X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/a6f5aa49cf93fc19c776bcce0a7872bdc9707afb..e5b41495b419fdbdcaba37e79da1b4dda72ee055:/src/gtk1/glcanvas.cpp

diff --git a/src/gtk1/glcanvas.cpp b/src/gtk1/glcanvas.cpp
index c15057112d..235c0de0d7 100644
--- a/src/gtk1/glcanvas.cpp
+++ b/src/gtk1/glcanvas.cpp
@@ -1,43 +1,52 @@
 /////////////////////////////////////////////////////////////////////////////
-// Name:        glcanvas.cpp
-// Purpose:     wxGLCanvas, for using OpenGL/Mesa with wxWindows and GTK
+// Name:        src/gtk1/glcanvas.cpp
+// Purpose:     wxGLCanvas, for using OpenGL/Mesa with wxWidgets and GTK
 // Author:      Robert Roebling
 // Modified by:
 // Created:     17/08/98
 // RCS-ID:      $Id$
 // Copyright:   (c) Robert Roebling
-// Licence:   	wxWindows licence
+// Licence:     wxWindows licence
 /////////////////////////////////////////////////////////////////////////////
 
-#ifdef __GNUG__
-#pragma implementation "glcanvas.h"
-#endif
-
-#include "wx/setup.h"
+// For compilers that support precompilation, includes "wx.h".
+#include "wx/wxprec.h"
 
 #if wxUSE_GLCANVAS
 
 #include "wx/glcanvas.h"
 
-#include "wx/frame.h"
-#include "wx/colour.h"
-#include "wx/module.h"
-#include "wx/app.h"
+#ifndef WX_PRECOMP
+    #include "wx/app.h"
+    #include "wx/frame.h"
+    #include "wx/colour.h"
+    #include "wx/module.h"
+#endif // WX_PRECOMP
 
-extern "C" {
+extern "C"
+{
 #include "gtk/gtk.h"
 #include "gdk/gdk.h"
 #include "gdk/gdkx.h"
 }
 
-#include "wx/gtk/win_gtk.h"
+#include "wx/gtk1/win_gtk.h"
+
+// DLL options compatibility check:
+#include "wx/build.h"
+WX_CHECK_BUILD_OPTIONS("wxGL")
+
+
+//---------------------------------------------------------------------------
+// static variables
+//---------------------------------------------------------------------------
+int wxGLCanvas::m_glxVersion = 0;
 
 //---------------------------------------------------------------------------
 // global data
 //---------------------------------------------------------------------------
 
 XVisualInfo *g_vi = (XVisualInfo*) NULL;
-
 //-----------------------------------------------------------------------------
 // idle system
 //-----------------------------------------------------------------------------
@@ -57,17 +66,27 @@ wxGLContext::wxGLContext( bool WXUNUSED(isRGB), wxWindow *win, const wxPalette&
     m_widget = win->m_wxwindow;
 
     wxGLCanvas *gc = (wxGLCanvas*) win;
-    XVisualInfo *vi = (XVisualInfo *) gc->m_vi;
-    
-    wxCHECK_RET( vi, "invalid visual for OpenGl" );
-    
-    m_glContext = glXCreateContext( GDK_DISPLAY(), vi, None, GL_TRUE );
-  
-    wxCHECK_RET( m_glContext, "Couldn't create OpenGl context" );
+
+    if (wxGLCanvas::GetGLXVersion() >= 13)
+    {
+        // GLX >= 1.3
+        GLXFBConfig *fbc = gc->m_fbc;
+        wxCHECK_RET( fbc, _T("invalid GLXFBConfig for OpenGl") );
+        m_glContext = glXCreateNewContext( GDK_DISPLAY(), fbc[0], GLX_RGBA_TYPE, None, GL_TRUE );
+    }
+    else
+    {
+        // GLX <= 1.2
+        XVisualInfo *vi = (XVisualInfo *) gc->m_vi;
+        wxCHECK_RET( vi, _T("invalid visual for OpenGl") );
+        m_glContext = glXCreateContext( GDK_DISPLAY(), vi, None, GL_TRUE );
+    }
+
+    wxCHECK_RET( m_glContext, _T("Couldn't create OpenGl context") );
 }
 
