src/generic/animateg.cpp

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