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1 // Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies). |
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2 // All rights reserved. |
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3 // This component and the accompanying materials are made available |
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4 // under the terms of "Eclipse Public License v1.0" |
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5 // which accompanies this distribution, and is available |
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6 // at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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7 // |
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8 // Initial Contributors: |
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9 // Nokia Corporation - initial contribution. |
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10 // |
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11 // Contributors: |
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12 // |
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13 // Description: |
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14 // |
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15 |
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16 /** |
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17 @file |
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18 @publishedAll |
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19 @released |
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20 */ |
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21 |
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22 #ifndef __IMAGE_PROCESSOR_PREVIEW_H__ |
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23 #define __IMAGE_PROCESSOR_PREVIEW_H__ |
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24 |
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25 #include <e32base.h> |
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26 #include <gdi.h> |
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27 #include <imageframe.h> |
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28 |
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29 class CFbsBitmap; |
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30 class CImageFrame; |
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31 |
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32 namespace ImageProcessor |
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33 { |
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34 |
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35 class CImageProcessorImpl; |
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36 |
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37 namespace Plugin |
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38 { |
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39 class MPreview; |
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40 } |
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41 |
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42 /** |
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43 A preview representation of the rendered image after effects and geometric operations have been applied. Has the ability to zoom and pan the output image in the |
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44 supplied pixel buffer. Typically this is a low resolution representation of the image which allows effects and operations |
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45 to be applied quickly to the image without needing to process the whole image. |
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46 |
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47 @publishedAll |
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48 @released |
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49 */ |
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50 class TPreview |
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51 { |
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52 public: |
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53 /** |
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54 The state of the preview screen |
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55 */ |
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56 enum TState |
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57 { |
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58 /** State means the preview has not been initialized, need to call InitializeL() to initialize*/ |
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59 EUninitialized, |
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60 /** State means the preview is being initialized by async call of InitializeL()*/ |
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61 EInitializing, |
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62 /** State means the initialize process has finished and preview is available to be rendered*/ |
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63 EInitialized, |
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64 /** State means the preview is being rendered by async call of RenderL()*/ |
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65 ERendering, |
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66 |
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67 /** Count of valid preview states (boundary marker - not a true state). */ |
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68 EStatesCount |
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69 }; |
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70 |
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71 public: |
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72 IMPORT_C void SupportedImageFrameFormatsL(RArray<TUid>& aFormats) const; |
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73 IMPORT_C void SupportedOutputDisplayModesL(RArray<TDisplayMode>& aDisplayModes) const; |
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74 |
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75 IMPORT_C void SetOutputL(CFbsBitmap& aBitmap); |
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76 IMPORT_C void SetOutputL(CImageFrame& aPixelBuffer); |
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77 |
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78 IMPORT_C CImageFrame* CreateOutputL(const TSize &aFrameSize, const TFrameFormatBase &aFrameFormat, const TFrameLayoutBase &aFrameLayout); |
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79 |
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80 IMPORT_C void InitializeL(); |
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81 IMPORT_C void UninitializeL(); |
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82 |
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83 IMPORT_C void RenderL(); |
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84 IMPORT_C void ResetL(); |
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85 IMPORT_C void Cancel(); |
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86 |
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87 IMPORT_C void SetZoomL(TReal32 aZoom); |
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88 IMPORT_C void SetPanL(TReal32 aPanX, TReal32 aPanY); |
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89 IMPORT_C void SetPreviewId(TInt aPreviewId); |
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90 IMPORT_C void GetZoomLevelSettings(TReal32& aMinimumLevel, TReal32& aMaximumLevel); |
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91 IMPORT_C void GetPanLevelSettings(TReal32& aMinimumLevel, TReal32& aMaximumLevel); |
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92 |
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93 IMPORT_C TReal32 ZoomL() const; |
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94 IMPORT_C void PanL(TReal32& aPanX, TReal32& aPanY) const; |
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95 IMPORT_C TSize SizeL() const; |
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96 IMPORT_C TRect CanvasAreaL() const; |
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97 IMPORT_C TInt PreviewId() const; |
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98 |
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99 IMPORT_C void PreviewToCurrentCoordL(const TPoint& aPreviewPoint, TPoint& aCurrentPoint) const; |
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100 IMPORT_C void CanvasToCurrentCoordL(const TPoint& aCanvasPoint, TPoint& aCurrentPoint) const; |
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101 |
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102 IMPORT_C TPreview::TState State() const; |
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103 |
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104 private: |
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105 friend class CImageProcessorImpl; |
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106 CImageProcessorImpl& iImageProcessorImpl; |
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107 TPreview(Plugin::MPreview& aPreviewImpl, CImageProcessorImpl& aImageProcessorImpl); |
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108 |
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109 void SetStateL(TPreview::TState aState); |
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110 |
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111 static const TBool iValidStates[TPreview::EStatesCount][TPreview::EStatesCount]; |
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112 Plugin::MPreview& iPreviewImpl; |
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113 |
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114 TPreview::TState iState; |
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115 TBool iIsOutputSet; |
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116 TInt iReserved; // future proof |
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117 }; |
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118 |
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119 } //namespace ImageProcessor |
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120 |
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121 #endif //__IMAGE_PROCESSOR_PREVIEW_H__ |