 2021 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. |
| */ |
| |
| #include "config.h" |
| #include "FEDisplacementMap.h" |
| |
| #include "FEDisplacementMapSoftwareApplier.h" |
| #include "Filter.h" |
| #include <wtf/text/TextStream.h> |
| |
| namespace WebCore { |
| |
| Ref<FEDisplacementMap> FEDisplacementMap::create(ChannelSelectorType xChannelSelector, ChannelSelectorType yChannelSelector, float scale) |
| { |
| return adoptRef(*new FEDisplacementMap(xChannelSelector, yChannelSelector, scale)); |
| } |
| |
| FEDisplacementMap::FEDisplacementMap(ChannelSelectorType xChannelSelector, ChannelSelectorType yChannelSelector, float scale) |
| : FilterEffect(FilterEffect::Type::FEDisplacementMap) |
| , m_xChannelSelector(xChannelSelector) |
| , m_yChannelSelector(yChannelSelector) |
| , m_scale(scale) |
| { |
| } |
| |
| bool FEDisplacementMap::setXChannelSelector(const ChannelSelectorType xChannelSelector) |
| { |
| if (m_xChannelSelector == xChannelSelector) |
| return false; |
| m_xChannelSelector = xChannelSelector; |
| return true; |
| } |
| |
| bool FEDisplacementMap::setYChannelSelector(const ChannelSelectorType yChannelSelector) |
| { |
| if (m_yChannelSelector == yChannelSelector) |
| return false; |
| m_yChannelSelector = yChannelSelector; |
| return true; |
| } |
| |
| bool FEDisplacementMap::setScale(float scale) |
| { |
| if (m_scale == scale) |
| return false; |
| m_scale = scale; |
| return true; |
| } |
| |
| FloatRect FEDisplacementMap::calculateImageRect(const Filter& filter, const FilterImageVector&, const FloatRect& primitiveSubregion) const |
| { |
| return filter.maxEffectRect(primitiveSubregion); |
| } |
| |
| const DestinationColorSpace& FEDisplacementMap::resultColorSpace(const FilterImageVector& inputs) const |
| { |
| // Spec: The 'color-interpolation-filters' property only applies to the 'in2' source image |
| // and does not apply to the 'in' source image. The 'in' source image must remain in its |
| // current color space. |
| // The result is in that same color space because it is a displacement of the 'in' image. |
| return inputs[0]->colorSpace(); |
| } |
| |
| void FEDisplacementMap::transformInputsColorSpace(const FilterImageVector& inputs) const |
| { |
| // Do not transform the first primitive input, as per the spec. |
| ASSERT(inputs.size() == 2); |
| inputs[1]->transformToColorSpace(operatingColorSpace()); |
| } |
| |
| std::unique_ptr<FilterEffectApplier> FEDisplacementMap::createApplier(const Filter&) const |
| { |
| return FilterEffectApplier::create<FEDisplacementMapSoftwareApplier>(*this); |
| } |
| |
| static TextStream& operator<<(TextStream& ts, const ChannelSelectorType& type) |
| { |
| switch (type) { |
| case CHANNEL_UNKNOWN: |
| ts << "UNKNOWN"; |
| break; |
| case CHANNEL_R: |
| ts << "RED"; |
| break; |
| case CHANNEL_G: |
| ts << "GREEN"; |
| break; |
| case CHANNEL_B: |
| ts << "BLUE"; |
| break; |
| case CHANNEL_A: |
| ts << "ALPHA"; |
| break; |
| } |
| return ts; |
| } |
| |
| TextStream& FEDisplacementMap::externalRepresentation(TextStream& ts, FilterRepresentation representation) const |
| { |
| ts << indent << "[feDisplacementMap"; |
| FilterEffect::externalRepresentation(ts, representation); |
| |
| ts << " scale=\"" << m_scale << "\""; |
| ts << " xChannelSelector=\"" << m_xChannelSelector << "\""; |
| ts << " yChannelSelector=\"" << m_yChannelSelector << "\""; |
| |
| ts << "]\n"; |
| return ts; |
| } |
| |
| } // namespace WebCore |