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 && (!defined(__WXGTK20__) || defined(__WXUNIVERSAL__))
  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 size_t wxAnimation::GetFrameCount() const
  55 {
  56     wxCHECK_MSG( IsOk(), 0, wxT("invalid animation") );
  57
  58     return M_ANIMDATA->GetFrameCount();
  59 }
  60
  61 wxImage wxAnimation::GetFrame(size_t 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(size_t i) const
  72 {
  73     wxCHECK_MSG( IsOk(), 0, wxT("invalid animation") );
  74
  75     return M_ANIMDATA->GetDelay(i);
  76 }
  77
  78 wxPoint wxAnimation::GetFramePosition(size_t frame) const
  79 {
  80     wxCHECK_MSG( IsOk(), wxDefaultPosition, wxT("invalid animation") );
  81
  82     return M_ANIMDATA->GetFramePosition(frame);
  83 }
  84
  85 wxSize wxAnimation::GetFrameSize(size_t frame) const
  86 {
  87     wxCHECK_MSG( IsOk(), wxDefaultSize, wxT("invalid animation") );
  88
  89     return M_ANIMDATA->GetFrameSize(frame);
  90 }
  91
  92 wxAnimationDisposal wxAnimation::GetDisposalMethod(size_t 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(size_t 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     // do a copy of the handler from the static list which we will own
 151     // as our reference data
 152     m_refData = handler->Clone();
 153
 154     if (handler == NULL)
 155     {
 156         wxLogWarning( _("No animation handler for type %ld defined."), type );
 157
 158         return false;
 159     }
 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( _T("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( _T("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     wxAnimation anim;
 311     if (!anim.LoadFile(filename, type) ||
 312         !anim.IsOk())
 313         return false;
 314
 315     SetAnimation(anim);
 316     return true;
 317 }
 318
 319 wxSize wxAnimationCtrl::DoGetBestSize() const
 320 {
 321     if (m_animation.IsOk() && !this->HasFlag(wxAC_NO_AUTORESIZE))
 322         return m_animation.GetSize();
 323
 324     return wxSize(100, 100);
 325 }
 326
 327 void wxAnimationCtrl::SetAnimation(const wxAnimation& animation)
 328 {
 329     if (IsPlaying())
 330         Stop();
 331
 332     // set new animation even if it's wxNullAnimation
 333     m_animation = animation;
 334     if (!m_animation.IsOk())
 335     {
 336         DisplayStaticImage();
 337         return;
 338     }
 339
 340     if (m_animation.GetBackgroundColour() == wxNullColour)
 341         SetUseWindowBackgroundColour();
 342     if (!this->HasFlag(wxAC_NO_AUTORESIZE))
 343         FitToAnimation();
 344
 345     DisplayStaticImage();
 346 }
 347
 348 void wxAnimationCtrl::SetInactiveBitmap(const wxBitmap &bmp)
 349 {
 350     // if the bitmap has an associated mask, we need to set our background to
 351     // the colour of our parent otherwise when calling DrawCurrentFrame()
 352     // (which uses the bitmap's mask), our background colour would be used for
 353     // transparent areas - and that's not what we want (at least for
 354     // consistency with the GTK version)
 355     if ( bmp.GetMask() != NULL && GetParent() != NULL )
 356         SetBackgroundColour(GetParent()->GetBackgroundColour());
 357
 358     wxAnimationCtrlBase::SetInactiveBitmap(bmp);
 359 }
 360
 361 void wxAnimationCtrl::FitToAnimation()
 362 {
 363     SetSize(m_animation.GetSize());
 364 }
 365
 366 bool wxAnimationCtrl::SetBackgroundColour(const wxColour& colour)
 367 {
 368     if ( !wxWindow::SetBackgroundColour(colour) )
 369         return false;
 370
 371     // if not playing, then this change must be seen immediately (unless