-wxGLContext::wxGLContext( 
-               bool WXUNUSED(isRGB), wxWindow *win, 
+wxGLContext::wxGLContext(
+               bool WXUNUSED(isRGB), wxWindow *win,
                const wxPalette& WXUNUSED(palette),
                const wxGLContext *other        /* for sharing display lists */
 )
@@ -76,27 +95,46 @@ wxGLContext::wxGLContext(
     m_widget = win->m_wxwindow;
 
     wxGLCanvas *gc = (wxGLCanvas*) win;
-    XVisualInfo *vi = (XVisualInfo *) gc->m_vi;
-    
-    wxCHECK_RET( vi, "invalid visual for OpenGl" );
-    
-    if( other != 0 )
-        m_glContext = glXCreateContext( GDK_DISPLAY(), vi, other->m_glContext, GL_TRUE );
+
+    if (wxGLCanvas::GetGLXVersion() >= 13)
+    {
+        // GLX >= 1.3
+        GLXFBConfig *fbc = gc->m_fbc;
+        wxCHECK_RET( fbc, _T("invalid GLXFBConfig for OpenGl") );
+        m_glContext = glXCreateNewContext( GDK_DISPLAY(), fbc[0], GLX_RGBA_TYPE,
+                                           other ? other->m_glContext : None,
+                                           GL_TRUE );
+    }
     else
-        m_glContext = glXCreateContext( GDK_DISPLAY(), vi, None, GL_TRUE );
-    
-    wxCHECK_RET( m_glContext, "Couldn't create OpenGl context" );
+    {
+        // GLX <= 1.2
+        XVisualInfo *vi = (XVisualInfo *) gc->m_vi;
+        wxCHECK_RET( vi, _T("invalid visual for OpenGl") );
+        m_glContext = glXCreateContext( GDK_DISPLAY(), vi,
+                                        other ? other->m_glContext : None,
+                                        GL_TRUE );
+    }
+
+    if ( !m_glContext )
+    {
+        wxFAIL_MSG( _T("Couldn't create OpenGl context") );
+    }
 }
 
 wxGLContext::~wxGLContext()
 {
     if (!m_glContext) return;
-    
+
     if (m_glContext == glXGetCurrentContext())
     {
-        glXMakeCurrent( GDK_DISPLAY(), None, NULL);
+        if (wxGLCanvas::GetGLXVersion() >= 13)
+            // GLX >= 1.3
+            glXMakeContextCurrent( GDK_DISPLAY(), None, None, NULL);
+        else
+            // GLX <= 1.2
+            glXMakeCurrent( GDK_DISPLAY(), None, NULL);
     }
-	
+
     glXDestroyContext( GDK_DISPLAY(), m_glContext );
 }
 
@@ -111,24 +149,28 @@ void wxGLContext::SwapBuffers()
 
 void wxGLContext::SetCurrent()
 {
-    if (m_glContext) 
-    { 
+    if (m_glContext)
+    {
         GdkWindow *window = GTK_PIZZA(m_widget)->bin_window;
-        glXMakeCurrent( GDK_DISPLAY(), GDK_WINDOW_XWINDOW(window), m_glContext );
+
+        if (wxGLCanvas::GetGLXVersion() >= 13)
+            // GLX >= 1.3
+            glXMakeContextCurrent( GDK_DISPLAY(), GDK_WINDOW_XWINDOW(window),
+                                   GDK_WINDOW_XWINDOW(window), m_glContext );
+        else
+            // GLX <= 1.2
+            glXMakeCurrent( GDK_DISPLAY(), GDK_WINDOW_XWINDOW(window), m_glContext );
     }
 }
 
-void wxGLContext::SetColour(const char *colour)
+void wxGLContext::SetColour(const wxChar *colour)
 {
-    float r = 0.0;
-    float g = 0.0;
-    float b = 0.0;
-    wxColour *col = wxTheColourDatabase->FindColour(colour);
-    if (col)
+    wxColour col = wxTheColourDatabase->Find(colour);
+    if (col.Ok())
     {
-        r = (float)(col->Red()/256.0);
-        g = (float)(col->Green()/256.0);
-        b = (float)(col->Blue()/256.0);
+        float r = (float)(col.Red()/256.0);
+        float g = (float)(col.Green()/256.0);
+        float b = (float)(col.Blue()/256.0);
         glColor3f( r, g, b);
     }
 }
@@ -150,21 +192,28 @@ wxPalette wxGLContext::CreateDefaultPalette()
 // "realize" from m_wxwindow
 //-----------------------------------------------------------------------------
 
