Mercurial > hg > orthanc-wsi
diff Framework/TiffReader.cpp @ 297:c1687b8fc800
refactoring
author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Tue, 18 Jul 2023 07:13:36 +0200 |
parents | |
children | 7020852a8fa9 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/Framework/TiffReader.cpp Tue Jul 18 07:13:36 2023 +0200 @@ -0,0 +1,131 @@ +/** + * 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) 2021-2023 Sebastien Jodogne, ICTEAM UCLouvain, Belgium + * + * This program is free software: you can redistribute it and/or + * modify it under the terms of the GNU Affero 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 + * Affero General Public License for more details. + * + * You should have received a copy of the GNU Affero General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + **/ + + +#include "TiffReader.h" + +#include <Logging.h> +#include <OrthancException.h> + +namespace OrthancWSI +{ + TiffReader::TiffReader(const std::string& path) + { + tiff_ = TIFFOpen(path.c_str(), "r"); + if (tiff_ == NULL) + { + throw Orthanc::OrthancException(Orthanc::ErrorCode_InexistentFile, + "libtiff cannot open: " + path); + } + } + + + TiffReader::~TiffReader() + { + if (tiff_) + { + TIFFClose(tiff_); + tiff_ = NULL; + } + } + + + bool TiffReader::GetCurrentDirectoryInformation(ImageCompression& compression, + Orthanc::PixelFormat& pixelFormat, + Orthanc::PhotometricInterpretation& photometric) + { + uint16_t c; + if (!TIFFGetField(tiff_, TIFFTAG_COMPRESSION, &c)) + { + return false; + } + + switch (c) + { + case COMPRESSION_NONE: + compression = ImageCompression_None; + break; + + case COMPRESSION_JPEG: + compression = ImageCompression_Jpeg; + break; + + default: + return false; + } + + // http://www.awaresystems.be/imaging/tiff/tifftags/baseline.html + + uint16_t channels, photometricTiff, bpp, planar; + if (!TIFFGetField(tiff_, TIFFTAG_SAMPLESPERPIXEL, &channels) || + channels == 0 || + !TIFFGetField(tiff_, TIFFTAG_PHOTOMETRIC, &photometricTiff) || + !TIFFGetField(tiff_, TIFFTAG_BITSPERSAMPLE, &bpp) || + !TIFFGetField(tiff_, TIFFTAG_PLANARCONFIG, &planar)) + { + return false; + } + + if (compression == ImageCompression_Jpeg && + channels == 3 && // This is a color image + bpp == 8 && + planar == PLANARCONFIG_CONTIG) // This is interleaved RGB + { + pixelFormat = Orthanc::PixelFormat_RGB24; + + switch (photometricTiff) + { + case PHOTOMETRIC_YCBCR: + photometric = Orthanc::PhotometricInterpretation_YBRFull422; + break; + + case PHOTOMETRIC_RGB: + photometric = Orthanc::PhotometricInterpretation_RGB; + break; + + default: + LOG(ERROR) << "Unknown photometric interpretation in TIFF: " << photometricTiff; + return false; + } + } + else if (compression == ImageCompression_None && + channels == 3 && // This is a color image + bpp == 8 && + planar == PLANARCONFIG_CONTIG) // This is interleaved RGB + { + pixelFormat = Orthanc::PixelFormat_RGB24; + photometric = Orthanc::PhotometricInterpretation_RGB; + } + else if (compression == ImageCompression_Jpeg && + channels == 1 && // This is a grayscale image + bpp == 8) + { + pixelFormat = Orthanc::PixelFormat_Grayscale8; + photometric = Orthanc::PhotometricInterpretation_Monochrome2; + } + else + { + return false; + } + + return true; + } +}