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 // 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 #include #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& 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 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& 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(); } const Builder& data() const { return data_; } private: const Builder data_; }; } // namespace render_tree } // namespace cobalt #endif // COBALT_RENDER_TREE_MATRIX_TRANSFORM_NODE_H_