src/msw/glcanvas.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/msw/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 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  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 #if wxUSE_GLCANVAS
  23
  24 #ifndef WX_PRECOMP
  25     #include "wx/frame.h"
  26     #include "wx/settings.h"
  27     #include "wx/intl.h"
  28     #include "wx/log.h"
  29     #include "wx/app.h"
  30 #endif
  31
  32 #include "wx/msw/private.h"
  33
  34 // DLL options compatibility check:
  35 #include "wx/build.h"
  36 WX_CHECK_BUILD_OPTIONS("wxGL")
  37
  38 #include "wx/glcanvas.h"
  39
  40 /*
  41   The following two compiler directives are specific to the Microsoft Visual
  42   C++ family of compilers
  43
  44   Fundementally what they do is instruct the linker to use these two libraries
  45   for the resolution of symbols. In essence, this is the equivalent of adding
  46   these two libraries to either the Makefile or project file.
  47
  48   This is NOT a recommended technique, and certainly is unlikely to be used
  49   anywhere else in wxWindows given it is so specific to not only wxMSW, but
  50   also the VC compiler. However, in the case of opengl support, it's an
  51   applicable technique as opengl is optional in setup.h This code (wrapped by
  52   wxUSE_GLCANVAS), now allows opengl support to be added purely by modifying
  53   setup.h rather than by having to modify either the project or DSP fle.
  54
  55   See MSDN for further information on the exact usage of these commands.
  56 */
  57 #ifdef _MSC_VER
  58 #  pragma comment( lib, "opengl32" )
  59 #  pragma comment( lib, "glu32" )
  60 #endif
  61
  62
  63 static const wxChar *wxGLCanvasClassName = wxT("wxGLCanvasClass");
  64 static const wxChar *wxGLCanvasClassNameNoRedraw = wxT("wxGLCanvasClassNR");
  65
  66 LRESULT WXDLLEXPORT APIENTRY _EXPORT wxWndProc(HWND hWnd, UINT message,
  67                                    WPARAM wParam, LPARAM lParam);
  68
  69 /*
  70  * GLContext implementation
  71  */
  72
  73 wxGLContext::wxGLContext(bool WXUNUSED(isRGB), wxGLCanvas *win, const wxPalette& WXUNUSED(palette))
  74 {
  75   m_window = win;
  76
  77   m_hDC = win->GetHDC();
  78
  79   m_glContext = wglCreateContext((HDC) m_hDC);
  80   wxCHECK_RET( m_glContext, wxT("Couldn't create OpenGl context") );
  81
  82   wglMakeCurrent((HDC) m_hDC, m_glContext);
  83 }
  84
  85 wxGLContext::wxGLContext(
  86                bool WXUNUSED(isRGB), wxGLCanvas *win,
  87                const wxPalette& WXUNUSED(palette),
  88                const wxGLContext *other  /* for sharing display lists */
  89              )
  90 {
  91   m_window = win;
  92
  93   m_hDC = win->GetHDC();
  94
  95   m_glContext = wglCreateContext((HDC) m_hDC);
  96   wxCHECK_RET( m_glContext, wxT("Couldn't create OpenGl context") );
  97
  98   if( other != 0 )
  99     wglShareLists( other->m_glContext, m_glContext );
 100
 101   wglMakeCurrent((HDC) m_hDC, m_glContext);
 102 }
 103
 104 wxGLContext::~wxGLContext()
 105 {
 106   if (m_glContext)
 107   {
 108     wglMakeCurrent(NULL, NULL);
 109     wglDeleteContext(m_glContext);
 110   }
 111 }
 112
 113 void wxGLContext::SwapBuffers()
 114 {
 115   if (m_glContext)
 116   {
 117     wglMakeCurrent((HDC) m_hDC, m_glContext);
 118     ::SwapBuffers((HDC) m_hDC);    //blits the backbuffer into DC
 119   }
 120 }
 121
 122 void wxGLContext::SetCurrent()
 123 {
 124   if (m_glContext)
 125   {
 126     wglMakeCurrent((HDC) m_hDC, m_glContext);
 127   }
 128
 129   /*
 130   setupPixelFormat(hDC);
 131   setupPalette(hDC);
 132   */
 133 }
 134
 135 void wxGLContext::SetColour(const wxChar *colour)
 136 {
 137   float r = 0.0;
 138   float g = 0.0;
 139   float b = 0.0;
