108 lines
4.0 KiB
C
108 lines
4.0 KiB
C
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// Copyright 2016 The Draco Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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#ifndef DRACO_IO_MESH_IO_H_
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#define DRACO_IO_MESH_IO_H_
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#include "draco/compression/config/compression_shared.h"
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#include "draco/compression/decode.h"
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#include "draco/compression/expert_encode.h"
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#include "draco/core/options.h"
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namespace draco {
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template <typename OutStreamT>
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OutStreamT WriteMeshIntoStream(const Mesh *mesh, OutStreamT &&os,
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MeshEncoderMethod method,
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const EncoderOptions &options) {
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EncoderBuffer buffer;
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EncoderOptions local_options = options;
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ExpertEncoder encoder(*mesh);
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encoder.Reset(local_options);
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encoder.SetEncodingMethod(method);
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if (!encoder.EncodeToBuffer(&buffer).ok()) {
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os.setstate(std::ios_base::badbit);
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return os;
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}
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os.write(static_cast<const char *>(buffer.data()), buffer.size());
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return os;
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}
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template <typename OutStreamT>
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OutStreamT WriteMeshIntoStream(const Mesh *mesh, OutStreamT &&os,
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MeshEncoderMethod method) {
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const EncoderOptions options = EncoderOptions::CreateDefaultOptions();
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return WriteMeshIntoStream(mesh, os, method, options);
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}
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template <typename OutStreamT>
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OutStreamT &WriteMeshIntoStream(const Mesh *mesh, OutStreamT &&os) {
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return WriteMeshIntoStream(mesh, os, MESH_EDGEBREAKER_ENCODING);
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}
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template <typename InStreamT>
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InStreamT &ReadMeshFromStream(std::unique_ptr<Mesh> *mesh, InStreamT &&is) {
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// Determine size of stream and write into a vector
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const auto start_pos = is.tellg();
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is.seekg(0, std::ios::end);
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const std::streampos is_size = is.tellg() - start_pos;
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is.seekg(start_pos);
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std::vector<char> data(is_size);
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is.read(&data[0], is_size);
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// Create a mesh from that data.
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DecoderBuffer buffer;
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buffer.Init(&data[0], data.size());
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Decoder decoder;
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auto statusor = decoder.DecodeMeshFromBuffer(&buffer);
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*mesh = std::move(statusor).value();
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if (!statusor.ok() || *mesh == nullptr) {
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is.setstate(std::ios_base::badbit);
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}
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return is;
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}
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// Reads a mesh from a file. The function automatically chooses the correct
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// decoder based on the extension of the files. Currently, .obj and .ply files
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// are supported. Other file extensions are processed by the default
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// draco::MeshDecoder.
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// Returns nullptr with an error status if the decoding failed.
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StatusOr<std::unique_ptr<Mesh>> ReadMeshFromFile(const std::string &file_name);
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// Reads a mesh from a file. The function does the same thing as the previous
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// one except using metadata to encode additional information when
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// |use_metadata| is set to true.
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// Returns nullptr with an error status if the decoding failed.
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StatusOr<std::unique_ptr<Mesh>> ReadMeshFromFile(const std::string &file_name,
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bool use_metadata);
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// Reads a mesh from a file. Reading is configured with |options|:
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// use_metadata : Read obj file info like material names and object names into
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// metadata. Default is false.
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// The second form returns the files associated with the mesh via the
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// |mesh_files| argument.
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// Returns nullptr with an error status if the decoding failed.
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StatusOr<std::unique_ptr<Mesh>> ReadMeshFromFile(const std::string &file_name,
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const Options &options);
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StatusOr<std::unique_ptr<Mesh>> ReadMeshFromFile(
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const std::string &file_name, const Options &options,
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std::vector<std::string> *mesh_files);
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} // namespace draco
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#endif // DRACO_IO_MESH_IO_H_
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