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"
#endif // WX_PRECOMP

#include "wx/module.h"

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( bool WXUNUSED(isRGB), wxWindow *win, const wxPalette& WXUNUSED(palette) )
{
    m_window = win;
    m_widget = win->m_wxwindow;

    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, 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, 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;

    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::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;

        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 );
    }
}

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
//-----------------------------------------------------------------------------

extern "C" {
static gint
gtk_glwindow_realized_callback( GtkWidget *WXUNUSED(widget), wxGLCanvas *win )
{
    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
//-----------------------------------------------------------------------------

extern "C" {
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
//-----------------------------------------------------------------------------

extern "C" {
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 );
}
}

//-----------------------------------------------------------------------------
// "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,
                        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;
    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()
{
    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_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	#endif // WX_PRECOMP
	24
	25	#include "wx/module.h"
	26
	27	extern "C"
	28	{
	29	#include "gtk/gtk.h"
	30	#include "gdk/gdk.h"
	31	#include "gdk/gdkx.h"
	32	}
	33
	34	#include "wx/gtk/win_gtk.h"
	35	#include "wx/gtk/private.h"
	36
	37	// DLL options compatibility check:
	38	#include "wx/build.h"
	39	WX_CHECK_BUILD_OPTIONS("wxGL")
	40
	41
	42	//---------------------------------------------------------------------------
	43	// static variables
	44	//---------------------------------------------------------------------------
	45	int wxGLCanvas::m_glxVersion = 0;
	46
	47	//---------------------------------------------------------------------------
	48	// global data
	49	//---------------------------------------------------------------------------
	50
	51	XVisualInfo g_vi = (XVisualInfo) NULL;
	52
	53	//---------------------------------------------------------------------------
	54	// wxGLContext
	55	//---------------------------------------------------------------------------
	56
	57	IMPLEMENT_CLASS(wxGLContext,wxObject)
	58
	59	wxGLContext::wxGLContext( bool WXUNUSED(isRGB), wxWindow *win, const wxPalette& WXUNUSED(palette) )
	60	{
	61	m_window = win;
	62	m_widget = win->m_wxwindow;
	63
	64	wxGLCanvas gc = (wxGLCanvas) win;
	65
	66	if (wxGLCanvas::GetGLXVersion() >= 13)
	67	{
	68	// GLX >= 1.3
