karbon/png/pngexport.cpp

/* This file is part of the KDE project
   Copyright (C) 2002, The Karbon Developers
 
   This library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Library General Public
   License as published by the Free Software Foundation; either
   version 2 of the License, or (at your option) any later version.
 
   This library 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
   Library General Public License for more details.
 
   You should have received a copy of the GNU Library General Public License
   along with this library; see the file COPYING.LIB.  If not, write to
   the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
*/
 
#include <tqcstring.h>
#include <tqdom.h>
#include <tqfile.h>
#include <tqstring.h>
#include <tqvaluelist.h>
#include <tqimage.h>
 
#include <kgenericfactory.h>
#include <KoFilter.h>
#include <KoFilterChain.h>
#include <KoStore.h>
 
#include "pngexport.h"
#include "vdocument.h"
#include "vselection.h"
#include "vkopainter.h"
#include "vlayer.h"
#include "vcomputeboundingbox.h"
 
#include <kdebug.h>
 
 
typedef KGenericFactory<PngExport, KoFilter> PngExportFactory;
K_EXPORT_COMPONENT_FACTORY( libkarbonpngexport, PngExportFactory( "kofficefilters" ) )
 
 
PngExport::PngExport( KoFilter*, const char*, const TQStringList& )
    : KoFilter()
{
}
 
KoFilter::ConversionStatus
PngExport::convert( const TQCString& from, const TQCString& to )
{
    if ( to != "image/png" || from != "application/x-karbon" )
    {
        return KoFilter::NotImplemented;
    }
 
    KoStoreDevice* storeIn = m_chain->storageFile( "root", KoStore::Read );
    if( !storeIn )
        return KoFilter::StupidError;
 
    TQDomDocument domIn;
    domIn.setContent( storeIn );
    TQDomElement docNode = domIn.documentElement();
 
    // load the document and export it:
    VDocument doc;
    doc.load( docNode );
 
    // calculate the documents bounding box
    VComputeBoundingBox bbox( true );
    doc.accept( bbox );
    const KoRect &rect = bbox.boundingRect();
 
    // create image with correct width and height
    TQImage img( int( rect.width() ), int( rect.height() ), 32 );
    //img.setAlphaBuffer( true );
 
    // Create painter and set up objects to draw
    VKoPainter p( img.bits(), rect.width(), rect.height() );
    p.clear( tqRgba( 0xFF, 0xFF, 0xFF, 0xFF ) );
    p.setWorldMatrix( TQWMatrix().translate( -rect.x(), -rect.y() ) );
 
    doc.draw( &p, &rect );
 
    TQImage image = img.swapRGB();
    TQImage mirrored = image.mirror( false, true );
    // save png
    mirrored.save( m_chain->outputFile(), "PNG" );
 
    return KoFilter::OK;
}
 
#include "pngexport.moc"