src/gtk/glcanvas.cpp

/////////////////////////////////////////////////////////////////////////////
// Name:        gtk/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
/////////////////////////////////////////////////////////////////////////////

#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
#pragma implementation "glcanvas.h"
#endif

// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"

#include "wx/setup.h"

#if wxUSE_GLCANVAS

#include "wx/glcanvas.h"

#include "wx/frame.h"
#include "wx/colour.h"
#include "wx/module.h"
#include "wx/app.h"

extern "C"
{
#include "gtk/gtk.h"
#include "gdk/gdk.h"
#include "gdk/gdkx.h"
}

#include "wx/gtk/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
//-----------------------------------------------------------------------------

extern void wxapp_install_idle_handler();
extern bool g_isIdle;

//---------------------------------------------------------------------------
// wxGLContext
//---------------------------------------------------------------------------

IMPLEMENT_CLASS(wxGLContext,wxObject)

wxGLContext::wxGLContext( bool WXUNUSED(isRGB), wxWindow *win, const wxPalette& WXUNUSED(palette) )
{
    m_window = win;
    m_widget = win->m_wxwindow;

    wxGLCanvas *gc = (wxGLCanvas*) win;

    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,
               const wxPalette& WXUNUSED(palette),
               const wxGLContext *other        /* for sharing display lists */
)
{
    m_window = win;
    m_widget = win->m_wxwindow;

    wxGLCanvas *gc = (wxGLCanvas*) win;

    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
    {
        // 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())
    {
        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 );
}

void wxGLContext::SwapBuffers()
{
    if (m_glContext)
    {
        GdkWindow *window = GTK_PIZZA(m_widget)->bin_window;
        glXSwapBuffers( GDK_DISPLAY(), GDK_WINDOW_XWINDOW( window ) );
    }
}

void wxGLContext::SetCurrent()
{
    if (m_glContext)
    {
        GdkWindow *window = GTK_PIZZA(m_widget)->bin_window;

        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 wxChar *colour)
{
    wxColour col = wxTheColourDatabase->Find(colour);
    if (col.Ok())
    {
        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);
    }
}

void wxGLContext::SetupPixelFormat()
{
}

void wxGLContext::SetupPalette( const wxPalette& WXUNUSED(palette) )
{
}

wxPalette wxGLContext::CreateDefaultPalette()
{
    return wxNullPalette;
}

//-----------------------------------------------------------------------------
// "realize" from m_wxwindow
//-----------------------------------------------------------------------------

extern "C" {
static gint
gtk_glwindow_realized_callback( GtkWidget *WXUNUSED(widget), wxGLCanvas *win )
{
    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 );
    }

    return FALSE;
}
}

//-----------------------------------------------------------------------------
// "map" from m_wxwindow
//-----------------------------------------------------------------------------

extern "C" {
static gint
gtk_glwindow_map_callback( GtkWidget * WXUNUSED(widget), wxGLCanvas *win )
{
    if (win->m_glContext/* && win->m_exposed*/)
    {
        wxPaintEvent event( win->GetId() );
        event.SetEventObject( win );
        win->GetEventHandler()->ProcessEvent( event );

        win->m_exposed = FALSE;
        win->GetUpdateRegion().Clear();
    }

    return FALSE;
}
}

//-----------------------------------------------------------------------------
// "expose_event" of m_wxwindow
//-----------------------------------------------------------------------------

extern "C" {
static void
gtk_glwindow_expose_callback( GtkWidget *WXUNUSED(widget), GdkEventExpose *gdk_event, wxGLCanvas *win )
{
    if (g_isIdle)
        wxapp_install_idle_handler();

    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
//-----------------------------------------------------------------------------

#ifndef __WXGTK20__
extern "C" {
static void
gtk_glwindow_draw_callback( GtkWidget *WXUNUSED(widget), GdkRectangle *rect, wxGLCanvas *win )
{
    if (g_isIdle)
        wxapp_install_idle_handler();

    win->m_exposed = TRUE;

    win->GetUpdateRegion().Union( rect->x, rect->y,
                                  rect->width, rect->height );
}
}
#endif

//-----------------------------------------------------------------------------
// "size_allocate" of m_wxwindow
//-----------------------------------------------------------------------------

extern "C" {
static void
gtk_glcanvas_size_callback( GtkWidget *WXUNUSED(widget), GtkAllocation* alloc, wxGLCanvas *win )
{
    if (g_isIdle)
        wxapp_install_idle_handler();

    if (!win->m_hasVMT)
        return;

    wxSizeEvent event( wxSize(win->m_width,win->m_height), win->GetId() );
    event.SetEventObject( win );
    win->GetEventHandler()->ProcessEvent( event );
}
}

