/*  This file is part of the KDE libraries

    SPDX-FileCopyrightText: 2006 Pascal Létourneau <pascal.letourneau@kdemail.net>

    SPDX-License-Identifier: LGPL-2.0-or-later

*/

#include "svgcreator.h"

#include <QImage>

#include <QPainter>

#include <QSvgRenderer>

#include <KPluginFactory>

K_PLUGIN_CLASS_WITH_JSON(SvgCreator, "svgthumbnail.json")

Unexecuted instantiation: svgthumbnail_factory::tr(char const*, char const*, int)

Unexecuted instantiation: svgthumbnail_factory::~svgthumbnail_factory()

SvgCreator::SvgCreator(QObject *parent, const QVariantList &args)

    : KIO::ThumbnailCreator(parent, args)

{

}

KIO::ThumbnailResult SvgCreator::create(const KIO::ThumbnailRequest &request)

{

    QSvgRenderer r(request.url().toLocalFile());

    if (!r.isValid())

        return KIO::ThumbnailResult::fail();

    // render using the correct ratio

    const QSize defaultSize = r.defaultSize();

    double ratio = 1.0;

    if (defaultSize.width() > 0 && defaultSize.height() > 0) {

        if (defaultSize.height() < request.targetSize().height() && defaultSize.width() < request.targetSize().width()) {

            // scale to output size if size is smaller than output

            ratio = 1.0 * defaultSize.height() / defaultSize.width();

        } else {

            ratio = static_cast<double>(defaultSize.height()) / static_cast<double>(defaultSize.width());

        }

    }

    int width = request.targetSize().width() * request.devicePixelRatio();

    int height = request.targetSize().height() * request.devicePixelRatio();

    if (defaultSize.height() > defaultSize.width()) {

        const double tmpHeight = width / ratio;

        if (tmpHeight <= std::numeric_limits<int>::max()) {

            height = qRound(tmpHeight);

        }

    } else {

        const double tmpWidth = height / ratio;

        if (tmpWidth <= std::numeric_limits<int>::max()) {

            width = qRound(tmpWidth);

        }

    }

    QImage i(width, height, QImage::Format_ARGB32_Premultiplied);

    i.fill(0);

    QPainter p(&i);

    r.render(&p, QRectF(QPointF(0, 0), QSizeF(width, height)));

    return KIO::ThumbnailResult::pass(i);

}

#include "moc_svgcreator.cpp"

#include "svgcreator.moc"