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 // 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/gtk1/win_gtk.h"
  34 #include "wx/gtk1/private.h"
  35
  36 //-----------------------------------------------------------------------------
  37 // idle system
  38 //-----------------------------------------------------------------------------
  39
  40 extern void wxapp_install_idle_handler();
  41 extern bool g_isIdle;
  42
  43 #if WXWIN_COMPATIBILITY_2_8
  44
  45 //-----------------------------------------------------------------------------
  46 // "realize" from m_wxwindow: used to create m_glContext implicitly
  47 //-----------------------------------------------------------------------------
  48
  49 extern "C" {
  50 static gint
  51 gtk_glwindow_realized_callback( GtkWidget *WXUNUSED(widget), wxGLCanvas *win )
  52 {
  53     win->GTKInitImplicitContext();
  54
  55     return FALSE;
  56 }
  57 }
  58
  59 #endif // WXWIN_COMPATIBILITY_2_8
  60
  61 //-----------------------------------------------------------------------------
  62 // "map" from m_wxwindow
  63 //-----------------------------------------------------------------------------
  64
  65 extern "C" {
  66 static gint
  67 gtk_glwindow_map_callback( GtkWidget * WXUNUSED(widget), wxGLCanvas *win )
  68 {
  69     wxPaintEvent event( win->GetId() );
  70     event.SetEventObject( win );
  71     win->HandleWindowEvent( event );
  72
  73     win->GetUpdateRegion().Clear();
  74
  75     return FALSE;
  76 }
  77 }
  78
  79 //-----------------------------------------------------------------------------
  80 // "expose_event" of m_wxwindow
  81 //-----------------------------------------------------------------------------
  82
  83 extern "C" {
  84 static void
  85 gtk_glwindow_expose_callback( GtkWidget *WXUNUSED(widget), GdkEventExpose *gdk_event, wxGLCanvas *win )
  86 {
  87     if (g_isIdle)
  88         wxapp_install_idle_handler();
  89
  90     win->GetUpdateRegion().Union( gdk_event->area.x,
  91                                   gdk_event->area.y,
  92                                   gdk_event->area.width,
  93                                   gdk_event->area.height );
  94 }
  95 }
  96
  97 //-----------------------------------------------------------------------------
  98 // "draw" of m_wxwindow
  99 //-----------------------------------------------------------------------------
 100
 101 extern "C" {
 102 static void
 103 gtk_glwindow_draw_callback( GtkWidget *WXUNUSED(widget), GdkRectangle *rect, wxGLCanvas *win )
 104 {
 105     if (g_isIdle)
 106         wxapp_install_idle_handler();
 107
 108     win->GetUpdateRegion().Union( rect->x, rect->y,
 109                                   rect->width, rect->height );
 110 }
 111 }
 112
 113 //-----------------------------------------------------------------------------
 114 // "size_allocate" of m_wxwindow
 115 //-----------------------------------------------------------------------------
 116
 117 extern "C" {
 118 static void
 119 gtk_glcanvas_size_callback( GtkWidget *WXUNUSED(widget), GtkAllocation* alloc, wxGLCanvas *win )
 120 {
 121     if (g_isIdle)
 122         wxapp_install_idle_handler();
 123
 124     if (!win->m_hasVMT)
 125         return;
 126
 127     wxSizeEvent event( wxSize(win->m_width,win->m_height), win->GetId() );
 128     event.SetEventObject( win );
 129     win->HandleWindowEvent( event );
 130 }
 131 }
 132
 133 //---------------------------------------------------------------------------
 134 // wxGlCanvas
 135 //---------------------------------------------------------------------------
 136
 137 IMPLEMENT_CLASS(wxGLCanvas, wxWindow)
 138
 139 wxGLCanvas::wxGLCanvas(wxWindow *parent,
 140                        wxWindowID id,
 141                        const int *attribList,
 142                        const wxPoint& pos,
 143                        const wxSize& size,
 144                        long style,
 145                        const wxString& name,
 146                        const wxPalette& palette)
 147 #if WXWIN_COMPATIBILITY_2_8
 148     : m_createImplicitContext(false)
 149 #endif
 150 {
 151     Create(parent, id, pos, size, style, name, attribList, palette);
 152 }
 153
 154 #if WXWIN_COMPATIBILITY_2_8
 155
 156 wxGLCanvas::wxGLCanvas(wxWindow *parent,
 157                        wxWindowID id,
