src/gtk/glcanvas.cpp

/////////////////////////////////////////////////////////////////////////////
// Name:        gtk/glcanvas.cpp
// Purpose:     wxGLCanvas, for using OpenGL/Mesa with wxWindows and GTK
// Author:      Robert Roebling
// Modified by:
// Created:     17/08/98
// RCS-ID:      $Id$
// Copyright:   (c) Robert Roebling
// Licence:     wxWindows licence
/////////////////////////////////////////////////////////////////////////////

#ifdef __GNUG__
#pragma implementation "glcanvas.h"
#endif

#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"

//---------------------------------------------------------------------------
// 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;
    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;
    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);
    }

    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;
        glXMakeCurrent( GDK_DISPLAY(), GDK_WINDOW_XWINDOW(window), m_glContext );
    }
}

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)
    {
        r = (float)(col->Red()/256.0);
        g = (float)(col->Green()/256.0);
        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
//-----------------------------------------------------------------------------

static gint
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();

    win->m_glContext = new wxGLContext( TRUE, win, wxNullPalette, share );

    return FALSE;
}

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

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

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

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 );
}

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

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;

    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;
    }
    m_vi = vi;  // save for later use

    wxCHECK_MSG( m_vi, FALSE, _T("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 );

    wxWindow::Create( parent, id, pos, size, style, name );

    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 );

    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 );

    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 (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()
{
    XVisualInfo *vi = (XVisualInfo *) m_vi;

    if (vi && m_canFreeVi) XFree( vi );
    if (m_glContext) delete m_glContext;
}

void* wxGLCanvas::ChooseGLVisual(int *attribList)
{
    int data[512];
    if (!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;
    }
    else
    {
      int arg=0, p=0;

      while( (attribList[arg]!=0) && (p<510) )
      {
        switch( attribList[arg++] )
        {
          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;
        }
      }
      data[p] = 0;

      attribList = (int*) data;
    }


    Display *dpy = GDK_DISPLAY();

    return glXChooseVisual( dpy, DefaultScreen(dpy), attribList );
}

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_glVisualInfo)
        XFree(m_glVisualInfo);
}

