src/mac/carbon/glcanvas.cpp

/////////////////////////////////////////////////////////////////////////////
// Name:        glcanvas.cpp
// Purpose:     wxGLCanvas, for using OpenGL with wxWidgets under Macintosh
// Author:      Stefan Csomor
// Modified by:
// Created:     1998-01-01
// RCS-ID:      $Id$
// Copyright:   (c) Stefan Csomor
// Licence:       wxWindows licence
/////////////////////////////////////////////////////////////////////////////

#include "wx/wxprec.h"

#if defined(__BORLANDC__)
#pragma hdrstop
#endif

#if wxUSE_GLCANVAS

#ifndef WX_PRECOMP
#include "wx/frame.h"
#endif

#include "wx/settings.h"
#include "wx/log.h"

#include "wx/glcanvas.h"
#include "wx/mac/uma.h"

// DLL options compatibility check:
#include "wx/build.h"
WX_CHECK_BUILD_OPTIONS("wxGL")

/*
* GLContext implementation
*/

wxGLContext::wxGLContext(
                         AGLPixelFormat fmt, wxGLCanvas *win,
                         const wxPalette& palette,
                         const wxGLContext *other        /* for sharing display lists */
                         )
{
    m_window = win;

    m_drawable = (AGLDrawable) UMAGetWindowPort(MAC_WXHWND(win->MacGetTopLevelWindowRef()));

    m_glContext = aglCreateContext(fmt, other ? other->m_glContext : NULL);
    wxCHECK_RET( m_glContext, wxT("Couldn't create OpenGl context") );

    GLboolean b;
    b = aglSetDrawable(m_glContext, m_drawable);
    wxCHECK_RET( b, wxT("Couldn't bind OpenGl context") );
    aglEnable(m_glContext , AGL_BUFFER_RECT ) ;
    b = aglSetCurrentContext(m_glContext);
    wxCHECK_RET( b, wxT("Couldn't activate OpenGl context") );
}

wxGLContext::~wxGLContext()
{
    if (m_glContext)
    {
        aglSetCurrentContext(NULL);
        aglDestroyContext(m_glContext);
    }
}

void wxGLContext::SwapBuffers()
{
    if (m_glContext)
    {
        aglSwapBuffers(m_glContext);
    }
}

void wxGLContext::SetCurrent()
{
    if (m_glContext)
    {
        aglSetCurrentContext(m_glContext);
    }
}

void wxGLContext::Update()
{
    if (m_glContext)
    {
        aglUpdateContext(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);
    }
}


/*
* wxGLCanvas implementation
*/

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, 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, 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, shared ? shared->GetContext() : NULL, id, pos, size, style, name, attribList, palette);
}

wxGLCanvas::~wxGLCanvas()
{
    if (m_glContext != NULL) {
        delete m_glContext;
        m_glContext = NULL;
    }
}

static AGLPixelFormat ChoosePixelFormat(const int *attribList)
{
    GLint data[512];
    GLint defaultAttribs[] = { AGL_RGBA,
        AGL_DOUBLEBUFFER,
        AGL_MINIMUM_POLICY,
        AGL_DEPTH_SIZE, 1,  // use largest available depth buffer
        AGL_RED_SIZE, 1,
        AGL_GREEN_SIZE, 1,
        AGL_BLUE_SIZE, 1,
        AGL_ALPHA_SIZE, 0,
        AGL_NONE };
    GLint *attribs;
    if (!attribList)
    {
        attribs = defaultAttribs;
    }
    else
    {
        int arg=0, p=0;

