src/gtk/glcanvas.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/gtk/glcanvas.cpp
   3 // Purpose:     wxGLCanvas, for using OpenGL/Mesa with wxWidgets and GTK
   4 // Author:      Robert Roebling
   5 // Modified by:
   6 // Created:     17/08/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Robert Roebling
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // For compilers that support precompilation, includes "wx.h".
  13 #include "wx/wxprec.h"
  14
  15 #if wxUSE_GLCANVAS
  16
  17 #include "wx/glcanvas.h"
  18
  19 #ifndef WX_PRECOMP
  20     #include "wx/app.h"
  21     #include "wx/frame.h"
  22 #endif // WX_PRECOMP
  23
  24 #include "wx/colour.h"
  25 #include "wx/module.h"
  26
  27 extern "C"
  28 {
  29 #include "gtk/gtk.h"
  30 #include "gdk/gdk.h"
  31 #include "gdk/gdkx.h"
  32 }
  33
  34 #include "wx/gtk/win_gtk.h"
  35 #include "wx/gtk/private.h"
  36
  37 // DLL options compatibility check:
  38 #include "wx/build.h"
  39 WX_CHECK_BUILD_OPTIONS("wxGL")
  40
  41
  42 //---------------------------------------------------------------------------
  43 // static variables
  44 //---------------------------------------------------------------------------
  45 int wxGLCanvas::m_glxVersion = 0;
  46
  47 //---------------------------------------------------------------------------
  48 // global data
  49 //---------------------------------------------------------------------------
  50
  51 XVisualInfo *g_vi = (XVisualInfo*) NULL;
  52
  53 //---------------------------------------------------------------------------
  54 // wxGLContext
  55 //---------------------------------------------------------------------------
  56
  57 IMPLEMENT_CLASS(wxGLContext,wxObject)
  58
  59 wxGLContext::wxGLContext( bool WXUNUSED(isRGB), wxWindow *win, const wxPalette& WXUNUSED(palette) )
  60 {
  61     m_window = win;
  62     m_widget = win->m_wxwindow;
  63
  64     wxGLCanvas *gc = (wxGLCanvas*) win;
  65
  66     if (wxGLCanvas::GetGLXVersion() >= 13)
  67     {
  68         // GLX >= 1.3
  69         GLXFBConfig *fbc = gc->m_fbc;
  70         wxCHECK_RET( fbc, _T("invalid GLXFBConfig for OpenGl") );
  71         m_glContext = glXCreateNewContext( GDK_DISPLAY(), fbc[0], GLX_RGBA_TYPE, None, GL_TRUE );
  72     }
  73     else
  74     {
  75         // GLX <= 1.2
  76         XVisualInfo *vi = (XVisualInfo *) gc->m_vi;
  77         wxCHECK_RET( vi, _T("invalid visual for OpenGl") );
  78         m_glContext = glXCreateContext( GDK_DISPLAY(), vi, None, GL_TRUE );
  79     }
  80
  81     wxCHECK_RET( m_glContext, _T("Couldn't create OpenGl context") );
  82 }
  83
  84 wxGLContext::wxGLContext(
  85                bool WXUNUSED(isRGB), wxWindow *win,
  86                const wxPalette& WXUNUSED(palette),
  87                const wxGLContext *other        /* for sharing display lists */
  88 )
  89 {
  90     m_window = win;
  91     m_widget = win->m_wxwindow;
  92
  93     wxGLCanvas *gc = (wxGLCanvas*) win;
  94
  95     if (wxGLCanvas::GetGLXVersion() >= 13)
  96     {
  97         // GLX >= 1.3
  98         GLXFBConfig *fbc = gc->m_fbc;
  99         wxCHECK_RET( fbc, _T("invalid GLXFBConfig for OpenGl") );
 100         m_glContext = glXCreateNewContext( GDK_DISPLAY(), fbc[0], GLX_RGBA_TYPE,
 101                                            other ? other->m_glContext : None,
 102                                            GL_TRUE );
 103     }
 104     else
 105     {
 106         // GLX <= 1.2
 107         XVisualInfo *vi = (XVisualInfo *) gc->m_vi;
 108         wxCHECK_RET( vi, _T("invalid visual for OpenGl") );
 109         m_glContext = glXCreateContext( GDK_DISPLAY(), vi,
