| /* |
| * 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 "platform/graphics/filters/FEDisplacementMap.h" |
| |
| #include "SkDisplacementMapEffect.h" |
| #include "platform/graphics/filters/Filter.h" |
| #include "platform/graphics/filters/PaintFilterBuilder.h" |
| #include "platform/text/TextStream.h" |
| |
| namespace blink { |
| |
| FEDisplacementMap::FEDisplacementMap(Filter* filter, |
| ChannelSelectorType x_channel_selector, |
| ChannelSelectorType y_channel_selector, |
| float scale) |
| : FilterEffect(filter), |
| x_channel_selector_(x_channel_selector), |
| y_channel_selector_(y_channel_selector), |
| scale_(scale) {} |
| |
| FEDisplacementMap* FEDisplacementMap::Create( |
| Filter* filter, |
| ChannelSelectorType x_channel_selector, |
| ChannelSelectorType y_channel_selector, |
| float scale) { |
| return new FEDisplacementMap(filter, x_channel_selector, y_channel_selector, |
| scale); |
| } |
| |
| FloatRect FEDisplacementMap::MapEffect(const FloatRect& rect) const { |
| FloatRect result = rect; |
| result.InflateX(GetFilter()->ApplyHorizontalScale(std::abs(scale_) / 2)); |
| result.InflateY(GetFilter()->ApplyVerticalScale(std::abs(scale_) / 2)); |
| return result; |
| } |
| |
| FloatRect FEDisplacementMap::MapInputs(const FloatRect& rect) const { |
| return InputEffect(0)->MapRect(rect); |
| } |
| |
| ChannelSelectorType FEDisplacementMap::XChannelSelector() const { |
| return x_channel_selector_; |
| } |
| |
| bool FEDisplacementMap::SetXChannelSelector( |
| const ChannelSelectorType x_channel_selector) { |
| if (x_channel_selector_ == x_channel_selector) |
| return false; |
| x_channel_selector_ = x_channel_selector; |
| return true; |
| } |
| |
| ChannelSelectorType FEDisplacementMap::YChannelSelector() const { |
| return y_channel_selector_; |
| } |
| |
| bool FEDisplacementMap::SetYChannelSelector( |
| const ChannelSelectorType y_channel_selector) { |
| if (y_channel_selector_ == y_channel_selector) |
| return false; |
| y_channel_selector_ = y_channel_selector; |
| return true; |
| } |
| |
| float FEDisplacementMap::Scale() const { |
| return scale_; |
| } |
| |
| bool FEDisplacementMap::SetScale(float scale) { |
| if (scale_ == scale) |
| return false; |
| scale_ = scale; |
| return true; |
| } |
| |
| static SkDisplacementMapEffect::ChannelSelectorType ToSkiaMode( |
| ChannelSelectorType type) { |
| switch (type) { |
| case CHANNEL_R: |
| return SkDisplacementMapEffect::kR_ChannelSelectorType; |
| case CHANNEL_G: |
| return SkDisplacementMapEffect::kG_ChannelSelectorType; |
| case CHANNEL_B: |
| return SkDisplacementMapEffect::kB_ChannelSelectorType; |
| case CHANNEL_A: |
| return SkDisplacementMapEffect::kA_ChannelSelectorType; |
| case CHANNEL_UNKNOWN: |
| default: |
| return SkDisplacementMapEffect::kUnknown_ChannelSelectorType; |
| } |
| } |
| |
| sk_sp<PaintFilter> FEDisplacementMap::CreateImageFilter() { |
| sk_sp<PaintFilter> color = |
| PaintFilterBuilder::Build(InputEffect(0), OperatingInterpolationSpace()); |
| // FEDisplacementMap must be a pass-through filter if |
| // the origin is tainted. See: |
| // https://drafts.fxtf.org/filter-effects/#fedisplacemnentmap-restrictions. |
| if (InputEffect(1)->OriginTainted()) |
| return color; |
| |
| sk_sp<PaintFilter> displ = |
| PaintFilterBuilder::Build(InputEffect(1), OperatingInterpolationSpace()); |
| SkDisplacementMapEffect::ChannelSelectorType type_x = |
| ToSkiaMode(x_channel_selector_); |
| SkDisplacementMapEffect::ChannelSelectorType type_y = |
| ToSkiaMode(y_channel_selector_); |
| PaintFilter::CropRect crop_rect = GetCropRect(); |
| // FIXME : Only applyHorizontalScale is used and applyVerticalScale is ignored |
| // This can be fixed by adding a 2nd scale parameter to |
| // DisplacementMapEffectPaintFilter. |
| return sk_make_sp<DisplacementMapEffectPaintFilter>( |
| type_x, type_y, |
| SkFloatToScalar(GetFilter()->ApplyHorizontalScale(scale_)), |
| std::move(displ), std::move(color), &crop_rect); |
| } |
| |
| 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, |
| int indent) const { |
| WriteIndent(ts, indent); |
| ts << "[feDisplacementMap"; |
| FilterEffect::ExternalRepresentation(ts); |
| ts << " scale=\"" << scale_ << "\" " |
| << "xChannelSelector=\"" << x_channel_selector_ << "\" " |
| << "yChannelSelector=\"" << y_channel_selector_ << "\"]\n"; |
| InputEffect(0)->ExternalRepresentation(ts, indent + 1); |
| InputEffect(1)->ExternalRepresentation(ts, indent + 1); |
| return ts; |
| } |
| |
| } // namespace blink |