+extern "C" {
 static gint
-gtk_glwindow_realized_callback( GtkWidget * WXUNUSED(widget), wxGLCanvas *win )
+gtk_glwindow_realized_callback( GtkWidget *WXUNUSED(widget), wxGLCanvas *win )
 {
-    wxGLContext *share= win->m_sharedContext;
-    if (share==NULL && win->m_sharedContextOf) share=win->m_sharedContextOf->GetContext();
+    if ( !win->m_glContext )
+    {
+        wxGLContext *share = win->m_sharedContext;
+        if ( !share && win->m_sharedContextOf )
+            share = win->m_sharedContextOf->GetContext();
 
-    win->m_glContext = new wxGLContext( TRUE, win, wxNullPalette, share );
+        win->m_glContext = new wxGLContext( TRUE, win, wxNullPalette, share );
+    }
 
     return FALSE;
 }
+}
 
 //-----------------------------------------------------------------------------
 // "map" from m_wxwindow
 //-----------------------------------------------------------------------------
 
+extern "C" {
 static gint
 gtk_glwindow_map_callback( GtkWidget * WXUNUSED(widget), wxGLCanvas *win )
 {
@@ -174,52 +223,58 @@ gtk_glwindow_map_callback( GtkWidget * WXUNUSED(widget), wxGLCanvas *win )
         event.SetEventObject( win );
         win->GetEventHandler()->ProcessEvent( event );
 
-        win->m_exposed = FALSE;
+        win->m_exposed = false;
         win->GetUpdateRegion().Clear();
     }
 
     return FALSE;
 }
+}
 
 //-----------------------------------------------------------------------------
 // "expose_event" of m_wxwindow
 //-----------------------------------------------------------------------------
 
-static void 
+extern "C" {
+static void
 gtk_glwindow_expose_callback( GtkWidget *WXUNUSED(widget), GdkEventExpose *gdk_event, wxGLCanvas *win )
 {
-    if (g_isIdle) 
+    if (g_isIdle)
         wxapp_install_idle_handler();
 
-    win->m_exposed = TRUE;
+    win->m_exposed = true;
 
     win->GetUpdateRegion().Union( gdk_event->area.x,
                                   gdk_event->area.y,
                                   gdk_event->area.width,
                                   gdk_event->area.height );
 }
+}
 
 //-----------------------------------------------------------------------------
 // "draw" of m_wxwindow
 //-----------------------------------------------------------------------------
 
-static void 
+extern "C" {
+static void
 gtk_glwindow_draw_callback( GtkWidget *WXUNUSED(widget), GdkRectangle *rect, wxGLCanvas *win )
 {
-    if (g_isIdle) 
+    if (g_isIdle)
         wxapp_install_idle_handler();
 
-    win->m_exposed = TRUE;
+    win->m_exposed = true;
 
     win->GetUpdateRegion().Union( rect->x, rect->y,
                                   rect->width, rect->height );
 }
+}
 
 //-----------------------------------------------------------------------------
 // "size_allocate" of m_wxwindow
 //-----------------------------------------------------------------------------
 
-static void 
+extern "C" {
+static void
 gtk_glcanvas_size_callback( GtkWidget *WXUNUSED(widget), GtkAllocation* alloc, wxGLCanvas *win )
 {
     if (g_isIdle)
@@ -232,89 +287,148 @@ gtk_glcanvas_size_callback( GtkWidget *WXUNUSED(widget), GtkAllocation* alloc, w
     event.SetEventObject( win );
     win->GetEventHandler()->ProcessEvent( event );
 }
+}
 
 //---------------------------------------------------------------------------
 // wxGlCanvas
 //---------------------------------------------------------------------------
 
-IMPLEMENT_CLASS(wxGLCanvas, wxScrolledWindow)
+IMPLEMENT_CLASS(wxGLCanvas, wxWindow)
 
-BEGIN_EVENT_TABLE(wxGLCanvas, wxScrolledWindow)
+BEGIN_EVENT_TABLE(wxGLCanvas, wxWindow)
     EVT_SIZE(wxGLCanvas::OnSize)
 END_EVENT_TABLE()
 
 wxGLCanvas::wxGLCanvas( wxWindow *parent, wxWindowID id,
-                        const wxPoint& pos, const wxSize& size, 
-			long style, const wxString& name,
-                        int *attribList, 
-			const wxPalette& palette )
+                        const wxPoint& pos, const wxSize& size,
+                        long style, const wxString& name,
+                        int *attribList,
+                        const wxPalette& palette )
 {
     Create( parent, NULL, NULL, id, pos, size, style, name, attribList, palette );
 }
 
