src/gtk1/glcanvas.cpp

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

#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
#pragma implementation "glcanvas.h"
#endif

// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"

#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"

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

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

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 )
{
    // VZ: apparently in some cases we're called twice -- no idea why,
    //     but a check doesn't hurt
    if ( !win->m_glContext )
    {
        wxGLContext *share = win->m_sharedContext;
        if ( !share && 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
//-----------------------------------------------------------------------------

#ifndef __WXGTK20__
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 );
}
#endif

//-----------------------------------------------------------------------------
// "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;

#ifdef __WXGTK20__
    gtk_widget_set_double_buffered( m_glWidget, FALSE );
#endif

    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 );

#ifndef __WXGTK20__
    gtk_signal_connect( GTK_OBJECT(m_wxwindow), "draw",
        GTK_SIGNAL_FUNC(gtk_glwindow_draw_callback), (gpointer)this );
#endif

    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 );
    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 wxWidgets 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	#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
	13	#pragma implementation "glcanvas.h"
	14	#endif
	15
	16	// For compilers that support precompilation, includes "wx.h".
	17	#include "wx/wxprec.h"
	18
	19	#include "wx/setup.h"
	20
	21	#if wxUSE_GLCANVAS
	22
	23	#include "wx/glcanvas.h"
	24
	25	#include "wx/frame.h"
	26	#include "wx/colour.h"
	27	#include "wx/module.h"
	28	#include "wx/app.h"
	29
	30	extern "C"
	31	{
	32	#include "gtk/gtk.h"
	33	#include "gdk/gdk.h"
	34	#include "gdk/gdkx.h"
	35	}
	36
	37	#include "wx/gtk/win_gtk.h"
	38
	39	// DLL options compatibility check:
	40	#include "wx/build.h"
	41	WX_CHECK_BUILD_OPTIONS("wxGL")
	42
	43	//---------------------------------------------------------------------------
	44	// global data
	45	//---------------------------------------------------------------------------
	46
	47	XVisualInfo g_vi = (XVisualInfo) NULL;
	48
	49	//-----------------------------------------------------------------------------
	50	// idle system
	51	//-----------------------------------------------------------------------------
	52
	53	extern void wxapp_install_idle_handler();
	54	extern bool g_isIdle;
	55
	56	//---------------------------------------------------------------------------
	57	// wxGLContext
	58	//---------------------------------------------------------------------------
	59
	60	IMPLEMENT_CLASS(wxGLContext,wxObject)
	61
	62	wxGLContext::wxGLContext( bool WXUNUSED(isRGB), wxWindow *win, const wxPalette& WXUNUSED(palette) )
	63	{
	64	m_window = win;
	65	m_widget = win->m_wxwindow;
	66
	67	wxGLCanvas gc = (wxGLCanvas) win;
	68	XVisualInfo vi = (XVisualInfo ) gc->m_vi;
	69