 372     // there's an inactive bitmap set which has higher priority than bg colour)
 373     if ( !IsPlaying() )
 374         DisplayStaticImage();
 375
 376     return true;
 377 }
 378
 379
 380 // ----------------------------------------------------------------------------
 381 // wxAnimationCtrl - stop/play methods
 382 // ----------------------------------------------------------------------------
 383
 384 void wxAnimationCtrl::Stop()
 385 {
 386     m_timer.Stop();
 387     m_isPlaying = false;
 388
 389     // reset frame counter
 390     m_currentFrame = 0;
 391
 392     DisplayStaticImage();
 393 }
 394
 395 bool wxAnimationCtrl::Play(bool looped)
 396 {
 397     if (!m_animation.IsOk())
 398         return false;
 399
 400     m_looped = looped;
 401     m_currentFrame = 0;
 402
 403     if (!RebuildBackingStoreUpToFrame(0))
 404         return false;
 405
 406     m_isPlaying = true;
 407
 408     // do a ClearBackground() to avoid that e.g. the custom static bitmap which
 409     // was eventually shown previously remains partially drawn
 410     ClearBackground();
 411
 412     // DrawCurrentFrame() will use our updated backing store
 413     wxClientDC clientDC(this);
 414     DrawCurrentFrame(clientDC);
 415
 416     // start the timer
 417     int delay = m_animation.GetDelay(0);
 418     if (delay == 0)
 419         delay = 1;      // 0 is invalid timeout for wxTimer.
 420     m_timer.Start(delay);
 421
 422     return true;
 423 }
 424
 425
 426
 427 // ----------------------------------------------------------------------------
 428 // wxAnimationCtrl - rendering methods
 429 // ----------------------------------------------------------------------------
 430
 431 bool wxAnimationCtrl::RebuildBackingStoreUpToFrame(size_t frame)
 432 {
 433     // if we've not created the backing store yet or it's too
 434     // small, then recreate it
 435     wxSize sz = m_animation.GetSize(),
 436            winsz = GetClientSize();
 437     int w = wxMin(sz.GetWidth(), winsz.GetWidth());
 438     int h = wxMin(sz.GetHeight(), winsz.GetHeight());
 439
 440     if ( !m_backingStore.IsOk() ||
 441             m_backingStore.GetWidth() < w || m_backingStore.GetHeight() < h )
 442     {
 443         if (!m_backingStore.Create(w, h))
 444             return false;
 445     }
 446
 447     wxMemoryDC dc;
 448     dc.SelectObject(m_backingStore);
 449
 450     // Draw the background
 451     DisposeToBackground(dc);
 452
 453     // Draw all intermediate frames that haven't been removed from the animation
 454     for (size_t i = 0; i < frame; i++)
 455     {
 456         if (m_animation.GetDisposalMethod(i) == wxANIM_DONOTREMOVE ||
 457             m_animation.GetDisposalMethod(i) == wxANIM_UNSPECIFIED)
 458         {
 459             DrawFrame(dc, i);
 460         }
 461         else if (m_animation.GetDisposalMethod(i) == wxANIM_TOBACKGROUND)
 462             DisposeToBackground(dc, m_animation.GetFramePosition(i),
 463                                     m_animation.GetFrameSize(i));
 464     }
 465
 466     // finally draw this frame
 467     DrawFrame(dc, frame);
 468     dc.SelectObject(wxNullBitmap);
 469
 470     return true;
 471 }
 472
 473 void wxAnimationCtrl::IncrementalUpdateBackingStore()
 474 {
 475     wxMemoryDC dc;
 476     dc.SelectObject(m_backingStore);
 477
 478     // OPTIMIZATION:
 479     // since wxAnimationCtrl can only play animations forward, without skipping
 480     // frames, we can be sure that m_backingStore contains the m_currentFrame-1
 481     // frame and thus we just need to dispose the m_currentFrame-1 frame and
 482     // render the m_currentFrame-th one.
