src/msw/glcanvas.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        glcanvas.cpp
   3 // Purpose:     wxGLCanvas, for using OpenGL with wxWindows under MS Windows
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     04/01/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart
   9 // Licence:       wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifdef __GNUG__
  13 #pragma implementation "glcanvas.h"
  14 #endif
  15
  16 #include "wx/wxprec.h"
  17
  18 #if defined(__BORLANDC__)
  19 #pragma hdrstop
  20 #endif
  21
  22 #include <wx/setup.h>
  23
  24 #if wxUSE_GLCANVAS
  25
  26 #ifndef WX_PRECOMP
  27 #include <wx/frame.h>
  28 #endif
  29
  30 #include <wx/msw/private.h>
  31 #include <wx/settings.h>
  32 #include <wx/log.h>
  33
  34 #include <wx/glcanvas.h>
  35
  36 static const wxChar *wxGLCanvasClassName = wxT("wxGLCanvasClass");
  37 static const wxChar *wxGLCanvasClassNameNoRedraw = wxT("wxGLCanvasClassNR");
  38
  39 LRESULT WXDLLEXPORT APIENTRY _EXPORT wxWndProc(HWND hWnd, UINT message,
  40                                    WPARAM wParam, LPARAM lParam);
  41
  42 /*
  43  * GLContext implementation
  44  */
  45
  46 wxGLContext::wxGLContext(bool isRGB, wxGLCanvas *win, const wxPalette& palette)
  47 {
  48   m_window = win;
  49
  50   m_hDC = win->GetHDC();
  51
  52   m_glContext = wglCreateContext((HDC) m_hDC);
  53   wxCHECK_RET( m_glContext, wxT("Couldn't create OpenGl context") );
  54
  55   wglMakeCurrent((HDC) m_hDC, m_glContext);
  56 }
  57
  58 wxGLContext::wxGLContext(
  59                bool isRGB, wxGLCanvas *win,
  60                const wxPalette& palette,
  61                const wxGLContext *other  /* for sharing display lists */
  62              )
  63 {
  64   m_window = win;
  65
  66   m_hDC = win->GetHDC();
  67
  68   m_glContext = wglCreateContext((HDC) m_hDC);
  69   wxCHECK_RET( m_glContext, wxT("Couldn't create OpenGl context") );
  70
  71   if( other != 0 )
  72     wglShareLists( other->m_glContext, m_glContext );
  73
  74   wglMakeCurrent((HDC) m_hDC, m_glContext);
  75 }
  76
  77 wxGLContext::~wxGLContext()
  78 {
  79   if (m_glContext)
  80   {
  81     wglMakeCurrent(NULL, NULL);
  82     wglDeleteContext(m_glContext);
  83   }
  84 }
  85
  86 void wxGLContext::SwapBuffers()
  87 {
  88   if (m_glContext)
  89   {
  90     wglMakeCurrent((HDC) m_hDC, m_glContext);
  91     ::SwapBuffers((HDC) m_hDC);    //blits the backbuffer into DC
  92   }
  93 }
  94
  95 void wxGLContext::SetCurrent()
  96 {
  97   if (m_glContext)
  98   {
  99     wglMakeCurrent((HDC) m_hDC, m_glContext);
 100   }
 101
 102   /*
 103   setupPixelFormat(hDC);
 104   setupPalette(hDC);
 105   */
 106 }
 107
 108 void wxGLContext::SetColour(const char *colour)
 109 {
 110   float r = 0.0;
 111   float g = 0.0;
 112   float b = 0.0;
 113   wxColour *col = wxTheColourDatabase->FindColour(colour);
 114   if (col)
 115   {
 116     r = (float)(col->Red()/256.0);
 117     g = (float)(col->Green()/256.0);
 118     b = (float)(col->Blue()/256.0);
 119     glColor3f( r, g, b);
 120   }
 121 }
 122
 123
 124 /*
 125  * wxGLCanvas implementation
 126  */
 127
 128 IMPLEMENT_CLASS(wxGLCanvas, wxWindow)
 129
 130 BEGIN_EVENT_TABLE(wxGLCanvas, wxWindow)
 131     EVT_SIZE(wxGLCanvas::OnSize)
 132     EVT_PALETTE_CHANGED(wxGLCanvas::OnPaletteChanged)
 133     EVT_QUERY_NEW_PALETTE(wxGLCanvas::OnQueryNewPalette)
 134 END_EVENT_TABLE()
 135
 136 wxGLCanvas::wxGLCanvas(wxWindow *parent, wxWindowID id,
 137     const wxPoint& pos, const wxSize& size, long style, const wxString& name,
