Mercurial > hg > orthanc
view Core/Images/PamReader.cpp @ 2703:f77c7b48f798
fix
author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Thu, 05 Jul 2018 21:02:50 +0200 |
parents | 52217dc47a4e |
children | 5c18a22cb981 |
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/** * Orthanc - A Lightweight, RESTful DICOM Store * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics * Department, University Hospital of Liege, Belgium * Copyright (C) 2017-2018 Osimis S.A., Belgium * * This program is free software: you can redistribute it and/or * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation, either version 3 of the * License, or (at your option) any later version. * * In addition, as a special exception, the copyright holders of this * program give permission to link the code of its release with the * OpenSSL project's "OpenSSL" library (or with modified versions of it * that use the same license as the "OpenSSL" library), and distribute * the linked executables. You must obey the GNU General Public License * in all respects for all of the code used other than "OpenSSL". If you * modify file(s) with this exception, you may extend this exception to * your version of the file(s), but you are not obligated to do so. If * you do not wish to do so, delete this exception statement from your * version. If you delete this exception statement from all source files * in the program, then also delete it here. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. **/ #include "../PrecompiledHeaders.h" #include "PamReader.h" #include "../Endianness.h" #include "../OrthancException.h" #include "../Toolbox.h" #include <istream> #include <sstream> #include <fstream> #if ORTHANC_SANDBOXED == 0 # include "../SystemToolbox.h" #endif #include <string.h> namespace Orthanc { namespace { void GetPixelFormat(PixelFormat& format, unsigned int& bytesPerChannel, const unsigned int& maxValue, const unsigned int& channelCount, const char* tupleType) { if (strcmp(tupleType, "GRAYSCALE") == 0 && channelCount == 1) { if (maxValue == 255) { format = PixelFormat_Grayscale8; bytesPerChannel = 1; return; } else if (maxValue == 65535) { format = PixelFormat_Grayscale16; bytesPerChannel = 2; return; } } else if (strcmp(tupleType, "RGB") == 0 && channelCount == 3) { if (maxValue == 255) { format = PixelFormat_RGB24; bytesPerChannel = 1; return; } else if (maxValue == 65535) { format = PixelFormat_RGB48; bytesPerChannel = 2; return; } } throw OrthancException(ErrorCode_NotImplemented); } void ReadDelimiter(std::istream& input, const char* expectedDelimiter) { std::string delimiter; input >> delimiter; if (delimiter != expectedDelimiter) { throw OrthancException(ErrorCode_BadFileFormat); } } unsigned int ReadKeyValueUint(std::istream& input, const char* expectedKey) { std::string key; unsigned int value; input >> key >> value; if (key != expectedKey) { throw OrthancException(ErrorCode_BadFileFormat); } return value; } std::string ReadKeyValueString(std::istream& input, const char* expectedKey) { std::string key; std::string value; input >> key >> value; if (key != expectedKey) { throw OrthancException(ErrorCode_BadFileFormat); } return value; } } void PamReader::ReadFromStream(std::istream& input) { ReadDelimiter(input, "P7"); unsigned int width = ReadKeyValueUint(input, "WIDTH"); unsigned int height = ReadKeyValueUint(input, "HEIGHT"); unsigned int channelCount = ReadKeyValueUint(input, "DEPTH"); unsigned int maxValue = ReadKeyValueUint(input, "MAXVAL"); std::string tupleType = ReadKeyValueString(input, "TUPLTYPE"); ReadDelimiter(input, "ENDHDR"); // skip last EOL char tmp[16]; input.getline(tmp, 16); unsigned int bytesPerChannel; PixelFormat format; GetPixelFormat(format, bytesPerChannel, maxValue, channelCount, tupleType.c_str()); // read the pixels data unsigned int sizeInBytes = width * height * channelCount * bytesPerChannel; data_.reserve(sizeInBytes); input.read(data_.data(), sizeInBytes); AssignWritable(format, width, height, width * channelCount * bytesPerChannel, data_.data()); // swap bytes if (Toolbox::DetectEndianness() == Endianness_Little && bytesPerChannel == 2) { uint16_t* pixel = NULL; for (unsigned int h = 0; h < height; ++h) { pixel = reinterpret_cast<uint16_t*> (data_.data() + h * width * channelCount * bytesPerChannel); for (unsigned int w = 0; w < (width * channelCount); ++w, ++pixel) { *pixel = htobe16(*pixel); } } } } #if ORTHANC_SANDBOXED == 0 void PamReader::ReadFromFile(const std::string& filename) { std::ifstream inputStream(filename, std::ofstream::binary); ReadFromStream(inputStream); } #endif void PamReader::ReadFromMemory(const void* buffer, size_t size) { std::istringstream inputStream(std::string(reinterpret_cast<const char*>(buffer), size)); ReadFromStream(inputStream); } void PamReader::ReadFromMemory(const std::string& buffer) { std::istringstream inputStream(buffer); ReadFromStream(inputStream); } }