//---------------------------------------------------------------------------
// wxGlCanvas
//---------------------------------------------------------------------------

IMPLEMENT_CLASS(wxGLCanvas, wxWindow)

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 )
{
    Create( parent, NULL, NULL, id, pos, size, style, name, attribList, palette );
}

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 )
{
    Create( parent, shared, NULL, id, pos, size, style, name, attribList, palette );
}

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 )
{
    Create( parent, NULL, shared, id, pos, size, style, name, attribList, palette );
}

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)
{
    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_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
    {
        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, _T("required visual couldn't be found") );
    GdkVisual *visual;
    GdkColormap *colormap;

    // MR: This needs a fix for lower gtk+ versions too. Might need to rethink logic (FIXME)
#if defined(__WXGTK20__) && GTK_CHECK_VERSION(2,2,0)
    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;
    }

#ifdef __WXGTK20__
    gtk_widget_set_double_buffered( m_glWidget, FALSE );
#endif

    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 );

    gtk_signal_connect( GTK_OBJECT(m_wxwindow), "map",
                            GTK_SIGNAL_FUNC(gtk_glwindow_map_callback), (gpointer) this );

    gtk_signal_connect( GTK_OBJECT(m_wxwindow), "expose_event",
        GTK_SIGNAL_FUNC(gtk_glwindow_expose_callback), (gpointer)this );

#ifndef __WXGTK20__
    gtk_signal_connect( GTK_OBJECT(m_wxwindow), "draw",
        GTK_SIGNAL_FUNC(gtk_glwindow_draw_callback), (gpointer)this );
#endif

    gtk_signal_connect( GTK_OBJECT(m_widget), "size_allocate",
        GTK_SIGNAL_FUNC(gtk_glcanvas_size_callback), (gpointer)this );

#ifdef __WXGTK20__
    if (gtk_check_version(2,2,0) != NULL)
#endif
    {
        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;
}

wxGLCanvas::~wxGLCanvas()
{
    GLXFBConfig * fbc = (GLXFBConfig *) m_fbc;
    if (fbc && m_canFreeFBC)
        XFree( fbc );

    XVisualInfo *vi = (XVisualInfo *) m_vi;
    if (vi && m_canFreeVi)
        XFree( vi );

    delete m_glContext;
}

void* wxGLCanvas::ChooseGLVisual(int *attribList)
{
    int data[512];
    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)
    {
        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( (wx_attribList[arg]!=0) && (p<510) )
        {
            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;
            }
        }

        gl_attribList[p] = 0;
    }
}

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();
}

void wxGLCanvas::OnSize(wxSizeEvent& WXUNUSED(event))
{
}

void wxGLCanvas::SetCurrent()
{
    if (m_glContext)
        m_glContext->SetCurrent();
}

void wxGLCanvas::SetColour( const wxChar *colour )
{
    if (m_glContext)
        m_glContext->SetColour( colour );
}

void wxGLCanvas::OnInternalIdle()
{
    if (m_glContext && m_exposed)
    {
        wxPaintEvent event( GetId() );
        event.SetEventObject( this );
        GetEventHandler()->ProcessEvent( event );

        m_exposed = FALSE;
        GetUpdateRegion().Clear();
    }

    wxWindow::OnInternalIdle();
}


//---------------------------------------------------------------------------
// wxGLApp
//---------------------------------------------------------------------------

IMPLEMENT_CLASS(wxGLApp, wxApp)

wxGLApp::~wxGLApp()
{
    if (m_glFBCInfo)
        XFree(m_glFBCInfo);
    if (m_glVisualInfo)
        XFree(m_glVisualInfo);
}