 140   wxColour *col = wxTheColourDatabase->FindColour(colour);
 141   if (col)
 142   {
 143     r = (float)(col->Red()/256.0);
 144     g = (float)(col->Green()/256.0);
 145     b = (float)(col->Blue()/256.0);
 146     glColor3f( r, g, b);
 147   }
 148 }
 149
 150
 151 /*
 152  * wxGLCanvas implementation
 153  */
 154
 155 IMPLEMENT_CLASS(wxGLCanvas, wxWindow)
 156
 157 BEGIN_EVENT_TABLE(wxGLCanvas, wxWindow)
 158     EVT_SIZE(wxGLCanvas::OnSize)
 159     EVT_PALETTE_CHANGED(wxGLCanvas::OnPaletteChanged)
 160     EVT_QUERY_NEW_PALETTE(wxGLCanvas::OnQueryNewPalette)
 161 END_EVENT_TABLE()
 162
 163 wxGLCanvas::wxGLCanvas(wxWindow *parent, wxWindowID id,
 164     const wxPoint& pos, const wxSize& size, long style, const wxString& name,
 165     int *attribList, const wxPalette& palette) : wxWindow()
 166 {
 167   m_glContext = (wxGLContext*) NULL;
 168
 169   bool ret = Create(parent, id, pos, size, style, name);
 170
 171   if ( ret )
 172   {
 173     SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE));
 174     SetFont(wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT));
 175   }
 176
 177   m_hDC = (WXHDC) ::GetDC((HWND) GetHWND());
 178
 179   SetupPixelFormat(attribList);
 180   SetupPalette(palette);
 181
 182   m_glContext = new wxGLContext(TRUE, this, palette);
 183 }
 184
 185 wxGLCanvas::wxGLCanvas( wxWindow *parent,
 186               const wxGLContext *shared, wxWindowID id,
 187               const wxPoint& pos, const wxSize& size, long style, const wxString& name,
 188               int *attribList, const wxPalette& palette )
 189   : wxWindow()
 190 {
 191   m_glContext = (wxGLContext*) NULL;
 192
 193   bool ret = Create(parent, id, pos, size, style, name);
 194
 195   if ( ret )
 196   {
 197     SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE));
 198     SetFont(wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT));
 199   }
 200
 201   m_hDC = (WXHDC) ::GetDC((HWND) GetHWND());
 202
 203   SetupPixelFormat(attribList);
 204   SetupPalette(palette);
 205
 206   m_glContext = new wxGLContext(TRUE, this, palette, shared );
 207 }
 208
 209 // Not very useful for wxMSW, but this is to be wxGTK compliant
 210
 211 wxGLCanvas::wxGLCanvas( wxWindow *parent, const wxGLCanvas *shared, wxWindowID id,
 212                         const wxPoint& pos, const wxSize& size, long style, const wxString& name,
 213                         int *attribList, const wxPalette& palette ):
 214   wxWindow()
 215 {
 216   m_glContext = (wxGLContext*) NULL;
 217
 218   bool ret = Create(parent, id, pos, size, style, name);
 219
 220   if ( ret )
 221   {
 222     SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE));
 223     SetFont(wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT));
 224   }
 225
 226   m_hDC = (WXHDC) ::GetDC((HWND) GetHWND());
 227
 228   SetupPixelFormat(attribList);
 229   SetupPalette(palette);
 230
 231   wxGLContext *sharedContext=0;
 232   if (shared) sharedContext=shared->GetContext();
 233   m_glContext = new wxGLContext(TRUE, this, palette, sharedContext );
 234 }
 235
 236 wxGLCanvas::~wxGLCanvas()
 237 {
 238   if (m_glContext)
 239     delete m_glContext;
 240
 241   ::ReleaseDC((HWND) GetHWND(), (HDC) m_hDC);
 242 }
 243
 244 // Replaces wxWindow::Create functionality, since we need to use a different
 245 // window class
 246 bool wxGLCanvas::Create(wxWindow *parent,
 247                         wxWindowID id,
 248                         const wxPoint& pos,
 249                         const wxSize& size,
 250                         long style,
 251                         const wxString& name)
 252 {
 253   static bool s_registeredGLCanvasClass = FALSE;
 254
 255   // We have to register a special window class because we need
 256   // the CS_OWNDC style for GLCanvas.
