| // Copyright 2014 Google Inc. All Rights Reserved. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| #include "cobalt/render_tree/brush.h" |
| |
| #include "cobalt/render_tree/brush_visitor.h" |
| |
| namespace cobalt { |
| namespace render_tree { |
| |
| namespace { |
| |
| class BrushCloner : public BrushVisitor { |
| public: |
| virtual ~BrushCloner() {} |
| |
| void Visit(const SolidColorBrush* solid_color_brush) OVERRIDE { |
| cloned_.reset(new SolidColorBrush(*solid_color_brush)); |
| } |
| |
| void Visit(const LinearGradientBrush* linear_gradient_brush) OVERRIDE { |
| cloned_.reset(new LinearGradientBrush(*linear_gradient_brush)); |
| } |
| |
| void Visit(const RadialGradientBrush* radial_gradient_brush) OVERRIDE { |
| cloned_.reset(new RadialGradientBrush(*radial_gradient_brush)); |
| } |
| |
| scoped_ptr<Brush> PassClone() { return cloned_.Pass(); } |
| |
| private: |
| scoped_ptr<Brush> cloned_; |
| }; |
| |
| } // namespace |
| |
| void SolidColorBrush::Accept(BrushVisitor* visitor) const { |
| visitor->Visit(this); |
| } |
| |
| namespace { |
| void ValidateColorStops(const ColorStopList& color_stops) { |
| // Verify that the data is valid. In particular, there should be at least |
| // two color stops and they should be sorted by position. |
| DCHECK_LE(2U, color_stops.size()); |
| for (size_t i = 0; i < color_stops.size(); ++i) { |
| DCHECK_LE(0.0f, color_stops[i].position); |
| DCHECK_GE(1.0f, color_stops[i].position); |
| if (i > 0) { |
| DCHECK_GE(color_stops[i].position, color_stops[i - 1].position); |
| } |
| } |
| } |
| } // namespace |
| |
| LinearGradientBrush::Data::Data() {} |
| |
| LinearGradientBrush::Data::Data(const math::PointF& source, |
| const math::PointF& dest, |
| const ColorStopList& color_stops) |
| : source_(source), dest_(dest), color_stops_(color_stops) { |
| ValidateColorStops(color_stops_); |
| } |
| LinearGradientBrush::Data::Data(const math::PointF& source, |
| const math::PointF& dest) |
| : source_(source), dest_(dest) {} |
| |
| LinearGradientBrush::LinearGradientBrush(const math::PointF& source, |
| const math::PointF& dest, |
| const ColorStopList& color_stops) |
| : data_(source, dest, color_stops) {} |
| |
| LinearGradientBrush::LinearGradientBrush(const math::PointF& source, |
| const math::PointF& dest, |
| const ColorRGBA& source_color, |
| const ColorRGBA& dest_color) |
| : data_(source, dest) { |
| data_.color_stops_.reserve(2); |
| data_.color_stops_.push_back(ColorStop(0, source_color)); |
| data_.color_stops_.push_back(ColorStop(1, dest_color)); |
| } |
| |
| void LinearGradientBrush::Accept(BrushVisitor* visitor) const { |
| visitor->Visit(this); |
| } |
| |
| RadialGradientBrush::RadialGradientBrush(const math::PointF& center, |
| float radius, |
| const ColorStopList& color_stops) |
| : center_(center), |
| radius_x_(radius), |
| radius_y_(radius), |
| color_stops_(color_stops) { |
| ValidateColorStops(color_stops_); |
| } |
| |
| RadialGradientBrush::RadialGradientBrush(const math::PointF& center, |
| float radius_x, float radius_y, |
| const ColorStopList& color_stops) |
| : center_(center), |
| radius_x_(radius_x), |
| radius_y_(radius_y), |
| color_stops_(color_stops) { |
| ValidateColorStops(color_stops_); |
| } |
| |
| RadialGradientBrush::RadialGradientBrush(const math::PointF& center, |
| float radius, |
| const ColorRGBA& source_color, |
| const ColorRGBA& dest_color) |
| : center_(center), radius_x_(radius), radius_y_(radius) { |
| color_stops_.reserve(2); |
| color_stops_.push_back(ColorStop(0, source_color)); |
| color_stops_.push_back(ColorStop(1, dest_color)); |
| } |
| |
| RadialGradientBrush::RadialGradientBrush(const math::PointF& center, |
| float radius_x, float radius_y, |
| const ColorRGBA& source_color, |
| const ColorRGBA& dest_color) |
| : center_(center), radius_x_(radius_x), radius_y_(radius_y) { |
| color_stops_.reserve(2); |
| color_stops_.push_back(ColorStop(0, source_color)); |
| color_stops_.push_back(ColorStop(1, dest_color)); |
| } |
| |
| void RadialGradientBrush::Accept(BrushVisitor* visitor) const { |
| visitor->Visit(this); |
| } |
| |
| scoped_ptr<Brush> CloneBrush(const Brush* brush) { |
| DCHECK(brush); |
| |
| BrushCloner cloner; |
| brush->Accept(&cloner); |
| return cloner.PassClone(); |
| } |
| |
| bool IsNear(const ColorStopList& lhs, const ColorStopList& rhs, float epsilon) { |
| if (lhs.size() != rhs.size()) return false; |
| for (std::size_t i = 0; i != lhs.size(); ++i) { |
| if (!IsNear(lhs[i], rhs[i], epsilon)) return false; |
| } |
| return true; |
| } |
| |
| } // namespace render_tree |
| } // namespace cobalt |