	69	GLXFBConfig *fbc = gc->m_fbc;
	70	wxCHECK_RET( fbc, _T("invalid GLXFBConfig for OpenGl") );
	71	m_glContext = glXCreateNewContext( GDK_DISPLAY(), fbc[0], GLX_RGBA_TYPE, None, GL_TRUE );
	72	}
	73	else
	74	{
	75	// GLX <= 1.2
	76	XVisualInfo vi = (XVisualInfo ) gc->m_vi;
	77	wxCHECK_RET( vi, _T("invalid visual for OpenGl") );
	78	m_glContext = glXCreateContext( GDK_DISPLAY(), vi, None, GL_TRUE );
	79	}
	80
	81	wxCHECK_RET( m_glContext, _T("Couldn't create OpenGl context") );
	82	}
	83
	84	wxGLContext::wxGLContext(
	85	bool WXUNUSED(isRGB), wxWindow *win,
	86	const wxPalette& WXUNUSED(palette),
	87	const wxGLContext other / for sharing display lists */
	88	)
	89	{
	90	m_window = win;
	91	m_widget = win->m_wxwindow;
	92
	93	wxGLCanvas gc = (wxGLCanvas) win;
	94
	95	if (wxGLCanvas::GetGLXVersion() >= 13)
	96	{
	97	// GLX >= 1.3
	98	GLXFBConfig *fbc = gc->m_fbc;
	99	wxCHECK_RET( fbc, _T("invalid GLXFBConfig for OpenGl") );
	100	m_glContext = glXCreateNewContext( GDK_DISPLAY(), fbc[0], GLX_RGBA_TYPE,
	101	other ? other->m_glContext : None,
	102	GL_TRUE );
	103	}
	104	else
	105	{
	106	// GLX <= 1.2
	107	XVisualInfo vi = (XVisualInfo ) gc->m_vi;
	108	wxCHECK_RET( vi, _T("invalid visual for OpenGl") );
	109	m_glContext = glXCreateContext( GDK_DISPLAY(), vi,
	110	other ? other->m_glContext : None,
	111	GL_TRUE );
	112	}
	113
	114	if ( !m_glContext )
	115	{
	116	wxFAIL_MSG( _T("Couldn't create OpenGl context") );
	117	}
	118	}
	119
	120	wxGLContext::~wxGLContext()
	121	{
	122	if (!m_glContext) return;
	123
	124	if (m_glContext == glXGetCurrentContext())
	125	{
	126	if (wxGLCanvas::GetGLXVersion() >= 13)
	127	// GLX >= 1.3
	128	glXMakeContextCurrent( GDK_DISPLAY(), None, None, NULL);
	129	else
	130	// GLX <= 1.2
	131	glXMakeCurrent( GDK_DISPLAY(), None, NULL);
	132	}
	133
	134	glXDestroyContext( GDK_DISPLAY(), m_glContext );
	135	}
	136
	137	void wxGLContext::SwapBuffers()
	138	{
	139	if (m_glContext)
	140	{
	141	GdkWindow *window = GTK_PIZZA(m_widget)->bin_window;
	142	glXSwapBuffers( GDK_DISPLAY(), GDK_WINDOW_XWINDOW( window ) );
	143	}
	144	}
	145
	146	void wxGLContext::SetCurrent()
	147	{
	148	if (m_glContext)
	149	{
	150	GdkWindow *window = GTK_PIZZA(m_widget)->bin_window;
	151
	152	if (wxGLCanvas::GetGLXVersion() >= 13)
	153	// GLX >= 1.3
	154	glXMakeContextCurrent( GDK_DISPLAY(), GDK_WINDOW_XWINDOW(window),
	155	GDK_WINDOW_XWINDOW(window), m_glContext );
	156	else
	157	// GLX <= 1.2
	158	glXMakeCurrent( GDK_DISPLAY(), GDK_WINDOW_XWINDOW(window), m_glContext );
	159	}
	160	}
	161
	162	void wxGLContext::SetColour(const wxChar *colour)
	163	{
	164	wxColour col = wxTheColourDatabase->Find(colour);
	165	if (col.Ok())
	166	{
	167	float r = (float)(col.Red()/256.0);
	168	float g = (float)(col.Green()/256.0);
	169	float b = (float)(col.Blue()/256.0);
	170	glColor3f( r, g, b);
	171	}
	172	}
	173
	174	void wxGLContext::SetupPixelFormat()
	175	{
	176	}
	177
	178	void wxGLContext::SetupPalette( const wxPalette& WXUNUSED(palette) )
