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     #include "wx/colour.h"
  23     #include "wx/module.h"
  24 #endif // WX_PRECOMP
  25
  26 extern "C"
  27 {
  28 #include "gtk/gtk.h"
  29 #include "gdk/gdk.h"
  30 #include "gdk/gdkx.h"
  31 }
  32
  33 #include "wx/gtk1/win_gtk.h"
  34
  35 // DLL options compatibility check:
  36 #include "wx/build.h"
  37 WX_CHECK_BUILD_OPTIONS("wxGL")
  38
  39
  40 //---------------------------------------------------------------------------
  41 // static variables
  42 //---------------------------------------------------------------------------
  43 int wxGLCanvas::m_glxVersion = 0;
  44
  45 //---------------------------------------------------------------------------
  46 // global data
  47 //---------------------------------------------------------------------------
  48
  49 XVisualInfo *g_vi = (XVisualInfo*) NULL;
  50 //-----------------------------------------------------------------------------
  51 // idle system
  52 //-----------------------------------------------------------------------------
  53
  54 extern void wxapp_install_idle_handler();
  55 extern bool g_isIdle;
  56
  57 //---------------------------------------------------------------------------
  58 // wxGLContext
  59 //---------------------------------------------------------------------------
  60
  61 IMPLEMENT_CLASS(wxGLContext,wxObject)
  62
  63 wxGLContext::wxGLContext( bool WXUNUSED(isRGB), wxWindow *win, const wxPalette& WXUNUSED(palette) )
  64 {
  65     m_window = win;
  66     m_widget = win->m_wxwindow;
  67
  68     wxGLCanvas *gc = (wxGLCanvas*) win;
  69
  70     if (wxGLCanvas::GetGLXVersion() >= 13)
  71     {
  72         // GLX >= 1.3
  73         GLXFBConfig *fbc = gc->m_fbc;
  74         wxCHECK_RET( fbc, _T("invalid GLXFBConfig for OpenGl") );
  75         m_glContext = glXCreateNewContext( GDK_DISPLAY(), fbc[0], GLX_RGBA_TYPE, None, GL_TRUE );
  76     }
  77     else
  78     {
  79         // GLX <= 1.2
  80         XVisualInfo *vi = (XVisualInfo *) gc->m_vi;
  81         wxCHECK_RET( vi, _T("invalid visual for OpenGl") );
  82         m_glContext = glXCreateContext( GDK_DISPLAY(), vi, None, GL_TRUE );
  83     }
  84
  85     wxCHECK_RET( m_glContext, _T("Couldn't create OpenGl context") );
  86 }
  87
  88 wxGLContext::wxGLContext(
  89                bool WXUNUSED(isRGB), wxWindow *win,
  90                const wxPalette& WXUNUSED(palette),
  91                const wxGLContext *other        /* for sharing display lists */
  92 )
  93 {
  94     m_window = win;
  95     m_widget = win->m_wxwindow;
  96
  97     wxGLCanvas *gc = (wxGLCanvas*) win;
  98
  99     if (wxGLCanvas::GetGLXVersion() >= 13)
 100     {
 101         // GLX >= 1.3
 102         GLXFBConfig *fbc = gc->m_fbc;
 103         wxCHECK_RET( fbc, _T("invalid GLXFBConfig for OpenGl") );
 104         m_glContext = glXCreateNewContext( GDK_DISPLAY(), fbc[0], GLX_RGBA_TYPE,
 105                                            other ? other->m_glContext : None,
 106                                            GL_TRUE );
 107     }
 108     else
 109     {
 110         // GLX <= 1.2
 111         XVisualInfo *vi = (XVisualInfo *) gc->m_vi;
 112         wxCHECK_RET( vi, _T("invalid visual for OpenGl") );
 113         m_glContext = glXCreateContext( GDK_DISPLAY(), vi,
 114                                         other ? other->m_glContext : None,
 115                                         GL_TRUE );
 116     }
