[wxWidgets.git] / utils / glcanvas / 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 "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, wxScrolledWindow)

BEGIN_EVENT_TABLE(wxGLCanvas, wxScrolledWindow)
    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;
    
    if (!attribList)
    {
        int data[] = { GLX_RGBA, 
	               GLX_DOUBLEBUFFER, 
		       GLX_DEPTH_SIZE, 1,  // use largest available depth buffer
		       GLX_RED_SIZE, 1, 
		       GLX_GREEN_SIZE, 1, 
		       GLX_BLUE_SIZE, 1, 
		       GLX_ALPHA_SIZE, 0, 
		       None };
	attribList = (int*) data;
    }
    else
    {
      int data[512], arg=0, p=0;
       
      while( (attribList[arg]!=0) && (p<512) )
      {
        switch( attribList[arg++] )
        {
          case WX_GL_RGBA: data[p++] = GLX_RGBA; break;
          case WX_GL_DOUBLEBUFFER: data[p++] = GLX_DOUBLEBUFFER; break;
          case WX_GL_DEPTH_SIZE: 
            data[p++]=GLX_DEPTH_SIZE; 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;
          default:
            break;
        }
      }       
      data[p] = 0; 

      attribList = (int*) data;
    }
    
    
    Display *dpy = GDK_DISPLAY();
    
    XVisualInfo *vi = glXChooseVisual( dpy, DefaultScreen(dpy), attribList );
    
    m_vi = vi;  // safe 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 );

    wxScrolledWindow::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();
    
    return TRUE;
}

wxGLCanvas::~wxGLCanvas()
{
    XVisualInfo *vi = (XVisualInfo *) m_vi;
    
    if (vi) XFree( vi );
    if (m_glContext) delete m_glContext;
}

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

void wxGLCanvas::OnSize(wxSizeEvent& WXUNUSED(event))
{
    int width, height;
    GetClientSize( &width, &height );
    
    if (m_glContext && GTK_WIDGET_REALIZED(m_glWidget) )
    {
        SetCurrent(); 
	
        glViewport(0, 0, (GLint)width, (GLint)height );
        glMatrixMode(GL_PROJECTION);
        glLoadIdentity();
        glFrustum( -1.0, 1.0, -1.0, 1.0, 5.0, 15.0 );
        glMatrixMode(GL_MODELVIEW);
    }
}

