FreeCAD

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/***************************************************************************
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 *   Copyright (c) 2008 Werner Mayer <wmayer[at]users.sourceforge.net>     *
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 *                                                                         *
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 *   This file is part of the FreeCAD CAx development system.              *
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 *                                                                         *
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 *   This library is free software; you can redistribute it and/or         *
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 *   modify it under the terms of the GNU Library General Public           *
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 *   License as published by the Free Software Foundation; either          *
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 *   version 2 of the License, or (at your option) any later version.      *
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 *                                                                         *
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 *   This library  is distributed in the hope that it will be useful,      *
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 *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
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 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
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 *   GNU Library General Public License for more details.                  *
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 *                                                                         *
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 *   You should have received a copy of the GNU Library General Public     *
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 *   License along with this library; see the file COPYING.LIB. If not,    *
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 *   write to the Free Software Foundation, Inc., 59 Temple Place,         *
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 *   Suite 330, Boston, MA  02111-1307, USA                                *
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 *                                                                         *
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 ***************************************************************************/
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#include "PreCompiled.h"
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#ifndef _PreComp_
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# include <QApplication>
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# include <QBuffer>
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# include <QByteArray>
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# include <QDateTime>
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# include <QImage>
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# include <QThread>
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#endif
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#include <App/Application.h>
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#include <Base/Reader.h>
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#include <Base/Writer.h>
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#include "Thumbnail.h"
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#include "BitmapFactory.h"
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#include "View3DInventorViewer.h"
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using namespace Gui;
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Thumbnail::Thumbnail(int s) : size(s)
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{
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}
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Thumbnail::~Thumbnail() = default;
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void Thumbnail::setViewer(View3DInventorViewer* v)
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{
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    this->viewer = v;
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}
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void Thumbnail::setSize(int s)
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{
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    this->size = s;
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}
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void Thumbnail::setFileName(const char* fn)
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{
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    this->uri = QUrl::fromLocalFile(QString::fromUtf8(fn));
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}
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unsigned int Thumbnail::getMemSize () const
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{
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    return 0;
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}
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void Thumbnail::Save (Base::Writer &writer) const
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{
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    // It's only possible to add extra information if force of XML is disabled
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    if (!writer.isForceXML())
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        writer.addFile("thumbnails/Thumbnail.png", this);
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}
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void Thumbnail::Restore(Base::XMLReader &reader)
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{
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    Q_UNUSED(reader);
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    //reader.addFile("Thumbnail.png",this);
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}
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void Thumbnail::SaveDocFile (Base::Writer &writer) const
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{
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    if (!this->viewer)
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        return;
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    QImage img;
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    if (this->viewer->thread() != QThread::currentThread()) {
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        qWarning("Cannot create a thumbnail from non-GUI thread");
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        return;
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    }
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    QColor invalid;
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    this->viewer->imageFromFramebuffer(this->size, this->size, 4, invalid, img);
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    // Get app icon and resize to half size to insert in topbottom position over the current view snapshot
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    QPixmap appIcon = Gui::BitmapFactory().pixmap(App::Application::Config()["AppIcon"].c_str());
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    QPixmap px =  appIcon;
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    if (!img.isNull()) {
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        // Create a small "Fc" Application icon in the bottom right of the thumbnail
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        if (App::GetApplication().GetParameterGroupByPath
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            ("User parameter:BaseApp/Preferences/Document")->GetBool("AddThumbnailLogo",true)) {
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            // only scale app icon if an offscreen image could be created
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            appIcon = appIcon.scaled(this->size / 4, this->size /4, Qt::KeepAspectRatio, Qt::SmoothTransformation);
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            px = BitmapFactory().merge(QPixmap::fromImage(img), appIcon, BitmapFactoryInst::BottomRight);
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        }
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        else {
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            px = QPixmap::fromImage(img);
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        }
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    }
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    if (!px.isNull()) {
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        // according to specification add some meta-information to the image
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        qint64 mt = QDateTime::currentDateTimeUtc().toSecsSinceEpoch();
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        QString mtime = QString::fromLatin1("%1").arg(mt);
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        img.setText(QLatin1String("Software"), qApp->applicationName());
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        img.setText(QLatin1String("Thumb::Mimetype"), QLatin1String("application/x-extension-fcstd"));
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        img.setText(QLatin1String("Thumb::MTime"), mtime);
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        img.setText(QLatin1String("Thumb::URI"), this->uri.toString());
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        QByteArray ba;
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        QBuffer buffer(&ba);
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        buffer.open(QIODevice::WriteOnly);
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        px.save(&buffer, "PNG");
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        writer.Stream().write(ba.constData(), ba.length());
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    }
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}
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void Thumbnail::RestoreDocFile(Base::Reader &reader)
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{
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    Q_UNUSED(reader);
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}
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