src/generic/animateg.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/generic/animateg.cpp
   3 // Purpose:     wxAnimation and wxAnimationCtrl
   4 // Author:      Julian Smart and Guillermo Rodriguez Garcia
   5 // Modified by: Francesco Montorsi
   6 // Created:     13/8/99
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart and Guillermo Rodriguez Garcia
   9 // Licence:     wxWindows licence
  10 ///////////////////////////////////////////////////////////////////////////////
  11
  12 #include "wx/wxprec.h"
  13
  14 #ifdef __BORLANDC__
  15   #pragma hdrstop
  16 #endif  //__BORLANDC__
  17
  18 #if wxUSE_ANIMATIONCTRL
  19
  20 #include "wx/animate.h"
  21
  22 #ifndef WX_PRECOMP
  23     #include "wx/log.h"
  24     #include "wx/image.h"
  25     #include "wx/dcmemory.h"
  26     #include "wx/dcclient.h"
  27     #include "wx/module.h"
  28 #endif
  29
  30 #include "wx/wfstream.h"
  31 #include "wx/gifdecod.h"
  32 #include "wx/anidecod.h"
  33
  34 #include "wx/listimpl.cpp"
  35 WX_DEFINE_LIST(wxAnimationDecoderList)
  36
  37 wxAnimationDecoderList wxAnimation::sm_handlers;
  38
  39
  40 // ----------------------------------------------------------------------------
  41 // wxAnimation
  42 // ----------------------------------------------------------------------------
  43
  44 IMPLEMENT_DYNAMIC_CLASS(wxAnimation, wxAnimationBase)
  45 #define M_ANIMDATA      static_cast<wxAnimationDecoder*>(m_refData)
  46
  47 wxSize wxAnimation::GetSize() const
  48 {
  49     wxCHECK_MSG( IsOk(), wxDefaultSize, wxT("invalid animation") );
  50
  51     return M_ANIMDATA->GetAnimationSize();
  52 }
  53
  54 unsigned int wxAnimation::GetFrameCount() const
  55 {
  56     wxCHECK_MSG( IsOk(), 0, wxT("invalid animation") );
  57
  58     return M_ANIMDATA->GetFrameCount();
  59 }
  60
  61 wxImage wxAnimation::GetFrame(unsigned int i) const
  62 {
  63     wxCHECK_MSG( IsOk(), wxNullImage, wxT("invalid animation") );
  64
  65     wxImage ret;
  66     if (!M_ANIMDATA->ConvertToImage(i, &ret))
  67         return wxNullImage;
  68     return ret;
  69 }
  70
  71 int wxAnimation::GetDelay(unsigned int i) const
  72 {
  73     wxCHECK_MSG( IsOk(), 0, wxT("invalid animation") );
  74
  75     return M_ANIMDATA->GetDelay(i);
  76 }
  77
  78 wxPoint wxAnimation::GetFramePosition(unsigned int frame) const
  79 {
  80     wxCHECK_MSG( IsOk(), wxDefaultPosition, wxT("invalid animation") );
  81
  82     return M_ANIMDATA->GetFramePosition(frame);
  83 }
  84
  85 wxSize wxAnimation::GetFrameSize(unsigned int frame) const
  86 {
  87     wxCHECK_MSG( IsOk(), wxDefaultSize, wxT("invalid animation") );
  88
  89     return M_ANIMDATA->GetFrameSize(frame);
  90 }
  91
  92 wxAnimationDisposal wxAnimation::GetDisposalMethod(unsigned int frame) const
  93 {
  94     wxCHECK_MSG( IsOk(), wxANIM_UNSPECIFIED, wxT("invalid animation") );
  95
  96     return M_ANIMDATA->GetDisposalMethod(frame);
  97 }
  98
  99 wxColour wxAnimation::GetTransparentColour(unsigned int frame) const
 100 {
 101     wxCHECK_MSG( IsOk(), wxNullColour, wxT("invalid animation") );
 102
 103     return M_ANIMDATA->GetTransparentColour(frame);
 104 }
 105
 106 wxColour wxAnimation::GetBackgroundColour() const
 107 {
 108     wxCHECK_MSG( IsOk(), wxNullColour, wxT("invalid animation") );
 109
 110     return M_ANIMDATA->GetBackgroundColour();
 111 }
 112
 113 bool wxAnimation::LoadFile(const wxString& filename, wxAnimationType type)
 114 {
 115     wxFileInputStream stream(filename);
 116     if ( !stream.IsOk() )
 117         return false;
 118
 119     return Load(stream, type);
 120 }
 121
 122 bool wxAnimation::Load(wxInputStream &stream, wxAnimationType type)
 123 {
 124     UnRef();
 125
 126     const wxAnimationDecoder *handler;
 127     if ( type == wxANIMATION_TYPE_ANY )
 128     {
 129         for ( wxAnimationDecoderList::compatibility_iterator node = sm_handlers.GetFirst();
 130               node; node = node->GetNext() )
