src/gtk1/glcanvas.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        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 #include "wx/setup.h"
  16
  17 #if wxUSE_GLCANVAS
  18
  19 #include "wx/glcanvas.h"
  20
  21 #include "wx/frame.h"
  22 #include "wx/colour.h"
  23 #include "wx/module.h"
  24 #include "wx/app.h"
  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/gtk/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 #ifndef __WXGTK20__
 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 #endif
 273
 274 //-----------------------------------------------------------------------------
 275 // "size_allocate" of m_wxwindow
 276 //-----------------------------------------------------------------------------
 277
 278 extern "C" {
 279 static void
 280 gtk_glcanvas_size_callback( GtkWidget *WXUNUSED(widget), GtkAllocation* alloc, wxGLCanvas *win )
 281 {
 282     if (g_isIdle)
 283         wxapp_install_idle_handler();
 284
 285     if (!win->m_hasVMT)
 286         return;
 287
 288     wxSizeEvent event( wxSize(win->m_width,win->m_height), win->GetId() );
 289     event.SetEventObject( win );
 290     win->GetEventHandler()->ProcessEvent( event );
 291 }
 292 }
 293
 294 //---------------------------------------------------------------------------
 295 // wxGlCanvas
 296 //---------------------------------------------------------------------------
 297
 298 IMPLEMENT_CLASS(wxGLCanvas, wxWindow)
 299
 300 BEGIN_EVENT_TABLE(wxGLCanvas, wxWindow)
 301     EVT_SIZE(wxGLCanvas::OnSize)
 302 END_EVENT_TABLE()
 303
 304 wxGLCanvas::wxGLCanvas( wxWindow *parent, wxWindowID id,
 305                         const wxPoint& pos, const wxSize& size,
 306                         long style, const wxString& name,
 307                         int *attribList,
 308                         const wxPalette& palette )
 309 {
 310     Create( parent, NULL, NULL, id, pos, size, style, name, attribList, palette );
 311 }
 312
 313 wxGLCanvas::wxGLCanvas( wxWindow *parent,
 314                         const wxGLContext *shared,
 315                         wxWindowID id,
 316                         const wxPoint& pos, const wxSize& size,
 317                         long style, const wxString& name,
 318                         int *attribList,
 319                         const wxPalette& palette )
 320 {
 321     Create( parent, shared, NULL, id, pos, size, style, name, attribList, palette );
 322 }
 323
 324 wxGLCanvas::wxGLCanvas( wxWindow *parent,
 325                         const wxGLCanvas *shared,
 326                         wxWindowID id,
 327                         const wxPoint& pos, const wxSize& size,
 328                         long style, const wxString& name,
 329                         int *attribList,
 330                         const wxPalette& palette )
 331 {
 332     Create( parent, NULL, shared, id, pos, size, style, name, attribList, palette );
 333 }
 334
 335 bool wxGLCanvas::Create( wxWindow *parent,
 336                          const wxGLContext *shared,
 337                          const wxGLCanvas *shared_context_of,
 338                          wxWindowID id,
 339                          const wxPoint& pos, const wxSize& size,
 340                          long style, const wxString& name,
 341                          int *attribList,
 342                          const wxPalette& palette)
 343 {
 344     m_sharedContext = (wxGLContext*)shared;  // const_cast
 345     m_sharedContextOf = (wxGLCanvas*)shared_context_of;  // const_cast
 346     m_glContext = (wxGLContext*) NULL;
 347
 348     m_exposed = FALSE;
 349     m_noExpose = TRUE;
 350     m_nativeSizeEvent = TRUE;
 351     m_fbc = NULL;
 352     m_vi = NULL;
 353
 354     // to be sure the glx version is known
 355     wxGLCanvas::QueryGLXVersion();
