summaryrefslogtreecommitdiffstats
path: root/src/plugins/imageformats/mng/qmnghandler.cpp
blob: 7fabcd9e206892d50b5c76604565a2179b2c36fb (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Qt Software Information (qt-info@nokia.com)
**
** This file is part of the plugins of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the either Technology Preview License Agreement or the
** Beta Release License Agreement.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain
** additional rights. These rights are described in the Nokia Qt LGPL
** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
** package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
** If you are unsure which license is appropriate for your use, please
** contact the sales department at qt-sales@nokia.com.
** $QT_END_LICENSE$
**
****************************************************************************/

#include "qmnghandler.h"

#include "qimage.h"
#include "qvariant.h"
#include "qcolor.h"

#define MNG_USE_SO
#include <libmng.h>

QT_BEGIN_NAMESPACE

class QMngHandlerPrivate
{
    Q_DECLARE_PUBLIC(QMngHandler)
    public:
    bool haveReadNone;
    bool haveReadAll;
    mng_handle hMNG;
    QImage image;
    int elapsed;
    int nextDelay;
    int iterCount;
    int frameIndex;
    int nextIndex;
    int frameCount;
    mng_uint32 iStyle;
    mng_bool readData(mng_ptr pBuf, mng_uint32 iSize, mng_uint32p pRead);
    mng_bool writeData(mng_ptr pBuf, mng_uint32 iSize, mng_uint32p pWritten);
    mng_bool processHeader(mng_uint32 iWidth, mng_uint32 iHeight);
    QMngHandlerPrivate(QMngHandler *q_ptr);
    ~QMngHandlerPrivate();
    bool getNextImage(QImage *result);
    bool writeImage(const QImage &image);
    int currentImageNumber() const;
    int imageCount() const;
    bool jumpToImage(int imageNumber);
    bool jumpToNextImage();
    int nextImageDelay() const;
    bool setBackgroundColor(const QColor &color);
    QColor backgroundColor() const;
    QMngHandler *q_ptr;
};

static mng_bool myerror(mng_handle /*hMNG*/,
    mng_int32   iErrorcode,
    mng_int8    /*iSeverity*/,
    mng_chunkid iChunkname,
    mng_uint32  /*iChunkseq*/,
    mng_int32   iExtra1,
    mng_int32   iExtra2,
    mng_pchar   zErrortext)
{
    qWarning("MNG error %d: %s; chunk %c%c%c%c; subcode %d:%d",
        iErrorcode,zErrortext,
        (iChunkname>>24)&0xff,
        (iChunkname>>16)&0xff,
        (iChunkname>>8)&0xff,
        (iChunkname>>0)&0xff,
        iExtra1,iExtra2);
    return TRUE;
}

static mng_ptr myalloc(mng_size_t iSize)
{
#if defined(Q_OS_WINCE)
    mng_ptr ptr = malloc(iSize);
    memset(ptr, 0, iSize);
    return ptr;
#else
    return (mng_ptr)calloc(1, iSize);
#endif
}

static void myfree(mng_ptr pPtr, mng_size_t /*iSize*/)
{
    free(pPtr);
}

static mng_bool myopenstream(mng_handle)
{
    return MNG_TRUE;
}

static mng_bool myclosestream(mng_handle hMNG)
{
    QMngHandlerPrivate *pMydata = reinterpret_cast<QMngHandlerPrivate *>(mng_get_userdata(hMNG));
    pMydata->haveReadAll = true;
    return MNG_TRUE;
}

static mng_bool myreaddata(mng_handle hMNG,
                    mng_ptr    pBuf,
                    mng_uint32 iSize,
                    mng_uint32p pRead)
{
    QMngHandlerPrivate *pMydata = reinterpret_cast<QMngHandlerPrivate *>(mng_get_userdata(hMNG));
    return pMydata->readData(pBuf, iSize, pRead);
}

static mng_bool mywritedata(mng_handle hMNG,
		     mng_ptr pBuf,
		     mng_uint32 iSize,
		     mng_uint32p pWritten)
{
    QMngHandlerPrivate *pMydata = reinterpret_cast<QMngHandlerPrivate *>(mng_get_userdata(hMNG));
    return pMydata->writeData(pBuf, iSize, pWritten);
}