-wxGLCanvas::wxGLCanvas( wxWindow *parent, 
+wxGLCanvas::wxGLCanvas( wxWindow *parent,
                         const wxGLContext *shared,
                         wxWindowID id,
-                        const wxPoint& pos, const wxSize& size, 
-			long style, const wxString& name,
-                        int *attribList, 
-			const wxPalette& palette )
-{			
+                        const wxPoint& pos, const wxSize& size,
+                        long style, const wxString& name,
+                        int *attribList,
+                        const wxPalette& palette )
+{
     Create( parent, shared, NULL, id, pos, size, style, name, attribList, palette );
 }
 
-wxGLCanvas::wxGLCanvas( wxWindow *parent, 
+wxGLCanvas::wxGLCanvas( wxWindow *parent,
                         const wxGLCanvas *shared,
                         wxWindowID id,
-                        const wxPoint& pos, const wxSize& size, 
-			long style, const wxString& name,
-                        int *attribList, 
-			const wxPalette& palette )
-{			
+                        const wxPoint& pos, const wxSize& size,
+                        long style, const wxString& name,
+                        int *attribList,
+                        const wxPalette& palette )
+{
     Create( parent, NULL, shared, id, pos, size, style, name, attribList, palette );
 }
 
-bool wxGLCanvas::Create( wxWindow *parent, 
+bool wxGLCanvas::Create( wxWindow *parent,
                          const wxGLContext *shared,
                          const wxGLCanvas *shared_context_of,
                          wxWindowID id,
-                         const wxPoint& pos, const wxSize& size, 
-			 long style, const wxString& name,
-                         int *attribList, 
-			 const wxPalette& palette)
+                         const wxPoint& pos, const wxSize& size,
+                         long style, const wxString& name,
+                         int *attribList,
+                         const wxPalette& palette)
 {
     m_sharedContext = (wxGLContext*)shared;  // const_cast
     m_sharedContextOf = (wxGLCanvas*)shared_context_of;  // const_cast
     m_glContext = (wxGLContext*) NULL;
-    
-    m_exposed = FALSE;
-    m_noExpose = TRUE;
-    m_nativeSizeEvent = TRUE;
-    
+
+    m_exposed = false;
+    m_noExpose = true;
+    m_nativeSizeEvent = true;
+    m_fbc = NULL;
+    m_vi = NULL;
+
+    // to be sure the glx version is known
+    wxGLCanvas::QueryGLXVersion();
+
+    if (wxGLCanvas::GetGLXVersion() >= 13)
+    {
+        // GLX >= 1.3 uses a GLXFBConfig
+        GLXFBConfig * fbc = NULL;
+        if (wxTheApp->m_glFBCInfo != NULL)
+        {
+            fbc = (GLXFBConfig *) wxTheApp->m_glFBCInfo;
+            m_canFreeFBC = false; // owned by wxTheApp - don't free upon destruction
+        }
+        else
+        {
+            fbc = (GLXFBConfig *) wxGLCanvas::ChooseGLFBC(attribList);
+            m_canFreeFBC = true;
+        }
+        m_fbc = fbc;  // save for later use
+        wxCHECK_MSG( m_fbc, false, _T("required FBConfig couldn't be found") );
+    }
+
     XVisualInfo *vi = NULL;
-    if (wxTheApp->m_glVisualInfo != NULL) {
-        vi = (XVisualInfo *) wxTheApp->m_glVisualInfo; 
-        m_canFreeVi = FALSE; // owned by wxTheApp - don't free upon destruction
-    } else {
-        vi = (XVisualInfo *) ChooseGLVisual(attribList);
-        m_canFreeVi = TRUE;
+    if (wxTheApp->m_glVisualInfo != NULL)
+    {
+        vi = (XVisualInfo *)wxTheApp->m_glVisualInfo;
+        m_canFreeVi = false; // owned by wxTheApp - don't free upon destruction
+    }
+    else
+    {
+        if (wxGLCanvas::GetGLXVersion() >= 13)
+        // GLX >= 1.3
+            vi = glXGetVisualFromFBConfig(GDK_DISPLAY(), m_fbc[0]);
+        else
+            // GLX <= 1.2
+            vi = (XVisualInfo *) ChooseGLVisual(attribList);
+
+        m_canFreeVi = true;
     }
+
     m_vi = vi;  // save for later use
-    
-    wxCHECK_MSG( m_vi, FALSE, "required visual couldn't be found" );
 
