svn merge -r588:HEAD ^/branches/released .

1 files changed, 2464 insertions, 2464 deletions

diff --git a/xorg-server/hw/xwin/glx/indirect.c b/xorg-server/hw/xwin/glx/indirect.c
index 48094a69e..08c16f85d 100644
--- a/xorg-server/hw/xwin/glx/indirect.c
+++ b/xorg-server/hw/xwin/glx/indirect.c
@@ -1,2464 +1,2464 @@
-/*
- * File: indirect.c
- * Purpose: A GLX implementation that uses Windows OpenGL library
- *
- * Authors: Alexander Gottwald
- *          Jon TURNEY
- *
- * Copyright (c) Jon TURNEY 2009
- * Copyright (c) Alexander Gottwald 2004
- *
- * Portions of this file are copied from GL/apple/indirect.c,
- * which contains the following copyright:
- *
- * Copyright (c) 2007, 2008, 2009 Apple Inc.
- * Copyright (c) 2004 Torrey T. Lyons. All Rights Reserved.
- * Copyright (c) 2002 Greg Parker. All Rights Reserved.
- *
- * Portions of this file are copied from Mesa's xf86glx.c,
- * which contains the following copyright:
- *
- * Copyright 1998-1999 Precision Insight, Inc., Cedar Park, Texas.
- * All Rights Reserved.
- *
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * THE ABOVE LISTED COPYRIGHT HOLDER(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
- * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
- * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
- * DEALINGS IN THE SOFTWARE.
- */
-
-/*
-  TODO:
-  - hook up remaining unimplemented extensions
-  - research what guarantees glXWaitX, glXWaitGL are supposed to offer, and implement then
-    using GdiFlush and/or glFinish
-  - pbuffer clobbering: we don't get async notification, but can we arrange to emit the
-    event when we notice it's been clobbered? at the very least, check if it's been clobbered
-    before using it?
-  - are the __GLXConfig * we get handed back ones we are made (so we can extend the structure
-    with privates?) Or are they created inside the GLX core as well?
-*/
-
-/*
-  MSDN clarifications:
-
-  It says SetPixelFormat()'s PIXELFORMATDESCRIPTOR pointer argument has no effect
-  except on metafiles, this seems to mean that as it's ok to supply NULL if the DC
-  is not for a metafile
-
-  wglMakeCurrent ignores the hdc if hglrc is NULL, so wglMakeCurrent(NULL, NULL)
-  is used to make no context current
-
-*/
-
-#ifdef HAVE_XWIN_CONFIG_H
-#include <xwin-config.h>
-#endif
-
-#include "glwindows.h"
-#include <glx/glxserver.h>
-#include <glx/glxutil.h>
-#include <glx/extension_string.h>
-#include <GL/glxtokens.h>
-
-#include <winpriv.h>
-#include <wgl_ext_api.h>
-#include "win.h"
-#include <winmsg.h>
-
-extern Bool			g_fXdmcpEnabled;
-extern Bool g_fNativeGl;
-
-#define NUM_ELEMENTS(x) (sizeof(x)/ sizeof(x[1]))
-
-/* ---------------------------------------------------------------------- */
-/*
- *   structure definitions
- */
-
-typedef struct __GLXWinContext  __GLXWinContext;
-typedef struct __GLXWinDrawable __GLXWinDrawable;
-typedef struct __GLXWinScreen glxWinScreen;
-typedef struct __GLXWinConfig GLXWinConfig;
-
-struct __GLXWinContext {
-  __GLXcontext base;
-  HGLRC ctx;                         /* Windows GL Context */
-  HDC hDC;                           /* Windows device context */
-  HDC hreadDC;                     /* Windows device read context */
-  __GLXWinContext *shareContext;     /* Context with which we will share display lists and textures */
-  HWND hwnd;                         /* For detecting when HWND has changed */
-  HWND hreadwnd;
-};
-
-struct __GLXWinDrawable
-{
-  __GLXdrawable base;
-  __GLXWinContext *drawContext;
-
-  /* If this drawable is GLX_DRAWABLE_PBUFFER */
-  HPBUFFERARB hPbuffer;
-
-  /* If this drawable is GLX_DRAWABLE_PIXMAP */
-  HDC dibDC;
-  HBITMAP hDIB;
-  HBITMAP hOldDIB; /* original DIB for DC */
-  void *pOldBits; /* original pBits for this drawable's pixmap */
-};
-
-struct __GLXWinScreen
-{
-  __GLXscreen base;
-
-  /* Supported GLX extensions */
-  unsigned char glx_enable_bits[__GLX_EXT_BYTES];
-
-  Bool has_WGL_ARB_multisample;
-  Bool has_WGL_ARB_pixel_format;
-  Bool has_WGL_ARB_pbuffer;
-  Bool has_WGL_ARB_render_texture;
-
-  /* wrapped screen functions */
-  RealizeWindowProcPtr RealizeWindow;
-  UnrealizeWindowProcPtr UnrealizeWindow;
-  DestroyWindowProcPtr DestroyWindow;
-  CopyWindowProcPtr CopyWindow;
-  PositionWindowProcPtr PositionWindow;
-};
-
-struct __GLXWinConfig
-{
-  __GLXconfig base;
-  int pixelFormatIndex;
-};
-
-/* ---------------------------------------------------------------------- */
-/*
- * Various debug helpers
- */
-
-#ifdef _DEBUG
-void GLWIN_DEBUG_HWND(HWND hwnd)
-{
-  if (glxWinDebugSettings.dumpHWND)
-  {
-    char buffer[1024];
-    RECT Rect;
-    HDC hDc=GetDC(hwnd);
-
-    if (GetWindowText(hwnd, buffer, sizeof(buffer))==0) *buffer=0;
-    GetWindowRect(hwnd,&Rect);
-
-    GLWIN_DEBUG_MSG("Got HWND %p (hdc %p) for window '%s' (%d,%d,%d,%d)", hwnd, hDc, buffer, Rect.left, Rect.top, Rect.right, Rect.bottom);
-    ReleaseDC(hwnd,hDc);
-  }
-}
-
-void GLWIN_HDC_DEBUG_MSG(const char *Message, HDC hDc, HWND hwnd)
-{
-    char buffer[1024];
-    RECT Rect;
-
-    if (GetWindowText(hwnd, buffer, sizeof(buffer))==0) *buffer=0;
-    GetWindowRect(hwnd,&Rect);
-
-    GLWIN_DEBUG_MSG("Got HDC %p (hwnd %p) for window '%s' (%d,%d,%d,%d)", hDc, hwnd, buffer, Rect.left, Rect.top, Rect.right, Rect.bottom);
-
-}
-
-glxWinDebugSettingsRec glxWinDebugSettings = { 0, 0, 0, 0, 0, 0};
-
-static void glxWinInitDebugSettings(void)
-{
-    char *envptr;
-
-    envptr = getenv("GLWIN_ENABLE_DEBUG");
-    if (envptr != NULL)
-        glxWinDebugSettings.enableDebug = (atoi(envptr) == 1);
-
-    envptr = getenv("GLWIN_ENABLE_TRACE");
-    if (envptr != NULL)
-        glxWinDebugSettings.enableTrace = (atoi(envptr) == 1);
-
-    envptr = getenv("GLWIN_DUMP_PFD");
-    if (envptr != NULL)
-        glxWinDebugSettings.dumpPFD = (atoi(envptr) == 1);
-
-    envptr = getenv("GLWIN_DUMP_HWND");
-    if (envptr != NULL)
-        glxWinDebugSettings.dumpHWND = (atoi(envptr) == 1);
-
-    envptr = getenv("GLWIN_DUMP_DC");
-    if (envptr != NULL)
-        glxWinDebugSettings.dumpDC = (atoi(envptr) == 1);
-
-    envptr = getenv("GLWIN_ENABLE_GLCALL_TRACE");
-    if (envptr != NULL)
-        glxWinDebugSettings.enableGLcallTrace = (atoi(envptr) == 1);
-
-    envptr = getenv("GLWIN_ENABLE_WGLCALL_TRACE");
-    if (envptr != NULL)
-        glxWinDebugSettings.enableWGLcallTrace = (atoi(envptr) == 1);
-
-    envptr = getenv("GLWIN_DEBUG_ALL");
-    if (envptr != NULL)
-      {
-        glxWinDebugSettings.enableDebug = 1;
-        glxWinDebugSettings.enableTrace = 1;
-        glxWinDebugSettings.dumpPFD = 1;
-        glxWinDebugSettings.dumpHWND = 1;
-        glxWinDebugSettings.dumpDC = 1;
-        glxWinDebugSettings.enableGLcallTrace = 1;
-        glxWinDebugSettings.enableWGLcallTrace = 1;
-      }
-}
-#endif
-
-static
-const char *glxWinErrorMessage(void)
-{
-  static char errorbuffer[1024];
-  DWORD Error=GetLastError();
-  int offset;
-  
-  sprintf(errorbuffer, "%p ",Error);
-  offset=strlen(errorbuffer);
-
-  if (!FormatMessage(
-                     FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
-                     NULL,
-                     Error,
-                     MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
-                     (LPTSTR) &errorbuffer[offset],
-                     sizeof(errorbuffer),
-                     NULL ))
-    {
-      snprintf(errorbuffer, sizeof(errorbuffer), "Unknown error in FormatMessage: %08x!", (unsigned)GetLastError());
-    }
-
-  if (errorbuffer[strlen(errorbuffer)-1] == '\n')
-    errorbuffer[strlen(errorbuffer)-1] = 0;
-
-  return errorbuffer;
-}
-
-static void pfdOut(const PIXELFORMATDESCRIPTOR *pfd);
-
-#ifdef _DEBUG
-
-#define DUMP_PFD_FLAG(flag) \
-    if (pfd->dwFlags & flag) { \
-        ErrorF("%s%s", pipesym, #flag); \
-        pipesym = " | "; \
-    }
-
-static void pfdOut(const PIXELFORMATDESCRIPTOR *pfd)
-{
-    const char *pipesym = ""; /* will be set after first flag dump */
-    ErrorF("PIXELFORMATDESCRIPTOR:\n");
-    ErrorF("nSize = %u\n", pfd->nSize);
-    ErrorF("nVersion = %u\n", pfd->nVersion);
-    ErrorF("dwFlags = %lu = {", pfd->dwFlags);
-        DUMP_PFD_FLAG(PFD_DOUBLEBUFFER);
-        DUMP_PFD_FLAG(PFD_STEREO);
-        DUMP_PFD_FLAG(PFD_DRAW_TO_WINDOW);
-        DUMP_PFD_FLAG(PFD_DRAW_TO_BITMAP);
-        DUMP_PFD_FLAG(PFD_SUPPORT_GDI);
-        DUMP_PFD_FLAG(PFD_SUPPORT_OPENGL);
-        DUMP_PFD_FLAG(PFD_GENERIC_FORMAT);
-        DUMP_PFD_FLAG(PFD_NEED_PALETTE);
-        DUMP_PFD_FLAG(PFD_NEED_SYSTEM_PALETTE);
-        DUMP_PFD_FLAG(PFD_SWAP_EXCHANGE);
-        DUMP_PFD_FLAG(PFD_SWAP_COPY);
-        DUMP_PFD_FLAG(PFD_SWAP_LAYER_BUFFERS);
-        DUMP_PFD_FLAG(PFD_GENERIC_ACCELERATED);
-        DUMP_PFD_FLAG(PFD_DEPTH_DONTCARE);
-        DUMP_PFD_FLAG(PFD_DOUBLEBUFFER_DONTCARE);
-        DUMP_PFD_FLAG(PFD_STEREO_DONTCARE);
-    ErrorF("}\n");
-
-    ErrorF("iPixelType = %hu = %s\n", pfd->iPixelType,
-            (pfd->iPixelType == PFD_TYPE_RGBA ? "PFD_TYPE_RGBA" : "PFD_TYPE_COLORINDEX"));
-    ErrorF("cColorBits = %hhu\n", pfd->cColorBits);
-    ErrorF("cRedBits = %hhu\n", pfd->cRedBits);
-    ErrorF("cRedShift = %hhu\n", pfd->cRedShift);
-    ErrorF("cGreenBits = %hhu\n", pfd->cGreenBits);
-    ErrorF("cGreenShift = %hhu\n", pfd->cGreenShift);
-    ErrorF("cBlueBits = %hhu\n", pfd->cBlueBits);
-    ErrorF("cBlueShift = %hhu\n", pfd->cBlueShift);
-    ErrorF("cAlphaBits = %hhu\n", pfd->cAlphaBits);
-    ErrorF("cAlphaShift = %hhu\n", pfd->cAlphaShift);
-    ErrorF("cAccumBits = %hhu\n", pfd->cAccumBits);
-    ErrorF("cAccumRedBits = %hhu\n", pfd->cAccumRedBits);
-    ErrorF("cAccumGreenBits = %hhu\n", pfd->cAccumGreenBits);
-    ErrorF("cAccumBlueBits = %hhu\n", pfd->cAccumBlueBits);
-    ErrorF("cAccumAlphaBits = %hhu\n", pfd->cAccumAlphaBits);
-    ErrorF("cDepthBits = %hhu\n", pfd->cDepthBits);
-    ErrorF("cStencilBits = %hhu\n", pfd->cStencilBits);
-    ErrorF("cAuxBuffers = %hhu\n", pfd->cAuxBuffers);
-    ErrorF("iLayerType = %hhu\n", pfd->iLayerType);
-    ErrorF("bReserved = %hhu\n", pfd->bReserved);
-    ErrorF("dwLayerMask = %lu\n", pfd->dwLayerMask);
-    ErrorF("dwVisibleMask = %lu\n", pfd->dwVisibleMask);
-    ErrorF("dwDamageMask = %lu\n", pfd->dwDamageMask);
-    ErrorF("\n");
-}
-
-static const char *
-visual_class_name(int cls)
-{
-  switch (cls) {
-  case GLX_STATIC_COLOR:
-    return "StaticColor";
-  case GLX_PSEUDO_COLOR:
-    return "PseudoColor";
-  case GLX_STATIC_GRAY:
-    return "StaticGray";
-  case GLX_GRAY_SCALE:
-    return "GrayScale";
-  case GLX_TRUE_COLOR:
-     return "TrueColor";
-  case GLX_DIRECT_COLOR:
-     return "DirectColor";
-  default:
-    return "-none-";
-  }
-}
-
-static const char *
-swap_method_name(int mthd)
-{
-  switch (mthd)
-    {
-    case GLX_SWAP_EXCHANGE_OML:
-      return "xchg";
-    case GLX_SWAP_COPY_OML:
-      return "copy";
-    case GLX_SWAP_UNDEFINED_OML:
-      return "    ";
-    default:
-      return "????";
-    }
-}
-
-static void
-fbConfigsDump(unsigned int n, __GLXconfig *c)
-{
-  ErrorF("%d fbConfigs\n", n);
-  ErrorF("pxf vis  fb                      render         Ste                     aux    accum        MS    drawable             Group/\n");
-  ErrorF("idx  ID  ID VisualType Depth Lvl RGB CI DB Swap reo  R  G  B  A   Z  S  buf AR AG AB AA  bufs num  W P Pb  Float Trans Caveat\n");
-  ErrorF("-----------------------------------------------------------------------------------------------------------------------------\n");
-
-  while (c != NULL)
-    {
-      unsigned int i = ((GLXWinConfig *)c)->pixelFormatIndex;
-
-      ErrorF("%3d  %2x  %2x "
-             "%-11s"
-             " %3d %3d   %s   %s  %s %s  %s  "
-             "%2d %2d %2d %2d  "
-             "%2d %2d  "
-             "%2d  "
-             "%2d %2d %2d %2d"
-             "   %2d   %2d"
-             "  %s %s %s "
-             "    %s   "
-             "  %s   "
-             "  %d %s"
-             "\n",
-             i, c->visualID, c->fbconfigID,
-             visual_class_name(c->visualType),
-             c->rgbBits ? c->rgbBits : c->indexBits,
-             c->level,
-	     (c->renderType & GLX_RGBA_BIT) ? "y" : ".",
-	     (c->renderType & GLX_COLOR_INDEX_BIT) ? "y" : ".",
-	     c->doubleBufferMode ? "y" : ".",
-             swap_method_name(c->swapMethod),
-	     c->stereoMode ? "y" : ".",
-             c->redBits, c->greenBits, c->blueBits, c->alphaBits,
-             c->depthBits, c->stencilBits,
-             c->numAuxBuffers,
-             c->accumRedBits, c->accumGreenBits, c->accumBlueBits, c->accumAlphaBits,
-             c->sampleBuffers, c->samples,
-             (c->drawableType & GLX_WINDOW_BIT) ? "y" : ".",
-             (c->drawableType & GLX_PIXMAP_BIT) ? "y" : ".",
-             (c->drawableType & GLX_PBUFFER_BIT) ? "y" : ".",
-             ".",
-             (c->transparentPixel != GLX_NONE_EXT) ? "y" : ".",
-             c->visualSelectGroup, (c->visualRating == GLX_SLOW_VISUAL_EXT) ? "*" : " ");
-
-      c = c->next;
-    }
-}
-#endif
-
-/* ---------------------------------------------------------------------- */
-/*
- * Forward declarations
- */
-
-static __GLXscreen *glxWinScreenProbe(ScreenPtr pScreen);
-static __GLXcontext *glxWinCreateContext(__GLXscreen *screen,
-                                        __GLXconfig *modes,
-                                        __GLXcontext *baseShareContext);
-static __GLXdrawable *glxWinCreateDrawable(ClientPtr client,
-                                          __GLXscreen *screen,
