src/gtk/glcanvas.cpp

/////////////////////////////////////////////////////////////////////////////
// Name:        src/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
/////////////////////////////////////////////////////////////////////////////

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

#if wxUSE_GLCANVAS

#include "wx/glcanvas.h"

#ifndef WX_PRECOMP
    #include "wx/app.h"
    #include "wx/frame.h"
    #include "wx/colour.h"
    #include "wx/module.h"
#endif // WX_PRECOMP

extern "C"
{
#include "gtk/gtk.h"
#include "gdk/gdk.h"
#include "gdk/gdkx.h"
}

#include "wx/gtk/win_gtk.h"
#include "wx/gtk/private.h"

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


//---------------------------------------------------------------------------
// static variables
//---------------------------------------------------------------------------
int wxGLCanvas::m_glxVersion = 0;

//---------------------------------------------------------------------------
// global data
//---------------------------------------------------------------------------

XVisualInfo *g_vi = (XVisualInfo*) NULL;

//---------------------------------------------------------------------------
// wxGLContext
//---------------------------------------------------------------------------

IMPLEMENT_CLASS(wxGLContext,wxObject)

wxGLContext::wxGLContext(wxWindow* win, const wxGLContext* other)
{
    wxGLCanvas *gc = (wxGLCanvas*) win;

    if (wxGLCanvas::GetGLXVersion() >= 13)
    {
        // GLX >= 1.3
        GLXFBConfig *fbc = gc->m_fbc;
        wxCHECK_RET( fbc, _T("invalid GLXFBConfig for OpenGl") );
        m_glContext = glXCreateNewContext( GDK_DISPLAY(), fbc[0], GLX_RGBA_TYPE,
                                           other ? other->m_glContext : None,
                                           GL_TRUE );
    }
    else
    {
        // GLX <= 1.2
        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())
    {
        if (wxGLCanvas::GetGLXVersion() >= 13)
            // GLX >= 1.3
            glXMakeContextCurrent( GDK_DISPLAY(), None, None, NULL);
        else
            // GLX <= 1.2
            glXMakeCurrent( GDK_DISPLAY(), None, NULL);
    }

    glXDestroyContext( GDK_DISPLAY(), m_glContext );
}

void wxGLContext::SetCurrent(const wxGLCanvas& win) const
{
    if (m_glContext)
    {
        GdkWindow *window = GTK_PIZZA(win.m_wxwindow)->bin_window;

        if (wxGLCanvas::GetGLXVersion() >= 13)
            // GLX >= 1.3
            glXMakeContextCurrent( GDK_DISPLAY(), GDK_WINDOW_XWINDOW(window), GDK_WINDOW_XWINDOW(window), m_glContext );
        else
            // GLX <= 1.2
            glXMakeCurrent( GDK_DISPLAY(), GDK_WINDOW_XWINDOW(window), m_glContext );
    }
}


//-----------------------------------------------------------------------------
// "realize" from m_wxwindow
//-----------------------------------------------------------------------------

extern "C" {
static gint
gtk_glwindow_realized_callback( GtkWidget *WXUNUSED(widget), wxGLCanvas *win )
{
    if (!win->m_glContext && win->m_createImplicitContext)
    {
        wxGLContext *share = win->m_sharedContext;
        if ( !share && win->m_sharedContextOf )
            share = win->m_sharedContextOf->GetContext();

        win->m_glContext = new wxGLContext(win, share);
    }

    return FALSE;
}
}

//-----------------------------------------------------------------------------
// "map" from m_wxwindow
//-----------------------------------------------------------------------------

extern "C" {
static gint
gtk_glwindow_map_callback( GtkWidget * WXUNUSED(widget), wxGLCanvas *win )
{
    // CF: Can the "if" line be removed, and the code unconditionally (always) be run?
    if (win->m_glContext || !win->m_createImplicitContext)
    {
        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
//-----------------------------------------------------------------------------

extern "C" {
static gboolean
gtk_glwindow_expose_callback( GtkWidget *WXUNUSED(widget), GdkEventExpose *gdk_event, wxGLCanvas *win )
{
    // don't need to install idle handler, its done from "event" signal

    win->m_exposed = true;

    win->GetUpdateRegion().Union( gdk_event->area.x,
                                  gdk_event->area.y,
                                  gdk_event->area.width,
                                  gdk_event->area.height );
    return false;
}
}

//-----------------------------------------------------------------------------
// "size_allocate" of m_wxwindow
//-----------------------------------------------------------------------------

extern "C" {
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,
                        int *attribList,
                        const wxPoint& pos, const wxSize& size,
                        long style, const wxString& name,
                        const wxPalette& palette )
    : m_createImplicitContext(false)
{
    Create( parent, NULL, NULL, id, pos, size, style, name, attribList, palette );
}

wxGLCanvas::wxGLCanvas( wxWindow *parent, wxWindowID id,
                        const wxPoint& pos, const wxSize& size,
                        long style, const wxString& name,
                        int *attribList,
                        const wxPalette& palette )
    : m_createImplicitContext(true)
{
    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 )
    : m_createImplicitContext(true)
{
    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 )
    : m_createImplicitContext(true)
{
    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;
    m_fbc = NULL;
    m_vi = NULL;