 110                                         other ? other->m_glContext : None,
 111                                         GL_TRUE );
 112     }
 113
 114     if ( !m_glContext )
 115     {
 116         wxFAIL_MSG( _T("Couldn't create OpenGl context") );
 117     }
 118 }
 119
 120 wxGLContext::~wxGLContext()
 121 {
 122     if (!m_glContext) return;
 123
 124     if (m_glContext == glXGetCurrentContext())
 125     {
 126         if (wxGLCanvas::GetGLXVersion() >= 13)
 127             // GLX >= 1.3
 128             glXMakeContextCurrent( GDK_DISPLAY(), None, None, NULL);
 129         else
 130             // GLX <= 1.2
 131             glXMakeCurrent( GDK_DISPLAY(), None, NULL);
 132     }
 133
 134     glXDestroyContext( GDK_DISPLAY(), m_glContext );
 135 }
 136
 137 void wxGLContext::SwapBuffers()
 138 {
 139     if (m_glContext)
 140     {
 141         GdkWindow *window = GTK_PIZZA(m_widget)->bin_window;
 142         glXSwapBuffers( GDK_DISPLAY(), GDK_WINDOW_XWINDOW( window ) );
 143     }
 144 }
 145
 146 void wxGLContext::SetCurrent()
 147 {
 148     if (m_glContext)
 149     {
 150         GdkWindow *window = GTK_PIZZA(m_widget)->bin_window;
 151
 152         if (wxGLCanvas::GetGLXVersion() >= 13)
 153             // GLX >= 1.3
 154             glXMakeContextCurrent( GDK_DISPLAY(), GDK_WINDOW_XWINDOW(window),
 155                                    GDK_WINDOW_XWINDOW(window), m_glContext );
 156         else
 157             // GLX <= 1.2
 158             glXMakeCurrent( GDK_DISPLAY(), GDK_WINDOW_XWINDOW(window), m_glContext );
 159     }
 160 }
 161
 162 void wxGLContext::SetColour(const wxChar *colour)
 163 {
 164     wxColour col = wxTheColourDatabase->Find(colour);
 165     if (col.Ok())
 166     {
 167         float r = (float)(col.Red()/256.0);
 168         float g = (float)(col.Green()/256.0);
 169         float b = (float)(col.Blue()/256.0);
 170         glColor3f( r, g, b);
 171     }
 172 }
 173
 174 void wxGLContext::SetupPixelFormat()
 175 {
 176 }
 177
 178 void wxGLContext::SetupPalette( const wxPalette& WXUNUSED(palette) )
 179 {
 180 }
 181
 182 wxPalette wxGLContext::CreateDefaultPalette()
 183 {
 184     return wxNullPalette;
 185 }
 186
 187 //-----------------------------------------------------------------------------
 188 // "realize" from m_wxwindow
 189 //-----------------------------------------------------------------------------
 190
 191 extern "C" {
 192 static gint
 193 gtk_glwindow_realized_callback( GtkWidget *WXUNUSED(widget), wxGLCanvas *win )
 194 {
 195     if ( !win->m_glContext )
 196     {
 197         wxGLContext *share = win->m_sharedContext;
 198         if ( !share && win->m_sharedContextOf )
 199             share = win->m_sharedContextOf->GetContext();
 200
 201         win->m_glContext = new wxGLContext( TRUE, win, wxNullPalette, share );
 202     }
 203
 204     return FALSE;
 205 }
 206 }
 207
 208 //-----------------------------------------------------------------------------
 209 // "map" from m_wxwindow
 210 //-----------------------------------------------------------------------------
 211
 212 extern "C" {
 213 static gint
 214 gtk_glwindow_map_callback( GtkWidget * WXUNUSED(widget), wxGLCanvas *win )
 215 {
 216     if (win->m_glContext/* && win->m_exposed*/)
 217     {
 218         wxPaintEvent event( win->GetId() );
 219         event.SetEventObject( win );
 220         win->GetEventHandler()->ProcessEvent( event );
 221
 222         win->m_exposed = false;
 223         win->GetUpdateRegion().Clear();
 224     }
 225
 226     return FALSE;
 227 }
 228 }
 229
 230 //-----------------------------------------------------------------------------
 231 // "expose_event" of m_wxwindow
