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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_IO_PLY_PROPERTY_READER_H_
#define DRACO_IO_PLY_PROPERTY_READER_H_
#include <functional>
#include "draco/io/ply_reader.h"
namespace draco {
// Class for reading PlyProperty with a given type, performing data conversion
// if necessary.
template <typename ReadTypeT>
class PlyPropertyReader {
public:
explicit PlyPropertyReader(const PlyProperty *property)
: property_(property) {
// Find the suitable function for converting values.
switch (property->data_type()) {
case DT_UINT8:
convert_value_func_ = [=](int val_id) {
return this->ConvertValue<uint8_t>(val_id);
};
break;
case DT_INT8:
convert_value_func_ = [=](int val_id) {
return this->ConvertValue<int8_t>(val_id);
};
break;
case DT_UINT16:
convert_value_func_ = [=](int val_id) {
return this->ConvertValue<uint16_t>(val_id);
};
break;
case DT_INT16:
convert_value_func_ = [=](int val_id) {
return this->ConvertValue<int16_t>(val_id);
};
break;
case DT_UINT32:
convert_value_func_ = [=](int val_id) {
return this->ConvertValue<uint32_t>(val_id);
};
break;
case DT_INT32:
convert_value_func_ = [=](int val_id) {
return this->ConvertValue<int32_t>(val_id);
};
break;
case DT_FLOAT32:
convert_value_func_ = [=](int val_id) {
return this->ConvertValue<float>(val_id);
};
break;
case DT_FLOAT64:
convert_value_func_ = [=](int val_id) {
return this->ConvertValue<double>(val_id);
};
break;
default:
break;
}
}
ReadTypeT ReadValue(int value_id) const {
return convert_value_func_(value_id);
}
private:
template <typename SourceTypeT>
ReadTypeT ConvertValue(int value_id) const {
const void *const address = property_->GetDataEntryAddress(value_id);
const SourceTypeT src_val = *reinterpret_cast<const SourceTypeT *>(address);
return static_cast<ReadTypeT>(src_val);
}
const PlyProperty *property_;
std::function<ReadTypeT(int)> convert_value_func_;
};
} // namespace draco
#endif // DRACO_IO_PLY_PROPERTY_READER_H_
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