 138     int *attribList, const wxPalette& palette) : wxWindow()
 139 {
 140   m_glContext = (wxGLContext*) NULL;
 141
 142   bool ret = Create(parent, id, pos, size, style, name);
 143
 144   if ( ret )
 145   {
 146     SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE));
 147     SetFont(wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT));
 148   }
 149
 150   m_hDC = (WXHDC) ::GetDC((HWND) GetHWND());
 151
 152   SetupPixelFormat(attribList);
 153   SetupPalette(palette);
 154
 155   m_glContext = new wxGLContext(TRUE, this, palette);
 156 }
 157
 158 wxGLCanvas::wxGLCanvas( wxWindow *parent,
 159               const wxGLContext *shared, wxWindowID id,
 160               const wxPoint& pos, const wxSize& size, long style, const wxString& name,
 161               int *attribList, const wxPalette& palette )
 162   : wxWindow()
 163 {
 164   m_glContext = (wxGLContext*) NULL;
 165
 166   bool ret = Create(parent, id, pos, size, style, name);
 167
 168   if ( ret )
 169   {
 170     SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE));
 171     SetFont(wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT));
 172   }
 173
 174   m_hDC = (WXHDC) ::GetDC((HWND) GetHWND());
 175
 176   SetupPixelFormat(attribList);
 177   SetupPalette(palette);
 178
 179   m_glContext = new wxGLContext(TRUE, this, palette, shared );
 180 }
 181
 182 // Not very useful for wxMSW, but this is to be wxGTK compliant
 183
 184 wxGLCanvas::wxGLCanvas( wxWindow *parent, const wxGLCanvas *shared, wxWindowID id,
 185                         const wxPoint& pos, const wxSize& size, long style, const wxString& name,
 186                         int *attribList, const wxPalette& palette ):
 187   wxWindow()
 188 {
 189   m_glContext = (wxGLContext*) NULL;
 190
 191   bool ret = Create(parent, id, pos, size, style, name);
 192
 193   if ( ret )
 194   {
 195     SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE));
 196     SetFont(wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT));
 197   }
 198
 199   m_hDC = (WXHDC) ::GetDC((HWND) GetHWND());
 200
 201   SetupPixelFormat(attribList);
 202   SetupPalette(palette);
 203
 204   wxGLContext *sharedContext=0;
 205   if (shared) sharedContext=shared->GetContext();
 206   m_glContext = new wxGLContext(TRUE, this, palette, sharedContext );
 207 }
 208
 209 wxGLCanvas::~wxGLCanvas()
 210 {
 211   if (m_glContext)
 212     delete m_glContext;
 213
 214   ::ReleaseDC((HWND) GetHWND(), (HDC) m_hDC);
 215 }
 216
 217 // Replaces wxWindow::Create functionality, since we need to use a different
 218 // window class
 219 bool wxGLCanvas::Create(wxWindow *parent,
 220                         wxWindowID id,
 221                         const wxPoint& pos,
 222                         const wxSize& size,
 223                         long style,
 224                         const wxString& name)
 225 {
 226   static bool s_registeredGLCanvasClass = FALSE;
 227
 228   // We have to register a special window class because we need
 229   // the CS_OWNDC style for GLCanvas.
 230
 231   /*
 232   From Angel Popov <jumpo@bitex.com>
 233
 234   Here are two snips from a dicussion in the OpenGL Gamedev list that explains
 235   how this problem can be fixed:
 236
 237   "There are 5 common DCs available in Win95. These are aquired when you call
 238   GetDC or GetDCEx from a window that does _not_ have the OWNDC flag.
 239   OWNDC flagged windows do not get their DC from the common DC pool, the issue
 240   is they require 800 bytes each from the limited 64Kb local heap for GDI."