 232 //-----------------------------------------------------------------------------
 233
 234 extern "C" {
 235 static void
 236 gtk_glwindow_expose_callback( GtkWidget *WXUNUSED(widget), GdkEventExpose *gdk_event, wxGLCanvas *win )
 237 {
 238     if (g_isIdle)
 239         wxapp_install_idle_handler();
 240
 241     win->m_exposed = true;
 242
 243     win->GetUpdateRegion().Union( gdk_event->area.x,
 244                                   gdk_event->area.y,
 245                                   gdk_event->area.width,
 246                                   gdk_event->area.height );
 247 }
 248 }
 249
 250 //-----------------------------------------------------------------------------
 251 // "size_allocate" of m_wxwindow
 252 //-----------------------------------------------------------------------------
 253
 254 extern "C" {
 255 static void
 256 gtk_glcanvas_size_callback( GtkWidget *WXUNUSED(widget), GtkAllocation* alloc, wxGLCanvas *win )
 257 {
 258     if (g_isIdle)
 259         wxapp_install_idle_handler();
 260
 261     if (!win->m_hasVMT)
 262         return;
 263
 264     wxSizeEvent event( wxSize(win->m_width,win->m_height), win->GetId() );
 265     event.SetEventObject( win );
 266     win->GetEventHandler()->ProcessEvent( event );
 267 }
 268 }
 269
 270 //---------------------------------------------------------------------------
 271 // wxGlCanvas
 272 //---------------------------------------------------------------------------
 273
 274 IMPLEMENT_CLASS(wxGLCanvas, wxWindow)
 275
 276 BEGIN_EVENT_TABLE(wxGLCanvas, wxWindow)
 277     EVT_SIZE(wxGLCanvas::OnSize)
 278 END_EVENT_TABLE()
 279
 280 wxGLCanvas::wxGLCanvas( wxWindow *parent, wxWindowID id,
 281                         const wxPoint& pos, const wxSize& size,
 282                         long style, const wxString& name,
 283                         int *attribList,
 284                         const wxPalette& palette )
 285 {
 286     Create( parent, NULL, NULL, id, pos, size, style, name, attribList, palette );
 287 }
 288
 289 wxGLCanvas::wxGLCanvas( wxWindow *parent,
 290                         const wxGLContext *shared,
 291                         wxWindowID id,
 292                         const wxPoint& pos, const wxSize& size,
 293                         long style, const wxString& name,
 294                         int *attribList,
 295                         const wxPalette& palette )
 296 {
 297     Create( parent, shared, NULL, id, pos, size, style, name, attribList, palette );
 298 }
 299
 300 wxGLCanvas::wxGLCanvas( wxWindow *parent,
 301                         const wxGLCanvas *shared,
 302                         wxWindowID id,
 303                         const wxPoint& pos, const wxSize& size,
 304                         long style, const wxString& name,
 305                         int *attribList,
 306                         const wxPalette& palette )
 307 {
 308     Create( parent, NULL, shared, id, pos, size, style, name, attribList, palette );
 309 }
 310
 311 bool wxGLCanvas::Create( wxWindow *parent,
 312                          const wxGLContext *shared,
 313                          const wxGLCanvas *shared_context_of,
 314                          wxWindowID id,
 315                          const wxPoint& pos, const wxSize& size,
 316                          long style, const wxString& name,
 317                          int *attribList,
 318                          const wxPalette& palette)
 319 {
 320     m_sharedContext = (wxGLContext*)shared;  // const_cast
 321     m_sharedContextOf = (wxGLCanvas*)shared_context_of;  // const_cast
 322     m_glContext = (wxGLContext*) NULL;
 323
 324     m_exposed = false;
