summaryrefslogtreecommitdiff
path: root/slideshow/source/engine/transitions/slidechangebase.cxx
blob: dd0cabfbce4d8ee1046819d4ee77037d3399cca5 (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
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
 * This file is part of the LibreOffice project.
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 * This file incorporates work covered by the following license notice:
 *
 *   Licensed to the Apache Software Foundation (ASF) under one or more
 *   contributor license agreements. See the NOTICE file distributed
 *   with this work for additional information regarding copyright
 *   ownership. The ASF licenses this file to you under the Apache
 *   License, Version 2.0 (the "License"); you may not use this file
 *   except in compliance with the License. You may obtain a copy of
 *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
 */


#include <canvas/debug.hxx>
#include <tools/diagnose_ex.h>
#include <canvas/canvastools.hxx>
#include <basegfx/numeric/ftools.hxx>
#include <basegfx/polygon/b2dpolygontools.hxx>
#include <basegfx/polygon/b2dpolypolygontools.hxx>
#include <basegfx/matrix/b2dhommatrixtools.hxx>
#include <cppcanvas/basegfxfactory.hxx>

#include "slidechangebase.hxx"
#include "tools.hxx"

#include <boost/bind.hpp>
#include <algorithm>

using namespace com::sun::star;

namespace slideshow {
namespace internal {

SlideChangeBase::SlideChangeBase( boost::optional<SlideSharedPtr> const & leavingSlide,
                                  const SlideSharedPtr&                   pEnteringSlide,
                                  const SoundPlayerSharedPtr&             pSoundPlayer,
                                  const UnoViewContainer&                 rViewContainer,
                                  ScreenUpdater&                          rScreenUpdater,
                                  EventMultiplexer&                       rEventMultiplexer,
                                  bool                                    bCreateLeavingSprites,
                                  bool                                    bCreateEnteringSprites ) :
      mpSoundPlayer( pSoundPlayer ),
      mrEventMultiplexer(rEventMultiplexer),
      mrScreenUpdater(rScreenUpdater),
      maLeavingSlide( leavingSlide ),
      mpEnteringSlide( pEnteringSlide ),
      maViewData(),
      mrViewContainer(rViewContainer),
      mbCreateLeavingSprites(bCreateLeavingSprites),
      mbCreateEnteringSprites(bCreateEnteringSprites),
      mbSpritesVisible(false),
      mbFinished(false),
      mbPrefetched(false)
{
    ENSURE_OR_THROW(
        pEnteringSlide,
        "SlideChangeBase::SlideChangeBase(): Invalid entering slide!" );
}

SlideBitmapSharedPtr SlideChangeBase::getLeavingBitmap( const ViewEntry& rViewEntry ) const
{
    if( !rViewEntry.mpLeavingBitmap )
        rViewEntry.mpLeavingBitmap = createBitmap(rViewEntry.mpView,
                                                  maLeavingSlide);

    return rViewEntry.mpLeavingBitmap;
}

SlideBitmapSharedPtr SlideChangeBase::getEnteringBitmap( const ViewEntry& rViewEntry ) const
{
    if( !rViewEntry.mpEnteringBitmap )
        rViewEntry.mpEnteringBitmap = createBitmap( rViewEntry.mpView,
                                                    boost::optional<SlideSharedPtr>(mpEnteringSlide) );

    return rViewEntry.mpEnteringBitmap;
}

SlideBitmapSharedPtr SlideChangeBase::createBitmap( const UnoViewSharedPtr&                rView,
                                                    const boost::optional<SlideSharedPtr>& rSlide ) const
{
    SlideBitmapSharedPtr pRet;
    if( !rSlide )
        return pRet;

    SlideSharedPtr const & pSlide = *rSlide;
    if( !pSlide )
    {
        // TODO(P3): No need to generate a bitmap here. This only made
        // the code more uniform. Faster would be to simply clear the
        // sprite to black.