 241
 242   "The deal is, if you hold onto one of the 5 shared DC's too long (as GL apps
 243   do), Win95 will actually "steal" it from you.  MakeCurrent fails,
 244   apparently, because Windows re-assigns the HDC to a different window.  The
 245   only way to prevent this, the only reliable means, is to set CS_OWNDC."
 246   */
 247
 248   if (!s_registeredGLCanvasClass)
 249   {
 250     WNDCLASS wndclass;
 251
 252     // the fields which are common to all classes
 253     wndclass.lpfnWndProc   = (WNDPROC)wxWndProc;
 254     wndclass.cbClsExtra    = 0;
 255     wndclass.cbWndExtra    = sizeof( DWORD ); // VZ: what is this DWORD used for?
 256     wndclass.hInstance     = wxhInstance;
 257     wndclass.hIcon         = (HICON) NULL;
 258     wndclass.hCursor       = ::LoadCursor((HINSTANCE)NULL, IDC_ARROW);
 259     wndclass.lpszMenuName  = NULL;
 260
 261     // Register the GLCanvas class name
 262     wndclass.hbrBackground = (HBRUSH)NULL;
 263     wndclass.lpszClassName = wxGLCanvasClassName;
 264     wndclass.style         = CS_HREDRAW | CS_VREDRAW | CS_DBLCLKS | CS_OWNDC;
 265
 266     if ( !::RegisterClass(&wndclass) )
 267     {
 268       wxLogLastError(wxT("RegisterClass(wxGLCanvasClass)"));
 269       return FALSE;
 270     }
 271
 272     // Register the GLCanvas class name for windows which don't do full repaint
 273     // on resize
 274     wndclass.lpszClassName = wxGLCanvasClassNameNoRedraw;
 275     wndclass.style        &= ~(CS_HREDRAW | CS_VREDRAW);
 276
 277     if ( !::RegisterClass(&wndclass) )
 278     {
 279         wxLogLastError(wxT("RegisterClass(wxGLCanvasClassNameNoRedraw)"));
 280
 281         ::UnregisterClass(wxGLCanvasClassName, wxhInstance);
 282
 283         return FALSE;
 284     }
 285
 286     s_registeredGLCanvasClass = TRUE;
 287   }
 288
 289   wxCHECK_MSG( parent, FALSE, wxT("can't create wxWindow without parent") );
 290
 291   if ( !CreateBase(parent, id, pos, size, style, wxDefaultValidator, name) )
 292     return FALSE;
 293
 294   parent->AddChild(this);
 295
 296   DWORD msflags = 0;
 297   if ( style & wxBORDER )
 298     msflags |= WS_BORDER;
 299   if ( style & wxTHICK_FRAME )
 300     msflags |= WS_THICKFRAME;
 301
 302   /*
 303   A general rule with OpenGL and Win32 is that any window that will have a
 304   HGLRC built for it must have two flags:  WS_CLIPCHILDREN & WS_CLIPSIBLINGS.
 305   You can find references about this within the knowledge base and most OpenGL
 306   books that contain the wgl function descriptions.
 307   */
 308
 309   msflags |= WS_CHILD | WS_VISIBLE | WS_CLIPSIBLINGS | WS_CLIPCHILDREN;
 310
 311   bool want3D;
 312   WXDWORD exStyle = Determine3DEffects(WS_EX_CLIENTEDGE, &want3D);
 313
 314   // Even with extended styles, need to combine with WS_BORDER
 315   // for them to look right.