	179	{
	180	}
	181
	182	wxPalette wxGLContext::CreateDefaultPalette()
	183	{
	184	return wxNullPalette;
	185	}
	186
	187	//-----------------------------------------------------------------------------
	188	// "realize" from m_wxwindow
	189	//-----------------------------------------------------------------------------
	190
	191	extern "C" {
	192	static gint
	193	gtk_glwindow_realized_callback( GtkWidget WXUNUSED(widget), wxGLCanvas win )
	194	{
	195	if ( !win->m_glContext )
	196	{
	197	wxGLContext *share = win->m_sharedContext;
	198	if ( !share && win->m_sharedContextOf )
	199	share = win->m_sharedContextOf->GetContext();
	200
	201	win->m_glContext = new wxGLContext( TRUE, win, wxNullPalette, share );
	202	}
	203
	204	return FALSE;
	205	}
	206	}
	207
	208	//-----------------------------------------------------------------------------
	209	// "map" from m_wxwindow
	210	//-----------------------------------------------------------------------------
	211
	212	extern "C" {
	213	static gint
	214	gtk_glwindow_map_callback( GtkWidget * WXUNUSED(widget), wxGLCanvas *win )
	215	{
	216	if (win->m_glContext/* && win->m_exposed*/)
	217	{
	218	wxPaintEvent event( win->GetId() );
	219	event.SetEventObject( win );
	220	win->GetEventHandler()->ProcessEvent( event );
	221
	222	win->m_exposed = false;
	223	win->GetUpdateRegion().Clear();
	224	}
	225
	226	return FALSE;
	227	}
	228	}
	229
	230	//-----------------------------------------------------------------------------
	231	// "expose_event" of m_wxwindow
	232	//-----------------------------------------------------------------------------
	233
	234	extern "C" {
	235	static void
	236	gtk_glwindow_expose_callback( GtkWidget WXUNUSED(widget), GdkEventExpose gdk_event, wxGLCanvas *win )
	237	{
	238	if (g_isIdle)
	239	wxapp_install_idle_handler();
	240
	241	win->m_exposed = true;
	242
	243	win->GetUpdateRegion().Union( gdk_event->area.x,
	244	gdk_event->area.y,
	245	gdk_event->area.width,
	246	gdk_event->area.height );
	247	}
	248	}
	249
	250	//-----------------------------------------------------------------------------
	251	// "size_allocate" of m_wxwindow
	252	//-----------------------------------------------------------------------------
	253
	254	extern "C" {
	255	static void
	256	gtk_glcanvas_size_callback( GtkWidget WXUNUSED(widget), GtkAllocation alloc, wxGLCanvas *win )
	257	{
	258	if (g_isIdle)
	259	wxapp_install_idle_handler();
	260
	261	if (!win->m_hasVMT)
	262	return;
	263
	264	wxSizeEvent event( wxSize(win->m_width,win->m_height), win->GetId() );
	265	event.SetEventObject( win );
	266	win->GetEventHandler()->ProcessEvent( event );
	267	}
	268	}
	269
	270	//---------------------------------------------------------------------------
	271	// wxGlCanvas
	272	//---------------------------------------------------------------------------
	273
	274	IMPLEMENT_CLASS(wxGLCanvas, wxWindow)
	275
	276	BEGIN_EVENT_TABLE(wxGLCanvas, wxWindow)
