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diff --git a/extern/draco/draco/src/draco/compression/attributes/prediction_schemes/mesh_prediction_scheme_tex_coords_portable_encoder.h b/extern/draco/draco/src/draco/compression/attributes/prediction_schemes/mesh_prediction_scheme_tex_coords_portable_encoder.h
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+++ b/extern/draco/draco/src/draco/compression/attributes/prediction_schemes/mesh_prediction_scheme_tex_coords_portable_encoder.h
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+// Copyright 2017 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_PREDICTION_SCHEMES_MESH_PREDICTION_SCHEME_TEX_COORDS_PORTABLE_ENCODER_H_
+#define DRACO_COMPRESSION_ATTRIBUTES_PREDICTION_SCHEMES_MESH_PREDICTION_SCHEME_TEX_COORDS_PORTABLE_ENCODER_H_
+
+#include "draco/compression/attributes/prediction_schemes/mesh_prediction_scheme_encoder.h"
+#include "draco/compression/attributes/prediction_schemes/mesh_prediction_scheme_tex_coords_portable_predictor.h"
+#include "draco/compression/bit_coders/rans_bit_encoder.h"
+
+namespace draco {
+
+// Prediction scheme designed for predicting texture coordinates from known
+// spatial position of vertices. For isometric parametrizations, the ratios
+// between triangle edge lengths should be about the same in both the spatial
+// and UV coordinate spaces, which makes the positions a good predictor for the
+// UV coordinates. Note that this may not be the optimal approach for other
+// parametrizations such as projective ones.
+template <typename DataTypeT, class TransformT, class MeshDataT>
+class MeshPredictionSchemeTexCoordsPortableEncoder
+    : public MeshPredictionSchemeEncoder<DataTypeT, TransformT, MeshDataT> {
+ public:
+  using CorrType = typename MeshPredictionSchemeEncoder<DataTypeT, TransformT,
+                                                        MeshDataT>::CorrType;
+  MeshPredictionSchemeTexCoordsPortableEncoder(const PointAttribute *attribute,
+                                               const TransformT &transform,
+                                               const MeshDataT &mesh_data)
+      : MeshPredictionSchemeEncoder<DataTypeT, TransformT, MeshDataT>(
+            attribute, transform, mesh_data),
+        predictor_(mesh_data) {}
+
+  bool ComputeCorrectionValues(
+      const DataTypeT *in_data, CorrType *out_corr, int size,
+      int num_components, const PointIndex *entry_to_point_id_map) override;
+
+  bool EncodePredictionData(EncoderBuffer *buffer) override;
+
+  PredictionSchemeMethod GetPredictionMethod() const override {
+    return MESH_PREDICTION_TEX_COORDS_PORTABLE;
+  }
+
+  bool IsInitialized() const override {
+    if (!predictor_.IsInitialized()) {
+      return false;
+    }
+    if (!this->mesh_data().IsInitialized()) {
+      return false;
+    }
+    return true;
+  }
+
+  int GetNumParentAttributes() const override { return 1; }
+
+  GeometryAttribute::Type GetParentAttributeType(int i) const override {
+    DRACO_DCHECK_EQ(i, 0);
+    (void)i;
+    return GeometryAttribute::POSITION;
+  }
+
+  bool SetParentAttribute(const PointAttribute *att) override {
+    if (att->attribute_type() != GeometryAttribute::POSITION) {
+      return false;  // Invalid attribute type.
+    }
+    if (att->num_components() != 3) {
+      return false;  // Currently works only for 3 component positions.
+    }
+    predictor_.SetPositionAttribute(*att);
+    return true;
+  }
+
+ private:
+  MeshPredictionSchemeTexCoordsPortablePredictor<DataTypeT, MeshDataT>
+      predictor_;
+};
+
+template <typename DataTypeT, class TransformT, class MeshDataT>
+bool MeshPredictionSchemeTexCoordsPortableEncoder<DataTypeT, TransformT,
+                                                  MeshDataT>::
+    ComputeCorrectionValues(const DataTypeT *in_data, CorrType *out_corr,
+                            int size, int num_components,
+                            const PointIndex *entry_to_point_id_map) {
+  predictor_.SetEntryToPointIdMap(entry_to_point_id_map);
+  this->transform().Init(in_data, size, num_components);
+  // We start processing from the end because this prediction uses data from
+  // previous entries that could be overwritten when an entry is processed.
+  for (int p =
+           static_cast<int>(this->mesh_data().data_to_corner_map()->size() - 1);
+       p >= 0; --p) {
+    const CornerIndex corner_id = this->mesh_data().data_to_corner_map()->at(p);
+    predictor_.template ComputePredictedValue<true>(corner_id, in_data, p);
+
+    const int dst_offset = p * num_components;
+    this->transform().ComputeCorrection(in_data + dst_offset,
+                                        predictor_.predicted_value(),
+                                        out_corr + dst_offset);
+  }
+  return true;
+}
+
+template <typename DataTypeT, class TransformT, class MeshDataT>
+bool MeshPredictionSchemeTexCoordsPortableEncoder<
+    DataTypeT, TransformT, MeshDataT>::EncodePredictionData(EncoderBuffer
+                                                                *buffer) {
+  // Encode the delta-coded orientations using arithmetic coding.
+  const int32_t num_orientations = predictor_.num_orientations();
+  buffer->Encode(num_orientations);
+  bool last_orientation = true;
+  RAnsBitEncoder encoder;
+  encoder.StartEncoding();
+  for (int i = 0; i < num_orientations; ++i) {
+    const bool orientation = predictor_.orientation(i);
+    encoder.EncodeBit(orientation == last_orientation);
+    last_orientation = orientation;
+  }
+  encoder.EndEncoding(buffer);
+  return MeshPredictionSchemeEncoder<DataTypeT, TransformT,
+                                     MeshDataT>::EncodePredictionData(buffer);
+}
+
+}  // namespace draco
+
+#endif  // DRACO_COMPRESSION_ATTRIBUTES_PREDICTION_SCHEMES_MESH_PREDICTION_SCHEME_TEX_COORDS_PORTABLE_ENCODER_H_