 131         {
 132             handler=(const wxAnimationDecoder*)node->GetData();
 133
 134             if ( handler->CanRead(stream) )
 135             {
 136                 // do a copy of the handler from the static list which we will own
 137                 // as our reference data
 138                 m_refData = handler->Clone();
 139                 return M_ANIMDATA->Load(stream);
 140             }
 141         }
 142
 143         wxLogWarning( _("No handler found for animation type.") );
 144         return false;
 145     }
 146
 147     handler = FindHandler(type);
 148
 149     if (handler == NULL)
 150     {
 151         wxLogWarning( _("No animation handler for type %ld defined."), type );
 152
 153         return false;
 154     }
 155
 156
 157     // do a copy of the handler from the static list which we will own
 158     // as our reference data
 159     m_refData = handler->Clone();
 160
 161     if (stream.IsSeekable() && !M_ANIMDATA->CanRead(stream))
 162     {
 163         wxLogError(_("Animation file is not of type %ld."), type);
 164         return false;
 165     }
 166     else
 167         return M_ANIMDATA->Load(stream);
 168 }
 169
 170
 171 // ----------------------------------------------------------------------------
 172 // animation decoders
 173 // ----------------------------------------------------------------------------
 174
 175 void wxAnimation::AddHandler( wxAnimationDecoder *handler )
 176 {
 177     // Check for an existing handler of the type being added.
 178     if (FindHandler( handler->GetType() ) == 0)
 179     {
 180         sm_handlers.Append( handler );
 181     }
 182     else
 183     {
 184         // This is not documented behaviour, merely the simplest 'fix'
 185         // for preventing duplicate additions.  If someone ever has
 186         // a good reason to add and remove duplicate handlers (and they
 187         // may) we should probably refcount the duplicates.
 188
 189         wxLogDebug( wxT("Adding duplicate animation handler for '%d' type"),
 190                     handler->GetType() );
 191         delete handler;
 192     }
 193 }
 194
 195 void wxAnimation::InsertHandler( wxAnimationDecoder *handler )
 196 {
 197     // Check for an existing handler of the type being added.
 198     if (FindHandler( handler->GetType() ) == 0)
 199     {
 200         sm_handlers.Insert( handler );
 201     }
 202     else
 203     {
 204         // see AddHandler for additional comments.
 205         wxLogDebug( wxT("Inserting duplicate animation handler for '%d' type"),
 206                     handler->GetType() );
 207         delete handler;
 208     }
 209 }
 210
 211 const wxAnimationDecoder *wxAnimation::FindHandler( wxAnimationType animType )
 212 {
 213     wxAnimationDecoderList::compatibility_iterator node = sm_handlers.GetFirst();
 214     while (node)
 215     {
 216         const wxAnimationDecoder *handler = (const wxAnimationDecoder *)node->GetData();
 217         if (handler->GetType() == animType) return handler;
 218         node = node->GetNext();
 219     }
 220     return 0;
 221 }
 222
 223 void wxAnimation::InitStandardHandlers()
 224 {
 225 #if wxUSE_GIF
 226     AddHandler(new wxGIFDecoder);
 227 #endif // wxUSE_GIF
 228 #if wxUSE_ICO_CUR
 229     AddHandler(new wxANIDecoder);
 230 #endif // wxUSE_ICO_CUR
 231 }
 232
 233 void wxAnimation::CleanUpHandlers()
 234 {
 235     wxAnimationDecoderList::compatibility_iterator node = sm_handlers.GetFirst();
 236     while (node)
 237     {
 238         wxAnimationDecoder *handler = (wxAnimationDecoder *)node->GetData();
 239         wxAnimationDecoderList::compatibility_iterator next = node->GetNext();
 240         delete handler;
 241         node = next;
 242     }
 243
 244     sm_handlers.Clear();
 245 }
 246
 247
 248 // A module to allow wxAnimation initialization/cleanup
 249 // without calling these functions from app.cpp or from
 250 // the user's application.