        // create empty, black-filled bitmap
        const basegfx::B2ISize slideSizePixel(
            getSlideSizePixel( basegfx::B2DSize( mpEnteringSlide->getSlideSize() ),
                               rView ));

        cppcanvas::CanvasSharedPtr pCanvas( rView->getCanvas() );

        // create a bitmap of appropriate size
        cppcanvas::BitmapSharedPtr pBitmap(
            cppcanvas::BaseGfxFactory::getInstance().createBitmap(
                pCanvas,
                slideSizePixel ) );

        ENSURE_OR_THROW(
            pBitmap,
            "SlideChangeBase::createBitmap(): Cannot create page bitmap" );

        cppcanvas::BitmapCanvasSharedPtr pBitmapCanvas(
            pBitmap->getBitmapCanvas() );

        ENSURE_OR_THROW( pBitmapCanvas,
                          "SlideChangeBase::createBitmap(): "
                          "Cannot create page bitmap canvas" );

        // set transformation to identitiy (->device pixel)
        pBitmapCanvas->setTransformation( ::basegfx::B2DHomMatrix() );

        // clear bitmap to black
        fillRect( pBitmapCanvas,
                  ::basegfx::B2DRectangle( 0.0, 0.0,
                                           slideSizePixel.getX(),
                                           slideSizePixel.getY() ),
                  0x000000FFU );

        pRet.reset( new SlideBitmap( pBitmap ));
    }
    else
    {
        pRet = pSlide->getCurrentSlideBitmap( rView );
    }

    return pRet;
}

::basegfx::B2ISize SlideChangeBase::getEnteringSlideSizePixel( const UnoViewSharedPtr& pView ) const
{
    return getSlideSizePixel( basegfx::B2DSize( mpEnteringSlide->getSlideSize() ),
                              pView );
}

void SlideChangeBase::renderBitmap(
    SlideBitmapSharedPtr const & pSlideBitmap,
    cppcanvas::CanvasSharedPtr const & pCanvas )
{
    if( pSlideBitmap && pCanvas )
    {
        // need to render without any transformation (we
        // assume device units):
        const basegfx::B2DHomMatrix viewTransform(
            pCanvas->getTransformation() );
        const basegfx::B2DPoint pageOrigin(
            viewTransform * basegfx::B2DPoint() );
        const cppcanvas::CanvasSharedPtr pDevicePixelCanvas(
            pCanvas->clone() );

        // render at output position, don't modify bitmap object (no move!):
        const basegfx::B2DHomMatrix transform(basegfx::tools::createTranslateB2DHomMatrix(
            pageOrigin.getX(), pageOrigin.getY()));

        pDevicePixelCanvas->setTransformation( transform );
        pSlideBitmap->draw( pDevicePixelCanvas );
    }
}

void SlideChangeBase::prefetch( const AnimatableShapeSharedPtr&,
                                const ShapeAttributeLayerSharedPtr& )
{
    // we're a one-shot activity, and already finished
    if( mbFinished || mbPrefetched )
        return;

    // register ourselves for view change events
    mrEventMultiplexer.addViewHandler( shared_from_this() );

    // init views and create slide bitmaps
    std::for_each( mrViewContainer.begin(),
                   mrViewContainer.end(),
                   boost::bind( &SlideChangeBase::viewAdded,
                                this,
                                _1 ));

    mbPrefetched = true;
}

void SlideChangeBase::start( const AnimatableShapeSharedPtr&     rShape,
                             const ShapeAttributeLayerSharedPtr& rLayer )
{
    // we're a one-shot activity, and already finished
    if( mbFinished )
        return;

    prefetch(rShape,rLayer); // no-op, if already done

    // get the subclasses a chance to do any specific initialization before run
    for ( ViewsVecT::const_iterator aCurr( beginViews() ), aEnd( endViews() ); aCurr != aEnd; ++aCurr )
        prepareForRun( *aCurr, aCurr->mpView->getCanvas() );

    // start accompanying sound effect, if any
    if( mpSoundPlayer )
    {
        mpSoundPlayer->startPlayback();
        // xxx todo: for now, presentation.cxx takes care about the slide
        // #i50492#  transition sound object, so just release it here
        mpSoundPlayer.reset();
    }
}

void SlideChangeBase::end()
{
    // we're a one-shot activity, and already finished
    if( mbFinished )
        return;

    try
    {
        // draw fully entered bitmap:
        ViewsVecT::const_iterator aCurr( beginViews() );
        const ViewsVecT::const_iterator aEnd( endViews() );
        while( aCurr != aEnd )
        {
            // fully clear view content to background color
            aCurr->mpView->clearAll();

            const SlideBitmapSharedPtr pSlideBitmap( getEnteringBitmap( *aCurr ));
            pSlideBitmap->clip( basegfx::B2DPolyPolygon() /* no clipping */ );
            aCurr->mpView->clearAll();
            renderBitmap( pSlideBitmap,
                          aCurr->mpView->getCanvas() );

            ++aCurr;
        }
    }
    catch( uno::Exception& )
    {
        // make sure releasing below happens
    }

    // swap changes to screen
    mrScreenUpdater.notifyUpdate();