static mng_bool myprocessheader(mng_handle hMNG,
                                mng_uint32 iWidth,
                                mng_uint32 iHeight)
{
    QMngHandlerPrivate *pMydata = reinterpret_cast<QMngHandlerPrivate *>(mng_get_userdata(hMNG));
    return pMydata->processHeader(iWidth, iHeight);
}

static mng_ptr mygetcanvasline(mng_handle hMNG,
			mng_uint32 iLinenr)
{
    QMngHandlerPrivate *pMydata = reinterpret_cast<QMngHandlerPrivate *>(mng_get_userdata(hMNG));
    return (mng_ptr)pMydata->image.scanLine(iLinenr);
}

static mng_bool myrefresh(mng_handle /*hMNG*/,
                          mng_uint32 /*iX*/,
                          mng_uint32 /*iY*/,
                          mng_uint32 /*iWidth*/,
                          mng_uint32 /*iHeight*/)
{
    return MNG_TRUE;
}

static mng_uint32 mygettickcount(mng_handle hMNG)
{
    QMngHandlerPrivate *pMydata = reinterpret_cast<QMngHandlerPrivate *>(mng_get_userdata(hMNG));
    return pMydata->elapsed++;
}

static mng_bool mysettimer(mng_handle hMNG,
		    mng_uint32 iMsecs)
{
    QMngHandlerPrivate *pMydata = reinterpret_cast<QMngHandlerPrivate *>(mng_get_userdata(hMNG));
    pMydata->elapsed += iMsecs;
    pMydata->nextDelay = iMsecs;
    return MNG_TRUE;
}

static mng_bool myprocessterm(mng_handle hMNG,
                        mng_uint8   iTermaction,
                        mng_uint8   /*iIteraction*/,
                        mng_uint32  /*iDelay*/,
                        mng_uint32  iItermax)
{
    QMngHandlerPrivate *pMydata = reinterpret_cast<QMngHandlerPrivate *>(mng_get_userdata(hMNG));
    if (iTermaction == 3)
        pMydata->iterCount = iItermax;
    return MNG_TRUE;
}

static mng_bool mytrace(mng_handle,
                        mng_int32   iFuncnr,
                        mng_int32   iFuncseq,
                        mng_pchar   zFuncname)
{
    qDebug("mng trace: iFuncnr: %d iFuncseq: %d zFuncname: %s", iFuncnr, iFuncseq, zFuncname);
    return MNG_TRUE;
}

QMngHandlerPrivate::QMngHandlerPrivate(QMngHandler *q_ptr)
    : haveReadNone(true), haveReadAll(false), elapsed(0), nextDelay(0), iterCount(1),
      frameIndex(-1), nextIndex(0), frameCount(0), q_ptr(q_ptr)
{
    iStyle = (QSysInfo::ByteOrder == QSysInfo::LittleEndian) ? MNG_CANVAS_BGRA8 : MNG_CANVAS_ARGB8;
    // Initialize libmng
    hMNG = mng_initialize((mng_ptr)this, myalloc, myfree, mytrace);
    if (hMNG) {
	// Set callback functions
        mng_setcb_errorproc(hMNG, myerror);
        mng_setcb_openstream(hMNG, myopenstream);
        mng_setcb_closestream(hMNG, myclosestream);
        mng_setcb_readdata(hMNG, myreaddata);
        mng_setcb_writedata(hMNG, mywritedata);
        mng_setcb_processheader(hMNG, myprocessheader);
        mng_setcb_getcanvasline(hMNG, mygetcanvasline);
        mng_setcb_refresh(hMNG, myrefresh);
        mng_setcb_gettickcount(hMNG, mygettickcount);
        mng_setcb_settimer(hMNG, mysettimer);
        mng_setcb_processterm(hMNG, myprocessterm);
        mng_set_doprogressive(hMNG, MNG_FALSE);
	mng_set_suspensionmode(hMNG, MNG_TRUE);
    }
}