 251
 252 class wxAnimationModule: public wxModule
 253 {
 254 DECLARE_DYNAMIC_CLASS(wxAnimationModule)
 255 public:
 256     wxAnimationModule() {}
 257     bool OnInit() { wxAnimation::InitStandardHandlers(); return true; }
 258     void OnExit() { wxAnimation::CleanUpHandlers(); }
 259 };
 260
 261 IMPLEMENT_DYNAMIC_CLASS(wxAnimationModule, wxModule)
 262
 263
 264 // ----------------------------------------------------------------------------
 265 // wxAnimationCtrl
 266 // ----------------------------------------------------------------------------
 267
 268 IMPLEMENT_CLASS(wxAnimationCtrl, wxAnimationCtrlBase)
 269 BEGIN_EVENT_TABLE(wxAnimationCtrl, wxAnimationCtrlBase)
 270     EVT_PAINT(wxAnimationCtrl::OnPaint)
 271     EVT_SIZE(wxAnimationCtrl::OnSize)
 272     EVT_TIMER(wxID_ANY, wxAnimationCtrl::OnTimer)
 273 END_EVENT_TABLE()
 274
 275 void wxAnimationCtrl::Init()
 276 {
 277     m_currentFrame = 0;
 278     m_looped = false;
 279     m_isPlaying = false;
 280
 281     // use the window background colour by default to be consistent
 282     // with the GTK+ native version
 283     m_useWinBackgroundColour = true;
 284 }
 285
 286 bool wxAnimationCtrl::Create(wxWindow *parent, wxWindowID id,
 287             const wxAnimation& animation, const wxPoint& pos,
 288             const wxSize& size, long style, const wxString& name)
 289 {
 290     m_timer.SetOwner(this);
 291
 292     if (!base_type::Create(parent, id, pos, size, style, wxDefaultValidator, name))
 293         return false;
 294
 295     // by default we get the same background colour of our parent
 296     SetBackgroundColour(parent->GetBackgroundColour());
 297
 298     SetAnimation(animation);
 299
 300     return true;
 301 }
 302
 303 wxAnimationCtrl::~wxAnimationCtrl()
 304 {
 305     Stop();
 306 }
 307
 308 bool wxAnimationCtrl::LoadFile(const wxString& filename, wxAnimationType type)
 309 {
 310     wxFileInputStream fis(filename);
 311     if (!fis.IsOk())
 312         return false;
 313     return Load(fis, type);
 314 }
 315
 316 bool wxAnimationCtrl::Load(wxInputStream& stream, wxAnimationType type)
 317 {
 318     wxAnimation anim;
 319     if ( !anim.Load(stream, type) || !anim.IsOk() )
 320         return false;
 321
 322     SetAnimation(anim);
 323     return true;
 324 }
 325
 326 wxSize wxAnimationCtrl::DoGetBestSize() const
 327 {
 328     if (m_animation.IsOk() && !this->HasFlag(wxAC_NO_AUTORESIZE))
 329         return m_animation.GetSize();
 330
 331     return wxSize(100, 100);
 332 }
 333
 334 void wxAnimationCtrl::SetAnimation(const wxAnimation& animation)
 335 {
 336     if (IsPlaying())
 337         Stop();
 338
 339     // set new animation even if it's wxNullAnimation
 340     m_animation = animation;
 341     if (!m_animation.IsOk())
 342     {
 343         DisplayStaticImage();
 344         return;
 345     }
 346
 347     if (m_animation.GetBackgroundColour() == wxNullColour)
 348         SetUseWindowBackgroundColour();
 349     if (!this->HasFlag(wxAC_NO_AUTORESIZE))
 350         FitToAnimation();
 351
 352     DisplayStaticImage();
 353 }
 354
 355 void wxAnimationCtrl::SetInactiveBitmap(const wxBitmap &bmp)
 356 {
 357     // if the bitmap has an associated mask, we need to set our background to
 358     // the colour of our parent otherwise when calling DrawCurrentFrame()
 359     // (which uses the bitmap's mask), our background colour would be used for
 360     // transparent areas - and that's not what we want (at least for
 361     // consistency with the GTK version)
 362     if ( bmp.GetMask() != NULL && GetParent() != NULL )
 363         SetBackgroundColour(GetParent()->GetBackgroundColour());
 364
 365     wxAnimationCtrlBase::SetInactiveBitmap(bmp);
 366 }
 367
 368 void wxAnimationCtrl::FitToAnimation()
 369 {
 370     SetSize(m_animation.GetSize());
 371 }
 372
 373 bool wxAnimationCtrl::SetBackgroundColour(const wxColour& colour)
