src/gtk1/glcanvas.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/gtk1/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/gtk1/win_gtk.h"
  35
  36 // DLL options compatibility check:
  37 #include "wx/build.h"
  38 WX_CHECK_BUILD_OPTIONS("wxGL")
  39
  40
  41 //---------------------------------------------------------------------------
  42 // static variables
  43 //---------------------------------------------------------------------------
  44 int wxGLCanvas::m_glxVersion = 0;
  45
  46 //---------------------------------------------------------------------------
  47 // global data
  48 //---------------------------------------------------------------------------
  49
  50 XVisualInfo *g_vi = (XVisualInfo*) NULL;
  51 //-----------------------------------------------------------------------------
  52 // idle system
  53 //-----------------------------------------------------------------------------
  54
  55 extern void wxapp_install_idle_handler();
  56 extern bool g_isIdle;
  57
  58 //---------------------------------------------------------------------------
  59 // wxGLContext
  60 //---------------------------------------------------------------------------
  61
  62 IMPLEMENT_CLASS(wxGLContext,wxObject)
  63
  64 wxGLContext::wxGLContext( bool WXUNUSED(isRGB), wxWindow *win, const wxPalette& WXUNUSED(palette) )
  65 {
  66     m_window = win;
  67     m_widget = win->m_wxwindow;
  68
  69     wxGLCanvas *gc = (wxGLCanvas*) win;
  70
  71     if (wxGLCanvas::GetGLXVersion() >= 13)
  72     {
  73         // GLX >= 1.3
  74         GLXFBConfig *fbc = gc->m_fbc;
  75         wxCHECK_RET( fbc, _T("invalid GLXFBConfig for OpenGl") );
  76         m_glContext = glXCreateNewContext( GDK_DISPLAY(), fbc[0], GLX_RGBA_TYPE, None, GL_TRUE );
  77     }
  78     else
  79     {
  80         // GLX <= 1.2
  81         XVisualInfo *vi = (XVisualInfo *) gc->m_vi;
  82         wxCHECK_RET( vi, _T("invalid visual for OpenGl") );
  83         m_glContext = glXCreateContext( GDK_DISPLAY(), vi, None, GL_TRUE );
  84     }
  85
  86     wxCHECK_RET( m_glContext, _T("Couldn't create OpenGl context") );
  87 }
  88
  89 wxGLContext::wxGLContext(
  90                bool WXUNUSED(isRGB), wxWindow *win,
  91                const wxPalette& WXUNUSED(palette),
  92                const wxGLContext *other        /* for sharing display lists */
  93 )
  94 {
  95     m_window = win;
  96     m_widget = win->m_wxwindow;
  97
  98     wxGLCanvas *gc = (wxGLCanvas*) win;
  99
 100     if (wxGLCanvas::GetGLXVersion() >= 13)
 101     {
 102         // GLX >= 1.3
 103         GLXFBConfig *fbc = gc->m_fbc;
 104         wxCHECK_RET( fbc, _T("invalid GLXFBConfig for OpenGl") );
 105         m_glContext = glXCreateNewContext( GDK_DISPLAY(), fbc[0], GLX_RGBA_TYPE,
 106                                            other ? other->m_glContext : None,
 107                                            GL_TRUE );
 108     }
 109     else
 110     {
 111         // GLX <= 1.2
 112         XVisualInfo *vi = (XVisualInfo *) gc->m_vi;
 113         wxCHECK_RET( vi, _T("invalid visual for OpenGl") );
 114         m_glContext = glXCreateContext( GDK_DISPLAY(), vi,
 115                                         other ? other->m_glContext : None,
 116                                         GL_TRUE );
 117     }
 118
 119     if ( !m_glContext )
 120     {
 121         wxFAIL_MSG( _T("Couldn't create OpenGl context") );
 122     }
 123 }
 124
 125 wxGLContext::~wxGLContext()
 126 {
 127     if (!m_glContext) return;
 128
 129     if (m_glContext == glXGetCurrentContext())
 130     {
 131         if (wxGLCanvas::GetGLXVersion() >= 13)
 132             // GLX >= 1.3