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();
}
Commit	Line	Data
9d3221ab RR	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
bbe0af5b	16	#include "glcanvas.h"
9d3221ab RR	17
	18	#include "wx/frame.h"
	19	#include "wx/colour.h"
bbe0af5b RR	20	#include "wx/module.h"
	21	#include "wx/app.h"
	22
aae24d21	23	extern "C" {
bbe0af5b RR	24	#include "gtk/gtk.h"
bbe0af5b RR	25	#include "gdk/gdk.h"
bbe0af5b RR	26	#include "gdk/gdkx.h"
	27	}
	28
aae24d21 RR	29	#include "wx/gtk/win_gtk.h"
aae24d21 RR	30
bbe0af5b	31	//---------------------------------------------------------------------------
aae24d21	32	// global data
bbe0af5b RR	33	//---------------------------------------------------------------------------
bbe0af5b RR	34
aae24d21	35	XVisualInfo g_vi = (XVisualInfo) NULL;
9d3221ab	36
54517652 RR	37	//-----------------------------------------------------------------------------
	38	// idle system
	39	//-----------------------------------------------------------------------------
	40
	41	extern void wxapp_install_idle_handler();
	42	extern bool g_isIdle;
	43
9d3221ab RR	44	//---------------------------------------------------------------------------
	45	// wxGLContext
	46	//---------------------------------------------------------------------------
	47
	48	IMPLEMENT_CLASS(wxGLContext,wxObject)
	49
	50	wxGLContext::wxGLContext( bool WXUNUSED(isRGB), wxWindow *win, const wxPalette& WXUNUSED(palette) )
	51	{
bbe0af5b	52	m_window = win;
4b59bea3 RR	53	m_widget = win->m_wxwindow;
	54
	55	wxGLCanvas gc = (wxGLCanvas) win;
	56	XVisualInfo vi = (XVisualInfo ) gc->m_vi;
	57
	58	wxCHECK_RET( vi, "invalid visual for OpenGl" );
bbe0af5b	59
4b59bea3	60	m_glContext = glXCreateContext( GDK_DISPLAY(), vi, None, GL_TRUE );
9d3221ab	61
aae24d21	62	wxCHECK_RET( m_glContext, "Couldn't create OpenGl context" );
9d3221ab RR	63	}
9d3221ab RR	64
089e55d6 RR	65	wxGLContext::wxGLContext(
	66	bool WXUNUSED(isRGB), wxWindow *win,
	67	const wxPalette& WXUNUSED(palette),
	68	const wxGLContext other / for sharing display lists */
	69	)
	70	{
	71	m_window = win;
4b59bea3 RR	72	m_widget = win->m_wxwindow;
	73
	74	wxGLCanvas gc = (wxGLCanvas) win;
	75	XVisualInfo vi = (XVisualInfo ) gc->m_vi;
	76
	77	wxCHECK_RET( vi, "invalid visual for OpenGl" );
089e55d6 RR	78
089e55d6 RR	79	if( other != 0 )
4b59bea3	80	m_glContext = glXCreateContext( GDK_DISPLAY(), vi, other->m_glContext, GL_TRUE );
089e55d6	81	else
4b59bea3	82	m_glContext = glXCreateContext( GDK_DISPLAY(), vi, None, GL_TRUE );
089e55d6 RR	83
	84	wxCHECK_RET( m_glContext, "Couldn't create OpenGl context" );
	85	}
	86
9d3221ab RR	87	wxGLContext::~wxGLContext()
9d3221ab RR	88	{
aae24d21	89	if (!m_glContext) return;
9d3221ab	90
aae24d21 RR	91	if (m_glContext == glXGetCurrentContext())
	92	{
	93	glXMakeCurrent( GDK_DISPLAY(), None, NULL);
bbe0af5b	94	}
aae24d21 RR	95
aae24d21 RR	96	glXDestroyContext( GDK_DISPLAY(), m_glContext );
9d3221ab RR	97	}
	98
	99	void wxGLContext::SwapBuffers()
	100	{
bbe0af5b RR	101	if (m_glContext)
bbe0af5b RR	102	{
da048e3d	103	GdkWindow *window = GTK_PIZZA(m_widget)->bin_window;
147bc491	104	glXSwapBuffers( GDK_DISPLAY(), GDK_WINDOW_XWINDOW( window ) );
bbe0af5b	105	}
9d3221ab RR	106	}
	107
	108	void wxGLContext::SetCurrent()
	109	{
bbe0af5b RR	110	if (m_glContext)
bbe0af5b RR	111	{
da048e3d	112	GdkWindow *window = GTK_PIZZA(m_widget)->bin_window;
