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// 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_MESH_MESH_ENCODER_H_
#define DRACO_COMPRESSION_MESH_MESH_ENCODER_H_
#include "draco/compression/attributes/mesh_attribute_indices_encoding_data.h"
#include "draco/compression/point_cloud/point_cloud_encoder.h"
#include "draco/mesh/mesh.h"
#include "draco/mesh/mesh_attribute_corner_table.h"
namespace draco {
// Abstract base class for all mesh encoders. It provides some basic
// functionality that's shared between different encoders.
class MeshEncoder : public PointCloudEncoder {
public:
MeshEncoder();
// Sets the mesh that is going be encoded. Must be called before the Encode()
// method.
void SetMesh(const Mesh &m);
EncodedGeometryType GetGeometryType() const override {
return TRIANGULAR_MESH;
}
// Returns the number of faces that were encoded during the last Encode().
// function call. Valid only if "store_number_of_encoded_faces" flag was set
// in the provided EncoderOptions.
size_t num_encoded_faces() const { return num_encoded_faces_; }
// Returns the base connectivity of the encoded mesh (or nullptr if it is not
// initialized).
virtual const CornerTable *GetCornerTable() const { return nullptr; }
// Returns the attribute connectivity data or nullptr if it does not exist.
virtual const MeshAttributeCornerTable *GetAttributeCornerTable(
int /* att_id */) const {
return nullptr;
}
// Returns the encoding data for a given attribute or nullptr when the data
// does not exist.
virtual const MeshAttributeIndicesEncodingData *GetAttributeEncodingData(
int /* att_id */) const {
return nullptr;
}
const Mesh *mesh() const { return mesh_; }
protected:
Status EncodeGeometryData() override;
// Needs to be implemented by the derived classes.
virtual Status EncodeConnectivity() = 0;
// Computes and sets the num_encoded_faces_ for the encoder.
virtual void ComputeNumberOfEncodedFaces() = 0;
void set_mesh(const Mesh *mesh) { mesh_ = mesh; }
void set_num_encoded_faces(size_t num_faces) {
num_encoded_faces_ = num_faces;
}
private:
const Mesh *mesh_;
size_t num_encoded_faces_;
};
} // namespace draco
#endif // DRACO_COMPRESSION_MESH_MESH_ENCODER_H_
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