bool wxGLApp::InitGLVisual(int *attribList)
{
    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 wxWindows 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	#ifdef __GNUG__
	13	#pragma implementation "glcanvas.h"
	14	#endif
	15
	16	#include "wx/setup.h"
	17
	18	#if wxUSE_GLCANVAS
	19
	20	#include "wx/glcanvas.h"
	21
	22	#include "wx/frame.h"
	23	#include "wx/colour.h"
	24	#include "wx/module.h"
	25	#include "wx/app.h"
	26
	27	extern "C"
	28	{
	29	#include "gtk/gtk.h"
	30	#include "gdk/gdk.h"
	31	#include "gdk/gdkx.h"
	32	}
	33
	34	#include "wx/gtk/win_gtk.h"
	35
	36	//---------------------------------------------------------------------------
	37	// global data
	38	//---------------------------------------------------------------------------
	39
	40	XVisualInfo g_vi = (XVisualInfo) NULL;
	41
	42	//-----------------------------------------------------------------------------
	43	// idle system
	44	//-----------------------------------------------------------------------------
	45
	46	extern void wxapp_install_idle_handler();
	47	extern bool g_isIdle;
	48
	49	//---------------------------------------------------------------------------
	50	// wxGLContext
	51	//---------------------------------------------------------------------------
	52
	53	IMPLEMENT_CLASS(wxGLContext,wxObject)
	54
	55	wxGLContext::wxGLContext( bool WXUNUSED(isRGB), wxWindow *win, const wxPalette& WXUNUSED(palette) )
	56	{
	57	m_window = win;
	58	m_widget = win->m_wxwindow;
	59
	60	wxGLCanvas gc = (wxGLCanvas) win;
	61	XVisualInfo vi = (XVisualInfo ) gc->m_vi;
	62
	63	wxCHECK_RET( vi, _T("invalid visual for OpenGl") );
	64
	65	m_glContext = glXCreateContext( GDK_DISPLAY(), vi, None, GL_TRUE );
	66
	67	wxCHECK_RET( m_glContext, _T("Couldn't create OpenGl context") );
	68	}
	69
	70	wxGLContext::wxGLContext(
	71	bool WXUNUSED(isRGB), wxWindow *win,
	72	const wxPalette& WXUNUSED(palette),
	73	const wxGLContext other / for sharing display lists */
	74	)
	75	{
	76	m_window = win;
	77	m_widget = win->m_wxwindow;
	78
	79	wxGLCanvas gc = (wxGLCanvas) win;
	80	XVisualInfo vi = (XVisualInfo ) gc->m_vi;
	81
	82	wxCHECK_RET( vi, _T("invalid visual for OpenGl") );
	83
	84	m_glContext = glXCreateContext( GDK_DISPLAY(), vi,
	85	other ? other->m_glContext : None,
	86	GL_TRUE );
	87
	88	if ( !m_glContext )
	89	{
	90	wxFAIL_MSG( _T("Couldn't create OpenGl context") );
	91	}
	92	}
	93
	94	wxGLContext::~wxGLContext()
	95	{
	96	if (!m_glContext) return;
	97
	98	if (m_glContext == glXGetCurrentContext())
	99	{
	100	glXMakeCurrent( GDK_DISPLAY(), None, NULL);
	101	}
	102
	103	glXDestroyContext( GDK_DISPLAY(), m_glContext );
	104	}
	105
	106	void wxGLContext::SwapBuffers()
	107	{
	108	if (m_glContext)
	109	{
	110	GdkWindow *window = GTK_PIZZA(m_widget)->bin_window;
	111	glXSwapBuffers( GDK_DISPLAY(), GDK_WINDOW_XWINDOW( window ) );
	112	}
	113	}
	114
	115	void wxGLContext::SetCurrent()
	116	{
	117	if (m_glContext)
	118	{
	119	GdkWindow *window = GTK_PIZZA(m_widget)->bin_window;
	120	glXMakeCurrent( GDK_DISPLAY(), GDK_WINDOW_XWINDOW(window), m_glContext );
	121	}
	122	}
	123
	124	void wxGLContext::SetColour(const wxChar *colour)
	125	{
	126	float r = 0.0;
	127	float g = 0.0;
	128	float b = 0.0;
	129	wxColour *col = wxTheColourDatabase->FindColour(colour);
	130	if (col)
	131	{
	132	r = (float)(col->Red()/256.0);
	133	g = (float)(col->Green()/256.0);
	134	b = (float)(col->Blue()/256.0);
	135	glColor3f( r, g, b);
	136	}
	137	}
	138
	139	void wxGLContext::SetupPixelFormat()
	140	{
	141	}
	142
