|
1 /* |
|
2 * Copyright (c) 2008-2008 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: Implementation of the utility class for asynchronously decoding the header thumbnail image |
|
15 * |
|
16 */ |
|
17 |
|
18 #include "ccappimagedecoding.h" |
|
19 #include <bitmaptransforms.h> |
|
20 #include <Pbk2PresentationUtils.h> |
|
21 #include <imageconversion.h> |
|
22 |
|
23 namespace{ |
|
24 |
|
25 const TInt KDelay = 500000; // 0.5s |
|
26 |
|
27 inline TSize ScaledLoadSize( const TSize& aOriginalSize, TInt aScaleFactor ) |
|
28 { |
|
29 // Divide original size with scalefactor |
|
30 // Round always up if result is not integer |
|
31 return TSize( aOriginalSize.iWidth / aScaleFactor + ( aOriginalSize.iWidth % aScaleFactor ? 1 : 0 ), |
|
32 aOriginalSize.iHeight / aScaleFactor + ( aOriginalSize.iHeight % aScaleFactor ? 1 : 0 ) ); |
|
33 } |
|
34 } // namespace |
|
35 |
|
36 // --------------------------------------------------------------------------- |
|
37 // Two-phase construction |
|
38 // --------------------------------------------------------------------------- |
|
39 // |
|
40 EXPORT_C CCCAppImageDecoding* CCCAppImageDecoding::NewL( |
|
41 MCCAppImageDecodingObserver& aObserver, |
|
42 RFs& aFs, |
|
43 HBufC8* aBitmapData, |
|
44 HBufC* aImageFile) |
|
45 { |
|
46 CCCAppImageDecoding* self = new (ELeave) CCCAppImageDecoding( |
|
47 aObserver, aFs, aBitmapData, aImageFile); |
|
48 CleanupStack::PushL(self); |
|
49 self->ConstructL(); |
|
50 CleanupStack::Pop(self); |
|
51 |
|
52 self->iBitmapData = aBitmapData; // take ownship |
|
53 self->iImageFullName = aImageFile; // take ownship |
|
54 |
|
55 return self; |
|
56 } |
|
57 |
|
58 // --------------------------------------------------------------------------- |
|
59 // First phase (C++) constructor |
|
60 // --------------------------------------------------------------------------- |
|
61 // |
|
62 inline CCCAppImageDecoding::CCCAppImageDecoding( |
|
63 MCCAppImageDecodingObserver& aObserver, |
|
64 RFs& aFs, |
|
65 HBufC8* aBitmapData, |
|
66 HBufC* aImageFile) : |
|
67 CActive( CActive::EPriorityStandard ), |
|
68 iObserver(aObserver), |
|
69 iFs(aFs) |
|
70 { |
|
71 CActiveScheduler::Add(this); |
|
72 } |
|
73 |
|
74 // --------------------------------------------------------------------------- |
|
75 // Second phase (C++) constructor |
|
76 // --------------------------------------------------------------------------- |
|
77 // |
|
78 inline void CCCAppImageDecoding::ConstructL() |
|
79 { |
|
80 User::LeaveIfError( iTimer.CreateLocal() ); |
|
81 } |
|
82 |
|
83 // --------------------------------------------------------------------------- |
|
84 // Destructor |
|
85 // --------------------------------------------------------------------------- |
|
86 // |
|
87 CCCAppImageDecoding::~CCCAppImageDecoding() |
|
88 { |
|
89 Cancel(); |
|
90 if (iImgDecoder) |
|
91 { |
|
92 iImgDecoder->Cancel(); |
|
93 delete iImgDecoder; |
|
94 } |
|
95 if (iBitmapScaler) |
|
96 { |
|
97 iBitmapScaler->Cancel(); |
|
98 delete iBitmapScaler; |
|
99 } |
|
100 delete iBitmap; |
|
101 delete iBitmapData; |
|
102 delete iImageFullName; |
|
103 iTimer.Close(); |
|
104 } |
|
105 |
|
106 // --------------------------------------------------------------------------- |
|
107 // Starts the decoding process |
|
108 // --------------------------------------------------------------------------- |
|
109 // |
|
110 EXPORT_C void CCCAppImageDecoding::StartL( const TSize& aImageSize ) |
|
111 { |
|
112 Cancel(); |
|
113 iDecoderState = ECcaConvertThumbnailImage; |
|
114 iBitmapSize = aImageSize; |
|
115 CreateBitmapL(); |
|
116 } |
|
117 |
|
118 // --------------------------------------------------------------------------- |
|
119 // Called by the active object framework when the decoding (request) is |
|
120 // completed. |
|
121 // --------------------------------------------------------------------------- |
|
122 // |
|
123 void CCCAppImageDecoding::RunL() |
|
124 { |
|
125 User::LeaveIfError( iStatus.Int() ); |
