src/gtk/glcanvas.cpp

   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 #if WXWIN_COMPATIBILITY_2_8
  37
  38 //-----------------------------------------------------------------------------
  39 // "realize" from m_wxwindow: used to create m_glContext implicitly
  40 //-----------------------------------------------------------------------------
  41
  42 extern "C" {
  43 static gint
  44 gtk_glwindow_realized_callback( GtkWidget *WXUNUSED(widget), wxGLCanvas *win )
  45 {
  46     win->GTKInitImplicitContext();
  47
  48     return FALSE;
  49 }
  50 }
  51
  52 #endif // WXWIN_COMPATIBILITY_2_8
  53
  54 //-----------------------------------------------------------------------------
  55 // "map" from m_wxwindow
  56 //-----------------------------------------------------------------------------
  57
  58 extern "C" {
  59 static gint
  60 gtk_glwindow_map_callback( GtkWidget * WXUNUSED(widget), wxGLCanvas *win )
  61 {
  62     wxPaintEvent event( win->GetId() );
  63     event.SetEventObject( win );
  64     win->GetEventHandler()->ProcessEvent( event );
  65
  66     win->m_exposed = false;
  67     win->GetUpdateRegion().Clear();
  68
  69     return FALSE;
  70 }
  71 }
  72
  73 //-----------------------------------------------------------------------------
  74 // "expose_event" of m_wxwindow
  75 //-----------------------------------------------------------------------------
  76
  77 extern "C" {
  78 static gboolean
  79 gtk_glwindow_expose_callback( GtkWidget *WXUNUSED(widget), GdkEventExpose *gdk_event, wxGLCanvas *win )
  80 {
  81     // don't need to install idle handler, its done from "event" signal
  82
  83     win->m_exposed = true;
  84
  85     win->GetUpdateRegion().Union( gdk_event->area.x,
  86                                   gdk_event->area.y,
  87                                   gdk_event->area.width,
  88                                   gdk_event->area.height );
  89     return false;
  90 }
  91 }
  92
  93 //-----------------------------------------------------------------------------
  94 // "size_allocate" of m_wxwindow
  95 //-----------------------------------------------------------------------------
  96
  97 extern "C" {
  98 static void
  99 gtk_glcanvas_size_callback( GtkWidget *WXUNUSED(widget), GtkAllocation* alloc, wxGLCanvas *win )
 100 {
 101     if (g_isIdle)
 102         wxapp_install_idle_handler();
 103
 104     if (!win->m_hasVMT)
 105         return;
 106
 107     wxSizeEvent event( wxSize(win->m_width,win->m_height), win->GetId() );
 108     event.SetEventObject( win );
 109     win->GetEventHandler()->ProcessEvent( event );
 110 }
 111 }
 112
 113 //---------------------------------------------------------------------------
 114 // wxGlCanvas
 115 //---------------------------------------------------------------------------
 116
 117 IMPLEMENT_CLASS(wxGLCanvas, wxWindow)
 118
 119 wxGLCanvas::wxGLCanvas(wxWindow *parent,
 120                        wxWindowID id,
 121                        const int *attribList,
 122                        const wxPoint& pos,
 123                        const wxSize& size,
 124                        long style,
 125                        const wxString& name,
 126                        const wxPalette& palette)
 127 #if WXWIN_COMPATIBILITY_2_8
 128     : m_createImplicitContext(false)
 129 #endif
 130 {
 131     Create(parent, id, pos, size, style, name, attribList, palette);
 132 }
 133
 134 #if WXWIN_COMPATIBILITY_2_8
 135
 136 wxGLCanvas::wxGLCanvas(wxWindow *parent,
 137                        wxWindowID id,
 138                        const wxPoint& pos,
 139                        const wxSize& size,
 140                        long style,
 141                        const wxString& name,
 142                        const int *attribList,
 143                        const wxPalette& palette)
 144     : m_createImplicitContext(true)
 145 {
 146     Create(parent, id, pos, size, style, name, attribList, palette);
 147 }
 148
 149 wxGLCanvas::wxGLCanvas(wxWindow *parent,
 150                        const wxGLContext *shared,
 151                        wxWindowID id,
 152                        const wxPoint& pos,
 153                        const wxSize& size,
 154                        long style,
 155                        const wxString& name,
 156                        const int *attribList,
 157                        const wxPalette& palette)
 158     : m_createImplicitContext(true)
 159 {
 160     m_sharedContext = wx_const_cast(wxGLContext *, shared);
 161
 162     Create(parent, id, pos, size, style, name, attribList, palette);
 163 }
 164
 165 wxGLCanvas::wxGLCanvas(wxWindow *parent,