-                                          DrawablePtr pDraw,
-                                          XID drawId,
-                                          int type,
-                                          XID glxDrawId,
-                                          __GLXconfig *conf);
-
-static Bool glxWinRealizeWindow(WindowPtr pWin);
-static Bool glxWinUnrealizeWindow(WindowPtr pWin);
-static Bool glxWinDestroyWindow(WindowPtr pWin);
-static void glxWinCopyWindow(WindowPtr pWindow, DDXPointRec ptOldOrg, RegionPtr prgnSrc);
-static Bool glxWinPositionWindow(WindowPtr pWindow, int x, int y);
-
-static HDC glxWinMakeDC(__GLXWinContext *gc, __GLXWinDrawable *draw, HWND *hwnd);
-static void glxWinReleaseDC(HWND hwnd, HDC hdc, __GLXWinDrawable *draw);
-
-static void glxWinCreateConfigs(HDC dc, glxWinScreen *screen);
-static void glxWinCreateConfigsExt(HDC hdc, glxWinScreen *screen);
-static int fbConfigToPixelFormat(__GLXconfig *mode, PIXELFORMATDESCRIPTOR *pfdret, int drawableTypeOverride);
-static int fbConfigToPixelFormatIndex(HDC hdc, __GLXconfig *mode, int drawableTypeOverride, glxWinScreen *winScreen);
-
-/* ---------------------------------------------------------------------- */
-/*
- * The GLX provider
- */
-
-__GLXprovider __glXWGLProvider = {
-    glxWinScreenProbe,
-    "Win32 native WGL",
-    NULL
-};
-
-void
-glxWinPushNativeProvider(void)
-{
-  if (g_fNativeGl)
-    GlxPushProvider(&__glXWGLProvider);
-}
-
-/* ---------------------------------------------------------------------- */
-/*
- * Screen functions
- */
-
-static void
-glxWinScreenDestroy(__GLXscreen *screen)
-{
-    GLWIN_DEBUG_MSG("glxWinScreenDestroy(%p)", screen);
-    __glXScreenDestroy(screen);
-    xfree(screen);
-}
-
-static int
-glxWinScreenSwapInterval(__GLXdrawable *drawable, int interval)
-{
-  BOOL ret = wglSwapIntervalEXTWrapper(interval);
-  if (!ret)
-    {
-      ErrorF("wglSwapIntervalEXT interval %d failed:%s\n", interval, glxWinErrorMessage());
-    }
-  return ret;
-}
-
-static LRESULT CALLBACK GlxWindowProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
-{
-  if (uMsg== WM_NCHITTEST)
-  {
-    return HTTRANSPARENT;
-  }
-  else
-    return DefWindowProc(hwnd, uMsg, wParam, lParam);
-}
-
-/*
-  Report the extensions split and formatted to avoid overflowing a line
- */
-static void
-glxLogExtensions(const char *prefix, const char *extensions)
-{
-  int length = 0;
-  char *strl;
-  char *str = xalloc(strlen(extensions) + 1);
-
-  if (str == NULL)
-    {
-      ErrorF("glxLogExtensions: xalloc error\n");
-      return;
-    }
-
-  str[strlen(extensions)] = '\0';
-  strncpy (str, extensions, strlen(extensions));
-
-  strl = strtok(str, " ");
-  winDebug("%s%s", prefix, strl);
-  length = strlen(prefix) + strlen(strl);
-
-  while (1)
-    {
-      strl = strtok(NULL, " ");
-      if (strl == NULL) break;
-
-      if (length + strlen(strl) + 1 > 120)
-        {
-          winDebug("\n");
-          winDebug("%s",prefix);
-          length = strlen(prefix);
-        }
-      else
-        {
-          winDebug(" ");
-          length++;
-        }
-
-      winDebug("%s", strl);
-      length = length + strlen(strl);
-    }
-
-  winDebug("\n");
-
-  xfree(str);
-}
-
-/* This is called by GlxExtensionInit() asking the GLX provider if it can handle the screen... */
-static __GLXscreen *
-glxWinScreenProbe(ScreenPtr pScreen)
-{
-    glxWinScreen *screen;
-    const char *gl_extensions;
-    const char *wgl_extensions;
-    HWND hwnd;
-    HDC hdc;
-    HGLRC hglrc;
-
-    GLWIN_DEBUG_MSG("glxWinScreenProbe");
-
-#ifdef _DEBUG
-    glxWinInitDebugSettings();
-#endif
-
-    if (pScreen == NULL)
-	return NULL;
-
-    if (!winCheckScreenAiglxIsSupported(pScreen))
-      {
-        LogMessage(X_ERROR,"AIGLX: No native OpenGL in modes with a root window\n");
-        return NULL;
-      }
-
-    screen = xcalloc(1, sizeof(glxWinScreen));
-
-    if (NULL == screen)
-	return NULL;
-
-    /* Wrap RealizeWindow, UnrealizeWindow and CopyWindow on this screen */
-    screen->RealizeWindow = pScreen->RealizeWindow;
-    pScreen->RealizeWindow = glxWinRealizeWindow;
-    screen->UnrealizeWindow = pScreen->UnrealizeWindow;
-    pScreen->UnrealizeWindow = glxWinUnrealizeWindow;
-    screen->CopyWindow = pScreen->CopyWindow;
-    pScreen->CopyWindow = glxWinCopyWindow;
-    screen->PositionWindow = pScreen->PositionWindow;
-    pScreen->PositionWindow = glxWinPositionWindow;
-    screen->DestroyWindow = pScreen->DestroyWindow;
-    pScreen->DestroyWindow = glxWinDestroyWindow;
-
-    /* Dump out some useful information about the native renderer */
-
-    // create window class
-    {
-      static wATOM glTestWndClass = 0;
-      if (glTestWndClass == 0)
-        {
-          WNDCLASSEX wc;
-          glTestWndClass=1;
-          wc.cbSize = sizeof(WNDCLASSEX);
-          wc.style = CS_OWNDC ;
-          wc.lpfnWndProc = GlxWindowProc;
-          wc.cbClsExtra = 0;
-          wc.cbWndExtra = 0;
-          wc.hInstance = GetModuleHandle(NULL);
-          wc.hIcon = 0;
-          wc.hCursor = 0;
-          wc.hbrBackground = 0;
-          wc.lpszMenuName = NULL;
-          wc.lpszClassName = WIN_GL_WINDOW_CLASS;
-          wc.hIconSm = 0;
-          RegisterClassEx (&wc);
-      }
-    }
-
-    // create an invisible window for a scratch DC
-    hwnd = CreateWindowExA(0,
-                           WIN_GL_WINDOW_CLASS,
-                           "XWin GL Renderer Capabilities Test Window",
-                           0, 0, 0, 0, 0, NULL, NULL, GetModuleHandle(NULL), NULL);
-    if (hwnd == NULL)
-      LogMessage(X_ERROR,"AIGLX: Couldn't create a window for render capabilities testing\n");
-
-    hdc = GetDC(hwnd);
-
-    // we must set a pixel format before we can create a context, just use the first one...
-    SetPixelFormat(hdc, 1, NULL);
-    hglrc = wglCreateContext(hdc);
-    wglMakeCurrent(hdc, hglrc);
-
-    // initialize wgl extension proc pointers (don't call them before here...)
-    // (but we need to have a current context for them to be resolvable)
-    wglResolveExtensionProcs();
-
-    winDebug("GL_VERSION:     %s\n", glGetStringWrapperNonstatic(GL_VERSION));
-    winDebug("GL_VENDOR:      %s\n", glGetStringWrapperNonstatic(GL_VENDOR));
-    winDebug("GL_RENDERER:    %s\n", glGetStringWrapperNonstatic(GL_RENDERER));
-    gl_extensions = (const char *)glGetStringWrapperNonstatic(GL_EXTENSIONS);
-    glxLogExtensions("GL_EXTENSIONS:  ", gl_extensions);
-    wgl_extensions = wglGetExtensionsStringARBWrapper(hdc);
-    if (!wgl_extensions) wgl_extensions = "";
-    glxLogExtensions("WGL_EXTENSIONS: ", wgl_extensions);
-
-    // Can you see the problem here?  The extensions string is DC specific
-    // Different DCs for windows on a multimonitor system driven by multiple cards
-    // might have completely different capabilities.  Of course, good luck getting
-    // those screens to be accelerated in XP and earlier...
-
-    {
-      // testing facility to not use any WGL extensions
-      char *envptr = getenv("GLWIN_NO_WGL_EXTENSIONS");
-      if ((envptr != NULL) && (atoi(envptr) != 0))
-        {
-          ErrorF("GLWIN_NO_WGL_EXTENSIONS is set, ignoring WGL_EXTENSIONS\n");
-          wgl_extensions = "";
-        }
-    }
-
-    {
-      Bool glx_sgi_make_current_read = FALSE;
-
-      //
-      // Based on the WGL extensions available, enable various GLX extensions
-      // XXX: make this table-driven ?
-      //
-      memset(screen->glx_enable_bits, 0, __GLX_EXT_BYTES);
-
-      __glXEnableExtension(screen->glx_enable_bits, "GLX_EXT_visual_info");
-      __glXEnableExtension(screen->glx_enable_bits, "GLX_EXT_visual_rating");
-      __glXEnableExtension(screen->glx_enable_bits, "GLX_EXT_import_context");
-      __glXEnableExtension(screen->glx_enable_bits, "GLX_OML_swap_method");
-      __glXEnableExtension(screen->glx_enable_bits, "GLX_SGIX_fbconfig");
-
-      if (strstr(wgl_extensions, "WGL_ARB_make_current_read"))
-        {
-          __glXEnableExtension(screen->glx_enable_bits, "GLX_SGI_make_current_read");
-          LogMessage(X_INFO, "AIGLX: enabled GLX_SGI_make_current_read\n");
-          glx_sgi_make_current_read = TRUE;
-        }
-
-      if (strstr(gl_extensions, "GL_WIN_swap_hint"))
-        {
-          __glXEnableExtension(screen->glx_enable_bits, "GLX_MESA_copy_sub_buffer");
-          LogMessage(X_INFO, "AIGLX: enabled GLX_MESA_copy_sub_buffer\n");
-        }
-
-      if (strstr(wgl_extensions, "WGL_EXT_swap_control"))
-        {
-          __glXEnableExtension(screen->glx_enable_bits, "GLX_SGI_swap_control");
-          __glXEnableExtension(screen->glx_enable_bits, "GLX_MESA_swap_control");
-          LogMessage(X_INFO, "AIGLX: enabled GLX_SGI_swap_control and GLX_MESA_swap_control\n");
-        }
-
-/*       // Hmm?  screen->texOffset */
-/*       if (strstr(wgl_extensions, "WGL_ARB_render_texture")) */
-/*         { */
-/*           __glXEnableExtension(screen->glx_enable_bits, "GLX_EXT_texture_from_pixmap"); */
-/*           LogMessage(X_INFO, "AIGLX: GLX_EXT_texture_from_pixmap backed by buffer objects\n"); */
-/*           screen->has_WGL_ARB_render_texture = TRUE; */
-/*         } */
-
-      if (strstr(wgl_extensions, "WGL_ARB_pbuffer"))
-        {
-          __glXEnableExtension(screen->glx_enable_bits, "GLX_SGIX_pbuffer");
-          LogMessage(X_INFO, "AIGLX: enabled GLX_SGIX_pbuffer\n");
-          screen->has_WGL_ARB_pbuffer = TRUE;
-        }
-
-      if (strstr(wgl_extensions, "WGL_ARB_multisample"))
-        {
-          __glXEnableExtension(screen->glx_enable_bits, "GLX_ARB_multisample");
-          __glXEnableExtension(screen->glx_enable_bits, "GLX_SGIS_multisample");
-          LogMessage(X_INFO, "AIGLX: enabled GLX_ARB_multisample and GLX_SGIS_multisample\n");
-          screen->has_WGL_ARB_multisample = TRUE;
-        }
-
-      screen->base.destroy = glxWinScreenDestroy;
-      screen->base.createContext = glxWinCreateContext;
-      screen->base.createDrawable = glxWinCreateDrawable;
-      screen->base.swapInterval = glxWinScreenSwapInterval;
-      screen->base.hyperpipeFuncs = NULL;
-      screen->base.swapBarrierFuncs = NULL;
-      screen->base.pScreen = pScreen;
-
-      if (strstr(wgl_extensions, "WGL_ARB_pixel_format"))
-        {
-          glxWinCreateConfigsExt(hdc, screen);
-          screen->has_WGL_ARB_pixel_format = TRUE;
-        }
-      else
-        {
-          glxWinCreateConfigs(hdc, screen);
-          screen->has_WGL_ARB_pixel_format = FALSE;
-        }
-      // Initializes screen->base.fbconfigs and screen->base.numFBConfigs
-
-      /* These will be set by __glXScreenInit */
-      screen->base.visuals = NULL;
-      screen->base.numVisuals = 0;
-
-      __glXScreenInit(&screen->base, pScreen);
-
-#ifdef _DEBUG
-      // dump out fbConfigs now fbConfigIds and visualIDs have been assigned
-      fbConfigsDump(screen->base.numFBConfigs, screen->base.fbconfigs);
-#endif
-
-      // Override the GL extensions string set by __glXScreenInit()
-      screen->base.GLextensions = xstrdup(gl_extensions);
-
-      // Generate the GLX extensions string (overrides that set by __glXScreenInit())
-      {
-        unsigned int buffer_size = __glXGetExtensionString(screen->glx_enable_bits, NULL);
-        if (buffer_size > 0)
-          {
-            if (screen->base.GLXextensions != NULL)
-              {
-                xfree(screen->base.GLXextensions);
-              }
-
-            screen->base.GLXextensions = xnfalloc(buffer_size);
-            __glXGetExtensionString(screen->glx_enable_bits, screen->base.GLXextensions);
-          }
-      }
-
-      //
-      // Override the GLX version (__glXScreenInit() sets it to "1.2")
-      // if we have all the needed extensionsto operate as a higher version
-      //
-      // SGIX_fbconfig && SGIX_pbuffer && SGI_make_current_read -> 1.3
-      // ARB_multisample -> 1.4
-      //
-      if (screen->has_WGL_ARB_pbuffer && glx_sgi_make_current_read)
-        {
-          xfree(screen->base.GLXversion);
-
-          if (screen->has_WGL_ARB_multisample)
-            {
-              screen->base.GLXversion = xstrdup("1.4");
-              screen->base.GLXmajor = 1;
-              screen->base.GLXminor = 4;
-            }
-          else
-            {
-              screen->base.GLXversion = xstrdup("1.3");
-              screen->base.GLXmajor = 1;
-              screen->base.GLXminor = 3;
-            }
-          LogMessage(X_INFO, "AIGLX: Set GLX version to %s\n", screen->base.GLXversion);
-        }
-    }
-
-    wglMakeCurrent(NULL, NULL);
-    wglDeleteContext(hglrc);
-    ReleaseDC(hwnd, hdc);
-    DestroyWindow(hwnd);
-
-    return &screen->base;
-}
-
-/* ---------------------------------------------------------------------- */
-/*
- * Window functions
- */
-
-static Bool
-glxWinRealizeWindow(WindowPtr pWin)
-{
-    Bool result;
-    ScreenPtr pScreen = pWin->drawable.pScreen;
-    glxWinScreen *screenPriv = (glxWinScreen *) glxGetScreen(pScreen);
-    winWindowPriv(pWin);
-
-    GLWIN_DEBUG_MSG("glxWinRealizeWindow");
-
-    /* Allow the window to be created (RootlessRealizeWindow is inside our wrap) */
-    pScreen->RealizeWindow = screenPriv->RealizeWindow;
-    result = pScreen->RealizeWindow(pWin);
-    pScreen->RealizeWindow = glxWinRealizeWindow;
-    
-    // Check if ze need to move the window\n
-    if (pWinPriv->GlCtxWnd && pWinPriv->hWnd)
-    {
-       ShowWindow(pWinPriv->hWnd,SW_SHOW);
-    }
