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 wxChar wxGLCanvasClassName[]        = wxT("wxGLCanvasClass");
  37
  38 LRESULT WXDLLEXPORT APIENTRY _EXPORT wxWndProc(HWND hWnd, UINT message,
  39                                    WPARAM wParam, LPARAM lParam);
  40
  41 /*
  42  * GLContext implementation
  43  */
  44
  45 wxGLContext::wxGLContext(bool isRGB, wxGLCanvas *win, const wxPalette& palette)
  46 {
  47   m_window = win;
  48
  49   m_hDC = win->GetHDC();
  50
  51   m_glContext = wglCreateContext((HDC) m_hDC);
  52   wxCHECK_RET( m_glContext, wxT("Couldn't create OpenGl context") );
  53
  54   wglMakeCurrent((HDC) m_hDC, m_glContext);
  55 }
  56
  57 wxGLContext::wxGLContext(
  58                bool isRGB, wxGLCanvas *win,
  59                const wxPalette& palette,
  60                const wxGLContext *other  /* for sharing display lists */
  61              )
  62 {
  63   m_window = win;
  64
  65   m_hDC = win->GetHDC();
  66
  67   m_glContext = wglCreateContext((HDC) m_hDC);
  68   wxCHECK_RET( m_glContext, wxT("Couldn't create OpenGl context") );
  69
  70   if( other != 0 )
  71     wglShareLists( other->m_glContext, m_glContext );
  72
  73   wglMakeCurrent((HDC) m_hDC, m_glContext);
  74 }
  75
  76 wxGLContext::~wxGLContext()
  77 {
  78   if (m_glContext)
  79   {
  80     wglMakeCurrent(NULL, NULL);
  81     wglDeleteContext(m_glContext);
  82   }
  83 }
  84
  85 void wxGLContext::SwapBuffers()
  86 {
  87   if (m_glContext)
  88   {
  89     wglMakeCurrent((HDC) m_hDC, m_glContext);
  90     ::SwapBuffers((HDC) m_hDC);    //blits the backbuffer into DC
  91   }
  92 }
  93
  94 void wxGLContext::SetCurrent()
  95 {
  96   if (m_glContext)
  97   {
  98     wglMakeCurrent((HDC) m_hDC, m_glContext);
  99   }
 100
 101   /*
 102   setupPixelFormat(hDC);
 103   setupPalette(hDC);
 104   */
 105 }
 106
 107 void wxGLContext::SetColour(const char *colour)
 108 {
 109   float r = 0.0;
 110   float g = 0.0;
 111   float b = 0.0;
 112   wxColour *col = wxTheColourDatabase->FindColour(colour);
 113   if (col)
 114   {
 115     r = (float)(col->Red()/256.0);
 116     g = (float)(col->Green()/256.0);
 117     b = (float)(col->Blue()/256.0);
 118     glColor3f( r, g, b);
 119   }
 120 }
 121
 122
 123 /*
 124  * wxGLCanvas implementation
 125  */
 126
 127 IMPLEMENT_CLASS(wxGLCanvas, wxScrolledWindow)
 128
 129 BEGIN_EVENT_TABLE(wxGLCanvas, wxScrolledWindow)
 130     EVT_SIZE(wxGLCanvas::OnSize)
 131     EVT_PALETTE_CHANGED(wxGLCanvas::OnPaletteChanged)
 132     EVT_QUERY_NEW_PALETTE(wxGLCanvas::OnQueryNewPalette)
 133 END_EVENT_TABLE()
 134
 135 wxGLCanvas::wxGLCanvas(wxWindow *parent, wxWindowID id,
 136     const wxPoint& pos, const wxSize& size, long style, const wxString& name,
 137     int *attribList, const wxPalette& palette) : wxScrolledWindow()
 138 {
 139   m_glContext = (wxGLContext*) NULL;
 140
 141   bool ret = Create(parent, id, pos, size, style, name);
 142
 143   if ( ret )
 144   {
 145     SetBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DFACE));
 146     SetFont(wxSystemSettings::GetSystemFont(wxSYS_DEFAULT_GUI_FONT));