-    GdkVisual *visual = gdkx_visual_get( vi->visualid );
-    GdkColormap *colormap = gdk_colormap_new( gdkx_visual_get(vi->visualid), TRUE );
-    
-    gtk_widget_push_colormap( colormap );
-    gtk_widget_push_visual( visual );
+    wxCHECK_MSG( m_vi, false, _T("required visual couldn't be found") );
+    GdkVisual *visual;
+    GdkColormap *colormap;
 
-    wxScrolledWindow::Create( parent, id, pos, size, style, name );
+    // MR: This needs a fix for lower gtk+ versions too. Might need to rethink logic (FIXME)
+#if 0
+    if (!gtk_check_version(2,2,0))
+    {
+        wxWindow::Create( parent, id, pos, size, style, name );
+
+        m_glWidget = m_wxwindow;
+
+        GdkScreen *screen = gtk_widget_get_screen( m_glWidget );
+        colormap = gdk_screen_get_default_colormap(screen);
+        visual = gdk_colormap_get_visual(colormap);
+
+        if (GDK_VISUAL_XVISUAL(visual)->visualid != vi->visualid)
+        {
+            visual = gdk_x11_screen_lookup_visual( screen, vi->visualid );
+            colormap = gdk_colormap_new(visual, FALSE);
+        }
+
+        gtk_widget_set_colormap( m_glWidget, colormap );
+    }
+    else
+#endif
+    {
+        visual = gdkx_visual_get( vi->visualid );
+        colormap = gdk_colormap_new( visual, TRUE );
+
+        gtk_widget_push_colormap( colormap );
+        gtk_widget_push_visual( visual );
+
+        wxWindow::Create( parent, id, pos, size, style, name );
+        m_glWidget = m_wxwindow;
+    }
 
-    m_glWidget = m_wxwindow;
-    
     gtk_pizza_set_clear( GTK_PIZZA(m_wxwindow), FALSE );
-    
+
     gtk_signal_connect( GTK_OBJECT(m_wxwindow), "realize",
                             GTK_SIGNAL_FUNC(gtk_glwindow_realized_callback), (gpointer) this );
 
@@ -326,129 +440,210 @@ bool wxGLCanvas::Create( wxWindow *parent,
 
     gtk_signal_connect( GTK_OBJECT(m_wxwindow), "draw",
         GTK_SIGNAL_FUNC(gtk_glwindow_draw_callback), (gpointer)this );
-	
+
     gtk_signal_connect( GTK_OBJECT(m_widget), "size_allocate",
         GTK_SIGNAL_FUNC(gtk_glcanvas_size_callback), (gpointer)this );
 
     gtk_widget_pop_visual();
     gtk_widget_pop_colormap();
-    
+
+    // if our parent window is already visible, we had been realized before we
+    // connected to the "realize" signal and hence our m_glContext hasn't been
+    // initialized yet and we have to do it now
     if (GTK_WIDGET_REALIZED(m_wxwindow))
         gtk_glwindow_realized_callback( m_wxwindow, this );
-    
+
     if (GTK_WIDGET_MAPPED(m_wxwindow))
         gtk_glwindow_map_callback( m_wxwindow, this );
-    
-    return TRUE;
+
+    return true;
 }
 
 wxGLCanvas::~wxGLCanvas()
 {
+    GLXFBConfig * fbc = (GLXFBConfig *) m_fbc;
+    if (fbc && m_canFreeFBC)
+        XFree( fbc );
+
     XVisualInfo *vi = (XVisualInfo *) m_vi;
-    
-    if (vi && m_canFreeVi) XFree( vi );
-    if (m_glContext) delete m_glContext;
+    if (vi && m_canFreeVi)
+        XFree( vi );
+
+    delete m_glContext;
 }
 