 117
 118     if ( !m_glContext )
 119     {
 120         wxFAIL_MSG( _T("Couldn't create OpenGl context") );
 121     }
 122 }
 123
 124 wxGLContext::~wxGLContext()
 125 {
 126     if (!m_glContext) return;
 127
 128     if (m_glContext == glXGetCurrentContext())
 129     {
 130         if (wxGLCanvas::GetGLXVersion() >= 13)
 131             // GLX >= 1.3
 132             glXMakeContextCurrent( GDK_DISPLAY(), None, None, NULL);
 133         else
 134             // GLX <= 1.2
 135             glXMakeCurrent( GDK_DISPLAY(), None, NULL);
 136     }
 137
 138     glXDestroyContext( GDK_DISPLAY(), m_glContext );
 139 }
 140
 141 void wxGLContext::SwapBuffers()
 142 {
 143     if (m_glContext)
 144     {
 145         GdkWindow *window = GTK_PIZZA(m_widget)->bin_window;
 146         glXSwapBuffers( GDK_DISPLAY(), GDK_WINDOW_XWINDOW( window ) );
 147     }
 148 }
 149
 150 void wxGLContext::SetCurrent()
 151 {
 152     if (m_glContext)
 153     {
 154         GdkWindow *window = GTK_PIZZA(m_widget)->bin_window;
 155
 156         if (wxGLCanvas::GetGLXVersion() >= 13)
 157             // GLX >= 1.3
 158             glXMakeContextCurrent( GDK_DISPLAY(), GDK_WINDOW_XWINDOW(window),
 159                                    GDK_WINDOW_XWINDOW(window), m_glContext );
 160         else
 161             // GLX <= 1.2
 162             glXMakeCurrent( GDK_DISPLAY(), GDK_WINDOW_XWINDOW(window), m_glContext );
 163     }
 164 }
 165
 166 void wxGLContext::SetColour(const wxChar *colour)
 167 {
 168     wxColour col = wxTheColourDatabase->Find(colour);
 169     if (col.Ok())
 170     {
 171         float r = (float)(col.Red()/256.0);
 172         float g = (float)(col.Green()/256.0);
 173         float b = (float)(col.Blue()/256.0);
 174         glColor3f( r, g, b);
 175     }
 176 }
 177
 178 void wxGLContext::SetupPixelFormat()
 179 {
 180 }
 181
 182 void wxGLContext::SetupPalette( const wxPalette& WXUNUSED(palette) )
 183 {
 184 }
 185
 186 wxPalette wxGLContext::CreateDefaultPalette()
 187 {
 188     return wxNullPalette;
 189 }
 190
 191 //-----------------------------------------------------------------------------
 192 // "realize" from m_wxwindow
 193 //-----------------------------------------------------------------------------
 194
 195 extern "C" {
 196 static gint
 197 gtk_glwindow_realized_callback( GtkWidget *WXUNUSED(widget), wxGLCanvas *win )
 198 {
 199     if ( !win->m_glContext )
 200     {
 201         wxGLContext *share = win->m_sharedContext;
 202         if ( !share && win->m_sharedContextOf )
 203             share = win->m_sharedContextOf->GetContext();
 204
 205         win->m_glContext = new wxGLContext( TRUE, win, wxNullPalette, share );
 206     }
 207
 208     return FALSE;
 209 }
 210 }
 211
 212 //-----------------------------------------------------------------------------
 213 // "map" from m_wxwindow
 214 //-----------------------------------------------------------------------------
 215
 216 extern "C" {
 217 static gint
 218 gtk_glwindow_map_callback( GtkWidget * WXUNUSED(widget), wxGLCanvas *win )
 219 {
 220     if (win->m_glContext/* && win->m_exposed*/)
 221     {
 222         wxPaintEvent event( win->GetId() );
 223         event.SetEventObject( win );
 224         win->GetEventHandler()->ProcessEvent( event );
 225
 226         win->m_exposed = false;
 227         win->GetUpdateRegion().Clear();
 228     }
 229
 230     return FALSE;
 231 }
 232 }
 233