    // to be sure the glx version is known
    wxGLCanvas::QueryGLXVersion();

    if (wxGLCanvas::GetGLXVersion() >= 13)
    {
        // GLX >= 1.3 uses a GLXFBConfig
        GLXFBConfig * fbc = NULL;
        if (wxTheApp->m_glFBCInfo != NULL)
        {
            fbc = (GLXFBConfig *) wxTheApp->m_glFBCInfo;
            m_canFreeFBC = false; // owned by wxTheApp - don't free upon destruction
        }
        else
        {
            fbc = (GLXFBConfig *) wxGLCanvas::ChooseGLFBC(attribList);
            m_canFreeFBC = true;
        }
        m_fbc = fbc;  // save for later use
        wxCHECK_MSG( m_fbc, false, _T("required FBConfig couldn't be found") );
    }

    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
    {
        if (wxGLCanvas::GetGLXVersion() >= 13)
        // GLX >= 1.3
            vi = glXGetVisualFromFBConfig(GDK_DISPLAY(), m_fbc[0]);
        else
            // GLX <= 1.2
            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;
    GdkColormap *colormap;

    // MR: This needs a fix for lower gtk+ versions too. Might need to rethink logic (FIXME)
#if defined(__WXGTK20__) && GTK_CHECK_VERSION(2,2,0)
    if (!gtk_check_version(2,2,0))
    {
        wxWindow::Create( parent, id, pos, size, style, name );

        m_glWidget = m_wxwindow;

        GdkScreen *screen = gtk_widget_get_screen( m_glWidget );
        colormap = gdk_screen_get_default_colormap(screen);
        visual = gdk_colormap_get_visual(colormap);

        if (GDK_VISUAL_XVISUAL(visual)->visualid != vi->visualid)
        {
            visual = gdk_x11_screen_lookup_visual( screen, vi->visualid );
            colormap = gdk_colormap_new(visual, FALSE);
        }

        gtk_widget_set_colormap( m_glWidget, colormap );
    }
    else
#endif
    {
        visual = gdkx_visual_get( vi->visualid );
        colormap = gdk_colormap_new( visual, TRUE );

        gtk_widget_push_colormap( colormap );

        wxWindow::Create( parent, id, pos, size, style, name );
        m_glWidget = m_wxwindow;
    }

    gtk_widget_set_double_buffered( m_glWidget, FALSE );

    g_signal_connect(m_wxwindow, "realize",       G_CALLBACK(gtk_glwindow_realized_callback), this);
    g_signal_connect(m_wxwindow, "map",           G_CALLBACK(gtk_glwindow_map_callback),      this);
    g_signal_connect(m_wxwindow, "expose_event",  G_CALLBACK(gtk_glwindow_expose_callback),   this);
    g_signal_connect(m_widget,   "size_allocate", G_CALLBACK(gtk_glcanvas_size_callback),     this);

    if (gtk_check_version(2,2,0) != NULL)
    {
        gtk_widget_pop_colormap();
    }

    // if our parent window is already visible, we had been realized before we
    // connected to the "realize" signal and hence our m_glContext hasn't been
    // initialized yet and we have to do it now
    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()
{
    GLXFBConfig * fbc = (GLXFBConfig *) m_fbc;
    if (fbc && m_canFreeFBC)
        XFree( fbc );

    XVisualInfo *vi = (XVisualInfo *) m_vi;
    if (vi && m_canFreeVi)
        XFree( vi );

    delete m_glContext;
}

void* wxGLCanvas::ChooseGLVisual(int *attribList)
{
    int data[512];
    GetGLAttribListFromWX( attribList, data );
    attribList = (int*) data;

    Display *dpy = GDK_DISPLAY();

    return glXChooseVisual( dpy, DefaultScreen(dpy), attribList );
}

void* wxGLCanvas::ChooseGLFBC(int *attribList)
{
    int data[512];
    GetGLAttribListFromWX( attribList, data );
    attribList = (int*) data;

    int returned;
    return glXChooseFBConfig( GDK_DISPLAY(), DefaultScreen(GDK_DISPLAY()),
                              attribList, &returned );
}