bool wxGLApp::InitGLVisual(int *attribList)
{
    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
Commit	Line	Data
	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	#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
	13	#pragma implementation "glcanvas.h"
	14	#endif
	15
	16	// For compilers that support precompilation, includes "wx.h".
	17	#include "wx/wxprec.h"
	18
	19	#include "wx/setup.h"
	20
	21	#if wxUSE_GLCANVAS
	22
	23	#include "wx/glcanvas.h"
	24
	25	#include "wx/frame.h"
	26	#include "wx/colour.h"
	27	#include "wx/module.h"
	28	#include "wx/app.h"
	29
	30	extern "C"
	31	{
	32	#include "gtk/gtk.h"
	33	#include "gdk/gdk.h"
	34	#include "gdk/gdkx.h"
	35	}
	36
	37	#include "wx/gtk/win_gtk.h"
	38
	39	// DLL options compatibility check:
	40	#include "wx/build.h"
	41	WX_CHECK_BUILD_OPTIONS("wxGL")
	42
	43
	44	//---------------------------------------------------------------------------
	45	// static variables
	46	//---------------------------------------------------------------------------
	47	int wxGLCanvas::m_glxVersion = 0;
	48
	49	//---------------------------------------------------------------------------
	50	// global data
	51	//---------------------------------------------------------------------------
	52
	53	XVisualInfo g_vi = (XVisualInfo) NULL;
	54	//-----------------------------------------------------------------------------
	55	// idle system
	56	//-----------------------------------------------------------------------------
	57
	58	extern void wxapp_install_idle_handler();
	59	extern bool g_isIdle;
	60
	61	//---------------------------------------------------------------------------
	62	// wxGLContext
	63	//---------------------------------------------------------------------------
	64
	65	IMPLEMENT_CLASS(wxGLContext,wxObject)
	66
	67	wxGLContext::wxGLContext( bool WXUNUSED(isRGB), wxWindow *win, const wxPalette& WXUNUSED(palette) )
	68	{
	69	m_window = win;
	70	m_widget = win->m_wxwindow;
	71
	72	wxGLCanvas gc = (wxGLCanvas) win;
	73
	74	if (wxGLCanvas::GetGLXVersion() >= 13)
	75	{
	76	// GLX >= 1.3
	77	GLXFBConfig *fbc = gc->m_fbc;
	78	wxCHECK_RET( fbc, _T("invalid GLXFBConfig for OpenGl") );
	79	m_glContext = glXCreateNewContext( GDK_DISPLAY(), fbc[0], GLX_RGBA_TYPE, None, GL_TRUE );
	80	}
	81	else
	82	{
	83	// GLX <= 1.2
	84	XVisualInfo vi = (XVisualInfo ) gc->m_vi;
	85	wxCHECK_RET( vi, _T("invalid visual for OpenGl") );
	86	m_glContext = glXCreateContext( GDK_DISPLAY(), vi, None, GL_TRUE );
	87	}
	88
	89	wxCHECK_RET( m_glContext, _T("Couldn't create OpenGl context") );
	90	}
	91
	92	wxGLContext::wxGLContext(
	93	bool WXUNUSED(isRGB), wxWindow *win,
	94	const wxPalette& WXUNUSED(palette),
	95	const wxGLContext other / for sharing display lists */
	96	)
	97	{
	98	m_window = win;
	99	m_widget = win->m_wxwindow;
	100
	101	wxGLCanvas gc = (wxGLCanvas) win;
	102
	103	if (wxGLCanvas::GetGLXVersion() >= 13)
	104	{
	105	// GLX >= 1.3
	106	GLXFBConfig *fbc = gc->m_fbc;
	107	wxCHECK_RET( fbc, _T("invalid GLXFBConfig for OpenGl") );
	108	m_glContext = glXCreateNewContext( GDK_DISPLAY(), fbc[0], GLX_RGBA_TYPE,
	109	other ? other->m_glContext : None,
	110	GL_TRUE );
	111	}
	112	else
	113	{
	114	// GLX <= 1.2
	115	XVisualInfo vi = (XVisualInfo ) gc->m_vi;
	116	wxCHECK_RET( vi, _T("invalid visual for OpenGl") );
	117	m_glContext = glXCreateContext( GDK_DISPLAY(), vi,
	118	other ? other->m_glContext : None,
	119	GL_TRUE );
	120	}
	121
	122	if ( !m_glContext )
	123	{
