| 1 | ///////////////////////////////////////////////////////////////////////////// |
| 2 | // Name: 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 | #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA) |
| 13 | #pragma implementation "glcanvas.h" |
| 14 | #endif |
| 15 | |
| 16 | // For compilers that support precompilation, includes "wx.h". |
| 17 | #include "wx/wxprec.h" |
| 18 | |
| 19 | #include "wx/setup.h" |
| 20 | |
| 21 | #if wxUSE_GLCANVAS |
| 22 | |
| 23 | #include "wx/glcanvas.h" |
| 24 | |
| 25 | #include "wx/frame.h" |
| 26 | #include "wx/colour.h" |
| 27 | #include "wx/module.h" |
| 28 | #include "wx/app.h" |
| 29 | |
| 30 | extern "C" |
| 31 | { |
| 32 | #include "gtk/gtk.h" |
| 33 | #include "gdk/gdk.h" |
| 34 | #include "gdk/gdkx.h" |
| 35 | } |
| 36 | |
| 37 | #include "wx/gtk/win_gtk.h" |
| 38 | |
| 39 | // DLL options compatibility check: |
| 40 | #include "wx/build.h" |
| 41 | WX_CHECK_BUILD_OPTIONS("wxGL") |
| 42 | |
| 43 | //--------------------------------------------------------------------------- |
| 44 | // global data |
| 45 | //--------------------------------------------------------------------------- |
| 46 | |
| 47 | XVisualInfo *g_vi = (XVisualInfo*) NULL; |
| 48 | |
| 49 | //----------------------------------------------------------------------------- |
| 50 | // idle system |
| 51 | //----------------------------------------------------------------------------- |
| 52 | |
| 53 | extern void wxapp_install_idle_handler(); |
| 54 | extern bool g_isIdle; |
| 55 | |
| 56 | //--------------------------------------------------------------------------- |
| 57 | // wxGLContext |
| 58 | //--------------------------------------------------------------------------- |
| 59 | |
| 60 | IMPLEMENT_CLASS(wxGLContext,wxObject) |
| 61 | |
| 62 | wxGLContext::wxGLContext( bool WXUNUSED(isRGB), wxWindow *win, const wxPalette& WXUNUSED(palette) ) |
| 63 | { |
| 64 | m_window = win; |
| 65 | m_widget = win->m_wxwindow; |
| 66 | |
| 67 | wxGLCanvas *gc = (wxGLCanvas*) win; |
| 68 | XVisualInfo *vi = (XVisualInfo *) gc->m_vi; |
| 69 | |
| 70 | wxCHECK_RET( vi, _T("invalid visual for OpenGl") ); |
| 71 | |
| 72 | m_glContext = glXCreateContext( GDK_DISPLAY(), vi, None, GL_TRUE ); |
| 73 | |
| 74 | wxCHECK_RET( m_glContext, _T("Couldn't create OpenGl context") ); |
| 75 | } |
| 76 | |
| 77 | wxGLContext::wxGLContext( |
| 78 | bool WXUNUSED(isRGB), wxWindow *win, |
| 79 | const wxPalette& WXUNUSED(palette), |
| 80 | const wxGLContext *other /* for sharing display lists */ |
| 81 | ) |
| 82 | { |
| 83 | m_window = win; |
| 84 | m_widget = win->m_wxwindow; |
| 85 | |
| 86 | wxGLCanvas *gc = (wxGLCanvas*) win; |
| 87 | XVisualInfo *vi = (XVisualInfo *) gc->m_vi; |
| 88 | |
| 89 | wxCHECK_RET( vi, _T("invalid visual for OpenGl") ); |
| 90 | |
| 91 | m_glContext = glXCreateContext( GDK_DISPLAY(), vi, |