	277	EVT_SIZE(wxGLCanvas::OnSize)
	278	END_EVENT_TABLE()
	279
	280	wxGLCanvas::wxGLCanvas( wxWindow *parent, wxWindowID id,
	281	const wxPoint& pos, const wxSize& size,
	282	long style, const wxString& name,
	283	int *attribList,
	284	const wxPalette& palette )
	285	{
	286	Create( parent, NULL, NULL, id, pos, size, style, name, attribList, palette );
	287	}
	288
	289	wxGLCanvas::wxGLCanvas( wxWindow *parent,
	290	const wxGLContext *shared,
	291	wxWindowID id,
	292	const wxPoint& pos, const wxSize& size,
	293	long style, const wxString& name,
	294	int *attribList,
	295	const wxPalette& palette )
	296	{
	297	Create( parent, shared, NULL, id, pos, size, style, name, attribList, palette );
	298	}
	299
	300	wxGLCanvas::wxGLCanvas( wxWindow *parent,
	301	const wxGLCanvas *shared,
	302	wxWindowID id,
	303	const wxPoint& pos, const wxSize& size,
	304	long style, const wxString& name,
	305	int *attribList,
	306	const wxPalette& palette )
	307	{
	308	Create( parent, NULL, shared, id, pos, size, style, name, attribList, palette );
	309	}
	310
	311	bool wxGLCanvas::Create( wxWindow *parent,
	312	const wxGLContext *shared,
	313	const wxGLCanvas *shared_context_of,
	314	wxWindowID id,
	315	const wxPoint& pos, const wxSize& size,
	316	long style, const wxString& name,
	317	int *attribList,
	318	const wxPalette& palette)
	319	{
	320	m_sharedContext = (wxGLContext*)shared; // const_cast
	321	m_sharedContextOf = (wxGLCanvas*)shared_context_of; // const_cast
	322	m_glContext = (wxGLContext*) NULL;
	323
	324	m_exposed = false;
	325	m_noExpose = true;
	326	m_nativeSizeEvent = true;
	327	m_fbc = NULL;
	328	m_vi = NULL;
	329
	330	// to be sure the glx version is known
	331	wxGLCanvas::QueryGLXVersion();
	332
	333	if (wxGLCanvas::GetGLXVersion() >= 13)
	334	{
	335	// GLX >= 1.3 uses a GLXFBConfig
	336	GLXFBConfig * fbc = NULL;
	337	if (wxTheApp->m_glFBCInfo != NULL)
	338	{
	339	fbc = (GLXFBConfig *) wxTheApp->m_glFBCInfo;
	340	m_canFreeFBC = false; // owned by wxTheApp - don't free upon destruction
	341	}
	342	else
	343	{
	344	fbc = (GLXFBConfig *) wxGLCanvas::ChooseGLFBC(attribList);
	345	m_canFreeFBC = true;
	346	}
	347	m_fbc = fbc; // save for later use
	348	wxCHECK_MSG( m_fbc, false, _T("required FBConfig couldn't be found") );
	349	}
	350
	351	XVisualInfo *vi = NULL;
	352	if (wxTheApp->m_glVisualInfo != NULL)
	353	{
	354	vi = (XVisualInfo *)wxTheApp->m_glVisualInfo;
	355	m_canFreeVi = false; // owned by wxTheApp - don't free upon destruction
	356	}
	357	else
	358	{
	359	if (wxGLCanvas::GetGLXVersion() >= 13)
	360	// GLX >= 1.3
	361	vi = glXGetVisualFromFBConfig(GDK_DISPLAY(), m_fbc[0]);
	362	else
	363	// GLX <= 1.2
	364	vi = (XVisualInfo *) ChooseGLVisual(attribList);
	365
	366	m_canFreeVi = true;
	367	}
	368
	369	m_vi = vi; // save for later use
	370
	371	wxCHECK_MSG( m_vi, false, _T("required visual couldn't be found") );
	372	GdkVisual *visual;
	373	GdkColormap *colormap;
	374
