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2024-06-29 11:52:32 +06:00
// vim: set tabstop=4 shiftwidth=4 expandtab
/*
Gwenview: an image viewer
Copyright 2007 Aurélien Gâteau <agateau@kde.org>
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 2
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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#ifndef JPEGERRORMANAGER_H
#define JPEGERRORMANAGER_H
#include <csetjmp>
extern "C" {
#define XMD_H
#include <jpeglib.h>
#undef const
}
namespace Gwenview
{
/**
* A simple error manager which overrides jpeg_error_mgr.error_exit to avoid
* calls to exit(). It uses setjmp, which I don't like, but I don't fill like
* introducing exceptions to the code base for now.
*
* In order to use it, give an instance of it to jpeg_decompress_struct.err,
* then call setjmp(errorManager.jmp_buffer)
*/
struct JPEGErrorManager : public jpeg_error_mgr {
JPEGErrorManager()
: jpeg_error_mgr()
{
jpeg_std_error(this);
error_exit = errorExitCallBack;
}
jmp_buf jmp_buffer;
static void errorExitCallBack(j_common_ptr cinfo)
{
auto *myerr = static_cast<JPEGErrorManager *>(cinfo->err);
char buffer[JMSG_LENGTH_MAX];
(*cinfo->err->format_message)(cinfo, buffer);
qCWarning(GWENVIEW_LIB_LOG) << buffer;
longjmp(myerr->jmp_buffer, 1);
}
};
} // namespace
#endif /* JPEGERRORMANAGER_H */