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/* This file is part of the KDE project
* Copyright (C) 2003 Volker Krause <volker.krause@rwth-aachen.de>
*
* 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 version 2.
*
* 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; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
#include "kfile_pnm.h"
#include <math.h>
#include <kgenericfactory.h>
#include <tqfile.h>
#include <tqtextstream.h>
static const char* formats[] = {
I18N_NOOP("plain"),
I18N_NOOP("raw")
};
typedef KGenericFactory<KPnmPlugin> PnmFactory;
K_EXPORT_COMPONENT_FACTORY(kfile_pnm, PnmFactory("kfile_pnm"))
KPnmPlugin::KPnmPlugin(TQObject *parent, const char *name, const TQStringList &args) : KFilePlugin(parent, name, args)
{
makeMimeTypeInfo( "image/x-portable-bitmap" );
makeMimeTypeInfo( "image/x-portable-greymap" );
makeMimeTypeInfo( "image/x-portable-pixmap" );
}
void KPnmPlugin::makeMimeTypeInfo(const TQString& mimetype)
{
KFileMimeTypeInfo* info = addMimeTypeInfo( mimetype );
KFileMimeTypeInfo::GroupInfo* group = 0;
KFileMimeTypeInfo::ItemInfo* item = 0;
group = addGroupInfo(info, "General", i18n("General"));
addItemInfo(group, "Format", i18n("Format"), TQVariant::String);
item = addItemInfo(group, "Dimensions", i18n("Dimensions"), TQVariant::Size);
setUnit(item, KFileMimeTypeInfo::Pixels);
item = addItemInfo(group, "BitDepth", i18n("Bit Depth"), TQVariant::Int);
setUnit(item, KFileMimeTypeInfo::BitsPerPixel);
addItemInfo(group, "Comment", i18n("Comment"), TQVariant::String);
}
bool KPnmPlugin::readInfo( KFileMetaInfo& info, uint /*what*/)
{
TQFile f(info.path());
if(!f.open(IO_ReadOnly))
return false;
if(f.size() <= 2)
return false;
TQTextStream stream(&f);
char c;
stream >> c;
if(c != 'P')
return false;
// image format and type
int n;
stream >> n;
int format = (n - 1) / 3;
if(format != 0 && format != 1)
return false;
int type = (n - 1) % 3;
TQString comments, buffer;
while(!stream.atEnd()) {
stream >> c;
// comment
if( c == '#') {
buffer = stream.readLine();
comments += buffer.stripWhiteSpace();
comments += '\n';
}
// image size
// unfortunately TQt doesn't have some kind of push-back method for
// TQTextStream, so we need to manually decode the first part of the
// image size.
if( c >= '0' && c <= '9' ) {
buffer = "";
TQChar tmp(c);
while(!stream.atEnd() && tmp.isDigit()) {
buffer += tmp;
stream >> tmp;
}
break;
}
}
// image size
int x, y, max;
x = buffer.toInt();
stream >> y;
stream >> max;
// bit depth
// PNM doesn't provide a conventional bit depth value, only the highest value
// per pixel. To have comparable values with other formats, we convert it to
// a normal bit depth value.
int bpp = 1;
if(type != 0)
bpp = (int)ceil(log((double)max) / log(2.0));
if(type == 2)
bpp *= 3;
KFileMetaInfoGroup group = appendGroup(info, "General");
appendItem(group, "Format", formats[format]);
appendItem(group, "Dimensions", TQSize(x, y));
if(!comments.isEmpty())
appendItem(group, "Comment", comments.stripWhiteSpace());
appendItem(group, "BitDepth", bpp);
f.close();
return true;
}
#include "kfile_pnm.moc"
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