 325     m_noExpose = true;
 326     m_nativeSizeEvent = true;
 327     m_fbc = NULL;
 328     m_vi = NULL;
 329
 330     // to be sure the glx version is known
 331     wxGLCanvas::QueryGLXVersion();
 332
 333     if (wxGLCanvas::GetGLXVersion() >= 13)
 334     {
 335         // GLX >= 1.3 uses a GLXFBConfig
 336         GLXFBConfig * fbc = NULL;
 337         if (wxTheApp->m_glFBCInfo != NULL)
 338         {
 339             fbc = (GLXFBConfig *) wxTheApp->m_glFBCInfo;
 340             m_canFreeFBC = false; // owned by wxTheApp - don't free upon destruction
 341         }
 342         else
 343         {
 344             fbc = (GLXFBConfig *) wxGLCanvas::ChooseGLFBC(attribList);
 345             m_canFreeFBC = true;
 346         }
 347         m_fbc = fbc;  // save for later use
 348         wxCHECK_MSG( m_fbc, false, _T("required FBConfig couldn't be found") );
 349     }
 350
 351     XVisualInfo *vi = NULL;
 352     if (wxTheApp->m_glVisualInfo != NULL)
 353     {
 354         vi = (XVisualInfo *)wxTheApp->m_glVisualInfo;
 355         m_canFreeVi = false; // owned by wxTheApp - don't free upon destruction
 356     }
 357     else
 358     {
 359         if (wxGLCanvas::GetGLXVersion() >= 13)
 360         // GLX >= 1.3
 361             vi = glXGetVisualFromFBConfig(GDK_DISPLAY(), m_fbc[0]);
 362         else
 363             // GLX <= 1.2
 364             vi = (XVisualInfo *) ChooseGLVisual(attribList);
 365
 366         m_canFreeVi = true;
 367     }
 368
 369     m_vi = vi;  // save for later use
 370
 371     wxCHECK_MSG( m_vi, false, _T("required visual couldn't be found") );
 372     GdkVisual *visual;
 373     GdkColormap *colormap;
 374
 375     // MR: This needs a fix for lower gtk+ versions too. Might need to rethink logic (FIXME)
 376 #if defined(__WXGTK20__) && GTK_CHECK_VERSION(2,2,0)
 377     if (!gtk_check_version(2,2,0))
 378     {
 379         wxWindow::Create( parent, id, pos, size, style, name );
 380
 381         m_glWidget = m_wxwindow;
 382
 383         GdkScreen *screen = gtk_widget_get_screen( m_glWidget );
 384         colormap = gdk_screen_get_default_colormap(screen);
 385         visual = gdk_colormap_get_visual(colormap);
 386
 387         if (GDK_VISUAL_XVISUAL(visual)->visualid != vi->visualid)
 388         {
 389             visual = gdk_x11_screen_lookup_visual( screen, vi->visualid );
 390             colormap = gdk_colormap_new(visual, FALSE);
 391         }
 392
 393         gtk_widget_set_colormap( m_glWidget, colormap );
 394     }
 395     else
 396 #endif
 397     {
 398         visual = gdkx_visual_get( vi->visualid );
 399         colormap = gdk_colormap_new( visual, TRUE );
 400
 401         gtk_widget_push_colormap( colormap );
 402
 403         wxWindow::Create( parent, id, pos, size, style, name );
 404         m_glWidget = m_wxwindow;
 405     }
 406
 407     gtk_widget_set_double_buffered( m_glWidget, FALSE );
 408
 409     g_signal_connect (m_wxwindow, "realize",
 410                       G_CALLBACK (gtk_glwindow_realized_callback),
 411                       this);
 412     g_signal_connect (m_wxwindow, "map",
 413                       G_CALLBACK (gtk_glwindow_map_callback),
 414                       this);
 415     g_signal_connect (m_wxwindow, "expose_event",
 416                       G_CALLBACK (gtk_glwindow_expose_callback),
 417                       this);
 418     g_signal_connect (m_widget, "size_allocate",
 419                       G_CALLBACK (gtk_glcanvas_size_callback),
 420                       this);
 421
 422     if (gtk_check_version(2,2,0) != NULL)
 423     {
 424         gtk_widget_pop_colormap();
 425     }
 426
 427     // if our parent window is already visible, we had been realized before we