147bc491	113	glXMakeCurrent( GDK_DISPLAY(), GDK_WINDOW_XWINDOW(window), m_glContext );
bbe0af5b	114	}
9d3221ab RR	115	}
	116
	117	void wxGLContext::SetColour(const char *colour)
	118	{
bbe0af5b RR	119	float r = 0.0;
	120	float g = 0.0;
	121	float b = 0.0;
	122	wxColour *col = wxTheColourDatabase->FindColour(colour);
	123	if (col)
	124	{
	125	r = (float)(col->Red()/256.0);
	126	g = (float)(col->Green()/256.0);
	127	b = (float)(col->Blue()/256.0);
	128	glColor3f( r, g, b);
	129	}
9d3221ab RR	130	}
	131
	132	void wxGLContext::SetupPixelFormat()
	133	{
	134	}
	135
	136	void wxGLContext::SetupPalette( const wxPalette& WXUNUSED(palette) )
	137	{
	138	}
	139
	140	wxPalette wxGLContext::CreateDefaultPalette()
	141	{
bbe0af5b	142	return wxNullPalette;
9d3221ab RR	143	}
9d3221ab RR	144
1d61ebac RR	145	//-----------------------------------------------------------------------------
	146	// "realize" from m_wxwindow
	147	//-----------------------------------------------------------------------------
	148
	149	static gint
	150	gtk_glwindow_realized_callback( GtkWidget * WXUNUSED(widget), wxGLCanvas *win )
	151	{
b8167e73 SB	152	wxGLContext *share= win->m_sharedContext;
	153	if (share==NULL && win->m_sharedContextOf) share=win->m_sharedContextOf->GetContext();
	154
	155	win->m_glContext = new wxGLContext( TRUE, win, wxNullPalette, share );
1d61ebac RR	156
	157	return FALSE;
	158	}
	159
7941ba11 RR	160	//-----------------------------------------------------------------------------
	161	// "map" from m_wxwindow
	162	//-----------------------------------------------------------------------------
	163
	164	static gint
	165	gtk_glwindow_map_callback( GtkWidget * WXUNUSED(widget), wxGLCanvas *win )
	166	{
	167	if (win->m_glContext/* && win->m_exposed*/)
	168	{
	169	wxPaintEvent event( win->GetId() );
	170	event.SetEventObject( win );
	171	win->GetEventHandler()->ProcessEvent( event );
	172
	173	win->m_exposed = FALSE;
	174	win->GetUpdateRegion().Clear();
	175	}
	176
	177	return FALSE;
	178	}
	179
147bc491 RR	180	//-----------------------------------------------------------------------------
	181	// "expose_event" of m_wxwindow
	182	//-----------------------------------------------------------------------------
	183
	184	static void
	185	gtk_glwindow_expose_callback( GtkWidget WXUNUSED(widget), GdkEventExpose gdk_event, wxGLCanvas *win )
	186	{
54517652 RR	187	if (g_isIdle)
	188	wxapp_install_idle_handler();
	189
147bc491 RR	190	win->m_exposed = TRUE;
	191
	192	win->GetUpdateRegion().Union( gdk_event->area.x,
	193	gdk_event->area.y,
	194	gdk_event->area.width,
	195	gdk_event->area.height );
	196	}
	197
	198	//-----------------------------------------------------------------------------
	199	// "draw" of m_wxwindow
	200	//-----------------------------------------------------------------------------
	201
	202	static void
	203	gtk_glwindow_draw_callback( GtkWidget WXUNUSED(widget), GdkRectangle rect, wxGLCanvas *win )
	204	{
54517652 RR	205	if (g_isIdle)
	206	wxapp_install_idle_handler();
	207
147bc491 RR	208	win->m_exposed = TRUE;
	209
	210	win->GetUpdateRegion().Union( rect->x, rect->y,
	211	rect->width, rect->height );
	212	}
	213
30760ce7 RR	214	//-----------------------------------------------------------------------------
	215	// "size_allocate" of m_wxwindow
	216	//-----------------------------------------------------------------------------
	217