void wxGLCanvas::GetGLAttribListFromWX(int *wx_attribList, int *gl_attribList )
{
    if (!wx_attribList)
    {
        if (wxGLCanvas::GetGLXVersion() >= 13)
        // leave GLX >= 1.3 choose the default attributes
            gl_attribList[0] = 0;
        else
        {
            int i = 0;
            // default settings if attriblist = 0
            gl_attribList[i++] = GLX_RGBA;
            gl_attribList[i++] = GLX_DOUBLEBUFFER;
            gl_attribList[i++] = GLX_DEPTH_SIZE;   gl_attribList[i++] = 1;
            gl_attribList[i++] = GLX_RED_SIZE;     gl_attribList[i++] = 1;
            gl_attribList[i++] = GLX_GREEN_SIZE;   gl_attribList[i++] = 1;
            gl_attribList[i++] = GLX_BLUE_SIZE;    gl_attribList[i++] = 1;
            gl_attribList[i++] = GLX_ALPHA_SIZE;   gl_attribList[i++] = 0;
            gl_attribList[i++] = None;
        }
    }
    else
    {
        int arg=0, p=0;
        while( (wx_attribList[arg]!=0) && (p<510) )
        {
            switch( wx_attribList[arg++] )
            {
                case WX_GL_RGBA:
                    if (wxGLCanvas::GetGLXVersion() <= 12)
                        // for GLX >= 1.3, GLX_RGBA is useless (setting this flags will crash on most opengl implm)
                        gl_attribList[p++] = GLX_RGBA;
                    break;
                case WX_GL_BUFFER_SIZE:
                    gl_attribList[p++] = GLX_BUFFER_SIZE;
                    gl_attribList[p++] = wx_attribList[arg++];
                    break;
                case WX_GL_LEVEL:
                    gl_attribList[p++] = GLX_LEVEL;
                    gl_attribList[p++] = wx_attribList[arg++];
                    break;
                case WX_GL_DOUBLEBUFFER:
                    if (wxGLCanvas::GetGLXVersion() <= 12)
                        gl_attribList[p++] = GLX_DOUBLEBUFFER;
                    else
                        // for GLX >= 1.3, GLX_DOUBLEBUFFER format is different (1 <=> True)
                        // it seems this flag is useless for some hardware opengl implementation.
                        // but for Mesa 6.2.1, this flag is used so don't ignore it.
                        gl_attribList[p++] = GLX_DOUBLEBUFFER;
                    gl_attribList[p++] = 1;
                    break;
                case WX_GL_STEREO:
                    gl_attribList[p++] = GLX_STEREO;
                    break;
                case WX_GL_AUX_BUFFERS:
                    gl_attribList[p++] = GLX_AUX_BUFFERS;
                    gl_attribList[p++] = wx_attribList[arg++];
                    break;
                case WX_GL_MIN_RED:
                    gl_attribList[p++] = GLX_RED_SIZE;
                    gl_attribList[p++] = wx_attribList[arg++];
                    break;
                case WX_GL_MIN_GREEN:
                    gl_attribList[p++] = GLX_GREEN_SIZE;
                    gl_attribList[p++] = wx_attribList[arg++];
                    break;
                case WX_GL_MIN_BLUE:
                    gl_attribList[p++] = GLX_BLUE_SIZE;
                    gl_attribList[p++] = wx_attribList[arg++];
                    break;
                case WX_GL_MIN_ALPHA:
                    gl_attribList[p++] = GLX_ALPHA_SIZE;
                    gl_attribList[p++] = wx_attribList[arg++];
                    break;
                case WX_GL_DEPTH_SIZE:
                    gl_attribList[p++] = GLX_DEPTH_SIZE;
                    gl_attribList[p++] = wx_attribList[arg++];
                    break;
                case WX_GL_STENCIL_SIZE:
                    gl_attribList[p++] = GLX_STENCIL_SIZE;
                    gl_attribList[p++] = wx_attribList[arg++];
                    break;
                case WX_GL_MIN_ACCUM_RED:
                    gl_attribList[p++] = GLX_ACCUM_RED_SIZE;
                    gl_attribList[p++] = wx_attribList[arg++];
                    break;
                case WX_GL_MIN_ACCUM_GREEN:
                    gl_attribList[p++] = GLX_ACCUM_GREEN_SIZE;
                    gl_attribList[p++] = wx_attribList[arg++];
                    break;
                case WX_GL_MIN_ACCUM_BLUE:
                    gl_attribList[p++] = GLX_ACCUM_BLUE_SIZE;
                    gl_attribList[p++] = wx_attribList[arg++];
                    break;
                case WX_GL_MIN_ACCUM_ALPHA:
                    gl_attribList[p++] = GLX_ACCUM_ALPHA_SIZE;
                    gl_attribList[p++] = wx_attribList[arg++];
                    break;
                default:
                    break;
            }
        }

        gl_attribList[p] = 0;
    }
}

void wxGLCanvas::QueryGLXVersion()
{
    if (m_glxVersion == 0)
    {
        // check the GLX version
        int glxMajorVer, glxMinorVer;
        bool ok = glXQueryVersion(GDK_DISPLAY(), &glxMajorVer, &glxMinorVer);
        wxASSERT_MSG( ok, _T("GLX version not found") );
        if (!ok)
            m_glxVersion = 10; // 1.0 by default
        else
            m_glxVersion = glxMajorVer*10 + glxMinorVer;
    }
}

int wxGLCanvas::GetGLXVersion()
{
    wxASSERT_MSG( m_glxVersion>0, _T("GLX version has not been initialized with wxGLCanvas::QueryGLXVersion()") );
    return m_glxVersion;
}


void wxGLCanvas::SwapBuffers()
{
    GdkWindow *window = GTK_PIZZA(m_wxwindow)->bin_window;
    glXSwapBuffers( GDK_DISPLAY(), GDK_WINDOW_XWINDOW( window ) );
}

void wxGLCanvas::OnSize(wxSizeEvent& WXUNUSED(event))
{
}

void wxGLCanvas::SetCurrent(const wxGLContext& RC) const
{
    RC.SetCurrent(*this);
}

void wxGLCanvas::SetCurrent()
{
    if (m_glContext)
        m_glContext->SetCurrent(*this);
}

void wxGLCanvas::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 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_glFBCInfo)
        XFree(m_glFBCInfo);
    if (m_glVisualInfo)
        XFree(m_glVisualInfo);
}

