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/* ============================================================
*
* This file is a part of digiKam project
* http://www.digikam.org
*
* Date : 2006-18-03
* Description : Superimpose filter.
*
* Copyright (C) 2006-2008 by Marcel Wiesweg <marcel dot wiesweg at gmx dot 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;
* either version 2, 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.
*
* ============================================================ */
// Local includes.
#include "superimpose.h"
namespace DigikamSuperImposeImagesPlugin
{
SuperImpose::SuperImpose(Digikam::DImg *orgImage, Digikam::DImg *templ,
TQRect orgImageSelection,
Digikam::DColorComposer::CompositingOperation compositeRule)
{
m_orgImage = *orgImage;
m_template = *templ;
m_selection = orgImageSelection;
m_compositeRule = compositeRule;
filterImage();
}
void SuperImpose::filterImage(void)
{
if (m_template.isNull())
return;
int templateWidth = m_template.width();
int templateHeight = m_template.height();
// take selection of src image and scale it to size of template
m_destImage = m_orgImage.smoothScaleSection(m_selection.x(), m_selection.y(),
m_selection.width(), m_selection.height(), templateWidth, templateHeight);
// convert depth if necessary
m_template.convertToDepthOfImage(&m_destImage);
// get composer for compositing rule
Digikam::DColorComposer *composer = Digikam::DColorComposer::getComposer(m_compositeRule);
Digikam::DColorComposer::MultiplicationFlags flags = Digikam::DColorComposer::NoMultiplication;
if (m_compositeRule != Digikam::DColorComposer::PorterDuffNone)
flags = Digikam::DColorComposer::MultiplicationFlagsDImg;
// do alpha blending of template on dest image
m_destImage.bitBlendImage(composer, &m_template, 0, 0, templateWidth, templateHeight, 0, 0, flags);
delete composer;
}
} // namespace DigikamSuperImposeImagesPlugin
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