src/gtk/glcanvas.cpp

/////////////////////////////////////////////////////////////////////////////
// Name:        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, "invalid visual for OpenGl" );

    m_glContext = glXCreateContext( GDK_DISPLAY(), vi, None, GL_TRUE );

    wxCHECK_RET( m_glContext, "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, "invalid visual for OpenGl" );

    if( other != 0 )
        m_glContext = glXCreateContext( GDK_DISPLAY(), vi, other->m_glContext, GL_TRUE );
    else
        m_glContext = glXCreateContext( GDK_DISPLAY(), vi, None, GL_TRUE );

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