|
126 switch ( iDecoderState ) |
|
127 { |
|
128 case ECcaConvertThumbnailImage: |
|
129 { |
|
130 iDecoderState = ECcaScaleThumbnail; |
|
131 CropBitmapL(); |
|
132 ScaleBitmapL(); |
|
133 break; |
|
134 } |
|
135 |
|
136 case ECcaScaleThumbnail: |
|
137 { |
|
138 if ( iImageFullName ) |
|
139 { |
|
140 iDecoderState = ECcaReadImageFromFile; |
|
141 SetPriority( EPriorityIdle ); |
|
142 iTimer.After( iStatus, KDelay ); |
|
143 SetActive(); |
|
144 } |
|
145 // don't break here |
|
146 } |
|
147 |
|
148 case ECcaScaleImage: |
|
149 { |
|
150 // Ownership of the bitmap is transferred |
|
151 iObserver.BitmapReadyL( iBitmap ); |
|
152 iBitmap = NULL; |
|
153 delete iBitmapScaler; |
|
154 iBitmapScaler = NULL; |
|
155 delete iImgDecoder; |
|
156 iImgDecoder = NULL; |
|
157 break; |
|
158 } |
|
159 |
|
160 case ECcaReadImageFromFile: |
|
161 { |
|
162 if ( iImageFullName ) |
|
163 { |
|
164 iDecoderState = ECcaConvertImageFromFile; |
|
165 CreateBitmapL(); |
|
166 } |
|
167 break; |
|
168 } |
|
169 |
|
170 case ECcaConvertImageFromFile: |
|
171 { |
|
172 iDecoderState = ECcaScaleImage; |
|
173 SetPriority( EPriorityStandard ); |
|
174 CropBitmapL(); |
|
175 ScaleBitmapL(); |
|
176 break; |
|
177 } |
|
178 |
|
179 default: |
|
180 break; |
|
181 } |
|
182 } |
|
183 // --------------------------------------------------------------------------- |
|
184 // Called when the decoding (request) is cancelled for some reason. |
|
185 // --------------------------------------------------------------------------- |
|
186 // |
|
187 void CCCAppImageDecoding::DoCancel() |
|
188 { |
|
189 if (iImgDecoder) |
|
190 { |
|
191 iImgDecoder->Cancel(); |
|
192 delete iImgDecoder; |
|
193 iImgDecoder = NULL; |
|
194 } |
|
195 if ( iBitmapScaler ) |
|
196 { |
|
197 iBitmapScaler->Cancel(); |
|
198 delete iBitmapScaler; |
|
199 iBitmapScaler = NULL; |
|
200 } |
|
201 iTimer.Cancel(); |
|
202 } |
|
203 |
|
204 void CCCAppImageDecoding::CropBitmapL() |
|
205 { |
|
206 TSize dummy; |
|
207 Pbk2PresentationImageUtils::CropImageL( |
|
208 *iBitmap, |
|
209 Pbk2PresentationImageUtils::ELandscapeCropping, |
|
210 dummy ); |
|
211 } |
|
212 |
|
213 void CCCAppImageDecoding::ScaleBitmapL() |
|
214 { |
|
215 iBitmapScaler = CBitmapScaler::NewL(); |
|
216 iBitmapScaler->Scale( &iStatus, *iBitmap, iBitmapSize ); |
|
217 SetActive(); |
|
218 } |
|
219 |
|
220 void CCCAppImageDecoding::CreateBitmapL() |
|
221 { |
|
222 TInt initDecoder( KErrGeneral ); |
|
223 if ( iDecoderState == ECcaConvertThumbnailImage && iBitmapData ) |
|
224 { |
|
225 iImgDecoder = CImageDecoder::DataNewL( iFs, *iBitmapData, CImageDecoder::EOptionAlwaysThread ); |
|
226 initDecoder = KErrNone; |
|
227 } |
|
228 else if ( iDecoderState == ECcaConvertImageFromFile && iImageFullName ) |
|
229 { |
|
230 // leaaves if file doesn't exist |
|
231 TRAP ( initDecoder, iImgDecoder = CImageDecoder::FileNewL( iFs, *iImageFullName, CImageDecoder::EOptionAlwaysThread ) ); |
|
232 } |
|
233 if ( initDecoder ) |
|
234 { |
|
235 delete iBitmapScaler; |
|
236 iBitmapScaler = NULL; |
|
237 delete iImgDecoder; |
|
238 iImgDecoder = NULL; |
|
239 return; |
|
240 } |
|
241 |
|
242 if ( !iBitmap ) |
|
243 { |
|
244 const TFrameInfo info = iImgDecoder->FrameInfo(); |
|
245 // calculate size for the bitmap |
|
246 const TSize size( iBitmapSize ); |
|
247 TSize loadSize( info.iOverallSizeInPixels ); |
|
248 |
|
249 for( TInt i = 1 ; i < 9 ; i = i * 2 ) |
|
250 { |
|
251 // we can use scalers 1:1 1:2 1:4 1:8 |
|
252 TSize calcSize( ScaledLoadSize( info.iOverallSizeInPixels, i ) ); |
|
253 if( calcSize.iHeight < size.iHeight || |
|
254 calcSize.iWidth < size.iWidth ) |
|
255 { |
|
256 break; |
|
257 } |
|
258 loadSize = calcSize; |
|
259 } |
|
260 |
|
261 iBitmap = new ( ELeave ) CFbsBitmap; |
|
262 User::LeaveIfError( iBitmap->Create( loadSize, info.iFrameDisplayMode )); |
|
263 } |
|
264 |
|
265 iStatus = KRequestPending; |
|
266 iImgDecoder->Convert( &iStatus, *iBitmap ); |
|
267 SetActive(); |
|
268 } |