 257
 258   /*
 259   From Angel Popov <jumpo@bitex.com>
 260
 261   Here are two snips from a dicussion in the OpenGL Gamedev list that explains
 262   how this problem can be fixed:
 263
 264   "There are 5 common DCs available in Win95. These are aquired when you call
 265   GetDC or GetDCEx from a window that does _not_ have the OWNDC flag.
 266   OWNDC flagged windows do not get their DC from the common DC pool, the issue
 267   is they require 800 bytes each from the limited 64Kb local heap for GDI."
 268
 269   "The deal is, if you hold onto one of the 5 shared DC's too long (as GL apps
 270   do), Win95 will actually "steal" it from you.  MakeCurrent fails,
 271   apparently, because Windows re-assigns the HDC to a different window.  The
 272   only way to prevent this, the only reliable means, is to set CS_OWNDC."
 273   */
 274
 275   if (!s_registeredGLCanvasClass)
 276   {
 277     WNDCLASS wndclass;
 278
 279     // the fields which are common to all classes
 280     wndclass.lpfnWndProc   = (WNDPROC)wxWndProc;
 281     wndclass.cbClsExtra    = 0;
 282     wndclass.cbWndExtra    = sizeof( DWORD ); // VZ: what is this DWORD used for?
 283     wndclass.hInstance     = wxhInstance;
 284     wndclass.hIcon         = (HICON) NULL;
 285     wndclass.hCursor       = ::LoadCursor((HINSTANCE)NULL, IDC_ARROW);
 286     wndclass.lpszMenuName  = NULL;
 287
 288     // Register the GLCanvas class name
 289     wndclass.hbrBackground = (HBRUSH)NULL;
 290     wndclass.lpszClassName = wxGLCanvasClassName;
 291     wndclass.style         = CS_HREDRAW | CS_VREDRAW | CS_DBLCLKS | CS_OWNDC;
 292
 293     if ( !::RegisterClass(&wndclass) )
 294     {
 295       wxLogLastError(wxT("RegisterClass(wxGLCanvasClass)"));
 296       return FALSE;
 297     }
 298
 299     // Register the GLCanvas class name for windows which don't do full repaint
 300     // on resize
 301     wndclass.lpszClassName = wxGLCanvasClassNameNoRedraw;
 302     wndclass.style        &= ~(CS_HREDRAW | CS_VREDRAW);
 303
 304     if ( !::RegisterClass(&wndclass) )
 305     {
 306         wxLogLastError(wxT("RegisterClass(wxGLCanvasClassNameNoRedraw)"));
 307
 308         ::UnregisterClass(wxGLCanvasClassName, wxhInstance);
 309
 310         return FALSE;
 311     }
 312
 313     s_registeredGLCanvasClass = TRUE;
 314   }
 315
 316   wxCHECK_MSG( parent, FALSE, wxT("can't create wxWindow without parent") );
 317
 318   if ( !CreateBase(parent, id, pos, size, style, wxDefaultValidator, name) )
 319     return FALSE;
 320
 321   parent->AddChild(this);
 322
 323   DWORD msflags = 0;
 324
 325   /*
 326   A general rule with OpenGL and Win32 is that any window that will have a
 327   HGLRC built for it must have two flags:  WS_CLIPCHILDREN & WS_CLIPSIBLINGS.
 328   You can find references about this within the knowledge base and most OpenGL
 329   books that contain the wgl function descriptions.
