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 #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/gtk1/win_gtk.h"
  32
  33 // DLL options compatibility check:
  34 #include "wx/build.h"
  35 WX_CHECK_BUILD_OPTIONS("wxGL")
  36
  37
  38 //---------------------------------------------------------------------------
  39 // static variables
  40 //---------------------------------------------------------------------------
  41 int wxGLCanvas::m_glxVersion = 0;
  42
  43 //---------------------------------------------------------------------------
  44 // global data
  45 //---------------------------------------------------------------------------
  46
  47 XVisualInfo *g_vi = (XVisualInfo*) NULL;
  48 //-----------------------------------------------------------------------------
  49 // idle system
  50 //-----------------------------------------------------------------------------
  51
  52 extern void wxapp_install_idle_handler();
  53 extern bool g_isIdle;
  54
  55 //---------------------------------------------------------------------------
  56 // wxGLContext
  57 //---------------------------------------------------------------------------
  58
  59 IMPLEMENT_CLASS(wxGLContext,wxObject)
  60
  61 wxGLContext::wxGLContext( bool WXUNUSED(isRGB), wxWindow *win, const wxPalette& WXUNUSED(palette) )
  62 {
  63     m_window = win;
  64     m_widget = win->m_wxwindow;
  65
  66     wxGLCanvas *gc = (wxGLCanvas*) win;
  67
  68     if (wxGLCanvas::GetGLXVersion() >= 13)
  69     {
  70         // GLX >= 1.3
  71         GLXFBConfig *fbc = gc->m_fbc;
  72         wxCHECK_RET( fbc, _T("invalid GLXFBConfig for OpenGl") );
  73         m_glContext = glXCreateNewContext( GDK_DISPLAY(), fbc[0], GLX_RGBA_TYPE, None, GL_TRUE );
  74     }
  75     else
  76     {
  77         // GLX <= 1.2
  78         XVisualInfo *vi = (XVisualInfo *) gc->m_vi;
  79         wxCHECK_RET( vi, _T("invalid visual for OpenGl") );
  80         m_glContext = glXCreateContext( GDK_DISPLAY(), vi, None, GL_TRUE );
  81     }
  82
  83     wxCHECK_RET( m_glContext, _T("Couldn't create OpenGl context") );
  84 }
  85
  86 wxGLContext::wxGLContext(
  87                bool WXUNUSED(isRGB), wxWindow *win,
  88                const wxPalette& WXUNUSED(palette),
  89                const wxGLContext *other        /* for sharing display lists */
  90 )
  91 {
  92     m_window = win;
  93     m_widget = win->m_wxwindow;
  94
  95     wxGLCanvas *gc = (wxGLCanvas*) win;
  96
  97     if (wxGLCanvas::GetGLXVersion() >= 13)
  98     {
  99         // GLX >= 1.3
 100         GLXFBConfig *fbc = gc->m_fbc;
 101         wxCHECK_RET( fbc, _T("invalid GLXFBConfig for OpenGl") );
 102         m_glContext = glXCreateNewContext( GDK_DISPLAY(), fbc[0], GLX_RGBA_TYPE,
 103                                            other ? other->m_glContext : None,
 104                                            GL_TRUE );
 105     }
 106     else
 107     {
 108         // GLX <= 1.2
 109         XVisualInfo *vi = (XVisualInfo *) gc->m_vi;
 110         wxCHECK_RET( vi, _T("invalid visual for OpenGl") );
 111         m_glContext = glXCreateContext( GDK_DISPLAY(), vi,
 112                                         other ? other->m_glContext : None,
 113                                         GL_TRUE );
 114     }
 115
 116     if ( !m_glContext )
 117     {
 118         wxFAIL_MSG( _T("Couldn't create OpenGl context") );
 119     }
 120 }
 121
