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 #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 #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 #endif
  30
  31 #include "wx/msw/private.h"
  32
  33 #include "wx/glcanvas.h"
  34
  35 static const wxChar *wxGLCanvasClassName = wxT("wxGLCanvasClass");
  36 static const wxChar *wxGLCanvasClassNameNoRedraw = wxT("wxGLCanvasClassNR");
  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 wxChar *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, wxWindow)
 128
 129 BEGIN_EVENT_TABLE(wxGLCanvas, wxWindow)
 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) : wxWindow()
 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::GetColour(wxSYS_COLOUR_3DFACE));
 146     SetFont(wxSystemSettings::GetFont(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   : wxWindow()
 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::GetColour(wxSYS_COLOUR_3DFACE));
 170     SetFont(wxSystemSettings::GetFont(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   wxWindow()
 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::GetColour(wxSYS_COLOUR_3DFACE));
 195     SetFont(wxSystemSettings::GetFont(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
 217 // window class
 218 bool wxGLCanvas::Create(wxWindow *parent,
 219                         wxWindowID id,
 220                         const wxPoint& pos,
 221                         const wxSize& size,
 222                         long style,
 223                         const wxString& name)
 224 {
 225   static bool s_registeredGLCanvasClass = FALSE;
 226
 227   // We have to register a special window class because we need
 228   // the CS_OWNDC style for GLCanvas.
 229
 230   /*
 231   From Angel Popov <jumpo@bitex.com>
 232
 233   Here are two snips from a dicussion in the OpenGL Gamedev list that explains
 234   how this problem can be fixed:
 235
 236   "There are 5 common DCs available in Win95. These are aquired when you call
 237   GetDC or GetDCEx from a window that does _not_ have the OWNDC flag.
 238   OWNDC flagged windows do not get their DC from the common DC pool, the issue
 239   is they require 800 bytes each from the limited 64Kb local heap for GDI."
 240
 241   "The deal is, if you hold onto one of the 5 shared DC's too long (as GL apps
 242   do), Win95 will actually "steal" it from you.  MakeCurrent fails,
 243   apparently, because Windows re-assigns the HDC to a different window.  The
 244   only way to prevent this, the only reliable means, is to set CS_OWNDC."
 245   */
 246
 247   if (!s_registeredGLCanvasClass)
 248   {
 249     WNDCLASS wndclass;
 250
 251     // the fields which are common to all classes
 252     wndclass.lpfnWndProc   = (WNDPROC)wxWndProc;
 253     wndclass.cbClsExtra    = 0;
 254     wndclass.cbWndExtra    = sizeof( DWORD ); // VZ: what is this DWORD used for?
 255     wndclass.hInstance     = wxhInstance;
 256     wndclass.hIcon         = (HICON) NULL;
 257     wndclass.hCursor       = ::LoadCursor((HINSTANCE)NULL, IDC_ARROW);
 258     wndclass.lpszMenuName  = NULL;
 259
 260     // Register the GLCanvas class name
 261     wndclass.hbrBackground = (HBRUSH)NULL;
 262     wndclass.lpszClassName = wxGLCanvasClassName;
 263     wndclass.style         = CS_HREDRAW | CS_VREDRAW | CS_DBLCLKS | CS_OWNDC;
 264
 265     if ( !::RegisterClass(&wndclass) )
 266     {
 267       wxLogLastError(wxT("RegisterClass(wxGLCanvasClass)"));
 268       return FALSE;
 269     }
 270
 271     // Register the GLCanvas class name for windows which don't do full repaint
 272     // on resize
 273     wndclass.lpszClassName = wxGLCanvasClassNameNoRedraw;
 274     wndclass.style        &= ~(CS_HREDRAW | CS_VREDRAW);
 275
 276     if ( !::RegisterClass(&wndclass) )
 277     {
 278         wxLogLastError(wxT("RegisterClass(wxGLCanvasClassNameNoRedraw)"));
 279
 280         ::UnregisterClass(wxGLCanvasClassName, wxhInstance);
 281
 282         return FALSE;
 283     }
 284
 285     s_registeredGLCanvasClass = TRUE;
 286   }
 287
 288   wxCHECK_MSG( parent, FALSE, wxT("can't create wxWindow without parent") );
 289
 290   if ( !CreateBase(parent, id, pos, size, style, wxDefaultValidator, name) )
 291     return FALSE;
 292
 293   parent->AddChild(this);
 294
 295   DWORD msflags = 0;
 296   if ( style & wxBORDER )
 297     msflags |= WS_BORDER;
 298   if ( style & wxTHICK_FRAME )
 299     msflags |= WS_THICKFRAME;
 300
 301   /*
 302   A general rule with OpenGL and Win32 is that any window that will have a
 303   HGLRC built for it must have two flags:  WS_CLIPCHILDREN & WS_CLIPSIBLINGS.
 304   You can find references about this within the knowledge base and most OpenGL
 305   books that contain the wgl function descriptions.
