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/* This file is part of the Calligra project.
Copyright 2015 Friedrich W. H. Kossebau <kossebau@kde.org>
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 "kritacreator.h"
#include <kzip.h>
// Qt
#include <QPainter>
#include <QImage>
#include <QIODevice>
#include <QFile>
extern "C"
{
Q_DECL_EXPORT ThumbCreator *new_creator()
{
return new KritaCreator;
}
}
KritaCreator::KritaCreator()
{
}
KritaCreator::~KritaCreator()
{
}
bool KritaCreator::create(const QString &path, int width, int height, QImage &image)
{
// for now just rely on the rendered data inside the file,
// do not load Krita code for rendering ourselves, as that currently (2.9)
// means loading all plugins, resources etc.
KZip zip(path);
if (!zip.open(QIODevice::ReadOnly)) {
return false;
}
QImage thumbnail;
bool biggerSizeNeeded = true;
// first check if normal thumbnail is good enough
// ORA thumbnail?
const KArchiveEntry *entry = zip.directory()->entry(QLatin1String("Thumbnails/thumbnail.png"));
// KRA thumbnail
if (!entry || !entry->isFile()) {
entry = zip.directory()->entry(QLatin1String("preview.png"));
}
if (!entry || !entry->isFile()) {
return false;
}
const KZipFileEntry* fileZipEntry = static_cast<const KZipFileEntry*>(entry);
bool thumbLoaded = thumbnail.loadFromData(fileZipEntry->data(), "PNG");
if (thumbLoaded) {
biggerSizeNeeded = (thumbnail.width() < width || thumbnail.height() < height);
}
if (biggerSizeNeeded || !thumbLoaded) {
entry = zip.directory()->entry(QLatin1String("mergedimage.png"));
}
if (entry && entry->isFile()) {
fileZipEntry = static_cast<const KZipFileEntry*>(entry);
thumbLoaded = thumbnail.loadFromData(fileZipEntry->data(), "PNG");
if (thumbLoaded) {
thumbnail = thumbnail.scaled(width, height, Qt::KeepAspectRatio, Qt::SmoothTransformation);
} else {
return false;
}
}
if (!thumbnail.isNull()) {
// transparent areas put a white background behind the thumbnail
// (or better checkerboard?)
image = QImage(thumbnail.size(), QImage::Format_RGB32);
image.fill(QColor(Qt::white).rgb());
QPainter p(&image);
p.drawImage(QPoint(0, 0), thumbnail);
return true;
}
return false;
}
ThumbCreator::Flags KritaCreator::flags() const
{
return None;
}
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