| 92 | other ? other->m_glContext : None, |
| 93 | GL_TRUE ); |
| 94 | |
| 95 | if ( !m_glContext ) |
| 96 | { |
| 97 | wxFAIL_MSG( _T("Couldn't create OpenGl context") ); |
| 98 | } |
| 99 | } |
| 100 | |
| 101 | wxGLContext::~wxGLContext() |
| 102 | { |
| 103 | if (!m_glContext) return; |
| 104 | |
| 105 | if (m_glContext == glXGetCurrentContext()) |
| 106 | { |
| 107 | glXMakeCurrent( GDK_DISPLAY(), None, NULL); |
| 108 | } |
| 109 | |
| 110 | glXDestroyContext( GDK_DISPLAY(), m_glContext ); |
| 111 | } |
| 112 | |
| 113 | void wxGLContext::SwapBuffers() |
| 114 | { |
| 115 | if (m_glContext) |
| 116 | { |
| 117 | GdkWindow *window = GTK_PIZZA(m_widget)->bin_window; |
| 118 | glXSwapBuffers( GDK_DISPLAY(), GDK_WINDOW_XWINDOW( window ) ); |
| 119 | } |
| 120 | } |
| 121 | |
| 122 | void wxGLContext::SetCurrent() |
| 123 | { |
| 124 | if (m_glContext) |
| 125 | { |
| 126 | GdkWindow *window = GTK_PIZZA(m_widget)->bin_window; |
| 127 | glXMakeCurrent( GDK_DISPLAY(), GDK_WINDOW_XWINDOW(window), m_glContext ); |
| 128 | } |
| 129 | } |
| 130 | |
| 131 | void wxGLContext::SetColour(const wxChar *colour) |
| 132 | { |
| 133 | wxColour col = wxTheColourDatabase->Find(colour); |
| 134 | if (col.Ok()) |
| 135 | { |
| 136 | float r = (float)(col.Red()/256.0); |
| 137 | float g = (float)(col.Green()/256.0); |
| 138 | float b = (float)(col.Blue()/256.0); |
| 139 | glColor3f( r, g, b); |
| 140 | } |
| 141 | } |
| 142 | |
| 143 | void wxGLContext::SetupPixelFormat() |
| 144 | { |
| 145 | } |
| 146 | |
| 147 | void wxGLContext::SetupPalette( const wxPalette& WXUNUSED(palette) ) |
| 148 | { |
| 149 | } |
| 150 | |
| 151 | wxPalette wxGLContext::CreateDefaultPalette() |
| 152 | { |
| 153 | return wxNullPalette; |
| 154 | } |
| 155 | |
| 156 | //----------------------------------------------------------------------------- |
| 157 | // "realize" from m_wxwindow |
| 158 | //----------------------------------------------------------------------------- |
| 159 | |
| 160 | static gint |
| 161 | gtk_glwindow_realized_callback( GtkWidget * WXUNUSED(widget), wxGLCanvas *win ) |
| 162 | { |
| 163 | // VZ: apparently in some cases we're called twice -- no idea why, |
| 164 | // but a check doesn't hurt |
| 165 | if ( !win->m_glContext ) |
| 166 | { |
| 167 | wxGLContext *share = win->m_sharedContext; |
| 168 | if ( !share && win->m_sharedContextOf ) |
| 169 | share = win->m_sharedContextOf->GetContext(); |
| 170 | |
| 171 | win->m_glContext = new wxGLContext( TRUE, win, wxNullPalette, share ); |
| 172 | } |
| 173 | |
| 174 | return FALSE; |
| 175 | } |
| 176 | |
| 177 | //----------------------------------------------------------------------------- |
| 178 | // "map" from m_wxwindow |
| 179 | //----------------------------------------------------------------------------- |
| 180 | |
| 181 | static gint |