	218	static void
	219	gtk_glcanvas_size_callback( GtkWidget WXUNUSED(widget), GtkAllocation alloc, wxGLCanvas *win )
	220	{
	221	if (g_isIdle)
	222	wxapp_install_idle_handler();
	223
	224	if (!win->m_hasVMT)
	225	return;
	226
	227	wxSizeEvent event( wxSize(win->m_width,win->m_height), win->GetId() );
	228	event.SetEventObject( win );
	229	win->GetEventHandler()->ProcessEvent( event );
	230	}
	231
9d3221ab RR	232	//---------------------------------------------------------------------------
	233	// wxGlCanvas
	234	//---------------------------------------------------------------------------
	235
	236	IMPLEMENT_CLASS(wxGLCanvas, wxScrolledWindow)
	237
	238	BEGIN_EVENT_TABLE(wxGLCanvas, wxScrolledWindow)
	239	EVT_SIZE(wxGLCanvas::OnSize)
	240	END_EVENT_TABLE()
	241
aae24d21 RR	242	wxGLCanvas::wxGLCanvas( wxWindow *parent, wxWindowID id,
	243	const wxPoint& pos, const wxSize& size,
	244	long style, const wxString& name,
	245	int *attribList,
	246	const wxPalette& palette )
	247	{
b8167e73	248	Create( parent, NULL, NULL, id, pos, size, style, name, attribList, palette );
089e55d6 RR	249	}
	250
	251	wxGLCanvas::wxGLCanvas( wxWindow *parent,
	252	const wxGLContext *shared,
	253	wxWindowID id,
	254	const wxPoint& pos, const wxSize& size,
	255	long style, const wxString& name,
	256	int *attribList,
	257	const wxPalette& palette )
	258	{
b8167e73 SB	259	Create( parent, shared, NULL, id, pos, size, style, name, attribList, palette );
	260	}
	261
	262	wxGLCanvas::wxGLCanvas( wxWindow *parent,
	263	const wxGLCanvas *shared,
	264	wxWindowID id,
	265	const wxPoint& pos, const wxSize& size,
	266	long style, const wxString& name,
	267	int *attribList,
	268	const wxPalette& palette )
	269	{
	270	Create( parent, NULL, shared, id, pos, size, style, name, attribList, palette );
aae24d21 RR	271	}
aae24d21 RR	272
089e55d6 RR	273	bool wxGLCanvas::Create( wxWindow *parent,
089e55d6 RR	274	const wxGLContext *shared,
b8167e73	275	const wxGLCanvas *shared_context_of,
089e55d6	276	wxWindowID id,
aae24d21 RR	277	const wxPoint& pos, const wxSize& size,
	278	long style, const wxString& name,
	279	int *attribList,
089e55d6	280	const wxPalette& palette)
9d3221ab	281	{
147bc491	282	m_sharedContext = (wxGLContext*)shared; // const_cast
b8167e73	283	m_sharedContextOf = (wxGLCanvas*)shared_context_of; // const_cast
4b59bea3	284	m_glContext = (wxGLContext*) NULL;
147bc491 RR	285
	286	m_exposed = FALSE;
	287	m_noExpose = TRUE;
30760ce7	288	m_nativeSizeEvent = TRUE;
1d61ebac	289
aae24d21 RR	290	if (!attribList)
	291	{
	292	int data[] = { GLX_RGBA,
	293	GLX_DOUBLEBUFFER,
1d61ebac	294	GLX_DEPTH_SIZE, 1, // use largest available depth buffer
a533f5c1 RR	295	GLX_RED_SIZE, 1,
	296	GLX_GREEN_SIZE, 1,
	297	GLX_BLUE_SIZE, 1,
265b4577	298	GLX_ALPHA_SIZE, 0,
aae24d21 RR	299	None };
aae24d21 RR	300	attribList = (int*) data;
089e55d6 RR	301	}
	302	else
	303	{
	304	int data[512], arg=0, p=0;
	305
	306	while( (attribList[arg]!=0) && (p<512) )
	307	{
	308	switch( attribList[arg++] )
	309	{
	310	case WX_GL_RGBA: data[p++] = GLX_RGBA; break;
	311	case WX_GL_DOUBLEBUFFER: data[p++] = GLX_DOUBLEBUFFER; break;
	312	case WX_GL_DEPTH_SIZE:
	313	data[p++]=GLX_DEPTH_SIZE; data[p++]=attribList[arg++]; break;
	314	case WX_GL_MIN_RED:
	315	data[p++]=GLX_RED_SIZE; data[p++]=attribList[arg++]; break;
	316	case WX_GL_MIN_GREEN:
	317	data[p++]=GLX_GREEN_SIZE; data[p++]=attribList[arg++]; break;