	143	void wxGLContext::SetupPalette( const wxPalette& WXUNUSED(palette) )
	144	{
	145	}
	146
	147	wxPalette wxGLContext::CreateDefaultPalette()
	148	{
	149	return wxNullPalette;
	150	}
	151
	152	//-----------------------------------------------------------------------------
	153	// "realize" from m_wxwindow
	154	//-----------------------------------------------------------------------------
	155
	156	static gint
	157	gtk_glwindow_realized_callback( GtkWidget * WXUNUSED(widget), wxGLCanvas *win )
	158	{
	159	wxGLContext *share= win->m_sharedContext;
	160	if (share==NULL && win->m_sharedContextOf) share=win->m_sharedContextOf->GetContext();
	161
	162	win->m_glContext = new wxGLContext( TRUE, win, wxNullPalette, share );
	163
	164	return FALSE;
	165	}
	166
	167	//-----------------------------------------------------------------------------
	168	// "map" from m_wxwindow
	169	//-----------------------------------------------------------------------------
	170
	171	static gint
	172	gtk_glwindow_map_callback( GtkWidget * WXUNUSED(widget), wxGLCanvas *win )
	173	{
	174	if (win->m_glContext/* && win->m_exposed*/)
	175	{
	176	wxPaintEvent event( win->GetId() );
	177	event.SetEventObject( win );
	178	win->GetEventHandler()->ProcessEvent( event );
	179
	180	win->m_exposed = FALSE;
	181	win->GetUpdateRegion().Clear();
	182	}
	183
	184	return FALSE;
	185	}
	186
	187	//-----------------------------------------------------------------------------
	188	// "expose_event" of m_wxwindow
	189	//-----------------------------------------------------------------------------
	190
	191	static void
	192	gtk_glwindow_expose_callback( GtkWidget WXUNUSED(widget), GdkEventExpose gdk_event, wxGLCanvas *win )
	193	{
	194	if (g_isIdle)
	195	wxapp_install_idle_handler();
	196
	197	win->m_exposed = TRUE;
	198
	199	win->GetUpdateRegion().Union( gdk_event->area.x,
	200	gdk_event->area.y,
	201	gdk_event->area.width,
	202	gdk_event->area.height );
	203	}
	204
	205	//-----------------------------------------------------------------------------
	206	// "draw" of m_wxwindow
	207	//-----------------------------------------------------------------------------
	208
	209	static void
	210	gtk_glwindow_draw_callback( GtkWidget WXUNUSED(widget), GdkRectangle rect, wxGLCanvas *win )
	211	{
	212	if (g_isIdle)
	213	wxapp_install_idle_handler();
	214
	215	win->m_exposed = TRUE;
	216
	217	win->GetUpdateRegion().Union( rect->x, rect->y,
	218	rect->width, rect->height );
	219	}
	220
	221	//-----------------------------------------------------------------------------
	222	// "size_allocate" of m_wxwindow
	223	//-----------------------------------------------------------------------------
	224
	225	static void
	226	gtk_glcanvas_size_callback( GtkWidget WXUNUSED(widget), GtkAllocation alloc, wxGLCanvas *win )
	227	{
	228	if (g_isIdle)
	229	wxapp_install_idle_handler();
	230
	231	if (!win->m_hasVMT)
	232	return;
	233
	234	wxSizeEvent event( wxSize(win->m_width,win->m_height), win->GetId() );
	235	event.SetEventObject( win );
	236	win->GetEventHandler()->ProcessEvent( event );
	237	}
	238
	239	//---------------------------------------------------------------------------
	240	// wxGlCanvas
	241	//---------------------------------------------------------------------------
	242
	243	IMPLEMENT_CLASS(wxGLCanvas, wxWindow)
	244
	245	BEGIN_EVENT_TABLE(wxGLCanvas, wxWindow)
	246	EVT_SIZE(wxGLCanvas::OnSize)
	247	END_EVENT_TABLE()
	248
	249	wxGLCanvas::wxGLCanvas( wxWindow *parent, wxWindowID id,
	250	const wxPoint& pos, const wxSize& size,