	124	wxFAIL_MSG( _T("Couldn't create OpenGl context") );
	125	}
	126	}
	127
	128	wxGLContext::~wxGLContext()
	129	{
	130	if (!m_glContext) return;
	131
	132	if (m_glContext == glXGetCurrentContext())
	133	{
	134	if (wxGLCanvas::GetGLXVersion() >= 13)
	135	// GLX >= 1.3
	136	glXMakeContextCurrent( GDK_DISPLAY(), None, None, NULL);
	137	else
	138	// GLX <= 1.2
	139	glXMakeCurrent( GDK_DISPLAY(), None, NULL);
	140	}
	141
	142	glXDestroyContext( GDK_DISPLAY(), m_glContext );
	143	}
	144
	145	void wxGLContext::SwapBuffers()
	146	{
	147	if (m_glContext)
	148	{
	149	GdkWindow *window = GTK_PIZZA(m_widget)->bin_window;
	150	glXSwapBuffers( GDK_DISPLAY(), GDK_WINDOW_XWINDOW( window ) );
	151	}
	152	}
	153
	154	void wxGLContext::SetCurrent()
	155	{
	156	if (m_glContext)
	157	{
	158	GdkWindow *window = GTK_PIZZA(m_widget)->bin_window;
	159
	160	if (wxGLCanvas::GetGLXVersion() >= 13)
	161	// GLX >= 1.3
	162	glXMakeContextCurrent( GDK_DISPLAY(), GDK_WINDOW_XWINDOW(window),
	163	GDK_WINDOW_XWINDOW(window), m_glContext );
	164	else
	165	// GLX <= 1.2
	166	glXMakeCurrent( GDK_DISPLAY(), GDK_WINDOW_XWINDOW(window), m_glContext );
	167	}
	168	}
	169
	170	void wxGLContext::SetColour(const wxChar *colour)
	171	{
	172	wxColour col = wxTheColourDatabase->Find(colour);
	173	if (col.Ok())
	174	{
	175	float r = (float)(col.Red()/256.0);
	176	float g = (float)(col.Green()/256.0);
	177	float b = (float)(col.Blue()/256.0);
	178	glColor3f( r, g, b);
	179	}
	180	}
	181
	182	void wxGLContext::SetupPixelFormat()
	183	{
	184	}
	185
	186	void wxGLContext::SetupPalette( const wxPalette& WXUNUSED(palette) )
	187	{
	188	}
	189
	190	wxPalette wxGLContext::CreateDefaultPalette()
	191	{
	192	return wxNullPalette;
	193	}
	194
	195	//-----------------------------------------------------------------------------
	196	// "realize" from m_wxwindow
	197	//-----------------------------------------------------------------------------
	198
	199	extern "C" {
	200	static gint
	201	gtk_glwindow_realized_callback( GtkWidget WXUNUSED(widget), wxGLCanvas win )
	202	{
	203	if ( !win->m_glContext )
	204	{
	205	wxGLContext *share = win->m_sharedContext;
	206	if ( !share && win->m_sharedContextOf )
	207	share = win->m_sharedContextOf->GetContext();
	208
	209	win->m_glContext = new wxGLContext( TRUE, win, wxNullPalette, share );
	210	}
	211
	212	return FALSE;
	213	}
	214	}
	215
	216	//-----------------------------------------------------------------------------
	217	// "map" from m_wxwindow
	218	//-----------------------------------------------------------------------------
	219
	220	extern "C" {
	221	static gint
	222	gtk_glwindow_map_callback( GtkWidget * WXUNUSED(widget), wxGLCanvas *win )
	223	{
	224	if (win->m_glContext/* && win->m_exposed*/)
	225	{
	226	wxPaintEvent event( win->GetId() );
	227	event.SetEventObject( win );
	228	win->GetEventHandler()->ProcessEvent( event );
	229
	230	win->m_exposed = FALSE;
	231	win->GetUpdateRegion().Clear();
	232	}
	233
	234	return FALSE;
	235	}
	236	}
	237
	238	//-----------------------------------------------------------------------------
	239	// "expose_event" of m_wxwindow
	240	//-----------------------------------------------------------------------------
	241
	242	extern "C" {
	243	static void
	244	gtk_glwindow_expose_callback( GtkWidget WXUNUSED(widget), GdkEventExpose gdk_event, wxGLCanvas *win )
	245	{
	246	if (g_isIdle)
	247	wxapp_install_idle_handler();
	248
	249	win->m_exposed = TRUE;
	250
	251	win->GetUpdateRegion().Union( gdk_event->area.x,
