| 1 | ///////////////////////////////////////////////////////////////////////////// |
| 2 | // Name: glcanvas.cpp |
| 3 | // Purpose: wxGLCanvas, for using OpenGL/Mesa with wxWindows 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 | #ifdef __GNUG__ |
| 13 | #pragma implementation "glcanvas.h" |
| 14 | #endif |
| 15 | |
| 16 | #include "wx/setup.h" |
| 17 | |
| 18 | #if wxUSE_GLCANVAS |
| 19 | |
| 20 | #include "wx/glcanvas.h" |
| 21 | |
| 22 | #include "wx/frame.h" |
| 23 | #include "wx/colour.h" |
| 24 | #include "wx/module.h" |
| 25 | #include "wx/app.h" |
| 26 | |
| 27 | extern "C" { |
| 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 | |
| 35 | //--------------------------------------------------------------------------- |
| 36 | // global data |
| 37 | //--------------------------------------------------------------------------- |
| 38 | |
| 39 | XVisualInfo *g_vi = (XVisualInfo*) NULL; |
| 40 | |
| 41 | //----------------------------------------------------------------------------- |
| 42 | // idle system |
| 43 | //----------------------------------------------------------------------------- |
| 44 | |
| 45 | extern void wxapp_install_idle_handler(); |
| 46 | extern bool g_isIdle; |
| 47 | |
| 48 | //--------------------------------------------------------------------------- |
| 49 | // wxGLContext |
| 50 | //--------------------------------------------------------------------------- |
| 51 | |
| 52 | IMPLEMENT_CLASS(wxGLContext,wxObject) |
| 53 | |
| 54 | wxGLContext::wxGLContext( bool WXUNUSED(isRGB), wxWindow *win, const wxPalette& WXUNUSED(palette) ) |
| 55 | { |
| 56 | m_window = win; |
| 57 | m_widget = win->m_wxwindow; |
| 58 | |
| 59 | wxGLCanvas *gc = (wxGLCanvas*) win; |
| 60 | XVisualInfo *vi = (XVisualInfo *) gc->m_vi; |
| 61 | |
| 62 | wxCHECK_RET( vi, "invalid visual for OpenGl" ); |
| 63 | |
| 64 | m_glContext = glXCreateContext( GDK_DISPLAY(), vi, None, GL_TRUE ); |
| 65 | |
| 66 | wxCHECK_RET( m_glContext, "Couldn't create OpenGl context" ); |
| 67 | } |
| 68 | |
| 69 | wxGLContext::wxGLContext( |
| 70 | bool WXUNUSED(isRGB), wxWindow *win, |
| 71 | const wxPalette& WXUNUSED(palette), |
| 72 | const wxGLContext *other /* for sharing display lists */ |
| 73 | ) |
| 74 | { |
| 75 | m_window = win; |
| 76 | m_widget = win->m_wxwindow; |
| 77 | |
| 78 | wxGLCanvas *gc = (wxGLCanvas*) win; |
| 79 | XVisualInfo *vi = (XVisualInfo *) gc->m_vi; |
| 80 | |
| 81 | wxCHECK_RET( vi, "invalid visual for OpenGl" ); |
| 82 | |
| 83 | if( other != 0 ) |
| 84 | m_glContext = glXCreateContext( GDK_DISPLAY(), vi, other->m_glContext, GL_TRUE ); |
| 85 | else |
| 86 | m_glContext = glXCreateContext( GDK_DISPLAY(), vi, None, GL_TRUE ); |
| 87 | |
| 88 | wxCHECK_RET( m_glContext, "Couldn't create OpenGl context" ); |
| 89 | } |
| 90 | |
| 91 | wxGLContext::~wxGLContext() |
| 92 | { |
| 93 | if (!m_glContext) return; |
| 94 | |
| 95 | if (m_glContext == glXGetCurrentContext()) |
| 96 | { |
| 97 | glXMakeCurrent( GDK_DISPLAY(), None, NULL); |
| 98 | } |
| 99 | |
| 100 | glXDestroyContext( GDK_DISPLAY(), m_glContext ); |
| 101 | } |
| 102 | |
| 103 | void wxGLContext::SwapBuffers() |
| 104 | { |