 306   */
 307
 308   msflags |= WS_CHILD | WS_VISIBLE | WS_CLIPSIBLINGS | 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   return MSWCreate(wxGLCanvasClassName, NULL, pos, size, msflags, exStyle);
 322 }
 323
 324 static void AdjustPFDForAttributes(PIXELFORMATDESCRIPTOR& pfd, int *attribList)
 325 {
 326   if (attribList) {
 327     pfd.dwFlags &= ~PFD_DOUBLEBUFFER;
 328     pfd.iPixelType = PFD_TYPE_COLORINDEX;
 329     pfd.cColorBits = 0;
 330     int arg=0;
 331
 332     while( (attribList[arg]!=0) )
 333     {
 334       switch( attribList[arg++] )
 335       {
 336         case WX_GL_RGBA:
 337           pfd.iPixelType = PFD_TYPE_RGBA;
 338           break;
 339         case WX_GL_BUFFER_SIZE:
 340           pfd.cColorBits = attribList[arg++];
 341           break;
 342         case WX_GL_LEVEL:
 343           // this member looks like it may be obsolete
 344           if (attribList[arg] > 0) {
 345             pfd.iLayerType = (BYTE)PFD_OVERLAY_PLANE;
 346           } else if (attribList[arg] < 0) {
 347             pfd.iLayerType = (BYTE)PFD_UNDERLAY_PLANE;
 348           } else {
 349             pfd.iLayerType = (BYTE)PFD_MAIN_PLANE;
 350           }
 351           arg++;
 352           break;
 353         case WX_GL_DOUBLEBUFFER:
 354           pfd.dwFlags |= PFD_DOUBLEBUFFER;
 355           break;
 356         case WX_GL_STEREO:
 357           pfd.dwFlags |= PFD_STEREO;
 358           break;
 359         case WX_GL_AUX_BUFFERS:
 360           pfd.cAuxBuffers = attribList[arg++];
 361           break;
 362         case WX_GL_MIN_RED:
 363           pfd.cColorBits += (pfd.cRedBits = attribList[arg++]);
 364           break;
 365         case WX_GL_MIN_GREEN:
 366           pfd.cColorBits += (pfd.cGreenBits = attribList[arg++]);
 367           break;
 368         case WX_GL_MIN_BLUE:
 369           pfd.cColorBits += (pfd.cBlueBits = attribList[arg++]);
 370           break;
 371         case WX_GL_MIN_ALPHA:
 372           // doesn't count in cColorBits
 373           pfd.cAlphaBits = attribList[arg++];
 374           break;
 375         case WX_GL_DEPTH_SIZE:
 376           pfd.cDepthBits = attribList[arg++];
 377           break;
 378         case WX_GL_STENCIL_SIZE:
 379           pfd.cStencilBits = attribList[arg++];
 380           break;
 381         case WX_GL_MIN_ACCUM_RED:
 382           pfd.cAccumBits += (pfd.cAccumRedBits = attribList[arg++]);
 383           break;
 384         case WX_GL_MIN_ACCUM_GREEN:
 385           pfd.cAccumBits += (pfd.cAccumGreenBits = attribList[arg++]);
 386           break;
 387         case WX_GL_MIN_ACCUM_BLUE:
 388           pfd.cAccumBits += (pfd.cAccumBlueBits = attribList[arg++]);
 389           break;
 390         case WX_GL_MIN_ACCUM_ALPHA:
 391           pfd.cAccumBits += (pfd.cAccumAlphaBits = attribList[arg++]);
 392           break;
 393         default:
 394           break;
 395       }
 396     }
 397   }
 398 }
 399
 400 void wxGLCanvas::SetupPixelFormat(int *attribList) // (HDC hDC)
 401 {
 402   PIXELFORMATDESCRIPTOR pfd = {
 403         sizeof(PIXELFORMATDESCRIPTOR),    /* size */
 404         1,                /* version */
 405         PFD_SUPPORT_OPENGL |
 406         PFD_DRAW_TO_WINDOW |
 407         PFD_DOUBLEBUFFER,        /* support double-buffering */
 408         PFD_TYPE_RGBA,            /* color type */
 409         16,                /* prefered color depth */
 410         0, 0, 0, 0, 0, 0,        /* color bits (ignored) */
 411         0,                /* no alpha buffer */
