|
1 /* |
|
2 * Copyright (c) 2006 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 CMPXImageUtil. |
|
15 * |
|
16 */ |
|
17 |
|
18 // INCLUDE FILES |
|
19 #include <e32std.h> |
|
20 #include <e32base.h> |
|
21 #include <bitmaptransforms.h> |
|
22 #include <mda/common/video.h> |
|
23 #include <eikenv.h> |
|
24 #include <icl/imagedata.h> |
|
25 #include <imageconversion.h> |
|
26 #include <IclExtJpegApi.h> |
|
27 |
|
28 #include "mpximageutil.h" |
|
29 |
|
30 //This value is used to stretch so the image fills the container. |
|
31 const TReal MaxStretchRatio = 1.1f; |
|
32 |
|
33 LOCAL_C TInt Stretch (TInt aValue, TInt aLimit) |
|
34 { |
|
35 TInt ret( aValue * MaxStretchRatio ); |
|
36 ret = (ret>aLimit) ? aLimit : ret; |
|
37 return ret; |
|
38 } |
|
39 |
|
40 // ============================ MEMBER FUNCTIONS =============================== |
|
41 |
|
42 |
|
43 // ----------------------------------------------------------------------------- |
|
44 // Two-phased constructor. |
|
45 // ----------------------------------------------------------------------------- |
|
46 // |
|
47 CMPXImageUtil* CMPXImageUtil::NewL( |
|
48 MMPXAlbumArtUtilObserver& aObserver) |
|
49 { |
|
50 CMPXImageUtil* self = new ( ELeave ) CMPXImageUtil(aObserver); |
|
51 CleanupStack::PushL( self ); |
|
52 self->ConstructL(); |
|
53 CleanupStack::Pop(); // self |
|
54 return self; |
|
55 } |
|
56 |
|
57 // ----------------------------------------------------------------------------- |
|
58 // C++ default constructor can NOT contain any code, that |
|
59 // might leave. |
|
60 // ----------------------------------------------------------------------------- |
|
61 // |
|
62 CMPXImageUtil::CMPXImageUtil(MMPXAlbumArtUtilObserver& aObserver) |
|
63 : CActive(EPriorityStandard), iObserver(aObserver) |
|
64 { |
|
65 iBitmap = NULL; |
|
66 iState = EIdle; |
|
67 } |
|
68 |
|
69 // ----------------------------------------------------------------------------- |
|
70 // Symbian 2nd phase constructor can leave. |
|
71 // ----------------------------------------------------------------------------- |
|
72 // |
|
73 void CMPXImageUtil::ConstructL() |
|
74 { |
|
75 iScaler = CBitmapScaler::NewL(); |
|
76 User::LeaveIfError(iFs.Connect()); |
|
77 CActiveScheduler::Add( this ); |
|
78 } |
|
79 |
|
80 // ----------------------------------------------------------------------------- |
|
81 // Destructor |
|
82 // ----------------------------------------------------------------------------- |
|
83 // |
|
84 CMPXImageUtil::~CMPXImageUtil() |
|
85 { |
|
86 Cancel(); |
|
87 delete iImageDecoder; // CImageDecoder must be deleted before the |
|
88 delete iScaler; |
|
89 iFs.Close(); |
|
90 delete iImageData; |
|
91 } |
|
92 |
|
93 // ----------------------------------------------------------------------------- |
|
94 // Starts to decode an image from a file. |
|
95 // ----------------------------------------------------------------------------- |
|
96 // |
|
97 void CMPXImageUtil::StartToDecodeL(const TDesC& aFileName, |
|
98 const TSize& aSize, |
|
99 TDisplayMode aDisplayMode /*=EColor64K*/) |
|
100 { |
|
101 if(iState) |
|
102 { |
|
103 User::Leave(KErrNotReady); |
|
104 } |
|
105 |
|
106 delete iImageDecoder; |
|
107 iImageDecoder = NULL; |
|
108 delete iBitmap; |
|
109 iBitmap = NULL; |
|
110 delete iImageData; |
|
111 iImageData = NULL; |
|
112 |
|
113 // create the decoder |
|
114 |
|
115 TRAPD( err, iImageDecoder = CExtJpegDecoder::FileNewL( |
|
116 CExtJpegDecoder::EHwImplementation, |
|
117 iFs, |
|
118 aFileName, |
|
119 CImageDecoder::EOptionNone ) ); |
|
120 if (KErrNone != err) |
|
121 { |
|
122 TRAP(err,iImageDecoder = CExtJpegDecoder::FileNewL( |
|
123 CExtJpegDecoder::ESwImplementation, |
|
124 iFs, |
|
125 aFileName, |
|
126 CImageDecoder::EOptionNone ) ); |
|
127 if (KErrNone != err) |
|
128 { |
|
129 iImageDecoder = CImageDecoder::FileNewL( |
|
130 iFs, |
|
131 aFileName, |
|
132 CImageDecoder::EOptionNone); |