	70	wxCHECK_RET( vi, _T("invalid visual for OpenGl") );
	71
	72	m_glContext = glXCreateContext( GDK_DISPLAY(), vi, None, GL_TRUE );
	73
	74	wxCHECK_RET( m_glContext, _T("Couldn't create OpenGl context") );
	75	}
	76
	77	wxGLContext::wxGLContext(
	78	bool WXUNUSED(isRGB), wxWindow *win,
	79	const wxPalette& WXUNUSED(palette),
	80	const wxGLContext other / for sharing display lists */
	81	)
	82	{
	83	m_window = win;
	84	m_widget = win->m_wxwindow;
	85
	86	wxGLCanvas gc = (wxGLCanvas) win;
	87	XVisualInfo vi = (XVisualInfo ) gc->m_vi;
	88
	89	wxCHECK_RET( vi, _T("invalid visual for OpenGl") );
	90
	91	m_glContext = glXCreateContext( GDK_DISPLAY(), vi,
	92	other ? other->m_glContext : None,
	93	GL_TRUE );
	94
	95	if ( !m_glContext )
	96	{
	97	wxFAIL_MSG( _T("Couldn't create OpenGl context") );
	98	}
	99	}
	100
	101	wxGLContext::~wxGLContext()
	102	{
	103	if (!m_glContext) return;
	104
	105	if (m_glContext == glXGetCurrentContext())
	106	{
	107	glXMakeCurrent( GDK_DISPLAY(), None, NULL);
	108	}
	109
	110	glXDestroyContext( GDK_DISPLAY(), m_glContext );
	111	}
	112
	113	void wxGLContext::SwapBuffers()
	114	{
	115	if (m_glContext)
	116	{
	117	GdkWindow *window = GTK_PIZZA(m_widget)->bin_window;
	118	glXSwapBuffers( GDK_DISPLAY(), GDK_WINDOW_XWINDOW( window ) );
	119	}
	120	}
	121
	122	void wxGLContext::SetCurrent()
	123	{
	124	if (m_glContext)
	125	{
	126	GdkWindow *window = GTK_PIZZA(m_widget)->bin_window;
	127	glXMakeCurrent( GDK_DISPLAY(), GDK_WINDOW_XWINDOW(window), m_glContext );
	128	}
	129	}
	130
	131	void wxGLContext::SetColour(const wxChar *colour)
	132	{
	133	wxColour col = wxTheColourDatabase->Find(colour);
	134	if (col.Ok())
	135	{
	136	float r = (float)(col.Red()/256.0);
	137	float g = (float)(col.Green()/256.0);
	138	float b = (float)(col.Blue()/256.0);
	139	glColor3f( r, g, b);
	140	}
	141	}
	142
	143	void wxGLContext::SetupPixelFormat()
	144	{
	145	}
	146
	147	void wxGLContext::SetupPalette( const wxPalette& WXUNUSED(palette) )
	148	{
	149	}
	150
	151	wxPalette wxGLContext::CreateDefaultPalette()
	152	{
	153	return wxNullPalette;
	154	}
	155
	156	//-----------------------------------------------------------------------------
	157	// "realize" from m_wxwindow
	158	//-----------------------------------------------------------------------------
	159
	160	static gint
	161	gtk_glwindow_realized_callback( GtkWidget * WXUNUSED(widget), wxGLCanvas *win )
	162	{
	163	// VZ: apparently in some cases we're called twice -- no idea why,
	164	// but a check doesn't hurt
	165	if ( !win->m_glContext )
	166	{
	167	wxGLContext *share = win->m_sharedContext;
	168	if ( !share && win->m_sharedContextOf )
	169	share = win->m_sharedContextOf->GetContext();
	170
	171	win->m_glContext = new wxGLContext( TRUE, win, wxNullPalette, share );
	172	}
	173
	174	return FALSE;
	175	}
	176
	177	//-----------------------------------------------------------------------------
	178	// "map" from m_wxwindow
	179	//-----------------------------------------------------------------------------
	180
	181	static gint
	182	gtk_glwindow_map_callback( GtkWidget * WXUNUSED(widget), wxGLCanvas *win )
	183	{
	184	if (win->m_glContext/* && win->m_exposed*/)
	185	{