 234 //-----------------------------------------------------------------------------
 235 // "expose_event" of m_wxwindow
 236 //-----------------------------------------------------------------------------
 237
 238 extern "C" {
 239 static void
 240 gtk_glwindow_expose_callback( GtkWidget *WXUNUSED(widget), GdkEventExpose *gdk_event, wxGLCanvas *win )
 241 {
 242     if (g_isIdle)
 243         wxapp_install_idle_handler();
 244
 245     win->m_exposed = true;
 246
 247     win->GetUpdateRegion().Union( gdk_event->area.x,
 248                                   gdk_event->area.y,
 249                                   gdk_event->area.width,
 250                                   gdk_event->area.height );
 251 }
 252 }
 253
 254 //-----------------------------------------------------------------------------
 255 // "draw" of m_wxwindow
 256 //-----------------------------------------------------------------------------
 257
 258 extern "C" {
 259 static void
 260 gtk_glwindow_draw_callback( GtkWidget *WXUNUSED(widget), GdkRectangle *rect, wxGLCanvas *win )
 261 {
 262     if (g_isIdle)
 263         wxapp_install_idle_handler();
 264
 265     win->m_exposed = true;
 266
 267     win->GetUpdateRegion().Union( rect->x, rect->y,
 268                                   rect->width, rect->height );
 269 }
 270 }
 271
 272 //-----------------------------------------------------------------------------
 273 // "size_allocate" of m_wxwindow
 274 //-----------------------------------------------------------------------------
 275
 276 extern "C" {
 277 static void
 278 gtk_glcanvas_size_callback( GtkWidget *WXUNUSED(widget), GtkAllocation* alloc, wxGLCanvas *win )
 279 {
 280     if (g_isIdle)
 281         wxapp_install_idle_handler();
 282
 283     if (!win->m_hasVMT)
 284         return;
 285
 286     wxSizeEvent event( wxSize(win->m_width,win->m_height), win->GetId() );
 287     event.SetEventObject( win );
 288     win->GetEventHandler()->ProcessEvent( event );
 289 }
 290 }
 291
 292 //---------------------------------------------------------------------------
 293 // wxGlCanvas
 294 //---------------------------------------------------------------------------
 295
 296 IMPLEMENT_CLASS(wxGLCanvas, wxWindow)
 297
 298 BEGIN_EVENT_TABLE(wxGLCanvas, wxWindow)
 299     EVT_SIZE(wxGLCanvas::OnSize)
 300 END_EVENT_TABLE()
 301
 302 wxGLCanvas::wxGLCanvas( wxWindow *parent, 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, NULL, id, pos, size, style, name, attribList, palette );
 309 }
 310
 311 wxGLCanvas::wxGLCanvas( wxWindow *parent,
 312                         const wxGLContext *shared,
 313                         wxWindowID id,
 314                         const wxPoint& pos, const wxSize& size,
 315                         long style, const wxString& name,
 316                         int *attribList,
 317                         const wxPalette& palette )
 318 {
 319     Create( parent, shared, NULL, id, pos, size, style, name, attribList, palette );
 320 }
 321
 322 wxGLCanvas::wxGLCanvas( wxWindow *parent,
 323                         const wxGLCanvas *shared,
 324                         wxWindowID id,
 325                         const wxPoint& pos, const wxSize& size,
 326                         long style, const wxString& name,
 327                         int *attribList,
 328                         const wxPalette& palette )
 329 {
 330     Create( parent, NULL, shared, id, pos, size, style, name, attribList, palette );
 331 }
 332