	251	long style, const wxString& name,
	252	int *attribList,
	253	const wxPalette& palette )
	254	{
	255	Create( parent, NULL, NULL, id, pos, size, style, name, attribList, palette );
	256	}
	257
	258	wxGLCanvas::wxGLCanvas( wxWindow *parent,
	259	const wxGLContext *shared,
	260	wxWindowID id,
	261	const wxPoint& pos, const wxSize& size,
	262	long style, const wxString& name,
	263	int *attribList,
	264	const wxPalette& palette )
	265	{
	266	Create( parent, shared, NULL, id, pos, size, style, name, attribList, palette );
	267	}
	268
	269	wxGLCanvas::wxGLCanvas( wxWindow *parent,
	270	const wxGLCanvas *shared,
	271	wxWindowID id,
	272	const wxPoint& pos, const wxSize& size,
	273	long style, const wxString& name,
	274	int *attribList,
	275	const wxPalette& palette )
	276	{
	277	Create( parent, NULL, shared, id, pos, size, style, name, attribList, palette );
	278	}
	279
	280	bool wxGLCanvas::Create( wxWindow *parent,
	281	const wxGLContext *shared,
	282	const wxGLCanvas *shared_context_of,
	283	wxWindowID id,
	284	const wxPoint& pos, const wxSize& size,
	285	long style, const wxString& name,
	286	int *attribList,
	287	const wxPalette& palette)
	288	{
	289	m_sharedContext = (wxGLContext*)shared; // const_cast
	290	m_sharedContextOf = (wxGLCanvas*)shared_context_of; // const_cast
	291	m_glContext = (wxGLContext*) NULL;
	292
	293	m_exposed = FALSE;
	294	m_noExpose = TRUE;
	295	m_nativeSizeEvent = TRUE;
	296
	297	XVisualInfo *vi = NULL;
	298	if (wxTheApp->m_glVisualInfo != NULL)
	299	{
	300	vi = (XVisualInfo *) wxTheApp->m_glVisualInfo;
	301	m_canFreeVi = FALSE; // owned by wxTheApp - don't free upon destruction
	302	}
	303	else
	304	{
	305	vi = (XVisualInfo *) ChooseGLVisual(attribList);
	306	m_canFreeVi = TRUE;
	307	}
	308	m_vi = vi; // save for later use
	309
	310	wxCHECK_MSG( m_vi, FALSE, _T("required visual couldn't be found") );
	311
	312	GdkVisual *visual = gdkx_visual_get( vi->visualid );
	313	GdkColormap *colormap = gdk_colormap_new( gdkx_visual_get(vi->visualid), TRUE );
	314
	315	gtk_widget_push_colormap( colormap );
	316	gtk_widget_push_visual( visual );
	317
	318	wxWindow::Create( parent, id, pos, size, style, name );
	319
	320	m_glWidget = m_wxwindow;
	321
	322	gtk_pizza_set_clear( GTK_PIZZA(m_wxwindow), FALSE );
	323
	324	gtk_signal_connect( GTK_OBJECT(m_wxwindow), "realize",
	325	GTK_SIGNAL_FUNC(gtk_glwindow_realized_callback), (gpointer) this );
	326
	327	gtk_signal_connect( GTK_OBJECT(m_wxwindow), "map",
	328	GTK_SIGNAL_FUNC(gtk_glwindow_map_callback), (gpointer) this );
	329
	330	gtk_signal_connect( GTK_OBJECT(m_wxwindow), "expose_event",
	331	GTK_SIGNAL_FUNC(gtk_glwindow_expose_callback), (gpointer)this );
	332
	333	gtk_signal_connect( GTK_OBJECT(m_wxwindow), "draw",
	334	GTK_SIGNAL_FUNC(gtk_glwindow_draw_callback), (gpointer)this );
	335
	336	gtk_signal_connect( GTK_OBJECT(m_widget), "size_allocate",
	337	GTK_SIGNAL_FUNC(gtk_glcanvas_size_callback), (gpointer)this );
	338
	339	gtk_widget_pop_visual();
	340	gtk_widget_pop_colormap();
	341
	342	if (GTK_WIDGET_REALIZED(m_wxwindow))
	343	gtk_glwindow_realized_callback( m_wxwindow, this );
	344
	345	if (GTK_WIDGET_MAPPED(m_wxwindow))
	346	gtk_glwindow_map_callback( m_wxwindow, this );
	347
	348	return TRUE;
	349	}
	350
	351	wxGLCanvas::~wxGLCanvas()
	352	{
	353	XVisualInfo vi = (XVisualInfo ) m_vi;
	354
	355	if (vi && m_canFreeVi) XFree( vi );
	356	if (m_glContext) delete m_glContext;
	357	}
	358
	359	void* wxGLCanvas::ChooseGLVisual(int *attribList)
	360	{
	361	int data[512];
	362	if (!attribList)
	363	{