 147   }
 148
 149   m_hDC = (WXHDC) ::GetDC((HWND) GetHWND());
 150
 151   SetupPixelFormat(attribList);
 152   SetupPalette(palette);
 153
 154   m_glContext = new wxGLContext(TRUE, this, palette);
 155 }
 156
 157 wxGLCanvas::wxGLCanvas( wxWindow *parent,
 158               const wxGLContext *shared, wxWindowID id,
 159               const wxPoint& pos, const wxSize& size, long style, const wxString& name,
 160               int *attribList, const wxPalette& palette )
 161   : wxScrolledWindow()
 162 {
 163   m_glContext = (wxGLContext*) NULL;
 164
 165   bool ret = Create(parent, id, pos, size, style, name);
 166
 167   if ( ret )
 168   {
 169     SetBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DFACE));
 170     SetFont(wxSystemSettings::GetSystemFont(wxSYS_DEFAULT_GUI_FONT));
 171   }
 172
 173   m_hDC = (WXHDC) ::GetDC((HWND) GetHWND());
 174
 175   SetupPixelFormat(attribList);
 176   SetupPalette(palette);
 177
 178   m_glContext = new wxGLContext(TRUE, this, palette, shared );
 179 }
 180
 181 // Not very useful for wxMSW, but this is to be wxGTK compliant
 182
 183 wxGLCanvas::wxGLCanvas( wxWindow *parent, const wxGLCanvas *shared, wxWindowID id,
 184                         const wxPoint& pos, const wxSize& size, long style, const wxString& name,
 185                         int *attribList, const wxPalette& palette ):
 186   wxScrolledWindow()
 187 {
 188   m_glContext = (wxGLContext*) NULL;
 189
 190   bool ret = Create(parent, id, pos, size, style, name);
 191
 192   if ( ret )
 193   {
 194     SetBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DFACE));
 195     SetFont(wxSystemSettings::GetSystemFont(wxSYS_DEFAULT_GUI_FONT));
 196   }
 197
 198   m_hDC = (WXHDC) ::GetDC((HWND) GetHWND());
 199
 200   SetupPixelFormat(attribList);
 201   SetupPalette(palette);
 202
 203   wxGLContext *sharedContext=0;
 204   if (shared) sharedContext=shared->GetContext();
 205   m_glContext = new wxGLContext(TRUE, this, palette, sharedContext );
 206 }
 207
 208 wxGLCanvas::~wxGLCanvas()
 209 {
 210   if (m_glContext)
 211     delete m_glContext;
 212
 213   ::ReleaseDC((HWND) GetHWND(), (HDC) m_hDC);
 214 }
 215
 216 // Replaces wxWindow::Create functionality, since we need to use a different window class
 217 bool wxGLCanvas::Create(wxWindow *parent, wxWindowID id,
 218               const wxPoint& pos, const wxSize& size, long style, const wxString& name)
 219 {
 220   /*
 221   Suggestion from Kelly Brock <kbrock@8cs.com> (not yet implemented):
 222
 223   OpenGL corruption fix is simple assuming it doesn't screw anything else
 224   up.  Add the following line to the top of the create function:
 225
 226        wxSize parentSize = GetClientSize();
 227
 228   All locations within the function that use 'size' are changed to
 229   'parentSize'.
 230   The above corrects the initial display corruption with the GeForce and
 231   TNT2, not sure about other NVidia cards yet.
 232   */
 233
 234   static bool registeredGLCanvasClass = FALSE;
 235
 236   // We have to register a special window class because we need
 237   // the CS_OWNDC style for GLCanvas.