	252	gdk_event->area.y,
	253	gdk_event->area.width,
	254	gdk_event->area.height );
	255	}
	256	}
	257
	258	//-----------------------------------------------------------------------------
	259	// "draw" of m_wxwindow
	260	//-----------------------------------------------------------------------------
	261
	262	#ifndef __WXGTK20__
	263	extern "C" {
	264	static void
	265	gtk_glwindow_draw_callback( GtkWidget WXUNUSED(widget), GdkRectangle rect, wxGLCanvas *win )
	266	{
	267	if (g_isIdle)
	268	wxapp_install_idle_handler();
	269
	270	win->m_exposed = TRUE;
	271
	272	win->GetUpdateRegion().Union( rect->x, rect->y,
	273	rect->width, rect->height );
	274	}
	275	}
	276	#endif
	277
	278	//-----------------------------------------------------------------------------
	279	// "size_allocate" of m_wxwindow
	280	//-----------------------------------------------------------------------------
	281
	282	extern "C" {
	283	static void
	284	gtk_glcanvas_size_callback( GtkWidget WXUNUSED(widget), GtkAllocation alloc, wxGLCanvas *win )
	285	{
	286	if (g_isIdle)
	287	wxapp_install_idle_handler();
	288
	289	if (!win->m_hasVMT)
	290	return;
	291
	292	wxSizeEvent event( wxSize(win->m_width,win->m_height), win->GetId() );
	293	event.SetEventObject( win );
	294	win->GetEventHandler()->ProcessEvent( event );
	295	}
	296	}
	297
	298	//---------------------------------------------------------------------------
	299	// wxGlCanvas
	300	//---------------------------------------------------------------------------
	301
	302	IMPLEMENT_CLASS(wxGLCanvas, wxWindow)
	303
	304	BEGIN_EVENT_TABLE(wxGLCanvas, wxWindow)
	305	EVT_SIZE(wxGLCanvas::OnSize)
	306	END_EVENT_TABLE()
	307
	308	wxGLCanvas::wxGLCanvas( wxWindow *parent, wxWindowID id,
	309	const wxPoint& pos, const wxSize& size,
	310	long style, const wxString& name,
	311	int *attribList,
	312	const wxPalette& palette )
	313	{
	314	Create( parent, NULL, NULL, id, pos, size, style, name, attribList, palette );
	315	}
	316
	317	wxGLCanvas::wxGLCanvas( wxWindow *parent,
	318	const wxGLContext *shared,
	319	wxWindowID id,
	320	const wxPoint& pos, const wxSize& size,
	321	long style, const wxString& name,
	322	int *attribList,
	323	const wxPalette& palette )
	324	{
	325	Create( parent, shared, NULL, id, pos, size, style, name, attribList, palette );
	326	}
	327
	328	wxGLCanvas::wxGLCanvas( wxWindow *parent,
	329	const wxGLCanvas *shared,
	330	wxWindowID id,
	331	const wxPoint& pos, const wxSize& size,
	332	long style, const wxString& name,
	333	int *attribList,
	334	const wxPalette& palette )
	335	{
	336	Create( parent, NULL, shared, id, pos, size, style, name, attribList, palette );
	337	}
	338
	339	bool wxGLCanvas::Create( wxWindow *parent,
	340	const wxGLContext *shared,
	341	const wxGLCanvas *shared_context_of,
	342	wxWindowID id,
	343	const wxPoint& pos, const wxSize& size,
	344	long style, const wxString& name,
	345	int *attribList,
	346	const wxPalette& palette)
	347	{
	348	m_sharedContext = (wxGLContext*)shared; // const_cast
	349	m_sharedContextOf = (wxGLCanvas*)shared_context_of; // const_cast
	350	m_glContext = (wxGLContext*) NULL;
	351
	352	m_exposed = FALSE;
	353	m_noExpose = TRUE;
	354	m_nativeSizeEvent = TRUE;
	355	m_fbc = NULL;
	356	m_vi = NULL;
	357
	358	// to be sure the glx version is known
	359	wxGLCanvas::QueryGLXVersion();
	360
	361	if (wxGLCanvas::GetGLXVersion() >= 13)
	362	{
	363	// GLX >= 1.3 uses a GLXFBConfig
	364	GLXFBConfig * fbc = NULL;