bool wxGLApp::InitGLVisual(int *attribList)
{
    wxGLCanvas::QueryGLXVersion();

    if (wxGLCanvas::GetGLXVersion() >= 13)
    {
        // GLX >= 1.3
        if (m_glFBCInfo)
            XFree(m_glFBCInfo);
        m_glFBCInfo = wxGLCanvas::ChooseGLFBC(attribList);

        if (m_glFBCInfo)
        {
            if (m_glVisualInfo)
                XFree(m_glVisualInfo);
            m_glVisualInfo = glXGetVisualFromFBConfig(GDK_DISPLAY(), ((GLXFBConfig *)m_glFBCInfo)[0]);
        }
        return (m_glFBCInfo != NULL) && (m_glVisualInfo != NULL);
    }
    else
    {
        // GLX <= 1.2
        if (m_glVisualInfo)
            XFree(m_glVisualInfo);
        m_glVisualInfo = wxGLCanvas::ChooseGLVisual(attribList);
        return m_glVisualInfo != NULL;
    }
}

#endif
    // wxUSE_GLCANVAS
Commit	Line	Data
	1	/////////////////////////////////////////////////////////////////////////////
	2	// Name: src/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	// For compilers that support precompilation, includes "wx.h".
	13	#include "wx/wxprec.h"
	14
	15	#if wxUSE_GLCANVAS
	16
	17	#include "wx/glcanvas.h"
	18
	19	#ifndef WX_PRECOMP
	20	#include "wx/app.h"
	21	#include "wx/frame.h"
	22	#include "wx/colour.h"
	23	#include "wx/module.h"
	24	#endif // WX_PRECOMP
	25
	26	extern "C"
	27	{
	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	#include "wx/gtk/private.h"
	35
	36	// DLL options compatibility check:
	37	#include "wx/build.h"
	38	WX_CHECK_BUILD_OPTIONS("wxGL")
	39
	40
	41	//---------------------------------------------------------------------------
	42	// static variables
	43	//---------------------------------------------------------------------------
	44	int wxGLCanvas::m_glxVersion = 0;
	45
	46	//---------------------------------------------------------------------------
	47	// global data
	48	//---------------------------------------------------------------------------
	49
	50	XVisualInfo g_vi = (XVisualInfo) NULL;
	51
	52	//---------------------------------------------------------------------------
	53	// wxGLContext
	54	//---------------------------------------------------------------------------
	55
	56	IMPLEMENT_CLASS(wxGLContext,wxObject)
	57
	58	wxGLContext::wxGLContext(wxWindow* win, const wxGLContext* other)
	59	{
	60	wxGLCanvas gc = (wxGLCanvas) win;
	61
	62	if (wxGLCanvas::GetGLXVersion() >= 13)
	63	{
	64	// GLX >= 1.3
	65	GLXFBConfig *fbc = gc->m_fbc;
	66	wxCHECK_RET( fbc, _T("invalid GLXFBConfig for OpenGl") );
	67	m_glContext = glXCreateNewContext( GDK_DISPLAY(), fbc[0], GLX_RGBA_TYPE,
	68	other ? other->m_glContext : None,
	69	GL_TRUE );
	70	}
	71	else
	72	{
	73	// GLX <= 1.2
	74	XVisualInfo vi = (XVisualInfo ) gc->m_vi;
	75	wxCHECK_RET( vi, _T("invalid visual for OpenGl") );
	76	m_glContext = glXCreateContext( GDK_DISPLAY(), vi,
	77	other ? other->m_glContext : None,
	78	GL_TRUE );
	79	}
	80
	81	if ( !m_glContext )
	82	{
	83	wxFAIL_MSG( _T("Couldn't create OpenGl context") );
	84	}
	85	}
	86
	87	wxGLContext::~wxGLContext()
	88	{
	89	if (!m_glContext) return;
	90
	91	if (m_glContext == glXGetCurrentContext())
	92	{
	93	if (wxGLCanvas::GetGLXVersion() >= 13)
	94	// GLX >= 1.3
	95	glXMakeContextCurrent( GDK_DISPLAY(), None, None, NULL);
	96	else
	97	// GLX <= 1.2
	98	glXMakeCurrent( GDK_DISPLAY(), None, NULL);
	99	}
	100
	101	glXDestroyContext( GDK_DISPLAY(), m_glContext );
	102	}
	103
	104	void wxGLContext::SetCurrent(const wxGLCanvas& win) const
	105	{
	106	if (m_glContext)
	107	{
	108	GdkWindow *window = GTK_PIZZA(win.m_wxwindow)->bin_window;
	109
	110	if (wxGLCanvas::GetGLXVersion() >= 13)
	111	// GLX >= 1.3
	112	glXMakeContextCurrent( GDK_DISPLAY(), GDK_WINDOW_XWINDOW(window), GDK_WINDOW_XWINDOW(window), m_glContext );
	113	else
	114	// GLX <= 1.2
	115	glXMakeCurrent( GDK_DISPLAY(), GDK_WINDOW_XWINDOW(window), m_glContext );
	116	}
	117	}
	118
	119