 133             glXMakeContextCurrent( GDK_DISPLAY(), None, None, NULL);
 134         else
 135             // GLX <= 1.2
 136             glXMakeCurrent( GDK_DISPLAY(), None, NULL);
 137     }
 138
 139     glXDestroyContext( GDK_DISPLAY(), m_glContext );
 140 }
 141
 142 void wxGLContext::SwapBuffers()
 143 {
 144     if (m_glContext)
 145     {
 146         GdkWindow *window = GTK_PIZZA(m_widget)->bin_window;
 147         glXSwapBuffers( GDK_DISPLAY(), GDK_WINDOW_XWINDOW( window ) );
 148     }
 149 }
 150
 151 void wxGLContext::SetCurrent()
 152 {
 153     if (m_glContext)
 154     {
 155         GdkWindow *window = GTK_PIZZA(m_widget)->bin_window;
 156
 157         if (wxGLCanvas::GetGLXVersion() >= 13)
 158             // GLX >= 1.3
 159             glXMakeContextCurrent( GDK_DISPLAY(), GDK_WINDOW_XWINDOW(window),
 160                                    GDK_WINDOW_XWINDOW(window), m_glContext );
 161         else
 162             // GLX <= 1.2
 163             glXMakeCurrent( GDK_DISPLAY(), GDK_WINDOW_XWINDOW(window), m_glContext );
 164     }
 165 }
 166
 167 void wxGLContext::SetColour(const wxChar *colour)
 168 {
 169     wxColour col = wxTheColourDatabase->Find(colour);
 170     if (col.Ok())
 171     {
 172         float r = (float)(col.Red()/256.0);
 173         float g = (float)(col.Green()/256.0);
 174         float b = (float)(col.Blue()/256.0);
 175         glColor3f( r, g, b);
 176     }
 177 }
 178
 179 void wxGLContext::SetupPixelFormat()
 180 {
 181 }
 182
 183 void wxGLContext::SetupPalette( const wxPalette& WXUNUSED(palette) )
 184 {
 185 }
 186
 187 wxPalette wxGLContext::CreateDefaultPalette()
 188 {
 189     return wxNullPalette;
 190 }
 191
 192 //-----------------------------------------------------------------------------
 193 // "realize" from m_wxwindow
 194 //-----------------------------------------------------------------------------
 195
 196 extern "C" {
 197 static gint
 198 gtk_glwindow_realized_callback( GtkWidget *WXUNUSED(widget), wxGLCanvas *win )
 199 {
 200     if ( !win->m_glContext )
 201     {
 202         wxGLContext *share = win->m_sharedContext;
 203         if ( !share && win->m_sharedContextOf )
 204             share = win->m_sharedContextOf->GetContext();
 205
 206         win->m_glContext = new wxGLContext( TRUE, win, wxNullPalette, share );
 207     }
 208
 209     return FALSE;
 210 }
 211 }
 212
 213 //-----------------------------------------------------------------------------
 214 // "map" from m_wxwindow
 215 //-----------------------------------------------------------------------------
 216
 217 extern "C" {
 218 static gint
 219 gtk_glwindow_map_callback( GtkWidget * WXUNUSED(widget), wxGLCanvas *win )
 220 {
 221     if (win->m_glContext/* && win->m_exposed*/)
 222     {
 223         wxPaintEvent event( win->GetId() );
 224         event.SetEventObject( win );
 225         win->GetEventHandler()->ProcessEvent( event );
 226
 227         win->m_exposed = false;
 228         win->GetUpdateRegion().Clear();
 229     }
 230
 231     return FALSE;
 232 }
 233 }
 234
 235 //-----------------------------------------------------------------------------
 236 // "expose_event" of m_wxwindow
 237 //-----------------------------------------------------------------------------
 238
 239 extern "C" {
 240 static void
 241 gtk_glwindow_expose_callback( GtkWidget *WXUNUSED(widget), GdkEventExpose *gdk_event, wxGLCanvas *win )
 242 {
 243     if (g_isIdle)
 244         wxapp_install_idle_handler();
 245
 246     win->m_exposed = true;
 247
 248     win->GetUpdateRegion().Union( gdk_event->area.x,
 249                                   gdk_event->area.y,