	365	if (wxTheApp->m_glFBCInfo != NULL)
	366	{
	367	fbc = (GLXFBConfig *) wxTheApp->m_glFBCInfo;
	368	m_canFreeFBC = FALSE; // owned by wxTheApp - don't free upon destruction
	369	}
	370	else
	371	{
	372	fbc = (GLXFBConfig *) wxGLCanvas::ChooseGLFBC(attribList);
	373	m_canFreeFBC = TRUE;
	374	}
	375	m_fbc = fbc; // save for later use
	376	wxCHECK_MSG( m_fbc, FALSE, _T("required FBConfig couldn't be found") );
	377	}
	378
	379	XVisualInfo *vi = NULL;
	380	if (wxTheApp->m_glVisualInfo != NULL)
	381	{
	382	vi = (XVisualInfo *)wxTheApp->m_glVisualInfo;
	383	m_canFreeVi = FALSE; // owned by wxTheApp - don't free upon destruction
	384	}
	385	else
	386	{
	387	if (wxGLCanvas::GetGLXVersion() >= 13)
	388	// GLX >= 1.3
	389	vi = glXGetVisualFromFBConfig(GDK_DISPLAY(), m_fbc[0]);
	390	else
	391	// GLX <= 1.2
	392	vi = (XVisualInfo *) ChooseGLVisual(attribList);
	393
	394	m_canFreeVi = TRUE;
	395	}
	396
	397	m_vi = vi; // save for later use
	398
	399	wxCHECK_MSG( m_vi, FALSE, _T("required visual couldn't be found") );
	400	GdkVisual *visual;
	401	GdkColormap *colormap;
	402
	403	// MR: This needs a fix for lower gtk+ versions too. Might need to rethink logic (FIXME)
	404	#if defined(__WXGTK20__) && GTK_CHECK_VERSION(2,2,0)
	405	if (!gtk_check_version(2,2,0))
	406	{
	407	wxWindow::Create( parent, id, pos, size, style, name );
	408
	409	m_glWidget = m_wxwindow;
	410
	411	GdkScreen *screen = gtk_widget_get_screen( m_glWidget );
	412	colormap = gdk_screen_get_default_colormap(screen);
	413	visual = gdk_colormap_get_visual(colormap);
	414
	415	if (GDK_VISUAL_XVISUAL(visual)->visualid != vi->visualid)
	416	{
	417	visual = gdk_x11_screen_lookup_visual( screen, vi->visualid );
	418	colormap = gdk_colormap_new(visual, FALSE);
	419	}
	420
	421	gtk_widget_set_colormap( m_glWidget, colormap );
	422	}
	423	else
	424	#endif
	425	{
	426	visual = gdkx_visual_get( vi->visualid );
	427	colormap = gdk_colormap_new( visual, TRUE );
	428
	429	gtk_widget_push_colormap( colormap );
	430	gtk_widget_push_visual( visual );
	431
	432	wxWindow::Create( parent, id, pos, size, style, name );
	433	m_glWidget = m_wxwindow;
	434	}
	435
	436	#ifdef __WXGTK20__
	437	gtk_widget_set_double_buffered( m_glWidget, FALSE );
	438	#endif
	439
	440	gtk_pizza_set_clear( GTK_PIZZA(m_wxwindow), FALSE );
	441
	442	gtk_signal_connect( GTK_OBJECT(m_wxwindow), "realize",
	443	GTK_SIGNAL_FUNC(gtk_glwindow_realized_callback), (gpointer) this );
	444
	445	gtk_signal_connect( GTK_OBJECT(m_wxwindow), "map",
	446	GTK_SIGNAL_FUNC(gtk_glwindow_map_callback), (gpointer) this );
	447
	448	gtk_signal_connect( GTK_OBJECT(m_wxwindow), "expose_event",
	449	GTK_SIGNAL_FUNC(gtk_glwindow_expose_callback), (gpointer)this );
	450
	451	#ifndef __WXGTK20__
	452	gtk_signal_connect( GTK_OBJECT(m_wxwindow), "draw",
	453	GTK_SIGNAL_FUNC(gtk_glwindow_draw_callback), (gpointer)this );
	454	#endif
	455
	456	gtk_signal_connect( GTK_OBJECT(m_widget), "size_allocate",
	457	GTK_SIGNAL_FUNC(gtk_glcanvas_size_callback), (gpointer)this );
	458
	459	#ifdef __WXGTK20__
	460	if (gtk_check_version(2,2,0) != NULL)
	461	#endif
	462	{
	463	gtk_widget_pop_visual();
	464	gtk_widget_pop_colormap();
	465	}
	466
	467	// if our parent window is already visible, we had been realized before we
	468	// connected to the "realize" signal and hence our m_glContext hasn't been
	469	// initialized yet and we have to do it now
	470	if (GTK_WIDGET_REALIZED(m_wxwindow))
	471	gtk_glwindow_realized_callback( m_wxwindow, this );
	472