| 182 | gtk_glwindow_map_callback( GtkWidget * WXUNUSED(widget), wxGLCanvas *win ) |
| 183 | { |
| 184 | if (win->m_glContext/* && win->m_exposed*/) |
| 185 | { |
| 186 | wxPaintEvent event( win->GetId() ); |
| 187 | event.SetEventObject( win ); |
| 188 | win->GetEventHandler()->ProcessEvent( event ); |
| 189 | |
| 190 | win->m_exposed = FALSE; |
| 191 | win->GetUpdateRegion().Clear(); |
| 192 | } |
| 193 | |
| 194 | return FALSE; |
| 195 | } |
| 196 | |
| 197 | //----------------------------------------------------------------------------- |
| 198 | // "expose_event" of m_wxwindow |
| 199 | //----------------------------------------------------------------------------- |
| 200 | |
| 201 | static void |
| 202 | gtk_glwindow_expose_callback( GtkWidget *WXUNUSED(widget), GdkEventExpose *gdk_event, wxGLCanvas *win ) |
| 203 | { |
| 204 | if (g_isIdle) |
| 205 | wxapp_install_idle_handler(); |
| 206 | |
| 207 | win->m_exposed = TRUE; |
| 208 | |
| 209 | win->GetUpdateRegion().Union( gdk_event->area.x, |
| 210 | gdk_event->area.y, |
| 211 | gdk_event->area.width, |
| 212 | gdk_event->area.height ); |
| 213 | } |
| 214 | |
| 215 | //----------------------------------------------------------------------------- |
| 216 | // "draw" of m_wxwindow |
| 217 | //----------------------------------------------------------------------------- |
| 218 | |
| 219 | #ifndef __WXGTK20__ |
| 220 | static void |
| 221 | gtk_glwindow_draw_callback( GtkWidget *WXUNUSED(widget), GdkRectangle *rect, wxGLCanvas *win ) |
| 222 | { |
| 223 | if (g_isIdle) |
| 224 | wxapp_install_idle_handler(); |
| 225 | |
| 226 | win->m_exposed = TRUE; |
| 227 | |
| 228 | win->GetUpdateRegion().Union( rect->x, rect->y, |
| 229 | rect->width, rect->height ); |
| 230 | } |
| 231 | #endif |
| 232 | |
| 233 | //----------------------------------------------------------------------------- |
| 234 | // "size_allocate" of m_wxwindow |
| 235 | //----------------------------------------------------------------------------- |
| 236 | |
| 237 | static void |
| 238 | gtk_glcanvas_size_callback( GtkWidget *WXUNUSED(widget), GtkAllocation* alloc, wxGLCanvas *win ) |
| 239 | { |
| 240 | if (g_isIdle) |
| 241 | wxapp_install_idle_handler(); |
| 242 | |
| 243 | if (!win->m_hasVMT) |
| 244 | return; |
| 245 | |
| 246 | wxSizeEvent event( wxSize(win->m_width,win->m_height), win->GetId() ); |
| 247 | event.SetEventObject( win ); |
| 248 | win->GetEventHandler()->ProcessEvent( event ); |
| 249 | } |
| 250 | |
| 251 | //--------------------------------------------------------------------------- |
| 252 | // wxGlCanvas |
| 253 | //--------------------------------------------------------------------------- |
| 254 | |
| 255 | IMPLEMENT_CLASS(wxGLCanvas, wxWindow) |
| 256 | |
| 257 | BEGIN_EVENT_TABLE(wxGLCanvas, wxWindow) |
| 258 | EVT_SIZE(wxGLCanvas::OnSize) |
| 259 | END_EVENT_TABLE() |