 330   */
 331
 332   WXDWORD exStyle = 0;
 333   msflags |= WS_CHILD | WS_VISIBLE | WS_CLIPSIBLINGS | WS_CLIPCHILDREN;
 334   msflags |= MSWGetStyle(style, & exStyle) ;
 335
 336   return MSWCreate(wxGLCanvasClassName, NULL, pos, size, msflags, exStyle);
 337 }
 338
 339 static void AdjustPFDForAttributes(PIXELFORMATDESCRIPTOR& pfd, int *attribList)
 340 {
 341   if (attribList) {
 342     pfd.dwFlags &= ~PFD_DOUBLEBUFFER;
 343     pfd.iPixelType = PFD_TYPE_COLORINDEX;
 344     pfd.cColorBits = 0;
 345     int arg=0;
 346
 347     while( (attribList[arg]!=0) )
 348     {
 349       switch( attribList[arg++] )
 350       {
 351         case WX_GL_RGBA:
 352           pfd.iPixelType = PFD_TYPE_RGBA;
 353           break;
 354         case WX_GL_BUFFER_SIZE:
 355           pfd.cColorBits = attribList[arg++];
 356           break;
 357         case WX_GL_LEVEL:
 358           // this member looks like it may be obsolete
 359           if (attribList[arg] > 0) {
 360             pfd.iLayerType = (BYTE)PFD_OVERLAY_PLANE;
 361           } else if (attribList[arg] < 0) {
 362             pfd.iLayerType = (BYTE)PFD_UNDERLAY_PLANE;
 363           } else {
 364             pfd.iLayerType = (BYTE)PFD_MAIN_PLANE;
 365           }
 366           arg++;
 367           break;
 368         case WX_GL_DOUBLEBUFFER:
 369           pfd.dwFlags |= PFD_DOUBLEBUFFER;
 370           break;
 371         case WX_GL_STEREO:
 372           pfd.dwFlags |= PFD_STEREO;
 373           break;
 374         case WX_GL_AUX_BUFFERS:
 375           pfd.cAuxBuffers = attribList[arg++];
 376           break;
 377         case WX_GL_MIN_RED:
 378           pfd.cColorBits += (pfd.cRedBits = attribList[arg++]);
 379           break;
 380         case WX_GL_MIN_GREEN:
 381           pfd.cColorBits += (pfd.cGreenBits = attribList[arg++]);
 382           break;
 383         case WX_GL_MIN_BLUE:
 384           pfd.cColorBits += (pfd.cBlueBits = attribList[arg++]);
 385           break;
 386         case WX_GL_MIN_ALPHA:
 387           // doesn't count in cColorBits
 388           pfd.cAlphaBits = attribList[arg++];
 389           break;
 390         case WX_GL_DEPTH_SIZE:
 391           pfd.cDepthBits = attribList[arg++];
 392           break;
 393         case WX_GL_STENCIL_SIZE:
 394           pfd.cStencilBits = attribList[arg++];
 395           break;
 396         case WX_GL_MIN_ACCUM_RED:
 397           pfd.cAccumBits += (pfd.cAccumRedBits = attribList[arg++]);
 398           break;
 399         case WX_GL_MIN_ACCUM_GREEN:
 400           pfd.cAccumBits += (pfd.cAccumGreenBits = attribList[arg++]);
 401           break;
 402         case WX_GL_MIN_ACCUM_BLUE:
 403           pfd.cAccumBits += (pfd.cAccumBlueBits = attribList[arg++]);
 404           break;
 405         case WX_GL_MIN_ACCUM_ALPHA:
 406           pfd.cAccumBits += (pfd.cAccumAlphaBits = attribList[arg++]);
 407           break;
 408         default:
 409           break;
 410       }
 411     }
 412   }
 413 }
 414
 415 void wxGLCanvas::SetupPixelFormat(int *attribList) // (HDC hDC)
 416 {
 417   PIXELFORMATDESCRIPTOR pfd = {
 418         sizeof(PIXELFORMATDESCRIPTOR),    /* size */
 419         1,                /* version */
 420         PFD_SUPPORT_OPENGL |
 421         PFD_DRAW_TO_WINDOW |
 422         PFD_DOUBLEBUFFER,        /* support double-buffering */
 423         PFD_TYPE_RGBA,            /* color type */
 424         16,                /* prefered color depth */
 425         0, 0, 0, 0, 0, 0,        /* color bits (ignored) */
 426         0,                /* no alpha buffer */
 427         0,                /* alpha bits (ignored) */
 428         0,                /* no accumulation buffer */
 429         0, 0, 0, 0,            /* accum bits (ignored) */
 430         16,                /* depth buffer */
 431         0,                /* no stencil buffer */
 432         0,                /* no auxiliary buffers */