	473	if (GTK_WIDGET_MAPPED(m_wxwindow))
	474	gtk_glwindow_map_callback( m_wxwindow, this );
	475
	476	return TRUE;
	477	}
	478
	479	wxGLCanvas::~wxGLCanvas()
	480	{
	481	GLXFBConfig * fbc = (GLXFBConfig *) m_fbc;
	482	if (fbc && m_canFreeFBC)
	483	XFree( fbc );
	484
	485	XVisualInfo vi = (XVisualInfo ) m_vi;
	486	if (vi && m_canFreeVi)
	487	XFree( vi );
	488
	489	delete m_glContext;
	490	}
	491
	492	void* wxGLCanvas::ChooseGLVisual(int *attribList)
	493	{
	494	int data[512];
	495	GetGLAttribListFromWX( attribList, data );
	496	attribList = (int*) data;
	497
	498	Display *dpy = GDK_DISPLAY();
	499
	500	return glXChooseVisual( dpy, DefaultScreen(dpy), attribList );
	501	}
	502
	503	void* wxGLCanvas::ChooseGLFBC(int *attribList)
	504	{
	505	int data[512];
	506	GetGLAttribListFromWX( attribList, data );
	507	attribList = (int*) data;
	508
	509	int returned;
	510	return glXChooseFBConfig( GDK_DISPLAY(), DefaultScreen(GDK_DISPLAY()),
	511	attribList, &returned );
	512	}
	513
	514
	515	void wxGLCanvas::GetGLAttribListFromWX(int wx_attribList, int gl_attribList )
	516	{
	517	if (!wx_attribList)
	518	{
	519	if (wxGLCanvas::GetGLXVersion() >= 13)
	520	// leave GLX >= 1.3 choose the default attributes
	521	gl_attribList[0] = 0;
	522	else
	523	{
	524	int i = 0;
	525	// default settings if attriblist = 0
	526	gl_attribList[i++] = GLX_RGBA;
	527	gl_attribList[i++] = GLX_DOUBLEBUFFER;
	528	gl_attribList[i++] = GLX_DEPTH_SIZE; gl_attribList[i++] = 1;
	529	gl_attribList[i++] = GLX_RED_SIZE; gl_attribList[i++] = 1;
	530	gl_attribList[i++] = GLX_GREEN_SIZE; gl_attribList[i++] = 1;
	531	gl_attribList[i++] = GLX_BLUE_SIZE; gl_attribList[i++] = 1;
	532	gl_attribList[i++] = GLX_ALPHA_SIZE; gl_attribList[i++] = 0;
	533	gl_attribList[i++] = None;
	534	}
	535	}
	536	else
	537	{
	538	int arg=0, p=0;
	539	while( (wx_attribList[arg]!=0) && (p<510) )
	540	{
	541	switch( wx_attribList[arg++] )
	542	{
	543	case WX_GL_RGBA:
	544	if (wxGLCanvas::GetGLXVersion() <= 12)
	545	// for GLX >= 1.3, GLX_RGBA is useless (setting this flags will crash on most opengl implm)
	546	gl_attribList[p++] = GLX_RGBA;
	547	break;
	548	case WX_GL_BUFFER_SIZE:
	549	gl_attribList[p++] = GLX_BUFFER_SIZE;
	550	gl_attribList[p++] = wx_attribList[arg++];
	551	break;
	552	case WX_GL_LEVEL:
	553	gl_attribList[p++] = GLX_LEVEL;
	554	gl_attribList[p++] = wx_attribList[arg++];
	555	break;
	556	case WX_GL_DOUBLEBUFFER:
	557	if (wxGLCanvas::GetGLXVersion() <= 12)
	558	gl_attribList[p++] = GLX_DOUBLEBUFFER;
	559	else
	560	// for GLX >= 1.3, GLX_DOUBLEBUFFER format is different (1 <=> True)
	561	// it seems this flag is useless for some hardware opengl implementation.
	562	// but for Mesa 6.2.1, this flag is used so don't ignore it.
	563	gl_attribList[p++] = GLX_DOUBLEBUFFER;
	564	gl_attribList[p++] = 1;
	565	break;
	566	case WX_GL_STEREO:
	567	gl_attribList[p++] = GLX_STEREO;
	568	break;
	569	case WX_GL_AUX_BUFFERS:
	570	gl_attribList[p++] = GLX_AUX_BUFFERS;
	571	gl_attribList[p++] = wx_attribList[arg++];
	572	break;
	573	case WX_GL_MIN_RED:
	574	gl_attribList[p++] = GLX_RED_SIZE;
	575	gl_attribList[p++] = wx_attribList[arg++];
	576	break;
	577	case WX_GL_MIN_GREEN:
	578	gl_attribList[p++] = GLX_GREEN_SIZE;
	579	gl_attribList[p++] = wx_attribList[arg++];
	580	break;
	581	case WX_GL_MIN_BLUE:
	582	gl_attribList[p++] = GLX_BLUE_SIZE;
	583	gl_attribList[p++] = wx_attribList[arg++];
	584	break;
	585	case WX_GL_MIN_ALPHA:
	586	gl_attribList[p++] = GLX_ALPHA_SIZE;
	587	gl_attribList[p++] = wx_attribList[arg++];