	120	//-----------------------------------------------------------------------------
	121	// "realize" from m_wxwindow
	122	//-----------------------------------------------------------------------------
	123
	124	extern "C" {
	125	static gint
	126	gtk_glwindow_realized_callback( GtkWidget WXUNUSED(widget), wxGLCanvas win )
	127	{
	128	if (!win->m_glContext && win->m_createImplicitContext)
	129	{
	130	wxGLContext *share = win->m_sharedContext;
	131	if ( !share && win->m_sharedContextOf )
	132	share = win->m_sharedContextOf->GetContext();
	133
	134	win->m_glContext = new wxGLContext(win, share);
	135	}
	136
	137	return FALSE;
	138	}
	139	}
	140
	141	//-----------------------------------------------------------------------------
	142	// "map" from m_wxwindow
	143	//-----------------------------------------------------------------------------
	144
	145	extern "C" {
	146	static gint
	147	gtk_glwindow_map_callback( GtkWidget * WXUNUSED(widget), wxGLCanvas *win )
	148	{
	149	// CF: Can the "if" line be removed, and the code unconditionally (always) be run?
	150	if (win->m_glContext \|\| !win->m_createImplicitContext)
	151	{
	152	wxPaintEvent event( win->GetId() );
	153	event.SetEventObject( win );
	154	win->GetEventHandler()->ProcessEvent( event );
	155
	156	win->m_exposed = false;
	157	win->GetUpdateRegion().Clear();
	158	}
	159
	160	return FALSE;
	161	}
	162	}
	163
	164	//-----------------------------------------------------------------------------
	165	// "expose_event" of m_wxwindow
	166	//-----------------------------------------------------------------------------
	167
	168	extern "C" {
	169	static gboolean
	170	gtk_glwindow_expose_callback( GtkWidget WXUNUSED(widget), GdkEventExpose gdk_event, wxGLCanvas *win )
	171	{
	172	// don't need to install idle handler, its done from "event" signal
	173
	174	win->m_exposed = true;
	175
	176	win->GetUpdateRegion().Union( gdk_event->area.x,
	177	gdk_event->area.y,
	178	gdk_event->area.width,
	179	gdk_event->area.height );
	180	return false;
	181	}
	182	}
	183
	184	//-----------------------------------------------------------------------------
	185	// "size_allocate" of m_wxwindow
	186	//-----------------------------------------------------------------------------
	187
	188	extern "C" {
	189	static void
	190	gtk_glcanvas_size_callback( GtkWidget WXUNUSED(widget), GtkAllocation alloc, wxGLCanvas *win )
	191	{
	192	if (g_isIdle)
	193	wxapp_install_idle_handler();
	194
	195	if (!win->m_hasVMT)
	196	return;
	197
	198	wxSizeEvent event( wxSize(win->m_width,win->m_height), win->GetId() );
	199	event.SetEventObject( win );
	200	win->GetEventHandler()->ProcessEvent( event );
	201	}
	202	}
	203
	204	//---------------------------------------------------------------------------
	205	// wxGlCanvas
	206	//---------------------------------------------------------------------------
	207
	208	IMPLEMENT_CLASS(wxGLCanvas, wxWindow)
	209
	210	BEGIN_EVENT_TABLE(wxGLCanvas, wxWindow)
	211	EVT_SIZE(wxGLCanvas::OnSize)
	212	END_EVENT_TABLE()
	213
	214	wxGLCanvas::wxGLCanvas( wxWindow *parent, wxWindowID id,
	215	int *attribList,
	216	const wxPoint& pos, const wxSize& size,
	217	long style, const wxString& name,
	218	const wxPalette& palette )
	219	: m_createImplicitContext(false)
	220	{
	221	Create( parent, NULL, NULL, id, pos, size, style, name, attribList, palette );
	222	}
	223
	224	wxGLCanvas::wxGLCanvas( wxWindow *parent, wxWindowID id,
	225	const wxPoint& pos, const wxSize& size,
	226	long style, const wxString& name,
	227	int *attribList,
	228	const wxPalette& palette )
	229	: m_createImplicitContext(true)
	230	{
	231	Create( parent, NULL, NULL, id, pos, size, style, name, attribList, palette );
	232	}
	233
	234	wxGLCanvas::wxGLCanvas( wxWindow *parent,
	235	const wxGLContext *shared,
	236	wxWindowID id,
	237	const wxPoint& pos, const wxSize& size,
	238	long style, const wxString& name,
	239	int *attribList,