| 260 | |
| 261 | wxGLCanvas::wxGLCanvas( wxWindow *parent, wxWindowID id, |
| 262 | const wxPoint& pos, const wxSize& size, |
| 263 | long style, const wxString& name, |
| 264 | int *attribList, |
| 265 | const wxPalette& palette ) |
| 266 | { |
| 267 | Create( parent, NULL, NULL, id, pos, size, style, name, attribList, palette ); |
| 268 | } |
| 269 | |
| 270 | wxGLCanvas::wxGLCanvas( wxWindow *parent, |
| 271 | const wxGLContext *shared, |
| 272 | wxWindowID id, |
| 273 | const wxPoint& pos, const wxSize& size, |
| 274 | long style, const wxString& name, |
| 275 | int *attribList, |
| 276 | const wxPalette& palette ) |
| 277 | { |
| 278 | Create( parent, shared, NULL, id, pos, size, style, name, attribList, palette ); |
| 279 | } |
| 280 | |
| 281 | wxGLCanvas::wxGLCanvas( wxWindow *parent, |
| 282 | const wxGLCanvas *shared, |
| 283 | wxWindowID id, |
| 284 | const wxPoint& pos, const wxSize& size, |
| 285 | long style, const wxString& name, |
| 286 | int *attribList, |
| 287 | const wxPalette& palette ) |
| 288 | { |
| 289 | Create( parent, NULL, shared, id, pos, size, style, name, attribList, palette ); |
| 290 | } |
| 291 | |
| 292 | bool wxGLCanvas::Create( wxWindow *parent, |
| 293 | const wxGLContext *shared, |
| 294 | const wxGLCanvas *shared_context_of, |
| 295 | wxWindowID id, |
| 296 | const wxPoint& pos, const wxSize& size, |
| 297 | long style, const wxString& name, |
| 298 | int *attribList, |
| 299 | const wxPalette& palette) |
| 300 | { |
| 301 | m_sharedContext = (wxGLContext*)shared; // const_cast |
| 302 | m_sharedContextOf = (wxGLCanvas*)shared_context_of; // const_cast |
| 303 | m_glContext = (wxGLContext*) NULL; |
| 304 | |
| 305 | m_exposed = FALSE; |
| 306 | m_noExpose = TRUE; |
| 307 | m_nativeSizeEvent = TRUE; |
| 308 | |
| 309 | XVisualInfo *vi = NULL; |
| 310 | if (wxTheApp->m_glVisualInfo != NULL) |
| 311 | { |
| 312 | vi = (XVisualInfo *) wxTheApp->m_glVisualInfo; |
| 313 | m_canFreeVi = FALSE; // owned by wxTheApp - don't free upon destruction |
| 314 | } |
| 315 | else |
| 316 | { |
| 317 | vi = (XVisualInfo *) ChooseGLVisual(attribList); |
| 318 | m_canFreeVi = TRUE; |
| 319 | } |
| 320 | m_vi = vi; // save for later use |
| 321 | |
| 322 | wxCHECK_MSG( m_vi, FALSE, _T("required visual couldn't be found") ); |
| 323 | |
| 324 | GdkVisual *visual = gdkx_visual_get( vi->visualid ); |
| 325 | GdkColormap *colormap = gdk_colormap_new( gdkx_visual_get(vi->visualid), TRUE ); |
| 326 | |
| 327 | gtk_widget_push_colormap( colormap ); |
| 328 | gtk_widget_push_visual( visual ); |
| 329 | |
| 330 | wxWindow::Create( parent, id, pos, size, style, name ); |
| 331 | |
| 332 | m_glWidget = m_wxwindow; |
| 333 | |
| 334 | #ifdef __WXGTK20__ |
| 335 | gtk_widget_set_double_buffered( m_glWidget, FALSE ); |
| 336 | #endif |
| 337 | |
| 338 | gtk_pizza_set_clear( GTK_PIZZA(m_wxwindow), FALSE ); |