QMngHandlerPrivate::~QMngHandlerPrivate()
{
    mng_cleanup(&hMNG);
}

mng_bool QMngHandlerPrivate::readData(mng_ptr pBuf, mng_uint32 iSize, mng_uint32p pRead)
{
    Q_Q(QMngHandler);
    *pRead = q->device()->read((char *)pBuf, iSize);
    return (*pRead > 0) ? MNG_TRUE : MNG_FALSE;
}

mng_bool QMngHandlerPrivate::writeData(mng_ptr pBuf, mng_uint32 iSize, mng_uint32p pWritten)
{
    Q_Q(QMngHandler);
    *pWritten = q->device()->write((char *)pBuf, iSize);
    return MNG_TRUE;
}

mng_bool QMngHandlerPrivate::processHeader(mng_uint32 iWidth, mng_uint32 iHeight)
{
    if (mng_set_canvasstyle(hMNG, iStyle) != MNG_NOERROR)
        return MNG_FALSE;
    image = QImage(iWidth, iHeight, QImage::Format_ARGB32);
    image.fill(0);
    return MNG_TRUE;
}

bool QMngHandlerPrivate::getNextImage(QImage *result)
{
    mng_retcode ret;
    if (haveReadNone) {
        haveReadNone = false;
        ret = mng_readdisplay(hMNG);
    } else {
        ret = mng_display_resume(hMNG);
    }
    if ((MNG_NOERROR == ret) || (MNG_NEEDTIMERWAIT == ret)) {
        *result = image;
        image.fill(0);
        frameIndex = nextIndex++;
        if (haveReadAll && (frameCount == 0))
            frameCount = nextIndex;
        return true;
    }
    return false;
}

bool QMngHandlerPrivate::writeImage(const QImage &image)
{
    mng_reset(hMNG);
    if (mng_create(hMNG) != MNG_NOERROR)
	return false;

    this->image = image.convertToFormat(QImage::Format_ARGB32);
    int w = image.width();
    int h = image.height();

    if (
    // width, height, ticks, layercount, framecount, playtime, simplicity
         (mng_putchunk_mhdr(hMNG, w, h, 1000, 0, 0, 0, 7) == MNG_NOERROR) &&
    // termination_action, action_after_iterations, delay, iteration_max
         (mng_putchunk_term(hMNG, 3, 0, 1, 0x7FFFFFFF) == MNG_NOERROR) &&
    // width, height, bitdepth, colortype, compression, filter, interlace
         (mng_putchunk_ihdr(hMNG, w, h, 8, 6, 0, 0, 0) == MNG_NOERROR) &&
    // width, height, colortype, bitdepth, compression, filter, interlace, canvasstyle, getcanvasline
         (mng_putimgdata_ihdr(hMNG, w, h, 6, 8, 0, 0, 0, iStyle, mygetcanvasline) == MNG_NOERROR) &&
         (mng_putchunk_iend(hMNG) == MNG_NOERROR) &&
         (mng_putchunk_mend(hMNG) == MNG_NOERROR) &&
         (mng_write(hMNG) == MNG_NOERROR)
        )
        return true;
    return false;
}

int QMngHandlerPrivate::currentImageNumber() const
{
//    return mng_get_currentframe(hMNG) % imageCount(); not implemented, apparently
    return frameIndex;
}

int QMngHandlerPrivate::imageCount() const
{
//    return mng_get_totalframes(hMNG); not implemented, apparently
    if (haveReadAll)
        return frameCount;
    return 0; // Don't know
}

bool QMngHandlerPrivate::jumpToImage(int imageNumber)
{
    if (imageNumber == nextIndex)
        return true;

    if ((imageNumber == 0) && haveReadAll && (nextIndex == frameCount)) {
        // Loop!
        nextIndex = 0;
        return true;
    }
    if (mng_display_freeze(hMNG) == MNG_NOERROR) {
        if (mng_display_goframe(hMNG, imageNumber) == MNG_NOERROR) {
            nextIndex = imageNumber;
            return true;
        }
    }
    return false;
}