	240	const wxPalette& palette )
	241	: m_createImplicitContext(true)
	242	{
	243	Create( parent, shared, NULL, id, pos, size, style, name, attribList, palette );
	244	}
	245
	246	wxGLCanvas::wxGLCanvas( wxWindow *parent,
	247	const wxGLCanvas *shared,
	248	wxWindowID id,
	249	const wxPoint& pos, const wxSize& size,
	250	long style, const wxString& name,
	251	int *attribList,
	252	const wxPalette& palette )
	253	: m_createImplicitContext(true)
	254	{
	255	Create( parent, NULL, shared, id, pos, size, style, name, attribList, palette );
	256	}
	257
	258	bool wxGLCanvas::Create( wxWindow *parent,
	259	const wxGLContext *shared,
	260	const wxGLCanvas *shared_context_of,
	261	wxWindowID id,
	262	const wxPoint& pos, const wxSize& size,
	263	long style, const wxString& name,
	264	int *attribList,
	265	const wxPalette& palette)
	266	{
	267	m_sharedContext = (wxGLContext*)shared; // const_cast
	268	m_sharedContextOf = (wxGLCanvas*)shared_context_of; // const_cast
	269	m_glContext = (wxGLContext*) NULL;
	270
	271	m_exposed = false;
	272	m_noExpose = true;
	273	m_nativeSizeEvent = true;
	274	m_fbc = NULL;
	275	m_vi = NULL;
	276
	277	// to be sure the glx version is known
	278	wxGLCanvas::QueryGLXVersion();
	279
	280	if (wxGLCanvas::GetGLXVersion() >= 13)
	281	{
	282	// GLX >= 1.3 uses a GLXFBConfig
	283	GLXFBConfig * fbc = NULL;
	284	if (wxTheApp->m_glFBCInfo != NULL)
	285	{
	286	fbc = (GLXFBConfig *) wxTheApp->m_glFBCInfo;
	287	m_canFreeFBC = false; // owned by wxTheApp - don't free upon destruction
	288	}
	289	else
	290	{
	291	fbc = (GLXFBConfig *) wxGLCanvas::ChooseGLFBC(attribList);
	292	m_canFreeFBC = true;
	293	}
	294	m_fbc = fbc; // save for later use
	295	wxCHECK_MSG( m_fbc, false, _T("required FBConfig couldn't be found") );
	296	}
	297
	298	XVisualInfo *vi = NULL;
	299	if (wxTheApp->m_glVisualInfo != NULL)
	300	{
	301	vi = (XVisualInfo *)wxTheApp->m_glVisualInfo;
	302	m_canFreeVi = false; // owned by wxTheApp - don't free upon destruction
	303	}
	304	else
	305	{
	306	if (wxGLCanvas::GetGLXVersion() >= 13)
	307	// GLX >= 1.3
	308	vi = glXGetVisualFromFBConfig(GDK_DISPLAY(), m_fbc[0]);
	309	else
	310	// GLX <= 1.2
	311	vi = (XVisualInfo *) ChooseGLVisual(attribList);
	312
	313	m_canFreeVi = true;
	314	}
	315
	316	m_vi = vi; // save for later use
	317
	318	wxCHECK_MSG( m_vi, false, _T("required visual couldn't be found") );
	319	GdkVisual *visual;
	320	GdkColormap *colormap;
	321
	322	// MR: This needs a fix for lower gtk+ versions too. Might need to rethink logic (FIXME)
	323	#if defined(__WXGTK20__) && GTK_CHECK_VERSION(2,2,0)
	324	if (!gtk_check_version(2,2,0))
	325	{
	326	wxWindow::Create( parent, id, pos, size, style, name );
	327
	328	m_glWidget = m_wxwindow;
	329
	330	GdkScreen *screen = gtk_widget_get_screen( m_glWidget );
	331	colormap = gdk_screen_get_default_colormap(screen);
	332	visual = gdk_colormap_get_visual(colormap);
	333
	334	if (GDK_VISUAL_XVISUAL(visual)->visualid != vi->visualid)
	335	{
	336	visual = gdk_x11_screen_lookup_visual( screen, vi->visualid );
	337	colormap = gdk_colormap_new(visual, FALSE);
	338	}
	339
	340	gtk_widget_set_colormap( m_glWidget, colormap );
	341	}
	342	else
	343	#endif
	344	{
	345	visual = gdkx_visual_get( vi->visualid );
	346	colormap = gdk_colormap_new( visual, TRUE );
	347
	348	gtk_widget_push_colormap( colormap );
	349
	350	wxWindow::Create( parent, id, pos, size, style, name );
	351	m_glWidget = m_wxwindow;
	352	}
	353
	354	gtk_widget_set_double_buffered( m_glWidget, FALSE );
	355
	356	g_signal_connect(m_wxwindow, "realize", G_CALLBACK(gtk_glwindow_realized_callback), this);
	357	g_signal_connect(m_wxwindow, "map", G_CALLBACK(gtk_glwindow_map_callback), this);
	358	g_signal_connect(m_wxwindow, "expose_event", G_CALLBACK(gtk_glwindow_expose_callback), this);
	359	g_signal_connect(m_widget, "size_allocate", G_CALLBACK(gtk_glcanvas_size_callback), this);
