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