 250                                   gdk_event->area.width,
 251                                   gdk_event->area.height );
 252 }
 253 }
 254
 255 //-----------------------------------------------------------------------------
 256 // "draw" of m_wxwindow
 257 //-----------------------------------------------------------------------------
 258
 259 extern "C" {
 260 static void
 261 gtk_glwindow_draw_callback( GtkWidget *WXUNUSED(widget), GdkRectangle *rect, wxGLCanvas *win )
 262 {
 263     if (g_isIdle)
 264         wxapp_install_idle_handler();
 265
 266     win->m_exposed = true;
 267
 268     win->GetUpdateRegion().Union( rect->x, rect->y,
 269                                   rect->width, rect->height );
 270 }
 271 }
 272
 273 //-----------------------------------------------------------------------------
 274 // "size_allocate" of m_wxwindow
 275 //-----------------------------------------------------------------------------
 276
 277 extern "C" {
 278 static void
 279 gtk_glcanvas_size_callback( GtkWidget *WXUNUSED(widget), GtkAllocation* alloc, wxGLCanvas *win )
 280 {
 281     if (g_isIdle)
 282         wxapp_install_idle_handler();
 283
 284     if (!win->m_hasVMT)
 285         return;
 286
 287     wxSizeEvent event( wxSize(win->m_width,win->m_height), win->GetId() );
 288     event.SetEventObject( win );
 289     win->GetEventHandler()->ProcessEvent( event );
 290 }
 291 }
 292
 293 //---------------------------------------------------------------------------
 294 // wxGlCanvas
 295 //---------------------------------------------------------------------------
 296
 297 IMPLEMENT_CLASS(wxGLCanvas, wxWindow)
 298
 299 BEGIN_EVENT_TABLE(wxGLCanvas, wxWindow)
 300     EVT_SIZE(wxGLCanvas::OnSize)
 301 END_EVENT_TABLE()
 302
 303 wxGLCanvas::wxGLCanvas( wxWindow *parent, wxWindowID id,
 304                         const wxPoint& pos, const wxSize& size,
 305                         long style, const wxString& name,
 306                         int *attribList,
 307                         const wxPalette& palette )
 308 {
 309     Create( parent, NULL, NULL, id, pos, size, style, name, attribList, palette );
 310 }
 311
 312 wxGLCanvas::wxGLCanvas( wxWindow *parent,
 313                         const wxGLContext *shared,
 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     Create( parent, shared, NULL, id, pos, size, style, name, attribList, palette );
 321 }
 322
 323 wxGLCanvas::wxGLCanvas( wxWindow *parent,
 324                         const wxGLCanvas *shared,
 325                         wxWindowID id,
 326                         const wxPoint& pos, const wxSize& size,
 327                         long style, const wxString& name,
 328                         int *attribList,
 329                         const wxPalette& palette )
 330 {
 331     Create( parent, NULL, shared, id, pos, size, style, name, attribList, palette );
 332 }
 333
 334 bool wxGLCanvas::Create( wxWindow *parent,
 335                          const wxGLContext *shared,
 336                          const wxGLCanvas *shared_context_of,
 337                          wxWindowID id,
 338                          const wxPoint& pos, const wxSize& size,
 339                          long style, const wxString& name,
 340                          int *attribList,
 341                          const wxPalette& palette)
 342 {
 343     m_sharedContext = (wxGLContext*)shared;  // const_cast
 344     m_sharedContextOf = (wxGLCanvas*)shared_context_of;  // const_cast
 345     m_glContext = (wxGLContext*) NULL;
 346
 347     m_exposed = false;
 348     m_noExpose = true;
 349     m_nativeSizeEvent = true;
 350     m_fbc = NULL;
 351     m_vi = NULL;
 352