 166                        const wxGLCanvas *shared,
 167                        wxWindowID id,
 168                        const wxPoint& pos, const wxSize& size,
 169                        long style, const wxString& name,
 170                        const int *attribList,
 171                        const wxPalette& palette )
 172     : m_createImplicitContext(true)
 173 {
 174     m_sharedContextOf = wx_const_cast(wxGLCanvas *, shared);
 175
 176     Create(parent, id, pos, size, style, name, attribList, palette);
 177 }
 178
 179 #endif // WXWIN_COMPATIBILITY_2_8
 180
 181 bool wxGLCanvas::Create(wxWindow *parent,
 182                         wxWindowID id,
 183                         const wxPoint& pos,
 184                         const wxSize& size,
 185                         long style,
 186                         const wxString& name,
 187                         const int *attribList,
 188                         const wxPalette& palette)
 189 {
 190     m_exposed = false;
 191     m_noExpose = true;
 192     m_nativeSizeEvent = true;
 193
 194     if ( !InitVisual(attribList) )
 195         return false;
 196
 197     XVisualInfo * const xvi = GetXVisualInfo();
 198
 199     GdkVisual *visual;
 200     GdkColormap *colormap;
 201
 202     // MR: This needs a fix for lower gtk+ versions too. Might need to rethink logic (FIXME)
 203 #if defined(__WXGTK20__) && GTK_CHECK_VERSION(2,2,0)
 204     if (!gtk_check_version(2,2,0))
 205     {
 206         wxWindow::Create( parent, id, pos, size, style, name );
 207
 208         m_glWidget = m_wxwindow;
 209
 210         GdkScreen *screen = gtk_widget_get_screen( m_glWidget );
 211         colormap = gdk_screen_get_default_colormap(screen);
 212         visual = gdk_colormap_get_visual(colormap);
 213
 214         if (GDK_VISUAL_XVISUAL(visual)->visualid != xvi->visualid)
 215         {
 216             visual = gdk_x11_screen_lookup_visual( screen, xvi->visualid );
 217             colormap = gdk_colormap_new(visual, FALSE);
 218         }
 219
 220         gtk_widget_set_colormap( m_glWidget, colormap );
 221     }
 222     else
 223 #endif // GTK+ >= 2.2
 224     {
 225         visual = gdkx_visual_get( xvi->visualid );
 226         colormap = gdk_colormap_new( visual, TRUE );
 227
 228         gtk_widget_push_colormap( colormap );
 229
 230         wxWindow::Create( parent, id, pos, size, style, name );
 231         m_glWidget = m_wxwindow;
 232     }
 233
 234     gtk_widget_set_double_buffered( m_glWidget, FALSE );
 235
 236 #if WXWIN_COMPATIBILITY_2_8
 237     g_signal_connect(m_wxwindow, "realize",       G_CALLBACK(gtk_glwindow_realized_callback), this);
 238 #endif // WXWIN_COMPATIBILITY_2_8
 239     g_signal_connect(m_wxwindow, "map",           G_CALLBACK(gtk_glwindow_map_callback),      this);
 240     g_signal_connect(m_wxwindow, "expose_event",  G_CALLBACK(gtk_glwindow_expose_callback),   this);
 241     g_signal_connect(m_widget,   "size_allocate", G_CALLBACK(gtk_glcanvas_size_callback),     this);
 242
 243     if (gtk_check_version(2,2,0) != NULL)
 244     {
 245         gtk_widget_pop_colormap();
 246     }
 247
 248 #if WXWIN_COMPATIBILITY_2_8
 249     // if our parent window is already visible, we had been realized before we
 250     // connected to the "realize" signal and hence our m_glContext hasn't been
 251     // initialized yet and we have to do it now
 252     if (GTK_WIDGET_REALIZED(m_wxwindow))
 253         gtk_glwindow_realized_callback( m_wxwindow, this );
 254 #endif // WXWIN_COMPATIBILITY_2_8
 255
 256     if (GTK_WIDGET_MAPPED(m_wxwindow))
 257         gtk_glwindow_map_callback( m_wxwindow, this );
 258
 259     return true;
 260 }
 261
 262 Window wxGLCanvas::GetXWindow() const
 263 {
 264     GdkWindow *window = GTK_PIZZA(m_wxwindow)->bin_window;
 265     return window ? GDK_WINDOW_XWINDOW(window) : 0;
 266 }
 267
 268 void wxGLCanvas::OnInternalIdle()
 269 {
 270     if (m_exposed)
 271     {
 272         wxPaintEvent event( GetId() );
 273         event.SetEventObject( this );
 274         GetEventHandler()->ProcessEvent( event );
 275
 276         m_exposed = false;
 277         GetUpdateRegion().Clear();
 278     }
 279
 280     wxWindow::OnInternalIdle();
 281 }
 282
 283 #if WXWIN_COMPATIBILITY_2_8
 284
 285 void wxGLCanvas::GTKInitImplicitContext()
 286 {
 287     if ( !m_glContext && m_createImplicitContext )
 288     {
 289         wxGLContext *share = m_sharedContext;
 290         if ( !share && m_sharedContextOf )
 291             share = m_sharedContextOf->m_glContext;
 292
 293         m_glContext = new wxGLContext(this, share);
 294     }
 295 }
 296
 297 #endif // WXWIN_COMPATIBILITY_2_8
 298
 299 #endif // wxUSE_GLCANVAS