1 /* |
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2 * Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies). |
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3 * All rights reserved. |
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4 * This component and the accompanying materials are made available |
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5 * under the terms of "Eclipse Public License v1.0" |
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6 * which accompanies this distribution, and is available |
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7 * at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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8 * |
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9 * Initial Contributors: |
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10 * Nokia Corporation - initial contribution. |
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11 * |
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12 * Contributors: |
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13 * |
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14 * Description: Homescreen wallpaper helper class. |
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15 * |
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16 */ |
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17 |
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18 #include <QString> |
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19 #include <QImageReader> |
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20 |
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21 #include "hswallpaperhelper.h" |
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22 |
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23 |
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24 /*! |
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25 \class HsWallpaperHelper |
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26 \ingroup group_hsapplication |
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27 \brief Homescreen wallpaper helper class. |
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28 Implements image scaling and cropping services. |
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29 */ |
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30 |
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31 /*! |
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32 \internal |
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33 Scales and crops (if needed) \a sourcePath image using \a targetRect. |
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34 Centers target rect automatically if a\ centerTarget is true. |
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35 Pass empty a\ sourceRect to use full size source image as starting point. |
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36 Returns processed image or null image if operation fails. |
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37 */ |
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38 QImage HsWallpaperHelper::processImage(const QString &sourcePath, |
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39 const QRect &targetRect, |
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40 const QRect &sourceRect, |
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41 bool centerTarget) |
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42 { |
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43 QImageReader imageReader(sourcePath); |
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44 |
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45 QRect tempTargetRect = targetRect; |
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46 QRect tempSourceRect = sourceRect; |
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47 |
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48 if (imageReader.canRead()) { |
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49 QSize sourceSize = imageReader.size(); |
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50 if (tempSourceRect.isEmpty()) { |
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51 // If sourceRect not defined, uses full size image as source. |
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52 tempSourceRect.setRect(0, 0, sourceSize.width(), sourceSize.height()); |
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53 } |
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54 sourceSize.scale(tempTargetRect.width(), tempTargetRect.height(), |
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55 Qt::KeepAspectRatioByExpanding); |
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56 imageReader.setScaledSize(sourceSize); |
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57 |
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58 if (centerTarget) { |
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59 tempTargetRect.moveCenter(QPoint(sourceSize.width() / 2, sourceSize.height() / 2)); |
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60 } |
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61 imageReader.setScaledClipRect(tempTargetRect); |
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62 |
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63 return imageReader.read(); |
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64 } |
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65 return QImage(); // returns null QImage |
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66 } |
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