 238
 239   /*
 240   From Angel Popov <jumpo@bitex.com>
 241
 242   Here are two snips from a dicussion in the OpenGL Gamedev list that explains
 243   how this problem can be fixed:
 244
 245   "There are 5 common DCs available in Win95. These are aquired when you call
 246   GetDC or GetDCEx from a window that does _not_ have the OWNDC flag.
 247   OWNDC flagged windows do not get their DC from the common DC pool, the issue
 248   is they require 800 bytes each from the limited 64Kb local heap for GDI."
 249
 250   "The deal is, if you hold onto one of the 5 shared DC's too long (as GL apps
 251   do), Win95 will actually "steal" it from you.  MakeCurrent fails,
 252   apparently, because Windows re-assigns the HDC to a different window.  The
 253   only way to prevent this, the only reliable means, is to set CS_OWNDC."
 254   */
 255
 256   if (!registeredGLCanvasClass)
 257   {
 258     WNDCLASS wndclass;
 259
 260     static const long styleNormal = CS_HREDRAW | CS_VREDRAW | CS_DBLCLKS | CS_OWNDC;
 261
 262     // the fields which are common to all classes
 263     wndclass.lpfnWndProc   = (WNDPROC)wxWndProc;
 264     wndclass.cbClsExtra    = 0;
 265     wndclass.cbWndExtra    = sizeof( DWORD ); // VZ: what is this DWORD used for?
 266     wndclass.hInstance     = wxhInstance;
 267     wndclass.hIcon         = (HICON) NULL;
 268     wndclass.hCursor       = ::LoadCursor((HINSTANCE)NULL, IDC_ARROW);
 269     wndclass.lpszMenuName  = NULL;
 270
 271     // Register the GLCanvas class name
 272     wndclass.hbrBackground = (HBRUSH)NULL;
 273     wndclass.lpszClassName = wxGLCanvasClassName;
 274     wndclass.style         = styleNormal;
 275
 276     if ( !RegisterClass(&wndclass) )
 277     {
 278       wxLogLastError(wxT("RegisterClass(wxGLCanvasClass)"));
 279       return FALSE;
 280     }
 281
 282     registeredGLCanvasClass = TRUE;
 283   }
 284
 285   wxCHECK_MSG( parent, FALSE, wxT("can't create wxWindow without parent") );
 286
 287   if ( !CreateBase(parent, id, pos, size, style, wxDefaultValidator, name) )
 288     return FALSE;
 289
 290   parent->AddChild(this);
 291
 292   DWORD msflags = 0;
 293   if ( style & wxBORDER )
 294     msflags |= WS_BORDER;
 295   if ( style & wxTHICK_FRAME )
 296     msflags |= WS_THICKFRAME;
 297
 298   /*
 299   A general rule with OpenGL and Win32 is that any window that will have a
 300   HGLRC built for it must have two flags:  WS_CLIPCHILDREN & WS_CLIPSIBLINGS.
 301   You can find references about this within the knowledge base and most OpenGL
 302   books that contain the wgl function descriptions.
 303   */
 304
 305   msflags |= WS_CHILD | WS_VISIBLE | WS_CLIPSIBLINGS;
 306   //  if ( style & wxCLIP_CHILDREN )
 307   //    msflags |= WS_CLIPCHILDREN;
 308   msflags |= WS_CLIPCHILDREN;
 309
 310   bool want3D;
 311   WXDWORD exStyle = Determine3DEffects(WS_EX_CLIENTEDGE, &want3D);
 312
 313   // Even with extended styles, need to combine with WS_BORDER
 314   // for them to look right.