 158                        const wxPoint& pos,
 159                        const wxSize& size,
 160                        long style,
 161                        const wxString& name,
 162                        const int *attribList,
 163                        const wxPalette& palette)
 164     : m_createImplicitContext(true)
 165 {
 166     Create(parent, id, pos, size, style, name, attribList, palette);
 167 }
 168
 169 wxGLCanvas::wxGLCanvas(wxWindow *parent,
 170                        const wxGLContext *shared,
 171                        wxWindowID id,
 172                        const wxPoint& pos,
 173                        const wxSize& size,
 174                        long style,
 175                        const wxString& name,
 176                        const int *attribList,
 177                        const wxPalette& palette)
 178     : m_createImplicitContext(true)
 179 {
 180     m_sharedContext = const_cast<wxGLContext *>(shared);
 181
 182     Create(parent, id, pos, size, style, name, attribList, palette);
 183 }
 184
 185 wxGLCanvas::wxGLCanvas(wxWindow *parent,
 186                        const wxGLCanvas *shared,
 187                        wxWindowID id,
 188                        const wxPoint& pos, const wxSize& size,
 189                        long style, const wxString& name,
 190                        const int *attribList,
 191                        const wxPalette& palette )
 192     : m_createImplicitContext(true)
 193 {
 194     m_sharedContextOf = const_cast<wxGLCanvas *>(shared);
 195
 196     Create(parent, id, pos, size, style, name, attribList, palette);
 197 }
 198
 199 #endif // WXWIN_COMPATIBILITY_2_8
 200
 201 bool wxGLCanvas::Create(wxWindow *parent,
 202                         wxWindowID id,
 203                         const wxPoint& pos,
 204                         const wxSize& size,
 205                         long style,
 206                         const wxString& name,
 207                         const int *attribList,
 208                         const wxPalette& palette)
 209 {
 210     m_noExpose = true;
 211     m_nativeSizeEvent = true;
 212
 213     if ( !InitVisual(attribList) )
 214         return false;
 215
 216     GdkVisual *visual = gdkx_visual_get( GetXVisualInfo()->visualid );
 217     GdkColormap *colormap = gdk_colormap_new( visual, TRUE );
 218
 219     gtk_widget_push_colormap( colormap );
 220     gtk_widget_push_visual( visual );
 221
 222     wxWindow::Create( parent, id, pos, size, style, name );
 223     m_glWidget = m_wxwindow;
 224
 225     gtk_pizza_set_clear( GTK_PIZZA(m_wxwindow), FALSE );
 226
 227 #if WXWIN_COMPATIBILITY_2_8
 228     gtk_signal_connect( GTK_OBJECT(m_wxwindow), "realize",
 229                             GTK_SIGNAL_FUNC(gtk_glwindow_realized_callback), (gpointer) this);
 230 #endif // WXWIN_COMPATIBILITY_2_8
 231
 232     gtk_signal_connect( GTK_OBJECT(m_wxwindow), "map",
 233                             GTK_SIGNAL_FUNC(gtk_glwindow_map_callback), (gpointer) this);
 234
 235     gtk_signal_connect( GTK_OBJECT(m_wxwindow), "expose_event",
 236                             GTK_SIGNAL_FUNC(gtk_glwindow_expose_callback), (gpointer) this);
 237
 238     gtk_signal_connect( GTK_OBJECT(m_wxwindow), "draw",
 239                             GTK_SIGNAL_FUNC(gtk_glwindow_draw_callback), (gpointer) this);
 240
 241     gtk_signal_connect( GTK_OBJECT(m_widget), "size_allocate",
 242                             GTK_SIGNAL_FUNC(gtk_glcanvas_size_callback), (gpointer) this);
 243
 244     gtk_widget_pop_visual();
 245
 246     gtk_widget_pop_colormap();
 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_updateRegion.IsEmpty())
 271     {
 272         wxPaintEvent event( GetId() );
 273         event.SetEventObject( this );
 274         HandleWindowEvent( event );
 275
 276         GetUpdateRegion().Clear();
 277     }
 278
 279     wxWindow::OnInternalIdle();
 280 }
 281
 282 #if WXWIN_COMPATIBILITY_2_8
 283
 284 void wxGLCanvas::GTKInitImplicitContext()
 285 {
 286     if ( !m_glContext && m_createImplicitContext )
 287     {
 288         wxGLContext *share = m_sharedContext;
 289         if ( !share && m_sharedContextOf )
 290             share = m_sharedContextOf->m_glContext;
 291
 292         m_glContext = new wxGLContext(this, share);
 293     }
 294 }
 295
 296 #endif // WXWIN_COMPATIBILITY_2_8
 297
 298 #endif // wxUSE_GLCANVAS