| // Copyright 2016 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. |
| |
| #ifndef COBALT_RENDER_TREE_MATRIX_TRANSFORM_NODE_H_ |
| #define COBALT_RENDER_TREE_MATRIX_TRANSFORM_NODE_H_ |
| |
| #include <algorithm> |
| #include <vector> |
| |
| #include "base/compiler_specific.h" |
| #include "cobalt/base/type_id.h" |
| #include "cobalt/math/matrix3_f.h" |
| #include "cobalt/render_tree/node.h" |
| |
| namespace cobalt { |
| namespace render_tree { |
| |
| // A MatrixTransformNode applies a specified affine matrix transform, |
| // |transform| to a specified sub render tree node, |source|. |
| class MatrixTransformNode : public Node { |
| public: |
| struct Builder { |
| Builder(const scoped_refptr<Node>& source, const math::Matrix3F& transform) |
| : source(source), transform(transform) {} |
| |
| bool operator==(const Builder& other) const { |
| return source == other.source && transform == other.transform; |
| } |
| |
| // The subtree that will be rendered with |transform| applied to it. |
| scoped_refptr<Node> source; |
| |
| // The matrix transform that will be applied to the subtree. It is an |
| // affine 3x3 matrix to be applied to 2D points. |
| math::Matrix3F transform; |
| }; |
| |
| MatrixTransformNode(const scoped_refptr<Node>& source, |
| const math::Matrix3F& transform) |
| : data_(source, transform) {} |
| |
| explicit MatrixTransformNode(const Builder& builder) : data_(builder) {} |
| |
| void Accept(NodeVisitor* visitor) override; |
| math::RectF GetBounds() const override; |
| |
| base::TypeId GetTypeId() const override { |
| return base::GetTypeId<MatrixTransformNode>(); |
| } |
| |
| const Builder& data() const { return data_; } |
| |
| private: |
| const Builder data_; |
| }; |
| |
| } // namespace render_tree |
| } // namespace cobalt |
| |
| #endif // COBALT_RENDER_TREE_MATRIX_TRANSFORM_NODE_H_ |