 122 wxGLContext::~wxGLContext()
 123 {
 124     if (!m_glContext) return;
 125
 126     if (m_glContext == glXGetCurrentContext())
 127     {
 128         if (wxGLCanvas::GetGLXVersion() >= 13)
 129             // GLX >= 1.3
 130             glXMakeContextCurrent( GDK_DISPLAY(), None, None, NULL);
 131         else
 132             // GLX <= 1.2
 133             glXMakeCurrent( GDK_DISPLAY(), None, NULL);
 134     }
 135
 136     glXDestroyContext( GDK_DISPLAY(), m_glContext );
 137 }
 138
 139 void wxGLContext::SwapBuffers()
 140 {
 141     if (m_glContext)
 142     {
 143         GdkWindow *window = GTK_PIZZA(m_widget)->bin_window;
 144         glXSwapBuffers( GDK_DISPLAY(), GDK_WINDOW_XWINDOW( window ) );
 145     }
 146 }
 147
 148 void wxGLContext::SetCurrent()
 149 {
 150     if (m_glContext)
 151     {
 152         GdkWindow *window = GTK_PIZZA(m_widget)->bin_window;
 153
 154         if (wxGLCanvas::GetGLXVersion() >= 13)
 155             // GLX >= 1.3
 156             glXMakeContextCurrent( GDK_DISPLAY(), GDK_WINDOW_XWINDOW(window),
 157                                    GDK_WINDOW_XWINDOW(window), m_glContext );
 158         else
 159             // GLX <= 1.2
 160             glXMakeCurrent( GDK_DISPLAY(), GDK_WINDOW_XWINDOW(window), m_glContext );
 161     }
 162 }
 163
 164 void wxGLContext::SetColour(const wxChar *colour)
 165 {
 166     wxColour col = wxTheColourDatabase->Find(colour);
 167     if (col.Ok())
 168     {
 169         float r = (float)(col.Red()/256.0);
 170         float g = (float)(col.Green()/256.0);
 171         float b = (float)(col.Blue()/256.0);
 172         glColor3f( r, g, b);
 173     }
 174 }
 175
 176 void wxGLContext::SetupPixelFormat()
 177 {
 178 }
 179
 180 void wxGLContext::SetupPalette( const wxPalette& WXUNUSED(palette) )
 181 {
 182 }
 183
 184 wxPalette wxGLContext::CreateDefaultPalette()
 185 {
 186     return wxNullPalette;
 187 }
 188
 189 //-----------------------------------------------------------------------------
 190 // "realize" from m_wxwindow
 191 //-----------------------------------------------------------------------------
 192
 193 extern "C" {
 194 static gint
 195 gtk_glwindow_realized_callback( GtkWidget *WXUNUSED(widget), wxGLCanvas *win )
 196 {
 197     if ( !win->m_glContext )
 198     {
 199         wxGLContext *share = win->m_sharedContext;
 200         if ( !share && win->m_sharedContextOf )
 201             share = win->m_sharedContextOf->GetContext();
 202
 203         win->m_glContext = new wxGLContext( TRUE, win, wxNullPalette, share );
 204     }
 205
 206     return FALSE;
 207 }
 208 }
 209
 210 //-----------------------------------------------------------------------------
 211 // "map" from m_wxwindow
 212 //-----------------------------------------------------------------------------
 213
 214 extern "C" {
 215 static gint
 216 gtk_glwindow_map_callback( GtkWidget * WXUNUSED(widget), wxGLCanvas *win )
 217 {
 218     if (win->m_glContext/* && win->m_exposed*/)
 219     {
 220         wxPaintEvent event( win->GetId() );
 221         event.SetEventObject( win );
 222         win->GetEventHandler()->ProcessEvent( event );
 223
 224         win->m_exposed = FALSE;
 225         win->GetUpdateRegion().Clear();
 226     }
 227
 228     return FALSE;
 229 }
 230 }
 231
 232 //-----------------------------------------------------------------------------
 233 // "expose_event" of m_wxwindow