| 105 | if (m_glContext) |
| 106 | { |
| 107 | GdkWindow *window = GTK_PIZZA(m_widget)->bin_window; |
| 108 | glXSwapBuffers( GDK_DISPLAY(), GDK_WINDOW_XWINDOW( window ) ); |
| 109 | } |
| 110 | } |
| 111 | |
| 112 | void wxGLContext::SetCurrent() |
| 113 | { |
| 114 | if (m_glContext) |
| 115 | { |
| 116 | GdkWindow *window = GTK_PIZZA(m_widget)->bin_window; |
| 117 | glXMakeCurrent( GDK_DISPLAY(), GDK_WINDOW_XWINDOW(window), m_glContext ); |
| 118 | } |
| 119 | } |
| 120 | |
| 121 | void wxGLContext::SetColour(const char *colour) |
| 122 | { |
| 123 | float r = 0.0; |
| 124 | float g = 0.0; |
| 125 | float b = 0.0; |
| 126 | wxColour *col = wxTheColourDatabase->FindColour(colour); |
| 127 | if (col) |
| 128 | { |
| 129 | r = (float)(col->Red()/256.0); |
| 130 | g = (float)(col->Green()/256.0); |
| 131 | b = (float)(col->Blue()/256.0); |
| 132 | glColor3f( r, g, b); |
| 133 | } |
| 134 | } |
| 135 | |
| 136 | void wxGLContext::SetupPixelFormat() |
| 137 | { |
| 138 | } |
| 139 | |
| 140 | void wxGLContext::SetupPalette( const wxPalette& WXUNUSED(palette) ) |
| 141 | { |
| 142 | } |
| 143 | |
| 144 | wxPalette wxGLContext::CreateDefaultPalette() |
| 145 | { |
| 146 | return wxNullPalette; |
| 147 | } |
| 148 | |
| 149 | //----------------------------------------------------------------------------- |
| 150 | // "realize" from m_wxwindow |
| 151 | //----------------------------------------------------------------------------- |
| 152 | |
| 153 | static gint |
| 154 | gtk_glwindow_realized_callback( GtkWidget * WXUNUSED(widget), wxGLCanvas *win ) |
| 155 | { |
| 156 | wxGLContext *share= win->m_sharedContext; |
| 157 | if (share==NULL && win->m_sharedContextOf) share=win->m_sharedContextOf->GetContext(); |
| 158 | |
| 159 | win->m_glContext = new wxGLContext( TRUE, win, wxNullPalette, share ); |
| 160 | |
| 161 | return FALSE; |
| 162 | } |
| 163 | |
| 164 | //----------------------------------------------------------------------------- |
| 165 | // "map" from m_wxwindow |
| 166 | //----------------------------------------------------------------------------- |
| 167 | |
| 168 | static gint |
| 169 | gtk_glwindow_map_callback( GtkWidget * WXUNUSED(widget), wxGLCanvas *win ) |
| 170 | { |
| 171 | if (win->m_glContext/* && win->m_exposed*/) |
| 172 | { |
| 173 | wxPaintEvent event( win->GetId() ); |
| 174 | event.SetEventObject( win ); |
| 175 | win->GetEventHandler()->ProcessEvent( event ); |
| 176 | |
| 177 | win->m_exposed = FALSE; |
| 178 | win->GetUpdateRegion().Clear(); |
| 179 | } |
| 180 | |
| 181 | return FALSE; |
| 182 | } |
| 183 | |
| 184 | //----------------------------------------------------------------------------- |
| 185 | // "expose_event" of m_wxwindow |
| 186 | //----------------------------------------------------------------------------- |
| 187 | |
| 188 | static void |
| 189 | gtk_glwindow_expose_callback( GtkWidget *WXUNUSED(widget), GdkEventExpose *gdk_event, wxGLCanvas *win ) |
| 190 | { |
| 191 | if (g_isIdle) |
| 192 | wxapp_install_idle_handler(); |
| 193 | |
| 194 | win->m_exposed = TRUE; |
| 195 | |
| 196 | win->GetUpdateRegion().Union( gdk_event->area.x, |