-    return result;
-}
-
-
-static void
-glxWinCopyWindow(WindowPtr pWindow, DDXPointRec ptOldOrg, RegionPtr prgnSrc)
-{
-    __GLXWinDrawable *pGlxDraw;
-    ScreenPtr pScreen = pWindow->drawable.pScreen;
-    glxWinScreen *screenPriv = (glxWinScreen *) glxGetScreen(pScreen);
-
-    GLWIN_TRACE_MSG("glxWinCopyWindow pWindow %p", pWindow);
-
-    dixLookupResourceByType((pointer) &pGlxDraw, pWindow->drawable.id, __glXDrawableRes,
-				NullClient, DixUnknownAccess);
-
-
-    /*
-       Discard any CopyWindow requests if a GL drawing context is pointing at the window
-
-       For regions which are being drawn by GL, the shadow framebuffer doesn't have the
-       correct bits, so we wish to avoid shadow framebuffer damage occuring, which will
-       cause those incorrect bits to be transferred to the display....
-    */
-    if (pGlxDraw && pGlxDraw->drawContext)
-      {
-        GLWIN_DEBUG_MSG("glxWinCopyWindow: discarding");
-        return;
-      }
-
-    GLWIN_DEBUG_MSG("glxWinCopyWindow - passing to hw layer");
-
-    pScreen->CopyWindow = screenPriv->CopyWindow;
-    pScreen->CopyWindow(pWindow, ptOldOrg, prgnSrc);
-    pScreen->CopyWindow = glxWinCopyWindow;
-
-}
-
-static Bool
-glxWinPositionWindow(WindowPtr pWin, int x, int y)
-{
-    Bool result;
-    ScreenPtr pScreen = pWin->drawable.pScreen;
-    glxWinScreen *screenPriv = (glxWinScreen *) glxGetScreen(pScreen);
-    winWindowPriv(pWin);
-
-    pScreen->PositionWindow = screenPriv->PositionWindow;
-    result = pScreen->PositionWindow(pWin, x, y);
-    pScreen->PositionWindow = glxWinPositionWindow;
-
-    if (pWinPriv->GlCtxWnd && pWinPriv->hWnd)
-    {
-       MoveWindow(pWinPriv->hWnd,
-                  pWin->drawable.x,
-                  pWin->drawable.y,
-                  pWin->drawable.width,
-                  pWin->drawable.height,
-                  FALSE);
-    }
-    return result;
-}
-
-
-static Bool
-glxWinUnrealizeWindow(WindowPtr pWin)
-{
-    Bool result;
-    ScreenPtr pScreen = pWin->drawable.pScreen;
-    glxWinScreen *screenPriv = (glxWinScreen *)glxGetScreen(pScreen);
-    winWindowPriv(pWin);
-
-    GLWIN_DEBUG_MSG("glxWinUnrealizeWindow");
-
-    pScreen->UnrealizeWindow = screenPriv->UnrealizeWindow;
-    result = pScreen->UnrealizeWindow(pWin);
-    pScreen->UnrealizeWindow = glxWinUnrealizeWindow;
-
-    if (pWinPriv->GlCtxWnd && pWinPriv->hWnd)
-      ShowWindow(pWinPriv->hWnd,SW_HIDE);
-
-    return result;
-}
-
-static Bool
-glxWinDestroyWindow(WindowPtr pWin)
-{
-    Bool result;
-    ScreenPtr pScreen = pWin->drawable.pScreen;
-    glxWinScreen *screenPriv = (glxWinScreen *)glxGetScreen(pScreen);
-    winWindowPriv(pWin);
-
-    GLWIN_DEBUG_MSG("glxWinDestroyWindow");
-
-    if (pWinPriv->GlCtxWnd && pWinPriv->hWnd)
-    {
-      __GLXWinDrawable *pGlxDraw;
-
-      dixLookupResourceByType((pointer) &pGlxDraw, pWin->drawable.id, __glXDrawableRes, NullClient, DixUnknownAccess);
-
-      if (pGlxDraw && pGlxDraw->drawContext)
-      {
-        if (pGlxDraw->drawContext->hwnd!=pWinPriv->hWnd)
-          ErrorF("Wrong assumption\n");
-        glxWinReleaseDC(pGlxDraw->drawContext->hwnd, pGlxDraw->drawContext->hDC, pGlxDraw);
-        pGlxDraw->drawContext->hDC=NULL;
-        pGlxDraw->drawContext->hwnd=NULL;
-      }
-      DestroyWindow(pWinPriv->hWnd);
-      pWinPriv->hWnd=NULL;
-      pWinPriv->GlCtxWnd=0;
-    }
-
-    pScreen->DestroyWindow = screenPriv->DestroyWindow;
-    result = pScreen->DestroyWindow(pWin);
-    pScreen->DestroyWindow = glxWinDestroyWindow;
-
-    return result;
-}
-
-/* ---------------------------------------------------------------------- */
-/*
- * Drawable functions
- */
-
-static GLboolean
-glxWinDrawableSwapBuffers(ClientPtr client, __GLXdrawable *base)
-{
-    BOOL ret;
-    __GLXWinDrawable *draw = (__GLXWinDrawable *)base;
-
-    /* Swap buffers on the last active context for drawing on the drawable */
-    if (draw->drawContext == NULL)
-      {
-        GLWIN_TRACE_MSG("glxWinSwapBuffers - no context for drawable");
-        return GL_FALSE;
-      }
-
-    GLWIN_TRACE_MSG("glxWinSwapBuffers on drawable %p, last context %p (native ctx %p)", base, draw->drawContext, draw->drawContext->ctx);
-
-    /*
-       draw->drawContext->base.drawPriv will not be set if the context is not current anymore,
-       but if it is, it should point to this drawable....
-    */
-    assert((draw->drawContext->base.drawPriv == NULL) || (draw->drawContext->base.drawPriv == base));
-
-    ret = SwapBuffers(draw->drawContext->hDC);
-
-    if (!ret)
-      {
-        ErrorF("wglSwapBuffers failed: %s\n", glxWinErrorMessage());
-        return GL_FALSE;
-      }
-
-    return GL_TRUE;
-}
-
-static void
-glxWinDrawableCopySubBuffer(__GLXdrawable *drawable,
-                            int x, int y, int w, int h)
-{
-  glAddSwapHintRectWINWrapperNonstatic(x, y, w, h);
-  glxWinDrawableSwapBuffers(NULL, drawable);
-}
-
-static void
-glxWinDrawableDestroy(__GLXdrawable *base)
-{
-  __GLXWinDrawable *glxPriv = (__GLXWinDrawable *)base;
-
-  if (glxPriv->drawContext && (__glXLastContext == &((glxPriv->drawContext)->base)))
-    {
-      // if this context is current and has unflushed commands, say we have flushed them
-      // (don't actually flush them, the window is going away anyhow, and an implict flush occurs
-      // on the next context change)
-      // (GLX core considers it an error when we try to select a new current context if the old one
-      // has unflushed commands, but the window has disappeared..)
-      __GLX_NOTE_FLUSHED_CMDS(__glXLastContext);
-      __glXLastContext = NULL;
-    }
-
-  if (glxPriv->hPbuffer)
-    if (!wglDestroyPbufferARBWrapper(glxPriv->hPbuffer))
-      {
-        ErrorF("wglDestroyPbufferARB failed: %s\n", glxWinErrorMessage());
-      }
-
-  if (glxPriv->dibDC)
-    {
-      // restore the default DIB
-      SelectObject(glxPriv->dibDC, glxPriv->hOldDIB);
-
-      if (!DeleteDC(glxPriv->dibDC))
-        {
-          ErrorF("DeleteDC failed: %s\n", glxWinErrorMessage());
-        }
-    }
-
-  if (glxPriv->hDIB)
-    {
-      if (!DeleteObject(glxPriv->hDIB))
-        {
-          ErrorF("DeleteObject failed: %s\n", glxWinErrorMessage());
-        }
-
-      ((PixmapPtr)glxPriv->base.pDraw)->devPrivate.ptr = glxPriv->pOldBits;
-    }
-
-  GLWIN_DEBUG_MSG("glxWinDestroyDrawable");
-  xfree(glxPriv);
-}
-
-static __GLXdrawable *
-glxWinCreateDrawable(ClientPtr client,
-			     __GLXscreen *screen,
-			     DrawablePtr pDraw,
-			     XID drawId,
-			     int type,
-			     XID glxDrawId,
-			     __GLXconfig *conf)
-{
-  __GLXWinDrawable *glxPriv;
-
-  glxPriv = xcalloc(1,sizeof(*glxPriv));
-
-  if (glxPriv == NULL)
-      return NULL;
-
-  if(!__glXDrawableInit(&glxPriv->base, screen, pDraw, type, glxDrawId, conf)) {
-    xfree(glxPriv);
-    return NULL;
-  }
-
-  glxPriv->base.destroy       = glxWinDrawableDestroy;
-  glxPriv->base.swapBuffers   = glxWinDrawableSwapBuffers;
-  glxPriv->base.copySubBuffer = glxWinDrawableCopySubBuffer;
-  // glxPriv->base.waitX  what are these for?
-  // glxPriv->base.waitGL
-
-  GLWIN_DEBUG_MSG("glxWinCreateDrawable %p", glxPriv);
-
-  return &glxPriv->base;
-}
-
-/* ---------------------------------------------------------------------- */
-/*
- * Texture functions
- */
-
-static
-int glxWinBindTexImage(__GLXcontext  *baseContext,
-                      int            buffer,
-                      __GLXdrawable *pixmap)
-{
-  ErrorF("glxWinBindTexImage: not implemented\n");
-  return FALSE;
-}
-
-static
-int glxWinReleaseTexImage(__GLXcontext  *baseContext,
-                         int            buffer,
-                         __GLXdrawable *pixmap)
-{
-  ErrorF(" glxWinReleaseTexImage: not implemented\n");
-  return FALSE;
-}
-
-/* ---------------------------------------------------------------------- */
-/*
- * Lazy update context implementation
- *
- * WGL contexts are created for a specific HDC, so we cannot create the WGL
- * context in glxWinCreateContext(), we must defer creation until the context
- * is actually used on a specifc drawable which is connected to a native window,
- * pbuffer or DIB
- *
- * The WGL context may be used on other, compatible HDCs, so we don't need to
- * recreate it for every new native window
- *
- * XXX: I wonder why we can't create the WGL context on the screen HDC ?
- * Basically we assume all HDCs are compatible at the moment: if they are not
- * we are in a muddle, there was some code in the old implementation to attempt
- * to transparently migrate a context to a new DC by copying state and sharing
- * lists with the old one...
- */
-
-static void
-glxWinSetPixelFormat(__GLXWinContext *gc, HDC hdc, int bppOverride, int drawableTypeOverride)
-{
-  __GLXscreen *screen = gc->base.pGlxScreen;
-  glxWinScreen *winScreen = (glxWinScreen *)screen;
-
-  __GLXconfig *config = gc->base.config;
-  GLXWinConfig *winConfig = (GLXWinConfig *)config;
-  
-  GLWIN_DEBUG_MSG("glxWinSetPixelFormat: pixelFormatIndex %d", winConfig->pixelFormatIndex);
-
-  /*
-    Normally, we can just use the the pixelFormatIndex corresponding
-    to the fbconfig which has been specified by the client
-  */
-
-  if (!((bppOverride && (bppOverride != (config->redBits + config->greenBits + config->blueBits) ))
-        || ((config->drawableType & drawableTypeOverride) == 0)))
-    {
-      if (!SetPixelFormat(hdc, winConfig->pixelFormatIndex, NULL))
-        {
-          ErrorF("SetPixelFormat error: %s\n", glxWinErrorMessage());
-          return;
-        }
-
-      return;
-    }
-
-  /*
-    However, in certain special cases this pixel format will be incompatible with the
-    use we are going to put it to, so we need to re-evaluate the pixel format to use:
-
-    1) When PFD_DRAW_TO_BITMAP is set, ChoosePixelFormat() always returns a format with
-       the cColorBits we asked for, so we need to ensure it matches the bpp of the bitmap
-
-    2) Applications may assume that visuals selected with glXChooseVisual() work with
-       pixmap drawables (there is no attribute to explicitly query for pixmap drawable
-       support as there is for glXChooseFBConfig())
-       (it's arguable this is an error in the application, but we try to make it work)
-
-       pixmap rendering is always slow for us, so we don't want to choose those visuals
-       by default, but if the actual drawable type we're trying to select the context
-       on (drawableTypeOverride) isn't supported by the selected fbConfig, reconsider
-       and see if we can find a suitable one...
-   */
-  ErrorF("glxWinSetPixelFormat: having second thoughts: cColorbits %d, bppOveride %d; config->drawableType %d, drawableTypeOverride %d\n",
-         (config->redBits + config->greenBits + config->blueBits), bppOverride, config->drawableType, drawableTypeOverride);
-
-  if (!winScreen->has_WGL_ARB_pixel_format)
-    {
-      PIXELFORMATDESCRIPTOR pfd;
-      int pixelFormat;
-      
-      /* convert fbConfig to PFD */
-      if (fbConfigToPixelFormat(gc->base.config, &pfd, drawableTypeOverride))
-        {
-          ErrorF("glxWinSetPixelFormat: fbConfigToPixelFormat failed\n");
-          return;
-        }
-
-#ifdef _DEBUG
-        if (glxWinDebugSettings.dumpPFD)
-        pfdOut(&pfd);
-#endif
-
-      if (bppOverride)
-        {
-          GLWIN_DEBUG_MSG("glxWinSetPixelFormat: Forcing bpp from %d to %d\n", pfd.cColorBits, bppOverride);
-          pfd.cColorBits = bppOverride;
-        }
-
-      pixelFormat = ChoosePixelFormat(hdc, &pfd);
-      if (pixelFormat == 0)
-        {
-          ErrorF("ChoosePixelFormat error: %s\n", glxWinErrorMessage());
-          return;
-        }
-
-      GLWIN_DEBUG_MSG("ChoosePixelFormat: chose pixelFormatIndex %d", pixelFormat);
-      ErrorF("ChoosePixelFormat: chose pixelFormatIndex %d (rather than %d as originally planned)\n", pixelFormat, winConfig->pixelFormatIndex);
-
-      if (!SetPixelFormat(hdc, pixelFormat, &pfd))
-        {
-          ErrorF("SetPixelFormat error: %s\n", glxWinErrorMessage());
-          return;
-        }
-    }
-  else
-    {
-      int pixelFormat = fbConfigToPixelFormatIndex(hdc, gc->base.config, drawableTypeOverride, winScreen);
-      if (pixelFormat == 0)
-        {
-          ErrorF("wglChoosePixelFormat error: %s\n", glxWinErrorMessage());
-          return;
-        }
-
-      GLWIN_DEBUG_MSG("wglChoosePixelFormat: chose pixelFormatIndex %d", pixelFormat);
-      ErrorF("wglChoosePixelFormat: chose pixelFormatIndex %d (rather than %d as originally planned)\n", pixelFormat, winConfig->pixelFormatIndex);
-
-      if (!SetPixelFormat(hdc, pixelFormat, NULL))
-        {
-          ErrorF("SetPixelFormat error: %s\n", glxWinErrorMessage());
-          return;
-        }
-    }
-}
-
-static HDC
-glxWinMakeDC(__GLXWinContext *gc, __GLXWinDrawable *draw, HWND *hwnd)
-{
-  HDC hdc = NULL;
-  *hwnd = NULL;
-
-  if (draw == NULL)
-    {
-      GLWIN_TRACE_MSG("No drawable for context %p (native ctx %p)", gc, gc->ctx);
-      return NULL;
-    }
-
-  switch (draw->base.type)
-  {
-    case GLX_DRAWABLE_WINDOW:
-    {
-      WindowPtr pWin;
-
-      pWin = (WindowPtr) draw->base.pDraw;
-      if (pWin == NULL)
-        {
-          GLWIN_TRACE_MSG("for drawable %p, no WindowPtr", pWin);
-          return NULL;
-        }
-
-      *hwnd = winGetWindowInfo(pWin);
-
-      if (*hwnd == NULL)
-        {
-          ErrorF("No HWND error: %s\n", glxWinErrorMessage());
-          return NULL;
-        }
-
-      hdc = GetDC(*hwnd);