 234 //-----------------------------------------------------------------------------
 235
 236 extern "C" {
 237 static void
 238 gtk_glwindow_expose_callback( GtkWidget *WXUNUSED(widget), GdkEventExpose *gdk_event, wxGLCanvas *win )
 239 {
 240     if (g_isIdle)
 241         wxapp_install_idle_handler();
 242
 243     win->m_exposed = TRUE;
 244
 245     win->GetUpdateRegion().Union( gdk_event->area.x,
 246                                   gdk_event->area.y,
 247                                   gdk_event->area.width,
 248                                   gdk_event->area.height );
 249 }
 250 }
 251
 252 //-----------------------------------------------------------------------------
 253 // "draw" of m_wxwindow
 254 //-----------------------------------------------------------------------------
 255
 256 extern "C" {
 257 static void
 258 gtk_glwindow_draw_callback( GtkWidget *WXUNUSED(widget), GdkRectangle *rect, wxGLCanvas *win )
 259 {
 260     if (g_isIdle)
 261         wxapp_install_idle_handler();
 262
 263     win->m_exposed = TRUE;
 264
 265     win->GetUpdateRegion().Union( rect->x, rect->y,
 266                                   rect->width, rect->height );
 267 }
 268 }
 269
 270 //-----------------------------------------------------------------------------
 271 // "size_allocate" of m_wxwindow
 272 //-----------------------------------------------------------------------------
 273
 274 extern "C" {
 275 static void
 276 gtk_glcanvas_size_callback( GtkWidget *WXUNUSED(widget), GtkAllocation* alloc, wxGLCanvas *win )
 277 {
 278     if (g_isIdle)
 279         wxapp_install_idle_handler();
 280
 281     if (!win->m_hasVMT)
 282         return;
 283
 284     wxSizeEvent event( wxSize(win->m_width,win->m_height), win->GetId() );
 285     event.SetEventObject( win );
 286     win->GetEventHandler()->ProcessEvent( event );
 287 }
 288 }
 289
 290 //---------------------------------------------------------------------------
 291 // wxGlCanvas
 292 //---------------------------------------------------------------------------
 293
 294 IMPLEMENT_CLASS(wxGLCanvas, wxWindow)
 295
 296 BEGIN_EVENT_TABLE(wxGLCanvas, wxWindow)
 297     EVT_SIZE(wxGLCanvas::OnSize)
 298 END_EVENT_TABLE()
 299
 300 wxGLCanvas::wxGLCanvas( wxWindow *parent, wxWindowID id,
 301                         const wxPoint& pos, const wxSize& size,
 302                         long style, const wxString& name,
 303                         int *attribList,
 304                         const wxPalette& palette )
 305 {
 306     Create( parent, NULL, NULL, id, pos, size, style, name, attribList, palette );
 307 }
 308
 309 wxGLCanvas::wxGLCanvas( wxWindow *parent,
 310                         const wxGLContext *shared,
 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     Create( parent, shared, NULL, id, pos, size, style, name, attribList, palette );
 318 }
 319
 320 wxGLCanvas::wxGLCanvas( wxWindow *parent,
 321                         const wxGLCanvas *shared,
 322                         wxWindowID id,
 323                         const wxPoint& pos, const wxSize& size,
 324                         long style, const wxString& name,
 325                         int *attribList,
 326                         const wxPalette& palette )
 327 {
 328     Create( parent, NULL, shared, id, pos, size, style, name, attribList, palette );
 329 }
 330
 331 bool wxGLCanvas::Create( wxWindow *parent,
 332                          const wxGLContext *shared,