 315   if ( want3D || (m_windowStyle & wxSIMPLE_BORDER) || (m_windowStyle & wxRAISED_BORDER ) ||
 316        (m_windowStyle & wxSUNKEN_BORDER) || (m_windowStyle & wxDOUBLE_BORDER))
 317   {
 318     msflags |= WS_BORDER;
 319   }
 320
 321   // calculate the value to return from WM_GETDLGCODE handler
 322   if ( GetWindowStyleFlag() & wxWANTS_CHARS )
 323   {
 324     // want everything: i.e. all keys and WM_CHAR message
 325     m_lDlgCode = DLGC_WANTARROWS | DLGC_WANTCHARS |
 326                  DLGC_WANTTAB | DLGC_WANTMESSAGE;
 327   }
 328
 329   MSWCreate(m_windowId, parent, wxGLCanvasClassName, this, NULL,
 330             pos.x, pos.y,
 331             WidthDefault(size.x), HeightDefault(size.y),
 332             msflags, NULL, exStyle);
 333
 334   return TRUE;
 335 }
 336
 337 void wxGLCanvas::SetupPixelFormat(int *attribList) // (HDC hDC)
 338 {
 339   int pixelFormat;
 340   PIXELFORMATDESCRIPTOR pfd = {
 341                 sizeof(PIXELFORMATDESCRIPTOR),  /* size */
 342                 1,                              /* version */
 343                 PFD_SUPPORT_OPENGL |
 344                 PFD_DRAW_TO_WINDOW |
 345                 PFD_DOUBLEBUFFER,               /* support double-buffering */
 346                 PFD_TYPE_RGBA,                  /* color type */
 347                 16,                             /* prefered color depth */
 348                 0, 0, 0, 0, 0, 0,               /* color bits (ignored) */
 349                 0,                              /* no alpha buffer */
 350                 0,                              /* alpha bits (ignored) */
 351                 0,                              /* no accumulation buffer */
 352                 0, 0, 0, 0,                     /* accum bits (ignored) */
 353                 16,                             /* depth buffer */
 354                 0,                              /* no stencil buffer */
 355                 0,                              /* no auxiliary buffers */
 356                 PFD_MAIN_PLANE,                 /* main layer */
 357                 0,                              /* reserved */
 358                 0, 0, 0,                        /* no layer, visible, damage masks */
 359         };
 360
 361   if (attribList) {
 362     pfd.dwFlags &= ~PFD_DOUBLEBUFFER;
 363     pfd.iPixelType = PFD_TYPE_COLORINDEX;
 364     pfd.cColorBits = 0;
 365     int arg=0;
 366
 367     while( (attribList[arg]!=0) )
 368     {
 369       switch( attribList[arg++] )
 370       {
 371         case WX_GL_RGBA:
 372           pfd.iPixelType = PFD_TYPE_RGBA;
 373           break;
 374         case WX_GL_BUFFER_SIZE:
 375           pfd.cColorBits = attribList[arg++];
 376           break;
 377         case WX_GL_LEVEL:
 378           // this member looks like it may be obsolete
 379           if (attribList[arg] > 0) {
 380             pfd.iLayerType = PFD_OVERLAY_PLANE;
 381           } else if (attribList[arg] < 0) {
 382             pfd.iLayerType = PFD_UNDERLAY_PLANE;
 383           } else {
 384             pfd.iLayerType = PFD_MAIN_PLANE;
 385           }
 386           arg++;
 387           break;
 388         case WX_GL_DOUBLEBUFFER:
 389           pfd.dwFlags |= PFD_DOUBLEBUFFER;
