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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.
//
#include "draco/compression/attributes/attributes_encoder.h"
#include "draco/core/varint_encoding.h"
#include "draco/draco_features.h"
namespace draco {
AttributesEncoder::AttributesEncoder()
: point_cloud_encoder_(nullptr), point_cloud_(nullptr) {}
AttributesEncoder::AttributesEncoder(int point_attrib_id)
: AttributesEncoder() {
AddAttributeId(point_attrib_id);
}
bool AttributesEncoder::Init(PointCloudEncoder *encoder, const PointCloud *pc) {
point_cloud_encoder_ = encoder;
point_cloud_ = pc;
return true;
}
bool AttributesEncoder::EncodeAttributesEncoderData(EncoderBuffer *out_buffer) {
// Encode data about all attributes.
EncodeVarint(num_attributes(), out_buffer);
for (uint32_t i = 0; i < num_attributes(); ++i) {
const int32_t att_id = point_attribute_ids_[i];
const PointAttribute *const pa = point_cloud_->attribute(att_id);
GeometryAttribute::Type type = pa->attribute_type();
#ifdef DRACO_TRANSCODER_SUPPORTED
// Attribute types TANGENT, MATERIAL, JOINTS, and WEIGHTS are not supported
// in the official bitstream. They will be encoded as GENERIC.
if (type > GeometryAttribute::GENERIC) {
type = GeometryAttribute::GENERIC;
}
#endif
out_buffer->Encode(static_cast<uint8_t>(type));
out_buffer->Encode(static_cast<uint8_t>(pa->data_type()));
out_buffer->Encode(static_cast<uint8_t>(pa->num_components()));
out_buffer->Encode(static_cast<uint8_t>(pa->normalized()));
EncodeVarint(pa->unique_id(), out_buffer);
}
return true;
}
} // namespace draco
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