Mercurial > hg > orthanc
view OrthancFramework/Sources/Images/PamWriter.cpp @ 5923:a85c0dca4809 find-refactoring
simplification by removing MultipleTags and MultipleMetadata in protobuf
author | Sebastien Jodogne <s.jodogne@gmail.com> |
---|---|
date | Mon, 16 Dec 2024 11:24:49 +0100 |
parents | f7adfb22e20e |
children |
line wrap: on
line source
/** * Orthanc - A Lightweight, RESTful DICOM Store * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics * Department, University Hospital of Liege, Belgium * Copyright (C) 2017-2023 Osimis S.A., Belgium * Copyright (C) 2024-2024 Orthanc Team SRL, Belgium * Copyright (C) 2021-2024 Sebastien Jodogne, ICTEAM UCLouvain, Belgium * * This program is free software: you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public License * as published by the Free Software Foundation, either version 3 of * the License, or (at your option) any later version. * * 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 * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser 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 <cassert> #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_SignedGrayscale16: 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) { /** * This is Little-Endian computer, and PAM uses * Big-Endian. Need to do a 16-bit swap. We DON'T use * "htobe16()", as the latter only works if the "pixel" * pointer is 16-bit aligned (which is not the case if * "offset" is an odd number), and the trick that was used * in Orthanc <= 1.8.0 (i.e. make a "memcpy()" to a local * uint16_t variable) doesn't seem work for WebAssembly. We * thus use a plain old C implementation. Check out issue * #99: https://orthanc.uclouvain.be/bugs/show_bug.cgi?id=99 **/ const uint8_t* a = reinterpret_cast<const uint8_t*>(p); uint8_t* b = reinterpret_cast<uint8_t*>(q); b[0] = a[1]; b[1] = a[0]; 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); } } } }