	375	// MR: This needs a fix for lower gtk+ versions too. Might need to rethink logic (FIXME)
	376	#if defined(__WXGTK20__) && GTK_CHECK_VERSION(2,2,0)
	377	if (!gtk_check_version(2,2,0))
	378	{
	379	wxWindow::Create( parent, id, pos, size, style, name );
	380
	381	m_glWidget = m_wxwindow;
	382
	383	GdkScreen *screen = gtk_widget_get_screen( m_glWidget );
	384	colormap = gdk_screen_get_default_colormap(screen);
	385	visual = gdk_colormap_get_visual(colormap);
	386
	387	if (GDK_VISUAL_XVISUAL(visual)->visualid != vi->visualid)
	388	{
	389	visual = gdk_x11_screen_lookup_visual( screen, vi->visualid );
	390	colormap = gdk_colormap_new(visual, FALSE);
	391	}
	392
	393	gtk_widget_set_colormap( m_glWidget, colormap );
	394	}
	395	else
	396	#endif
	397	{
	398	visual = gdkx_visual_get( vi->visualid );
	399	colormap = gdk_colormap_new( visual, TRUE );
	400
	401	gtk_widget_push_colormap( colormap );
	402
	403	wxWindow::Create( parent, id, pos, size, style, name );
	404	m_glWidget = m_wxwindow;
	405	}
	406
	407	gtk_widget_set_double_buffered( m_glWidget, FALSE );
	408
	409	g_signal_connect (m_wxwindow, "realize",
	410	G_CALLBACK (gtk_glwindow_realized_callback),
	411	this);
	412	g_signal_connect (m_wxwindow, "map",
	413	G_CALLBACK (gtk_glwindow_map_callback),
	414	this);
	415	g_signal_connect (m_wxwindow, "expose_event",
	416	G_CALLBACK (gtk_glwindow_expose_callback),
	417	this);
	418	g_signal_connect (m_widget, "size_allocate",
	419	G_CALLBACK (gtk_glcanvas_size_callback),
	420	this);
	421
	422	if (gtk_check_version(2,2,0) != NULL)
	423	{
	424	gtk_widget_pop_colormap();
	425	}
	426
	427	// if our parent window is already visible, we had been realized before we
	428	// connected to the "realize" signal and hence our m_glContext hasn't been
	429	// initialized yet and we have to do it now
	430	if (GTK_WIDGET_REALIZED(m_wxwindow))
	431	gtk_glwindow_realized_callback( m_wxwindow, this );
	432
	433	if (GTK_WIDGET_MAPPED(m_wxwindow))
	434	gtk_glwindow_map_callback( m_wxwindow, this );
	435
	436	return true;
	437	}
	438
	439	wxGLCanvas::~wxGLCanvas()
	440	{
	441	GLXFBConfig * fbc = (GLXFBConfig *) m_fbc;
	442	if (fbc && m_canFreeFBC)
	443	XFree( fbc );
	444
	445	XVisualInfo vi = (XVisualInfo ) m_vi;
	446	if (vi && m_canFreeVi)
	447	XFree( vi );
	448
	449	delete m_glContext;
	450	}
	451
	452	void* wxGLCanvas::ChooseGLVisual(int *attribList)
	453	{
	454	int data[512];
	455	GetGLAttribListFromWX( attribList, data );
	456	attribList = (int*) data;
	457
	458	Display *dpy = GDK_DISPLAY();
	459
	460	return glXChooseVisual( dpy, DefaultScreen(dpy), attribList );
	461	}
	462
	463	void* wxGLCanvas::ChooseGLFBC(int *attribList)
	464	{
	465	int data[512];
	466	GetGLAttribListFromWX( attribList, data );
	467	attribList = (int*) data;
	468
	469	int returned;
	470	return glXChooseFBConfig( GDK_DISPLAY(), DefaultScreen(GDK_DISPLAY()),
	471	attribList, &returned );
	472	}
	473
	474
	475	void wxGLCanvas::GetGLAttribListFromWX(int wx_attribList, int gl_attribList )
