src/mac/classic/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
/////////////////////////////////////////////////////////////////////////////

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

#include "wx/wxprec.h"

#if defined(__BORLANDC__)
#pragma hdrstop
#endif

#include "wx/setup.h"

#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->MacGetRootWindow()));

    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)
{
    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(MacGetRootWindow()) , &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 ( MacIsReallyShown() && !m_macCanvasIsShown )
        {
            m_macCanvasIsShown = true ;
            SetViewport() ;
        }
    }
    return TRUE ;
}

void wxGLCanvas::MacSuperShown( bool show )
{
    if ( !show )
    {
        if ( m_macCanvasIsShown )
        {
            m_macCanvasIsShown = false ;
            SetViewport() ;
        }
    }
    else
    {
        if ( MacIsReallyShown() && !m_macCanvasIsShown )
        {
            m_macCanvasIsShown = true ;
            SetViewport() ;
        }
    }

    wxWindow::MacSuperShown( show ) ;
}

//---------------------------------------------------------------------------
// 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	#ifdef __GNUG__
	13	#pragma implementation "glcanvas.h"
	14	#endif
	15
	16	#include "wx/wxprec.h"
	17
	18	#if defined(__BORLANDC__)
	19	#pragma hdrstop
	20	#endif
	21
	22	#include "wx/setup.h"
	23
	24	#if wxUSE_GLCANVAS
	25
	26	#ifndef WX_PRECOMP
	27	#include "wx/frame.h"
	28	#endif
	29
	30	#include "wx/settings.h"
	31	#include "wx/log.h"
	32
	33	#include "wx/glcanvas.h"
	34	#include "wx/mac/uma.h"
	35
	36	// DLL options compatibility check:
	37	#include "wx/build.h"
	38	WX_CHECK_BUILD_OPTIONS("wxGL")
	39
	40	/*
	41	* GLContext implementation
	42	*/
	43
	44	wxGLContext::wxGLContext(
	45	AGLPixelFormat fmt, wxGLCanvas *win,
	46	const wxPalette& palette,
	47	const wxGLContext other / for sharing display lists */
	48	)
	49	{
	50	m_window = win;
	51
	52	m_drawable = (AGLDrawable) UMAGetWindowPort(MAC_WXHWND(win->MacGetRootWindow()));
	53
	54	m_glContext = aglCreateContext(fmt, other ? other->m_glContext : NULL);
	55	wxCHECK_RET( m_glContext, wxT("Couldn't create OpenGl context") );
	56
	57	GLboolean b;
	58	b = aglSetDrawable(m_glContext, m_drawable);
	59	wxCHECK_RET( b, wxT("Couldn't bind OpenGl context") );
	60	aglEnable(m_glContext , AGL_BUFFER_RECT ) ;
	61	b = aglSetCurrentContext(m_glContext);
	62	wxCHECK_RET( b, wxT("Couldn't activate OpenGl context") );
	63	}
	64
	65	wxGLContext::~wxGLContext()
	66	{
	67	if (m_glContext)
	68	{
	69	aglSetCurrentContext(NULL);
	70	aglDestroyContext(m_glContext);
	71	}
	72	}
	73
	74	void wxGLContext::SwapBuffers()
	75	{
	76	if (m_glContext)
	77	{
	78	aglSwapBuffers(m_glContext);
	79	}
	80	}
	81
	82	void wxGLContext::SetCurrent()
	83	{
	84	if (m_glContext)
	85	{
	86	aglSetCurrentContext(m_glContext);
	87	}
	88	}
	89
	90	void wxGLContext::Update()
	91	{
	92	if (m_glContext)
	93	{
	94	aglUpdateContext(m_glContext);
	95	}
	96	}
	97
	98	void wxGLContext::SetColour(const wxChar *colour)
	99	{
	100	wxColour col = wxTheColourDatabase->Find(colour);
	101	if (col.Ok())
	102	{
	103	float r = (float)(col.Red()/256.0);
	104	float g = (float)(col.Green()/256.0);
	105	float b = (float)(col.Blue()/256.0);
	106	glColor3f( r, g, b);
	107	}
	108	}
	109
	110
	111	/*
	112	* wxGLCanvas implementation
	113	*/
	114
	115	IMPLEMENT_CLASS(wxGLCanvas, wxWindow)
	116
	117	BEGIN_EVENT_TABLE(wxGLCanvas, wxWindow)
	118	EVT_SIZE(wxGLCanvas::OnSize)
