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diff --git a/extern/draco/draco/src/draco/compression/config/compression_shared.h b/extern/draco/draco/src/draco/compression/config/compression_shared.h
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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_CONFIG_COMPRESSION_SHARED_H_
+#define DRACO_COMPRESSION_CONFIG_COMPRESSION_SHARED_H_
+
+#include <stdint.h>
+
+#include "draco/core/macros.h"
+#include "draco/draco_features.h"
+
+namespace draco {
+
+// Latest Draco bit-stream version.
+static constexpr uint8_t kDracoPointCloudBitstreamVersionMajor = 2;
+static constexpr uint8_t kDracoPointCloudBitstreamVersionMinor = 3;
+static constexpr uint8_t kDracoMeshBitstreamVersionMajor = 2;
+static constexpr uint8_t kDracoMeshBitstreamVersionMinor = 2;
+
+// Concatenated latest bit-stream version.
+static constexpr uint16_t kDracoPointCloudBitstreamVersion =
+    DRACO_BITSTREAM_VERSION(kDracoPointCloudBitstreamVersionMajor,
+                            kDracoPointCloudBitstreamVersionMinor);
+
+static constexpr uint16_t kDracoMeshBitstreamVersion = DRACO_BITSTREAM_VERSION(
+    kDracoMeshBitstreamVersionMajor, kDracoMeshBitstreamVersionMinor);
+
+// Currently, we support point cloud and triangular mesh encoding.
+// TODO(draco-eng) Convert enum to enum class (safety, not performance).
+enum EncodedGeometryType {
+  INVALID_GEOMETRY_TYPE = -1,
+  POINT_CLOUD = 0,
+  TRIANGULAR_MESH,
+};
+
+// List of encoding methods for point clouds.
+enum PointCloudEncodingMethod {
+  POINT_CLOUD_SEQUENTIAL_ENCODING = 0,
+  POINT_CLOUD_KD_TREE_ENCODING
+};
+
+// List of encoding methods for meshes.
+enum MeshEncoderMethod {
+  MESH_SEQUENTIAL_ENCODING = 0,
+  MESH_EDGEBREAKER_ENCODING,
+};
+
+// List of various attribute encoders supported by our framework. The entries
+// are used as unique identifiers of the encoders and their values should not
+// be changed!
+enum AttributeEncoderType {
+  BASIC_ATTRIBUTE_ENCODER = 0,
+  MESH_TRAVERSAL_ATTRIBUTE_ENCODER,
+  KD_TREE_ATTRIBUTE_ENCODER,
+};
+
+// List of various sequential attribute encoder/decoders that can be used in our
+// pipeline. The values represent unique identifiers used by the decoder and
+// they should not be changed.
+enum SequentialAttributeEncoderType {
+  SEQUENTIAL_ATTRIBUTE_ENCODER_GENERIC = 0,
+  SEQUENTIAL_ATTRIBUTE_ENCODER_INTEGER,
+  SEQUENTIAL_ATTRIBUTE_ENCODER_QUANTIZATION,
+  SEQUENTIAL_ATTRIBUTE_ENCODER_NORMALS,
+};
+
+// List of all prediction methods currently supported by our framework.
+enum PredictionSchemeMethod {
+  // Special value indicating that no prediction scheme was used.
+  PREDICTION_NONE = -2,
+  // Used when no specific prediction scheme is required.
+  PREDICTION_UNDEFINED = -1,
+  PREDICTION_DIFFERENCE = 0,
+  MESH_PREDICTION_PARALLELOGRAM = 1,
+  MESH_PREDICTION_MULTI_PARALLELOGRAM = 2,
+  MESH_PREDICTION_TEX_COORDS_DEPRECATED = 3,
+  MESH_PREDICTION_CONSTRAINED_MULTI_PARALLELOGRAM = 4,
+  MESH_PREDICTION_TEX_COORDS_PORTABLE = 5,
+  MESH_PREDICTION_GEOMETRIC_NORMAL = 6,
+  NUM_PREDICTION_SCHEMES
+};
+
+// List of all prediction scheme transforms used by our framework.
+enum PredictionSchemeTransformType {
+  PREDICTION_TRANSFORM_NONE = -1,
+  // Basic delta transform where the prediction is computed as difference the
+  // predicted and original value.
+  PREDICTION_TRANSFORM_DELTA = 0,
+  // An improved delta transform where all computed delta values are wrapped
+  // around a fixed interval which lowers the entropy.
+  PREDICTION_TRANSFORM_WRAP = 1,
+  // Specialized transform for normal coordinates using inverted tiles.
+  PREDICTION_TRANSFORM_NORMAL_OCTAHEDRON = 2,
+  // Specialized transform for normal coordinates using canonicalized inverted
+  // tiles.
+  PREDICTION_TRANSFORM_NORMAL_OCTAHEDRON_CANONICALIZED = 3,
+};
+
+// List of all mesh traversal methods supported by Draco framework.
+enum MeshTraversalMethod {
+  MESH_TRAVERSAL_DEPTH_FIRST = 0,
+  MESH_TRAVERSAL_PREDICTION_DEGREE = 1,
+  NUM_TRAVERSAL_METHODS
+};
+
+// List of all variant of the edgebreaker method that is used for compression
+// of mesh connectivity.
+enum MeshEdgebreakerConnectivityEncodingMethod {
+  MESH_EDGEBREAKER_STANDARD_ENCODING = 0,
+  MESH_EDGEBREAKER_PREDICTIVE_ENCODING = 1,  // Deprecated.
+  MESH_EDGEBREAKER_VALENCE_ENCODING = 2,
+};
+
+// Draco header V1
+struct DracoHeader {
+  int8_t draco_string[5];
+  uint8_t version_major;
+  uint8_t version_minor;
+  uint8_t encoder_type;
+  uint8_t encoder_method;
+  uint16_t flags;
+};
+
+enum NormalPredictionMode {
+  ONE_TRIANGLE = 0,  // To be deprecated.
+  TRIANGLE_AREA = 1,
+};
+
+// Different methods used for symbol entropy encoding.
+enum SymbolCodingMethod {
+  SYMBOL_CODING_TAGGED = 0,
+  SYMBOL_CODING_RAW = 1,
+  NUM_SYMBOL_CODING_METHODS,
+};
+
+// Mask for setting and getting the bit for metadata in |flags| of header.
+#define METADATA_FLAG_MASK 0x8000
+
+}  // namespace draco
+
+#endif  // DRACO_COMPRESSION_CONFIG_COMPRESSION_SHARED_H_