 412         0,                /* alpha bits (ignored) */
 413         0,                /* no accumulation buffer */
 414         0, 0, 0, 0,            /* accum bits (ignored) */
 415         16,                /* depth buffer */
 416         0,                /* no stencil buffer */
 417         0,                /* no auxiliary buffers */
 418         PFD_MAIN_PLANE,            /* main layer */
 419         0,                /* reserved */
 420         0, 0, 0,            /* no layer, visible, damage masks */
 421     };
 422
 423   AdjustPFDForAttributes(pfd, attribList);
 424
 425   int pixelFormat = ChoosePixelFormat((HDC) m_hDC, &pfd);
 426   if (pixelFormat == 0) {
 427     wxLogLastError(_T("ChoosePixelFormat"));
 428   }
 429   else {
 430     if ( !::SetPixelFormat((HDC) m_hDC, pixelFormat, &pfd) ) {
 431       wxLogLastError(_T("SetPixelFormat"));
 432     }
 433   }
 434 }
 435
 436 void wxGLCanvas::SetupPalette(const wxPalette& palette)
 437 {
 438     int pixelFormat = GetPixelFormat((HDC) m_hDC);
 439     PIXELFORMATDESCRIPTOR pfd;
 440
 441     DescribePixelFormat((HDC) m_hDC, pixelFormat, sizeof(PIXELFORMATDESCRIPTOR), &pfd);
 442
 443     if (pfd.dwFlags & PFD_NEED_PALETTE)
 444     {
 445     }
 446     else
 447     {
 448       return;
 449     }
 450
 451     m_palette = palette;
 452
 453     if ( !m_palette.Ok() )
 454     {
 455         m_palette = CreateDefaultPalette();
 456     }
 457
 458     if (m_palette.Ok())
 459     {
 460         SelectPalette((HDC) m_hDC, (HPALETTE) m_palette.GetHPALETTE(), FALSE);
 461         RealizePalette((HDC) m_hDC);
 462     }
 463 }
 464
 465 wxPalette wxGLCanvas::CreateDefaultPalette()
 466 {
 467     PIXELFORMATDESCRIPTOR pfd;
 468     int paletteSize;
 469     int pixelFormat = GetPixelFormat((HDC) m_hDC);
 470
 471     DescribePixelFormat((HDC) m_hDC, pixelFormat, sizeof(PIXELFORMATDESCRIPTOR), &pfd);
 472
 473     paletteSize = 1 << pfd.cColorBits;
 474
 475     LOGPALETTE* pPal =
 476      (LOGPALETTE*) malloc(sizeof(LOGPALETTE) + paletteSize * sizeof(PALETTEENTRY));
 477     pPal->palVersion = 0x300;
 478     pPal->palNumEntries = paletteSize;
 479
 480     /* build a simple RGB color palette */
 481     {
 482     int redMask = (1 << pfd.cRedBits) - 1;
 483     int greenMask = (1 << pfd.cGreenBits) - 1;
 484     int blueMask = (1 << pfd.cBlueBits) - 1;
 485     int i;
 486
 487     for (i=0; i<paletteSize; ++i) {
 488         pPal->palPalEntry[i].peRed =
 489             (((i >> pfd.cRedShift) & redMask) * 255) / redMask;
 490         pPal->palPalEntry[i].peGreen =
 491             (((i >> pfd.cGreenShift) & greenMask) * 255) / greenMask;
 492         pPal->palPalEntry[i].peBlue =
 493             (((i >> pfd.cBlueShift) & blueMask) * 255) / blueMask;
 494         pPal->palPalEntry[i].peFlags = 0;
 495     }
 496     }
 497
 498     HPALETTE hPalette = CreatePalette(pPal);
 499     free(pPal);
 500
 501     wxPalette palette;
 502     palette.SetHPALETTE((WXHPALETTE) hPalette);
 503
 504     return palette;
 505 }
 506
 507 void wxGLCanvas::SwapBuffers()
 508 {
 509   if (m_glContext)
 510     m_glContext->SwapBuffers();
 511 }
 512
 513 void wxGLCanvas::OnSize(wxSizeEvent& event)
 514 {
 515 }
 516
 517 void wxGLCanvas::SetCurrent()
 518 {
 519   if (m_glContext)
 520   {
 521     m_glContext->SetCurrent();
 522   }
 523 }
 524
 525 void wxGLCanvas::SetColour(const wxChar *colour)
 526 {
 527   if (m_glContext)
 528     m_glContext->SetColour(colour);
 529 }
 530
 531 // TODO: Have to have this called by parent frame (?)