 433         PFD_MAIN_PLANE,            /* main layer */
 434         0,                /* reserved */
 435         0, 0, 0,            /* no layer, visible, damage masks */
 436     };
 437
 438   AdjustPFDForAttributes(pfd, attribList);
 439
 440   int pixelFormat = ChoosePixelFormat((HDC) m_hDC, &pfd);
 441   if (pixelFormat == 0) {
 442     wxLogLastError(_T("ChoosePixelFormat"));
 443   }
 444   else {
 445     if ( !::SetPixelFormat((HDC) m_hDC, pixelFormat, &pfd) ) {
 446       wxLogLastError(_T("SetPixelFormat"));
 447     }
 448   }
 449 }
 450
 451 void wxGLCanvas::SetupPalette(const wxPalette& palette)
 452 {
 453     int pixelFormat = GetPixelFormat((HDC) m_hDC);
 454     PIXELFORMATDESCRIPTOR pfd;
 455
 456     DescribePixelFormat((HDC) m_hDC, pixelFormat, sizeof(PIXELFORMATDESCRIPTOR), &pfd);
 457
 458     if (pfd.dwFlags & PFD_NEED_PALETTE)
 459     {
 460     }
 461     else
 462     {
 463       return;
 464     }
 465
 466     m_palette = palette;
 467
 468     if ( !m_palette.Ok() )
 469     {
 470         m_palette = CreateDefaultPalette();
 471     }
 472
 473     if (m_palette.Ok())
 474     {
 475         SelectPalette((HDC) m_hDC, (HPALETTE) m_palette.GetHPALETTE(), FALSE);
 476         RealizePalette((HDC) m_hDC);
 477     }
 478 }
 479
 480 wxPalette wxGLCanvas::CreateDefaultPalette()
 481 {
 482     PIXELFORMATDESCRIPTOR pfd;
 483     int paletteSize;
 484     int pixelFormat = GetPixelFormat((HDC) m_hDC);
 485
 486     DescribePixelFormat((HDC) m_hDC, pixelFormat, sizeof(PIXELFORMATDESCRIPTOR), &pfd);
 487
 488     paletteSize = 1 << pfd.cColorBits;
 489
 490     LOGPALETTE* pPal =
 491      (LOGPALETTE*) malloc(sizeof(LOGPALETTE) + paletteSize * sizeof(PALETTEENTRY));
 492     pPal->palVersion = 0x300;
 493     pPal->palNumEntries = paletteSize;
 494
 495     /* build a simple RGB color palette */
 496     {
 497     int redMask = (1 << pfd.cRedBits) - 1;
 498     int greenMask = (1 << pfd.cGreenBits) - 1;
 499     int blueMask = (1 << pfd.cBlueBits) - 1;
 500     int i;
 501
 502     for (i=0; i<paletteSize; ++i) {
 503         pPal->palPalEntry[i].peRed =
 504             (((i >> pfd.cRedShift) & redMask) * 255) / redMask;
 505         pPal->palPalEntry[i].peGreen =
 506             (((i >> pfd.cGreenShift) & greenMask) * 255) / greenMask;
 507         pPal->palPalEntry[i].peBlue =
 508             (((i >> pfd.cBlueShift) & blueMask) * 255) / blueMask;
 509         pPal->palPalEntry[i].peFlags = 0;
 510     }
 511     }
 512
 513     HPALETTE hPalette = CreatePalette(pPal);
 514     free(pPal);
 515
 516     wxPalette palette;
 517     palette.SetHPALETTE((WXHPALETTE) hPalette);
 518
 519     return palette;
 520 }
 521
 522 void wxGLCanvas::SwapBuffers()
 523 {
 524   if (m_glContext)
 525     m_glContext->SwapBuffers();
 526 }
 527
 528 void wxGLCanvas::OnSize(wxSizeEvent& WXUNUSED(event))
 529 {
 530 }
 531
 532 void wxGLCanvas::SetCurrent()
 533 {
 534   if (m_glContext)
 535   {
 536     m_glContext->SetCurrent();
 537   }
 538 }
 539
 540 void wxGLCanvas::SetColour(const wxChar *colour)
 541 {
 542   if (m_glContext)
 543     m_glContext->SetColour(colour);
 544 }
 545
 546 // TODO: Have to have this called by parent frame (?)
 547 // So we need wxFrame to call OnQueryNewPalette for all children...
 548 void wxGLCanvas::OnQueryNewPalette(wxQueryNewPaletteEvent& event)
 549 {
 550   /* realize palette if this is the current window */
 551   if ( GetPalette()->Ok() ) {
 552     ::UnrealizeObject((HPALETTE) GetPalette()->GetHPALETTE());
 553     ::SelectPalette((HDC) GetHDC(), (HPALETTE) GetPalette()->GetHPALETTE(), FALSE);
 554     ::RealizePalette((HDC) GetHDC());
 555     Refresh();
 556     event.SetPaletteRealized(TRUE);
 557   }
 558   else
 559     event.SetPaletteRealized(FALSE);
 560 }
 561
 562 // I think this doesn't have to be propagated to child windows.