    // make object dysfunctional
    mbFinished = true;
    ViewsVecT().swap(maViewData);
    maLeavingSlide.reset();
    mpEnteringSlide.reset();

    // sprites have been binned above
    mbSpritesVisible = false;

    // remove also from event multiplexer, we're dead anyway
    mrEventMultiplexer.removeViewHandler( shared_from_this() );
}

bool SlideChangeBase::operator()( double nValue )
{
    if( mbFinished )
        return false;

    const std::size_t nEntries( maViewData.size() );
    bool bSpritesVisible( mbSpritesVisible );

    for( ::std::size_t i=0; i<nEntries; ++i )
    {
        // calc sprite offsets. The enter/leaving bitmaps are only
        // as large as the actual slides. For scaled-down
        // presentations, we have to move the left, top edge of
        // those bitmaps to the actual position, governed by the
        // given view transform. The aSpritePosPixel local
        // variable is already in device coordinate space
        // (i.e. pixel).

        ViewEntry& rViewEntry( maViewData[i] );
        const ::cppcanvas::CanvasSharedPtr& rCanvas( rViewEntry.mpView->getCanvas() );
        ::cppcanvas::CustomSpriteSharedPtr& rInSprite( rViewEntry.mpInSprite );
        ::cppcanvas::CustomSpriteSharedPtr& rOutSprite( rViewEntry.mpOutSprite );

        // TODO(F2): Properly respect clip here.

        // Might have to be transformed, too.
        const ::basegfx::B2DHomMatrix aViewTransform(
            rViewEntry.mpView->getTransformation() );
        const ::basegfx::B2DPoint aSpritePosPixel(
            aViewTransform * ::basegfx::B2DPoint() );

        // move sprite to final output position, in
        // device coordinates
        if( rOutSprite )
            rOutSprite->movePixel( aSpritePosPixel );
        if( rInSprite )
            rInSprite->movePixel( aSpritePosPixel );

        if( !mbSpritesVisible )
        {
            if( rOutSprite )
            {
                // only render once: clipping is done
                // exclusively with the sprite
                const ::cppcanvas::CanvasSharedPtr pOutContentCanvas(
                    rOutSprite->getContentCanvas() );
                if( pOutContentCanvas)
                {
                    // TODO(Q2): Use basegfx bitmaps here

                    // TODO(F1): SlideBitmap is not fully portable
                    // between different canvases!

                    // render the content
                    OSL_ASSERT( getLeavingBitmap( rViewEntry ) );
                    if( getLeavingBitmap( rViewEntry ) )
                        getLeavingBitmap( rViewEntry )->draw( pOutContentCanvas );
                }
            }

            if( rInSprite )
            {
                // only render once: clipping is done
                // exclusively with the sprite
                const ::cppcanvas::CanvasSharedPtr pInContentCanvas(
                    rInSprite->getContentCanvas() );
                if( pInContentCanvas )
                {
                    // TODO(Q2): Use basegfx bitmaps here

                    // TODO(F1): SlideBitmap is not fully portable
                    // between different canvases!

                    // render the content
                    getEnteringBitmap( rViewEntry )->draw( pInContentCanvas );
                }
            }
        }

        if( rOutSprite )
            performOut( rOutSprite, rViewEntry, rCanvas, nValue );
        if( rInSprite )
            performIn( rInSprite, rViewEntry, rCanvas, nValue );

        // finishing deeds for first run.
        if( !mbSpritesVisible)
        {
            // enable sprites:
            if( rOutSprite )
                rOutSprite->show();
            if( rInSprite )
                rInSprite->show();
            bSpritesVisible = true;
        }
    } // for_each( sprite )

    mbSpritesVisible = bSpritesVisible;
    mrScreenUpdater.notifyUpdate();

    return true;
}

void SlideChangeBase::prepareForRun(
    const ViewEntry& /* rViewEntry */,
    const boost::shared_ptr<cppcanvas::Canvas>& /* rDestinationCanvas */ )
{
}

void SlideChangeBase::performIn(
    const cppcanvas::CustomSpriteSharedPtr&   /*rSprite*/,
    const ViewEntry&                          /*rViewEntry*/,
    const cppcanvas::CanvasSharedPtr&         /*rDestinationCanvas*/,
    double                                    /*t*/ )
{
}

void SlideChangeBase::performOut(
    const cppcanvas::CustomSpriteSharedPtr&  /*rSprite*/,
    const ViewEntry&                         /*rViewEntry*/,
    const cppcanvas::CanvasSharedPtr&        /*rDestinationCanvas*/,
    double                                   /*t*/ )
{
}

double SlideChangeBase::getUnderlyingValue() const
{
    return 0.0;     // though this should be used in concert with
                    // ActivitiesFactory::createSimpleActivity, better
                    // explicitly name our start value.
                    // Permissible range for operator() above is [0,1]
}

void SlideChangeBase::viewAdded( const UnoViewSharedPtr& rView )
{
    // we're a one-shot activity, and already finished
    if( mbFinished )
        return;

    maViewData.push_back( ViewEntry(rView) );