 428     // connected to the "realize" signal and hence our m_glContext hasn't been
 429     // initialized yet and we have to do it now
 430     if (GTK_WIDGET_REALIZED(m_wxwindow))
 431         gtk_glwindow_realized_callback( m_wxwindow, this );
 432
 433     if (GTK_WIDGET_MAPPED(m_wxwindow))
 434         gtk_glwindow_map_callback( m_wxwindow, this );
 435
 436     return true;
 437 }
 438
 439 wxGLCanvas::~wxGLCanvas()
 440 {
 441     GLXFBConfig * fbc = (GLXFBConfig *) m_fbc;
 442     if (fbc && m_canFreeFBC)
 443         XFree( fbc );
 444
 445     XVisualInfo *vi = (XVisualInfo *) m_vi;
 446     if (vi && m_canFreeVi)
 447         XFree( vi );
 448
 449     delete m_glContext;
 450 }
 451
 452 void* wxGLCanvas::ChooseGLVisual(int *attribList)
 453 {
 454     int data[512];
 455     GetGLAttribListFromWX( attribList, data );
 456     attribList = (int*) data;
 457
 458     Display *dpy = GDK_DISPLAY();
 459
 460     return glXChooseVisual( dpy, DefaultScreen(dpy), attribList );
 461 }
 462
 463 void* wxGLCanvas::ChooseGLFBC(int *attribList)
 464 {
 465     int data[512];
 466     GetGLAttribListFromWX( attribList, data );
 467     attribList = (int*) data;
 468
 469     int returned;
 470     return glXChooseFBConfig( GDK_DISPLAY(), DefaultScreen(GDK_DISPLAY()),
 471                               attribList, &returned );
 472 }
 473
 474
 475 void wxGLCanvas::GetGLAttribListFromWX(int *wx_attribList, int *gl_attribList )
 476 {
 477     if (!wx_attribList)
 478     {
 479         if (wxGLCanvas::GetGLXVersion() >= 13)
 480         // leave GLX >= 1.3 choose the default attributes
 481             gl_attribList[0] = 0;
 482         else
 483         {
 484             int i = 0;
 485             // default settings if attriblist = 0
 486             gl_attribList[i++] = GLX_RGBA;
 487             gl_attribList[i++] = GLX_DOUBLEBUFFER;
 488             gl_attribList[i++] = GLX_DEPTH_SIZE;   gl_attribList[i++] = 1;
 489             gl_attribList[i++] = GLX_RED_SIZE;     gl_attribList[i++] = 1;
 490             gl_attribList[i++] = GLX_GREEN_SIZE;   gl_attribList[i++] = 1;
 491             gl_attribList[i++] = GLX_BLUE_SIZE;    gl_attribList[i++] = 1;
 492             gl_attribList[i++] = GLX_ALPHA_SIZE;   gl_attribList[i++] = 0;
 493             gl_attribList[i++] = None;
 494         }
 495     }
 496     else
 497     {
 498         int arg=0, p=0;
 499         while( (wx_attribList[arg]!=0) && (p<510) )
 500         {
 501             switch( wx_attribList[arg++] )
 502             {
 503                 case WX_GL_RGBA:
 504                     if (wxGLCanvas::GetGLXVersion() <= 12)
 505                         // for GLX >= 1.3, GLX_RGBA is useless (setting this flags will crash on most opengl implm)
 506                         gl_attribList[p++] = GLX_RGBA;
 507                     break;
 508                 case WX_GL_BUFFER_SIZE:
 509                     gl_attribList[p++] = GLX_BUFFER_SIZE;
 510                     gl_attribList[p++] = wx_attribList[arg++];
 511                     break;
 512                 case WX_GL_LEVEL:
 513                     gl_attribList[p++] = GLX_LEVEL;
 514                     gl_attribList[p++] = wx_attribList[arg++];
 515                     break;
 516                 case WX_GL_DOUBLEBUFFER:
 517                     if (wxGLCanvas::GetGLXVersion() <= 12)
 518                         gl_attribList[p++] = GLX_DOUBLEBUFFER;
 519                     else
 520                         // for GLX >= 1.3, GLX_DOUBLEBUFFER format is different (1 <=> True)
 521                         // it seems this flag is useless for some hardware opengl implementation.