 356
 357     if (wxGLCanvas::GetGLXVersion() >= 13)
 358     {
 359         // GLX >= 1.3 uses a GLXFBConfig
 360         GLXFBConfig * fbc = NULL;
 361         if (wxTheApp->m_glFBCInfo != NULL)
 362         {
 363             fbc = (GLXFBConfig *) wxTheApp->m_glFBCInfo;
 364             m_canFreeFBC = FALSE; // owned by wxTheApp - don't free upon destruction
 365         }
 366         else
 367         {
 368             fbc = (GLXFBConfig *) wxGLCanvas::ChooseGLFBC(attribList);
 369             m_canFreeFBC = TRUE;
 370         }
 371         m_fbc = fbc;  // save for later use
 372         wxCHECK_MSG( m_fbc, FALSE, _T("required FBConfig couldn't be found") );
 373     }
 374
 375     XVisualInfo *vi = NULL;
 376     if (wxTheApp->m_glVisualInfo != NULL)
 377     {
 378         vi = (XVisualInfo *)wxTheApp->m_glVisualInfo;
 379         m_canFreeVi = FALSE; // owned by wxTheApp - don't free upon destruction
 380     }
 381     else
 382     {
 383         if (wxGLCanvas::GetGLXVersion() >= 13)
 384         // GLX >= 1.3
 385             vi = glXGetVisualFromFBConfig(GDK_DISPLAY(), m_fbc[0]);
 386         else
 387             // GLX <= 1.2
 388             vi = (XVisualInfo *) ChooseGLVisual(attribList);
 389
 390         m_canFreeVi = TRUE;
 391     }
 392
 393     m_vi = vi;  // save for later use
 394
 395     wxCHECK_MSG( m_vi, FALSE, _T("required visual couldn't be found") );
 396     GdkVisual *visual;
 397     GdkColormap *colormap;
 398
 399     // MR: This needs a fix for lower gtk+ versions too. Might need to rethink logic (FIXME)
 400 #if defined(__WXGTK20__) && GTK_CHECK_VERSION(2,2,0)
 401     if (!gtk_check_version(2,2,0))
 402     {
 403         wxWindow::Create( parent, id, pos, size, style, name );
 404
 405         m_glWidget = m_wxwindow;
 406
 407         GdkScreen *screen = gtk_widget_get_screen( m_glWidget );
 408         colormap = gdk_screen_get_default_colormap(screen);
 409         visual = gdk_colormap_get_visual(colormap);
 410
 411         if (GDK_VISUAL_XVISUAL(visual)->visualid != vi->visualid)
 412         {
 413             visual = gdk_x11_screen_lookup_visual( screen, vi->visualid );
 414             colormap = gdk_colormap_new(visual, FALSE);
 415         }
 416
 417         gtk_widget_set_colormap( m_glWidget, colormap );
 418     }
 419     else
 420 #endif
 421     {
 422         visual = gdkx_visual_get( vi->visualid );
 423         colormap = gdk_colormap_new( visual, TRUE );
 424
 425         gtk_widget_push_colormap( colormap );
 426         gtk_widget_push_visual( visual );
 427
 428         wxWindow::Create( parent, id, pos, size, style, name );
 429         m_glWidget = m_wxwindow;
 430     }
 431
 432 #ifdef __WXGTK20__
 433     gtk_widget_set_double_buffered( m_glWidget, FALSE );
 434 #endif
 435
 436     gtk_pizza_set_clear( GTK_PIZZA(m_wxwindow), FALSE );
 437
 438     gtk_signal_connect( GTK_OBJECT(m_wxwindow), "realize",
 439                             GTK_SIGNAL_FUNC(gtk_glwindow_realized_callback), (gpointer) this );
 440
 441     gtk_signal_connect( GTK_OBJECT(m_wxwindow), "map",
 442                             GTK_SIGNAL_FUNC(gtk_glwindow_map_callback), (gpointer) this );
 443
 444     gtk_signal_connect( GTK_OBJECT(m_wxwindow), "expose_event",
 445         GTK_SIGNAL_FUNC(gtk_glwindow_expose_callback), (gpointer)this );
 446
 447 #ifndef __WXGTK20__
 448     gtk_signal_connect( GTK_OBJECT(m_wxwindow), "draw",
 449         GTK_SIGNAL_FUNC(gtk_glwindow_draw_callback), (gpointer)this );
 450 #endif
 451
 452     gtk_signal_connect( GTK_OBJECT(m_widget), "size_allocate",
 453         GTK_SIGNAL_FUNC(gtk_glcanvas_size_callback), (gpointer)this );
 454
 455 #ifdef __WXGTK20__
 456     if (gtk_check_version(2,2,0) != NULL)
 457 #endif
 458     {
 459         gtk_widget_pop_visual();