 390           break;
 391         case WX_GL_STEREO:
 392           pfd.dwFlags |= PFD_STEREO;
 393           break;
 394         case WX_GL_AUX_BUFFERS:
 395           pfd.cAuxBuffers = attribList[arg++];
 396           break;
 397         case WX_GL_MIN_RED:
 398           pfd.cColorBits += (pfd.cRedBits = attribList[arg++]);
 399           break;
 400         case WX_GL_MIN_GREEN:
 401           pfd.cColorBits += (pfd.cGreenBits = attribList[arg++]);
 402           break;
 403         case WX_GL_MIN_BLUE:
 404           pfd.cColorBits += (pfd.cBlueBits = attribList[arg++]);
 405           break;
 406         case WX_GL_MIN_ALPHA:
 407           // doesn't count in cColorBits
 408           pfd.cAlphaBits = attribList[arg++];
 409           break;
 410         case WX_GL_DEPTH_SIZE:
 411           pfd.cDepthBits = attribList[arg++];
 412           break;
 413         case WX_GL_STENCIL_SIZE:
 414           pfd.cStencilBits = attribList[arg++];
 415           break;
 416         case WX_GL_MIN_ACCUM_RED:
 417           pfd.cAccumBits += (pfd.cAccumRedBits = attribList[arg++]);
 418           break;
 419         case WX_GL_MIN_ACCUM_GREEN:
 420           pfd.cAccumBits += (pfd.cAccumGreenBits = attribList[arg++]);
 421           break;
 422         case WX_GL_MIN_ACCUM_BLUE:
 423           pfd.cAccumBits += (pfd.cAccumBlueBits = attribList[arg++]);
 424           break;
 425         case WX_GL_MIN_ACCUM_ALPHA:
 426           pfd.cAccumBits += (pfd.cAccumAlphaBits = attribList[arg++]);
 427           break;
 428         default:
 429           break;
 430       }
 431     }
 432   }
 433   pixelFormat = ChoosePixelFormat((HDC) m_hDC, &pfd);
 434   if (pixelFormat == 0) {
 435     MessageBox(WindowFromDC((HDC) m_hDC), wxT("ChoosePixelFormat failed."), wxT("Error"),
 436                MB_ICONERROR | MB_OK);
 437     exit(1);
 438   }
 439
 440   if (SetPixelFormat((HDC) m_hDC, pixelFormat, &pfd) != TRUE) {
 441     MessageBox(WindowFromDC((HDC) m_hDC), wxT("SetPixelFormat failed."), wxT("Error"),
 442                MB_ICONERROR | MB_OK);
 443     exit(1);
 444   }
 445 }
 446
 447 void wxGLCanvas::SetupPalette(const wxPalette& palette)
 448 {
 449     int pixelFormat = GetPixelFormat((HDC) m_hDC);
 450     PIXELFORMATDESCRIPTOR pfd;
 451
 452     DescribePixelFormat((HDC) m_hDC, pixelFormat, sizeof(PIXELFORMATDESCRIPTOR), &pfd);
 453
 454     if (pfd.dwFlags & PFD_NEED_PALETTE)
 455     {
 456     }
 457     else
 458     {
 459           return;
 460     }
 461
 462     m_palette = palette;
 463
 464     if ( !m_palette.Ok() )
 465     {
 466         m_palette = CreateDefaultPalette();
 467     }
 468
 469     if (m_palette.Ok())
 470     {
 471         SelectPalette((HDC) m_hDC, (HPALETTE) m_palette.GetHPALETTE(), FALSE);
 472         RealizePalette((HDC) m_hDC);
 473     }
 474 }
 475
 476 wxPalette wxGLCanvas::CreateDefaultPalette()
 477 {
 478     PIXELFORMATDESCRIPTOR pfd;
 479     int paletteSize;
 480     int pixelFormat = GetPixelFormat((HDC) m_hDC);
 481
 482     DescribePixelFormat((HDC) m_hDC, pixelFormat, sizeof(PIXELFORMATDESCRIPTOR), &pfd);
 483
 484     paletteSize = 1 << pfd.cColorBits;
 485
 486     LOGPALETTE* pPal =
 487      (LOGPALETTE*) malloc(sizeof(LOGPALETTE) + paletteSize * sizeof(PALETTEENTRY));