	364	// default settings if attriblist = 0
	365	data[0] = GLX_RGBA;
	366	data[1] = GLX_DOUBLEBUFFER;
	367	data[2] = GLX_DEPTH_SIZE; data[3] = 1;
	368	data[4] = GLX_RED_SIZE; data[5] = 1;
	369	data[6] = GLX_GREEN_SIZE; data[7] = 1;
	370	data[8] = GLX_BLUE_SIZE; data[9] = 1;
	371	data[10] = GLX_ALPHA_SIZE; data[11] = 0;
	372	data[12] = None;
	373
	374	attribList = (int*) data;
	375	}
	376	else
	377	{
	378	int arg=0, p=0;
	379
	380	while( (attribList[arg]!=0) && (p<510) )
	381	{
	382	switch( attribList[arg++] )
	383	{
	384	case WX_GL_RGBA: data[p++] = GLX_RGBA; break;
	385	case WX_GL_BUFFER_SIZE:
	386	data[p++]=GLX_BUFFER_SIZE; data[p++]=attribList[arg++]; break;
	387	case WX_GL_LEVEL:
	388	data[p++]=GLX_LEVEL; data[p++]=attribList[arg++]; break;
	389	case WX_GL_DOUBLEBUFFER: data[p++] = GLX_DOUBLEBUFFER; break;
	390	case WX_GL_STEREO: data[p++] = GLX_STEREO; break;
	391	case WX_GL_AUX_BUFFERS:
	392	data[p++]=GLX_AUX_BUFFERS; data[p++]=attribList[arg++]; break;
	393	case WX_GL_MIN_RED:
	394	data[p++]=GLX_RED_SIZE; data[p++]=attribList[arg++]; break;
	395	case WX_GL_MIN_GREEN:
	396	data[p++]=GLX_GREEN_SIZE; data[p++]=attribList[arg++]; break;
	397	case WX_GL_MIN_BLUE:
	398	data[p++]=GLX_BLUE_SIZE; data[p++]=attribList[arg++]; break;
	399	case WX_GL_MIN_ALPHA:
	400	data[p++]=GLX_ALPHA_SIZE; data[p++]=attribList[arg++]; break;
	401	case WX_GL_DEPTH_SIZE:
	402	data[p++]=GLX_DEPTH_SIZE; data[p++]=attribList[arg++]; break;
	403	case WX_GL_STENCIL_SIZE:
	404	data[p++]=GLX_STENCIL_SIZE; data[p++]=attribList[arg++]; break;
	405	case WX_GL_MIN_ACCUM_RED:
	406	data[p++]=GLX_ACCUM_RED_SIZE; data[p++]=attribList[arg++]; break;
	407	case WX_GL_MIN_ACCUM_GREEN:
	408	data[p++]=GLX_ACCUM_GREEN_SIZE; data[p++]=attribList[arg++]; break;
	409	case WX_GL_MIN_ACCUM_BLUE:
	410	data[p++]=GLX_ACCUM_BLUE_SIZE; data[p++]=attribList[arg++]; break;
	411	case WX_GL_MIN_ACCUM_ALPHA:
	412	data[p++]=GLX_ACCUM_ALPHA_SIZE; data[p++]=attribList[arg++]; break;
	413	default:
	414	break;
	415	}
	416	}
	417	data[p] = 0;
	418
	419	attribList = (int*) data;
	420	}
	421
	422
	423	Display *dpy = GDK_DISPLAY();
	424
	425	return glXChooseVisual( dpy, DefaultScreen(dpy), attribList );
	426	}
	427
	428	void wxGLCanvas::SwapBuffers()
	429	{
	430	if (m_glContext)
	431	m_glContext->SwapBuffers();
	432	}
	433
	434	void wxGLCanvas::OnSize(wxSizeEvent& WXUNUSED(event))
	435	{
	436	}
	437
	438	void wxGLCanvas::SetCurrent()
	439	{
	440	if (m_glContext)
	441	m_glContext->SetCurrent();
	442	}
	443
	444	void wxGLCanvas::SetColour( const wxChar *colour )
	445	{
	446	if (m_glContext)
	447	m_glContext->SetColour( colour );
	448	}
	449
	450	void wxGLCanvas::OnInternalIdle()
	451	{
	452	if (m_glContext && m_exposed)
	453	{
	454	wxPaintEvent event( GetId() );
	455	event.SetEventObject( this );
	456	GetEventHandler()->ProcessEvent( event );
	457
	458	m_exposed = FALSE;
	459	GetUpdateRegion().Clear();
	460	}
	461
	462	wxWindow::OnInternalIdle();
	463	}
	464
	465
	466
	467	//---------------------------------------------------------------------------
	468	// wxGLApp
	469	//---------------------------------------------------------------------------
	470
	471	IMPLEMENT_CLASS(wxGLApp, wxApp)
	472
	473	wxGLApp::~wxGLApp()
	474	{
	475	if (m_glVisualInfo)
	476	XFree(m_glVisualInfo);
	477	}
	478
	479	bool wxGLApp::InitGLVisual(int *attribList)
	480	{
	481	if (m_glVisualInfo)
	482	XFree(m_glVisualInfo);
	483
	484	m_glVisualInfo = wxGLCanvas::ChooseGLVisual(attribList);
	485
	486	return m_glVisualInfo != NULL;
	487	}
	488
	489	#endif
	490	// wxUSE_GLCANVAS
	491