src/gtk1/glcanvas.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/gtk1/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 // Copyright:   (c) Robert Roebling
   8 // Licence:     wxWindows licence
   9 /////////////////////////////////////////////////////////////////////////////
  10
  11 // For compilers that support precompilation, includes "wx.h".
  12 #include "wx/wxprec.h"
  13
  14 #if wxUSE_GLCANVAS
  15
  16 #include "wx/glcanvas.h"
  17
  18 #ifndef WX_PRECOMP
  19     #include "wx/app.h"
  20     #include "wx/frame.h"
  21     #include "wx/colour.h"
  22     #include "wx/module.h"
  23 #endif // WX_PRECOMP
  24
  25 extern "C"
  26 {
  27 #include "gtk/gtk.h"
  28 #include "gdk/gdk.h"
  29 #include "gdk/gdkx.h"
  30 }
  31
  32 #include "wx/gtk1/win_gtk.h"
  33 #include "wx/gtk1/private.h"
  34
  35 //-----------------------------------------------------------------------------
  36 // idle system
  37 //-----------------------------------------------------------------------------
  38
  39 extern void wxapp_install_idle_handler();
  40 extern bool g_isIdle;
  41
  42 #if WXWIN_COMPATIBILITY_2_8
  43
  44 //-----------------------------------------------------------------------------
  45 // "realize" from m_wxwindow: used to create m_glContext implicitly
  46 //-----------------------------------------------------------------------------
  47
  48 extern "C" {
  49 static gint
  50 gtk_glwindow_realized_callback( GtkWidget *WXUNUSED(widget), wxGLCanvas *win )
  51 {
  52     win->GTKInitImplicitContext();
  53
  54     return FALSE;
  55 }
  56 }
  57
  58 #endif // WXWIN_COMPATIBILITY_2_8
  59
  60 //-----------------------------------------------------------------------------
  61 // "map" from m_wxwindow
  62 //-----------------------------------------------------------------------------
  63
  64 extern "C" {
  65 static gint
  66 gtk_glwindow_map_callback( GtkWidget * WXUNUSED(widget), wxGLCanvas *win )
  67 {
  68     wxPaintEvent event( win->GetId() );
  69     event.SetEventObject( win );
  70     win->HandleWindowEvent( event );
  71
  72     win->GetUpdateRegion().Clear();
  73
  74     return FALSE;
  75 }
  76 }
  77
  78 //-----------------------------------------------------------------------------
  79 // "expose_event" of m_wxwindow
  80 //-----------------------------------------------------------------------------
  81
  82 extern "C" {
  83 static void
  84 gtk_glwindow_expose_callback( GtkWidget *WXUNUSED(widget), GdkEventExpose *gdk_event, wxGLCanvas *win )
  85 {
  86     if (g_isIdle)
  87         wxapp_install_idle_handler();
  88
  89     win->GetUpdateRegion().Union( gdk_event->area.x,
  90                                   gdk_event->area.y,
  91                                   gdk_event->area.width,
  92                                   gdk_event->area.height );
  93 }
  94 }
  95
  96 //-----------------------------------------------------------------------------
  97 // "draw" of m_wxwindow
  98 //-----------------------------------------------------------------------------
  99
 100 extern "C" {
 101 static void
 102 gtk_glwindow_draw_callback( GtkWidget *WXUNUSED(widget), GdkRectangle *rect, wxGLCanvas *win )
 103 {
 104     if (g_isIdle)
 105         wxapp_install_idle_handler();
 106
 107     win->GetUpdateRegion().Union( rect->x, rect->y,
 108                                   rect->width, rect->height );
 109 }
 110 }
 111
 112 //-----------------------------------------------------------------------------
 113 // "size_allocate" of m_wxwindow
 114 //-----------------------------------------------------------------------------
 115
 116 extern "C" {
 117 static void
 118 gtk_glcanvas_size_callback( GtkWidget *WXUNUSED(widget), GtkAllocation* alloc, wxGLCanvas *win )
 119 {
 120     if (g_isIdle)
 121         wxapp_install_idle_handler();
 122
 123     if (!win->m_hasVMT)
 124         return;
 125
 126     wxSizeEvent event( wxSize(win->m_width,win->m_height), win->GetId() );
 127     event.SetEventObject( win );
 128     win->HandleWindowEvent( event );
 129 }
 130 }
 131
 132 //---------------------------------------------------------------------------
 133 // wxGlCanvas
 134 //---------------------------------------------------------------------------
 135
 136 IMPLEMENT_CLASS(wxGLCanvas, wxWindow)
 137
 138 wxGLCanvas::wxGLCanvas(wxWindow *parent,
 139                        wxWindowID id,
 140                        const int *attribList,
 141                        const wxPoint& pos,
 142                        const wxSize& size,
 143                        long style,
 144                        const wxString& name,
 145                        const wxPalette& palette)
 146 #if WXWIN_COMPATIBILITY_2_8
 147     : m_createImplicitContext(false)
 148 #endif
 149 {
 150     Create(parent, id, pos, size, style, name, attribList, palette);
 151 }
 152
 153 #if WXWIN_COMPATIBILITY_2_8
 154
 155 wxGLCanvas::wxGLCanvas(wxWindow *parent,
 156                        wxWindowID id,
 157                        const wxPoint& pos,