	318	case WX_GL_MIN_BLUE:
	319	data[p++]=GLX_BLUE_SIZE; data[p++]=attribList[arg++]; break;
	320	default:
	321	break;
	322	}
	323	}
	324	data[p] = 0;
	325
	326	attribList = (int*) data;
aae24d21 RR	327	}
aae24d21 RR	328
e8b04eb3	329
aae24d21 RR	330	Display *dpy = GDK_DISPLAY();
aae24d21 RR	331
4b59bea3 RR	332	XVisualInfo *vi = glXChooseVisual( dpy, DefaultScreen(dpy), attribList );
	333
	334	m_vi = vi; // safe for later use
aae24d21	335
4b59bea3	336	wxCHECK_MSG( m_vi, FALSE, "required visual couldn't be found" );
a20cd16c	337
4b59bea3 RR	338	GdkVisual *visual = gdkx_visual_get( vi->visualid );
4b59bea3 RR	339	GdkColormap *colormap = gdk_colormap_new( gdkx_visual_get(vi->visualid), TRUE );
aae24d21 RR	340
	341	gtk_widget_push_colormap( colormap );
	342	gtk_widget_push_visual( visual );
1d61ebac RR	343
	344	wxScrolledWindow::Create( parent, id, pos, size, style, name );
	345
	346	m_glWidget = m_wxwindow;
aae24d21	347
da048e3d	348	gtk_pizza_set_clear( GTK_PIZZA(m_wxwindow), FALSE );
147bc491 RR	349
147bc491 RR	350	gtk_signal_connect( GTK_OBJECT(m_wxwindow), "realize",
1d61ebac	351	GTK_SIGNAL_FUNC(gtk_glwindow_realized_callback), (gpointer) this );
147bc491	352
7941ba11 RR	353	gtk_signal_connect( GTK_OBJECT(m_wxwindow), "map",
	354	GTK_SIGNAL_FUNC(gtk_glwindow_map_callback), (gpointer) this );
	355
147bc491 RR	356	gtk_signal_connect( GTK_OBJECT(m_wxwindow), "expose_event",
	357	GTK_SIGNAL_FUNC(gtk_glwindow_expose_callback), (gpointer)this );
	358
	359	gtk_signal_connect( GTK_OBJECT(m_wxwindow), "draw",
	360	GTK_SIGNAL_FUNC(gtk_glwindow_draw_callback), (gpointer)this );
	361
30760ce7 RR	362	gtk_signal_connect( GTK_OBJECT(m_widget), "size_allocate",
	363	GTK_SIGNAL_FUNC(gtk_glcanvas_size_callback), (gpointer)this );
	364
aae24d21 RR	365	gtk_widget_pop_visual();
	366	gtk_widget_pop_colormap();
	367
aae24d21	368	return TRUE;
9d3221ab RR	369	}
	370
	371	wxGLCanvas::~wxGLCanvas()
	372	{
4b59bea3 RR	373	XVisualInfo vi = (XVisualInfo ) m_vi;
4b59bea3 RR	374
b8167e73	375	if (vi) XFree( vi );
bbe0af5b	376	if (m_glContext) delete m_glContext;
9d3221ab RR	377	}
	378
	379	void wxGLCanvas::SwapBuffers()
	380	{
bbe0af5b	381	if (m_glContext) m_glContext->SwapBuffers();
9d3221ab RR	382	}
	383
	384	void wxGLCanvas::OnSize(wxSizeEvent& WXUNUSED(event))
	385	{
bbe0af5b	386	int width, height;
aae24d21	387	GetClientSize( &width, &height );
5fd11f09	388
aae24d21	389	if (m_glContext && GTK_WIDGET_REALIZED(m_glWidget) )
bbe0af5b	390	{
aae24d21 RR	391	SetCurrent();
	392
	393	glViewport(0, 0, (GLint)width, (GLint)height );
bbe0af5b RR	394	glMatrixMode(GL_PROJECTION);
	395	glLoadIdentity();
	396	glFrustum( -1.0, 1.0, -1.0, 1.0, 5.0, 15.0 );
	397	glMatrixMode(GL_MODELVIEW);
	398	}
9d3221ab RR	399	}
	400
	401	void wxGLCanvas::SetCurrent()
	402	{
bbe0af5b	403	if (m_glContext) m_glContext->SetCurrent();
9d3221ab RR	404	}
	405
	406	void wxGLCanvas::SetColour( const char *colour )
	407	{
bbe0af5b	408	if (m_glContext) m_glContext->SetColour( colour );
9d3221ab RR	409	}
9d3221ab RR	410
147bc491	411	void wxGLCanvas::OnInternalIdle()
bbe0af5b	412	{
147bc491 RR	413	if (m_glContext && m_exposed)
	414	{
	415	wxPaintEvent event( GetId() );
	416	event.SetEventObject( this );
	417	GetEventHandler()->ProcessEvent( event );
9d3221ab	418
147bc491 RR	419	m_exposed = FALSE;
	420	GetUpdateRegion().Clear();
	421	}
54517652 RR	422
	423	wxWindow::OnInternalIdle();
	424	}