Mercurial > hg > orthanc
view Core/Images/PamWriter.cpp @ 2833:afb581263e1d Orthanc-1.4.2
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author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Thu, 20 Sep 2018 13:28:18 +0200 |
parents | 6356e2ceb493 |
children | 4e43e67f8ecf |
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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 "PamWriter.h" #include "../Endianness.h" #include "../OrthancException.h" #include "../Toolbox.h" #include <boost/lexical_cast.hpp> namespace Orthanc { static void GetPixelFormatInfo(const PixelFormat& format, unsigned int& maxValue, unsigned int& channelCount, unsigned int& bytesPerChannel, std::string& tupleType) { switch (format) { case PixelFormat_Grayscale8: maxValue = 255; channelCount = 1; bytesPerChannel = 1; tupleType = "GRAYSCALE"; break; case PixelFormat_Grayscale16: maxValue = 65535; channelCount = 1; bytesPerChannel = 2; tupleType = "GRAYSCALE"; break; case PixelFormat_RGB24: maxValue = 255; channelCount = 3; bytesPerChannel = 1; tupleType = "RGB"; break; case PixelFormat_RGB48: maxValue = 255; channelCount = 3; bytesPerChannel = 2; tupleType = "RGB"; break; default: throw OrthancException(ErrorCode_NotImplemented); } } void PamWriter::WriteToMemoryInternal(std::string& target, unsigned int width, unsigned int height, unsigned int sourcePitch, PixelFormat format, const void* buffer) { unsigned int maxValue, channelCount, bytesPerChannel; std::string tupleType; GetPixelFormatInfo(format, maxValue, channelCount, bytesPerChannel, tupleType); target = (std::string("P7") + std::string("\nWIDTH ") + boost::lexical_cast<std::string>(width) + std::string("\nHEIGHT ") + boost::lexical_cast<std::string>(height) + std::string("\nDEPTH ") + boost::lexical_cast<std::string>(channelCount) + std::string("\nMAXVAL ") + boost::lexical_cast<std::string>(maxValue) + std::string("\nTUPLTYPE ") + tupleType + std::string("\nENDHDR\n")); if (bytesPerChannel != 1 && bytesPerChannel != 2) { throw OrthancException(ErrorCode_NotImplemented); } size_t targetPitch = channelCount * bytesPerChannel * width; size_t offset = target.size(); target.resize(offset + targetPitch * height); assert(target.size() != 0); if (Toolbox::DetectEndianness() == Endianness_Little && bytesPerChannel == 2) { // Byte swapping for (unsigned int h = 0; h < height; ++h) { const uint16_t* p = reinterpret_cast<const uint16_t*> (reinterpret_cast<const uint8_t*>(buffer) + h * sourcePitch); uint16_t* q = reinterpret_cast<uint16_t*> (reinterpret_cast<uint8_t*>(&target[offset]) + h * targetPitch); for (unsigned int w = 0; w < width * channelCount; ++w) { // memcpy() is necessary to avoid segmentation fault if the // "pixel" pointer is not 16-bit aligned (which is the case // if "offset" is an odd number). Check out issue #99: // https://bitbucket.org/sjodogne/orthanc/issues/99 uint16_t v = htobe16(*p); memcpy(q, &v, sizeof(uint16_t)); p++; q++; } } } else { // Either "bytesPerChannel == 1" (and endianness is not // relevant), or we run on a big endian architecture (and no // byte swapping is necessary, as PAM uses big endian) for (unsigned int h = 0; h < height; ++h) { const void* p = reinterpret_cast<const uint8_t*>(buffer) + h * sourcePitch; void* q = reinterpret_cast<uint8_t*>(&target[offset]) + h * targetPitch; memcpy(q, p, targetPitch); } } } }