 374 {
 375     if ( !wxWindow::SetBackgroundColour(colour) )
 376         return false;
 377
 378     // if not playing, then this change must be seen immediately (unless
 379     // there's an inactive bitmap set which has higher priority than bg colour)
 380     if ( !IsPlaying() )
 381         DisplayStaticImage();
 382
 383     return true;
 384 }
 385
 386
 387 // ----------------------------------------------------------------------------
 388 // wxAnimationCtrl - stop/play methods
 389 // ----------------------------------------------------------------------------
 390
 391 void wxAnimationCtrl::Stop()
 392 {
 393     m_timer.Stop();
 394     m_isPlaying = false;
 395
 396     // reset frame counter
 397     m_currentFrame = 0;
 398
 399     DisplayStaticImage();
 400 }
 401
 402 bool wxAnimationCtrl::Play(bool looped)
 403 {
 404     if (!m_animation.IsOk())
 405         return false;
 406
 407     m_looped = looped;
 408     m_currentFrame = 0;
 409
 410     if (!RebuildBackingStoreUpToFrame(0))
 411         return false;
 412
 413     m_isPlaying = true;
 414
 415     // do a ClearBackground() to avoid that e.g. the custom static bitmap which
 416     // was eventually shown previously remains partially drawn
 417     ClearBackground();
 418
 419     // DrawCurrentFrame() will use our updated backing store
 420     wxClientDC clientDC(this);
 421     DrawCurrentFrame(clientDC);
 422
 423     // start the timer
 424     int delay = m_animation.GetDelay(0);
 425     if (delay == 0)
 426         delay = 1;      // 0 is invalid timeout for wxTimer.
 427     m_timer.Start(delay, true);
 428
 429     return true;
 430 }
 431
 432
 433
 434 // ----------------------------------------------------------------------------
 435 // wxAnimationCtrl - rendering methods
 436 // ----------------------------------------------------------------------------
 437
 438 bool wxAnimationCtrl::RebuildBackingStoreUpToFrame(unsigned int frame)
 439 {
 440     // if we've not created the backing store yet or it's too
 441     // small, then recreate it
 442     wxSize sz = m_animation.GetSize(),
 443            winsz = GetClientSize();
 444     int w = wxMin(sz.GetWidth(), winsz.GetWidth());
 445     int h = wxMin(sz.GetHeight(), winsz.GetHeight());
 446
 447     if ( !m_backingStore.IsOk() ||
 448             m_backingStore.GetWidth() < w || m_backingStore.GetHeight() < h )
 449     {
 450         if (!m_backingStore.Create(w, h))
 451             return false;
 452     }
 453
 454     wxMemoryDC dc;
 455     dc.SelectObject(m_backingStore);
 456
 457     // Draw the background
 458     DisposeToBackground(dc);
 459
 460     // Draw all intermediate frames that haven't been removed from the animation
 461     for (unsigned int i = 0; i < frame; i++)
 462     {
 463         if (m_animation.GetDisposalMethod(i) == wxANIM_DONOTREMOVE ||
 464             m_animation.GetDisposalMethod(i) == wxANIM_UNSPECIFIED)
 465         {
 466             DrawFrame(dc, i);
 467         }
 468         else if (m_animation.GetDisposalMethod(i) == wxANIM_TOBACKGROUND)
 469             DisposeToBackground(dc, m_animation.GetFramePosition(i),
 470                                     m_animation.GetFrameSize(i));
 471     }
 472
 473     // finally draw this frame
 474     DrawFrame(dc, frame);
 475     dc.SelectObject(wxNullBitmap);
 476
 477     return true;
 478 }
 479
 480 void wxAnimationCtrl::IncrementalUpdateBackingStore()
 481 {
 482     wxMemoryDC dc;
 483     dc.SelectObject(m_backingStore);
 484
 485     // OPTIMIZATION:
 486     // since wxAnimationCtrl can only play animations forward, without skipping
 487     // frames, we can be sure that m_backingStore contains the m_currentFrame-1
 488     // frame and thus we just need to dispose the m_currentFrame-1 frame and
 489     // render the m_currentFrame-th one.
