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* Copyright (C) 2016 Canonical, Ltd.
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* This program 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.
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* This program 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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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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#include <QImageReader>
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#include <QQuickImageProvider>
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* This class accepts an id formulated like a URL. So you'd use something like:
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* source: "image://unity8imagecache/file:///usr/share/..."
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* Right now, we only support file:/// URLs. We do accept some flags though:
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* - This will use NAME as the cache lookup key instead of the provided URL.
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* We don't do any cleaning of old cached files yet. So you may want to always
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* provide a name to avoid leaving lots of files around.
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class ImageCache: public QQuickImageProvider
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QImage requestImage(const QString &id, QSize *size, const QSize &requestedSize) override;
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static QString imageCacheRoot();
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static QFileInfo imagePath(const QUrl &image);
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static bool needsUpdate(const QUrl &image, const QFileInfo &cachePath, const QSize &imageSize, const QSize &requestedSize, QSize &finalSize);
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static QSize calculateSize(const QSize &imageSize, const QSize &requestedSize);
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static QImage loadAndCacheImage(QImageReader &reader, const QFileInfo &cachePath, const QSize &finalSize);