 522                         // but for Mesa 6.2.1, this flag is used so don't ignore it.
 523                         gl_attribList[p++] = GLX_DOUBLEBUFFER;
 524                     gl_attribList[p++] = 1;
 525                     break;
 526                 case WX_GL_STEREO:
 527                     gl_attribList[p++] = GLX_STEREO;
 528                     break;
 529                 case WX_GL_AUX_BUFFERS:
 530                     gl_attribList[p++] = GLX_AUX_BUFFERS;
 531                     gl_attribList[p++] = wx_attribList[arg++];
 532                     break;
 533                 case WX_GL_MIN_RED:
 534                     gl_attribList[p++] = GLX_RED_SIZE;
 535                     gl_attribList[p++] = wx_attribList[arg++];
 536                     break;
 537                 case WX_GL_MIN_GREEN:
 538                     gl_attribList[p++] = GLX_GREEN_SIZE;
 539                     gl_attribList[p++] = wx_attribList[arg++];
 540                     break;
 541                 case WX_GL_MIN_BLUE:
 542                     gl_attribList[p++] = GLX_BLUE_SIZE;
 543                     gl_attribList[p++] = wx_attribList[arg++];
 544                     break;
 545                 case WX_GL_MIN_ALPHA:
 546                     gl_attribList[p++] = GLX_ALPHA_SIZE;
 547                     gl_attribList[p++] = wx_attribList[arg++];
 548                     break;
 549                 case WX_GL_DEPTH_SIZE:
 550                     gl_attribList[p++] = GLX_DEPTH_SIZE;
 551                     gl_attribList[p++] = wx_attribList[arg++];
 552                     break;
 553                 case WX_GL_STENCIL_SIZE:
 554                     gl_attribList[p++] = GLX_STENCIL_SIZE;
 555                     gl_attribList[p++] = wx_attribList[arg++];
 556                     break;
 557                 case WX_GL_MIN_ACCUM_RED:
 558                     gl_attribList[p++] = GLX_ACCUM_RED_SIZE;
 559                     gl_attribList[p++] = wx_attribList[arg++];
 560                     break;
 561                 case WX_GL_MIN_ACCUM_GREEN:
 562                     gl_attribList[p++] = GLX_ACCUM_GREEN_SIZE;
 563                     gl_attribList[p++] = wx_attribList[arg++];
 564                     break;
 565                 case WX_GL_MIN_ACCUM_BLUE:
 566                     gl_attribList[p++] = GLX_ACCUM_BLUE_SIZE;
 567                     gl_attribList[p++] = wx_attribList[arg++];
 568                     break;
 569                 case WX_GL_MIN_ACCUM_ALPHA:
 570                     gl_attribList[p++] = GLX_ACCUM_ALPHA_SIZE;
 571                     gl_attribList[p++] = wx_attribList[arg++];
 572                     break;
 573                 default:
 574                     break;
 575             }
 576         }
 577
 578         gl_attribList[p] = 0;
 579     }
 580 }
 581
 582 void wxGLCanvas::QueryGLXVersion()
