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// vim: set tabstop=4 shiftwidth=4 noexpandtab
/*
Gwenview - A simple image viewer for KDE
Copyright 2000-2004 Aurélien Gâteau
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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifndef JPEGERRORMANAGER_H
#define JPEGERRORMANAGER_H
#include <setjmp.h>
extern "C" {
#define XMD_H
#include <jpeglib.h>
#undef const
}
namespace ImageUtils {
/**
* 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) {
JPEGErrorManager* myerr = static_cast<JPEGErrorManager*>(cinfo->err);
char buffer[JMSG_LENGTH_MAX];
(*cinfo->err->format_message)(cinfo, buffer);
kdWarning() << k_funcinfo << buffer << endl;
longjmp(myerr->jmp_buffer, 1);
}
};
} // namespace
#endif /* JPEGERRORMANAGER_H */
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