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1 /* |
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2 * Copyright (c) 2004-2006 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: Interface used for scaling images to certain size. |
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15 * |
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16 */ |
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17 |
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18 |
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19 |
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20 #ifndef VTENGIMAGESCALER_H |
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21 #define VTENGIMAGESCALER_H |
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22 |
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23 // INCLUDES |
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24 #include <gdi.h> |
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25 |
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26 // FORWARD DECLARATIONS |
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27 class CFbsBitmap; |
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28 |
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29 /** |
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30 * Image scaler observer. |
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31 * |
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32 * @lib videoteleng.lib |
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33 * @since Series 60 2.8 |
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34 */ |
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35 class MVtEngScalerObserver |
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36 { |
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37 public: |
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38 |
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39 /** |
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40 * Called when scaling is ready. |
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41 * @param aBitmap a scaled bitmap |
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42 * @param aError Symbian OS error code |
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43 */ |
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44 virtual void ScalingCompleted( |
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45 CFbsBitmap* aBitmap, |
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46 TInt aError ) = 0; |
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47 }; |
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48 |
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49 /** |
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50 * Image scaler. |
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51 * |
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52 * @lib videoteleng |
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53 * @since 2.6 |
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54 */ |
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55 class MVtEngImageScaler |
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56 { |
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57 public: // new functions |
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58 |
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59 /** |
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60 * Used to start the scaling of an image. |
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61 * @param aSourceIndex the index of the source to use. |
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62 */ |
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63 virtual void ScaleL( |
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64 TInt aSourceIndex ) = 0; |
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65 |
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66 /** |
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67 * Configures the scaler. |
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68 * @param aDisplayMode which kind of display |
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69 * @param aSize the width and height of the display |
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70 * @return ETrue if previous scaling was cancelled |
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71 */ |
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72 virtual TBool ConfigureL( |
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73 TDisplayMode aDisplayMode, |
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74 TSize aSize, |
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75 TInt aSourceHandle1, |
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76 TInt aSourceHandle2 ) = 0; |
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77 |
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78 /** |
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79 * Deletes the scaling object. |
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80 */ |
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81 virtual void Release() = 0; |
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82 |
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83 /** |
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84 * Possibility to cancel the scaling. |
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85 * @return error code of canceling. |
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86 */ |
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87 virtual TInt Cancel() = 0; |
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88 }; |
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89 |
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90 /** |
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91 * Image scaler factory. |
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92 * |
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93 * @lib videoteleng.lib |
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94 * @since Series 60 2.8 |
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95 */ |
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96 class VtEngScalerFactory |
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97 { |
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98 public: |
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99 /** |
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100 * Factory method for creating scaler |
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101 * @param aObserver a callback interface |
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102 */ |
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103 static MVtEngImageScaler* CreateScalerL( |
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104 MVtEngScalerObserver& aObserver ); |
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105 }; |
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106 |
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107 #endif // VTENGIMAGESCALER_H |
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108 |
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109 // End of File |