	588	break;
	589	case WX_GL_DEPTH_SIZE:
	590	gl_attribList[p++] = GLX_DEPTH_SIZE;
	591	gl_attribList[p++] = wx_attribList[arg++];
	592	break;
	593	case WX_GL_STENCIL_SIZE:
	594	gl_attribList[p++] = GLX_STENCIL_SIZE;
	595	gl_attribList[p++] = wx_attribList[arg++];
	596	break;
	597	case WX_GL_MIN_ACCUM_RED:
	598	gl_attribList[p++] = GLX_ACCUM_RED_SIZE;
	599	gl_attribList[p++] = wx_attribList[arg++];
	600	break;
	601	case WX_GL_MIN_ACCUM_GREEN:
	602	gl_attribList[p++] = GLX_ACCUM_GREEN_SIZE;
	603	gl_attribList[p++] = wx_attribList[arg++];
	604	break;
	605	case WX_GL_MIN_ACCUM_BLUE:
	606	gl_attribList[p++] = GLX_ACCUM_BLUE_SIZE;
	607	gl_attribList[p++] = wx_attribList[arg++];
	608	break;
	609	case WX_GL_MIN_ACCUM_ALPHA:
	610	gl_attribList[p++] = GLX_ACCUM_ALPHA_SIZE;
	611	gl_attribList[p++] = wx_attribList[arg++];
	612	break;
	613	default:
	614	break;
	615	}
	616	}
	617
	618	gl_attribList[p] = 0;
	619	}
	620	}
	621
	622	void wxGLCanvas::QueryGLXVersion()
	623	{
	624	if (m_glxVersion == 0)
	625	{
	626	// check the GLX version
	627	int glxMajorVer, glxMinorVer;
	628	bool ok = glXQueryVersion(GDK_DISPLAY(), &glxMajorVer, &glxMinorVer);
	629	wxASSERT_MSG( ok, _T("GLX version not found") );
	630	if (!ok)
	631	m_glxVersion = 10; // 1.0 by default
	632	else
	633	m_glxVersion = glxMajorVer*10 + glxMinorVer;
	634	}
	635	}
	636
	637	int wxGLCanvas::GetGLXVersion()
	638	{
	639	wxASSERT_MSG( m_glxVersion>0, _T("GLX version has not been initialized with wxGLCanvas::QueryGLXVersion()") );
	640	return m_glxVersion;
	641	}
	642
	643
	644	void wxGLCanvas::SwapBuffers()
	645	{
	646	if (m_glContext)
	647	m_glContext->SwapBuffers();
	648	}
	649
	650	void wxGLCanvas::OnSize(wxSizeEvent& WXUNUSED(event))
	651	{
	652	}
	653
	654	void wxGLCanvas::SetCurrent()
	655	{
	656	if (m_glContext)
	657	m_glContext->SetCurrent();
	658	}
	659
	660	void wxGLCanvas::SetColour( const wxChar *colour )
	661	{
	662	if (m_glContext)
	663	m_glContext->SetColour( colour );
	664	}
	665
	666	void wxGLCanvas::OnInternalIdle()
	667	{
	668	if (m_glContext && m_exposed)
	669	{
	670	wxPaintEvent event( GetId() );
	671	event.SetEventObject( this );
	672	GetEventHandler()->ProcessEvent( event );
	673
	674	m_exposed = FALSE;
	675	GetUpdateRegion().Clear();
	676	}
	677
	678	wxWindow::OnInternalIdle();
	679	}
	680
	681
	682
	683	//---------------------------------------------------------------------------
	684	// wxGLApp
	685	//---------------------------------------------------------------------------
	686
	687	IMPLEMENT_CLASS(wxGLApp, wxApp)
	688
	689	wxGLApp::~wxGLApp()
	690	{
	691	if (m_glFBCInfo)
	692	XFree(m_glFBCInfo);
	693	if (m_glVisualInfo)
	694	XFree(m_glVisualInfo);
	695	}
	696
	697	bool wxGLApp::InitGLVisual(int *attribList)
	698	{
	699	wxGLCanvas::QueryGLXVersion();
	700
	701	if (wxGLCanvas::GetGLXVersion() >= 13)
	702	{
	703	// GLX >= 1.3
	704	if (m_glFBCInfo)
	705	XFree(m_glFBCInfo);
	706	m_glFBCInfo = wxGLCanvas::ChooseGLFBC(attribList);
	707
	708	if (m_glFBCInfo)
	709	{
	710	if (m_glVisualInfo)
	711	XFree(m_glVisualInfo);
	712	m_glVisualInfo = glXGetVisualFromFBConfig(GDK_DISPLAY(), ((GLXFBConfig *)m_glFBCInfo)[0]);
	713	}
	714	return (m_glFBCInfo != NULL) && (m_glVisualInfo != NULL);
	715	}
	716	else
	717	{
	718	// GLX <= 1.2
	719	if (m_glVisualInfo)
	720	XFree(m_glVisualInfo);
	721	m_glVisualInfo = wxGLCanvas::ChooseGLVisual(attribList);
	722	return m_glVisualInfo != NULL;
	723	}
	724	}
	725
	726	#endif
	727	// wxUSE_GLCANVAS