        data[p++] = AGL_MINIMUM_POLICY; // make _SIZE tags behave more like GLX
        while( (attribList[arg]!=0) && (p<512) )
        {
            switch( attribList[arg++] )
            {
            case WX_GL_RGBA: data[p++] = AGL_RGBA; break;
            case WX_GL_BUFFER_SIZE:
                data[p++]=AGL_BUFFER_SIZE; data[p++]=attribList[arg++]; break;
            case WX_GL_LEVEL:
                data[p++]=AGL_LEVEL; data[p++]=attribList[arg++]; break;
            case WX_GL_DOUBLEBUFFER: data[p++] = AGL_DOUBLEBUFFER; break;
            case WX_GL_STEREO: data[p++] = AGL_STEREO; break;
            case WX_GL_AUX_BUFFERS:
                data[p++]=AGL_AUX_BUFFERS; data[p++]=attribList[arg++]; break;
            case WX_GL_MIN_RED:
                data[p++]=AGL_RED_SIZE; data[p++]=attribList[arg++]; break;
            case WX_GL_MIN_GREEN:
                data[p++]=AGL_GREEN_SIZE; data[p++]=attribList[arg++]; break;
            case WX_GL_MIN_BLUE:
                data[p++]=AGL_BLUE_SIZE; data[p++]=attribList[arg++]; break;
            case WX_GL_MIN_ALPHA:
                data[p++]=AGL_ALPHA_SIZE; data[p++]=attribList[arg++]; break;
            case WX_GL_DEPTH_SIZE:
                data[p++]=AGL_DEPTH_SIZE; data[p++]=attribList[arg++]; break;
            case WX_GL_STENCIL_SIZE:
                data[p++]=AGL_STENCIL_SIZE; data[p++]=attribList[arg++]; break;
            case WX_GL_MIN_ACCUM_RED:
                data[p++]=AGL_ACCUM_RED_SIZE; data[p++]=attribList[arg++]; break;
            case WX_GL_MIN_ACCUM_GREEN:
                data[p++]=AGL_ACCUM_GREEN_SIZE; data[p++]=attribList[arg++]; break;
            case WX_GL_MIN_ACCUM_BLUE:
                data[p++]=AGL_ACCUM_BLUE_SIZE; data[p++]=attribList[arg++]; break;
            case WX_GL_MIN_ACCUM_ALPHA:
                data[p++]=AGL_ACCUM_ALPHA_SIZE; data[p++]=attribList[arg++]; break;
            default:
                break;
            }
        }
        data[p] = 0;

        attribs = data;
    }

    return aglChoosePixelFormat(NULL, 0, attribs);
}

bool wxGLCanvas::Create(wxWindow *parent, const wxGLContext *shared, wxWindowID id,
                        const wxPoint& pos, const wxSize& size, long style, const wxString& name,
                        int *attribList, const wxPalette& palette)
{
    m_macCanvasIsShown = false ;
    m_glContext = 0 ;
    wxWindow::Create( parent, id, pos, size, style, name );

    AGLPixelFormat fmt = ChoosePixelFormat(attribList);
    wxCHECK_MSG( fmt, false, wxT("Couldn't create OpenGl pixel format") );

    m_glContext = new wxGLContext(fmt, this, palette, shared);
    m_macCanvasIsShown = true ;
    aglDestroyPixelFormat(fmt);

    return true;
}

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

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

void wxGLCanvas::SetViewport()
{
    // viewport is initially set to entire port
    // adjust glViewport to just this window
    int x = 0 ;
    int y = 0 ;

    wxWindow* iter = this ;
    while( iter->GetParent() )
    {
    	iter = iter->GetParent() ;
    }

    if ( iter && iter->IsTopLevel() )
    {
	    MacClientToRootWindow( &x , &y ) ;
	    int width, height;
	    GetClientSize(& width, & height);
	    Rect bounds ;
	    GetWindowPortBounds( MAC_WXHWND(MacGetTopLevelWindowRef()) , &bounds ) ;
	    GLint parms[4] ;
	    parms[0] = x ;
	    parms[1] = bounds.bottom - bounds.top - ( y + height ) ;
	    parms[2] = width ;
	    parms[3] = height ;

	    if ( !m_macCanvasIsShown )
	    	parms[0] += 20000 ;
	    aglSetInteger( m_glContext->m_glContext , AGL_BUFFER_RECT , parms ) ;
   	}
}

void wxGLCanvas::OnSize(wxSizeEvent& event)
{
    MacUpdateView() ;
}

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

void wxGLCanvas::MacSuperChangedPosition()
{
    MacUpdateView() ;
    wxWindow::MacSuperChangedPosition() ;
}

void wxGLCanvas::MacTopLevelWindowChangedPosition()
{
    MacUpdateView() ;
    wxWindow::MacTopLevelWindowChangedPosition() ;
}