|
133 } |
|
134 } |
|
135 |
|
136 // Get image size |
|
137 TSize bitmapSize = CalculateDecodeSize(aSize); |
|
138 // create the destination bitmap |
|
139 iBitmap = new (ELeave) CFbsBitmap(); |
|
140 User::LeaveIfError(iBitmap->Create(bitmapSize, aDisplayMode)); |
|
141 |
|
142 // start conversion to bitmap |
|
143 iState = EDecoding; |
|
144 iImageDecoder->Convert(&iStatus, *iBitmap); |
|
145 |
|
146 iObserver.ExtractAlbumArtStarted(); |
|
147 SetActive(); |
|
148 } |
|
149 |
|
150 // ----------------------------------------------------------------------------- |
|
151 // CMPXImageUtil::DoCancel |
|
152 // Implementation of CActive |
|
153 // ----------------------------------------------------------------------------- |
|
154 // |
|
155 void CMPXImageUtil::DoCancel() |
|
156 { |
|
157 switch ( iState ) |
|
158 { |
|
159 case EDecoding: |
|
160 { |
|
161 iImageDecoder->Cancel(); |
|
162 // need to delete bitmap as we have are still the owner until the |
|
163 // operation completes |
|
164 if ( iBitmap ) |
|
165 { |
|
166 delete iBitmap; |
|
167 iBitmap = NULL; |
|
168 } |
|
169 break; |
|
170 } |
|
171 case EScaling: |
|
172 { |
|
173 iScaler->Cancel(); |
|
174 if ( iBitmap ) |
|
175 { |
|
176 delete iBitmap; |
|
177 iBitmap = NULL; |
|
178 } |
|
179 break; |
|
180 } |
|
181 default: // No Asynchronous events are taking place, do nothing. |
|
182 { |
|
183 break; |
|
184 } |
|
185 } |
|
186 |
|
187 delete iImageData; |
|
188 iImageData = NULL; |
|
189 delete iImageDecoder; |
|
190 iImageDecoder = NULL; |
|
191 } |
|
192 |
|
193 // ----------------------------------------------------------------------------- |
|
194 // Implementation of CActive |
|
195 // ----------------------------------------------------------------------------- |
|
196 // |
|
197 void CMPXImageUtil::RunL() |
|
198 { |
|
199 TInt deleteDecoder( ETrue ); |
|
200 switch( iState ) |
|
201 { |
|
202 case EDecoding: |
|
203 { |
|
204 if( iStatus == KErrNone ) |
|
205 { |
|
206 if ( !iScaleRquired ) |
|
207 { |
|
208 iState = EIdle; |
|
209 iObserver.ExtractAlbumArtCompleted(iBitmap,KErrNone); |
|
210 iBitmap = NULL; |
|
211 } |
|
212 else |
|
213 { |
|
214 deleteDecoder = EFalse; |
|
215 ScaleL(); |
|
216 } |
|
217 break; |
|
218 } |
|
219 else |
|
220 { |
|
221 // some error |
|
222 if ( iBitmap ) |
|
223 { |
|
224 delete iBitmap; |
|
225 iBitmap = NULL; |
|
226 } |
|
227 iState = EIdle; |
|
228 iObserver.ExtractAlbumArtCompleted(iBitmap, iStatus.Int()); |
|
229 break; |
|
230 } |
|
231 } |
|
232 case EScaling: |
|
233 { |
|
234 iState = EIdle; |
|
235 iObserver.ExtractAlbumArtCompleted(iBitmap,iStatus.Int()); |
|
236 iBitmap = NULL; |
|
237 } |
|
238 break; |
|
239 |
|
240 default: // some error |
|
241 { |
|
242 iState = EIdle; |
|
243 iObserver.ExtractAlbumArtCompleted(iBitmap,iStatus.Int()); |
|
244 break; |
|
245 } |
|
246 } |
|
247 |
|
248 // It's safe to destroy iImageData here |
|
249 delete iImageData; |
|
250 iImageData = NULL; |
|
251 |
|
252 if ( deleteDecoder ) |
|
253 { |
|
254 delete iImageDecoder; |
|
255 iImageDecoder = NULL; |
|
256 } |
|
257 } |
|
258 |
|
259 // ----------------------------------------------------------------------------- |
|
260 // Scales iBitmap by iSize |
|
261 // ----------------------------------------------------------------------------- |
|
262 // |
|
263 void CMPXImageUtil::ScaleL() |
|
264 { |
|
265 iScaler->Scale(&iStatus, *iBitmap, iSize, EFalse); |
|
266 iState = EScaling; |
|
267 SetActive(); |
|
268 } |
|
269 |
|
270 // ----------------------------------------------------------------------------- |
|
271 // Starts to decode an image from a buffer. |
|
272 // ----------------------------------------------------------------------------- |
|
273 // |
|
274 void CMPXImageUtil::StartToDecodeL( const TSize& aSize, |
|
275 HBufC8* aAlbumArt, TDisplayMode aDisplayMode/*=EColor64K*/ ) |
|
276 { |
|
277 if(iState) |
|
278 { |
|