-
-      if (hdc == NULL)
-        ErrorF("GetDC error: %s: hwnd %x, gc %p, gc->ctx %p ,gc->hwnd %p\n", glxWinErrorMessage(), *hwnd, gc, gc->ctx, gc->hwnd);
-
-      if (gc->hDC)
-      {
-        glxWinReleaseDC(gc->hwnd, gc->hDC, draw);
-        gc->hDC=NULL;
-      }
-#ifdef _DEBUG
-      if (glxWinDebugSettings.enableTrace)
-            GLWIN_DEBUG_HWND(*hwnd);
-
-          GLWIN_TRACE_MSG("for context %p (native ctx %p), hWnd changed from %p to %p", gc, gc->ctx, gc->hwnd, *hwnd);
-#endif
-      gc->hwnd = *hwnd;
-      
-      /* Check if we need to set the pixelformat */
-      {
-        winWindowPriv(pWin);
-        if (!pWinPriv->PixelFormatSet)
-        {
-          pWinPriv->PixelFormatSet=TRUE;
-          /* We must select a pixelformat, but SetPixelFormat can only be called once for a window... */
-          glxWinSetPixelFormat(gc, hdc, 0, GLX_WINDOW_BIT);
-        }
-      }
-    }
-    break;
-
-  case GLX_DRAWABLE_PBUFFER:
-    {
-      hdc = wglGetPbufferDCARBWrapper(draw->hPbuffer);
-
-      if (hdc == NULL)
-        ErrorF("GetDC (pbuffer) error: %s\n", glxWinErrorMessage());
-    }
-    break;
-
-  case GLX_DRAWABLE_PIXMAP:
-    {
-      hdc = draw->dibDC;
-#ifdef _DEBUG
-      if (glxWinDebugSettings.dumpDC)
-        GLWIN_DEBUG_MSG("Got PIXMAP HDC %p for window %p", hdc, *hwnd);
-#endif
-    }
-    break;
-
-  default:
-    {
-      ErrorF("glxWinMakeDC: tried to makeDC for unhandled drawable type %d\n", draw->base.type);
-    }
-  }
-
-#ifdef _DEBUG
-  if (glxWinDebugSettings.dumpDC)
-    GLWIN_HDC_DEBUG_MSG("Got HDC %p for window %p", hdc, *hwnd);
-#endif
-
-  return hdc;
-}
-
-static void
-glxWinReleaseDC(HWND hwnd, HDC hdc,__GLXWinDrawable *draw)
-{
-  switch (draw->base.type)
-  {
-    case GLX_DRAWABLE_WINDOW:
-    {
-      ReleaseDC(hwnd, hdc);
-    }
-    break;
-
-  case GLX_DRAWABLE_PBUFFER:
-    {
-      if (!wglReleasePbufferDCARBWrapper(draw->hPbuffer, hdc))
-        {
-          ErrorF("wglReleasePbufferDCARB error: %s\n", glxWinErrorMessage());
-        }
-    }
-    break;
-
-  case GLX_DRAWABLE_PIXMAP:
-    {
-      // don't release DC, the memory DC lives as long as the bitmap
-
-      // We must ensure that all GDI drawing into the bitmap has completed
-      // in case we subsequently access the bits from it
-      GdiFlush();
-    }
-    break;
-
-  default:
-    {
-      ErrorF("glxWinReleaseDC: tried to releaseDC for unhandled drawable type %d\n", draw->base.type);
-    }
-  }
-}
-
-static void
-glxWinDeferredCreateContext(__GLXWinContext *gc, __GLXWinDrawable *draw)
-{
-  HWND hwnd;
-  GLWIN_DEBUG_MSG("glxWinDeferredCreateContext: attach context %p to drawable %p", gc, draw);
-
-  switch (draw->base.type)
-  {
-    case GLX_DRAWABLE_WINDOW:
-    {
-      WindowPtr pWin = (WindowPtr) draw->base.pDraw;
-
-      if (!(gc->base.config->drawableType & GLX_WINDOW_BIT))
-        {
-          ErrorF("glxWinDeferredCreateContext: tried to attach a context whose fbConfig doesn't have drawableType GLX_WINDOW_BIT to a GLX_DRAWABLE_WINDOW drawable\n");
-        }
-
-      if (pWin == NULL)
-        {
-          GLWIN_DEBUG_MSG("Deferring until X window is created");
-          return;
-        }
-
-      GLWIN_DEBUG_MSG("glxWinDeferredCreateContext: pWin %p", pWin);
-
-      if (winGetWindowInfo(pWin) == NULL)
-        {
-          GLWIN_DEBUG_MSG("Deferring until native window is created");
-          return;
-        }
-    }
-    break;
-
-    case GLX_DRAWABLE_PBUFFER:
-    {
-      if (draw->hPbuffer == NULL)
-        {
-          __GLXscreen *screen;
-          glxWinScreen *winScreen;
-          int pixelFormat;
-          // XXX: which DC are supposed to use???
-          HDC screenDC = GetDC(NULL);
-
-          if (!(gc->base.config->drawableType & GLX_PBUFFER_BIT))
-            {
-              ErrorF("glxWinDeferredCreateContext: tried to attach a context whose fbConfig doesn't have drawableType GLX_PBUFFER_BIT to a GLX_DRAWABLE_PBUFFER drawable\n");
-            }
-
-          screen = gc->base.pGlxScreen;
-          winScreen = (glxWinScreen *)screen;
-
-          pixelFormat = fbConfigToPixelFormatIndex(screenDC, gc->base.config, GLX_DRAWABLE_PBUFFER, winScreen);
-          if (pixelFormat == 0)
-            {
-              ErrorF("wglChoosePixelFormat error: %s\n", glxWinErrorMessage());
-              return;
-            }
-
-          draw->hPbuffer = wglCreatePbufferARBWrapper(screenDC, pixelFormat, draw->base.pDraw->width, draw->base.pDraw->height, NULL);
-          ReleaseDC(NULL, screenDC);
-
-          if (draw->hPbuffer == NULL)
-            {
-              ErrorF("wglCreatePbufferARBWrapper error: %s\n", glxWinErrorMessage());
-              return;
-            }
-
-          GLWIN_DEBUG_MSG("glxWinDeferredCreateContext: pBuffer %p created for drawable %p", draw->hPbuffer, draw);
-        }
-    }
-    break;
-
-    case GLX_DRAWABLE_PIXMAP:
-    {
-      if (draw->dibDC == NULL)
-        {
-          BITMAPINFOHEADER bmpHeader;
-          void *pBits;
-
-          memset (&bmpHeader, 0, sizeof(BITMAPINFOHEADER));
-          bmpHeader.biSize = sizeof(BITMAPINFOHEADER);
-          bmpHeader.biWidth = draw->base.pDraw->width;
-          bmpHeader.biHeight = draw->base.pDraw->height;
-          bmpHeader.biPlanes = 1;
-          bmpHeader.biBitCount = draw->base.pDraw->bitsPerPixel;
-          bmpHeader.biCompression = BI_RGB;
-
-          if (!(gc->base.config->drawableType & GLX_PIXMAP_BIT))
-            {
-              ErrorF("glxWinDeferredCreateContext: tried to attach a context whose fbConfig doesn't have drawableType GLX_PIXMAP_BIT to a GLX_DRAWABLE_PIXMAP drawable\n");
-            }
-
-          draw->dibDC = CreateCompatibleDC(NULL);
-          if (draw->dibDC == NULL)
-            {
-              ErrorF("CreateCompatibleDC error: %s\n", glxWinErrorMessage());
-              return;
-            }
-
-          draw->hDIB = CreateDIBSection(draw->dibDC, (BITMAPINFO *)&bmpHeader, DIB_RGB_COLORS, &pBits, 0, 0);
-          if (draw->dibDC == NULL)
-            {
-              ErrorF("CreateDIBSection error: %s\n", glxWinErrorMessage());
-              return;
-            }
-
-          // XXX: CreateDIBSection insists on allocating the bitmap memory for us, so we're going to
-          // need some jiggery pokery to point the underlying X Drawable's bitmap at the same set of bits
-          // so that they can be read with XGetImage as well as glReadPixels, assuming the formats are
-          // even compatible ...
-          draw->pOldBits = ((PixmapPtr)draw->base.pDraw)->devPrivate.ptr;
-          ((PixmapPtr)draw->base.pDraw)->devPrivate.ptr = pBits;
-
-          // Select the DIB into the DC
-          draw->hOldDIB = SelectObject(draw->dibDC, draw->hDIB);
-          if (!draw->hOldDIB)
-            {
-              ErrorF("SelectObject error: %s\n", glxWinErrorMessage());
-            }
-
-          // Set the pixel format of the bitmap
-          glxWinSetPixelFormat(gc, draw->dibDC, draw->base.pDraw->bitsPerPixel, GLX_PIXMAP_BIT);
-
-          GLWIN_DEBUG_MSG("glxWinDeferredCreateContext: DIB bitmap %p created for drawable %p", draw->hDIB, draw);
-        }
-    }
-    break;
-
-    default:
-    {
-      ErrorF("glxWinDeferredCreateContext: tried to attach unhandled drawable type %d\n", draw->base.type);
-      return;
-    }
-  }
-
-  gc->hDC = glxWinMakeDC(gc, draw, &hwnd);
-  gc->ctx = wglCreateContext(gc->hDC);
-
-  if (gc->ctx == NULL)
-    {
-      glxWinReleaseDC(hwnd, gc->hDC, draw);
-      gc->hDC=0;
-      
-      ErrorF("wglCreateContext error: %s\n", glxWinErrorMessage());
-      return;
-    }
-
-  GLWIN_DEBUG_MSG("glxWinDeferredCreateContext: attached context %p to native context %p drawable %p", gc, gc->ctx, draw);
-
-  // if the native context was created successfully, shareLists if needed
-  if (gc->ctx && gc->shareContext)
-    {
-      GLWIN_DEBUG_MSG("glxWinCreateContextReal shareLists with context %p (native ctx %p)", gc->shareContext, gc->shareContext->ctx);
-
-      if (!wglShareLists(gc->shareContext->ctx, gc->ctx))
-        {
-          ErrorF("wglShareLists error: %s\n", glxWinErrorMessage());
-        }
-    }
-}
-
-/* ---------------------------------------------------------------------- */
-/*
- * Context functions
- */
-
-
-/* Context manipulation routines should return TRUE on success, FALSE on failure */
-static int
-glxWinContextMakeCurrent(__GLXcontext *base)
-{
-  __GLXWinContext *gc = (__GLXWinContext *)base;
-  BOOL ret;
-  __GLXWinDrawable *drawPriv;
-
-#ifdef _DEBUG
-  GLWIN_TRACE_MSG("glxWinContextMakeCurrent context %p (native ctx %p)", gc, gc->ctx);
-  glWinCallDelta();
-#endif
-
-  /* Keep a note of the last active context in the drawable */
-  drawPriv = (__GLXWinDrawable *)gc->base.drawPriv;
-  drawPriv->drawContext = gc;
-
-  if (gc->ctx == NULL)
-    {
-      glxWinDeferredCreateContext(gc, drawPriv);
-    }
-
-  if (gc->ctx == NULL)
-    {
-      ErrorF("glxWinContextMakeCurrent: Native context is NULL\n");
-      return FALSE;
-    }
-
-  if ((gc->base.readPriv != NULL) && (gc->base.readPriv != gc->base.drawPriv))
-    {
-      // XXX: should only occur with WGL_ARB_make_current_read
-      /*
-        If there is a separate read drawable, create a separate read DC, and
-        use the wglMakeContextCurrent extension to make the context current drawing
-        to one DC and reading from the other
-      */
-      gc->hreadDC = glxWinMakeDC(gc, (__GLXWinDrawable *)gc->base.readPriv, &gc->hreadwnd);
-      if (gc->hreadDC == NULL)
-        {
-          ErrorF("glxWinMakeDC failed for readDC\n");
-          return FALSE;
-        }
-
-      ret = wglMakeContextCurrentARBWrapper(gc->hDC, gc->hreadDC, gc->ctx);
-      if (!ret)
-        {
-          ErrorF("wglMakeContextCurrentARBWrapper error: %s\n", glxWinErrorMessage());
-        }
-    }
-  else
-    {
-      /* Otherwise, just use wglMakeCurrent */
-      if (!gc->hDC)
-      {
-        /* It probably has been release by loseCurrent, so create it again */
-        gc->hDC = glxWinMakeDC(gc, drawPriv, &gc->hwnd);
-      }
-      ret = wglMakeCurrent(gc->hDC, gc->ctx);
-      if (!ret)
-        {
-          DWORD ErrorCode=GetLastError();
-          ErrorF("wglMakeCurrent error: %x dc %p ctx %p\n", ErrorCode,gc->hDC,gc->ctx);
-          if (!ErrorCode)
-          {
-            ErrorF("Error code was 0, assuming no error.\n");
-            ret=TRUE;
-          }
-        }
-    }
-
-  // apparently make current could fail if the context is current in a different thread,
-  // but that shouldn't be able to happen in the current server...
-
-  return ret;
-}
-
-static int
-glxWinContextLoseCurrent(__GLXcontext *base)
-{
-  BOOL ret=TRUE;
-  __GLXWinContext *gc = (__GLXWinContext *)base;
-
-#ifdef _DEBUG
-  GLWIN_TRACE_MSG("glxWinContextLoseCurrent context %p (native ctx %p)", gc, gc->ctx);
-  glWinCallDelta();
-#endif
-
-
-  if (wglGetCurrentContext()==gc->ctx)
-  {
-    /* Only do this when we are sure we are currently the active, otherwise we are deactivating the wrong one (this is happening!!!) */
-    ret = wglMakeCurrent(NULL, NULL);
-    if (!ret)
-      ErrorF("glxWinContextLoseCurrent error: %s\n", glxWinErrorMessage());
-  }
-  else
-  {
-    return FALSE;
-  }
-
-  /* Since drawPriv is going to be set to zero in the context, we have to release the DC to */
-  if (gc->hDC && gc->base.drawPriv) glxWinReleaseDC(gc->hwnd, gc->hDC, (__GLXWinDrawable *)gc->base.drawPriv);
-  if (gc->hreadDC && gc->base.readPriv) glxWinReleaseDC(gc->hreadwnd, gc->hreadDC, (__GLXWinDrawable *)gc->base.readPriv);
-  gc->hDC=NULL;
-  gc->hreadDC=NULL;
-  
-  base->isCurrent=FALSE;  /* It looks like glx is not doing this */
-
-  return ret;
-}
-
-static int
-glxWinContextCopy(__GLXcontext *dst_base, __GLXcontext *src_base, unsigned long mask)
-{
-  __GLXWinContext *dst = (__GLXWinContext *)dst_base;
-  __GLXWinContext *src = (__GLXWinContext *)src_base;
-  BOOL ret;
-
-  GLWIN_DEBUG_MSG("glxWinContextCopy");
-
-  ret = wglCopyContext(src->ctx, dst->ctx, mask);
-  if (!ret)
-    {
-      ErrorF("wglCopyContext error: %s\n", glxWinErrorMessage());
-    }
-
-  return ret;
-}
-
-static int
-glxWinContextForceCurrent(__GLXcontext *base)
-{
-  /* wglMakeCurrent always flushes the previous context, so this is equivalent to glxWinContextMakeCurrent */
-  return glxWinContextMakeCurrent(base);
-}
-
-static void
-glxWinContextDestroy(__GLXcontext *base)
-{
-  __GLXWinContext *gc = (__GLXWinContext *)base;
-
-  if (gc != NULL)
-    {
-      GLWIN_DEBUG_MSG("GLXcontext %p destroyed (native ctx %p)", base, gc->ctx);
-
-      if (gc->ctx)
-        {
-          BOOL ret;
-          /* It's bad style to delete the context while it's still current */
-          if (wglGetCurrentContext() == gc->ctx)
-            {
-              wglMakeCurrent(NULL, NULL);
-            }
-
-          ret = wglDeleteContext(gc->ctx);
-          if (!ret)
-            ErrorF("wglDeleteContext error: %s\n", glxWinErrorMessage());
-          if (gc->base.drawPriv && gc->hDC) glxWinReleaseDC(gc->hwnd, gc->hDC, (__GLXWinDrawable *)gc->base.drawPriv);
-          if (gc->base.readPriv && gc->hreadDC) glxWinReleaseDC(gc->hreadwnd, gc->hreadDC, (__GLXWinDrawable *)gc->base.readPriv);
-          gc->hDC=NULL;
-          gc->hreadDC=NULL;
-          gc->ctx = NULL;
-        }
-
-      xfree(gc);
-    }
-}
-
-static __GLXcontext *
-glxWinCreateContext(__GLXscreen *screen,
-                   __GLXconfig *modes,