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

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

bool wxGLCanvas::Show(bool show)
{
    if ( !wxWindow::Show( show ) )
        return FALSE ;
/*
    if ( !show )
    {
        if ( m_macCanvasIsShown )
        {
            m_macCanvasIsShown = false ;
            SetViewport() ;
        }
    }
    else
    {
        if ( m_peer->IsVisible()&& !m_macCanvasIsShown )
        {
            m_macCanvasIsShown = true ;
            SetViewport() ;
        }
    }
*/
    return TRUE ;
}

void wxGLCanvas::MacVisibilityChanged()
{
    if ( !MacIsReallyShown() )
    {
        if ( m_macCanvasIsShown )
        {
            m_macCanvasIsShown = false ;
            SetViewport() ;
        }
    }
    else
    {
        if ( !m_macCanvasIsShown )
        {
            m_macCanvasIsShown = true ;
            SetViewport() ;
        }
    }
    wxWindowMac::MacVisibilityChanged() ;
}

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

IMPLEMENT_CLASS(wxGLApp, wxApp)

bool wxGLApp::InitGLVisual(int *attribList)
{
    AGLPixelFormat fmt = ChoosePixelFormat(attribList);
    if (fmt != NULL) {
        aglDestroyPixelFormat(fmt);
        return true;
    } else
        return false;
}