 488     pPal->palVersion = 0x300;
 489     pPal->palNumEntries = paletteSize;
 490
 491     /* build a simple RGB color palette */
 492     {
 493         int redMask = (1 << pfd.cRedBits) - 1;
 494         int greenMask = (1 << pfd.cGreenBits) - 1;
 495         int blueMask = (1 << pfd.cBlueBits) - 1;
 496         int i;
 497
 498         for (i=0; i<paletteSize; ++i) {
 499             pPal->palPalEntry[i].peRed =
 500                     (((i >> pfd.cRedShift) & redMask) * 255) / redMask;
 501             pPal->palPalEntry[i].peGreen =
 502                     (((i >> pfd.cGreenShift) & greenMask) * 255) / greenMask;
 503             pPal->palPalEntry[i].peBlue =
 504                     (((i >> pfd.cBlueShift) & blueMask) * 255) / blueMask;
 505             pPal->palPalEntry[i].peFlags = 0;
 506         }
 507     }
 508
 509     HPALETTE hPalette = CreatePalette(pPal);
 510     free(pPal);
 511
 512     wxPalette palette;
 513     palette.SetHPALETTE((WXHPALETTE) hPalette);
 514
 515     return palette;
 516 }
 517
 518 void wxGLCanvas::SwapBuffers()
 519 {
 520   if (m_glContext)
 521     m_glContext->SwapBuffers();
 522 }
 523
 524 void wxGLCanvas::OnSize(wxSizeEvent& event)
 525 {
 526   int width, height;
 527   GetClientSize(& width, & height);
 528
 529   if (m_glContext)
 530   {
 531     m_glContext->SetCurrent();
 532
 533     glViewport(0, 0, (GLint)width, (GLint)height);
 534     glMatrixMode(GL_PROJECTION);
 535     glLoadIdentity();
 536     glFrustum( -1.0, 1.0, -1.0, 1.0, 5.0, 15.0 );
 537     glMatrixMode(GL_MODELVIEW);
 538   }
 539 }
 540
 541 void wxGLCanvas::SetCurrent()
 542 {
 543   if (m_glContext)
 544   {
 545     m_glContext->SetCurrent();
 546   }
 547 }
 548
 549 void wxGLCanvas::SetColour(const char *colour)
 550 {
 551   if (m_glContext)
 552     m_glContext->SetColour(colour);
 553 }
 554
 555 // TODO: Have to have this called by parent frame (?)
 556 // So we need wxFrame to call OnQueryNewPalette for all children...
 557 void wxGLCanvas::OnQueryNewPalette(wxQueryNewPaletteEvent& event)
 558 {
 559   /* realize palette if this is the current window */
 560   if ( GetPalette()->Ok() ) {
 561     ::UnrealizeObject((HPALETTE) GetPalette()->GetHPALETTE());
 562     ::SelectPalette((HDC) GetHDC(), (HPALETTE) GetPalette()->GetHPALETTE(), FALSE);
 563     ::RealizePalette((HDC) GetHDC());
 564     Refresh();
 565     event.SetPaletteRealized(TRUE);
 566   }
 567   else
 568     event.SetPaletteRealized(FALSE);
 569 }
 570
 571 // I think this doesn't have to be propagated to child windows.
 572 void wxGLCanvas::OnPaletteChanged(wxPaletteChangedEvent& event)
 573 {
 574   /* realize palette if this is *not* the current window */
 575   if ( GetPalette() &&
 576        GetPalette()->Ok() && (this != event.GetChangedWindow()) )
 577   {
 578     ::UnrealizeObject((HPALETTE) GetPalette()->GetHPALETTE());
 579     ::SelectPalette((HDC) GetHDC(), (HPALETTE) GetPalette()->GetHPALETTE(), FALSE);
 580     ::RealizePalette((HDC) GetHDC());
 581     Refresh();
 582   }
 583 }
 584
 585 /* Give extensions proper function names. */
 586
 587 /* EXT_vertex_array */
 588 void glArrayElementEXT(GLint i)
 589 {
 590 }
 591