 void* wxGLCanvas::ChooseGLVisual(int *attribList)
 {
     int data[512];
-    if (!attribList)
+    GetGLAttribListFromWX( attribList, data );
+    attribList = (int*) data;
+
+    Display *dpy = GDK_DISPLAY();
+
+    return glXChooseVisual( dpy, DefaultScreen(dpy), attribList );
+}
+
+void* wxGLCanvas::ChooseGLFBC(int *attribList)
+{
+    int data[512];
+    GetGLAttribListFromWX( attribList, data );
+    attribList = (int*) data;
+
+    int returned;
+    return glXChooseFBConfig( GDK_DISPLAY(), DefaultScreen(GDK_DISPLAY()),
+                              attribList, &returned );
+}
+
+
+void wxGLCanvas::GetGLAttribListFromWX(int *wx_attribList, int *gl_attribList )
+{
+    if (!wx_attribList)
     {
-        // default settings if attriblist = 0
-        data[0] = GLX_RGBA;
-        data[1] = GLX_DOUBLEBUFFER;
-        data[2] = GLX_DEPTH_SIZE;   data[3] = 1;
-        data[4] = GLX_RED_SIZE;     data[5] = 1;
-        data[6] = GLX_GREEN_SIZE;   data[7] = 1;
-        data[8] = GLX_BLUE_SIZE;    data[9] = 1;
-        data[10] = GLX_ALPHA_SIZE;  data[11] = 0;
-        data[12] = None;
-
-	attribList = (int*) data;
+        if (wxGLCanvas::GetGLXVersion() >= 13)
+        // leave GLX >= 1.3 choose the default attributes
+            gl_attribList[0] = 0;
+        else
+        {
+            int i = 0;
+            // default settings if attriblist = 0
+            gl_attribList[i++] = GLX_RGBA;
+            gl_attribList[i++] = GLX_DOUBLEBUFFER;
+            gl_attribList[i++] = GLX_DEPTH_SIZE;   gl_attribList[i++] = 1;
+            gl_attribList[i++] = GLX_RED_SIZE;     gl_attribList[i++] = 1;
+            gl_attribList[i++] = GLX_GREEN_SIZE;   gl_attribList[i++] = 1;
+            gl_attribList[i++] = GLX_BLUE_SIZE;    gl_attribList[i++] = 1;
+            gl_attribList[i++] = GLX_ALPHA_SIZE;   gl_attribList[i++] = 0;
+            gl_attribList[i++] = None;
+        }
     }
     else
     {
-      int arg=0, p=0;
-       
-      while( (attribList[arg]!=0) && (p<510) )
-      {
-        switch( attribList[arg++] )
+        int arg=0, p=0;
+        while( (wx_attribList[arg]!=0) && (p<510) )
         {
-          case WX_GL_RGBA: data[p++] = GLX_RGBA; break;
-          case WX_GL_BUFFER_SIZE:
-            data[p++]=GLX_BUFFER_SIZE; data[p++]=attribList[arg++]; break;
-          case WX_GL_LEVEL:
-            data[p++]=GLX_LEVEL; data[p++]=attribList[arg++]; break;
-          case WX_GL_DOUBLEBUFFER: data[p++] = GLX_DOUBLEBUFFER; break;
-          case WX_GL_STEREO: data[p++] = GLX_STEREO; break;
-          case WX_GL_AUX_BUFFERS:
-            data[p++]=GLX_AUX_BUFFERS; data[p++]=attribList[arg++]; break;
-          case WX_GL_MIN_RED:
-            data[p++]=GLX_RED_SIZE; data[p++]=attribList[arg++]; break;
-          case WX_GL_MIN_GREEN:
-            data[p++]=GLX_GREEN_SIZE; data[p++]=attribList[arg++]; break;
-          case WX_GL_MIN_BLUE:
-            data[p++]=GLX_BLUE_SIZE; data[p++]=attribList[arg++]; break;
-          case WX_GL_MIN_ALPHA:
-            data[p++]=GLX_ALPHA_SIZE; data[p++]=attribList[arg++]; break;
-          case WX_GL_DEPTH_SIZE: 
-            data[p++]=GLX_DEPTH_SIZE; data[p++]=attribList[arg++]; break;
-          case WX_GL_STENCIL_SIZE: 
-            data[p++]=GLX_STENCIL_SIZE; data[p++]=attribList[arg++]; break;
-          case WX_GL_MIN_ACCUM_RED:
-            data[p++]=GLX_ACCUM_RED_SIZE; data[p++]=attribList[arg++]; break;
-          case WX_GL_MIN_ACCUM_GREEN:
-            data[p++]=GLX_ACCUM_GREEN_SIZE; data[p++]=attribList[arg++]; break;
-          case WX_GL_MIN_ACCUM_BLUE:
-            data[p++]=GLX_ACCUM_BLUE_SIZE; data[p++]=attribList[arg++]; break;
-          case WX_GL_MIN_ACCUM_ALPHA:
-            data[p++]=GLX_ACCUM_ALPHA_SIZE; data[p++]=attribList[arg++]; break;