	186	wxPaintEvent event( win->GetId() );
	187	event.SetEventObject( win );
	188	win->GetEventHandler()->ProcessEvent( event );
	189
	190	win->m_exposed = FALSE;
	191	win->GetUpdateRegion().Clear();
	192	}
	193
	194	return FALSE;
	195	}
	196
	197	//-----------------------------------------------------------------------------
	198	// "expose_event" of m_wxwindow
	199	//-----------------------------------------------------------------------------
	200
	201	static void
	202	gtk_glwindow_expose_callback( GtkWidget WXUNUSED(widget), GdkEventExpose gdk_event, wxGLCanvas *win )
	203	{
	204	if (g_isIdle)
	205	wxapp_install_idle_handler();
	206
	207	win->m_exposed = TRUE;
	208
	209	win->GetUpdateRegion().Union( gdk_event->area.x,
	210	gdk_event->area.y,
	211	gdk_event->area.width,
	212	gdk_event->area.height );
	213	}
	214
	215	//-----------------------------------------------------------------------------
	216	// "draw" of m_wxwindow
	217	//-----------------------------------------------------------------------------
	218
	219	#ifndef __WXGTK20__
	220	static void
	221	gtk_glwindow_draw_callback( GtkWidget WXUNUSED(widget), GdkRectangle rect, wxGLCanvas *win )
	222	{
	223	if (g_isIdle)
	224	wxapp_install_idle_handler();
	225
	226	win->m_exposed = TRUE;
	227
	228	win->GetUpdateRegion().Union( rect->x, rect->y,
	229	rect->width, rect->height );
	230	}
	231	#endif
	232
	233	//-----------------------------------------------------------------------------
	234	// "size_allocate" of m_wxwindow
	235	//-----------------------------------------------------------------------------
	236
	237	static void
	238	gtk_glcanvas_size_callback( GtkWidget WXUNUSED(widget), GtkAllocation alloc, wxGLCanvas *win )
	239	{
	240	if (g_isIdle)
	241	wxapp_install_idle_handler();
	242
	243	if (!win->m_hasVMT)
	244	return;
	245
	246	wxSizeEvent event( wxSize(win->m_width,win->m_height), win->GetId() );
	247	event.SetEventObject( win );
	248	win->GetEventHandler()->ProcessEvent( event );
	249	}
	250
	251	//---------------------------------------------------------------------------
	252	// wxGlCanvas
	253	//---------------------------------------------------------------------------
	254
	255	IMPLEMENT_CLASS(wxGLCanvas, wxWindow)
	256
	257	BEGIN_EVENT_TABLE(wxGLCanvas, wxWindow)
	258	EVT_SIZE(wxGLCanvas::OnSize)
	259	END_EVENT_TABLE()
	260
	261	wxGLCanvas::wxGLCanvas( wxWindow *parent, wxWindowID id,
	262	const wxPoint& pos, const wxSize& size,
	263	long style, const wxString& name,
	264	int *attribList,
	265	const wxPalette& palette )
	266	{
	267	Create( parent, NULL, NULL, id, pos, size, style, name, attribList, palette );
	268	}
	269
	270	wxGLCanvas::wxGLCanvas( wxWindow *parent,
	271	const wxGLContext *shared,
	272	wxWindowID id,
	273	const wxPoint& pos, const wxSize& size,
	274	long style, const wxString& name,
	275	int *attribList,
	276	const wxPalette& palette )
	277	{
	278	Create( parent, shared, NULL, id, pos, size, style, name, attribList, palette );
	279	}
	280
	281	wxGLCanvas::wxGLCanvas( wxWindow *parent,
	282	const wxGLCanvas *shared,
	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	Create( parent, NULL, shared, id, pos, size, style, name, attribList, palette );