 490
 491     if (m_currentFrame == 0)
 492     {
 493         // before drawing the first frame always dispose to bg colour
 494         DisposeToBackground(dc);
 495     }
 496     else
 497     {
 498         switch (m_animation.GetDisposalMethod(m_currentFrame-1))
 499         {
 500         case wxANIM_TOBACKGROUND:
 501             DisposeToBackground(dc, m_animation.GetFramePosition(m_currentFrame-1),
 502                                     m_animation.GetFrameSize(m_currentFrame-1));
 503             break;
 504
 505         case wxANIM_TOPREVIOUS:
 506             // this disposal should never be used too often.
 507             // E.g. GIF specification explicitly say to keep the usage of this
 508             //      disposal limited to the minimum.
 509             // In fact it may require a lot of time to restore
 510             if (m_currentFrame == 1)
 511             {
 512                 // if 0-th frame disposal is to restore to previous frame,
 513                 // the best we can do is to restore to background
 514                 DisposeToBackground(dc);
 515             }
 516             else
 517                 if (!RebuildBackingStoreUpToFrame(m_currentFrame-2))
 518                     Stop();
 519             break;
 520
 521         case wxANIM_DONOTREMOVE:
 522         case wxANIM_UNSPECIFIED:
 523             break;
 524         }
 525     }
 526
 527     // now just draw the current frame on the top of the backing store
 528     DrawFrame(dc, m_currentFrame);
 529     dc.SelectObject(wxNullBitmap);
 530 }
 531
 532 void wxAnimationCtrl::DisplayStaticImage()
 533 {
 534     wxASSERT(!IsPlaying());
 535
 536     // m_bmpStaticReal will be updated only if necessary...
 537     UpdateStaticImage();
 538
 539     if (m_bmpStaticReal.IsOk())
 540     {
 541         // copy the inactive bitmap in the backing store
 542         // eventually using the mask if the static bitmap has one
 543         if ( m_bmpStaticReal.GetMask() )
 544         {
 545             wxMemoryDC temp;
 546             temp.SelectObject(m_backingStore);
 547             DisposeToBackground(temp);
 548             temp.DrawBitmap(m_bmpStaticReal, 0, 0, true /* use mask */);
 549         }
 550         else
 551             m_backingStore = m_bmpStaticReal;
 552     }
 553     else
 554     {
 555         // put in the backing store the first frame of the animation
 556         if (!m_animation.IsOk() ||
 557             !RebuildBackingStoreUpToFrame(0))
 558         {
 559             m_animation = wxNullAnimation;
 560             DisposeToBackground();
 561         }
 562     }
 563
 564     Refresh();
 565 }
 566
 567 void wxAnimationCtrl::DrawFrame(wxDC &dc, unsigned int frame)
 568 {
 569     // PERFORMANCE NOTE:
 570     // this draw stuff is not as fast as possible: the wxAnimationDecoder
 571     // needs first to convert from its internal format to wxImage RGB24;
 572     // the wxImage is then converted as a wxBitmap and finally blitted.
 573     // If wxAnimationDecoder had a function to convert directly from its
 574     // internal format to a port-specific wxBitmap, it would be somewhat faster.