	119	END_EVENT_TABLE()
	120
	121	wxGLCanvas::wxGLCanvas(wxWindow *parent, wxWindowID id,
	122	const wxPoint& pos, const wxSize& size, long style, const wxString& name,
	123	int *attribList, const wxPalette& palette)
	124	{
	125	Create(parent, NULL, id, pos, size, style, name, attribList, palette);
	126	}
	127
	128	wxGLCanvas::wxGLCanvas( wxWindow *parent,
	129	const wxGLContext *shared, wxWindowID id,
	130	const wxPoint& pos, const wxSize& size, long style, const wxString& name,
	131	int *attribList, const wxPalette& palette )
	132	{
	133	Create(parent, shared, id, pos, size, style, name, attribList, palette);
	134	}
	135
	136	wxGLCanvas::wxGLCanvas( wxWindow parent, const wxGLCanvas shared, wxWindowID id,
	137	const wxPoint& pos, const wxSize& size, long style, const wxString& name,
	138	int *attribList, const wxPalette& palette )
	139	{
	140	Create(parent, shared ? shared->GetContext() : NULL, id, pos, size, style, name, attribList, palette);
	141	}
	142
	143	wxGLCanvas::~wxGLCanvas()
	144	{
	145	if (m_glContext != NULL) {
	146	delete m_glContext;
	147	m_glContext = NULL;
	148	}
	149	}
	150
	151	static AGLPixelFormat ChoosePixelFormat(const int *attribList)
	152	{
	153	GLint data[512];
	154	GLint defaultAttribs[] = { AGL_RGBA,
	155	AGL_DOUBLEBUFFER,
	156	AGL_MINIMUM_POLICY,
	157	AGL_DEPTH_SIZE, 1, // use largest available depth buffer
	158	AGL_RED_SIZE, 1,
	159	AGL_GREEN_SIZE, 1,
	160	AGL_BLUE_SIZE, 1,
	161	AGL_ALPHA_SIZE, 0,
	162	AGL_NONE };
	163	GLint *attribs;
	164	if (!attribList)
	165	{
	166	attribs = defaultAttribs;
	167	}
	168	else
	169	{
	170	int arg=0, p=0;
	171
	172	data[p++] = AGL_MINIMUM_POLICY; // make _SIZE tags behave more like GLX
	173	while( (attribList[arg]!=0) && (p<512) )
	174	{
	175	switch( attribList[arg++] )
	176	{
	177	case WX_GL_RGBA: data[p++] = AGL_RGBA; break;
	178	case WX_GL_BUFFER_SIZE:
	179	data[p++]=AGL_BUFFER_SIZE; data[p++]=attribList[arg++]; break;
	180	case WX_GL_LEVEL:
	181	data[p++]=AGL_LEVEL; data[p++]=attribList[arg++]; break;
	182	case WX_GL_DOUBLEBUFFER: data[p++] = AGL_DOUBLEBUFFER; break;
	183	case WX_GL_STEREO: data[p++] = AGL_STEREO; break;
	184	case WX_GL_AUX_BUFFERS:
	185	data[p++]=AGL_AUX_BUFFERS; data[p++]=attribList[arg++]; break;
	186	case WX_GL_MIN_RED:
	187	data[p++]=AGL_RED_SIZE; data[p++]=attribList[arg++]; break;
	188	case WX_GL_MIN_GREEN:
	189	data[p++]=AGL_GREEN_SIZE; data[p++]=attribList[arg++]; break;
	190	case WX_GL_MIN_BLUE:
	191	data[p++]=AGL_BLUE_SIZE; data[p++]=attribList[arg++]; break;
	192	case WX_GL_MIN_ALPHA:
	193	data[p++]=AGL_ALPHA_SIZE; data[p++]=attribList[arg++]; break;
	194	case WX_GL_DEPTH_SIZE:
	195	data[p++]=AGL_DEPTH_SIZE; data[p++]=attribList[arg++]; break;
	196	case WX_GL_STENCIL_SIZE:
	197	data[p++]=AGL_STENCIL_SIZE; data[p++]=attribList[arg++]; break;
	198	case WX_GL_MIN_ACCUM_RED:
	199	data[p++]=AGL_ACCUM_RED_SIZE; data[p++]=attribList[arg++]; break;
	200	case WX_GL_MIN_ACCUM_GREEN:
	201	data[p++]=AGL_ACCUM_GREEN_SIZE; data[p++]=attribList[arg++]; break;
	202	case WX_GL_MIN_ACCUM_BLUE:
	203	data[p++]=AGL_ACCUM_BLUE_SIZE; data[p++]=attribList[arg++]; break;
	204	case WX_GL_MIN_ACCUM_ALPHA:
	205	data[p++]=AGL_ACCUM_ALPHA_SIZE; data[p++]=attribList[arg++]; break;
	206	default:
	207	break;
	208	}
	209	}
	210	data[p] = 0;
	211
	212	attribs = data;
	213	}
	214
	215	return aglChoosePixelFormat(NULL, 0, attribs);
	216	}
	217
	218	bool wxGLCanvas::Create(wxWindow parent, const wxGLContext shared, wxWindowID id,
	219	const wxPoint& pos, const wxSize& size, long style, const wxString& name,
	220	int *attribList, const wxPalette& palette)
