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171 lines
5.0 KiB
171 lines
5.0 KiB
/*
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* Copyright (C) 2013 Open Education Foundation
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*
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* Copyright (C) 2010-2013 Groupement d'Intérêt Public pour
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* l'Education Numérique en Afrique (GIP ENA)
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*
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* This file is part of OpenBoard.
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*
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* OpenBoard is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, version 3 of the License,
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* with a specific linking exception for the OpenSSL project's
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* "OpenSSL" library (or with modified versions of it that use the
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* same license as the "OpenSSL" library).
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*
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* OpenBoard 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 General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with OpenBoard. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "UBThumbnailAdaptor.h"
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#include <QtCore>
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#include "frameworks/UBFileSystemUtils.h"
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#include "core/UBPersistenceManager.h"
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#include "core/UBApplication.h"
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#include "core/UBSettings.h"
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#include "board/UBBoardController.h"
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#include "board/UBBoardPaletteManager.h"
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#include "document/UBDocumentProxy.h"
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#include "domain/UBGraphicsScene.h"
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#include "UBSvgSubsetAdaptor.h"
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#include "core/memcheck.h"
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void UBThumbnailAdaptor::generateMissingThumbnails(UBDocumentProxy* proxy)
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{
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int existingPageCount = proxy->pageCount();
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for (int iPageNo = 0; iPageNo < existingPageCount; ++iPageNo)
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{
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QString thumbFileName = proxy->persistencePath() + UBFileSystemUtils::digitFileFormat("/page%1.thumbnail.jpg", iPageNo);
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QFile thumbFile(thumbFileName);
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if (!thumbFile.exists())
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{
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bool displayMessage = (existingPageCount > 5);
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int thumbCount = 0;
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UBGraphicsScene* scene = UBSvgSubsetAdaptor::loadScene(proxy, iPageNo);
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if (scene)
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{
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thumbCount++;
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if (displayMessage && thumbCount == 1)
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UBApplication::showMessage(tr("Generating preview thumbnails ..."));
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persistScene(proxy, scene, iPageNo);
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}
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if (displayMessage && thumbCount > 0)
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UBApplication::showMessage(tr("%1 thumbnails generated ...").arg(thumbCount));
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}
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}
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}
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const QPixmap* UBThumbnailAdaptor::get(UBDocumentProxy* proxy, int pageIndex)
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{
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QString fileName = proxy->persistencePath() + UBFileSystemUtils::digitFileFormat("/page%1.thumbnail.jpg", pageIndex);
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QFile file(fileName);
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if (!file.exists())
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{
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generateMissingThumbnails(proxy);
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}
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QPixmap* pix = new QPixmap();
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if (file.exists())
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{
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//Warning. Works only with modified Qt
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#ifdef Q_WS_X11
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pix->load(fileName, 0, Qt::AutoColor);
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#else
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pix->load(fileName, 0, Qt::AutoColor, false);
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#endif
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}
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return pix;
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}
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void UBThumbnailAdaptor::load(UBDocumentProxy* proxy, QList<const QPixmap*>& list)
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{
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generateMissingThumbnails(proxy);
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foreach(const QPixmap* pm, list){
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delete pm;
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pm = NULL;
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}
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list.clear();
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for(int i=0; i<proxy->pageCount(); i++)
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list.append(get(proxy, i));
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}
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void UBThumbnailAdaptor::persistScene(UBDocumentProxy* proxy, UBGraphicsScene* pScene, int pageIndex, bool overrideModified)
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{
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QString fileName = proxy->persistencePath() + UBFileSystemUtils::digitFileFormat("/page%1.thumbnail.jpg", pageIndex);
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QFile thumbFile(fileName);
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if (pScene->isModified() || overrideModified || !thumbFile.exists())
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{
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qreal nominalWidth = pScene->nominalSize().width();
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qreal nominalHeight = pScene->nominalSize().height();
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qreal ratio = nominalWidth / nominalHeight;
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QRectF sceneRect = pScene->normalizedSceneRect(ratio);
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qreal width = UBSettings::maxThumbnailWidth;
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qreal height = width / ratio;
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QImage thumb(width, height, QImage::Format_ARGB32);
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QRectF imageRect(0, 0, width, height);
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QPainter painter(&thumb);
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painter.setRenderHint(QPainter::Antialiasing, true);
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painter.setRenderHint(QPainter::SmoothPixmapTransform, true);
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if (pScene->isDarkBackground())
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{
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painter.fillRect(imageRect, Qt::black);
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}
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else
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{
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painter.fillRect(imageRect, Qt::white);
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}
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pScene->setRenderingContext(UBGraphicsScene::NonScreen);
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pScene->setRenderingQuality(UBItem::RenderingQualityHigh);
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pScene->render(&painter, imageRect, sceneRect, Qt::KeepAspectRatio);
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pScene->setRenderingContext(UBGraphicsScene::Screen);
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pScene->setRenderingQuality(UBItem::RenderingQualityNormal);
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thumb.scaled(width, height, Qt::KeepAspectRatio, Qt::SmoothTransformation).save(fileName, "JPG");
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}
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}
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QUrl UBThumbnailAdaptor::thumbnailUrl(UBDocumentProxy* proxy, int pageIndex)
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{
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QString fileName = proxy->persistencePath() + UBFileSystemUtils::digitFileFormat("/page%1.thumbnail.jpg", pageIndex);
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return QUrl::fromLocalFile(fileName);
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}
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