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