src/mac/carbon/glcanvas.cpp

/////////////////////////////////////////////////////////////////////////////
// Name:        src/mac/carbon/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

#include "wx/glcanvas.h"

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

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