	360
	361	if (gtk_check_version(2,2,0) != NULL)
	362	{
	363	gtk_widget_pop_colormap();
	364	}
	365
	366	// if our parent window is already visible, we had been realized before we
	367	// connected to the "realize" signal and hence our m_glContext hasn't been
	368	// initialized yet and we have to do it now
	369	if (GTK_WIDGET_REALIZED(m_wxwindow))
	370	gtk_glwindow_realized_callback( m_wxwindow, this );
	371
	372	if (GTK_WIDGET_MAPPED(m_wxwindow))
	373	gtk_glwindow_map_callback( m_wxwindow, this );
	374
	375	return true;
	376	}
	377
	378	wxGLCanvas::~wxGLCanvas()
	379	{
	380	GLXFBConfig * fbc = (GLXFBConfig *) m_fbc;
	381	if (fbc && m_canFreeFBC)
	382	XFree( fbc );
	383
	384	XVisualInfo vi = (XVisualInfo ) m_vi;
	385	if (vi && m_canFreeVi)
	386	XFree( vi );
	387
	388	delete m_glContext;
	389	}
	390
	391	void* wxGLCanvas::ChooseGLVisual(int *attribList)
	392	{
	393	int data[512];
	394	GetGLAttribListFromWX( attribList, data );
	395	attribList = (int*) data;
	396
	397	Display *dpy = GDK_DISPLAY();
	398
	399	return glXChooseVisual( dpy, DefaultScreen(dpy), attribList );
	400	}
	401
	402	void* wxGLCanvas::ChooseGLFBC(int *attribList)
	403	{
	404	int data[512];
	405	GetGLAttribListFromWX( attribList, data );
	406	attribList = (int*) data;
	407
	408	int returned;
	409	return glXChooseFBConfig( GDK_DISPLAY(), DefaultScreen(GDK_DISPLAY()),
	410	attribList, &returned );
	411	}
	412
	413
	414	void wxGLCanvas::GetGLAttribListFromWX(int wx_attribList, int gl_attribList )
	415	{
	416	if (!wx_attribList)
	417	{
	418	if (wxGLCanvas::GetGLXVersion() >= 13)
	419	// leave GLX >= 1.3 choose the default attributes
	420	gl_attribList[0] = 0;
	421	else
	422	{
	423	int i = 0;
	424	// default settings if attriblist = 0
	425	gl_attribList[i++] = GLX_RGBA;
	426	gl_attribList[i++] = GLX_DOUBLEBUFFER;
	427	gl_attribList[i++] = GLX_DEPTH_SIZE; gl_attribList[i++] = 1;
	428	gl_attribList[i++] = GLX_RED_SIZE; gl_attribList[i++] = 1;
	429	gl_attribList[i++] = GLX_GREEN_SIZE; gl_attribList[i++] = 1;
	430	gl_attribList[i++] = GLX_BLUE_SIZE; gl_attribList[i++] = 1;
	431	gl_attribList[i++] = GLX_ALPHA_SIZE; gl_attribList[i++] = 0;
	432	gl_attribList[i++] = None;
	433	}
	434	}
	435	else
	436	{
	437	int arg=0, p=0;
	438	while( (wx_attribList[arg]!=0) && (p<510) )
	439	{
	440	switch( wx_attribList[arg++] )
	441	{
	442	case WX_GL_RGBA:
	443	if (wxGLCanvas::GetGLXVersion() <= 12)
	444	// for GLX >= 1.3, GLX_RGBA is useless (setting this flags will crash on most opengl implm)
	445	gl_attribList[p++] = GLX_RGBA;
	446	break;
	447	case WX_GL_BUFFER_SIZE:
	448	gl_attribList[p++] = GLX_BUFFER_SIZE;
	449	gl_attribList[p++] = wx_attribList[arg++];
	450	break;
	451	case WX_GL_LEVEL:
	452	gl_attribList[p++] = GLX_LEVEL;
	453	gl_attribList[p++] = wx_attribList[arg++];
	454	break;
	455	case WX_GL_DOUBLEBUFFER:
	456	if (wxGLCanvas::GetGLXVersion() <= 12)
	457	gl_attribList[p++] = GLX_DOUBLEBUFFER;
	458	else
	459	// for GLX >= 1.3, GLX_DOUBLEBUFFER format is different (1 <=> True)
	460	// it seems this flag is useless for some hardware opengl implementation.
	461	// but for Mesa 6.2.1, this flag is used so don't ignore it.
	462	gl_attribList[p++] = GLX_DOUBLEBUFFER;
	463	gl_attribList[p++] = 1;
	464	break;
	465	case WX_GL_STEREO:
	466	gl_attribList[p++] = GLX_STEREO;
	467	break;
	468	case WX_GL_AUX_BUFFERS:
	469	gl_attribList[p++] = GLX_AUX_BUFFERS;
	470	gl_attribList[p++] = wx_attribList[arg++];
	471	break;
	472	case WX_GL_MIN_RED:
	473	gl_attribList[p++] = GLX_RED_SIZE;
	474	gl_attribList[p++] = wx_attribList[arg++];
	475	break;
	476	case WX_GL_MIN_GREEN:
	477	gl_attribList[p++] = GLX_GREEN_SIZE;
	478	gl_attribList[p++] = wx_attribList[arg++];
	479	break;
	480	case WX_GL_MIN_BLUE:
	481	gl_attribList[p++] = GLX_BLUE_SIZE;
	482	gl_attribList[p++] = wx_attribList[arg++];
	483	break;
	484	case WX_GL_MIN_ALPHA:
	485	gl_attribList[p++] = GLX_ALPHA_SIZE;