	221	{
	222	wxWindow::Create( parent, id, pos, size, style, name );
	223
	224	AGLPixelFormat fmt = ChoosePixelFormat(attribList);
	225	wxCHECK_MSG( fmt, false, wxT("Couldn't create OpenGl pixel format") );
	226
	227	m_glContext = new wxGLContext(fmt, this, palette, shared);
	228	m_macCanvasIsShown = true ;
	229	aglDestroyPixelFormat(fmt);
	230
	231	return true;
	232	}
	233
	234	void wxGLCanvas::SwapBuffers()
	235	{
	236	if (m_glContext)
	237	m_glContext->SwapBuffers();
	238	}
	239
	240	void wxGLCanvas::UpdateContext()
	241	{
	242	if (m_glContext)
	243	m_glContext->Update();
	244	}
	245
	246	void wxGLCanvas::SetViewport()
	247	{
	248	// viewport is initially set to entire port
	249	// adjust glViewport to just this window
	250	int x = 0 ;
	251	int y = 0 ;
	252
	253	wxWindow* iter = this ;
	254	while( iter->GetParent() )
	255	{
	256	iter = iter->GetParent() ;
	257	}
	258
	259	if ( iter && iter->IsTopLevel() )
	260	{
	261	MacClientToRootWindow( &x , &y ) ;
	262	int width, height;
	263	GetClientSize(& width, & height);
	264	Rect bounds ;
	265	GetWindowPortBounds( MAC_WXHWND(MacGetRootWindow()) , &bounds ) ;
	266	GLint parms[4] ;
	267	parms[0] = x ;
	268	parms[1] = bounds.bottom - bounds.top - ( y + height ) ;
	269	parms[2] = width ;
	270	parms[3] = height ;
	271
	272	if ( !m_macCanvasIsShown )
	273	parms[0] += 20000 ;
	274	aglSetInteger( m_glContext->m_glContext , AGL_BUFFER_RECT , parms ) ;
	275	}
	276	}
	277
	278	void wxGLCanvas::OnSize(wxSizeEvent& event)
	279	{
	280	MacUpdateView() ;
	281	}
	282
	283	void wxGLCanvas::MacUpdateView()
	284	{
	285	if (m_glContext)
	286	{
	287	UpdateContext();
	288	m_glContext->SetCurrent();
	289	SetViewport();
	290	}
	291	}
	292
	293	void wxGLCanvas::MacSuperChangedPosition()
	294	{
	295	MacUpdateView() ;
	296	wxWindow::MacSuperChangedPosition() ;
	297	}
	298
	299	void wxGLCanvas::MacTopLevelWindowChangedPosition()
	300	{
	301	MacUpdateView() ;
	302	wxWindow::MacTopLevelWindowChangedPosition() ;
	303	}
	304
	305	void wxGLCanvas::SetCurrent()
	306	{
	307	if (m_glContext)
	308	{
	309	m_glContext->SetCurrent();
	310	}
	311	}
	312
	313	void wxGLCanvas::SetColour(const wxChar *colour)
	314	{
	315	if (m_glContext)
	316	m_glContext->SetColour(colour);
	317	}
	318
	319	bool wxGLCanvas::Show(bool show)
	320	{
	321	if ( !wxWindow::Show( show ) )
	322	return FALSE ;
	323
	324	if ( !show )
	325	{
	326	if ( m_macCanvasIsShown )
	327	{
	328	m_macCanvasIsShown = false ;
	329	SetViewport() ;
	330	}
	331	}
	332	else
	333	{
	334	if ( MacIsReallyShown() && !m_macCanvasIsShown )
	335	{
	336	m_macCanvasIsShown = true ;
	337	SetViewport() ;
	338	}
	339	}
	340	return TRUE ;
	341	}
	342
	343	void wxGLCanvas::MacSuperShown( bool show )
	344	{
	345	if ( !show )
	346	{
	347	if ( m_macCanvasIsShown )
	348	{
	349	m_macCanvasIsShown = false ;
	350	SetViewport() ;
	351	}
	352	}
	353	else
	354	{
	355	if ( MacIsReallyShown() && !m_macCanvasIsShown )
	356	{
	357	m_macCanvasIsShown = true ;
	358	SetViewport() ;
	359	}
	360	}
	361
	362	wxWindow::MacSuperShown( show ) ;
	363	}
	364
	365	//---------------------------------------------------------------------------
	366	// wxGLApp
	367	//---------------------------------------------------------------------------
	368
	369	IMPLEMENT_CLASS(wxGLApp, wxApp)
	370
	371	bool wxGLApp::InitGLVisual(int *attribList)
	372	{
	373	AGLPixelFormat fmt = ChoosePixelFormat(attribList);
	374	if (fmt != NULL) {
	375	aglDestroyPixelFormat(fmt);
	376	return true;
	377	} else
	378	return false;
	379	}
	380
	381	wxGLApp::~wxGLApp(void)
	382	{
	383	}
	384
	385	#endif // wxUSE_GLCANVAS