bool QMngHandlerPrivate::jumpToNextImage()
{
    return jumpToImage((currentImageNumber()+1) % imageCount());
}

int QMngHandlerPrivate::nextImageDelay() const
{
    return nextDelay;
}

bool QMngHandlerPrivate::setBackgroundColor(const QColor &color)
{
    mng_uint16 iRed = (mng_uint16)(color.red() << 8);
    mng_uint16 iBlue = (mng_uint16)(color.blue() << 8);
    mng_uint16 iGreen = (mng_uint16)(color.green() << 8);
    return (mng_set_bgcolor(hMNG, iRed, iBlue, iGreen) == MNG_NOERROR);
}

QColor QMngHandlerPrivate::backgroundColor() const
{
    mng_uint16 iRed;
    mng_uint16 iBlue;
    mng_uint16 iGreen;
    if (mng_get_bgcolor(hMNG, &iRed, &iBlue, &iGreen) == MNG_NOERROR)
        return QColor((iRed >> 8) & 0xFF, (iGreen >> 8) & 0xFF, (iBlue >> 8) & 0xFF);
    return QColor();
}

QMngHandler::QMngHandler()
    : d_ptr(new QMngHandlerPrivate(this))
{
}

QMngHandler::~QMngHandler()
{
}

/*! \reimp */
bool QMngHandler::canRead() const
{
    Q_D(const QMngHandler);
    if (!d->haveReadNone)
	return (!d->haveReadAll || (d->haveReadAll && (d->nextIndex < d->frameCount)));

    if (canRead(device())) {
        setFormat("mng");
        return true;
    }
    return false;
}

/*! \internal */
bool QMngHandler::canRead(QIODevice *device)
{
    if (!device) {
        qWarning("QMngHandler::canRead() called with no device");
        return false;
    }

    return device->peek(8) == "\x8A\x4D\x4E\x47\x0D\x0A\x1A\x0A";
}

/*! \reimp */
QByteArray QMngHandler::name() const
{
    return "mng";    
}

/*! \reimp */
bool QMngHandler::read(QImage *image)
{
    Q_D(QMngHandler);
    return canRead() ? d->getNextImage(image) : false;
}

/*! \reimp */
bool QMngHandler::write(const QImage &image)
{
    Q_D(QMngHandler);
    return d->writeImage(image);
}

/*! \reimp */
int QMngHandler::currentImageNumber() const
{
    Q_D(const QMngHandler);
    return d->currentImageNumber();
}

/*! \reimp */
int QMngHandler::imageCount() const
{
    Q_D(const QMngHandler);
    return d->imageCount();
}

/*! \reimp */
bool QMngHandler::jumpToImage(int imageNumber)
{
    Q_D(QMngHandler);
    return d->jumpToImage(imageNumber);
}

/*! \reimp */
bool QMngHandler::jumpToNextImage()
{
    Q_D(QMngHandler);
    return d->jumpToNextImage();
}

/*! \reimp */
int QMngHandler::loopCount() const
{
    Q_D(const QMngHandler);
    if (d->iterCount == 0x7FFFFFFF)
        return -1; // infinite loop
    return d->iterCount-1;
}

/*! \reimp */
int QMngHandler::nextImageDelay() const
{
    Q_D(const QMngHandler);
    return d->nextImageDelay();
}

/*! \reimp */
QVariant QMngHandler::option(ImageOption option) const
{
    Q_D(const QMngHandler);
    if (option == QImageIOHandler::Animation)
        return true;
    else if (option == QImageIOHandler::BackgroundColor)
        return d->backgroundColor();
    return QVariant();
}

/*! \reimp */
void QMngHandler::setOption(ImageOption option, const QVariant & value)
{
    Q_D(QMngHandler);
    if (option == QImageIOHandler::BackgroundColor)
        d->setBackgroundColor(qVariantValue<QColor>(value));
}

/*! \reimp */
bool QMngHandler::supportsOption(ImageOption option) const
{
    if (option == QImageIOHandler::Animation)
        return true;
    else if (option == QImageIOHandler::BackgroundColor)
        return true;
    return false;
}

QT_END_NAMESPACE