 316   if ( want3D || (m_windowStyle & wxSIMPLE_BORDER) || (m_windowStyle & wxRAISED_BORDER ) ||
 317        (m_windowStyle & wxSUNKEN_BORDER) || (m_windowStyle & wxDOUBLE_BORDER))
 318   {
 319     msflags |= WS_BORDER;
 320   }
 321
 322   // calculate the value to return from WM_GETDLGCODE handler
 323   if ( GetWindowStyleFlag() & wxWANTS_CHARS )
 324   {
 325     // want everything: i.e. all keys and WM_CHAR message
 326     m_lDlgCode = DLGC_WANTARROWS | DLGC_WANTCHARS |
 327                  DLGC_WANTTAB | DLGC_WANTMESSAGE;
 328   }
 329
 330   return MSWCreate(wxGLCanvasClassName, NULL, pos, size, msflags, exStyle);
 331 }
 332
 333 static void AdjustPFDForAttributes(PIXELFORMATDESCRIPTOR& pfd, int *attribList)
 334 {
 335   if (attribList) {
 336     pfd.dwFlags &= ~PFD_DOUBLEBUFFER;
 337     pfd.iPixelType = PFD_TYPE_COLORINDEX;
 338     pfd.cColorBits = 0;
 339     int arg=0;
 340
 341     while( (attribList[arg]!=0) )
 342     {
 343       switch( attribList[arg++] )
 344       {
 345         case WX_GL_RGBA:
 346           pfd.iPixelType = PFD_TYPE_RGBA;
 347           break;
 348         case WX_GL_BUFFER_SIZE:
 349           pfd.cColorBits = attribList[arg++];
 350           break;
 351         case WX_GL_LEVEL:
 352           // this member looks like it may be obsolete
 353           if (attribList[arg] > 0) {
 354             pfd.iLayerType = (BYTE)PFD_OVERLAY_PLANE;
 355           } else if (attribList[arg] < 0) {
 356             pfd.iLayerType = (BYTE)PFD_UNDERLAY_PLANE;
 357           } else {
 358             pfd.iLayerType = (BYTE)PFD_MAIN_PLANE;
 359           }
 360           arg++;
 361           break;
 362         case WX_GL_DOUBLEBUFFER:
 363           pfd.dwFlags |= PFD_DOUBLEBUFFER;
 364           break;
 365         case WX_GL_STEREO:
 366           pfd.dwFlags |= PFD_STEREO;
 367           break;
 368         case WX_GL_AUX_BUFFERS:
 369           pfd.cAuxBuffers = attribList[arg++];
 370           break;
 371         case WX_GL_MIN_RED:
 372           pfd.cColorBits += (pfd.cRedBits = attribList[arg++]);
 373           break;
 374         case WX_GL_MIN_GREEN:
 375           pfd.cColorBits += (pfd.cGreenBits = attribList[arg++]);
 376           break;
 377         case WX_GL_MIN_BLUE:
 378           pfd.cColorBits += (pfd.cBlueBits = attribList[arg++]);
 379           break;
 380         case WX_GL_MIN_ALPHA:
 381           // doesn't count in cColorBits
 382           pfd.cAlphaBits = attribList[arg++];
 383           break;
 384         case WX_GL_DEPTH_SIZE:
 385           pfd.cDepthBits = attribList[arg++];
 386           break;
 387         case WX_GL_STENCIL_SIZE:
 388           pfd.cStencilBits = attribList[arg++];
 389           break;
 390         case WX_GL_MIN_ACCUM_RED:
 391           pfd.cAccumBits += (pfd.cAccumRedBits = attribList[arg++]);
 392           break;
 393         case WX_GL_MIN_ACCUM_GREEN:
 394           pfd.cAccumBits += (pfd.cAccumGreenBits = attribList[arg++]);
 395           break;
 396         case WX_GL_MIN_ACCUM_BLUE:
 397           pfd.cAccumBits += (pfd.cAccumBlueBits = attribList[arg++]);
 398           break;
 399         case WX_GL_MIN_ACCUM_ALPHA:
 400           pfd.cAccumBits += (pfd.cAccumAlphaBits = attribList[arg++]);
 401           break;
 402         default:
 403           break;
 404       }
 405     }
 406   }
 407 }
 408
 409 void wxGLCanvas::SetupPixelFormat(int *attribList) // (HDC hDC)
 410 {
 411   int pixelFormat;
 412   PIXELFORMATDESCRIPTOR pfd = {
 413         sizeof(PIXELFORMATDESCRIPTOR),    /* size */
 414         1,                /* version */
 415         PFD_SUPPORT_OPENGL |
 416         PFD_DRAW_TO_WINDOW |
 417         PFD_DOUBLEBUFFER,        /* support double-buffering */