 483
 484     if (m_currentFrame == 0)
 485     {
 486         // before drawing the first frame always dispose to bg colour
 487         DisposeToBackground(dc);
 488     }
 489     else
 490     {
 491         switch (m_animation.GetDisposalMethod(m_currentFrame-1))
 492         {
 493         case wxANIM_TOBACKGROUND:
 494             DisposeToBackground(dc, m_animation.GetFramePosition(m_currentFrame-1),
 495                                     m_animation.GetFrameSize(m_currentFrame-1));
 496             break;
 497
 498         case wxANIM_TOPREVIOUS:
 499             // this disposal should never be used too often.
 500             // E.g. GIF specification explicitely say to keep the usage of this
 501             //      disposal limited to the minimum.
 502             // In fact it may require a lot of time to restore
 503             if (m_currentFrame == 1)
 504             {
 505                 // if 0-th frame disposal is to restore to previous frame,
 506                 // the best we can do is to restore to background
 507                 DisposeToBackground(dc);
 508             }
 509             else
 510                 if (!RebuildBackingStoreUpToFrame(m_currentFrame-2))
 511                     Stop();
 512             break;
 513
 514         case wxANIM_DONOTREMOVE:
 515         case wxANIM_UNSPECIFIED:
 516             break;
 517         }
 518     }
 519
 520     // now just draw the current frame on the top of the backing store
 521     DrawFrame(dc, m_currentFrame);
 522     dc.SelectObject(wxNullBitmap);
 523 }
 524
 525 void wxAnimationCtrl::DisplayStaticImage()
 526 {
 527     wxASSERT(!IsPlaying());
 528
 529     // m_bmpStaticReal will be updated only if necessary...
 530     UpdateStaticImage();
 531
 532     if (m_bmpStaticReal.IsOk())
 533     {
 534         // copy the inactive bitmap in the backing store
 535         // eventually using the mask if the static bitmap has one
 536         if ( m_bmpStaticReal.GetMask() )
 537         {
 538             wxMemoryDC temp;
 539             temp.SelectObject(m_backingStore);
 540             DisposeToBackground(temp);
 541             temp.DrawBitmap(m_bmpStaticReal, 0, 0, true /* use mask */);
 542         }
 543         else
 544             m_backingStore = m_bmpStaticReal;
 545     }
 546     else
 547     {
 548         // put in the backing store the first frame of the animation
 549         if (!m_animation.IsOk() ||
 550             !RebuildBackingStoreUpToFrame(0))
 551         {
 552             m_animation = wxNullAnimation;
 553             DisposeToBackground();
 554         }
 555     }
 556
 557     Refresh();
 558 }
 559
 560 void wxAnimationCtrl::DrawFrame(wxDC &dc, size_t frame)
 561 {
 562     // PERFORMANCE NOTE:
 563     // this draw stuff is not as fast as possible: the wxAnimationDecoder
 564     // needs first to convert from its internal format to wxImage RGB24;
 565     // the wxImage is then converted as a wxBitmap and finally blitted.
 566     // If wxAnimationDecoder had a function to convert directly from its
 567     // internal format to a port-specific wxBitmap, it would be somewhat faster.