 333 bool wxGLCanvas::Create( wxWindow *parent,
 334                          const wxGLContext *shared,
 335                          const wxGLCanvas *shared_context_of,
 336                          wxWindowID id,
 337                          const wxPoint& pos, const wxSize& size,
 338                          long style, const wxString& name,
 339                          int *attribList,
 340                          const wxPalette& palette)
 341 {
 342     m_sharedContext = (wxGLContext*)shared;  // const_cast
 343     m_sharedContextOf = (wxGLCanvas*)shared_context_of;  // const_cast
 344     m_glContext = (wxGLContext*) NULL;
 345
 346     m_exposed = false;
 347     m_noExpose = true;
 348     m_nativeSizeEvent = true;
 349     m_fbc = NULL;
 350     m_vi = NULL;
 351
 352     // to be sure the glx version is known
 353     wxGLCanvas::QueryGLXVersion();
 354
 355     if (wxGLCanvas::GetGLXVersion() >= 13)
 356     {
 357         // GLX >= 1.3 uses a GLXFBConfig
 358         GLXFBConfig * fbc = NULL;
 359         if (wxTheApp->m_glFBCInfo != NULL)
 360         {
 361             fbc = (GLXFBConfig *) wxTheApp->m_glFBCInfo;
 362             m_canFreeFBC = false; // owned by wxTheApp - don't free upon destruction
 363         }
 364         else
 365         {
 366             fbc = (GLXFBConfig *) wxGLCanvas::ChooseGLFBC(attribList);
 367             m_canFreeFBC = true;
 368         }
 369         m_fbc = fbc;  // save for later use
 370         wxCHECK_MSG( m_fbc, false, _T("required FBConfig couldn't be found") );
 371     }
 372
 373     XVisualInfo *vi = NULL;
 374     if (wxTheApp->m_glVisualInfo != NULL)
 375     {
 376         vi = (XVisualInfo *)wxTheApp->m_glVisualInfo;
 377         m_canFreeVi = false; // owned by wxTheApp - don't free upon destruction
 378     }
 379     else
 380     {
 381         if (wxGLCanvas::GetGLXVersion() >= 13)
 382         // GLX >= 1.3
 383             vi = glXGetVisualFromFBConfig(GDK_DISPLAY(), m_fbc[0]);
 384         else
 385             // GLX <= 1.2
 386             vi = (XVisualInfo *) ChooseGLVisual(attribList);
 387
 388         m_canFreeVi = true;
 389     }
 390
 391     m_vi = vi;  // save for later use
 392
 393     wxCHECK_MSG( m_vi, false, _T("required visual couldn't be found") );
 394     GdkVisual *visual;
 395     GdkColormap *colormap;
 396
 397     // MR: This needs a fix for lower gtk+ versions too. Might need to rethink logic (FIXME)
 398 #if 0
 399     if (!gtk_check_version(2,2,0))
 400     {
 401         wxWindow::Create( parent, id, pos, size, style, name );
 402
 403         m_glWidget = m_wxwindow;
 404
 405         GdkScreen *screen = gtk_widget_get_screen( m_glWidget );
 406         colormap = gdk_screen_get_default_colormap(screen);
 407         visual = gdk_colormap_get_visual(colormap);
 408
 409         if (GDK_VISUAL_XVISUAL(visual)->visualid != vi->visualid)
 410         {
 411             visual = gdk_x11_screen_lookup_visual( screen, vi->visualid );
 412             colormap = gdk_colormap_new(visual, FALSE);
 413         }
 414
 415         gtk_widget_set_colormap( m_glWidget, colormap );
 416     }
 417     else
 418 #endif
 419     {
 420         visual = gdkx_visual_get( vi->visualid );
 421         colormap = gdk_colormap_new( visual, TRUE );
 422
 423         gtk_widget_push_colormap( colormap );
 424         gtk_widget_push_visual( visual );
 425
 426         wxWindow::Create( parent, id, pos, size, style, name );
 427         m_glWidget = m_wxwindow;