 460         gtk_widget_pop_colormap();
 461     }
 462
 463     // if our parent window is already visible, we had been realized before we
 464     // connected to the "realize" signal and hence our m_glContext hasn't been
 465     // initialized yet and we have to do it now
 466     if (GTK_WIDGET_REALIZED(m_wxwindow))
 467         gtk_glwindow_realized_callback( m_wxwindow, this );
 468
 469     if (GTK_WIDGET_MAPPED(m_wxwindow))
 470         gtk_glwindow_map_callback( m_wxwindow, this );
 471
 472     return TRUE;
 473 }
 474
 475 wxGLCanvas::~wxGLCanvas()
 476 {
 477     GLXFBConfig * fbc = (GLXFBConfig *) m_fbc;
 478     if (fbc && m_canFreeFBC)
 479         XFree( fbc );
 480
 481     XVisualInfo *vi = (XVisualInfo *) m_vi;
 482     if (vi && m_canFreeVi)
 483         XFree( vi );
 484
 485     delete m_glContext;
 486 }
 487
 488 void* wxGLCanvas::ChooseGLVisual(int *attribList)
 489 {
 490     int data[512];
 491     GetGLAttribListFromWX( attribList, data );
 492     attribList = (int*) data;
 493
 494     Display *dpy = GDK_DISPLAY();
 495
 496     return glXChooseVisual( dpy, DefaultScreen(dpy), attribList );
 497 }
 498
 499 void* wxGLCanvas::ChooseGLFBC(int *attribList)
 500 {
 501     int data[512];
 502     GetGLAttribListFromWX( attribList, data );
 503     attribList = (int*) data;
 504
 505     int returned;
 506     return glXChooseFBConfig( GDK_DISPLAY(), DefaultScreen(GDK_DISPLAY()),
 507                               attribList, &returned );
 508 }
 509
 510
 511 void wxGLCanvas::GetGLAttribListFromWX(int *wx_attribList, int *gl_attribList )
 512 {
 513     if (!wx_attribList)
 514     {
 515         if (wxGLCanvas::GetGLXVersion() >= 13)
 516         // leave GLX >= 1.3 choose the default attributes
 517             gl_attribList[0] = 0;
 518         else
 519         {
 520             int i = 0;
 521             // default settings if attriblist = 0
 522             gl_attribList[i++] = GLX_RGBA;
 523             gl_attribList[i++] = GLX_DOUBLEBUFFER;
 524             gl_attribList[i++] = GLX_DEPTH_SIZE;   gl_attribList[i++] = 1;
 525             gl_attribList[i++] = GLX_RED_SIZE;     gl_attribList[i++] = 1;
 526             gl_attribList[i++] = GLX_GREEN_SIZE;   gl_attribList[i++] = 1;
 527             gl_attribList[i++] = GLX_BLUE_SIZE;    gl_attribList[i++] = 1;
 528             gl_attribList[i++] = GLX_ALPHA_SIZE;   gl_attribList[i++] = 0;
 529             gl_attribList[i++] = None;
 530         }
 531     }
 532     else
 533     {
 534         int arg=0, p=0;
 535         while( (wx_attribList[arg]!=0) && (p<510) )
 536         {
 537             switch( wx_attribList[arg++] )
 538             {
 539                 case WX_GL_RGBA:
 540                     if (wxGLCanvas::GetGLXVersion() <= 12)
 541                         // for GLX >= 1.3, GLX_RGBA is useless (setting this flags will crash on most opengl implm)
 542                         gl_attribList[p++] = GLX_RGBA;
 543                     break;
 544                 case WX_GL_BUFFER_SIZE:
 545                     gl_attribList[p++] = GLX_BUFFER_SIZE;
 546                     gl_attribList[p++] = wx_attribList[arg++];
 547                     break;
 548                 case WX_GL_LEVEL:
 549                     gl_attribList[p++] = GLX_LEVEL;
 550                     gl_attribList[p++] = wx_attribList[arg++];
 551                     break;
 552                 case WX_GL_DOUBLEBUFFER:
 553                     if (wxGLCanvas::GetGLXVersion() <= 12)
 554                         gl_attribList[p++] = GLX_DOUBLEBUFFER;
 555                     else
 556                         // for GLX >= 1.3, GLX_DOUBLEBUFFER format is different (1 <=> True)
 557                         // it seems this flag is useless for some hardware opengl implementation.