 568     wxBitmap bmp(m_animation.GetFrame(frame));
 569     dc.DrawBitmap(bmp, m_animation.GetFramePosition(frame),
 570                   true /* use mask */);
 571 }
 572
 573 void wxAnimationCtrl::DrawCurrentFrame(wxDC& dc)
 574 {
 575     wxASSERT( m_backingStore.IsOk() );
 576
 577     // m_backingStore always contains the current frame
 578     dc.DrawBitmap(m_backingStore, 0, 0, true /* use mask in case it's present */);
 579 }
 580
 581 void wxAnimationCtrl::DisposeToBackground()
 582 {
 583     // clear the backing store
 584     wxMemoryDC dc;
 585     dc.SelectObject(m_backingStore);
 586     if ( dc.IsOk() )
 587         DisposeToBackground(dc);
 588 }
 589
 590 void wxAnimationCtrl::DisposeToBackground(wxDC& dc)
 591 {
 592     wxColour col = IsUsingWindowBackgroundColour()
 593                     ? GetBackgroundColour()
 594                     : m_animation.GetBackgroundColour();
 595
 596     wxBrush brush(col);
 597     dc.SetBackground(brush);
 598     dc.Clear();
 599 }
 600
 601 void wxAnimationCtrl::DisposeToBackground(wxDC& dc, const wxPoint &pos, const wxSize &sz)
 602 {
 603     wxColour col = IsUsingWindowBackgroundColour()
 604                     ? GetBackgroundColour()
 605                     : m_animation.GetBackgroundColour();
 606     wxBrush brush(col);
 607     dc.SetBrush(brush);         // SetBrush and not SetBackground !!
 608     dc.SetPen(*wxTRANSPARENT_PEN);
 609     dc.DrawRectangle(pos, sz);
 610 }
 611
 612 // ----------------------------------------------------------------------------
 613 // wxAnimationCtrl - event handlers
 614 // ----------------------------------------------------------------------------
 615
 616 void wxAnimationCtrl::OnPaint(wxPaintEvent& WXUNUSED(event))
 617 {
 618     // VERY IMPORTANT: the wxPaintDC *must* be created in any case
 619     wxPaintDC dc(this);
 620
 621     if ( m_backingStore.IsOk() )
 622     {
 623         // NOTE: we draw the bitmap explicitely ignoring the mask (if any);
 624         //       i.e. we don't want to combine the backing store with the
 625         //       possibly wrong preexisting contents of the window!
 626         dc.DrawBitmap(m_backingStore, 0, 0, false /* no mask */);
 627     }
 628     else
 629     {
 630         // m_animation is not valid and thus we don't have a valid backing store...
 631         // clear then our area to the background colour
 632         DisposeToBackground(dc);
 633     }
 634 }
 635
 636 void wxAnimationCtrl::OnTimer(wxTimerEvent &WXUNUSED(event))
 637 {
 638     m_currentFrame++;
 639     if (m_currentFrame == m_animation.GetFrameCount())
 640     {
 641         // Should a non-looped animation display the last frame?
 642         if (!m_looped)
 643         {
 644             Stop();
 645             return;
 646         }
 647         else
 648             m_currentFrame = 0;     // let's restart
 649     }
 650
 651     IncrementalUpdateBackingStore();
 652
 653     wxClientDC dc(this);
 654     DrawCurrentFrame(dc);
 655
 656 #ifdef __WXMAC__
 657     // without this, the animation currently doesn't redraw under Mac
 658     Refresh();
 659 #endif // __WXMAC__
 660
 661     // Set the timer for the next frame
 662     int delay = m_animation.GetDelay(m_currentFrame);
 663     if (delay == 0)
 664         delay = 1;      // 0 is invalid timeout for wxTimer.
 665     m_timer.Start(delay);
 666 }
 667
 668 void wxAnimationCtrl::OnSize(wxSizeEvent &WXUNUSED(event))
 669 {
 670     // NB: resizing an animation control may take a lot of time
 671     //     for big animations as the backing store must be
 672     //     extended and rebuilt. Try to avoid it e.g. using
 673     //     a null proportion value for your wxAnimationCtrls
 674     //     when using them inside sizers.
 675     if (m_animation.IsOk())
 676     {
 677         // be careful to change the backing store *only* if we are
 678         // playing the animation as otherwise we may be displaying
 679         // the inactive bitmap and overwriting the backing store
 680         // with the last played frame is wrong in this case
 681         if (IsPlaying())
 682         {
 683             if (!RebuildBackingStoreUpToFrame(m_currentFrame))
 684                 Stop();     // in case we are playing
 685         }
 686     }
 687 }
 688
 689 #endif      // wxUSE_ANIMATIONCTRL
 690