 563 void wxGLCanvas::OnPaletteChanged(wxPaletteChangedEvent& event)
 564 {
 565   /* realize palette if this is *not* the current window */
 566   if ( GetPalette() &&
 567        GetPalette()->Ok() && (this != event.GetChangedWindow()) )
 568   {
 569     ::UnrealizeObject((HPALETTE) GetPalette()->GetHPALETTE());
 570     ::SelectPalette((HDC) GetHDC(), (HPALETTE) GetPalette()->GetHPALETTE(), FALSE);
 571     ::RealizePalette((HDC) GetHDC());
 572     Refresh();
 573   }
 574 }
 575
 576 /* Give extensions proper function names. */
 577
 578 /* EXT_vertex_array */
 579 void glArrayElementEXT(GLint WXUNUSED(i))
 580 {
 581 }
 582
 583 void glColorPointerEXT(GLint WXUNUSED(size), GLenum WXUNUSED(type), GLsizei WXUNUSED(stride), GLsizei WXUNUSED(count), const GLvoid *WXUNUSED(pointer))
 584 {
 585 }
 586
 587 void glDrawArraysEXT(GLenum mode, GLint first, GLsizei count)
 588 {
 589 #ifdef GL_EXT_vertex_array
 590     static PFNGLDRAWARRAYSEXTPROC proc = 0;
 591
 592     if ( !proc )
 593     {
 594         proc = (PFNGLDRAWARRAYSEXTPROC) wglGetProcAddress("glDrawArraysEXT");
 595     }
 596
 597     if ( proc )
 598         (* proc) (mode, first, count);
 599 #endif
 600 }
 601
 602 void glEdgeFlagPointerEXT(GLsizei WXUNUSED(stride), GLsizei WXUNUSED(count), const GLboolean *WXUNUSED(pointer))
 603 {
 604 }
 605
 606 void glGetPointervEXT(GLenum WXUNUSED(pname), GLvoid* *WXUNUSED(params))
 607 {
 608 }
 609
 610 void glIndexPointerEXT(GLenum WXUNUSED(type), GLsizei WXUNUSED(stride), GLsizei WXUNUSED(count), const GLvoid *WXUNUSED(pointer))
 611 {
 612 }
 613
 614 void glNormalPointerEXT(GLenum type, GLsizei stride, GLsizei count, const GLvoid *pointer)
 615 {
 616 #ifdef GL_EXT_vertex_array
 617   static PFNGLNORMALPOINTEREXTPROC proc = 0;
 618
 619   if ( !proc )
 620   {
 621     proc = (PFNGLNORMALPOINTEREXTPROC) wglGetProcAddress("glNormalPointerEXT");
 622   }
 623
 624   if ( proc )
 625     (* proc) (type, stride, count, pointer);
 626 #endif
 627 }
 628
 629 void glTexCoordPointerEXT(GLint WXUNUSED(size), GLenum WXUNUSED(type), GLsizei WXUNUSED(stride), GLsizei WXUNUSED(count), const GLvoid *WXUNUSED(pointer))
 630 {
 631 }
 632
 633 void glVertexPointerEXT(GLint size, GLenum type, GLsizei stride, GLsizei count, const GLvoid *pointer)
 634 {
 635 #ifdef GL_EXT_vertex_array
 636   static PFNGLVERTEXPOINTEREXTPROC proc = 0;
 637
 638   if ( !proc )
 639   {
 640     proc = (PFNGLVERTEXPOINTEREXTPROC) wglGetProcAddress("glVertexPointerEXT");
 641   }
 642   if ( proc )
 643     (* proc) (size, type, stride, count, pointer);
 644 #endif
 645 }
 646
 647 /* EXT_color_subtable */
 648 void glColorSubtableEXT(GLenum WXUNUSED(target), GLsizei WXUNUSED(start), GLsizei WXUNUSED(count), GLenum WXUNUSED(format), GLenum WXUNUSED(type), const GLvoid *WXUNUSED(table))
 649 {
 650 }
 651
 652 /* EXT_color_table */
 653 void glColorTableEXT(GLenum WXUNUSED(target), GLenum WXUNUSED(internalformat), GLsizei WXUNUSED(width), GLenum WXUNUSED(format), GLenum WXUNUSED(type), const GLvoid *WXUNUSED(table))
 654 {
 655 }
 656
