1 /* |
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2 * Copyright (c) 2004 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: Pure virtual interface to scaling processor |
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15 * : using MIHLBitmaps. |
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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 MIHLBITMAPPROCESSOR_H |
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21 #define MIHLBITMAPPROCESSOR_H |
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22 |
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23 // INCLUDES |
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24 #include <MIHLProcessor.h> |
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25 |
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26 // FORWARD DECLARATION |
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27 class MIHLBitmap; |
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28 class MIHFilter; |
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29 |
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30 // CLASS DECLARATION |
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31 /** |
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32 * MIHLBitmapProcessor |
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33 * |
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34 * Pure virtual interface to scaling processor using MIHLBitmaps. |
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35 * |
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36 * If interface needs to be pushed into CleanupStack, |
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37 * remember to use CleanupStackDeletePushL() function! |
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38 * DO NOT USE CleanupStack::PushL()!! |
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39 * |
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40 * @lib IHL.lib |
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41 * @since 3.0 |
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42 */ |
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43 class MIHLBitmapProcessor : public MIHLProcessor |
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44 { |
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45 public: |
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46 |
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47 /** |
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48 * Virtual destructor. |
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49 */ |
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50 virtual ~MIHLBitmapProcessor() {} |
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51 |
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52 public: |
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53 |
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54 /** |
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55 * Flags to control scaler functionality. |
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56 * These can be combined using an OR operation. |
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57 * @since 3.0 |
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58 */ |
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59 enum TOptions |
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60 { |
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61 EOptionUseBilinearInterpolation = 0x01, |
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62 }; |
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63 |
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64 public: |
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65 |
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66 /** |
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67 * Process rectangle from source bitmap to a rectangle |
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68 * in destination bitmap. Scaled area can be also |
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69 * rotated and/or mirrored during process. |
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70 * See full description from MIHLScaler header. |
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71 * @since 3.0 |
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72 * @param aStatus Process request status reference. |
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73 * @param aSrcBitmap Source bitmap reference. |
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74 * @param aSrcRect Rectangle that is processed from source bitmap. |
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75 * @param aDstBitmap Destination bitmap reference. |
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76 * @param aDstRect Rectangle that is filled in destination bitmap. |
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77 * @return Return system wide error codes: |
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78 * KErrArgument - rectangles are outside of bitmap area. |
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79 * - source bitmap is empty (handle is null). |
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80 * - destination bitmap is empty (handle is null). |
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81 * - destination bitmap displaymode differs |
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82 * from source bitmap displaymode. |
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83 * KErrBusy - processor has request pending already. |
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84 */ |
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85 virtual TInt Process( TRequestStatus& aStatus, |
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86 const MIHLBitmap& aSrcBitmap, |
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87 const TRect& aSrcRect, |
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88 MIHLBitmap& aDstBitmap, |
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89 const TRect& aDstRect ) = 0; |
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90 |
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91 /** |
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92 * Check if processor has request pending. |
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93 * @since 3.0 |
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94 * @return ETrue if request is pending, EFalse if not. |
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95 */ |
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96 virtual TBool IsBusy() const = 0; |
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97 |
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98 /** |
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99 * Cancel pending request. |
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100 * If not active, method does nothing. |
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101 * @since 3.0 |
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102 */ |
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103 virtual void CancelProcess() = 0; |
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104 |
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105 /** |
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106 * Set filter. |
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107 * For future use, not used currently! |
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108 * @since 3.0 |
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109 */ |
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110 virtual void SetFilter( MIHFilter* aFilter ) = 0; |
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111 }; |
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112 |
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113 #endif // MIHLBITMAPPROCESSOR_H |
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114 |
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115 // End of File |
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