wxGLApp::~wxGLApp(void)
{
}

#endif // wxUSE_GLCANVAS
Commit	Line	Data
	1	/////////////////////////////////////////////////////////////////////////////
	2	// Name: glcanvas.cpp
	3	// Purpose: wxGLCanvas, for using OpenGL with wxWidgets under Macintosh
	4	// Author: Stefan Csomor
	5	// Modified by:
	6	// Created: 1998-01-01
	7	// RCS-ID: $Id$
	8	// Copyright: (c) Stefan Csomor
	9	// Licence: wxWindows licence
	10	/////////////////////////////////////////////////////////////////////////////
	11
	12	#include "wx/wxprec.h"
	13
	14	#if defined(__BORLANDC__)
	15	#pragma hdrstop
	16	#endif
	17
	18	#if wxUSE_GLCANVAS
	19
	20	#ifndef WX_PRECOMP
	21	#include "wx/frame.h"
	22	#endif
	23
	24	#include "wx/settings.h"
	25	#include "wx/log.h"
	26
	27	#include "wx/glcanvas.h"
	28	#include "wx/mac/uma.h"
	29
	30	// DLL options compatibility check:
	31	#include "wx/build.h"
	32	WX_CHECK_BUILD_OPTIONS("wxGL")
	33
	34	/*
	35	* GLContext implementation
	36	*/
	37
	38	wxGLContext::wxGLContext(
	39	AGLPixelFormat fmt, wxGLCanvas *win,
	40	const wxPalette& palette,
	41	const wxGLContext other / for sharing display lists */
	42	)
	43	{
	44	m_window = win;
	45
	46	m_drawable = (AGLDrawable) UMAGetWindowPort(MAC_WXHWND(win->MacGetTopLevelWindowRef()));
	47
	48	m_glContext = aglCreateContext(fmt, other ? other->m_glContext : NULL);
	49	wxCHECK_RET( m_glContext, wxT("Couldn't create OpenGl context") );
	50
	51	GLboolean b;
	52	b = aglSetDrawable(m_glContext, m_drawable);
	53	wxCHECK_RET( b, wxT("Couldn't bind OpenGl context") );
	54	aglEnable(m_glContext , AGL_BUFFER_RECT ) ;
	55	b = aglSetCurrentContext(m_glContext);
	56	wxCHECK_RET( b, wxT("Couldn't activate OpenGl context") );
	57	}
	58
	59	wxGLContext::~wxGLContext()
	60	{
	61	if (m_glContext)
	62	{
	63	aglSetCurrentContext(NULL);
	64	aglDestroyContext(m_glContext);
	65	}
	66	}
	67
	68	void wxGLContext::SwapBuffers()
	69	{
	70	if (m_glContext)
	71	{
	72	aglSwapBuffers(m_glContext);
	73	}
	74	}
	75
	76	void wxGLContext::SetCurrent()
	77	{
	78	if (m_glContext)
	79	{
	80	aglSetCurrentContext(m_glContext);
	81	}
	82	}
	83
	84	void wxGLContext::Update()
	85	{
	86	if (m_glContext)
	87	{
	88	aglUpdateContext(m_glContext);
	89	}
	90	}
	91
	92	void wxGLContext::SetColour(const wxChar *colour)
	93	{
	94	wxColour col = wxTheColourDatabase->Find(colour);
	95	if (col.Ok())
	96	{
	97	float r = (float)(col.Red()/256.0);
	98	float g = (float)(col.Green()/256.0);
	99	float b = (float)(col.Blue()/256.0);
	100	glColor3f( r, g, b);
	101	}
	102	}
	103
	104
	105	/*
	106	* wxGLCanvas implementation
	107	*/
	108
	109	IMPLEMENT_CLASS(wxGLCanvas, wxWindow)
	110
	111	BEGIN_EVENT_TABLE(wxGLCanvas, wxWindow)
	112	EVT_SIZE(wxGLCanvas::OnSize)
	113	END_EVENT_TABLE()
	114
	115	wxGLCanvas::wxGLCanvas(wxWindow *parent, wxWindowID id,
	116	const wxPoint& pos, const wxSize& size, long style, const wxString& name,
	117	int *attribList, const wxPalette& palette)
	118	{
	119	Create(parent, NULL, id, pos, size, style, name, attribList, palette);
	120	}
	121
	122	wxGLCanvas::wxGLCanvas( wxWindow *parent,
	123	const wxGLContext *shared, wxWindowID id,
	124	const wxPoint& pos, const wxSize& size, long style, const wxString& name,
	125	int *attribList, const wxPalette& palette )
	126	{
	127	Create(parent, shared, id, pos, size, style, name, attribList, palette);