 657 void glCopyColorTableEXT(GLenum WXUNUSED(target), GLenum WXUNUSED(internalformat), GLint WXUNUSED(x), GLint WXUNUSED(y), GLsizei WXUNUSED(width))
 658 {
 659 }
 660
 661 void glGetColorTableEXT(GLenum WXUNUSED(target), GLenum WXUNUSED(format), GLenum WXUNUSED(type), GLvoid *WXUNUSED(table))
 662 {
 663 }
 664
 665 void glGetColorTableParamaterfvEXT(GLenum WXUNUSED(target), GLenum WXUNUSED(pname), GLfloat *WXUNUSED(params))
 666 {
 667 }
 668
 669 void glGetColorTavleParameterivEXT(GLenum WXUNUSED(target), GLenum WXUNUSED(pname), GLint *WXUNUSED(params))
 670 {
 671 }
 672
 673 /* SGI_compiled_vertex_array */
 674 void glLockArraysSGI(GLint WXUNUSED(first), GLsizei WXUNUSED(count))
 675 {
 676 }
 677
 678 void glUnlockArraysSGI()
 679 {
 680 }
 681
 682
 683 /* SGI_cull_vertex */
 684 void glCullParameterdvSGI(GLenum WXUNUSED(pname), GLdouble* WXUNUSED(params))
 685 {
 686 }
 687
 688 void glCullParameterfvSGI(GLenum WXUNUSED(pname), GLfloat* WXUNUSED(params))
 689 {
 690 }
 691
 692 /* SGI_index_func */
 693 void glIndexFuncSGI(GLenum WXUNUSED(func), GLclampf WXUNUSED(ref))
 694 {
 695 }
 696
 697 /* SGI_index_material */
 698 void glIndexMaterialSGI(GLenum WXUNUSED(face), GLenum WXUNUSED(mode))
 699 {
 700 }
 701
 702 /* WIN_swap_hint */
 703 void glAddSwapHintRectWin(GLint WXUNUSED(x), GLint WXUNUSED(y), GLsizei WXUNUSED(width), GLsizei WXUNUSED(height))
 704 {
 705 }
 706
 707
 708 //---------------------------------------------------------------------------
 709 // wxGLApp
 710 //---------------------------------------------------------------------------
 711
 712 IMPLEMENT_CLASS(wxGLApp, wxApp)
 713
 714 bool wxGLApp::InitGLVisual(int *attribList)
 715 {
 716   int pixelFormat;
 717   PIXELFORMATDESCRIPTOR pfd = {
 718         sizeof(PIXELFORMATDESCRIPTOR),    /* size */
 719         1,                /* version */
 720         PFD_SUPPORT_OPENGL |
 721         PFD_DRAW_TO_WINDOW |
 722         PFD_DOUBLEBUFFER,        /* support double-buffering */
 723         PFD_TYPE_RGBA,            /* color type */
 724         16,                /* prefered color depth */
 725         0, 0, 0, 0, 0, 0,        /* color bits (ignored) */
 726         0,                /* no alpha buffer */
 727         0,                /* alpha bits (ignored) */
 728         0,                /* no accumulation buffer */
 729         0, 0, 0, 0,            /* accum bits (ignored) */
 730         16,                /* depth buffer */
 731         0,                /* no stencil buffer */
 732         0,                /* no auxiliary buffers */
 733         PFD_MAIN_PLANE,            /* main layer */
 734         0,                /* reserved */
 735         0, 0, 0,            /* no layer, visible, damage masks */
 736     };
 737
 738   AdjustPFDForAttributes(pfd, attribList);
 739
 740   // use DC for whole (root) screen, since no windows have yet been created
 741   pixelFormat = ChoosePixelFormat(ScreenHDC(), &pfd);
 742
 743   if (pixelFormat == 0) {
 744     wxLogError(_("Failed to initialize OpenGL"));
 745     return FALSE;
 746   }
 747
 748   return TRUE;
 749 }
 750
 751 wxGLApp::~wxGLApp()
 752 {
 753 }
 754
 755 #endif
 756     // wxUSE_GLCANVAS