 158                        const wxSize& size,
 159                        long style,
 160                        const wxString& name,
 161                        const int *attribList,
 162                        const wxPalette& palette)
 163     : m_createImplicitContext(true)
 164 {
 165     Create(parent, id, pos, size, style, name, attribList, palette);
 166 }
 167
 168 wxGLCanvas::wxGLCanvas(wxWindow *parent,
 169                        const wxGLContext *shared,
 170                        wxWindowID id,
 171                        const wxPoint& pos,
 172                        const wxSize& size,
 173                        long style,
 174                        const wxString& name,
 175                        const int *attribList,
 176                        const wxPalette& palette)
 177     : m_createImplicitContext(true)
 178 {
 179     m_sharedContext = const_cast<wxGLContext *>(shared);
 180
 181     Create(parent, id, pos, size, style, name, attribList, palette);
 182 }
 183
 184 wxGLCanvas::wxGLCanvas(wxWindow *parent,
 185                        const wxGLCanvas *shared,
 186                        wxWindowID id,
 187                        const wxPoint& pos, const wxSize& size,
 188                        long style, const wxString& name,
 189                        const int *attribList,
 190                        const wxPalette& palette )
 191     : m_createImplicitContext(true)
 192 {
 193     m_sharedContextOf = const_cast<wxGLCanvas *>(shared);
 194
 195     Create(parent, id, pos, size, style, name, attribList, palette);
 196 }
 197
 198 #endif // WXWIN_COMPATIBILITY_2_8
 199
 200 bool wxGLCanvas::Create(wxWindow *parent,
 201                         wxWindowID id,
 202                         const wxPoint& pos,
 203                         const wxSize& size,
 204                         long style,
 205                         const wxString& name,
 206                         const int *attribList,
 207                         const wxPalette& palette)
 208 {
 209     m_noExpose = true;
 210     m_nativeSizeEvent = true;
 211
 212     if ( !InitVisual(attribList) )
 213         return false;
 214
 215     GdkVisual *visual = gdkx_visual_get( GetXVisualInfo()->visualid );
 216     GdkColormap *colormap = gdk_colormap_new( visual, TRUE );
 217
 218     gtk_widget_push_colormap( colormap );
 219     gtk_widget_push_visual( visual );
 220
 221     wxWindow::Create( parent, id, pos, size, style, name );
 222     m_glWidget = m_wxwindow;
 223
 224     gtk_pizza_set_clear( GTK_PIZZA(m_wxwindow), FALSE );
 225
 226 #if WXWIN_COMPATIBILITY_2_8
 227     gtk_signal_connect( GTK_OBJECT(m_wxwindow), "realize",
 228                             GTK_SIGNAL_FUNC(gtk_glwindow_realized_callback), (gpointer) this);
 229 #endif // WXWIN_COMPATIBILITY_2_8
 230
 231     gtk_signal_connect( GTK_OBJECT(m_wxwindow), "map",
 232                             GTK_SIGNAL_FUNC(gtk_glwindow_map_callback), (gpointer) this);
 233
 234     gtk_signal_connect( GTK_OBJECT(m_wxwindow), "expose_event",
 235                             GTK_SIGNAL_FUNC(gtk_glwindow_expose_callback), (gpointer) this);
 236
 237     gtk_signal_connect( GTK_OBJECT(m_wxwindow), "draw",
 238                             GTK_SIGNAL_FUNC(gtk_glwindow_draw_callback), (gpointer) this);
 239
 240     gtk_signal_connect( GTK_OBJECT(m_widget), "size_allocate",
 241                             GTK_SIGNAL_FUNC(gtk_glcanvas_size_callback), (gpointer) this);
 242
 243     gtk_widget_pop_visual();
 244
 245     gtk_widget_pop_colormap();
 246
 247 #if WXWIN_COMPATIBILITY_2_8
 248     // if our parent window is already visible, we had been realized before we
 249     // connected to the "realize" signal and hence our m_glContext hasn't been
 250     // initialized yet and we have to do it now
 251     if (GTK_WIDGET_REALIZED(m_wxwindow))
 252         gtk_glwindow_realized_callback( m_wxwindow, this );
 253 #endif // WXWIN_COMPATIBILITY_2_8
 254
 255     if (GTK_WIDGET_MAPPED(m_wxwindow))
 256         gtk_glwindow_map_callback( m_wxwindow, this );
 257
 258     return true;
 259 }
 260
 261 Window wxGLCanvas::GetXWindow() const
 262 {
 263     GdkWindow *window = GTK_PIZZA(m_wxwindow)->bin_window;
 264     return window ? GDK_WINDOW_XWINDOW(window) : 0;
 265 }
 266
 267 void wxGLCanvas::OnInternalIdle()
 268 {
 269     if (!m_updateRegion.IsEmpty())
 270     {
 271         wxPaintEvent event( GetId() );
 272         event.SetEventObject( this );
 273         HandleWindowEvent( event );
 274
 275         GetUpdateRegion().Clear();
 276     }
 277
 278     wxWindow::OnInternalIdle();
 279 }
 280
 281 #if WXWIN_COMPATIBILITY_2_8
 282
 283 void wxGLCanvas::GTKInitImplicitContext()
 284 {
 285     if ( !m_glContext && m_createImplicitContext )
 286     {
 287         wxGLContext *share = m_sharedContext;
 288         if ( !share && m_sharedContextOf )
 289             share = m_sharedContextOf->m_glContext;
 290
 291         m_glContext = new wxGLContext(this, share);
 292     }
 293 }
 294
 295 #endif // WXWIN_COMPATIBILITY_2_8
 296
 297 #endif // wxUSE_GLCANVAS