 353     // to be sure the glx version is known
 354     wxGLCanvas::QueryGLXVersion();
 355
 356     if (wxGLCanvas::GetGLXVersion() >= 13)
 357     {
 358         // GLX >= 1.3 uses a GLXFBConfig
 359         GLXFBConfig * fbc = NULL;
 360         if (wxTheApp->m_glFBCInfo != NULL)
 361         {
 362             fbc = (GLXFBConfig *) wxTheApp->m_glFBCInfo;
 363             m_canFreeFBC = false; // owned by wxTheApp - don't free upon destruction
 364         }
 365         else
 366         {
 367             fbc = (GLXFBConfig *) wxGLCanvas::ChooseGLFBC(attribList);
 368             m_canFreeFBC = true;
 369         }
 370         m_fbc = fbc;  // save for later use
 371         wxCHECK_MSG( m_fbc, false, _T("required FBConfig couldn't be found") );
 372     }
 373
 374     XVisualInfo *vi = NULL;
 375     if (wxTheApp->m_glVisualInfo != NULL)
 376     {
 377         vi = (XVisualInfo *)wxTheApp->m_glVisualInfo;
 378         m_canFreeVi = false; // owned by wxTheApp - don't free upon destruction
 379     }
 380     else
 381     {
 382         if (wxGLCanvas::GetGLXVersion() >= 13)
 383         // GLX >= 1.3
 384             vi = glXGetVisualFromFBConfig(GDK_DISPLAY(), m_fbc[0]);
 385         else
 386             // GLX <= 1.2
 387             vi = (XVisualInfo *) ChooseGLVisual(attribList);
 388
 389         m_canFreeVi = true;
 390     }
 391
 392     m_vi = vi;  // save for later use
 393
 394     wxCHECK_MSG( m_vi, false, _T("required visual couldn't be found") );
 395     GdkVisual *visual;
 396     GdkColormap *colormap;
 397
 398     // MR: This needs a fix for lower gtk+ versions too. Might need to rethink logic (FIXME)
 399 #if 0
 400     if (!gtk_check_version(2,2,0))
 401     {
 402         wxWindow::Create( parent, id, pos, size, style, name );
 403
 404         m_glWidget = m_wxwindow;
 405
 406         GdkScreen *screen = gtk_widget_get_screen( m_glWidget );
 407         colormap = gdk_screen_get_default_colormap(screen);
 408         visual = gdk_colormap_get_visual(colormap);
 409
 410         if (GDK_VISUAL_XVISUAL(visual)->visualid != vi->visualid)
 411         {
 412             visual = gdk_x11_screen_lookup_visual( screen, vi->visualid );
 413             colormap = gdk_colormap_new(visual, FALSE);
 414         }
 415
 416         gtk_widget_set_colormap( m_glWidget, colormap );
 417     }
 418     else
 419 #endif
 420     {
 421         visual = gdkx_visual_get( vi->visualid );
 422         colormap = gdk_colormap_new( visual, TRUE );
 423
 424         gtk_widget_push_colormap( colormap );
 425         gtk_widget_push_visual( visual );
 426
 427         wxWindow::Create( parent, id, pos, size, style, name );
 428         m_glWidget = m_wxwindow;
 429     }
 430
 431     gtk_pizza_set_clear( GTK_PIZZA(m_wxwindow), FALSE );
 432
 433     gtk_signal_connect( GTK_OBJECT(m_wxwindow), "realize",
 434                             GTK_SIGNAL_FUNC(gtk_glwindow_realized_callback), (gpointer) this );
 435
 436     gtk_signal_connect( GTK_OBJECT(m_wxwindow), "map",
 437                             GTK_SIGNAL_FUNC(gtk_glwindow_map_callback), (gpointer) this );
 438
 439     gtk_signal_connect( GTK_OBJECT(m_wxwindow), "expose_event",
 440         GTK_SIGNAL_FUNC(gtk_glwindow_expose_callback), (gpointer)this );
 441
 442     gtk_signal_connect( GTK_OBJECT(m_wxwindow), "draw",
 443         GTK_SIGNAL_FUNC(gtk_glwindow_draw_callback), (gpointer)this );
 444
 445     gtk_signal_connect( GTK_OBJECT(m_widget), "size_allocate",
 446         GTK_SIGNAL_FUNC(gtk_glcanvas_size_callback), (gpointer)this );
 447
 448     gtk_widget_pop_visual();
 449     gtk_widget_pop_colormap();
 450
 451     // if our parent window is already visible, we had been realized before we