 428     }
 429
 430     gtk_pizza_set_clear( GTK_PIZZA(m_wxwindow), FALSE );
 431
 432     gtk_signal_connect( GTK_OBJECT(m_wxwindow), "realize",
 433                             GTK_SIGNAL_FUNC(gtk_glwindow_realized_callback), (gpointer) this );
 434
 435     gtk_signal_connect( GTK_OBJECT(m_wxwindow), "map",
 436                             GTK_SIGNAL_FUNC(gtk_glwindow_map_callback), (gpointer) this );
 437
 438     gtk_signal_connect( GTK_OBJECT(m_wxwindow), "expose_event",
 439         GTK_SIGNAL_FUNC(gtk_glwindow_expose_callback), (gpointer)this );
 440
 441     gtk_signal_connect( GTK_OBJECT(m_wxwindow), "draw",
 442         GTK_SIGNAL_FUNC(gtk_glwindow_draw_callback), (gpointer)this );
 443
 444     gtk_signal_connect( GTK_OBJECT(m_widget), "size_allocate",
 445         GTK_SIGNAL_FUNC(gtk_glcanvas_size_callback), (gpointer)this );
 446
 447     gtk_widget_pop_visual();
 448     gtk_widget_pop_colormap();
 449
 450     // if our parent window is already visible, we had been realized before we
 451     // connected to the "realize" signal and hence our m_glContext hasn't been
 452     // initialized yet and we have to do it now
 453     if (GTK_WIDGET_REALIZED(m_wxwindow))
 454         gtk_glwindow_realized_callback( m_wxwindow, this );
 455
 456     if (GTK_WIDGET_MAPPED(m_wxwindow))
 457         gtk_glwindow_map_callback( m_wxwindow, this );
 458
 459     return true;
 460 }
 461
 462 wxGLCanvas::~wxGLCanvas()
 463 {
 464     GLXFBConfig * fbc = (GLXFBConfig *) m_fbc;
 465     if (fbc && m_canFreeFBC)
 466         XFree( fbc );
 467
 468     XVisualInfo *vi = (XVisualInfo *) m_vi;
 469     if (vi && m_canFreeVi)
 470         XFree( vi );
 471
 472     delete m_glContext;
 473 }
 474
 475 void* wxGLCanvas::ChooseGLVisual(int *attribList)
 476 {
 477     int data[512];
 478     GetGLAttribListFromWX( attribList, data );
 479     attribList = (int*) data;
 480
 481     Display *dpy = GDK_DISPLAY();
 482
 483     return glXChooseVisual( dpy, DefaultScreen(dpy), attribList );
 484 }
 485
 486 void* wxGLCanvas::ChooseGLFBC(int *attribList)
 487 {
 488     int data[512];
 489     GetGLAttribListFromWX( attribList, data );
 490     attribList = (int*) data;
 491
 492     int returned;
 493     return glXChooseFBConfig( GDK_DISPLAY(), DefaultScreen(GDK_DISPLAY()),
 494                               attribList, &returned );
 495 }
 496
 497
 498 void wxGLCanvas::GetGLAttribListFromWX(int *wx_attribList, int *gl_attribList )
 499 {
 500     if (!wx_attribList)
 501     {
 502         if (wxGLCanvas::GetGLXVersion() >= 13)
 503         // leave GLX >= 1.3 choose the default attributes
 504             gl_attribList[0] = 0;
 505         else
 506         {
 507             int i = 0;
 508             // default settings if attriblist = 0
 509             gl_attribList[i++] = GLX_RGBA;
 510             gl_attribList[i++] = GLX_DOUBLEBUFFER;
 511             gl_attribList[i++] = GLX_DEPTH_SIZE;   gl_attribList[i++] = 1;
 512             gl_attribList[i++] = GLX_RED_SIZE;     gl_attribList[i++] = 1;
 513             gl_attribList[i++] = GLX_GREEN_SIZE;   gl_attribList[i++] = 1;
 514             gl_attribList[i++] = GLX_BLUE_SIZE;    gl_attribList[i++] = 1;
 515             gl_attribList[i++] = GLX_ALPHA_SIZE;   gl_attribList[i++] = 0;
 516             gl_attribList[i++] = None;
 517         }
 518     }
 519     else
 520     {
 521         int arg=0, p=0;
 522         while( (wx_attribList[arg]!=0) && (p<510) )