 418         PFD_TYPE_RGBA,            /* color type */
 419         16,                /* prefered color depth */
 420         0, 0, 0, 0, 0, 0,        /* color bits (ignored) */
 421         0,                /* no alpha buffer */
 422         0,                /* alpha bits (ignored) */
 423         0,                /* no accumulation buffer */
 424         0, 0, 0, 0,            /* accum bits (ignored) */
 425         16,                /* depth buffer */
 426         0,                /* no stencil buffer */
 427         0,                /* no auxiliary buffers */
 428         PFD_MAIN_PLANE,            /* main layer */
 429         0,                /* reserved */
 430         0, 0, 0,            /* no layer, visible, damage masks */
 431     };
 432
 433   AdjustPFDForAttributes(pfd, attribList);
 434
 435   pixelFormat = ChoosePixelFormat((HDC) m_hDC, &pfd);
 436   if (pixelFormat == 0) {
 437     wxLogWarning(_("ChoosePixelFormat failed."));
 438   }
 439   else {
 440     if (SetPixelFormat((HDC) m_hDC, pixelFormat, &pfd) != TRUE) {
 441       wxLogWarning(_("SetPixelFormat failed."));
 442     }
 443   }
 444 }
 445
 446 void wxGLCanvas::SetupPalette(const wxPalette& palette)
 447 {
 448     int pixelFormat = GetPixelFormat((HDC) m_hDC);
 449     PIXELFORMATDESCRIPTOR pfd;
 450
 451     DescribePixelFormat((HDC) m_hDC, pixelFormat, sizeof(PIXELFORMATDESCRIPTOR), &pfd);
 452
 453     if (pfd.dwFlags & PFD_NEED_PALETTE)
 454     {
 455     }
 456     else
 457     {
 458       return;
 459     }
 460
 461     m_palette = palette;
 462
 463     if ( !m_palette.Ok() )
 464     {
 465         m_palette = CreateDefaultPalette();
 466     }
 467
 468     if (m_palette.Ok())
 469     {
 470         SelectPalette((HDC) m_hDC, (HPALETTE) m_palette.GetHPALETTE(), FALSE);
 471         RealizePalette((HDC) m_hDC);
 472     }
 473 }
 474
 475 wxPalette wxGLCanvas::CreateDefaultPalette()
 476 {
 477     PIXELFORMATDESCRIPTOR pfd;
 478     int paletteSize;
 479     int pixelFormat = GetPixelFormat((HDC) m_hDC);
 480
 481     DescribePixelFormat((HDC) m_hDC, pixelFormat, sizeof(PIXELFORMATDESCRIPTOR), &pfd);
 482
 483     paletteSize = 1 << pfd.cColorBits;
 484
 485     LOGPALETTE* pPal =
 486      (LOGPALETTE*) malloc(sizeof(LOGPALETTE) + paletteSize * sizeof(PALETTEENTRY));
 487     pPal->palVersion = 0x300;
 488     pPal->palNumEntries = paletteSize;
 489
 490     /* build a simple RGB color palette */
 491     {
 492     int redMask = (1 << pfd.cRedBits) - 1;
 493     int greenMask = (1 << pfd.cGreenBits) - 1;
 494     int blueMask = (1 << pfd.cBlueBits) - 1;
 495     int i;
 496
 497     for (i=0; i<paletteSize; ++i) {
 498         pPal->palPalEntry[i].peRed =
 499             (((i >> pfd.cRedShift) & redMask) * 255) / redMask;
 500         pPal->palPalEntry[i].peGreen =
 501             (((i >> pfd.cGreenShift) & greenMask) * 255) / greenMask;
 502         pPal->palPalEntry[i].peBlue =
 503             (((i >> pfd.cBlueShift) & blueMask) * 255) / blueMask;
 504         pPal->palPalEntry[i].peFlags = 0;
 505     }
 506     }
 507
 508     HPALETTE hPalette = CreatePalette(pPal);
 509     free(pPal);
 510
 511     wxPalette palette;
 512     palette.SetHPALETTE((WXHPALETTE) hPalette);
 513
 514     return palette;
 515 }
 516
 517 void wxGLCanvas::SwapBuffers()
 518 {
 519   if (m_glContext)
 520     m_glContext->SwapBuffers();
 521 }
 522
 523 void wxGLCanvas::OnSize(wxSizeEvent& event)
 524 {
 525 }
 526
 527 void wxGLCanvas::SetCurrent()
 528 {
 529   if (m_glContext)
 530   {
 531     m_glContext->SetCurrent();
 532   }
 533 }
 534
 535 void wxGLCanvas::SetColour(const char *colour)
 536 {
 537   if (m_glContext)
 538     m_glContext->SetColour(colour);
 539 }
 540
 541 // TODO: Have to have this called by parent frame (?)
