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https://git.mirrors.martin98.com/https://github.com/google/draco
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73bb3c8530
- Improved compression for triangular meshes (~10%) - Added WebAssembly decoder - Code cleanup + robustness fixes
124 lines
4.1 KiB
C++
124 lines
4.1 KiB
C++
// 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_COMPRESSION_CONFIG_COMPRESSION_SHARED_H_
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#define DRACO_COMPRESSION_CONFIG_COMPRESSION_SHARED_H_
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#include <stdint.h>
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namespace draco {
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// Latest Draco bit-stream version.
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static constexpr uint8_t kDracoBitstreamVersionMajor = 1;
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static constexpr uint8_t kDracoBitstreamVersionMinor = 2;
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// Macro that converts the Draco bit-stream into one uint16_t number. Useful
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// mostly when checking version numbers.
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#define DRACO_BITSTREAM_VERSION(MAJOR, MINOR) \
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((static_cast<uint16_t>(MAJOR) << 8) | MINOR)
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// Concatenated latest bit-stream version.
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static constexpr uint16_t kDracoBitstreamVersion = DRACO_BITSTREAM_VERSION(
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kDracoBitstreamVersionMajor, kDracoBitstreamVersionMinor);
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// Currently, we support point cloud and triangular mesh encoding.
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enum EncodedGeometryType {
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INVALID_GEOMETRY_TYPE = -1,
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POINT_CLOUD = 0,
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TRIANGULAR_MESH,
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};
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// List of encoding methods for point clouds.
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enum PointCloudEncodingMethod {
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POINT_CLOUD_SEQUENTIAL_ENCODING = 0,
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POINT_CLOUD_KD_TREE_ENCODING
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};
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// List of encoding methods for meshes.
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enum MeshEncoderMethod {
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MESH_SEQUENTIAL_ENCODING = 0,
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MESH_EDGEBREAKER_ENCODING,
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};
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// List of various attribute encoders supported by our framework. The entries
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// are used as unique identifiers of the encoders and their values should not
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// be changed!
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enum AttributeEncoderType {
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BASIC_ATTRIBUTE_ENCODER = 0,
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MESH_TRAVERSAL_ATTRIBUTE_ENCODER,
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KD_TREE_ATTRIBUTE_ENCODER,
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};
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// List of various sequential attribute encoder/decoders that can be used in our
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// pipeline. The values represent unique identifiers used by the decoder and
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// they should not be changed.
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enum SequentialAttributeEncoderType {
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SEQUENTIAL_ATTRIBUTE_ENCODER_GENERIC = 0,
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SEQUENTIAL_ATTRIBUTE_ENCODER_INTEGER,
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SEQUENTIAL_ATTRIBUTE_ENCODER_QUANTIZATION,
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SEQUENTIAL_ATTRIBUTE_ENCODER_NORMALS,
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};
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// List of all prediction methods currently supported by our framework.
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enum PredictionSchemeMethod {
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// Special value indicating that no prediction scheme was used.
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PREDICTION_NONE = -2,
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// Used when no specific prediction scheme is required.
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PREDICTION_UNDEFINED = -1,
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PREDICTION_DIFFERENCE = 0,
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MESH_PREDICTION_PARALLELOGRAM = 1,
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MESH_PREDICTION_MULTI_PARALLELOGRAM = 2,
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MESH_PREDICTION_TEX_COORDS = 3,
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MESH_PREDICTION_CONSTRAINED_MULTI_PARALLELOGRAM = 4,
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NUM_PREDICTION_SCHEMES
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};
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// List of all prediction scheme transforms used by our framework.
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enum PredictionSchemeTransformType {
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PREDICTION_TRANSFORM_NONE = -1,
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// Basic delta transform where the prediction is computed as difference the
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// predicted and original value.
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PREDICTION_TRANSFORM_DELTA = 0,
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// An improved delta transform where all computed delta values are wrapped
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// around a fixed interval which lowers the entropy.
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PREDICTION_TRANSFORM_WRAP = 1,
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// Specialized transform for normal coordinates using inverted tiles.
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PREDICTION_TRANSFORM_NORMAL_OCTAHEDRON = 2,
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// Specialized transform for normal coordinates using canonicalized inverted
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// tiles.
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PREDICTION_TRANSFORM_NORMAL_OCTAHEDRON_CANONICALIZED = 3,
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};
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// List of all mesh traversal methods supported by Draco framework.
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enum MeshTraversalMethod {
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MESH_TRAVERSAL_DEPTH_FIRST = 0,
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MESH_TRAVERSAL_PREDICTION_DEGREE = 1,
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MESH_TRAVERSAL_RESERVED_1 = 2,
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MESH_TRAVERSAL_RESERVED_2 = 3,
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};
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// Draco header V1
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struct DracoHeader {
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int8_t draco_string[5];
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uint8_t version_major;
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uint8_t version_minor;
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uint8_t encoder_type;
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uint8_t encoder_method;
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uint16_t flags;
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};
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} // namespace draco
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#endif // DRACO_COMPRESSION_CONFIG_COMPRESSION_SHARED_H_
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