 523         {
 524             switch( wx_attribList[arg++] )
 525             {
 526                 case WX_GL_RGBA:
 527                     if (wxGLCanvas::GetGLXVersion() <= 12)
 528                         // for GLX >= 1.3, GLX_RGBA is useless (setting this flags will crash on most opengl implm)
 529                         gl_attribList[p++] = GLX_RGBA;
 530                     break;
 531                 case WX_GL_BUFFER_SIZE:
 532                     gl_attribList[p++] = GLX_BUFFER_SIZE;
 533                     gl_attribList[p++] = wx_attribList[arg++];
 534                     break;
 535                 case WX_GL_LEVEL:
 536                     gl_attribList[p++] = GLX_LEVEL;
 537                     gl_attribList[p++] = wx_attribList[arg++];
 538                     break;
 539                 case WX_GL_DOUBLEBUFFER:
 540                     if (wxGLCanvas::GetGLXVersion() <= 12)
 541                         gl_attribList[p++] = GLX_DOUBLEBUFFER;
 542                     else
 543                         // for GLX >= 1.3, GLX_DOUBLEBUFFER format is different (1 <=> True)
 544                         // it seems this flag is useless for some hardware opengl implementation.
 545                         // but for Mesa 6.2.1, this flag is used so don't ignore it.
 546                         gl_attribList[p++] = GLX_DOUBLEBUFFER;
 547                     gl_attribList[p++] = 1;
 548                     break;
 549                 case WX_GL_STEREO:
 550                     gl_attribList[p++] = GLX_STEREO;
 551                     break;
 552                 case WX_GL_AUX_BUFFERS:
 553                     gl_attribList[p++] = GLX_AUX_BUFFERS;
 554                     gl_attribList[p++] = wx_attribList[arg++];
 555                     break;
 556                 case WX_GL_MIN_RED:
 557                     gl_attribList[p++] = GLX_RED_SIZE;
 558                     gl_attribList[p++] = wx_attribList[arg++];
 559                     break;
 560                 case WX_GL_MIN_GREEN:
 561                     gl_attribList[p++] = GLX_GREEN_SIZE;
 562                     gl_attribList[p++] = wx_attribList[arg++];
 563                     break;
 564                 case WX_GL_MIN_BLUE:
 565                     gl_attribList[p++] = GLX_BLUE_SIZE;
 566                     gl_attribList[p++] = wx_attribList[arg++];
 567                     break;
 568                 case WX_GL_MIN_ALPHA:
 569                     gl_attribList[p++] = GLX_ALPHA_SIZE;
 570                     gl_attribList[p++] = wx_attribList[arg++];
 571                     break;
 572                 case WX_GL_DEPTH_SIZE:
 573                     gl_attribList[p++] = GLX_DEPTH_SIZE;
 574                     gl_attribList[p++] = wx_attribList[arg++];
 575                     break;
 576                 case WX_GL_STENCIL_SIZE:
 577                     gl_attribList[p++] = GLX_STENCIL_SIZE;
 578                     gl_attribList[p++] = wx_attribList[arg++];
 579                     break;
 580                 case WX_GL_MIN_ACCUM_RED:
 581                     gl_attribList[p++] = GLX_ACCUM_RED_SIZE;
 582                     gl_attribList[p++] = wx_attribList[arg++];
 583                     break;
 584                 case WX_GL_MIN_ACCUM_GREEN:
 585                     gl_attribList[p++] = GLX_ACCUM_GREEN_SIZE;
 586                     gl_attribList[p++] = wx_attribList[arg++];
 587                     break;
 588                 case WX_GL_MIN_ACCUM_BLUE:
