// Copyright 2016 The Draco Authors. // // 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 DRACO_COMPRESSION_ATTRIBUTES_POINTS_SEQUENCER_H_ #define DRACO_COMPRESSION_ATTRIBUTES_POINTS_SEQUENCER_H_ #include #include "draco/attributes/point_attribute.h" namespace draco { // Class for generating a sequence of point ids that can be used to encode // or decode attribute values in a specific order. // See sequential_attribute_encoders/decoders_controller.h for more details. class PointsSequencer { public: PointsSequencer() : out_point_ids_(nullptr) {} virtual ~PointsSequencer() = default; // Fills the |out_point_ids| with the generated sequence of point ids. bool GenerateSequence(std::vector *out_point_ids) { out_point_ids_ = out_point_ids; return GenerateSequenceInternal(); } // Appends a point to the sequence. void AddPointId(PointIndex point_id) { out_point_ids_->push_back(point_id); } // Sets the correct mapping between point ids and value ids. I.e., the inverse // of the |out_point_ids|. In general, |out_point_ids_| does not contain // sufficient information to compute the inverse map, because not all point // ids are necessarily contained within the map. // Must be implemented for sequencers that are used by attribute decoders. virtual bool UpdatePointToAttributeIndexMapping(PointAttribute * /* attr */) { return false; } protected: // Method that needs to be implemented by the derived classes. The // implementation is responsible for filling |out_point_ids_| with the valid // sequence of point ids. virtual bool GenerateSequenceInternal() = 0; std::vector *out_point_ids() const { return out_point_ids_; } private: std::vector *out_point_ids_; }; } // namespace draco #endif // DRACO_COMPRESSION_ATTRIBUTES_POINTS_SEQUENCER_H_