 583 {
 584     if (m_glxVersion == 0)
 585     {
 586         // check the GLX version
 587         int glxMajorVer, glxMinorVer;
 588         bool ok = glXQueryVersion(GDK_DISPLAY(), &glxMajorVer, &glxMinorVer);
 589         wxASSERT_MSG( ok, _T("GLX version not found") );
 590         if (!ok)
 591             m_glxVersion = 10; // 1.0 by default
 592         else
 593             m_glxVersion = glxMajorVer*10 + glxMinorVer;
 594     }
 595 }
 596
 597 int wxGLCanvas::GetGLXVersion()
 598 {
 599     wxASSERT_MSG( m_glxVersion>0, _T("GLX version has not been initialized with wxGLCanvas::QueryGLXVersion()") );
 600     return m_glxVersion;
 601 }
 602
 603
 604 void wxGLCanvas::SwapBuffers()
 605 {
 606     if (m_glContext)
 607         m_glContext->SwapBuffers();
 608 }
 609
 610 void wxGLCanvas::OnSize(wxSizeEvent& WXUNUSED(event))
 611 {
 612 }
 613
 614 void wxGLCanvas::SetCurrent()
 615 {
 616     if (m_glContext)
 617         m_glContext->SetCurrent();
 618 }
 619
 620 void wxGLCanvas::SetColour( const wxChar *colour )
 621 {
 622     if (m_glContext)
 623         m_glContext->SetColour( colour );
 624 }
 625
 626 void wxGLCanvas::OnInternalIdle()
 627 {
 628     if (m_glContext && m_exposed)
 629     {
 630         wxPaintEvent event( GetId() );
 631         event.SetEventObject( this );
 632         GetEventHandler()->ProcessEvent( event );
 633
 634         m_exposed = false;
 635         GetUpdateRegion().Clear();
 636     }
 637
 638     wxWindow::OnInternalIdle();
 639 }
 640
 641
 642
 643 //---------------------------------------------------------------------------
 644 // wxGLApp
 645 //---------------------------------------------------------------------------
 646
 647 IMPLEMENT_CLASS(wxGLApp, wxApp)
 648
 649 wxGLApp::~wxGLApp()
 650 {
 651     if (m_glFBCInfo)
 652         XFree(m_glFBCInfo);
 653     if (m_glVisualInfo)
 654         XFree(m_glVisualInfo);
 655 }
 656
 657 bool wxGLApp::InitGLVisual(int *attribList)
 658 {
 659     wxGLCanvas::QueryGLXVersion();
 660
 661     if (wxGLCanvas::GetGLXVersion() >= 13)
 662     {
 663         // GLX >= 1.3
 664         if (m_glFBCInfo)
 665             XFree(m_glFBCInfo);
 666         m_glFBCInfo = wxGLCanvas::ChooseGLFBC(attribList);
 667
 668         if (m_glFBCInfo)
 669         {
 670             if (m_glVisualInfo)
 671                 XFree(m_glVisualInfo);
 672             m_glVisualInfo = glXGetVisualFromFBConfig(GDK_DISPLAY(), ((GLXFBConfig *)m_glFBCInfo)[0]);
 673         }
 674         return (m_glFBCInfo != NULL) && (m_glVisualInfo != NULL);
 675     }
 676     else
 677     {
 678         // GLX <= 1.2
 679         if (m_glVisualInfo)
 680             XFree(m_glVisualInfo);
 681         m_glVisualInfo = wxGLCanvas::ChooseGLVisual(attribList);
 682         return m_glVisualInfo != NULL;
 683     }
 684 }
 685
 686 #endif
 687     // wxUSE_GLCANVAS