	128	}
	129
	130	wxGLCanvas::wxGLCanvas( wxWindow parent, const wxGLCanvas shared, wxWindowID id,
	131	const wxPoint& pos, const wxSize& size, long style, const wxString& name,
	132	int *attribList, const wxPalette& palette )
	133	{
	134	Create(parent, shared ? shared->GetContext() : NULL, id, pos, size, style, name, attribList, palette);
	135	}
	136
	137	wxGLCanvas::~wxGLCanvas()
	138	{
	139	if (m_glContext != NULL) {
	140	delete m_glContext;
	141	m_glContext = NULL;
	142	}
	143	}
	144
	145	static AGLPixelFormat ChoosePixelFormat(const int *attribList)
	146	{
	147	GLint data[512];
	148	GLint defaultAttribs[] = { AGL_RGBA,
	149	AGL_DOUBLEBUFFER,
	150	AGL_MINIMUM_POLICY,
	151	AGL_DEPTH_SIZE, 1, // use largest available depth buffer
	152	AGL_RED_SIZE, 1,
	153	AGL_GREEN_SIZE, 1,
	154	AGL_BLUE_SIZE, 1,
	155	AGL_ALPHA_SIZE, 0,
	156	AGL_NONE };
	157	GLint *attribs;
	158	if (!attribList)
	159	{
	160	attribs = defaultAttribs;
	161	}
	162	else
	163	{
	164	int arg=0, p=0;
	165
	166	data[p++] = AGL_MINIMUM_POLICY; // make _SIZE tags behave more like GLX
	167	while( (attribList[arg]!=0) && (p<512) )
	168	{
	169	switch( attribList[arg++] )
	170	{
	171	case WX_GL_RGBA: data[p++] = AGL_RGBA; break;
	172	case WX_GL_BUFFER_SIZE:
	173	data[p++]=AGL_BUFFER_SIZE; data[p++]=attribList[arg++]; break;
	174	case WX_GL_LEVEL:
	175	data[p++]=AGL_LEVEL; data[p++]=attribList[arg++]; break;
	176	case WX_GL_DOUBLEBUFFER: data[p++] = AGL_DOUBLEBUFFER; break;
	177	case WX_GL_STEREO: data[p++] = AGL_STEREO; break;
	178	case WX_GL_AUX_BUFFERS:
	179	data[p++]=AGL_AUX_BUFFERS; data[p++]=attribList[arg++]; break;
	180	case WX_GL_MIN_RED:
	181	data[p++]=AGL_RED_SIZE; data[p++]=attribList[arg++]; break;
	182	case WX_GL_MIN_GREEN:
	183	data[p++]=AGL_GREEN_SIZE; data[p++]=attribList[arg++]; break;
	184	case WX_GL_MIN_BLUE:
	185	data[p++]=AGL_BLUE_SIZE; data[p++]=attribList[arg++]; break;
	186	case WX_GL_MIN_ALPHA:
	187	data[p++]=AGL_ALPHA_SIZE; data[p++]=attribList[arg++]; break;
	188	case WX_GL_DEPTH_SIZE:
	189	data[p++]=AGL_DEPTH_SIZE; data[p++]=attribList[arg++]; break;
	190	case WX_GL_STENCIL_SIZE:
	191	data[p++]=AGL_STENCIL_SIZE; data[p++]=attribList[arg++]; break;
	192	case WX_GL_MIN_ACCUM_RED:
	193	data[p++]=AGL_ACCUM_RED_SIZE; data[p++]=attribList[arg++]; break;
	194	case WX_GL_MIN_ACCUM_GREEN:
	195	data[p++]=AGL_ACCUM_GREEN_SIZE; data[p++]=attribList[arg++]; break;
	196	case WX_GL_MIN_ACCUM_BLUE:
	197	data[p++]=AGL_ACCUM_BLUE_SIZE; data[p++]=attribList[arg++]; break;
	198	case WX_GL_MIN_ACCUM_ALPHA:
	199	data[p++]=AGL_ACCUM_ALPHA_SIZE; data[p++]=attribList[arg++]; break;
	200	default:
	201	break;
	202	}
	203	}
	204	data[p] = 0;
	205
	206	attribs = data;
	207	}
	208
	209	return aglChoosePixelFormat(NULL, 0, attribs);
	210	}
	211
	212	bool wxGLCanvas::Create(wxWindow parent, const wxGLContext shared, wxWindowID id,
	213	const wxPoint& pos, const wxSize& size, long style, const wxString& name,
	214	int *attribList, const wxPalette& palette)
	215	{
	216	m_macCanvasIsShown = false ;
	217	m_glContext = 0 ;
	218	wxWindow::Create( parent, id, pos, size, style, name );
	219
	220	AGLPixelFormat fmt = ChoosePixelFormat(attribList);
	221	wxCHECK_MSG( fmt, false, wxT("Couldn't create OpenGl pixel format") );
	222
	223	m_glContext = new wxGLContext(fmt, this, palette, shared);