 452     // connected to the "realize" signal and hence our m_glContext hasn't been
 453     // initialized yet and we have to do it now
 454     if (GTK_WIDGET_REALIZED(m_wxwindow))
 455         gtk_glwindow_realized_callback( m_wxwindow, this );
 456
 457     if (GTK_WIDGET_MAPPED(m_wxwindow))
 458         gtk_glwindow_map_callback( m_wxwindow, this );
 459
 460     return true;
 461 }
 462
 463 wxGLCanvas::~wxGLCanvas()
 464 {
 465     GLXFBConfig * fbc = (GLXFBConfig *) m_fbc;
 466     if (fbc && m_canFreeFBC)
 467         XFree( fbc );
 468
 469     XVisualInfo *vi = (XVisualInfo *) m_vi;
 470     if (vi && m_canFreeVi)
 471         XFree( vi );
 472
 473     delete m_glContext;
 474 }
 475
 476 void* wxGLCanvas::ChooseGLVisual(int *attribList)
 477 {
 478     int data[512];
 479     GetGLAttribListFromWX( attribList, data );
 480     attribList = (int*) data;
 481
 482     Display *dpy = GDK_DISPLAY();
 483
 484     return glXChooseVisual( dpy, DefaultScreen(dpy), attribList );
 485 }
 486
 487 void* wxGLCanvas::ChooseGLFBC(int *attribList)
 488 {
 489     int data[512];
 490     GetGLAttribListFromWX( attribList, data );
 491     attribList = (int*) data;
 492
 493     int returned;
 494     return glXChooseFBConfig( GDK_DISPLAY(), DefaultScreen(GDK_DISPLAY()),
 495                               attribList, &returned );
 496 }
 497
 498
 499 void wxGLCanvas::GetGLAttribListFromWX(int *wx_attribList, int *gl_attribList )
 500 {
 501     if (!wx_attribList)
 502     {
 503         if (wxGLCanvas::GetGLXVersion() >= 13)
 504         // leave GLX >= 1.3 choose the default attributes
 505             gl_attribList[0] = 0;
 506         else
 507         {
 508             int i = 0;
 509             // default settings if attriblist = 0
 510             gl_attribList[i++] = GLX_RGBA;
 511             gl_attribList[i++] = GLX_DOUBLEBUFFER;
 512             gl_attribList[i++] = GLX_DEPTH_SIZE;   gl_attribList[i++] = 1;
 513             gl_attribList[i++] = GLX_RED_SIZE;     gl_attribList[i++] = 1;
 514             gl_attribList[i++] = GLX_GREEN_SIZE;   gl_attribList[i++] = 1;
 515             gl_attribList[i++] = GLX_BLUE_SIZE;    gl_attribList[i++] = 1;
 516             gl_attribList[i++] = GLX_ALPHA_SIZE;   gl_attribList[i++] = 0;
 517             gl_attribList[i++] = None;
 518         }
 519     }
 520     else
 521     {
 522         int arg=0, p=0;
 523         while( (wx_attribList[arg]!=0) && (p<510) )
 524         {
 525             switch( wx_attribList[arg++] )
 526             {
 527                 case WX_GL_RGBA:
 528                     if (wxGLCanvas::GetGLXVersion() <= 12)
 529                         // for GLX >= 1.3, GLX_RGBA is useless (setting this flags will crash on most opengl implm)
 530                         gl_attribList[p++] = GLX_RGBA;
 531                     break;
 532                 case WX_GL_BUFFER_SIZE:
 533                     gl_attribList[p++] = GLX_BUFFER_SIZE;
 534                     gl_attribList[p++] = wx_attribList[arg++];
 535                     break;
 536                 case WX_GL_LEVEL:
 537                     gl_attribList[p++] = GLX_LEVEL;
 538                     gl_attribList[p++] = wx_attribList[arg++];
 539                     break;
 540                 case WX_GL_DOUBLEBUFFER:
 541                     if (wxGLCanvas::GetGLXVersion() <= 12)
 542                         gl_attribList[p++] = GLX_DOUBLEBUFFER;
 543                     else
 544                         // for GLX >= 1.3, GLX_DOUBLEBUFFER format is different (1 <=> True)
 545                         // it seems this flag is useless for some hardware opengl implementation.