-          default:
-            break;
+            switch( wx_attribList[arg++] )
+            {
+                case WX_GL_RGBA:
+                    if (wxGLCanvas::GetGLXVersion() <= 12)
+                        // for GLX >= 1.3, GLX_RGBA is useless (setting this flags will crash on most opengl implm)
+                        gl_attribList[p++] = GLX_RGBA;
+                    break;
+                case WX_GL_BUFFER_SIZE:
+                    gl_attribList[p++] = GLX_BUFFER_SIZE;
+                    gl_attribList[p++] = wx_attribList[arg++];
+                    break;
+                case WX_GL_LEVEL:
+                    gl_attribList[p++] = GLX_LEVEL;
+                    gl_attribList[p++] = wx_attribList[arg++];
+                    break;
+                case WX_GL_DOUBLEBUFFER:
+                    if (wxGLCanvas::GetGLXVersion() <= 12)
+                        gl_attribList[p++] = GLX_DOUBLEBUFFER;
+                    else
+                        // for GLX >= 1.3, GLX_DOUBLEBUFFER format is different (1 <=> True)
+                        // it seems this flag is useless for some hardware opengl implementation.
+                        // but for Mesa 6.2.1, this flag is used so don't ignore it.
+                        gl_attribList[p++] = GLX_DOUBLEBUFFER;
+                    gl_attribList[p++] = 1;
+                    break;
+                case WX_GL_STEREO:
+                    gl_attribList[p++] = GLX_STEREO;
+                    break;
+                case WX_GL_AUX_BUFFERS:
+                    gl_attribList[p++] = GLX_AUX_BUFFERS;
+                    gl_attribList[p++] = wx_attribList[arg++];
+                    break;
+                case WX_GL_MIN_RED:
+                    gl_attribList[p++] = GLX_RED_SIZE;
+                    gl_attribList[p++] = wx_attribList[arg++];
+                    break;
+                case WX_GL_MIN_GREEN:
+                    gl_attribList[p++] = GLX_GREEN_SIZE;
+                    gl_attribList[p++] = wx_attribList[arg++];
+                    break;
+                case WX_GL_MIN_BLUE:
+                    gl_attribList[p++] = GLX_BLUE_SIZE;
+                    gl_attribList[p++] = wx_attribList[arg++];
+                    break;
+                case WX_GL_MIN_ALPHA:
+                    gl_attribList[p++] = GLX_ALPHA_SIZE;
+                    gl_attribList[p++] = wx_attribList[arg++];
+                    break;
+                case WX_GL_DEPTH_SIZE:
+                    gl_attribList[p++] = GLX_DEPTH_SIZE;
+                    gl_attribList[p++] = wx_attribList[arg++];
+                    break;
+                case WX_GL_STENCIL_SIZE:
+                    gl_attribList[p++] = GLX_STENCIL_SIZE;
+                    gl_attribList[p++] = wx_attribList[arg++];
+                    break;
+                case WX_GL_MIN_ACCUM_RED:
+                    gl_attribList[p++] = GLX_ACCUM_RED_SIZE;
+                    gl_attribList[p++] = wx_attribList[arg++];
+                    break;
+                case WX_GL_MIN_ACCUM_GREEN:
+                    gl_attribList[p++] = GLX_ACCUM_GREEN_SIZE;
+                    gl_attribList[p++] = wx_attribList[arg++];
+                    break;
+                case WX_GL_MIN_ACCUM_BLUE:
+                    gl_attribList[p++] = GLX_ACCUM_BLUE_SIZE;
+                    gl_attribList[p++] = wx_attribList[arg++];
+                    break;
+                case WX_GL_MIN_ACCUM_ALPHA:
+                    gl_attribList[p++] = GLX_ACCUM_ALPHA_SIZE;
+                    gl_attribList[p++] = wx_attribList[arg++];
+                    break;
+                default:
+                    break;
+            }
         }
-      }       
-      data[p] = 0; 
 