    ViewEntry& rEntry( maViewData.back() );
    getEnteringBitmap( rEntry );
    getLeavingBitmap( rEntry );
    addSprites( rEntry );
}

void SlideChangeBase::viewRemoved( const UnoViewSharedPtr& rView )
{
    // we're a one-shot activity, and already finished
    if( mbFinished )
        return;

    // erase corresponding entry from maViewData
    maViewData.erase(
        std::remove_if(
            maViewData.begin(),
            maViewData.end(),
            boost::bind(
                std::equal_to<UnoViewSharedPtr>(),
                rView,
                // select view:
                boost::bind( &ViewEntry::getView, _1 ))),
        maViewData.end() );
}

void SlideChangeBase::viewChanged( const UnoViewSharedPtr& rView )
{
    // we're a one-shot activity, and already finished
    if( mbFinished )
        return;

    // find entry corresponding to modified view
    ViewsVecT::iterator aModifiedEntry(
        std::find_if(
            maViewData.begin(),
            maViewData.end(),
            boost::bind(
                std::equal_to<UnoViewSharedPtr>(),
                rView,
                // select view:
                boost::bind( &ViewEntry::getView, _1 ) )));

    OSL_ASSERT( aModifiedEntry != maViewData.end() );
    if( aModifiedEntry == maViewData.end() )
        return;

    // clear stale info (both bitmaps and sprites prolly need a
    // resize)
    clearViewEntry( *aModifiedEntry );
    addSprites( *aModifiedEntry );
}

void SlideChangeBase::viewsChanged()
{
    // we're a one-shot activity, and already finished
    if( mbFinished )
        return;

    ViewsVecT::iterator       aIter( maViewData.begin() );
    ViewsVecT::iterator const aEnd ( maViewData.end() );
    while( aIter != aEnd )
    {
        // clear stale info (both bitmaps and sprites prolly need a
        // resize)
        clearViewEntry( *aIter );
        addSprites( *aIter );

        ++aIter;
    }
}

cppcanvas::CustomSpriteSharedPtr SlideChangeBase::createSprite(
    UnoViewSharedPtr const & pView,
    basegfx::B2DSize const & rSpriteSize,
    double                   nPrio ) const
{
    // TODO(P2): change to bitmapsprite once that's working
    const cppcanvas::CustomSpriteSharedPtr pSprite(
        pView->createSprite( rSpriteSize,
                             nPrio ));

    // alpha default is 0.0, which seems to be
    // a bad idea when viewing content...
    pSprite->setAlpha( 1.0 );
    if (mbSpritesVisible)
        pSprite->show();

    return pSprite;
}

void SlideChangeBase::addSprites( ViewEntry& rEntry )
{
    if( mbCreateLeavingSprites && maLeavingSlide )
    {
        // create leaving sprite:
        const basegfx::B2ISize leavingSlideSizePixel(
            getLeavingBitmap( rEntry )->getSize() );

        rEntry.mpOutSprite = createSprite( rEntry.mpView,
                                           basegfx::B2DSize( leavingSlideSizePixel ),
                                           100 );
    }

    if( mbCreateEnteringSprites )
    {
        // create entering sprite:
        const basegfx::B2ISize enteringSlideSizePixel(
            getSlideSizePixel( basegfx::B2DSize( mpEnteringSlide->getSlideSize() ),
                               rEntry.mpView ));

        rEntry.mpInSprite = createSprite( rEntry.mpView,
                                          basegfx::B2DSize( enteringSlideSizePixel ),
                                          101 );
    }
}

void SlideChangeBase::clearViewEntry( ViewEntry& rEntry )
{
    // clear stale info (both bitmaps and sprites prolly need a
    // resize)
    rEntry.mpEnteringBitmap.reset();
    rEntry.mpLeavingBitmap.reset();
    rEntry.mpInSprite.reset();
    rEntry.mpOutSprite.reset();
}

} // namespace internal
} // namespace presentation

/* vim:set shiftwidth=4 softtabstop=4 expandtab: */