 532 // So we need wxFrame to call OnQueryNewPalette for all children...
 533 void wxGLCanvas::OnQueryNewPalette(wxQueryNewPaletteEvent& event)
 534 {
 535   /* realize palette if this is the current window */
 536   if ( GetPalette()->Ok() ) {
 537     ::UnrealizeObject((HPALETTE) GetPalette()->GetHPALETTE());
 538     ::SelectPalette((HDC) GetHDC(), (HPALETTE) GetPalette()->GetHPALETTE(), FALSE);
 539     ::RealizePalette((HDC) GetHDC());
 540     Refresh();
 541     event.SetPaletteRealized(TRUE);
 542   }
 543   else
 544     event.SetPaletteRealized(FALSE);
 545 }
 546
 547 // I think this doesn't have to be propagated to child windows.
 548 void wxGLCanvas::OnPaletteChanged(wxPaletteChangedEvent& event)
 549 {
 550   /* realize palette if this is *not* the current window */
 551   if ( GetPalette() &&
 552        GetPalette()->Ok() && (this != event.GetChangedWindow()) )
 553   {
 554     ::UnrealizeObject((HPALETTE) GetPalette()->GetHPALETTE());
 555     ::SelectPalette((HDC) GetHDC(), (HPALETTE) GetPalette()->GetHPALETTE(), FALSE);
 556     ::RealizePalette((HDC) GetHDC());
 557     Refresh();
 558   }
 559 }
 560
 561 /* Give extensions proper function names. */
 562
 563 /* EXT_vertex_array */
 564 void glArrayElementEXT(GLint i)
 565 {
 566 }
 567
 568 void glColorPointerEXT(GLint size, GLenum type, GLsizei stride, GLsizei count, const GLvoid *pointer)
 569 {
 570 }
 571
 572 void glDrawArraysEXT(GLenum mode, GLint first, GLsizei count)
 573 {
 574 #ifdef GL_EXT_vertex_array
 575     static PFNGLDRAWARRAYSEXTPROC proc = 0;
 576
 577     if ( !proc )
 578     {
 579         proc = (PFNGLDRAWARRAYSEXTPROC) wglGetProcAddress("glDrawArraysEXT");
 580     }
 581
 582     if ( proc )
 583         (* proc) (mode, first, count);
 584 #endif
 585 }
 586
 587 void glEdgeFlagPointerEXT(GLsizei stride, GLsizei count, const GLboolean *pointer)
 588 {
 589 }
 590
 591 void glGetPointervEXT(GLenum pname, GLvoid* *params)
 592 {
 593 }
 594
 595 void glIndexPointerEXT(GLenum type, GLsizei stride, GLsizei count, const GLvoid *pointer)
 596 {
 597 }
 598
 599 void glNormalPointerEXT(GLenum type, GLsizei stride, GLsizei count, const GLvoid *pointer)
 600 {
 601 #ifdef GL_EXT_vertex_array
 602   static PFNGLNORMALPOINTEREXTPROC proc = 0;
 603
 604   if ( !proc )
 605   {
 606     proc = (PFNGLNORMALPOINTEREXTPROC) wglGetProcAddress("glNormalPointerEXT");
 607   }
 608
 609   if ( proc )
 610     (* proc) (type, stride, count, pointer);
 611 #endif
 612 }
 613
 614 void glTexCoordPointerEXT(GLint size, GLenum type, GLsizei stride, GLsizei count, const GLvoid *pointer)
 615 {
 616 }
 617
 618 void glVertexPointerEXT(GLint size, GLenum type, GLsizei stride, GLsizei count, const GLvoid *pointer)
 619 {
 620 #ifdef GL_EXT_vertex_array
 621   static PFNGLVERTEXPOINTEREXTPROC proc = 0;
 622
 623   if ( !proc )
 624   {
 625     proc = (PFNGLVERTEXPOINTEREXTPROC) wglGetProcAddress("glVertexPointerEXT");
 626   }
 627   if ( proc )
 628     (* proc) (size, type, stride, count, pointer);
 629 #endif
 630 }
 631
 632 /* EXT_color_subtable */
 633 void glColorSubtableEXT(GLenum target, GLsizei start, GLsizei count, GLenum format, GLenum type, const GLvoid *table)