 333                          const wxGLCanvas *shared_context_of,
 334                          wxWindowID id,
 335                          const wxPoint& pos, const wxSize& size,
 336                          long style, const wxString& name,
 337                          int *attribList,
 338                          const wxPalette& palette)
 339 {
 340     m_sharedContext = (wxGLContext*)shared;  // const_cast
 341     m_sharedContextOf = (wxGLCanvas*)shared_context_of;  // const_cast
 342     m_glContext = (wxGLContext*) NULL;
 343
 344     m_exposed = FALSE;
 345     m_noExpose = TRUE;
 346     m_nativeSizeEvent = TRUE;
 347     m_fbc = NULL;
 348     m_vi = NULL;
 349
 350     // to be sure the glx version is known
 351     wxGLCanvas::QueryGLXVersion();
 352
 353     if (wxGLCanvas::GetGLXVersion() >= 13)
 354     {
 355         // GLX >= 1.3 uses a GLXFBConfig
 356         GLXFBConfig * fbc = NULL;
 357         if (wxTheApp->m_glFBCInfo != NULL)
 358         {
 359             fbc = (GLXFBConfig *) wxTheApp->m_glFBCInfo;
 360             m_canFreeFBC = FALSE; // owned by wxTheApp - don't free upon destruction
 361         }
 362         else
 363         {
 364             fbc = (GLXFBConfig *) wxGLCanvas::ChooseGLFBC(attribList);
 365             m_canFreeFBC = TRUE;
 366         }
 367         m_fbc = fbc;  // save for later use
 368         wxCHECK_MSG( m_fbc, FALSE, _T("required FBConfig couldn't be found") );
 369     }
 370
 371     XVisualInfo *vi = NULL;
 372     if (wxTheApp->m_glVisualInfo != NULL)
 373     {
 374         vi = (XVisualInfo *)wxTheApp->m_glVisualInfo;
 375         m_canFreeVi = FALSE; // owned by wxTheApp - don't free upon destruction
 376     }
 377     else
 378     {
 379         if (wxGLCanvas::GetGLXVersion() >= 13)
 380         // GLX >= 1.3
 381             vi = glXGetVisualFromFBConfig(GDK_DISPLAY(), m_fbc[0]);
 382         else
 383             // GLX <= 1.2
 384             vi = (XVisualInfo *) ChooseGLVisual(attribList);
 385
 386         m_canFreeVi = TRUE;
 387     }
 388
 389     m_vi = vi;  // save for later use
 390
 391     wxCHECK_MSG( m_vi, FALSE, _T("required visual couldn't be found") );
 392     GdkVisual *visual;
 393     GdkColormap *colormap;
 394
 395     // MR: This needs a fix for lower gtk+ versions too. Might need to rethink logic (FIXME)
 396 #if 0
 397     if (!gtk_check_version(2,2,0))
 398     {
 399         wxWindow::Create( parent, id, pos, size, style, name );
 400
 401         m_glWidget = m_wxwindow;
 402
 403         GdkScreen *screen = gtk_widget_get_screen( m_glWidget );
 404         colormap = gdk_screen_get_default_colormap(screen);
 405         visual = gdk_colormap_get_visual(colormap);
 406
 407         if (GDK_VISUAL_XVISUAL(visual)->visualid != vi->visualid)
 408         {
 409             visual = gdk_x11_screen_lookup_visual( screen, vi->visualid );
 410             colormap = gdk_colormap_new(visual, FALSE);
 411         }
 412
 413         gtk_widget_set_colormap( m_glWidget, colormap );
 414     }
 415     else
 416 #endif
 417     {
 418         visual = gdkx_visual_get( vi->visualid );
 419         colormap = gdk_colormap_new( visual, TRUE );
 420
 421         gtk_widget_push_colormap( colormap );
 422         gtk_widget_push_visual( visual );
 423
 424         wxWindow::Create( parent, id, pos, size, style, name );
 425         m_glWidget = m_wxwindow;
 426     }
 427
 428     gtk_pizza_set_clear( GTK_PIZZA(m_wxwindow), FALSE );