| 339 | |
| 340 | gtk_signal_connect( GTK_OBJECT(m_wxwindow), "realize", |
| 341 | GTK_SIGNAL_FUNC(gtk_glwindow_realized_callback), (gpointer) this ); |
| 342 | |
| 343 | gtk_signal_connect( GTK_OBJECT(m_wxwindow), "map", |
| 344 | GTK_SIGNAL_FUNC(gtk_glwindow_map_callback), (gpointer) this ); |
| 345 | |
| 346 | gtk_signal_connect( GTK_OBJECT(m_wxwindow), "expose_event", |
| 347 | GTK_SIGNAL_FUNC(gtk_glwindow_expose_callback), (gpointer)this ); |
| 348 | |
| 349 | #ifndef __WXGTK20__ |
| 350 | gtk_signal_connect( GTK_OBJECT(m_wxwindow), "draw", |
| 351 | GTK_SIGNAL_FUNC(gtk_glwindow_draw_callback), (gpointer)this ); |
| 352 | #endif |
| 353 | |
| 354 | gtk_signal_connect( GTK_OBJECT(m_widget), "size_allocate", |
| 355 | GTK_SIGNAL_FUNC(gtk_glcanvas_size_callback), (gpointer)this ); |
| 356 | |
| 357 | gtk_widget_pop_visual(); |
| 358 | gtk_widget_pop_colormap(); |
| 359 | |
| 360 | if (GTK_WIDGET_REALIZED(m_wxwindow)) |
| 361 | gtk_glwindow_realized_callback( m_wxwindow, this ); |
| 362 | |
| 363 | if (GTK_WIDGET_MAPPED(m_wxwindow)) |
| 364 | gtk_glwindow_map_callback( m_wxwindow, this ); |
| 365 | |
| 366 | return TRUE; |
| 367 | } |
| 368 | |
| 369 | wxGLCanvas::~wxGLCanvas() |
| 370 | { |
| 371 | XVisualInfo *vi = (XVisualInfo *) m_vi; |
| 372 | |
| 373 | if (vi && m_canFreeVi) XFree( vi ); |
| 374 | delete m_glContext; |
| 375 | } |
| 376 | |
| 377 | void* wxGLCanvas::ChooseGLVisual(int *attribList) |
| 378 | { |
| 379 | int data[512]; |
| 380 | if (!attribList) |
| 381 | { |
| 382 | // default settings if attriblist = 0 |
| 383 | data[0] = GLX_RGBA; |
| 384 | data[1] = GLX_DOUBLEBUFFER; |
| 385 | data[2] = GLX_DEPTH_SIZE; data[3] = 1; |
| 386 | data[4] = GLX_RED_SIZE; data[5] = 1; |
| 387 | data[6] = GLX_GREEN_SIZE; data[7] = 1; |
| 388 | data[8] = GLX_BLUE_SIZE; data[9] = 1; |
| 389 | data[10] = GLX_ALPHA_SIZE; data[11] = 0; |
| 390 | data[12] = None; |
| 391 | |
| 392 | attribList = (int*) data; |
| 393 | } |
| 394 | else |
| 395 | { |
| 396 | int arg=0, p=0; |
| 397 | |
| 398 | while( (attribList[arg]!=0) && (p<510) ) |
| 399 | { |
| 400 | switch( attribList[arg++] ) |
| 401 | { |
| 402 | case WX_GL_RGBA: data[p++] = GLX_RGBA; break; |
| 403 | case WX_GL_BUFFER_SIZE: |
| 404 | data[p++]=GLX_BUFFER_SIZE; data[p++]=attribList[arg++]; break; |
| 405 | case WX_GL_LEVEL: |
| 406 | data[p++]=GLX_LEVEL; data[p++]=attribList[arg++]; break; |
| 407 | case WX_GL_DOUBLEBUFFER: data[p++] = GLX_DOUBLEBUFFER; break; |
| 408 | case WX_GL_STEREO: data[p++] = GLX_STEREO; break; |
| 409 | case WX_GL_AUX_BUFFERS: |
| 410 | data[p++]=GLX_AUX_BUFFERS; data[p++]=attribList[arg++]; break; |
| 411 | case WX_GL_MIN_RED: |
| 412 | data[p++]=GLX_RED_SIZE; data[p++]=attribList[arg++]; break; |
| 413 | case WX_GL_MIN_GREEN: |
| 414 | data[p++]=GLX_GREEN_SIZE; data[p++]=attribList[arg++]; break; |