 634 {
 635 }
 636
 637 /* EXT_color_table */
 638 void glColorTableEXT(GLenum target, GLenum internalformat, GLsizei width, GLenum format, GLenum type, const GLvoid *table)
 639 {
 640 }
 641
 642 void glCopyColorTableEXT(GLenum target, GLenum internalformat, GLint x, GLint y, GLsizei width)
 643 {
 644 }
 645
 646 void glGetColorTableEXT(GLenum target, GLenum format, GLenum type, GLvoid *table)
 647 {
 648 }
 649
 650 void glGetColorTableParamaterfvEXT(GLenum target, GLenum pname, GLfloat *params)
 651 {
 652 }
 653
 654 void glGetColorTavleParameterivEXT(GLenum target, GLenum pname, GLint *params)
 655 {
 656 }
 657
 658 /* SGI_compiled_vertex_array */
 659 void glLockArraysSGI(GLint first, GLsizei count)
 660 {
 661 }
 662
 663 void glUnlockArraysSGI()
 664 {
 665 }
 666
 667
 668 /* SGI_cull_vertex */
 669 void glCullParameterdvSGI(GLenum pname, GLdouble* params)
 670 {
 671 }
 672
 673 void glCullParameterfvSGI(GLenum pname, GLfloat* params)
 674 {
 675 }
 676
 677 /* SGI_index_func */
 678 void glIndexFuncSGI(GLenum func, GLclampf ref)
 679 {
 680 }
 681
 682 /* SGI_index_material */
 683 void glIndexMaterialSGI(GLenum face, GLenum mode)
 684 {
 685 }
 686
 687 /* WIN_swap_hint */
 688 void glAddSwapHintRectWin(GLint x, GLint y, GLsizei width, GLsizei height)
 689 {
 690 }
 691
 692
 693 //---------------------------------------------------------------------------
 694 // wxGLApp
 695 //---------------------------------------------------------------------------
 696
 697 IMPLEMENT_CLASS(wxGLApp, wxApp)
 698
 699 bool wxGLApp::InitGLVisual(int *attribList)
 700 {
 701   int pixelFormat;
 702   PIXELFORMATDESCRIPTOR pfd = {
 703         sizeof(PIXELFORMATDESCRIPTOR),    /* size */
 704         1,                /* version */
 705         PFD_SUPPORT_OPENGL |
 706         PFD_DRAW_TO_WINDOW |
 707         PFD_DOUBLEBUFFER,        /* support double-buffering */
 708         PFD_TYPE_RGBA,            /* color type */
 709         16,                /* prefered color depth */
 710         0, 0, 0, 0, 0, 0,        /* color bits (ignored) */
 711         0,                /* no alpha buffer */
 712         0,                /* alpha bits (ignored) */
 713         0,                /* no accumulation buffer */
 714         0, 0, 0, 0,            /* accum bits (ignored) */
 715         16,                /* depth buffer */
 716         0,                /* no stencil buffer */
 717         0,                /* no auxiliary buffers */
 718         PFD_MAIN_PLANE,            /* main layer */
 719         0,                /* reserved */
 720         0, 0, 0,            /* no layer, visible, damage masks */
 721     };
 722
 723   AdjustPFDForAttributes(pfd, attribList);
 724
 725   // use DC for whole (root) screen, since no windows have yet been created
 726   pixelFormat = ChoosePixelFormat(ScreenHDC(), &pfd);
 727
 728   if (pixelFormat == 0) {
 729     wxLogError(_("Failed to initialize OpenGL"));
 730     return FALSE;
 731   }
 732
 733   return TRUE;
 734 }
 735
 736 wxGLApp::~wxGLApp()
 737 {
 738 }
 739
 740 #endif
 741     // wxUSE_GLCANVAS