| 197 | gdk_event->area.y, |
| 198 | gdk_event->area.width, |
| 199 | gdk_event->area.height ); |
| 200 | } |
| 201 | |
| 202 | //----------------------------------------------------------------------------- |
| 203 | // "draw" of m_wxwindow |
| 204 | //----------------------------------------------------------------------------- |
| 205 | |
| 206 | static void |
| 207 | gtk_glwindow_draw_callback( GtkWidget *WXUNUSED(widget), GdkRectangle *rect, wxGLCanvas *win ) |
| 208 | { |
| 209 | if (g_isIdle) |
| 210 | wxapp_install_idle_handler(); |
| 211 | |
| 212 | win->m_exposed = TRUE; |
| 213 | |
| 214 | win->GetUpdateRegion().Union( rect->x, rect->y, |
| 215 | rect->width, rect->height ); |
| 216 | } |
| 217 | |
| 218 | //----------------------------------------------------------------------------- |
| 219 | // "size_allocate" of m_wxwindow |
| 220 | //----------------------------------------------------------------------------- |
| 221 | |
| 222 | static void |
| 223 | gtk_glcanvas_size_callback( GtkWidget *WXUNUSED(widget), GtkAllocation* alloc, wxGLCanvas *win ) |
| 224 | { |
| 225 | if (g_isIdle) |
| 226 | wxapp_install_idle_handler(); |
| 227 | |
| 228 | if (!win->m_hasVMT) |
| 229 | return; |
| 230 | |
| 231 | wxSizeEvent event( wxSize(win->m_width,win->m_height), win->GetId() ); |
| 232 | event.SetEventObject( win ); |
| 233 | win->GetEventHandler()->ProcessEvent( event ); |
| 234 | } |
| 235 | |
| 236 | //--------------------------------------------------------------------------- |
| 237 | // wxGlCanvas |
| 238 | //--------------------------------------------------------------------------- |
| 239 | |
| 240 | IMPLEMENT_CLASS(wxGLCanvas, wxScrolledWindow) |
| 241 | |
| 242 | BEGIN_EVENT_TABLE(wxGLCanvas, wxScrolledWindow) |
| 243 | EVT_SIZE(wxGLCanvas::OnSize) |
| 244 | END_EVENT_TABLE() |
| 245 | |
| 246 | wxGLCanvas::wxGLCanvas( wxWindow *parent, wxWindowID id, |
| 247 | const wxPoint& pos, const wxSize& size, |
| 248 | long style, const wxString& name, |
| 249 | int *attribList, |
| 250 | const wxPalette& palette ) |
| 251 | { |
| 252 | Create( parent, NULL, NULL, id, pos, size, style, name, attribList, palette ); |
| 253 | } |
| 254 | |
| 255 | wxGLCanvas::wxGLCanvas( wxWindow *parent, |
| 256 | const wxGLContext *shared, |
| 257 | wxWindowID id, |
| 258 | const wxPoint& pos, const wxSize& size, |
| 259 | long style, const wxString& name, |
| 260 | int *attribList, |
| 261 | const wxPalette& palette ) |
| 262 | { |
| 263 | Create( parent, shared, NULL, id, pos, size, style, name, attribList, palette ); |
| 264 | } |
| 265 | |
| 266 | wxGLCanvas::wxGLCanvas( wxWindow *parent, |
| 267 | const wxGLCanvas *shared, |
| 268 | wxWindowID id, |
| 269 | const wxPoint& pos, const wxSize& size, |
| 270 | long style, const wxString& name, |
| 271 | int *attribList, |
| 272 | const wxPalette& palette ) |
| 273 | { |
| 274 | Create( parent, NULL, shared, id, pos, size, style, name, attribList, palette ); |
| 275 | } |
| 276 | |
| 277 | bool wxGLCanvas::Create( wxWindow *parent, |
| 278 | const wxGLContext *shared, |
| 279 | const wxGLCanvas *shared_context_of, |
| 280 | wxWindowID id, |
| 281 | const wxPoint& pos, const wxSize& size, |