| 415 | case WX_GL_MIN_BLUE: |
| 416 | data[p++]=GLX_BLUE_SIZE; data[p++]=attribList[arg++]; break; |
| 417 | case WX_GL_MIN_ALPHA: |
| 418 | data[p++]=GLX_ALPHA_SIZE; data[p++]=attribList[arg++]; break; |
| 419 | case WX_GL_DEPTH_SIZE: |
| 420 | data[p++]=GLX_DEPTH_SIZE; data[p++]=attribList[arg++]; break; |
| 421 | case WX_GL_STENCIL_SIZE: |
| 422 | data[p++]=GLX_STENCIL_SIZE; data[p++]=attribList[arg++]; break; |
| 423 | case WX_GL_MIN_ACCUM_RED: |
| 424 | data[p++]=GLX_ACCUM_RED_SIZE; data[p++]=attribList[arg++]; break; |
| 425 | case WX_GL_MIN_ACCUM_GREEN: |
| 426 | data[p++]=GLX_ACCUM_GREEN_SIZE; data[p++]=attribList[arg++]; break; |
| 427 | case WX_GL_MIN_ACCUM_BLUE: |
| 428 | data[p++]=GLX_ACCUM_BLUE_SIZE; data[p++]=attribList[arg++]; break; |
| 429 | case WX_GL_MIN_ACCUM_ALPHA: |
| 430 | data[p++]=GLX_ACCUM_ALPHA_SIZE; data[p++]=attribList[arg++]; break; |
| 431 | default: |
| 432 | break; |
| 433 | } |
| 434 | } |
| 435 | data[p] = 0; |
| 436 | |
| 437 | attribList = (int*) data; |
| 438 | } |
| 439 | |
| 440 | |
| 441 | Display *dpy = GDK_DISPLAY(); |
| 442 | |
| 443 | return glXChooseVisual( dpy, DefaultScreen(dpy), attribList ); |
| 444 | } |
| 445 | |
| 446 | void wxGLCanvas::SwapBuffers() |
| 447 | { |
| 448 | if (m_glContext) |
| 449 | m_glContext->SwapBuffers(); |
| 450 | } |
| 451 | |
| 452 | void wxGLCanvas::OnSize(wxSizeEvent& WXUNUSED(event)) |
| 453 | { |
| 454 | } |
| 455 | |
| 456 | void wxGLCanvas::SetCurrent() |
| 457 | { |
| 458 | if (m_glContext) |
| 459 | m_glContext->SetCurrent(); |
| 460 | } |
| 461 | |
| 462 | void wxGLCanvas::SetColour( const wxChar *colour ) |
| 463 | { |
| 464 | if (m_glContext) |
| 465 | m_glContext->SetColour( colour ); |
| 466 | } |
| 467 | |
| 468 | void wxGLCanvas::OnInternalIdle() |
| 469 | { |
| 470 | if (m_glContext && m_exposed) |
| 471 | { |
| 472 | wxPaintEvent event( GetId() ); |
| 473 | event.SetEventObject( this ); |
| 474 | GetEventHandler()->ProcessEvent( event ); |
| 475 | |
| 476 | m_exposed = FALSE; |
| 477 | GetUpdateRegion().Clear(); |
| 478 | } |
| 479 | |
| 480 | wxWindow::OnInternalIdle(); |
| 481 | } |
| 482 | |
| 483 | |
| 484 | |
| 485 | //--------------------------------------------------------------------------- |
| 486 | // wxGLApp |
| 487 | //--------------------------------------------------------------------------- |
| 488 | |
| 489 | IMPLEMENT_CLASS(wxGLApp, wxApp) |
| 490 | |
| 491 | wxGLApp::~wxGLApp() |
| 492 | { |
| 493 | if (m_glVisualInfo) |
| 494 | XFree(m_glVisualInfo); |
| 495 | } |
| 496 | |
| 497 | bool wxGLApp::InitGLVisual(int *attribList) |
| 498 | { |
| 499 | if (m_glVisualInfo) |
| 500 | XFree(m_glVisualInfo); |
| 501 | |
| 502 | m_glVisualInfo = wxGLCanvas::ChooseGLVisual(attribList); |
| 503 | |
| 504 | return m_glVisualInfo != NULL; |
| 505 | } |
| 506 | |
| 507 | #endif |
| 508 | // wxUSE_GLCANVAS |
| 509 | |