	224	m_macCanvasIsShown = true ;
	225	aglDestroyPixelFormat(fmt);
	226
	227	return true;
	228	}
	229
	230	void wxGLCanvas::SwapBuffers()
	231	{
	232	if (m_glContext)
	233	m_glContext->SwapBuffers();
	234	}
	235
	236	void wxGLCanvas::UpdateContext()
	237	{
	238	if (m_glContext)
	239	m_glContext->Update();
	240	}
	241
	242	void wxGLCanvas::SetViewport()
	243	{
	244	// viewport is initially set to entire port
	245	// adjust glViewport to just this window
	246	int x = 0 ;
	247	int y = 0 ;
	248
	249	wxWindow* iter = this ;
	250	while( iter->GetParent() )
	251	{
	252	iter = iter->GetParent() ;
	253	}
	254
	255	if ( iter && iter->IsTopLevel() )
	256	{
	257	MacClientToRootWindow( &x , &y ) ;
	258	int width, height;
	259	GetClientSize(& width, & height);
	260	Rect bounds ;
	261	GetWindowPortBounds( MAC_WXHWND(MacGetTopLevelWindowRef()) , &bounds ) ;
	262	GLint parms[4] ;
	263	parms[0] = x ;
	264	parms[1] = bounds.bottom - bounds.top - ( y + height ) ;
	265	parms[2] = width ;
	266	parms[3] = height ;
	267
	268	if ( !m_macCanvasIsShown )
	269	parms[0] += 20000 ;
	270	aglSetInteger( m_glContext->m_glContext , AGL_BUFFER_RECT , parms ) ;
	271	}
	272	}
	273
	274	void wxGLCanvas::OnSize(wxSizeEvent& event)
	275	{
	276	MacUpdateView() ;
	277	}
	278
	279	void wxGLCanvas::MacUpdateView()
	280	{
	281	if (m_glContext)
	282	{
	283	UpdateContext();
	284	m_glContext->SetCurrent();
	285	SetViewport();
	286	}
	287	}
	288
	289	void wxGLCanvas::MacSuperChangedPosition()
	290	{
	291	MacUpdateView() ;
	292	wxWindow::MacSuperChangedPosition() ;
	293	}
	294
	295	void wxGLCanvas::MacTopLevelWindowChangedPosition()
	296	{
	297	MacUpdateView() ;
	298	wxWindow::MacTopLevelWindowChangedPosition() ;
	299	}
	300
	301	void wxGLCanvas::SetCurrent()
	302	{
	303	if (m_glContext)
	304	{
	305	m_glContext->SetCurrent();
	306	}
	307	}
	308
	309	void wxGLCanvas::SetColour(const wxChar *colour)
	310	{
	311	if (m_glContext)
	312	m_glContext->SetColour(colour);
	313	}
	314
	315	bool wxGLCanvas::Show(bool show)
	316	{
	317	if ( !wxWindow::Show( show ) )
	318	return FALSE ;
	319	/*
	320	if ( !show )
	321	{
	322	if ( m_macCanvasIsShown )
	323	{
	324	m_macCanvasIsShown = false ;
	325	SetViewport() ;
	326	}
	327	}
	328	else
	329	{
	330	if ( m_peer->IsVisible()&& !m_macCanvasIsShown )
	331	{
	332	m_macCanvasIsShown = true ;
	333	SetViewport() ;
	334	}
	335	}
	336	*/
	337	return TRUE ;
	338	}
	339
	340	void wxGLCanvas::MacVisibilityChanged()
	341	{
	342	if ( !MacIsReallyShown() )
	343	{
	344	if ( m_macCanvasIsShown )
	345	{
	346	m_macCanvasIsShown = false ;
	347	SetViewport() ;
	348	}
	349	}
	350	else
	351	{
	352	if ( !m_macCanvasIsShown )
	353	{
	354	m_macCanvasIsShown = true ;
	355	SetViewport() ;
	356	}
	357	}
	358	wxWindowMac::MacVisibilityChanged() ;
	359	}
	360
	361	//---------------------------------------------------------------------------
	362	// wxGLApp
	363	//---------------------------------------------------------------------------
	364
	365	IMPLEMENT_CLASS(wxGLApp, wxApp)
	366
	367	bool wxGLApp::InitGLVisual(int *attribList)
	368	{
	369	AGLPixelFormat fmt = ChoosePixelFormat(attribList);
	370	if (fmt != NULL) {
	371	aglDestroyPixelFormat(fmt);
	372	return true;
	373	} else
	374	return false;
	375	}
	376
	377	wxGLApp::~wxGLApp(void)
	378	{
	379	}
	380
	381	#endif // wxUSE_GLCANVAS