 558                         // but for Mesa 6.2.1, this flag is used so don't ignore it.
 559                         gl_attribList[p++] = GLX_DOUBLEBUFFER;
 560                     gl_attribList[p++] = 1;
 561                     break;
 562                 case WX_GL_STEREO:
 563                     gl_attribList[p++] = GLX_STEREO;
 564                     break;
 565                 case WX_GL_AUX_BUFFERS:
 566                     gl_attribList[p++] = GLX_AUX_BUFFERS;
 567                     gl_attribList[p++] = wx_attribList[arg++];
 568                     break;
 569                 case WX_GL_MIN_RED:
 570                     gl_attribList[p++] = GLX_RED_SIZE;
 571                     gl_attribList[p++] = wx_attribList[arg++];
 572                     break;
 573                 case WX_GL_MIN_GREEN:
 574                     gl_attribList[p++] = GLX_GREEN_SIZE;
 575                     gl_attribList[p++] = wx_attribList[arg++];
 576                     break;
 577                 case WX_GL_MIN_BLUE:
 578                     gl_attribList[p++] = GLX_BLUE_SIZE;
 579                     gl_attribList[p++] = wx_attribList[arg++];
 580                     break;
 581                 case WX_GL_MIN_ALPHA:
 582                     gl_attribList[p++] = GLX_ALPHA_SIZE;
 583                     gl_attribList[p++] = wx_attribList[arg++];
 584                     break;
 585                 case WX_GL_DEPTH_SIZE:
 586                     gl_attribList[p++] = GLX_DEPTH_SIZE;
 587                     gl_attribList[p++] = wx_attribList[arg++];
 588                     break;
 589                 case WX_GL_STENCIL_SIZE:
 590                     gl_attribList[p++] = GLX_STENCIL_SIZE;
 591                     gl_attribList[p++] = wx_attribList[arg++];
 592                     break;
 593                 case WX_GL_MIN_ACCUM_RED:
 594                     gl_attribList[p++] = GLX_ACCUM_RED_SIZE;
 595                     gl_attribList[p++] = wx_attribList[arg++];
 596                     break;
 597                 case WX_GL_MIN_ACCUM_GREEN:
 598                     gl_attribList[p++] = GLX_ACCUM_GREEN_SIZE;
 599                     gl_attribList[p++] = wx_attribList[arg++];
 600                     break;
 601                 case WX_GL_MIN_ACCUM_BLUE:
 602                     gl_attribList[p++] = GLX_ACCUM_BLUE_SIZE;
 603                     gl_attribList[p++] = wx_attribList[arg++];
 604                     break;
 605                 case WX_GL_MIN_ACCUM_ALPHA:
 606                     gl_attribList[p++] = GLX_ACCUM_ALPHA_SIZE;
 607                     gl_attribList[p++] = wx_attribList[arg++];
 608                     break;
 609                 default:
 610                     break;
 611             }
 612         }
 613
 614         gl_attribList[p] = 0;
 615     }
 616 }
 617
 618 void wxGLCanvas::QueryGLXVersion()