-                   __GLXcontext *baseShareContext)
-{
-    __GLXWinContext *context;
-    __GLXWinContext *shareContext = (__GLXWinContext *)baseShareContext;
-
-    static __GLXtextureFromPixmap glxWinTextureFromPixmap =
-      {
-        glxWinBindTexImage,
-        glxWinReleaseTexImage
-      };
-
-    context = (__GLXWinContext *)xcalloc(1, sizeof(__GLXWinContext));
-
-    if (!context)
-        return NULL;
-
-    memset(context, 0, sizeof *context);
-    context->base.destroy        = glxWinContextDestroy;
-    context->base.makeCurrent    = glxWinContextMakeCurrent;
-    context->base.loseCurrent    = glxWinContextLoseCurrent;
-    context->base.copy           = glxWinContextCopy;
-    context->base.forceCurrent   = glxWinContextForceCurrent;
-    context->base.textureFromPixmap = &glxWinTextureFromPixmap;
-    context->base.config = modes;
-    context->base.pGlxScreen = screen;
-
-    // actual native GL context creation is deferred until attach()
-    //context->ctx = NULL; already done with memset
-    context->shareContext = shareContext;
-
-    glWinSetupDispatchTable();
-
-    GLWIN_DEBUG_MSG("GLXcontext %p created", context);
-
-    return &(context->base);
-}
-
-/* ---------------------------------------------------------------------- */
-/*
- * Utility functions
- */
-
-static int
-fbConfigToPixelFormat(__GLXconfig *mode, PIXELFORMATDESCRIPTOR *pfdret, int drawableTypeOverride)
-{
-    PIXELFORMATDESCRIPTOR pfd = {
-      sizeof(PIXELFORMATDESCRIPTOR),   /* size of this pfd */
-      1,                     /* version number */
-      PFD_SUPPORT_OPENGL,    /* support OpenGL */
-      PFD_TYPE_RGBA,         /* RGBA type */
-      24,                    /* 24-bit color depth */
-      0, 0, 0, 0, 0, 0,      /* color bits ignored */
-      0,                     /* no alpha buffer */
-      0,                     /* shift bit ignored */
-      0,                     /* no accumulation buffer */
-      0, 0, 0, 0,            /* accum bits ignored */
-      32,                    /* 32-bit z-buffer */
-      0,                     /* no stencil buffer */
-      0,                     /* no auxiliary buffer */
-      PFD_MAIN_PLANE,        /* main layer */
-      0,                     /* reserved */
-      0, 0, 0                /* layer masks ignored */
-    };
-
-    if ((mode->drawableType | drawableTypeOverride) & GLX_WINDOW_BIT)
-      pfd.dwFlags |= PFD_DRAW_TO_WINDOW; /* support window */
-
-    if ((mode->drawableType | drawableTypeOverride) & GLX_PIXMAP_BIT)
-      pfd.dwFlags |= (PFD_DRAW_TO_BITMAP | PFD_SUPPORT_GDI); /* supports software rendering to bitmap */
-
-    if (mode->stereoMode) {
-        pfd.dwFlags |= PFD_STEREO;
-    }
-    if (mode->doubleBufferMode) {
-        pfd.dwFlags |= PFD_DOUBLEBUFFER;
-    }
-
-    pfd.iPixelType = PFD_TYPE_RGBA;
-    pfd.cColorBits = mode->redBits + mode->greenBits + mode->blueBits;
-    pfd.cRedBits = mode->redBits;
-    pfd.cRedShift = 0; /* FIXME */
-    pfd.cGreenBits = mode->greenBits;
-    pfd.cGreenShift = 0; /* FIXME  */
-    pfd.cBlueBits = mode->blueBits;
-    pfd.cBlueShift = 0; /* FIXME */
-    pfd.cAlphaBits = mode->alphaBits;
-    pfd.cAlphaShift = 0; /* FIXME */
-
-    pfd.cAccumBits = mode->accumRedBits + mode->accumGreenBits + mode->accumBlueBits + mode->accumAlphaBits;
-    pfd.cAccumRedBits = mode->accumRedBits;
-    pfd.cAccumGreenBits = mode->accumGreenBits;
-    pfd.cAccumBlueBits = mode->accumBlueBits;
-    pfd.cAccumAlphaBits = mode->accumAlphaBits;
-
-    pfd.cDepthBits = mode->depthBits;
-    pfd.cStencilBits = mode->stencilBits;
-    pfd.cAuxBuffers = mode->numAuxBuffers;
-
-    /* mode->level ? */
-    /* mode->pixmapMode ? */
-
-    *pfdret = pfd;
-
-    return 0;
-}
-
-#define SET_ATTR_VALUE(attr, value) { attribList[i++] = attr; attribList[i++] = value; assert(i < NUM_ELEMENTS(attribList)); }
-
-static int
-fbConfigToPixelFormatIndex(HDC hdc, __GLXconfig *mode, int drawableTypeOverride, glxWinScreen *winScreen)
-{
-  UINT numFormats;
-  unsigned int i = 0;
-
-  /* convert fbConfig to attr-value list  */
-  int attribList[60];
-
-  SET_ATTR_VALUE(WGL_SUPPORT_OPENGL_ARB, TRUE);
-  SET_ATTR_VALUE(WGL_PIXEL_TYPE_ARB, (mode->visualType == GLX_TRUE_COLOR) ? WGL_TYPE_RGBA_ARB : WGL_TYPE_COLORINDEX_ARB);
-  SET_ATTR_VALUE(WGL_COLOR_BITS_ARB, (mode->visualType == GLX_TRUE_COLOR) ? mode->rgbBits : mode->indexBits);
-  SET_ATTR_VALUE(WGL_RED_BITS_ARB, mode->redBits);
-  SET_ATTR_VALUE(WGL_GREEN_BITS_ARB, mode->greenBits);
-  SET_ATTR_VALUE(WGL_BLUE_BITS_ARB, mode->blueBits);
-  SET_ATTR_VALUE(WGL_ALPHA_BITS_ARB, mode->alphaBits);
-  SET_ATTR_VALUE(WGL_ACCUM_RED_BITS_ARB, mode->accumRedBits);
-  SET_ATTR_VALUE(WGL_ACCUM_GREEN_BITS_ARB, mode->accumGreenBits);
-  SET_ATTR_VALUE(WGL_ACCUM_BLUE_BITS_ARB, mode->accumBlueBits);
-  SET_ATTR_VALUE(WGL_ACCUM_ALPHA_BITS_ARB, mode->accumAlphaBits);
-  SET_ATTR_VALUE(WGL_DEPTH_BITS_ARB, mode->depthBits);
-  SET_ATTR_VALUE(WGL_STENCIL_BITS_ARB, mode->stencilBits);
-  SET_ATTR_VALUE(WGL_AUX_BUFFERS_ARB, mode->numAuxBuffers);
-
-  if (mode->doubleBufferMode)
-    SET_ATTR_VALUE(WGL_DOUBLE_BUFFER_ARB, TRUE);
-
-  if (mode->stereoMode)
-    SET_ATTR_VALUE(WGL_STEREO_ARB, TRUE);
-
-  // Some attributes are only added to the list if the value requested is not 'don't care', as exactly matching that is daft..
-  if (mode->swapMethod == GLX_SWAP_EXCHANGE_OML)
-    SET_ATTR_VALUE(WGL_SWAP_METHOD_ARB, WGL_SWAP_EXCHANGE_ARB);
-
-  if (mode->swapMethod == GLX_SWAP_COPY_OML)
-    SET_ATTR_VALUE(WGL_SWAP_COPY_ARB, TRUE);
-
-  // XXX: this should probably be the other way around, but that messes up drawableTypeOverride
-  if (mode->visualRating == GLX_SLOW_VISUAL_EXT)
-    SET_ATTR_VALUE(WGL_ACCELERATION_ARB, WGL_NO_ACCELERATION_ARB);
-
-  // must support all the drawable types the mode supports
-  if ((mode->drawableType | drawableTypeOverride) & GLX_WINDOW_BIT)
-    SET_ATTR_VALUE(WGL_DRAW_TO_WINDOW_ARB,TRUE);
-
-  // XXX: this is a horrible hacky heuristic, in fact this whole drawableTypeOverride thing is a bad idea
-  // try to avoid asking for formats which don't exist (by not asking for all when adjusting the config to include the drawableTypeOverride)
-  if (drawableTypeOverride == GLX_WINDOW_BIT)
-    {
-      if (mode->drawableType & GLX_PIXMAP_BIT)
-        SET_ATTR_VALUE(WGL_DRAW_TO_BITMAP_ARB, TRUE);
-
-      if (mode->drawableType & GLX_PBUFFER_BIT)
-        if (winScreen->has_WGL_ARB_pbuffer)
-          SET_ATTR_VALUE(WGL_DRAW_TO_PBUFFER_ARB, TRUE);
-    }
-  else
-    {
-      if (drawableTypeOverride & GLX_PIXMAP_BIT)
-        SET_ATTR_VALUE(WGL_DRAW_TO_BITMAP_ARB, TRUE);
-
-      if (drawableTypeOverride & GLX_PBUFFER_BIT)
-        if (winScreen->has_WGL_ARB_pbuffer)
-          SET_ATTR_VALUE(WGL_DRAW_TO_PBUFFER_ARB, TRUE);
-    }
-
-  SET_ATTR_VALUE(0, 0); // terminator
-
-  /* choose the first match */
-  {
-    int pixelFormatIndex;
-
-    if (!wglChoosePixelFormatARBWrapper(hdc, attribList, NULL, 1, &pixelFormatIndex, &numFormats))
-      {
-        ErrorF("wglChoosePixelFormat error: %s\n", glxWinErrorMessage());
-      }
-    else
-      {
-        if (numFormats > 0)
-          {
-            GLWIN_DEBUG_MSG("wglChoosePixelFormat: chose pixelFormatIndex %d)", pixelFormatIndex);
-            return pixelFormatIndex;
-          }
-        else
-          ErrorF("wglChoosePixelFormat couldn't decide\n");
-      }
-  }
-
-  return 0;
-}
-
-/* ---------------------------------------------------------------------- */
-
-#define BITS_AND_SHIFT_TO_MASK(bits,mask) (((1<<(bits))-1) << (mask))
-
-//
-// Create the GLXconfigs using DescribePixelFormat()
-//
-static void
-glxWinCreateConfigs(HDC hdc, glxWinScreen *screen)
-{
-  GLXWinConfig *c, *result, *prev = NULL;
-  int numConfigs = 0;
-  int i = 0;
-  int n = 0;
-  PIXELFORMATDESCRIPTOR pfd;
-
-  GLWIN_DEBUG_MSG("glxWinCreateConfigs");
-
-  screen->base.numFBConfigs = 0;
-  screen->base.fbconfigs = NULL;
-
-  // get the number of pixelformats
-  numConfigs = DescribePixelFormat(hdc, 1, sizeof(PIXELFORMATDESCRIPTOR), NULL);
-  GLWIN_DEBUG_MSG("DescribePixelFormat says %d possible pixel formats", numConfigs);
-
-  /* alloc */
-  result = xalloc(sizeof(GLXWinConfig) * numConfigs);
-
-  if (NULL == result)
-    {
-      return;
-    }
-
-  memset(result, 0, sizeof(GLXWinConfig) * numConfigs);
-  n = 0;
-
-  /* fill in configs */
-  for (i = 0;  i < numConfigs; i++)
-    {
-      int rc;
-
-      c = &(result[i]);
-      c->base.next = NULL;
-      c->pixelFormatIndex = i+1;
-
-      rc = DescribePixelFormat(hdc, i+1, sizeof(PIXELFORMATDESCRIPTOR), &pfd);
-
-      if (!rc)
-        {
-          ErrorF("DescribePixelFormat failed for index %d, error %s\n", i+1, glxWinErrorMessage());
-          break;
-        }
-
-#ifdef _DEBUG
-      if (glxWinDebugSettings.dumpPFD)
-        pfdOut(&pfd);
-#endif
-
-      if (!(pfd.dwFlags & (PFD_DRAW_TO_WINDOW | PFD_DRAW_TO_BITMAP)) || !(pfd.dwFlags & PFD_SUPPORT_OPENGL))
-        {
-          GLWIN_DEBUG_MSG("pixelFormat %d has unsuitable flags 0x%08lx, skipping", i+1, pfd.dwFlags);
-          continue;
-        }
-
-      c->base.doubleBufferMode = (pfd.dwFlags & PFD_DOUBLEBUFFER) ? GL_TRUE : GL_FALSE;
-      c->base.stereoMode = (pfd.dwFlags & PFD_STEREO) ? GL_TRUE : GL_FALSE;
-
-      c->base.redBits = pfd.cRedBits;
-      c->base.greenBits = pfd.cGreenBits;
-      c->base.blueBits = pfd.cBlueBits;
-      c->base.alphaBits = pfd.cAlphaBits;
-
-      c->base.redMask = BITS_AND_SHIFT_TO_MASK(pfd.cRedBits, pfd.cRedShift);
-      c->base.greenMask =  BITS_AND_SHIFT_TO_MASK(pfd.cGreenBits, pfd.cGreenShift);
-      c->base.blueMask = BITS_AND_SHIFT_TO_MASK(pfd.cBlueBits, pfd.cBlueShift);
-      c->base.alphaMask = BITS_AND_SHIFT_TO_MASK(pfd.cAlphaBits, pfd.cAlphaShift);
-
-      c->base.rgbBits = pfd.cColorBits;
-
-      if (pfd.iPixelType == PFD_TYPE_COLORINDEX)
-        {
-          c->base.indexBits = pfd.cColorBits;
-        }
-      else
-        {
-          c->base.indexBits = 0;
-        }
-
-      c->base.accumRedBits = pfd.cAccumRedBits;
-      c->base.accumGreenBits = pfd.cAccumGreenBits;
-      c->base.accumBlueBits = pfd.cAccumBlueBits;
-      c->base.accumAlphaBits = pfd.cAccumAlphaBits;
-      //  pfd.cAccumBits;
-
-      c->base.depthBits = pfd.cDepthBits;
-      c->base.stencilBits = pfd.cStencilBits;
-      c->base.numAuxBuffers = pfd.cAuxBuffers;
-
-      // pfd.iLayerType; // ignored
-      c->base.level = 0;
-      // pfd.dwLayerMask; // ignored
-      // pfd.dwDamageMask;  // ignored
-
-      c->base.pixmapMode = 0;
-      c->base.visualID = -1;  // will be set by __glXScreenInit()
-
-      /* EXT_visual_rating / GLX 1.2 */
-      if (pfd.dwFlags & PFD_GENERIC_FORMAT)
-        {
-          c->base.visualRating = GLX_SLOW_VISUAL_EXT;
-        }
-      else
-        {
-          // PFD_GENERIC_ACCELERATED is not considered, so this may be MCD or ICD acclerated...
-          c->base.visualRating = GLX_NONE_EXT;
-        }
-
-      /* EXT_visual_info / GLX 1.2 */
-      if (pfd.iPixelType == PFD_TYPE_COLORINDEX)
-        {
-          c->base.visualType = GLX_STATIC_COLOR;
-        }
-      else
-        {
-          c->base.visualType = GLX_TRUE_COLOR;
-        }
-
-      // pfd.dwVisibleMask; ???
-      c->base.transparentPixel = GLX_NONE;
-      c->base.transparentRed = GLX_NONE;
-      c->base.transparentGreen = GLX_NONE;
-      c->base.transparentBlue = GLX_NONE;
-      c->base.transparentAlpha = GLX_NONE;
-      c->base.transparentIndex = GLX_NONE;
-
-      /* ARB_multisample / SGIS_multisample */
-      c->base.sampleBuffers = 0;
-      c->base.samples = 0;
-
-      /* SGIX_fbconfig / GLX 1.3 */
-      c->base.drawableType = (((pfd.dwFlags & PFD_DRAW_TO_WINDOW) ? GLX_WINDOW_BIT : 0)
-                         | ((pfd.dwFlags & PFD_DRAW_TO_BITMAP) ? GLX_PIXMAP_BIT : 0));
-
-      if (pfd.iPixelType == PFD_TYPE_COLORINDEX)
-        {
-          c->base.renderType = GLX_RGBA_BIT | GLX_COLOR_INDEX_BIT;
-        }
-      else
-        {
-          c->base.renderType = GLX_RGBA_BIT;
-        }
-
-      c->base.xRenderable = GL_TRUE;
-      c->base.fbconfigID = -1; // will be set by __glXScreenInit()
-
-      /* SGIX_pbuffer / GLX 1.3 */
-      // XXX: How can we find these values out ???
-      c->base.maxPbufferWidth = -1;
-      c->base.maxPbufferHeight = -1;
-      c->base.maxPbufferPixels = -1;
-      c->base.optimalPbufferWidth = 0; // there is no optimal value
-      c->base.optimalPbufferHeight = 0;
-
-      /* SGIX_visual_select_group */
-      // arrange for visuals with the best acceleration to be preferred in selection
-      switch (pfd.dwFlags & (PFD_GENERIC_FORMAT | PFD_GENERIC_ACCELERATED))
-        {
-        case 0:
-          c->base.visualSelectGroup = 2;
-          break;
-
-        case PFD_GENERIC_ACCELERATED:
-          c->base.visualSelectGroup = 1;
-          break;
-
-        case PFD_GENERIC_FORMAT:
-          c->base.visualSelectGroup = 0;
-          break;
-
-        default:
-          ;
-          // "can't happen"
-        }
-
-      /* OML_swap_method */
-      if (pfd.dwFlags & PFD_SWAP_EXCHANGE)
-        c->base.swapMethod = GLX_SWAP_EXCHANGE_OML;
-      else if (pfd.dwFlags & PFD_SWAP_COPY)
-        c->base.swapMethod = GLX_SWAP_COPY_OML;
-      else
-        c->base.swapMethod = GLX_SWAP_UNDEFINED_OML;
-
-      /* EXT_import_context */
-      c->base.screen = screen->base.pScreen->myNum;
-
-      /* EXT_texture_from_pixmap */
-      c->base.bindToTextureRgb = -1;
-      c->base.bindToTextureRgba = -1;