	476	{
	477	if (!wx_attribList)
	478	{
	479	if (wxGLCanvas::GetGLXVersion() >= 13)
	480	// leave GLX >= 1.3 choose the default attributes
	481	gl_attribList[0] = 0;
	482	else
	483	{
	484	int i = 0;
	485	// default settings if attriblist = 0
	486	gl_attribList[i++] = GLX_RGBA;
	487	gl_attribList[i++] = GLX_DOUBLEBUFFER;
	488	gl_attribList[i++] = GLX_DEPTH_SIZE; gl_attribList[i++] = 1;
	489	gl_attribList[i++] = GLX_RED_SIZE; gl_attribList[i++] = 1;
	490	gl_attribList[i++] = GLX_GREEN_SIZE; gl_attribList[i++] = 1;
	491	gl_attribList[i++] = GLX_BLUE_SIZE; gl_attribList[i++] = 1;
	492	gl_attribList[i++] = GLX_ALPHA_SIZE; gl_attribList[i++] = 0;
	493	gl_attribList[i++] = None;
	494	}
	495	}
	496	else
	497	{
	498	int arg=0, p=0;
	499	while( (wx_attribList[arg]!=0) && (p<510) )
	500	{
	501	switch( wx_attribList[arg++] )
	502	{
	503	case WX_GL_RGBA:
	504	if (wxGLCanvas::GetGLXVersion() <= 12)
	505	// for GLX >= 1.3, GLX_RGBA is useless (setting this flags will crash on most opengl implm)
	506	gl_attribList[p++] = GLX_RGBA;
	507	break;
	508	case WX_GL_BUFFER_SIZE:
	509	gl_attribList[p++] = GLX_BUFFER_SIZE;
	510	gl_attribList[p++] = wx_attribList[arg++];
	511	break;
	512	case WX_GL_LEVEL:
	513	gl_attribList[p++] = GLX_LEVEL;
	514	gl_attribList[p++] = wx_attribList[arg++];
	515	break;
	516	case WX_GL_DOUBLEBUFFER:
	517	if (wxGLCanvas::GetGLXVersion() <= 12)
	518	gl_attribList[p++] = GLX_DOUBLEBUFFER;
	519	else
	520	// for GLX >= 1.3, GLX_DOUBLEBUFFER format is different (1 <=> True)
	521	// it seems this flag is useless for some hardware opengl implementation.
	522	// but for Mesa 6.2.1, this flag is used so don't ignore it.
	523	gl_attribList[p++] = GLX_DOUBLEBUFFER;
	524	gl_attribList[p++] = 1;
	525	break;
	526	case WX_GL_STEREO:
	527	gl_attribList[p++] = GLX_STEREO;
	528	break;
	529	case WX_GL_AUX_BUFFERS:
	530	gl_attribList[p++] = GLX_AUX_BUFFERS;
	531	gl_attribList[p++] = wx_attribList[arg++];
	532	break;
	533	case WX_GL_MIN_RED:
	534	gl_attribList[p++] = GLX_RED_SIZE;
	535	gl_attribList[p++] = wx_attribList[arg++];
	536	break;
	537	case WX_GL_MIN_GREEN:
	538	gl_attribList[p++] = GLX_GREEN_SIZE;
	539	gl_attribList[p++] = wx_attribList[arg++];
	540	break;
	541	case WX_GL_MIN_BLUE:
	542	gl_attribList[p++] = GLX_BLUE_SIZE;
	543	gl_attribList[p++] = wx_attribList[arg++];
	544	break;
	545	case WX_GL_MIN_ALPHA:
	546	gl_attribList[p++] = GLX_ALPHA_SIZE;
	547	gl_attribList[p++] = wx_attribList[arg++];
	548	break;
	549	case WX_GL_DEPTH_SIZE:
	550	gl_attribList[p++] = GLX_DEPTH_SIZE;
	551	gl_attribList[p++] = wx_attribList[arg++];
	552	break;
	553	case WX_GL_STENCIL_SIZE:
	554	gl_attribList[p++] = GLX_STENCIL_SIZE;
	555	gl_attribList[p++] = wx_attribList[arg++];
	556	break;
	557	case WX_GL_MIN_ACCUM_RED:
	558	gl_attribList[p++] = GLX_ACCUM_RED_SIZE;
	559	gl_attribList[p++] = wx_attribList[arg++];
	560	break;
	561	case WX_GL_MIN_ACCUM_GREEN:
	562	gl_attribList[p++] = GLX_ACCUM_GREEN_SIZE;