 429
 430     gtk_signal_connect( GTK_OBJECT(m_wxwindow), "realize",
 431                             GTK_SIGNAL_FUNC(gtk_glwindow_realized_callback), (gpointer) this );
 432
 433     gtk_signal_connect( GTK_OBJECT(m_wxwindow), "map",
 434                             GTK_SIGNAL_FUNC(gtk_glwindow_map_callback), (gpointer) this );
 435
 436     gtk_signal_connect( GTK_OBJECT(m_wxwindow), "expose_event",
 437         GTK_SIGNAL_FUNC(gtk_glwindow_expose_callback), (gpointer)this );
 438
 439     gtk_signal_connect( GTK_OBJECT(m_wxwindow), "draw",
 440         GTK_SIGNAL_FUNC(gtk_glwindow_draw_callback), (gpointer)this );
 441
 442     gtk_signal_connect( GTK_OBJECT(m_widget), "size_allocate",
 443         GTK_SIGNAL_FUNC(gtk_glcanvas_size_callback), (gpointer)this );
 444
 445     gtk_widget_pop_visual();
 446     gtk_widget_pop_colormap();
 447
 448     // if our parent window is already visible, we had been realized before we
 449     // connected to the "realize" signal and hence our m_glContext hasn't been
 450     // initialized yet and we have to do it now
 451     if (GTK_WIDGET_REALIZED(m_wxwindow))
 452         gtk_glwindow_realized_callback( m_wxwindow, this );
 453
 454     if (GTK_WIDGET_MAPPED(m_wxwindow))
 455         gtk_glwindow_map_callback( m_wxwindow, this );
 456
 457     return TRUE;
 458 }
 459
 460 wxGLCanvas::~wxGLCanvas()
 461 {
 462     GLXFBConfig * fbc = (GLXFBConfig *) m_fbc;
 463     if (fbc && m_canFreeFBC)
 464         XFree( fbc );
 465
 466     XVisualInfo *vi = (XVisualInfo *) m_vi;
 467     if (vi && m_canFreeVi)
 468         XFree( vi );
 469
 470     delete m_glContext;
 471 }
 472
 473 void* wxGLCanvas::ChooseGLVisual(int *attribList)
 474 {
 475     int data[512];
 476     GetGLAttribListFromWX( attribList, data );
 477     attribList = (int*) data;
 478
 479     Display *dpy = GDK_DISPLAY();
 480
 481     return glXChooseVisual( dpy, DefaultScreen(dpy), attribList );
 482 }
 483
 484 void* wxGLCanvas::ChooseGLFBC(int *attribList)
 485 {
 486     int data[512];
 487     GetGLAttribListFromWX( attribList, data );
 488     attribList = (int*) data;
 489
 490     int returned;
 491     return glXChooseFBConfig( GDK_DISPLAY(), DefaultScreen(GDK_DISPLAY()),
 492                               attribList, &returned );
 493 }
 494
 495
 496 void wxGLCanvas::GetGLAttribListFromWX(int *wx_attribList, int *gl_attribList )
 497 {
 498     if (!wx_attribList)
 499     {
 500         if (wxGLCanvas::GetGLXVersion() >= 13)
 501         // leave GLX >= 1.3 choose the default attributes
 502             gl_attribList[0] = 0;
 503         else
 504         {
 505             int i = 0;
 506             // default settings if attriblist = 0
 507             gl_attribList[i++] = GLX_RGBA;
 508             gl_attribList[i++] = GLX_DOUBLEBUFFER;
 509             gl_attribList[i++] = GLX_DEPTH_SIZE;   gl_attribList[i++] = 1;
 510             gl_attribList[i++] = GLX_RED_SIZE;     gl_attribList[i++] = 1;
 511             gl_attribList[i++] = GLX_GREEN_SIZE;   gl_attribList[i++] = 1;
 512             gl_attribList[i++] = GLX_BLUE_SIZE;    gl_attribList[i++] = 1;
 513             gl_attribList[i++] = GLX_ALPHA_SIZE;   gl_attribList[i++] = 0;
 514             gl_attribList[i++] = None;
 515         }
 516     }
 517     else
 518     {
 519         int arg=0, p=0;
 520         while( (wx_attribList[arg]!=0) && (p<510) )
 521         {
 522             switch( wx_attribList[arg++] )