 592 void glColorPointerEXT(GLint size, GLenum type, GLsizei stride, GLsizei count, const GLvoid *pointer)
 593 {
 594 }
 595
 596 void glDrawArraysEXT(GLenum mode, GLint first, GLsizei count)
 597 {
 598 #ifdef GL_EXT_vertex_array
 599     static PFNGLDRAWARRAYSEXTPROC proc = 0;
 600
 601     if ( !proc )
 602     {
 603         proc = (PFNGLDRAWARRAYSEXTPROC) wglGetProcAddress("glDrawArraysEXT");
 604     }
 605
 606     if ( proc )
 607         (* proc) (mode, first, count);
 608 #endif
 609 }
 610
 611 void glEdgeFlagPointerEXT(GLsizei stride, GLsizei count, const GLboolean *pointer)
 612 {
 613 }
 614
 615 void glGetPointervEXT(GLenum pname, GLvoid* *params)
 616 {
 617 }
 618
 619 void glIndexPointerEXT(GLenum type, GLsizei stride, GLsizei count, const GLvoid *pointer)
 620 {
 621 }
 622
 623 void glNormalPointerEXT(GLenum type, GLsizei stride, GLsizei count, const GLvoid *pointer)
 624 {
 625 #ifdef GL_EXT_vertex_array
 626   static PFNGLNORMALPOINTEREXTPROC proc = 0;
 627
 628   if ( !proc )
 629   {
 630     proc = (PFNGLNORMALPOINTEREXTPROC) wglGetProcAddress("glNormalPointerEXT");
 631   }
 632
 633   if ( proc )
 634     (* proc) (type, stride, count, pointer);
 635 #endif
 636 }
 637
 638 void glTexCoordPointerEXT(GLint size, GLenum type, GLsizei stride, GLsizei count, const GLvoid *pointer)
 639 {
 640 }
 641
 642 void glVertexPointerEXT(GLint size, GLenum type, GLsizei stride, GLsizei count, const GLvoid *pointer)
 643 {
 644 #ifdef GL_EXT_vertex_array
 645   static PFNGLVERTEXPOINTEREXTPROC proc = 0;
 646
 647   if ( !proc )
 648   {
 649     proc = (PFNGLVERTEXPOINTEREXTPROC) wglGetProcAddress("glVertexPointerEXT");
 650   }
 651   if ( proc )
 652     (* proc) (size, type, stride, count, pointer);
 653 #endif
 654 }
 655
 656 /* EXT_color_subtable */
 657 void glColorSubtableEXT(GLenum target, GLsizei start, GLsizei count, GLenum format, GLenum type, const GLvoid *table)
 658 {
 659 }
 660
 661 /* EXT_color_table */
 662 void glColorTableEXT(GLenum target, GLenum internalformat, GLsizei width, GLenum format, GLenum type, const GLvoid *table)
 663 {
 664 }
 665
 666 void glCopyColorTableEXT(GLenum target, GLenum internalformat, GLint x, GLint y, GLsizei width)
 667 {
 668 }
 669
 670 void glGetColorTableEXT(GLenum target, GLenum format, GLenum type, GLvoid *table)
 671 {
 672 }
 673
 674 void glGetColorTableParamaterfvEXT(GLenum target, GLenum pname, GLfloat *params)
 675 {
 676 }
 677
 678 void glGetColorTavleParameterivEXT(GLenum target, GLenum pname, GLint *params)
 679 {
 680 }
 681
 682 /* SGI_compiled_vertex_array */
 683 void glLockArraysSGI(GLint first, GLsizei count)
 684 {
 685 }
 686
 687 void glUnlockArraysSGI()
 688 {
 689 }
 690
 691
 692 /* SGI_cull_vertex */
 693 void glCullParameterdvSGI(GLenum pname, GLdouble* params)
 694 {
 695 }
 696
 697 void glCullParameterfvSGI(GLenum pname, GLfloat* params)
 698 {
 699 }
 700
 701 /* SGI_index_func */
 702 void glIndexFuncSGI(GLenum func, GLclampf ref)
 703 {
 704 }
 705
 706 /* SGI_index_material */
 707 void glIndexMaterialSGI(GLenum face, GLenum mode)
 708 {
 709 }
 710
 711 /* WIN_swap_hint */
 712 void glAddSwapHintRectWin(GLint x, GLint y, GLsizei width, GLsizei height)
 713 {
 714 }
 715
 716 #endif
 717     // wxUSE_GLCANVAS