65 lines
1.8 KiB
C
65 lines
1.8 KiB
C
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// vim: set tabstop=4 shiftwidth=4 expandtab
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/*
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Gwenview: an image viewer
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Copyright 2007 Aurélien Gâteau <agateau@kde.org>
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#ifndef JPEGERRORMANAGER_H
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#define JPEGERRORMANAGER_H
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#include <csetjmp>
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extern "C" {
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#define XMD_H
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#include <jpeglib.h>
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#undef const
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}
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namespace Gwenview
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{
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/**
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* A simple error manager which overrides jpeg_error_mgr.error_exit to avoid
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* calls to exit(). It uses setjmp, which I don't like, but I don't fill like
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* introducing exceptions to the code base for now.
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*
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* In order to use it, give an instance of it to jpeg_decompress_struct.err,
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* then call setjmp(errorManager.jmp_buffer)
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*/
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struct JPEGErrorManager : public jpeg_error_mgr {
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JPEGErrorManager()
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: jpeg_error_mgr()
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{
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jpeg_std_error(this);
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error_exit = errorExitCallBack;
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}
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jmp_buf jmp_buffer;
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static void errorExitCallBack(j_common_ptr cinfo)
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{
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auto *myerr = static_cast<JPEGErrorManager *>(cinfo->err);
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char buffer[JMSG_LENGTH_MAX];
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(*cinfo->err->format_message)(cinfo, buffer);
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qCWarning(GWENVIEW_LIB_LOG) << buffer;
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longjmp(myerr->jmp_buffer, 1);
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}
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};
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} // namespace
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#endif /* JPEGERRORMANAGER_H */
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