 589                     gl_attribList[p++] = GLX_ACCUM_BLUE_SIZE;
 590                     gl_attribList[p++] = wx_attribList[arg++];
 591                     break;
 592                 case WX_GL_MIN_ACCUM_ALPHA:
 593                     gl_attribList[p++] = GLX_ACCUM_ALPHA_SIZE;
 594                     gl_attribList[p++] = wx_attribList[arg++];
 595                     break;
 596                 default:
 597                     break;
 598             }
 599         }
 600
 601         gl_attribList[p] = 0;
 602     }
 603 }
 604
 605 void wxGLCanvas::QueryGLXVersion()
 606 {
 607     if (m_glxVersion == 0)
 608     {
 609         // check the GLX version
 610         int glxMajorVer, glxMinorVer;
 611         bool ok = glXQueryVersion(GDK_DISPLAY(), &glxMajorVer, &glxMinorVer);
 612         wxASSERT_MSG( ok, _T("GLX version not found") );
 613         if (!ok)
 614             m_glxVersion = 10; // 1.0 by default
 615         else
 616             m_glxVersion = glxMajorVer*10 + glxMinorVer;
 617     }
 618 }
 619
 620 int wxGLCanvas::GetGLXVersion()
 621 {
 622     wxASSERT_MSG( m_glxVersion>0, _T("GLX version has not been initialized with wxGLCanvas::QueryGLXVersion()") );
 623     return m_glxVersion;
 624 }
 625
 626
 627 void wxGLCanvas::SwapBuffers()
 628 {
 629     if (m_glContext)
 630         m_glContext->SwapBuffers();
 631 }
 632
 633 void wxGLCanvas::OnSize(wxSizeEvent& WXUNUSED(event))
 634 {
 635 }
 636
 637 void wxGLCanvas::SetCurrent()
 638 {
 639     if (m_glContext)
 640         m_glContext->SetCurrent();
 641 }
 642
 643 void wxGLCanvas::SetColour( const wxChar *colour )
 644 {
 645     if (m_glContext)
 646         m_glContext->SetColour( colour );
 647 }
 648
 649 void wxGLCanvas::OnInternalIdle()
 650 {
 651     if (m_glContext && m_exposed)
 652     {
 653         wxPaintEvent event( GetId() );
 654         event.SetEventObject( this );
 655         GetEventHandler()->ProcessEvent( event );
 656
 657         m_exposed = false;
 658         GetUpdateRegion().Clear();
 659     }
 660
 661     wxWindow::OnInternalIdle();
 662 }
 663
 664
 665
 666 //---------------------------------------------------------------------------
 667 // wxGLApp
 668 //---------------------------------------------------------------------------
 669
 670 IMPLEMENT_CLASS(wxGLApp, wxApp)
 671
 672 wxGLApp::~wxGLApp()
 673 {
 674     if (m_glFBCInfo)
 675         XFree(m_glFBCInfo);
 676     if (m_glVisualInfo)
 677         XFree(m_glVisualInfo);
 678 }
 679
 680 bool wxGLApp::InitGLVisual(int *attribList)
 681 {
 682     wxGLCanvas::QueryGLXVersion();
 683
 684     if (wxGLCanvas::GetGLXVersion() >= 13)
 685     {
 686         // GLX >= 1.3
 687         if (m_glFBCInfo)
 688             XFree(m_glFBCInfo);
 689         m_glFBCInfo = wxGLCanvas::ChooseGLFBC(attribList);
 690
 691         if (m_glFBCInfo)
 692         {
 693             if (m_glVisualInfo)
 694                 XFree(m_glVisualInfo);
 695             m_glVisualInfo = glXGetVisualFromFBConfig(GDK_DISPLAY(), ((GLXFBConfig *)m_glFBCInfo)[0]);
 696         }
 697         return (m_glFBCInfo != NULL) && (m_glVisualInfo != NULL);
 698     }
 699     else
 700     {
 701         // GLX <= 1.2
 702         if (m_glVisualInfo)
 703             XFree(m_glVisualInfo);
 704         m_glVisualInfo = wxGLCanvas::ChooseGLVisual(attribList);
 705         return m_glVisualInfo != NULL;
 706     }
 707 }
 708
 709 #endif
 710     // wxUSE_GLCANVAS