 575     wxBitmap bmp(m_animation.GetFrame(frame));
 576     dc.DrawBitmap(bmp, m_animation.GetFramePosition(frame),
 577                   true /* use mask */);
 578 }
 579
 580 void wxAnimationCtrl::DrawCurrentFrame(wxDC& dc)
 581 {
 582     wxASSERT( m_backingStore.IsOk() );
 583
 584     // m_backingStore always contains the current frame
 585     dc.DrawBitmap(m_backingStore, 0, 0, true /* use mask in case it's present */);
 586 }
 587
 588 void wxAnimationCtrl::DisposeToBackground()
 589 {
 590     // clear the backing store
 591     wxMemoryDC dc;
 592     dc.SelectObject(m_backingStore);
 593     if ( dc.IsOk() )
 594         DisposeToBackground(dc);
 595 }
 596
 597 void wxAnimationCtrl::DisposeToBackground(wxDC& dc)
 598 {
 599     wxColour col = IsUsingWindowBackgroundColour()
 600                     ? GetBackgroundColour()
 601                     : m_animation.GetBackgroundColour();
 602
 603     wxBrush brush(col);
 604     dc.SetBackground(brush);
 605     dc.Clear();
 606 }
 607
 608 void wxAnimationCtrl::DisposeToBackground(wxDC& dc, const wxPoint &pos, const wxSize &sz)
 609 {
 610     wxColour col = IsUsingWindowBackgroundColour()
 611                     ? GetBackgroundColour()
 612                     : m_animation.GetBackgroundColour();
 613     wxBrush brush(col);
 614     dc.SetBrush(brush);         // SetBrush and not SetBackground !!
 615     dc.SetPen(*wxTRANSPARENT_PEN);
 616     dc.DrawRectangle(pos, sz);
 617 }
 618
 619 // ----------------------------------------------------------------------------
 620 // wxAnimationCtrl - event handlers
 621 // ----------------------------------------------------------------------------
 622
 623 void wxAnimationCtrl::OnPaint(wxPaintEvent& WXUNUSED(event))
 624 {
 625     // VERY IMPORTANT: the wxPaintDC *must* be created in any case
 626     wxPaintDC dc(this);
 627
 628     if ( m_backingStore.IsOk() )
 629     {
 630         // NOTE: we draw the bitmap explicitly ignoring the mask (if any);
 631         //       i.e. we don't want to combine the backing store with the
 632         //       possibly wrong preexisting contents of the window!
 633         dc.DrawBitmap(m_backingStore, 0, 0, false /* no mask */);
 634     }
 635     else
 636     {
 637         // m_animation is not valid and thus we don't have a valid backing store...
 638         // clear then our area to the background colour
 639         DisposeToBackground(dc);
 640     }
 641 }
 642
 643 void wxAnimationCtrl::OnTimer(wxTimerEvent &WXUNUSED(event))
 644 {
 645     m_currentFrame++;
 646     if (m_currentFrame == m_animation.GetFrameCount())
 647     {
 648         // Should a non-looped animation display the last frame?
 649         if (!m_looped)
 650         {
 651             Stop();
 652             return;
 653         }
 654         else
 655             m_currentFrame = 0;     // let's restart
 656     }
 657
 658     IncrementalUpdateBackingStore();
 659
 660     wxClientDC dc(this);
 661     DrawCurrentFrame(dc);
 662
 663 #ifdef __WXMAC__
 664     // without this, the animation currently doesn't redraw under Mac
 665     Refresh();
 666 #endif // __WXMAC__
 667
 668     // Set the timer for the next frame
 669     int delay = m_animation.GetDelay(m_currentFrame);
 670     if (delay == 0)
 671         delay = 1;      // 0 is invalid timeout for wxTimer.
 672     m_timer.Start(delay, true);
 673 }
 674
 675 void wxAnimationCtrl::OnSize(wxSizeEvent &WXUNUSED(event))
 676 {
 677     // NB: resizing an animation control may take a lot of time
 678     //     for big animations as the backing store must be
 679     //     extended and rebuilt. Try to avoid it e.g. using
 680     //     a null proportion value for your wxAnimationCtrls
 681     //     when using them inside sizers.
 682     if (m_animation.IsOk())
 683     {
 684         // be careful to change the backing store *only* if we are
 685         // playing the animation as otherwise we may be displaying
 686         // the inactive bitmap and overwriting the backing store
 687         // with the last played frame is wrong in this case
 688         if (IsPlaying())
 689         {
 690             if (!RebuildBackingStoreUpToFrame(m_currentFrame))
 691                 Stop();     // in case we are playing
 692         }
 693     }
 694 }
 695
 696 #endif // wxUSE_ANIMATIONCTRL
 697