	563	gl_attribList[p++] = wx_attribList[arg++];
	564	break;
	565	case WX_GL_MIN_ACCUM_BLUE:
	566	gl_attribList[p++] = GLX_ACCUM_BLUE_SIZE;
	567	gl_attribList[p++] = wx_attribList[arg++];
	568	break;
	569	case WX_GL_MIN_ACCUM_ALPHA:
	570	gl_attribList[p++] = GLX_ACCUM_ALPHA_SIZE;
	571	gl_attribList[p++] = wx_attribList[arg++];
	572	break;
	573	default:
	574	break;
	575	}
	576	}
	577
	578	gl_attribList[p] = 0;
	579	}
	580	}
	581
	582	void wxGLCanvas::QueryGLXVersion()
	583	{
	584	if (m_glxVersion == 0)
	585	{
	586	// check the GLX version
	587	int glxMajorVer, glxMinorVer;
	588	bool ok = glXQueryVersion(GDK_DISPLAY(), &glxMajorVer, &glxMinorVer);
	589	wxASSERT_MSG( ok, _T("GLX version not found") );
	590	if (!ok)
	591	m_glxVersion = 10; // 1.0 by default
	592	else
	593	m_glxVersion = glxMajorVer*10 + glxMinorVer;
	594	}
	595	}
	596
	597	int wxGLCanvas::GetGLXVersion()
	598	{
	599	wxASSERT_MSG( m_glxVersion>0, _T("GLX version has not been initialized with wxGLCanvas::QueryGLXVersion()") );
	600	return m_glxVersion;
	601	}
	602
	603
	604	void wxGLCanvas::SwapBuffers()
	605	{
	606	if (m_glContext)
	607	m_glContext->SwapBuffers();
	608	}
	609
	610	void wxGLCanvas::OnSize(wxSizeEvent& WXUNUSED(event))
	611	{
	612	}
	613
	614	void wxGLCanvas::SetCurrent()
	615	{
	616	if (m_glContext)
	617	m_glContext->SetCurrent();
	618	}
	619
	620	void wxGLCanvas::SetColour( const wxChar *colour )
	621	{
	622	if (m_glContext)
	623	m_glContext->SetColour( colour );
	624	}
	625
	626	void wxGLCanvas::OnInternalIdle()
	627	{
	628	if (m_glContext && m_exposed)
	629	{
	630	wxPaintEvent event( GetId() );
	631	event.SetEventObject( this );
	632	GetEventHandler()->ProcessEvent( event );
	633
	634	m_exposed = false;
	635	GetUpdateRegion().Clear();
	636	}
	637
	638	wxWindow::OnInternalIdle();
	639	}
	640
	641
	642
	643	//---------------------------------------------------------------------------
	644	// wxGLApp
	645	//---------------------------------------------------------------------------
	646
	647	IMPLEMENT_CLASS(wxGLApp, wxApp)
	648
	649	wxGLApp::~wxGLApp()
	650	{
	651	if (m_glFBCInfo)
	652	XFree(m_glFBCInfo);
	653	if (m_glVisualInfo)
	654	XFree(m_glVisualInfo);
	655	}
	656
	657	bool wxGLApp::InitGLVisual(int *attribList)
	658	{
	659	wxGLCanvas::QueryGLXVersion();
	660
	661	if (wxGLCanvas::GetGLXVersion() >= 13)
	662	{
	663	// GLX >= 1.3
	664	if (m_glFBCInfo)
	665	XFree(m_glFBCInfo);
	666	m_glFBCInfo = wxGLCanvas::ChooseGLFBC(attribList);
	667
	668	if (m_glFBCInfo)
	669	{
	670	if (m_glVisualInfo)
	671	XFree(m_glVisualInfo);
	672	m_glVisualInfo = glXGetVisualFromFBConfig(GDK_DISPLAY(), ((GLXFBConfig *)m_glFBCInfo)[0]);
	673	}
	674	return (m_glFBCInfo != NULL) && (m_glVisualInfo != NULL);
	675	}
	676	else
	677	{
	678	// GLX <= 1.2
	679	if (m_glVisualInfo)
	680	XFree(m_glVisualInfo);
	681	m_glVisualInfo = wxGLCanvas::ChooseGLVisual(attribList);
	682	return m_glVisualInfo != NULL;
	683	}
	684	}
	685
	686	#endif
	687	// wxUSE_GLCANVAS