 542 // So we need wxFrame to call OnQueryNewPalette for all children...
 543 void wxGLCanvas::OnQueryNewPalette(wxQueryNewPaletteEvent& event)
 544 {
 545   /* realize palette if this is the current window */
 546   if ( GetPalette()->Ok() ) {
 547     ::UnrealizeObject((HPALETTE) GetPalette()->GetHPALETTE());
 548     ::SelectPalette((HDC) GetHDC(), (HPALETTE) GetPalette()->GetHPALETTE(), FALSE);
 549     ::RealizePalette((HDC) GetHDC());
 550     Refresh();
 551     event.SetPaletteRealized(TRUE);
 552   }
 553   else
 554     event.SetPaletteRealized(FALSE);
 555 }
 556
 557 // I think this doesn't have to be propagated to child windows.
 558 void wxGLCanvas::OnPaletteChanged(wxPaletteChangedEvent& event)
 559 {
 560   /* realize palette if this is *not* the current window */
 561   if ( GetPalette() &&
 562        GetPalette()->Ok() && (this != event.GetChangedWindow()) )
 563   {
 564     ::UnrealizeObject((HPALETTE) GetPalette()->GetHPALETTE());
 565     ::SelectPalette((HDC) GetHDC(), (HPALETTE) GetPalette()->GetHPALETTE(), FALSE);
 566     ::RealizePalette((HDC) GetHDC());
 567     Refresh();
 568   }
 569 }
 570
 571 /* Give extensions proper function names. */
 572
 573 /* EXT_vertex_array */
 574 void glArrayElementEXT(GLint i)
 575 {
 576 }
 577
 578 void glColorPointerEXT(GLint size, GLenum type, GLsizei stride, GLsizei count, const GLvoid *pointer)
 579 {
 580 }
 581
 582 void glDrawArraysEXT(GLenum mode, GLint first, GLsizei count)
 583 {
 584 #ifdef GL_EXT_vertex_array
 585     static PFNGLDRAWARRAYSEXTPROC proc = 0;
 586
 587     if ( !proc )
 588     {
 589         proc = (PFNGLDRAWARRAYSEXTPROC) wglGetProcAddress("glDrawArraysEXT");
 590     }
 591
 592     if ( proc )
 593         (* proc) (mode, first, count);
 594 #endif
 595 }
 596
 597 void glEdgeFlagPointerEXT(GLsizei stride, GLsizei count, const GLboolean *pointer)
 598 {
 599 }
 600
 601 void glGetPointervEXT(GLenum pname, GLvoid* *params)
 602 {
 603 }
 604
 605 void glIndexPointerEXT(GLenum type, GLsizei stride, GLsizei count, const GLvoid *pointer)
 606 {
 607 }
 608
 609 void glNormalPointerEXT(GLenum type, GLsizei stride, GLsizei count, const GLvoid *pointer)
 610 {
 611 #ifdef GL_EXT_vertex_array
 612   static PFNGLNORMALPOINTEREXTPROC proc = 0;
 613
 614   if ( !proc )
 615   {
 616     proc = (PFNGLNORMALPOINTEREXTPROC) wglGetProcAddress("glNormalPointerEXT");
 617   }
 618
 619   if ( proc )
 620     (* proc) (type, stride, count, pointer);
 621 #endif
 622 }
 623
 624 void glTexCoordPointerEXT(GLint size, GLenum type, GLsizei stride, GLsizei count, const GLvoid *pointer)
 625 {
 626 }
 627
 628 void glVertexPointerEXT(GLint size, GLenum type, GLsizei stride, GLsizei count, const GLvoid *pointer)
 629 {
 630 #ifdef GL_EXT_vertex_array
 631   static PFNGLVERTEXPOINTEREXTPROC proc = 0;
 632
 633   if ( !proc )
 634   {
 635     proc = (PFNGLVERTEXPOINTEREXTPROC) wglGetProcAddress("glVertexPointerEXT");
 636   }
 637   if ( proc )
 638     (* proc) (size, type, stride, count, pointer);
 639 #endif
 640 }
 641
 642 /* EXT_color_subtable */
 643 void glColorSubtableEXT(GLenum target, GLsizei start, GLsizei count, GLenum format, GLenum type, const GLvoid *table)
