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