|
1 /* |
|
2 * Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies). |
|
3 * All rights reserved. |
|
4 * This component and the accompanying materials are made available |
|
5 * under the terms of "Eclipse Public License v1.0" |
|
6 * which accompanies this distribution, and is available |
|
7 * at the URL "http://www.eclipse.org/legal/epl-v10.html". |
|
8 * |
|
9 * Initial Contributors: |
|
10 * Nokia Corporation - initial contribution. |
|
11 * |
|
12 * Contributors: |
|
13 * |
|
14 * Description: Texture Manager component/Decodes the Image in step for large images |
|
15 * |
|
16 */ |
|
17 |
|
18 |
|
19 |
|
20 |
|
21 #ifndef C_GLXBITMAPDECODERWRAPPER_H |
|
22 #define C_GLXBITMAPDECODERWRAPPER_H |
|
23 |
|
24 // INCLUDE FILES |
|
25 #include<alf/alftimedvalue.h> |
|
26 #include <IclExtJpegApi.h> // For CExtJpegDecoder |
|
27 |
|
28 /** |
|
29 * Observer interface used to be notified when texture bitmap is completed. |
|
30 */ |
|
31 NONSHARABLE_CLASS( MGlxBitmapDecoderObserver ) |
|
32 { |
|
33 public: |
|
34 /** |
|
35 * Called when the content of the texture is changed. |
|
36 * @param aHasContent Whether the texture now has content. |
|
37 */ |
|
38 virtual void HandleBitmapDecodedL(TInt aThumbnailIndex,CFbsBitmap* aBitmap) = 0; |
|
39 }; |
|
40 /** |
|
41 * This class does the decoding of the images in steps depending on the size of the images . |
|
42 * this is a wrapper class, doesn't actually decode the images. |
|
43 */ |
|
44 |
|
45 class CGlxBitmapDecoderWrapper: public CActive |
|
46 { |
|
47 public: |
|
48 /*This Enums specifies the state of the Decoding*/ |
|
49 enum TDecoderState |
|
50 { |
|
51 ESTate0, ESTate1,ESTateFinal |
|
52 }; |
|
53 /*This Enums specifies the size of the images*/ |
|
54 enum TImageLevel |
|
55 { |
|
56 ELevel0, ELevel1,ELevel2 |
|
57 }; |
|
58 /** |
|
59 * Two-phased constructor |
|
60 * @param aObserver:The Observer contains the CGlxTextureManagerImpl Object |
|
61 * @return Constructed object |
|
62 */ |
|
63 static CGlxBitmapDecoderWrapper* NewL(MGlxBitmapDecoderObserver* aObserver); |
|
64 |
|
65 /** |
|
66 * Destructor |
|
67 */ |
|
68 ~CGlxBitmapDecoderWrapper(); |
|
69 |
|
70 /** |
|
71 * intiates the Decoding the Image and updates the no:of steps to decode |
|
72 * @param aSourceFileName :contains the file name |
|
73 * @param aindex:contains the index value |
|
74 */ |
|
75 void DoDecodeImageL(const TDesC & aSourceFileName,TInt aIndex); |
|
76 |
|
77 /** |
|
78 * starts the decoding and updates the state of the decoding |
|
79 */ |
|
80 void DecodeImageL(); |
|
81 /** |
|
82 * Request free memory with Out of Memory Monitor |
|
83 * @param aBytesRequested : Request for free memory in Bytes |
|
84 */ |
|
85 TInt OOMRequestFreeMemoryL( TInt aBytesRequested); |
|
86 |
|
87 public: |
|
88 /** |
|
89 * Standard Active object functions |
|
90 */ |
|
91 virtual void RunL(); |
|
92 virtual void DoCancel(); |
|
93 |
|
94 private: |
|
95 /** |
|
96 * Constructor |
|
97 */ |
|
98 CGlxBitmapDecoderWrapper(); |
|
99 |
|
100 /** |
|
101 * Second-phase constuction |
|
102 */ |
|
103 void ConstructL(MGlxBitmapDecoderObserver* aObserver); |
|
104 |
|
105 /** |
|
106 * If the image format is non jpeg, then we need to calculate as per |
|
107 * reduction factor and reduced size as what the decoder is going to return us |
|
108 * This function returns if that needs to be done. |
|
109 */ |
|
110 TBool DoesMimeTypeNeedsRecalculateL(); |
|
111 |
|
112 /** |
|
113 * Recalculate the size for png/bmp as decoder fails to |
|
114 * decode for desired size |
|
115 */ |
|
116 TSize ReCalculateSizeL(); |
|
117 |
|
118 private: |
|
119 /* Contains the TextureManagerImpl object,calls the HandleBitmapDecoded*/ |
|
120 MGlxBitmapDecoderObserver* iObserver; |
|
121 /*Specifies the Decoder */ |
|
122 CImageDecoder* iImageDecoder; // decoder from ICL API |
|
123 /*Contains the Thumbnail Index*/ |
|
124 TInt iThumbnailIndex; |
|
125 /*Contains the Bitmap generated*/ |
|
126 CFbsBitmap* iBitmap; |
|
127 /*contains the original size of the image*/ |
|
128 TAlfRealSize iOriginalSize; |
|
129 /*A handle to a file server session.*/ |
|
130 RFs iFs; |
|
131 /*To store the target image size*/ |
|
132 TSize iTargetBitmapSize; |
|
133 /*To store the image uri path*/ |
|
134 HBufC* iImagePath; |
|
135 #ifdef _DEBUG |
|
136 TTime iStartTime; |
|
137 TTime iStopTime; |
|
138 #endif |
|
139 }; |
|
140 |
|
141 #endif //C_GLXBITMAPDECODERWRAPPER_H |