 619 {
 620     if (m_glxVersion == 0)
 621     {
 622         // check the GLX version
 623         int glxMajorVer, glxMinorVer;
 624         bool ok = glXQueryVersion(GDK_DISPLAY(), &glxMajorVer, &glxMinorVer);
 625         wxASSERT_MSG( ok, _T("GLX version not found") );
 626         if (!ok)
 627             m_glxVersion = 10; // 1.0 by default
 628         else
 629             m_glxVersion = glxMajorVer*10 + glxMinorVer;
 630     }
 631 }
 632
 633 int wxGLCanvas::GetGLXVersion()
 634 {
 635     wxASSERT_MSG( m_glxVersion>0, _T("GLX version has not been initialized with wxGLCanvas::QueryGLXVersion()") );
 636     return m_glxVersion;
 637 }
 638
 639
 640 void wxGLCanvas::SwapBuffers()
 641 {
 642     if (m_glContext)
 643         m_glContext->SwapBuffers();
 644 }
 645
 646 void wxGLCanvas::OnSize(wxSizeEvent& WXUNUSED(event))
 647 {
 648 }
 649
 650 void wxGLCanvas::SetCurrent()
 651 {
 652     if (m_glContext)
 653         m_glContext->SetCurrent();
 654 }
 655
 656 void wxGLCanvas::SetColour( const wxChar *colour )
 657 {
 658     if (m_glContext)
 659         m_glContext->SetColour( colour );
 660 }
 661
 662 void wxGLCanvas::OnInternalIdle()
 663 {
 664     if (m_glContext && m_exposed)
 665     {
 666         wxPaintEvent event( GetId() );
 667         event.SetEventObject( this );
 668         GetEventHandler()->ProcessEvent( event );
 669
 670         m_exposed = FALSE;
 671         GetUpdateRegion().Clear();
 672     }
 673
 674     wxWindow::OnInternalIdle();
 675 }
 676
 677
 678
 679 //---------------------------------------------------------------------------
 680 // wxGLApp
 681 //---------------------------------------------------------------------------
 682
 683 IMPLEMENT_CLASS(wxGLApp, wxApp)
 684
 685 wxGLApp::~wxGLApp()
 686 {
 687     if (m_glFBCInfo)
 688         XFree(m_glFBCInfo);
 689     if (m_glVisualInfo)
 690         XFree(m_glVisualInfo);
 691 }
 692
 693 bool wxGLApp::InitGLVisual(int *attribList)
 694 {
 695     wxGLCanvas::QueryGLXVersion();
 696
 697     if (wxGLCanvas::GetGLXVersion() >= 13)
 698     {
 699         // GLX >= 1.3
 700         if (m_glFBCInfo)
 701             XFree(m_glFBCInfo);
 702         m_glFBCInfo = wxGLCanvas::ChooseGLFBC(attribList);
 703
 704         if (m_glFBCInfo)
 705         {
 706             if (m_glVisualInfo)
 707                 XFree(m_glVisualInfo);
 708             m_glVisualInfo = glXGetVisualFromFBConfig(GDK_DISPLAY(), ((GLXFBConfig *)m_glFBCInfo)[0]);
 709         }
 710         return (m_glFBCInfo != NULL) && (m_glVisualInfo != NULL);
 711     }
 712     else
 713     {
 714         // GLX <= 1.2
 715         if (m_glVisualInfo)
 716             XFree(m_glVisualInfo);
 717         m_glVisualInfo = wxGLCanvas::ChooseGLVisual(attribList);
 718         return m_glVisualInfo != NULL;
 719     }
 720 }
 721
 722 #endif
 723     // wxUSE_GLCANVAS