-      c->base.bindToMipmapTexture = -1;
-      c->base.bindToTextureTargets = -1;
-      c->base.yInverted = -1;
-
-      n++;
-
-      // update previous config to point to this config
-      if (prev)
-        prev->base.next = &(c->base);
-
-      prev = c;
-    }
-
-  GLWIN_DEBUG_MSG("found %d pixelFormats suitable for conversion to fbConfigs", n);
-
-  screen->base.numFBConfigs = n;
-  screen->base.fbconfigs = &(result->base);
-}
-
-// helper function to access an attribute value from an attribute value array by attribute
-static
-int getAttrValue(const int attrs[], int values[], unsigned int num, int attr, int fallback)
-{
-  unsigned int i;
-  for (i = 0; i < num; i++)
-    {
-      if (attrs[i] == attr)
-        {
-          GLWIN_TRACE_MSG("getAttrValue attr 0x%x, value %d", attr, values[i]);
-          return values[i];
-        }
-    }
-
-  ErrorF("getAttrValue failed to find attr 0x%x, using default value %d\n", attr, fallback);
-  return fallback;
-}
-
-//
-// Create the GLXconfigs using wglGetPixelFormatAttribfvARB() extension
-//
-static void
-glxWinCreateConfigsExt(HDC hdc, glxWinScreen *screen)
-{
-  GLXWinConfig *c, *result, *prev = NULL;
-  int i = 0;
-  int n = 0;
-
-  const int attr = WGL_NUMBER_PIXEL_FORMATS_ARB;
-  int numConfigs;
-
-  int attrs[50];
-  unsigned int num_attrs = 0;
-
-  GLWIN_DEBUG_MSG("glxWinCreateConfigsExt");
-
-  screen->base.numFBConfigs = 0;
-  screen->base.fbconfigs = NULL;
-
-  if (!wglGetPixelFormatAttribivARBWrapper(hdc, 0, 0, 1, &attr, &numConfigs))
-    {
-      ErrorF("wglGetPixelFormatAttribivARB failed for WGL_NUMBER_PIXEL_FORMATS_ARB: %s\n", glxWinErrorMessage());
-      return;
-    }
-
-  GLWIN_DEBUG_MSG("wglGetPixelFormatAttribivARB says %d possible pixel formats", numConfigs);
-
-  /* alloc */
-  result = xalloc(sizeof(GLXWinConfig) * numConfigs);
-
-  if (NULL == result)
-    {
-      return;
-    }
-
-  memset(result, 0, sizeof(GLXWinConfig) * numConfigs);
-  n = 0;
-
-#define ADD_ATTR(a) { attrs[num_attrs++] = a; assert(num_attrs < NUM_ELEMENTS(attrs)); }
-
-  ADD_ATTR(WGL_DRAW_TO_WINDOW_ARB);
-  ADD_ATTR(WGL_DRAW_TO_BITMAP_ARB);
-  ADD_ATTR(WGL_ACCELERATION_ARB);
-  ADD_ATTR(WGL_SWAP_LAYER_BUFFERS_ARB);
-  ADD_ATTR(WGL_NUMBER_OVERLAYS_ARB);
-  ADD_ATTR(WGL_NUMBER_UNDERLAYS_ARB);
-  ADD_ATTR(WGL_TRANSPARENT_ARB);
-  ADD_ATTR(WGL_TRANSPARENT_RED_VALUE_ARB);
-  ADD_ATTR(WGL_TRANSPARENT_GREEN_VALUE_ARB);
-  ADD_ATTR(WGL_TRANSPARENT_GREEN_VALUE_ARB);
-  ADD_ATTR(WGL_TRANSPARENT_ALPHA_VALUE_ARB);
-  ADD_ATTR(WGL_SUPPORT_OPENGL_ARB);
-  ADD_ATTR(WGL_DOUBLE_BUFFER_ARB);
-  ADD_ATTR(WGL_STEREO_ARB);
-  ADD_ATTR(WGL_PIXEL_TYPE_ARB);
-  ADD_ATTR(WGL_COLOR_BITS_ARB);
-  ADD_ATTR(WGL_RED_BITS_ARB);
-  ADD_ATTR(WGL_RED_SHIFT_ARB);
-  ADD_ATTR(WGL_GREEN_BITS_ARB);
-  ADD_ATTR(WGL_GREEN_SHIFT_ARB);
-  ADD_ATTR(WGL_BLUE_BITS_ARB);
-  ADD_ATTR(WGL_BLUE_SHIFT_ARB);
-  ADD_ATTR(WGL_ALPHA_BITS_ARB);
-  ADD_ATTR(WGL_ALPHA_SHIFT_ARB);
-  ADD_ATTR(WGL_ACCUM_RED_BITS_ARB);
-  ADD_ATTR(WGL_ACCUM_GREEN_BITS_ARB);
-  ADD_ATTR(WGL_ACCUM_BLUE_BITS_ARB);
-  ADD_ATTR(WGL_ACCUM_ALPHA_BITS_ARB);
-  ADD_ATTR(WGL_DEPTH_BITS_ARB);
-  ADD_ATTR(WGL_STENCIL_BITS_ARB);
-  ADD_ATTR(WGL_AUX_BUFFERS_ARB);
-  ADD_ATTR(WGL_SWAP_METHOD_ARB);
-
-  if (screen->has_WGL_ARB_multisample)
-    {
-      // we may not query these attrs if WGL_ARB_multisample is not offered
-      ADD_ATTR(WGL_SAMPLE_BUFFERS_ARB);
-      ADD_ATTR(WGL_SAMPLES_ARB);
-    }
-
-  if (screen->has_WGL_ARB_render_texture)
-    {
-      // we may not query these attrs if WGL_ARB_render_texture is not offered
-      ADD_ATTR(WGL_BIND_TO_TEXTURE_RGB_ARB);
-      ADD_ATTR(WGL_BIND_TO_TEXTURE_RGBA_ARB);
-    }
-
-  if (screen->has_WGL_ARB_pbuffer)
-    {
-      // we may not query these attrs if WGL_ARB_pbuffer is not offered
-      ADD_ATTR(WGL_DRAW_TO_PBUFFER_ARB);
-      ADD_ATTR(WGL_MAX_PBUFFER_PIXELS_ARB);
-      ADD_ATTR(WGL_MAX_PBUFFER_WIDTH_ARB);
-      ADD_ATTR(WGL_MAX_PBUFFER_HEIGHT_ARB);
-    }
-
-  /* fill in configs */
-  for (i = 0;  i < numConfigs; i++)
-    {
-      int sizevalues=num_attrs*sizeof(int);
-      int *values=(int*)_alloca(sizevalues);
-
-      memset(values,0,sizevalues);
-
-      c = &(result[i]);
-      c->base.next = NULL;
-      c->pixelFormatIndex = i+1;
-
-      if (!wglGetPixelFormatAttribivARBWrapper(hdc, i+1, 0, num_attrs, attrs, values))
-        {
-          ErrorF("wglGetPixelFormatAttribivARB failed for index %d, error %s\n", i+1, glxWinErrorMessage());
-          break;
-        }
-
-#define ATTR_VALUE(a, d) getAttrValue(attrs, values, num_attrs, (a), (d))
-
-      if (!ATTR_VALUE(WGL_SUPPORT_OPENGL_ARB, 0))
-        {
-          GLWIN_DEBUG_MSG("pixelFormat %d isn't WGL_SUPPORT_OPENGL_ARB, skipping", i+1);
-          continue;
-        }
-
-      c->base.doubleBufferMode = ATTR_VALUE(WGL_DOUBLE_BUFFER_ARB, 0) ? GL_TRUE : GL_FALSE;
-      c->base.stereoMode = ATTR_VALUE(WGL_STEREO_ARB, 0) ? GL_TRUE : GL_FALSE;
-
-      c->base.redBits = ATTR_VALUE(WGL_RED_BITS_ARB, 0);
-      c->base.greenBits = ATTR_VALUE(WGL_GREEN_BITS_ARB, 0);
-      c->base.blueBits = ATTR_VALUE(WGL_BLUE_BITS_ARB, 0);
-      c->base.alphaBits = ATTR_VALUE(WGL_ALPHA_BITS_ARB, 0);
-
-      c->base.redMask = BITS_AND_SHIFT_TO_MASK(c->base.redBits, ATTR_VALUE(WGL_RED_SHIFT_ARB, 0));
-      c->base.greenMask = BITS_AND_SHIFT_TO_MASK(c->base.greenBits, ATTR_VALUE(WGL_GREEN_SHIFT_ARB, 0));
-      c->base.blueMask = BITS_AND_SHIFT_TO_MASK(c->base.blueBits, ATTR_VALUE(WGL_BLUE_SHIFT_ARB, 0));
-      c->base.alphaMask = BITS_AND_SHIFT_TO_MASK(c->base.alphaBits, ATTR_VALUE(WGL_ALPHA_SHIFT_ARB, 0));
-
-      switch (ATTR_VALUE(WGL_PIXEL_TYPE_ARB, 0))
-        {
-        case WGL_TYPE_COLORINDEX_ARB:
-          c->base.indexBits = ATTR_VALUE(WGL_COLOR_BITS_ARB, 0);
-          c->base.rgbBits = 0;
-          c->base.visualType = GLX_STATIC_COLOR;
-          break;
-
-        case WGL_TYPE_RGBA_FLOAT_ARB:
-          GLWIN_DEBUG_MSG("pixelFormat %d is WGL_TYPE_RGBA_FLOAT_ARB, skipping", i+1);
-          continue;
-
-        case WGL_TYPE_RGBA_UNSIGNED_FLOAT_EXT:
-          GLWIN_DEBUG_MSG("pixelFormat %d is WGL_TYPE_RGBA_UNSIGNED_FLOAT_EXT, skipping", i+1);
-          continue;
-
-        case WGL_TYPE_RGBA_ARB:
-          c->base.indexBits = 0;
-          c->base.rgbBits = ATTR_VALUE(WGL_COLOR_BITS_ARB, 0);
-          c->base.visualType = GLX_TRUE_COLOR;
-          break;
-
-        default:
-          ErrorF("wglGetPixelFormatAttribivARB returned unknown value 0x%x for WGL_PIXEL_TYPE_ARB\n", ATTR_VALUE(WGL_PIXEL_TYPE_ARB, 0));
-          continue;
-        }
-
-      c->base.accumRedBits = ATTR_VALUE(WGL_ACCUM_RED_BITS_ARB, 0);
-      c->base.accumGreenBits = ATTR_VALUE(WGL_ACCUM_GREEN_BITS_ARB, 0);
-      c->base.accumBlueBits = ATTR_VALUE(WGL_ACCUM_BLUE_BITS_ARB, 0);
-      c->base.accumAlphaBits = ATTR_VALUE(WGL_ACCUM_ALPHA_BITS_ARB, 0);
-
-      c->base.depthBits = ATTR_VALUE(WGL_DEPTH_BITS_ARB, 0);
-      c->base.stencilBits = ATTR_VALUE(WGL_STENCIL_BITS_ARB, 0);
-      c->base.numAuxBuffers = ATTR_VALUE(WGL_AUX_BUFFERS_ARB, 0);
-
-      {
-        int layers = ATTR_VALUE(WGL_NUMBER_OVERLAYS_ARB,0) + ATTR_VALUE(WGL_NUMBER_UNDERLAYS_ARB, 0);
-
-        if (layers > 0)
-          {
-            ErrorF("pixelFormat %d: has %d overlay, %d underlays which aren't currently handled", i, ATTR_VALUE(WGL_NUMBER_OVERLAYS_ARB,0), ATTR_VALUE(WGL_NUMBER_UNDERLAYS_ARB, 0));
-            // XXX: need to iterate over layers?
-          }
-      }
-      c->base.level = 0;
-
-      c->base.pixmapMode = 0; // ???
-      c->base.visualID = -1;  // will be set by __glXScreenInit()
-
-      /* EXT_visual_rating / GLX 1.2 */
-      switch (ATTR_VALUE(WGL_ACCELERATION_ARB, 0))
-        {
-        default:
-          ErrorF("wglGetPixelFormatAttribivARB returned unknown value 0x%x for WGL_ACCELERATION_ARB\n", ATTR_VALUE(WGL_ACCELERATION_ARB, 0));
-
-        case WGL_NO_ACCELERATION_ARB:
-          c->base.visualRating = GLX_SLOW_VISUAL_EXT;
-          break;
-
-        case WGL_GENERIC_ACCELERATION_ARB:
-        case WGL_FULL_ACCELERATION_ARB:
-          c->base.visualRating = GLX_NONE_EXT;
-          break;
-        }
-
-      /* EXT_visual_info / GLX 1.2 */
-      // c->base.visualType is set above
-      if (ATTR_VALUE(WGL_TRANSPARENT_ARB, 0))
-        {
-          c->base.transparentPixel = (c->base.visualType == GLX_TRUE_COLOR) ? GLX_TRANSPARENT_RGB_EXT : GLX_TRANSPARENT_INDEX_EXT;
-          c->base.transparentRed = ATTR_VALUE(WGL_TRANSPARENT_RED_VALUE_ARB, 0);
-          c->base.transparentGreen = ATTR_VALUE(WGL_TRANSPARENT_GREEN_VALUE_ARB, 0);
-          c->base.transparentBlue = ATTR_VALUE(WGL_TRANSPARENT_BLUE_VALUE_ARB, 0);
-          c->base.transparentAlpha = ATTR_VALUE(WGL_TRANSPARENT_ALPHA_VALUE_ARB, 0);
-          c->base.transparentIndex = ATTR_VALUE(WGL_TRANSPARENT_INDEX_VALUE_ARB, 0);
-        }
-      else
-        {
-          c->base.transparentPixel = GLX_NONE_EXT;
-          c->base.transparentRed = GLX_NONE;
-          c->base.transparentGreen = GLX_NONE;
-          c->base.transparentBlue = GLX_NONE;
-          c->base.transparentAlpha = GLX_NONE;
-          c->base.transparentIndex = GLX_NONE;
-        }
-
-      /* ARB_multisample / SGIS_multisample */
-      if (screen->has_WGL_ARB_multisample)
-        {
-          c->base.sampleBuffers = ATTR_VALUE(WGL_SAMPLE_BUFFERS_ARB, 0);
-          c->base.samples = ATTR_VALUE(WGL_SAMPLES_ARB, 0);
-        }
-      else
-        {
-          c->base.sampleBuffers = 0;
-          c->base.samples = 0;
-        }
-
-      /* SGIX_fbconfig / GLX 1.3 */
-      c->base.drawableType = ((ATTR_VALUE(WGL_DRAW_TO_WINDOW_ARB, 0) ? GLX_WINDOW_BIT : 0)
-                         | (ATTR_VALUE(WGL_DRAW_TO_BITMAP_ARB, 0) ? GLX_PIXMAP_BIT : 0)
-                         | (ATTR_VALUE(WGL_DRAW_TO_PBUFFER_ARB, 0) ? GLX_PBUFFER_BIT : 0));
-
-      /*
-        Assume OpenGL RGBA rendering is available on all visuals
-        (it is specified to render to red component in single-channel visuals,
-        if supported, but there doesn't seem to be any mechanism to check if it
-        is supported)
-
-        Color index rendering is only supported on single-channel visuals
-      */
-      if (c->base.visualType == GLX_STATIC_COLOR)
-        {
-          c->base.renderType = GLX_RGBA_BIT | GLX_COLOR_INDEX_BIT;
-        }
-      else
-        {
-          c->base.renderType = GLX_RGBA_BIT;
-        }
-
-      c->base.xRenderable = GL_TRUE;
-      c->base.fbconfigID = -1; // will be set by __glXScreenInit()
-
-      /* SGIX_pbuffer / GLX 1.3 */
-      if (screen->has_WGL_ARB_pbuffer)
-        {
-          c->base.maxPbufferWidth = ATTR_VALUE(WGL_MAX_PBUFFER_WIDTH_ARB, -1);
-          c->base.maxPbufferHeight = ATTR_VALUE(WGL_MAX_PBUFFER_HEIGHT_ARB, -1);
-          c->base.maxPbufferPixels =  ATTR_VALUE(WGL_MAX_PBUFFER_PIXELS_ARB, -1);
-        }
-      else
-        {
-          c->base.maxPbufferWidth = -1;
-          c->base.maxPbufferHeight = -1;
-          c->base.maxPbufferPixels =  -1;
-        }
-      c->base.optimalPbufferWidth = 0; // there is no optimal value
-      c->base.optimalPbufferHeight = 0;
-
-      /* SGIX_visual_select_group */
-      // arrange for visuals with the best acceleration to be preferred in selection
-      switch (ATTR_VALUE(WGL_ACCELERATION_ARB, 0))
-        {
-        case WGL_FULL_ACCELERATION_ARB:
-          c->base.visualSelectGroup = 2;
-          break;
-
-        case WGL_GENERIC_ACCELERATION_ARB:
-          c->base.visualSelectGroup = 1;
-          break;
-
-        default:
-        case WGL_NO_ACCELERATION_ARB:
-          c->base.visualSelectGroup = 0;
-          break;
-        }
-
-      /* OML_swap_method */
-      switch (ATTR_VALUE(WGL_SWAP_METHOD_ARB, 0))
-        {
-        case WGL_SWAP_EXCHANGE_ARB:
-          c->base.swapMethod = GLX_SWAP_EXCHANGE_OML;
-          break;
-
-        case WGL_SWAP_COPY_ARB:
-          c->base.swapMethod = GLX_SWAP_COPY_OML;
-          break;
-
-        default:
-          ErrorF("wglGetPixelFormatAttribivARB returned unknown value 0x%x for WGL_SWAP_METHOD_ARB\n", ATTR_VALUE(WGL_SWAP_METHOD_ARB, 0));
-
-        case WGL_SWAP_UNDEFINED_ARB:
-          c->base.swapMethod = GLX_SWAP_UNDEFINED_OML;
-        }
-
-      /* EXT_import_context */
-      c->base.screen = screen->base.pScreen->myNum;
-
-      /* EXT_texture_from_pixmap */
-      /*
-         Mesa's DRI configs always have bindToTextureRgb/Rgba TRUE (see driCreateConfigs(), so setting
-         bindToTextureRgb/bindToTextureRgba to FALSE means that swrast can't find any fbConfigs to use,
-         so setting these to 0, even if we know bindToTexture isn't available, isn't a good idea...
-       */
-      if (screen->has_WGL_ARB_render_texture)
-        {
-          c->base.bindToTextureRgb = ATTR_VALUE(WGL_BIND_TO_TEXTURE_RGB_ARB, -1);
-          c->base.bindToTextureRgba = ATTR_VALUE(WGL_BIND_TO_TEXTURE_RGBA_ARB, -1);
-        }
-      else
-        {
-          c->base.bindToTextureRgb = -1;
-          c->base.bindToTextureRgba = -1;
-        }
-      c->base.bindToMipmapTexture = -1;
-      c->base.bindToTextureTargets = GLX_TEXTURE_1D_BIT_EXT | GLX_TEXTURE_2D_BIT_EXT | GLX_TEXTURE_RECTANGLE_BIT_EXT;
-      c->base.yInverted = -1;
-
-      n++;
-
-      // update previous config to point to this config
-      if (prev)
-        prev->base.next = &(c->base);
-
-      prev = c;
-    }
-
-  screen->base.numFBConfigs = n;
-  screen->base.fbconfigs = &(result->base);
-}
+/*