	290	}
	291
	292	bool wxGLCanvas::Create( wxWindow *parent,
	293	const wxGLContext *shared,
	294	const wxGLCanvas *shared_context_of,
	295	wxWindowID id,
	296	const wxPoint& pos, const wxSize& size,
	297	long style, const wxString& name,
	298	int *attribList,
	299	const wxPalette& palette)
	300	{
	301	m_sharedContext = (wxGLContext*)shared; // const_cast
	302	m_sharedContextOf = (wxGLCanvas*)shared_context_of; // const_cast
	303	m_glContext = (wxGLContext*) NULL;
	304
	305	m_exposed = FALSE;
	306	m_noExpose = TRUE;
	307	m_nativeSizeEvent = TRUE;
	308
	309	XVisualInfo *vi = NULL;
	310	if (wxTheApp->m_glVisualInfo != NULL)
	311	{
	312	vi = (XVisualInfo *) wxTheApp->m_glVisualInfo;
	313	m_canFreeVi = FALSE; // owned by wxTheApp - don't free upon destruction
	314	}
	315	else
	316	{
	317	vi = (XVisualInfo *) ChooseGLVisual(attribList);
	318	m_canFreeVi = TRUE;
	319	}
	320	m_vi = vi; // save for later use
	321
	322	wxCHECK_MSG( m_vi, FALSE, _T("required visual couldn't be found") );
	323
	324	GdkVisual *visual = gdkx_visual_get( vi->visualid );
	325	GdkColormap *colormap = gdk_colormap_new( gdkx_visual_get(vi->visualid), TRUE );
	326
	327	gtk_widget_push_colormap( colormap );
	328	gtk_widget_push_visual( visual );
	329
	330	wxWindow::Create( parent, id, pos, size, style, name );
	331
	332	m_glWidget = m_wxwindow;
	333
	334	#ifdef __WXGTK20__
	335	gtk_widget_set_double_buffered( m_glWidget, FALSE );
	336	#endif
	337
	338	gtk_pizza_set_clear( GTK_PIZZA(m_wxwindow), FALSE );
	339
	340	gtk_signal_connect( GTK_OBJECT(m_wxwindow), "realize",
	341	GTK_SIGNAL_FUNC(gtk_glwindow_realized_callback), (gpointer) this );
	342
	343	gtk_signal_connect( GTK_OBJECT(m_wxwindow), "map",
	344	GTK_SIGNAL_FUNC(gtk_glwindow_map_callback), (gpointer) this );
	345
	346	gtk_signal_connect( GTK_OBJECT(m_wxwindow), "expose_event",
	347	GTK_SIGNAL_FUNC(gtk_glwindow_expose_callback), (gpointer)this );
	348
	349	#ifndef __WXGTK20__
	350	gtk_signal_connect( GTK_OBJECT(m_wxwindow), "draw",
	351	GTK_SIGNAL_FUNC(gtk_glwindow_draw_callback), (gpointer)this );
	352	#endif
	353
	354	gtk_signal_connect( GTK_OBJECT(m_widget), "size_allocate",
	355	GTK_SIGNAL_FUNC(gtk_glcanvas_size_callback), (gpointer)this );
	356
	357	gtk_widget_pop_visual();
	358	gtk_widget_pop_colormap();
	359
	360	if (GTK_WIDGET_REALIZED(m_wxwindow))
	361	gtk_glwindow_realized_callback( m_wxwindow, this );
	362
	363	if (GTK_WIDGET_MAPPED(m_wxwindow))
	364	gtk_glwindow_map_callback( m_wxwindow, this );
	365
	366	return TRUE;
	367	}
	368
	369	wxGLCanvas::~wxGLCanvas()
	370	{
	371	XVisualInfo vi = (XVisualInfo ) m_vi;
	372
	373	if (vi && m_canFreeVi) XFree( vi );
	374	delete m_glContext;
	375	}
	376
	377	void* wxGLCanvas::ChooseGLVisual(int *attribList)
	378	{
	379	int data[512];
	380	if (!attribList)
	381	{
	382	// default settings if attriblist = 0
	383	data[0] = GLX_RGBA;
	384	data[1] = GLX_DOUBLEBUFFER;
	385	data[2] = GLX_DEPTH_SIZE; data[3] = 1;
	386	data[4] = GLX_RED_SIZE; data[5] = 1;
	387	data[6] = GLX_GREEN_SIZE; data[7] = 1;
	388	data[8] = GLX_BLUE_SIZE; data[9] = 1;
	389	data[10] = GLX_ALPHA_SIZE; data[11] = 0;
	390	data[12] = None;
	391
	392	attribList = (int*) data;