 523             {
 524                 case WX_GL_RGBA:
 525                     if (wxGLCanvas::GetGLXVersion() <= 12)
 526                         // for GLX >= 1.3, GLX_RGBA is useless (setting this flags will crash on most opengl implm)
 527                         gl_attribList[p++] = GLX_RGBA;
 528                     break;
 529                 case WX_GL_BUFFER_SIZE:
 530                     gl_attribList[p++] = GLX_BUFFER_SIZE;
 531                     gl_attribList[p++] = wx_attribList[arg++];
 532                     break;
 533                 case WX_GL_LEVEL:
 534                     gl_attribList[p++] = GLX_LEVEL;
 535                     gl_attribList[p++] = wx_attribList[arg++];
 536                     break;
 537                 case WX_GL_DOUBLEBUFFER:
 538                     if (wxGLCanvas::GetGLXVersion() <= 12)
 539                         gl_attribList[p++] = GLX_DOUBLEBUFFER;
 540                     else
 541                         // for GLX >= 1.3, GLX_DOUBLEBUFFER format is different (1 <=> True)
 542                         // it seems this flag is useless for some hardware opengl implementation.
 543                         // but for Mesa 6.2.1, this flag is used so don't ignore it.
 544                         gl_attribList[p++] = GLX_DOUBLEBUFFER;
 545                     gl_attribList[p++] = 1;
 546                     break;
 547                 case WX_GL_STEREO:
 548                     gl_attribList[p++] = GLX_STEREO;
 549                     break;
 550                 case WX_GL_AUX_BUFFERS:
 551                     gl_attribList[p++] = GLX_AUX_BUFFERS;
 552                     gl_attribList[p++] = wx_attribList[arg++];
 553                     break;
 554                 case WX_GL_MIN_RED:
 555                     gl_attribList[p++] = GLX_RED_SIZE;
 556                     gl_attribList[p++] = wx_attribList[arg++];
 557                     break;
 558                 case WX_GL_MIN_GREEN:
 559                     gl_attribList[p++] = GLX_GREEN_SIZE;
 560                     gl_attribList[p++] = wx_attribList[arg++];
 561                     break;
 562                 case WX_GL_MIN_BLUE:
 563                     gl_attribList[p++] = GLX_BLUE_SIZE;
 564                     gl_attribList[p++] = wx_attribList[arg++];
 565                     break;
 566                 case WX_GL_MIN_ALPHA:
 567                     gl_attribList[p++] = GLX_ALPHA_SIZE;
 568                     gl_attribList[p++] = wx_attribList[arg++];
 569                     break;
 570                 case WX_GL_DEPTH_SIZE:
 571                     gl_attribList[p++] = GLX_DEPTH_SIZE;
 572                     gl_attribList[p++] = wx_attribList[arg++];
 573                     break;
 574                 case WX_GL_STENCIL_SIZE:
 575                     gl_attribList[p++] = GLX_STENCIL_SIZE;
 576                     gl_attribList[p++] = wx_attribList[arg++];
 577                     break;
 578                 case WX_GL_MIN_ACCUM_RED:
 579                     gl_attribList[p++] = GLX_ACCUM_RED_SIZE;
 580                     gl_attribList[p++] = wx_attribList[arg++];
 581                     break;
 582                 case WX_GL_MIN_ACCUM_GREEN:
 583                     gl_attribList[p++] = GLX_ACCUM_GREEN_SIZE;
 584                     gl_attribList[p++] = wx_attribList[arg++];
 585                     break;
 586                 case WX_GL_MIN_ACCUM_BLUE:
 587                     gl_attribList[p++] = GLX_ACCUM_BLUE_SIZE;
 588                     gl_attribList[p++] = wx_attribList[arg++];
 589                     break;
 590                 case WX_GL_MIN_ACCUM_ALPHA:
 591                     gl_attribList[p++] = GLX_ACCUM_ALPHA_SIZE;
 592                     gl_attribList[p++] = wx_attribList[arg++];
 593                     break;
 594                 default:
 595                     break;
 596             }
 597         }
 598
 599         gl_attribList[p] = 0;
 600     }
 601 }
 602
 603 void wxGLCanvas::QueryGLXVersion()
 604 {
 605     if (m_glxVersion == 0)
 606     {
 607         // check the GLX version
 608         int glxMajorVer, glxMinorVer;
 609         bool ok = glXQueryVersion(GDK_DISPLAY(), &glxMajorVer, &glxMinorVer);
 610         wxASSERT_MSG( ok, _T("GLX version not found") );
 611         if (!ok)
 612             m_glxVersion = 10; // 1.0 by default
 613         else
 614             m_glxVersion = glxMajorVer*10 + glxMinorVer;
 615     }
 616 }
 617
 618 int wxGLCanvas::GetGLXVersion()
 619 {
 620     wxASSERT_MSG( m_glxVersion>0, _T("GLX version has not been initialized with wxGLCanvas::QueryGLXVersion()") );
 621     return m_glxVersion;
 622 }
 623
 624
 625 void wxGLCanvas::SwapBuffers()
 626 {
 627     if (m_glContext)
 628         m_glContext->SwapBuffers();
 629 }
 630
 631 void wxGLCanvas::OnSize(wxSizeEvent& WXUNUSED(event))
 632 {
 633 }
 634
 635 void wxGLCanvas::SetCurrent()
 636 {
 637     if (m_glContext)
 638         m_glContext->SetCurrent();
 639 }
 640
 641 void wxGLCanvas::SetColour( const wxChar *colour )
 642 {
 643     if (m_glContext)
 644         m_glContext->SetColour( colour );
 645 }
 646
 647 void wxGLCanvas::OnInternalIdle()
 648 {
 649     if (m_glContext && m_exposed)
 650     {
 651         wxPaintEvent event( GetId() );
 652         event.SetEventObject( this );
 653         GetEventHandler()->ProcessEvent( event );
 654
 655         m_exposed = FALSE;
 656         GetUpdateRegion().Clear();
 657     }
 658
 659     wxWindow::OnInternalIdle();
 660 }
 661
 662
 663
 664 //---------------------------------------------------------------------------
 665 // wxGLApp
 666 //---------------------------------------------------------------------------
 667
 668 IMPLEMENT_CLASS(wxGLApp, wxApp)
 669
 670 wxGLApp::~wxGLApp()
 671 {
 672     if (m_glFBCInfo)
 673         XFree(m_glFBCInfo);
 674     if (m_glVisualInfo)
 675         XFree(m_glVisualInfo);
 676 }
 677
 678 bool wxGLApp::InitGLVisual(int *attribList)
 679 {
 680     wxGLCanvas::QueryGLXVersion();
 681
 682     if (wxGLCanvas::GetGLXVersion() >= 13)
 683     {
 684         // GLX >= 1.3
 685         if (m_glFBCInfo)
 686             XFree(m_glFBCInfo);
 687         m_glFBCInfo = wxGLCanvas::ChooseGLFBC(attribList);
 688
 689         if (m_glFBCInfo)
 690         {
 691             if (m_glVisualInfo)
 692                 XFree(m_glVisualInfo);
 693             m_glVisualInfo = glXGetVisualFromFBConfig(GDK_DISPLAY(), ((GLXFBConfig *)m_glFBCInfo)[0]);
 694         }
 695         return (m_glFBCInfo != NULL) && (m_glVisualInfo != NULL);
 696     }
 697     else
 698     {
 699         // GLX <= 1.2
 700         if (m_glVisualInfo)
 701             XFree(m_glVisualInfo);
 702         m_glVisualInfo = wxGLCanvas::ChooseGLVisual(attribList);
 703         return m_glVisualInfo != NULL;
 704     }
 705 }
 706
 707 #endif
 708     // wxUSE_GLCANVAS