	486	gl_attribList[p++] = wx_attribList[arg++];
	487	break;
	488	case WX_GL_DEPTH_SIZE:
	489	gl_attribList[p++] = GLX_DEPTH_SIZE;
	490	gl_attribList[p++] = wx_attribList[arg++];
	491	break;
	492	case WX_GL_STENCIL_SIZE:
	493	gl_attribList[p++] = GLX_STENCIL_SIZE;
	494	gl_attribList[p++] = wx_attribList[arg++];
	495	break;
	496	case WX_GL_MIN_ACCUM_RED:
	497	gl_attribList[p++] = GLX_ACCUM_RED_SIZE;
	498	gl_attribList[p++] = wx_attribList[arg++];
	499	break;
	500	case WX_GL_MIN_ACCUM_GREEN:
	501	gl_attribList[p++] = GLX_ACCUM_GREEN_SIZE;
	502	gl_attribList[p++] = wx_attribList[arg++];
	503	break;
	504	case WX_GL_MIN_ACCUM_BLUE:
	505	gl_attribList[p++] = GLX_ACCUM_BLUE_SIZE;
	506	gl_attribList[p++] = wx_attribList[arg++];
	507	break;
	508	case WX_GL_MIN_ACCUM_ALPHA:
	509	gl_attribList[p++] = GLX_ACCUM_ALPHA_SIZE;
	510	gl_attribList[p++] = wx_attribList[arg++];
	511	break;
	512	default:
	513	break;
	514	}
	515	}
	516
	517	gl_attribList[p] = 0;
	518	}
	519	}
	520
	521	void wxGLCanvas::QueryGLXVersion()
	522	{
	523	if (m_glxVersion == 0)
	524	{
	525	// check the GLX version
	526	int glxMajorVer, glxMinorVer;
	527	bool ok = glXQueryVersion(GDK_DISPLAY(), &glxMajorVer, &glxMinorVer);
	528	wxASSERT_MSG( ok, _T("GLX version not found") );
	529	if (!ok)
	530	m_glxVersion = 10; // 1.0 by default
	531	else
	532	m_glxVersion = glxMajorVer*10 + glxMinorVer;
	533	}
	534	}
	535
	536	int wxGLCanvas::GetGLXVersion()
	537	{
	538	wxASSERT_MSG( m_glxVersion>0, _T("GLX version has not been initialized with wxGLCanvas::QueryGLXVersion()") );
	539	return m_glxVersion;
	540	}
	541
	542
	543	void wxGLCanvas::SwapBuffers()
	544	{
	545	GdkWindow *window = GTK_PIZZA(m_wxwindow)->bin_window;
	546	glXSwapBuffers( GDK_DISPLAY(), GDK_WINDOW_XWINDOW( window ) );
	547	}
	548
	549	void wxGLCanvas::OnSize(wxSizeEvent& WXUNUSED(event))
	550	{
	551	}
	552
	553	void wxGLCanvas::SetCurrent(const wxGLContext& RC) const
	554	{
	555	RC.SetCurrent(*this);
	556	}
	557
	558	void wxGLCanvas::SetCurrent()
	559	{
	560	if (m_glContext)
	561	m_glContext->SetCurrent(*this);
	562	}
	563
	564	void wxGLCanvas::SetColour( const wxChar *colour )
	565	{
	566	wxColour col = wxTheColourDatabase->Find(colour);
	567	if (col.Ok())
	568	{
	569	float r = (float)(col.Red()/256.0);
	570	float g = (float)(col.Green()/256.0);
	571	float b = (float)(col.Blue()/256.0);
	572	glColor3f( r, g, b);
	573	}
	574	}
	575
	576	void wxGLCanvas::OnInternalIdle()
	577	{
	578	if (/m_glContext &&/ m_exposed)
	579	{
	580	wxPaintEvent event( GetId() );
	581	event.SetEventObject( this );
	582	GetEventHandler()->ProcessEvent( event );
	583
	584	m_exposed = false;
	585	GetUpdateRegion().Clear();
	586	}
	587
	588	wxWindow::OnInternalIdle();
	589	}
	590
	591
	592
	593	//---------------------------------------------------------------------------
	594	// wxGLApp
	595	//---------------------------------------------------------------------------
	596
	597	IMPLEMENT_CLASS(wxGLApp, wxApp)
	598
	599	wxGLApp::~wxGLApp()
	600	{
	601	if (m_glFBCInfo)
	602	XFree(m_glFBCInfo);
	603	if (m_glVisualInfo)
	604	XFree(m_glVisualInfo);
	605	}
	606
	607	bool wxGLApp::InitGLVisual(int *attribList)
	608	{
	609	wxGLCanvas::QueryGLXVersion();
	610
	611	if (wxGLCanvas::GetGLXVersion() >= 13)
	612	{
	613	// GLX >= 1.3
	614	if (m_glFBCInfo)
	615	XFree(m_glFBCInfo);
	616	m_glFBCInfo = wxGLCanvas::ChooseGLFBC(attribList);
	617
	618	if (m_glFBCInfo)
	619	{
	620	if (m_glVisualInfo)
	621	XFree(m_glVisualInfo);
	622	m_glVisualInfo = glXGetVisualFromFBConfig(GDK_DISPLAY(), ((GLXFBConfig *)m_glFBCInfo)[0]);
	623	}
	624	return (m_glFBCInfo != NULL) && (m_glVisualInfo != NULL);
	625	}
	626	else
	627	{
	628	// GLX <= 1.2
	629	if (m_glVisualInfo)
	630	XFree(m_glVisualInfo);
	631	m_glVisualInfo = wxGLCanvas::ChooseGLVisual(attribList);
	632	return m_glVisualInfo != NULL;
	633	}
	634	}
	635
	636	#endif
	637	// wxUSE_GLCANVAS