| 282 | long style, const wxString& name, |
| 283 | int *attribList, |
| 284 | const wxPalette& palette) |
| 285 | { |
| 286 | int data[512]; |
| 287 | m_sharedContext = (wxGLContext*)shared; // const_cast |
| 288 | m_sharedContextOf = (wxGLCanvas*)shared_context_of; // const_cast |
| 289 | m_glContext = (wxGLContext*) NULL; |
| 290 | |
| 291 | m_exposed = FALSE; |
| 292 | m_noExpose = TRUE; |
| 293 | m_nativeSizeEvent = TRUE; |
| 294 | |
| 295 | if (!attribList) |
| 296 | { |
| 297 | // default settings if attriblist = 0 |
| 298 | data[0] = GLX_RGBA; |
| 299 | data[1] = GLX_DOUBLEBUFFER; |
| 300 | data[2] = GLX_DEPTH_SIZE; data[3] = 1; |
| 301 | data[4] = GLX_RED_SIZE; data[5] = 1; |
| 302 | data[6] = GLX_GREEN_SIZE; data[7] = 1; |
| 303 | data[8] = GLX_BLUE_SIZE; data[9] = 1; |
| 304 | data[10] = GLX_ALPHA_SIZE; data[11] = 0; |
| 305 | data[12] = None; |
| 306 | |
| 307 | attribList = (int*) data; |
| 308 | } |
| 309 | else |
| 310 | { |
| 311 | int arg=0, p=0; |
| 312 | |
| 313 | while( (attribList[arg]!=0) && (p<510) ) |
| 314 | { |
| 315 | switch( attribList[arg++] ) |
| 316 | { |
| 317 | case WX_GL_RGBA: data[p++] = GLX_RGBA; break; |
| 318 | case WX_GL_BUFFER_SIZE: |
| 319 | data[p++]=GLX_BUFFER_SIZE; data[p++]=attribList[arg++]; break; |
| 320 | case WX_GL_LEVEL: |
| 321 | data[p++]=GLX_LEVEL; data[p++]=attribList[arg++]; break; |
| 322 | case WX_GL_DOUBLEBUFFER: data[p++] = GLX_DOUBLEBUFFER; break; |
| 323 | case WX_GL_STEREO: data[p++] = GLX_STEREO; break; |
| 324 | case WX_GL_AUX_BUFFERS: |
| 325 | data[p++]=GLX_AUX_BUFFERS; data[p++]=attribList[arg++]; break; |
| 326 | case WX_GL_MIN_RED: |
| 327 | data[p++]=GLX_RED_SIZE; data[p++]=attribList[arg++]; break; |
| 328 | case WX_GL_MIN_GREEN: |
| 329 | data[p++]=GLX_GREEN_SIZE; data[p++]=attribList[arg++]; break; |
| 330 | case WX_GL_MIN_BLUE: |
| 331 | data[p++]=GLX_BLUE_SIZE; data[p++]=attribList[arg++]; break; |
| 332 | case WX_GL_MIN_ALPHA: |
| 333 | data[p++]=GLX_ALPHA_SIZE; data[p++]=attribList[arg++]; break; |
| 334 | case WX_GL_DEPTH_SIZE: |
| 335 | data[p++]=GLX_DEPTH_SIZE; data[p++]=attribList[arg++]; break; |
| 336 | case WX_GL_STENCIL_SIZE: |
| 337 | data[p++]=GLX_STENCIL_SIZE; data[p++]=attribList[arg++]; break; |
| 338 | case WX_GL_MIN_ACCUM_RED: |
| 339 | data[p++]=GLX_ACCUM_RED_SIZE; data[p++]=attribList[arg++]; break; |
| 340 | case WX_GL_MIN_ACCUM_GREEN: |
| 341 | data[p++]=GLX_ACCUM_GREEN_SIZE; data[p++]=attribList[arg++]; break; |
| 342 | case WX_GL_MIN_ACCUM_BLUE: |
| 343 | data[p++]=GLX_ACCUM_BLUE_SIZE; data[p++]=attribList[arg++]; break; |
| 344 | case WX_GL_MIN_ACCUM_ALPHA: |
| 345 | data[p++]=GLX_ACCUM_ALPHA_SIZE; data[p++]=attribList[arg++]; break; |
| 346 | default: |
| 347 | break; |
| 348 | } |
| 349 | } |
| 350 | data[p] = 0; |
| 351 | |
| 352 | attribList = (int*) data; |
| 353 | } |
| 354 | |
| 355 | |
| 356 | Display *dpy = GDK_DISPLAY(); |
| 357 | |
| 358 | XVisualInfo *vi = glXChooseVisual( dpy, DefaultScreen(dpy), attribList ); |
| 359 | |
| 360 | m_vi = vi; // safe for later use |
| 361 | |
| 362 | wxCHECK_MSG( m_vi, FALSE, "required visual couldn't be found" ); |
| 363 | |