	393	}
	394	else
	395	{
	396	int arg=0, p=0;
	397
	398	while( (attribList[arg]!=0) && (p<510) )
	399	{
	400	switch( attribList[arg++] )
	401	{
	402	case WX_GL_RGBA: data[p++] = GLX_RGBA; break;
	403	case WX_GL_BUFFER_SIZE:
	404	data[p++]=GLX_BUFFER_SIZE; data[p++]=attribList[arg++]; break;
	405	case WX_GL_LEVEL:
	406	data[p++]=GLX_LEVEL; data[p++]=attribList[arg++]; break;
	407	case WX_GL_DOUBLEBUFFER: data[p++] = GLX_DOUBLEBUFFER; break;
	408	case WX_GL_STEREO: data[p++] = GLX_STEREO; break;
	409	case WX_GL_AUX_BUFFERS:
	410	data[p++]=GLX_AUX_BUFFERS; data[p++]=attribList[arg++]; break;
	411	case WX_GL_MIN_RED:
	412	data[p++]=GLX_RED_SIZE; data[p++]=attribList[arg++]; break;
	413	case WX_GL_MIN_GREEN:
	414	data[p++]=GLX_GREEN_SIZE; data[p++]=attribList[arg++]; break;
	415	case WX_GL_MIN_BLUE:
	416	data[p++]=GLX_BLUE_SIZE; data[p++]=attribList[arg++]; break;
	417	case WX_GL_MIN_ALPHA:
	418	data[p++]=GLX_ALPHA_SIZE; data[p++]=attribList[arg++]; break;
	419	case WX_GL_DEPTH_SIZE:
	420	data[p++]=GLX_DEPTH_SIZE; data[p++]=attribList[arg++]; break;
	421	case WX_GL_STENCIL_SIZE:
	422	data[p++]=GLX_STENCIL_SIZE; data[p++]=attribList[arg++]; break;
	423	case WX_GL_MIN_ACCUM_RED:
	424	data[p++]=GLX_ACCUM_RED_SIZE; data[p++]=attribList[arg++]; break;
	425	case WX_GL_MIN_ACCUM_GREEN:
	426	data[p++]=GLX_ACCUM_GREEN_SIZE; data[p++]=attribList[arg++]; break;
	427	case WX_GL_MIN_ACCUM_BLUE:
	428	data[p++]=GLX_ACCUM_BLUE_SIZE; data[p++]=attribList[arg++]; break;
	429	case WX_GL_MIN_ACCUM_ALPHA:
	430	data[p++]=GLX_ACCUM_ALPHA_SIZE; data[p++]=attribList[arg++]; break;
	431	default:
	432	break;
	433	}
	434	}
	435	data[p] = 0;
	436
	437	attribList = (int*) data;
	438	}
	439
	440
	441	Display *dpy = GDK_DISPLAY();
	442
	443	return glXChooseVisual( dpy, DefaultScreen(dpy), attribList );
	444	}
	445
	446	void wxGLCanvas::SwapBuffers()
	447	{
	448	if (m_glContext)
	449	m_glContext->SwapBuffers();
	450	}
	451
	452	void wxGLCanvas::OnSize(wxSizeEvent& WXUNUSED(event))
	453	{
	454	}
	455
	456	void wxGLCanvas::SetCurrent()
	457	{
	458	if (m_glContext)
	459	m_glContext->SetCurrent();
	460	}
	461
	462	void wxGLCanvas::SetColour( const wxChar *colour )
	463	{
	464	if (m_glContext)
	465	m_glContext->SetColour( colour );
	466	}
	467
	468	void wxGLCanvas::OnInternalIdle()
	469	{
	470	if (m_glContext && m_exposed)
	471	{
	472	wxPaintEvent event( GetId() );
	473	event.SetEventObject( this );
	474	GetEventHandler()->ProcessEvent( event );
	475
	476	m_exposed = FALSE;
	477	GetUpdateRegion().Clear();
	478	}
	479
	480	wxWindow::OnInternalIdle();
	481	}
	482
	483
	484
	485	//---------------------------------------------------------------------------
	486	// wxGLApp
	487	//---------------------------------------------------------------------------
	488
	489	IMPLEMENT_CLASS(wxGLApp, wxApp)
	490
	491	wxGLApp::~wxGLApp()
	492	{
	493	if (m_glVisualInfo)
	494	XFree(m_glVisualInfo);
	495	}
	496
	497	bool wxGLApp::InitGLVisual(int *attribList)
	498	{
	499	if (m_glVisualInfo)
	500	XFree(m_glVisualInfo);
	501
	502	m_glVisualInfo = wxGLCanvas::ChooseGLVisual(attribList);
	503
	504	return m_glVisualInfo != NULL;
	505	}
	506
	507	#endif
	508	// wxUSE_GLCANVAS
	509