279 User::Leave( KErrNotReady ); |
|
280 } |
|
281 |
|
282 delete iImageDecoder; |
|
283 iImageDecoder = NULL; |
|
284 delete iBitmap; |
|
285 iBitmap = NULL; |
|
286 delete iImageData; |
|
287 iImageData = NULL; |
|
288 // storing the pointer to aAlbumArt, ownership was transferred to us. |
|
289 iImageData = aAlbumArt; |
|
290 // create the decoder |
|
291 |
|
292 |
|
293 TRAPD( err, iImageDecoder = CExtJpegDecoder::DataNewL( |
|
294 CExtJpegDecoder::EHwImplementation, |
|
295 iFs, |
|
296 *iImageData, |
|
297 CImageDecoder::EOptionNone ) ); |
|
298 if ( KErrNone != err ) |
|
299 { |
|
300 TRAP(err,iImageDecoder = CExtJpegDecoder::DataNewL( |
|
301 CExtJpegDecoder::ESwImplementation, |
|
302 iFs, |
|
303 *iImageData, |
|
304 CImageDecoder::EOptionNone ) ); |
|
305 if ( KErrNone != err ) |
|
306 { |
|
307 iImageDecoder = CImageDecoder::DataNewL( |
|
308 iFs, |
|
309 *iImageData, |
|
310 CImageDecoder::EOptionNone ); |
|
311 } |
|
312 } |
|
313 |
|
314 |
|
315 |
|
316 |
|
317 TSize bitmapSize = CalculateDecodeSize( aSize ); |
|
318 |
|
319 // create the destination bitmap |
|
320 iBitmap = new ( ELeave ) CFbsBitmap(); |
|
321 User::LeaveIfError( iBitmap->Create( bitmapSize, aDisplayMode ) ); |
|
322 // start conversion to bitmap |
|
323 iState = EDecoding; |
|
324 iImageDecoder->Convert( &iStatus, *iBitmap ); |
|
325 |
|
326 iObserver.ExtractAlbumArtStarted(); |
|
327 SetActive(); |
|
328 } |
|
329 // ----------------------------------------------------------------------------- |
|
330 // Calculates the decode size and prepares members for scaling. |
|
331 // ----------------------------------------------------------------------------- |
|
332 // |
|
333 TSize CMPXImageUtil::CalculateDecodeSize(const TSize& aSize) |
|
334 { |
|
335 const TFrameInfo& frameInfo = iImageDecoder->FrameInfo(); |
|
336 TSize bitmapSize = frameInfo.iOverallSizeInPixels; |
|
337 TReal sourceAspectRatio( TReal( bitmapSize.iWidth) / bitmapSize.iHeight ); |
|
338 TReal destinationAspectRatio( TReal( aSize.iWidth ) / aSize.iHeight ); |
|
339 TReal xScale = TReal( bitmapSize.iWidth ) / aSize.iWidth; |
|
340 TReal yScale = TReal( bitmapSize.iHeight ) / aSize.iHeight; |
|
341 TReal scale(0.0f); |
|
342 |
|
343 if ( sourceAspectRatio > destinationAspectRatio ) |
|
344 { |
|
345 scale = xScale; |
|
346 iSize.iWidth = aSize.iWidth; |
|
347 iSize.iHeight = Stretch( TReal( bitmapSize.iHeight ) / scale , |
|
348 aSize.iHeight ); |
|
349 } |
|
350 else |
|
351 { |
|
352 scale = yScale; |
|
353 iSize.iWidth = Stretch( TReal( bitmapSize.iWidth ) / scale , |
|
354 aSize.iWidth); |
|
355 iSize.iHeight = aSize.iHeight; |
|
356 } |
|
357 |
|
358 if ((frameInfo.iFlags & TFrameInfo::EFullyScaleable)) |
|
359 { |
|
360 iScaleRquired = EFalse; |
|
361 bitmapSize = iSize; |
|
362 } |
|
363 else |
|
364 //Decoder only supports 2, 4 and 8 scallyng, the image will need |
|
365 //to be reescaled after decoding. |
|
366 //Decoding to a scale that is just a bit bigger thant the target, |
|
367 //this will save memory and resources and we will get a sharp image |
|
368 //after scaling. |
|
369 { |
|
370 TInt intscale = ( scale >= 8 ) ? 8 : |
|
371 ( scale >= 4 ) ? 4 : |
|
372 ( scale >= 2 ) ? 2 : 1; |
|
373 TUint xCorrection = ( bitmapSize.iWidth % intscale ) ? 1 : 0; |
|
374 TUint yCorrection = ( bitmapSize.iHeight % intscale ) ? 1 : 0; |
|
375 bitmapSize.iWidth /= intscale; |
|
376 bitmapSize.iHeight /= intscale; |
|
377 bitmapSize += TSize( xCorrection, yCorrection ); |
|
378 iScaleRquired = ETrue; |
|
379 } |
|
380 return bitmapSize; |
|
381 } |
|
382 |
|
383 // ----------------------------------------------------------------------------- |
|
384 // CMPXImageUtil::CancelRequest |
|
385 // Cancel Asynch requests |
|
386 // ----------------------------------------------------------------------------- |
|
387 // |
|
388 void CMPXImageUtil::CancelRequest() |
|
389 { |
|
390 Cancel(); |
|
391 } |
|
392 |
|
393 // End of File |