 644 {
 645 }
 646
 647 /* EXT_color_table */
 648 void glColorTableEXT(GLenum target, GLenum internalformat, GLsizei width, GLenum format, GLenum type, const GLvoid *table)
 649 {
 650 }
 651
 652 void glCopyColorTableEXT(GLenum target, GLenum internalformat, GLint x, GLint y, GLsizei width)
 653 {
 654 }
 655
 656 void glGetColorTableEXT(GLenum target, GLenum format, GLenum type, GLvoid *table)
 657 {
 658 }
 659
 660 void glGetColorTableParamaterfvEXT(GLenum target, GLenum pname, GLfloat *params)
 661 {
 662 }
 663
 664 void glGetColorTavleParameterivEXT(GLenum target, GLenum pname, GLint *params)
 665 {
 666 }
 667
 668 /* SGI_compiled_vertex_array */
 669 void glLockArraysSGI(GLint first, GLsizei count)
 670 {
 671 }
 672
 673 void glUnlockArraysSGI()
 674 {
 675 }
 676
 677
 678 /* SGI_cull_vertex */
 679 void glCullParameterdvSGI(GLenum pname, GLdouble* params)
 680 {
 681 }
 682
 683 void glCullParameterfvSGI(GLenum pname, GLfloat* params)
 684 {
 685 }
 686
 687 /* SGI_index_func */
 688 void glIndexFuncSGI(GLenum func, GLclampf ref)
 689 {
 690 }
 691
 692 /* SGI_index_material */
 693 void glIndexMaterialSGI(GLenum face, GLenum mode)
 694 {
 695 }
 696
 697 /* WIN_swap_hint */
 698 void glAddSwapHintRectWin(GLint x, GLint y, GLsizei width, GLsizei height)
 699 {
 700 }
 701
 702
 703 //---------------------------------------------------------------------------
 704 // wxGLApp
 705 //---------------------------------------------------------------------------
 706
 707 IMPLEMENT_CLASS(wxGLApp, wxApp)
 708
 709 bool wxGLApp::InitGLVisual(int *attribList)
 710 {
 711   int pixelFormat;
 712   PIXELFORMATDESCRIPTOR pfd = {
 713         sizeof(PIXELFORMATDESCRIPTOR),    /* size */
 714         1,                /* version */
 715         PFD_SUPPORT_OPENGL |
 716         PFD_DRAW_TO_WINDOW |
 717         PFD_DOUBLEBUFFER,        /* support double-buffering */
 718         PFD_TYPE_RGBA,            /* color type */
 719         16,                /* prefered color depth */
 720         0, 0, 0, 0, 0, 0,        /* color bits (ignored) */
 721         0,                /* no alpha buffer */
 722         0,                /* alpha bits (ignored) */
 723         0,                /* no accumulation buffer */
 724         0, 0, 0, 0,            /* accum bits (ignored) */
 725         16,                /* depth buffer */
 726         0,                /* no stencil buffer */
 727         0,                /* no auxiliary buffers */
 728         PFD_MAIN_PLANE,            /* main layer */
 729         0,                /* reserved */
 730         0, 0, 0,            /* no layer, visible, damage masks */
 731     };
 732
 733   AdjustPFDForAttributes(pfd, attribList);
 734
 735   // use DC for whole (root) screen, since no windows have yet been created
 736   pixelFormat = ChoosePixelFormat((HDC) ::GetDC(NULL), &pfd);
 737
 738   if (pixelFormat == 0) {
 739     wxLogError(_("Failed to initialize OpenGL"));
 740     return FALSE;
 741   }
 742
 743   return TRUE;
 744 }
 745
 746 wxGLApp::~wxGLApp()
 747 {
 748 }
 749
 750 #endif
 751     // wxUSE_GLCANVAS