| 364 | GdkVisual *visual = gdkx_visual_get( vi->visualid ); |
| 365 | GdkColormap *colormap = gdk_colormap_new( gdkx_visual_get(vi->visualid), TRUE ); |
| 366 | |
| 367 | gtk_widget_push_colormap( colormap ); |
| 368 | gtk_widget_push_visual( visual ); |
| 369 | |
| 370 | wxScrolledWindow::Create( parent, id, pos, size, style, name ); |
| 371 | |
| 372 | m_glWidget = m_wxwindow; |
| 373 | |
| 374 | gtk_pizza_set_clear( GTK_PIZZA(m_wxwindow), FALSE ); |
| 375 | |
| 376 | gtk_signal_connect( GTK_OBJECT(m_wxwindow), "realize", |
| 377 | GTK_SIGNAL_FUNC(gtk_glwindow_realized_callback), (gpointer) this ); |
| 378 | |
| 379 | gtk_signal_connect( GTK_OBJECT(m_wxwindow), "map", |
| 380 | GTK_SIGNAL_FUNC(gtk_glwindow_map_callback), (gpointer) this ); |
| 381 | |
| 382 | gtk_signal_connect( GTK_OBJECT(m_wxwindow), "expose_event", |
| 383 | GTK_SIGNAL_FUNC(gtk_glwindow_expose_callback), (gpointer)this ); |
| 384 | |
| 385 | gtk_signal_connect( GTK_OBJECT(m_wxwindow), "draw", |
| 386 | GTK_SIGNAL_FUNC(gtk_glwindow_draw_callback), (gpointer)this ); |
| 387 | |
| 388 | gtk_signal_connect( GTK_OBJECT(m_widget), "size_allocate", |
| 389 | GTK_SIGNAL_FUNC(gtk_glcanvas_size_callback), (gpointer)this ); |
| 390 | |
| 391 | gtk_widget_pop_visual(); |
| 392 | gtk_widget_pop_colormap(); |
| 393 | |
| 394 | if (GTK_WIDGET_REALIZED(m_wxwindow)) |
| 395 | gtk_glwindow_realized_callback( m_wxwindow, this ); |
| 396 | |
| 397 | if (GTK_WIDGET_MAPPED(m_wxwindow)) |
| 398 | gtk_glwindow_map_callback( m_wxwindow, this ); |
| 399 | |
| 400 | return TRUE; |
| 401 | } |
| 402 | |
| 403 | wxGLCanvas::~wxGLCanvas() |
| 404 | { |
| 405 | XVisualInfo *vi = (XVisualInfo *) m_vi; |
| 406 | |
| 407 | if (vi) XFree( vi ); |
| 408 | if (m_glContext) delete m_glContext; |
| 409 | } |
| 410 | |
| 411 | void wxGLCanvas::SwapBuffers() |
| 412 | { |
| 413 | if (m_glContext) m_glContext->SwapBuffers(); |
| 414 | } |
| 415 | |
| 416 | void wxGLCanvas::OnSize(wxSizeEvent& WXUNUSED(event)) |
| 417 | { |
| 418 | int width, height; |
| 419 | GetClientSize( &width, &height ); |
| 420 | |
| 421 | if (m_glContext && GTK_WIDGET_REALIZED(m_glWidget) ) |
| 422 | { |
| 423 | SetCurrent(); |
| 424 | |
| 425 | glViewport(0, 0, (GLint)width, (GLint)height ); |
| 426 | glMatrixMode(GL_PROJECTION); |
| 427 | glLoadIdentity(); |
| 428 | glFrustum( -1.0, 1.0, -1.0, 1.0, 5.0, 15.0 ); |
| 429 | glMatrixMode(GL_MODELVIEW); |
| 430 | } |
| 431 | } |
| 432 | |
| 433 | void wxGLCanvas::SetCurrent() |
| 434 | { |
| 435 | if (m_glContext) m_glContext->SetCurrent(); |
| 436 | } |
| 437 | |
| 438 | void wxGLCanvas::SetColour( const char *colour ) |
| 439 | { |
| 440 | if (m_glContext) m_glContext->SetColour( colour ); |
| 441 | } |
| 442 | |
| 443 | void wxGLCanvas::OnInternalIdle() |
| 444 | { |
| 445 | if (m_glContext && m_exposed) |
| 446 | { |
| 447 | wxPaintEvent event( GetId() ); |
| 448 | event.SetEventObject( this ); |
| 449 | GetEventHandler()->ProcessEvent( event ); |
| 450 | |
| 451 | m_exposed = FALSE; |
| 452 | GetUpdateRegion().Clear(); |
| 453 | } |
| 454 | |
| 455 | wxWindow::OnInternalIdle(); |
| 456 | } |
| 457 | |
| 458 | #endif |
| 459 | // wxUSE_GLCANVAS |
| 460 | |