 546                         // but for Mesa 6.2.1, this flag is used so don't ignore it.
 547                         gl_attribList[p++] = GLX_DOUBLEBUFFER;
 548                     gl_attribList[p++] = 1;
 549                     break;
 550                 case WX_GL_STEREO:
 551                     gl_attribList[p++] = GLX_STEREO;
 552                     break;
 553                 case WX_GL_AUX_BUFFERS:
 554                     gl_attribList[p++] = GLX_AUX_BUFFERS;
 555                     gl_attribList[p++] = wx_attribList[arg++];
 556                     break;
 557                 case WX_GL_MIN_RED:
 558                     gl_attribList[p++] = GLX_RED_SIZE;
 559                     gl_attribList[p++] = wx_attribList[arg++];
 560                     break;
 561                 case WX_GL_MIN_GREEN:
 562                     gl_attribList[p++] = GLX_GREEN_SIZE;
 563                     gl_attribList[p++] = wx_attribList[arg++];
 564                     break;
 565                 case WX_GL_MIN_BLUE:
 566                     gl_attribList[p++] = GLX_BLUE_SIZE;
 567                     gl_attribList[p++] = wx_attribList[arg++];
 568                     break;
 569                 case WX_GL_MIN_ALPHA:
 570                     gl_attribList[p++] = GLX_ALPHA_SIZE;
 571                     gl_attribList[p++] = wx_attribList[arg++];
 572                     break;
 573                 case WX_GL_DEPTH_SIZE:
 574                     gl_attribList[p++] = GLX_DEPTH_SIZE;
 575                     gl_attribList[p++] = wx_attribList[arg++];
 576                     break;
 577                 case WX_GL_STENCIL_SIZE:
 578                     gl_attribList[p++] = GLX_STENCIL_SIZE;
 579                     gl_attribList[p++] = wx_attribList[arg++];
 580                     break;
 581                 case WX_GL_MIN_ACCUM_RED:
 582                     gl_attribList[p++] = GLX_ACCUM_RED_SIZE;
 583                     gl_attribList[p++] = wx_attribList[arg++];
 584                     break;
 585                 case WX_GL_MIN_ACCUM_GREEN:
 586                     gl_attribList[p++] = GLX_ACCUM_GREEN_SIZE;
 587                     gl_attribList[p++] = wx_attribList[arg++];
 588                     break;
 589                 case WX_GL_MIN_ACCUM_BLUE:
 590                     gl_attribList[p++] = GLX_ACCUM_BLUE_SIZE;
 591                     gl_attribList[p++] = wx_attribList[arg++];
 592                     break;
 593                 case WX_GL_MIN_ACCUM_ALPHA:
 594                     gl_attribList[p++] = GLX_ACCUM_ALPHA_SIZE;
 595                     gl_attribList[p++] = wx_attribList[arg++];
 596                     break;
 597                 default:
 598                     break;
 599             }
 600         }
 601
 602         gl_attribList[p] = 0;
 603     }
 604 }
 605
 606 void wxGLCanvas::QueryGLXVersion()