+ * File: indirect.c

+ * Purpose: A GLX implementation that uses Windows OpenGL library

+ *

+ * Authors: Alexander Gottwald

+ *          Jon TURNEY

+ *

+ * Copyright (c) Jon TURNEY 2009

+ * Copyright (c) Alexander Gottwald 2004

+ *

+ * Portions of this file are copied from GL/apple/indirect.c,

+ * which contains the following copyright:

+ *

+ * Copyright (c) 2007, 2008, 2009 Apple Inc.

+ * Copyright (c) 2004 Torrey T. Lyons. All Rights Reserved.

+ * Copyright (c) 2002 Greg Parker. All Rights Reserved.

+ *

+ * Portions of this file are copied from Mesa's xf86glx.c,

+ * which contains the following copyright:

+ *

+ * Copyright 1998-1999 Precision Insight, Inc., Cedar Park, Texas.

+ * All Rights Reserved.

+ *

+ *

+ * Permission is hereby granted, free of charge, to any person obtaining a

+ * copy of this software and associated documentation files (the "Software"),

+ * to deal in the Software without restriction, including without limitation

+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,

+ * and/or sell copies of the Software, and to permit persons to whom the

+ * Software is furnished to do so, subject to the following conditions:

+ *

+ * The above copyright notice and this permission notice shall be included in

+ * all copies or substantial portions of the Software.

+ *

+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL

+ * THE ABOVE LISTED COPYRIGHT HOLDER(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR

+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,

+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER

+ * DEALINGS IN THE SOFTWARE.

+ */

+

+/*

+  TODO:

+  - hook up remaining unimplemented extensions

+  - research what guarantees glXWaitX, glXWaitGL are supposed to offer, and implement then

+    using GdiFlush and/or glFinish

+  - pbuffer clobbering: we don't get async notification, but can we arrange to emit the

+    event when we notice it's been clobbered? at the very least, check if it's been clobbered

+    before using it?

+  - are the __GLXConfig * we get handed back ones we are made (so we can extend the structure

+    with privates?) Or are they created inside the GLX core as well?

