src/gtk1/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
/////////////////////////////////////////////////////////////////////////////

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