 607 {
 608     if (m_glxVersion == 0)
 609     {
 610         // check the GLX version
 611         int glxMajorVer, glxMinorVer;
 612         bool ok = glXQueryVersion(GDK_DISPLAY(), &glxMajorVer, &glxMinorVer);
 613         wxASSERT_MSG( ok, _T("GLX version not found") );
 614         if (!ok)
 615             m_glxVersion = 10; // 1.0 by default
 616         else
 617             m_glxVersion = glxMajorVer*10 + glxMinorVer;
 618     }
 619 }
 620
 621 int wxGLCanvas::GetGLXVersion()
 622 {
 623     wxASSERT_MSG( m_glxVersion>0, _T("GLX version has not been initialized with wxGLCanvas::QueryGLXVersion()") );
 624     return m_glxVersion;
 625 }
 626
 627
 628 void wxGLCanvas::SwapBuffers()
 629 {
 630     if (m_glContext)
 631         m_glContext->SwapBuffers();
 632 }
 633
 634 void wxGLCanvas::OnSize(wxSizeEvent& WXUNUSED(event))
 635 {
 636 }
 637
 638 void wxGLCanvas::SetCurrent()
 639 {
 640     if (m_glContext)
 641         m_glContext->SetCurrent();
 642 }
 643
 644 void wxGLCanvas::SetColour( const wxChar *colour )
 645 {
 646     if (m_glContext)
 647         m_glContext->SetColour( colour );
 648 }
 649
 650 void wxGLCanvas::OnInternalIdle()
 651 {
 652     if (m_glContext && m_exposed)
 653     {
 654         wxPaintEvent event( GetId() );
 655         event.SetEventObject( this );
 656         GetEventHandler()->ProcessEvent( event );
 657
 658         m_exposed = false;
 659         GetUpdateRegion().Clear();
 660     }
 661
 662     wxWindow::OnInternalIdle();
 663 }
 664
 665
 666
 667 //---------------------------------------------------------------------------
 668 // wxGLApp
 669 //---------------------------------------------------------------------------
 670
 671 IMPLEMENT_CLASS(wxGLApp, wxApp)
 672
 673 wxGLApp::~wxGLApp()
 674 {
 675     if (m_glFBCInfo)
 676         XFree(m_glFBCInfo);
 677     if (m_glVisualInfo)
 678         XFree(m_glVisualInfo);
 679 }
 680
 681 bool wxGLApp::InitGLVisual(int *attribList)
 682 {
 683     wxGLCanvas::QueryGLXVersion();
 684
 685     if (wxGLCanvas::GetGLXVersion() >= 13)
 686     {
 687         // GLX >= 1.3
 688         if (m_glFBCInfo)
 689             XFree(m_glFBCInfo);
 690         m_glFBCInfo = wxGLCanvas::ChooseGLFBC(attribList);
 691
 692         if (m_glFBCInfo)
 693         {
 694             if (m_glVisualInfo)
 695                 XFree(m_glVisualInfo);
 696             m_glVisualInfo = glXGetVisualFromFBConfig(GDK_DISPLAY(), ((GLXFBConfig *)m_glFBCInfo)[0]);
 697         }
 698         return (m_glFBCInfo != NULL) && (m_glVisualInfo != NULL);
 699     }
 700     else
 701     {
 702         // GLX <= 1.2
 703         if (m_glVisualInfo)
 704             XFree(m_glVisualInfo);
 705         m_glVisualInfo = wxGLCanvas::ChooseGLVisual(attribList);
 706         return m_glVisualInfo != NULL;
 707     }
 708 }
 709
 710 #endif
 711     // wxUSE_GLCANVAS