-      attribList = (int*) data;
+        gl_attribList[p] = 0;
     }
-    
-    
-    Display *dpy = GDK_DISPLAY();
-    
-    return glXChooseVisual( dpy, DefaultScreen(dpy), attribList );
 }
 
+void wxGLCanvas::QueryGLXVersion()
+{
+    if (m_glxVersion == 0)
+    {
+        // check the GLX version
+        int glxMajorVer, glxMinorVer;
+        bool ok = glXQueryVersion(GDK_DISPLAY(), &glxMajorVer, &glxMinorVer);
+        wxASSERT_MSG( ok, _T("GLX version not found") );
+        if (!ok)
+            m_glxVersion = 10; // 1.0 by default
+        else
+            m_glxVersion = glxMajorVer*10 + glxMinorVer;
+    }
+}
+
+int wxGLCanvas::GetGLXVersion()
+{
+    wxASSERT_MSG( m_glxVersion>0, _T("GLX version has not been initialized with wxGLCanvas::QueryGLXVersion()") );
+    return m_glxVersion;
+}
+
+
 void wxGLCanvas::SwapBuffers()
 {
-    if (m_glContext) m_glContext->SwapBuffers();
+    if (m_glContext)
+        m_glContext->SwapBuffers();
 }
 
 void wxGLCanvas::OnSize(wxSizeEvent& WXUNUSED(event))
 {
-    int width, height;
-    GetClientSize( &width, &height );
-    
-    if (m_glContext && GTK_WIDGET_REALIZED(m_glWidget) )
-    {
-        SetCurrent(); 
-	
-        glViewport(0, 0, (GLint)width, (GLint)height );
-        glMatrixMode(GL_PROJECTION);
-        glLoadIdentity();
-        glFrustum( -1.0, 1.0, -1.0, 1.0, 5.0, 15.0 );
-        glMatrixMode(GL_MODELVIEW);
-    }
 }
 
 void wxGLCanvas::SetCurrent()
 {
-    if (m_glContext) m_glContext->SetCurrent();
+    if (m_glContext)
+        m_glContext->SetCurrent();
 }
 
-void wxGLCanvas::SetColour( const char *colour )
+void wxGLCanvas::SetColour( const wxChar *colour )
 {
-    if (m_glContext) m_glContext->SetColour( colour );
+    if (m_glContext)
+        m_glContext->SetColour( colour );
 }
 
 void wxGLCanvas::OnInternalIdle()
@@ -459,10 +654,10 @@ void wxGLCanvas::OnInternalIdle()
         event.SetEventObject( this );
         GetEventHandler()->ProcessEvent( event );
 
-        m_exposed = FALSE;
+        m_exposed = false;
         GetUpdateRegion().Clear();
     }
-    
+
     wxWindow::OnInternalIdle();
 }
 
@@ -473,19 +668,43 @@ void wxGLCanvas::OnInternalIdle()
 //---------------------------------------------------------------------------
 
 IMPLEMENT_CLASS(wxGLApp, wxApp)
-        
+
 wxGLApp::~wxGLApp()
 {
-    if (m_glVisualInfo) XFree(m_glVisualInfo);
+    if (m_glFBCInfo)
+        XFree(m_glFBCInfo);
+    if (m_glVisualInfo)
+        XFree(m_glVisualInfo);
 }
 
 bool wxGLApp::InitGLVisual(int *attribList)
 {
-    if (m_glVisualInfo) XFree(m_glVisualInfo);
-    m_glVisualInfo = wxGLCanvas::ChooseGLVisual(attribList);
-    return (m_glVisualInfo != NULL);
+    wxGLCanvas::QueryGLXVersion();
+
+    if (wxGLCanvas::GetGLXVersion() >= 13)
+    {
+        // GLX >= 1.3
+        if (m_glFBCInfo)
+            XFree(m_glFBCInfo);
+        m_glFBCInfo = wxGLCanvas::ChooseGLFBC(attribList);
+
+        if (m_glFBCInfo)
+        {
+            if (m_glVisualInfo)
+                XFree(m_glVisualInfo);
+            m_glVisualInfo = glXGetVisualFromFBConfig(GDK_DISPLAY(), ((GLXFBConfig *)m_glFBCInfo)[0]);
+        }
+        return (m_glFBCInfo != NULL) && (m_glVisualInfo != NULL);
+    }
+    else
+    {
+        // GLX <= 1.2
+        if (m_glVisualInfo)
+            XFree(m_glVisualInfo);
+        m_glVisualInfo = wxGLCanvas::ChooseGLVisual(attribList);
+        return m_glVisualInfo != NULL;
+    }
 }
 
 #endif
     // wxUSE_GLCANVAS
-