+*/

+

+/*

+  MSDN clarifications:

+

+  It says SetPixelFormat()'s PIXELFORMATDESCRIPTOR pointer argument has no effect

+  except on metafiles, this seems to mean that as it's ok to supply NULL if the DC

+  is not for a metafile

+

+  wglMakeCurrent ignores the hdc if hglrc is NULL, so wglMakeCurrent(NULL, NULL)

+  is used to make no context current

+

+*/

+

+#ifdef HAVE_XWIN_CONFIG_H

+#include <xwin-config.h>

+#endif

+

+#include "glwindows.h"

+#include <glx/glxserver.h>

+#include <glx/glxutil.h>

+#include <glx/extension_string.h>

+#include <GL/glxtokens.h>

+

+#include <winpriv.h>

+#include <wgl_ext_api.h>

+#include "win.h"

+#include <winmsg.h>

+

+extern Bool			g_fXdmcpEnabled;

+extern Bool g_fNativeGl;

+

+#define NUM_ELEMENTS(x) (sizeof(x)/ sizeof(x[1]))

+

+/* ---------------------------------------------------------------------- */

+/*

+ *   structure definitions

+ */

+

+typedef struct __GLXWinContext  __GLXWinContext;

+typedef struct __GLXWinDrawable __GLXWinDrawable;

+typedef struct __GLXWinScreen glxWinScreen;

+typedef struct __GLXWinConfig GLXWinConfig;

+

+struct __GLXWinContext {

+  __GLXcontext base;

+  HGLRC ctx;                         /* Windows GL Context */

+  HDC hDC;                           /* Windows device context */

+  HDC hreadDC;                     /* Windows device read context */

+  __GLXWinContext *shareContext;     /* Context with which we will share display lists and textures */

+  HWND hwnd;                         /* For detecting when HWND has changed */

+  HWND hreadwnd;

+};

+

+struct __GLXWinDrawable

+{

+  __GLXdrawable base;

+  __GLXWinContext *drawContext;

+

+  /* If this drawable is GLX_DRAWABLE_PBUFFER */

+  HPBUFFERARB hPbuffer;

+

+  /* If this drawable is GLX_DRAWABLE_PIXMAP */

+  HDC dibDC;

+  HBITMAP hDIB;

+  HBITMAP hOldDIB; /* original DIB for DC */

+  void *pOldBits; /* original pBits for this drawable's pixmap */

+};

+

+struct __GLXWinScreen

+{

+  __GLXscreen base;

+

+  /* Supported GLX extensions */

+  unsigned char glx_enable_bits[__GLX_EXT_BYTES];

+

+  Bool has_WGL_ARB_multisample;

+  Bool has_WGL_ARB_pixel_format;

+  Bool has_WGL_ARB_pbuffer;

+  Bool has_WGL_ARB_render_texture;

+

+  /* wrapped screen functions */

+  RealizeWindowProcPtr RealizeWindow;

+  UnrealizeWindowProcPtr UnrealizeWindow;

+  DestroyWindowProcPtr DestroyWindow;

+  CopyWindowProcPtr CopyWindow;

+  PositionWindowProcPtr PositionWindow;

+};

+

+struct __GLXWinConfig

+{

+  __GLXconfig base;

+  int pixelFormatIndex;

+};

+

+/* ---------------------------------------------------------------------- */

+/*

+ * Various debug helpers

+ */

+

+#ifdef _DEBUG

+void GLWIN_DEBUG_HWND(HWND hwnd)

+{

+  if (glxWinDebugSettings.dumpHWND)

+  {

+    char buffer[1024];

+    RECT Rect;

+    HDC hDc=GetDC(hwnd);

+

+    if (GetWindowText(hwnd, buffer, sizeof(buffer))==0) *buffer=0;

+    GetWindowRect(hwnd,&Rect);

+

+    GLWIN_DEBUG_MSG("Got HWND %p (hdc %p) for window '%s' (%d,%d,%d,%d)", hwnd, hDc, buffer, Rect.left, Rect.top, Rect.right, Rect.bottom);

+    ReleaseDC(hwnd,hDc);

+  }

+}

+

+void GLWIN_HDC_DEBUG_MSG(const char *Message, HDC hDc, HWND hwnd)

+{

+    char buffer[1024];

+    RECT Rect;

+

+    if (GetWindowText(hwnd, buffer, sizeof(buffer))==0) *buffer=0;

+    GetWindowRect(hwnd,&Rect);

+

+    GLWIN_DEBUG_MSG("Got HDC %p (hwnd %p) for window '%s' (%d,%d,%d,%d)", hDc, hwnd, buffer, Rect.left, Rect.top, Rect.right, Rect.bottom);

+

+}

+

+glxWinDebugSettingsRec glxWinDebugSettings = { 0, 0, 0, 0, 0, 0};

+

+static void glxWinInitDebugSettings(void)

+{

+    char *envptr;

+

+    envptr = getenv("GLWIN_ENABLE_DEBUG");

+    if (envptr != NULL)

+        glxWinDebugSettings.enableDebug = (atoi(envptr) == 1);

+

+    envptr = getenv("GLWIN_ENABLE_TRACE");

+    if (envptr != NULL)

+        glxWinDebugSettings.enableTrace = (atoi(envptr) == 1);

+

+    envptr = getenv("GLWIN_DUMP_PFD");

+    if (envptr != NULL)

+        glxWinDebugSettings.dumpPFD = (atoi(envptr) == 1);

+

+    envptr = getenv("GLWIN_DUMP_HWND");

+    if (envptr != NULL)

+        glxWinDebugSettings.dumpHWND = (atoi(envptr) == 1);

+

+    envptr = getenv("GLWIN_DUMP_DC");

+    if (envptr != NULL)

+        glxWinDebugSettings.dumpDC = (atoi(envptr) == 1);

+

+    envptr = getenv("GLWIN_ENABLE_GLCALL_TRACE");

+    if (envptr != NULL)

+        glxWinDebugSettings.enableGLcallTrace = (atoi(envptr) == 1);

+

+    envptr = getenv("GLWIN_ENABLE_WGLCALL_TRACE");

+    if (envptr != NULL)

+        glxWinDebugSettings.enableWGLcallTrace = (atoi(envptr) == 1);

+

+    envptr = getenv("GLWIN_DEBUG_ALL");

+    if (envptr != NULL)

+      {

+        glxWinDebugSettings.enableDebug = 1;

+        glxWinDebugSettings.enableTrace = 1;

+        glxWinDebugSettings.dumpPFD = 1;

+        glxWinDebugSettings.dumpHWND = 1;

+        glxWinDebugSettings.dumpDC = 1;

+        glxWinDebugSettings.enableGLcallTrace = 1;

+        glxWinDebugSettings.enableWGLcallTrace = 1;

+      }

+}

+#endif

+

+static

+const char *glxWinErrorMessage(void)

+{

+  static char errorbuffer[1024];

+  DWORD Error=GetLastError();

+  int offset;

+  

+  sprintf(errorbuffer, "%p ",Error);

+  offset=strlen(errorbuffer);

+

+  if (!FormatMessage(

+                     FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,

+                     NULL,

+                     Error,

+                     MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),

+                     (LPTSTR) &errorbuffer[offset],

+                     sizeof(errorbuffer),

+                     NULL ))

+    {

+      snprintf(errorbuffer, sizeof(errorbuffer), "Unknown error in FormatMessage: %08x!", (unsigned)GetLastError());

+    }

+

+  if (errorbuffer[strlen(errorbuffer)-1] == '\n')

+    errorbuffer[strlen(errorbuffer)-1] = 0;

+

+  return errorbuffer;

+}

+

+static void pfdOut(const PIXELFORMATDESCRIPTOR *pfd);

+

+#ifdef _DEBUG

+

+#define DUMP_PFD_FLAG(flag) \

+    if (pfd->dwFlags & flag) { \

+        ErrorF("%s%s", pipesym, #flag); \

+        pipesym = " | "; \

+    }

+

+static void pfdOut(const PIXELFORMATDESCRIPTOR *pfd)

+{

+    const char *pipesym = ""; /* will be set after first flag dump */

+    ErrorF("PIXELFORMATDESCRIPTOR:\n");

+    ErrorF("nSize = %u\n", pfd->nSize);

+    ErrorF("nVersion = %u\n", pfd->nVersion);

+    ErrorF("dwFlags = %lu = {", pfd->dwFlags);

+        DUMP_PFD_FLAG(PFD_DOUBLEBUFFER);

+        DUMP_PFD_FLAG(PFD_STEREO);

+        DUMP_PFD_FLAG(PFD_DRAW_TO_WINDOW);

+        DUMP_PFD_FLAG(PFD_DRAW_TO_BITMAP);

+        DUMP_PFD_FLAG(PFD_SUPPORT_GDI);

+        DUMP_PFD_FLAG(PFD_SUPPORT_OPENGL);

+        DUMP_PFD_FLAG(PFD_GENERIC_FORMAT);

+        DUMP_PFD_FLAG(PFD_NEED_PALETTE);

+        DUMP_PFD_FLAG(PFD_NEED_SYSTEM_PALETTE);

+        DUMP_PFD_FLAG(PFD_SWAP_EXCHANGE);

+        DUMP_PFD_FLAG(PFD_SWAP_COPY);

+        DUMP_PFD_FLAG(PFD_SWAP_LAYER_BUFFERS);

+        DUMP_PFD_FLAG(PFD_GENERIC_ACCELERATED);

+        DUMP_PFD_FLAG(PFD_DEPTH_DONTCARE);

+        DUMP_PFD_FLAG(PFD_DOUBLEBUFFER_DONTCARE);

+        DUMP_PFD_FLAG(PFD_STEREO_DONTCARE);

+    ErrorF("}\n");

+

+    ErrorF("iPixelType = %hu = %s\n", pfd->iPixelType,

+            (pfd->iPixelType == PFD_TYPE_RGBA ? "PFD_TYPE_RGBA" : "PFD_TYPE_COLORINDEX"));

+    ErrorF("cColorBits = %hhu\n", pfd->cColorBits);

+    ErrorF("cRedBits = %hhu\n", pfd->cRedBits);

+    ErrorF("cRedShift = %hhu\n", pfd->cRedShift);

+    ErrorF("cGreenBits = %hhu\n", pfd->cGreenBits);

+    ErrorF("cGreenShift = %hhu\n", pfd->cGreenShift);

+    ErrorF("cBlueBits = %hhu\n", pfd->cBlueBits);

+    ErrorF("cBlueShift = %hhu\n", pfd->cBlueShift);

+    ErrorF("cAlphaBits = %hhu\n", pfd->cAlphaBits);

+    ErrorF("cAlphaShift = %hhu\n", pfd->cAlphaShift);

+    ErrorF("cAccumBits = %hhu\n", pfd->cAccumBits);

+    ErrorF("cAccumRedBits = %hhu\n", pfd->cAccumRedBits);

+    ErrorF("cAccumGreenBits = %hhu\n", pfd->cAccumGreenBits);

+    ErrorF("cAccumBlueBits = %hhu\n", pfd->cAccumBlueBits);

+    ErrorF("cAccumAlphaBits = %hhu\n", pfd->cAccumAlphaBits);

+    ErrorF("cDepthBits = %hhu\n", pfd->cDepthBits);

+    ErrorF("cStencilBits = %hhu\n", pfd->cStencilBits);

+    ErrorF("cAuxBuffers = %hhu\n", pfd->cAuxBuffers);

+    ErrorF("iLayerType = %hhu\n", pfd->iLayerType);

+    ErrorF("bReserved = %hhu\n", pfd->bReserved);

+    ErrorF("dwLayerMask = %lu\n", pfd->dwLayerMask);

+    ErrorF("dwVisibleMask = %lu\n", pfd->dwVisibleMask);

+    ErrorF("dwDamageMask = %lu\n", pfd->dwDamageMask);

+    ErrorF("\n");

+}

+

+static const char *

+visual_class_name(int cls)

+{

+  switch (cls) {

+  case GLX_STATIC_COLOR:

+    return "StaticColor";

+  case GLX_PSEUDO_COLOR:

+    return "PseudoColor";

+  case GLX_STATIC_GRAY:

+    return "StaticGray";

+  case GLX_GRAY_SCALE:

+    return "GrayScale";

+  case GLX_TRUE_COLOR:

+     return "TrueColor";

+  case GLX_DIRECT_COLOR:

+     return "DirectColor";

+  default:

+    return "-none-";

+  }

+}

+

+static const char *

+swap_method_name(int mthd)

+{

+  switch (mthd)

+    {

+    case GLX_SWAP_EXCHANGE_OML:

+      return "xchg";

+    case GLX_SWAP_COPY_OML:

+      return "copy";

+    case GLX_SWAP_UNDEFINED_OML:

+      return "    ";

+    default:

+      return "????";

+    }

+}

+

+static void

+fbConfigsDump(unsigned int n, __GLXconfig *c)

+{

+  ErrorF("%d fbConfigs\n", n);

+  ErrorF("pxf vis  fb                      render         Ste                     aux    accum        MS    drawable             Group/\n");

+  ErrorF("idx  ID  ID VisualType Depth Lvl RGB CI DB Swap reo  R  G  B  A   Z  S  buf AR AG AB AA  bufs num  W P Pb  Float Trans Caveat\n");

+  ErrorF("-----------------------------------------------------------------------------------------------------------------------------\n");

+

+  while (c != NULL)

+    {

+      unsigned int i = ((GLXWinConfig *)c)->pixelFormatIndex;

+

+      ErrorF("%3d  %2x  %2x "

+             "%-11s"

+             " %3d %3d   %s   %s  %s %s  %s  "

+             "%2d %2d %2d %2d  "

+             "%2d %2d  "

+             "%2d  "

+             "%2d %2d %2d %2d"

+             "   %2d   %2d"

+             "  %s %s %s "

+             "    %s   "

+             "  %s   "

+             "  %d %s"

+             "\n",

+             i, c->visualID, c->fbconfigID,

+             visual_class_name(c->visualType),

+             c->rgbBits ? c->rgbBits : c->indexBits,

+             c->level,

+	     (c->renderType & GLX_RGBA_BIT) ? "y" : ".",

+	     (c->renderType & GLX_COLOR_INDEX_BIT) ? "y" : ".",

+	     c->doubleBufferMode ? "y" : ".",

+             swap_method_name(c->swapMethod),

+	     c->stereoMode ? "y" : ".",

+             c->redBits, c->greenBits, c->blueBits, c->alphaBits,

+             c->depthBits, c->stencilBits,

+             c->numAuxBuffers,

+             c->accumRedBits, c->accumGreenBits, c->accumBlueBits, c->accumAlphaBits,

+             c->sampleBuffers, c->samples,

+             (c->drawableType & GLX_WINDOW_BIT) ? "y" : ".",

+             (c->drawableType & GLX_PIXMAP_BIT) ? "y" : ".",

+             (c->drawableType & GLX_PBUFFER_BIT) ? "y" : ".",

+             ".",

+             (c->transparentPixel != GLX_NONE_EXT) ? "y" : ".",

+             c->visualSelectGroup, (c->visualRating == GLX_SLOW_VISUAL_EXT) ? "*" : " ");

+

+      c = c->next;

+    }

+}

+#endif

+

+/* ---------------------------------------------------------------------- */

+/*

+ * Forward declarations

+ */

+

+static __GLXscreen *glxWinScreenProbe(ScreenPtr pScreen);

+static __GLXcontext *glxWinCreateContext(__GLXscreen *screen,

+                                        __GLXconfig *modes,

+                                        __GLXcontext *baseShareContext);

+static __GLXdrawable *glxWinCreateDrawable(ClientPtr client,

+                                          __GLXscreen *screen,

+                                          DrawablePtr pDraw,

+                                          XID drawId,

+                                          int type,

+                                          XID glxDrawId,

+                                          __GLXconfig *conf);

+

+static Bool glxWinRealizeWindow(WindowPtr pWin);

+static Bool glxWinUnrealizeWindow(WindowPtr pWin);

+static Bool glxWinDestroyWindow(WindowPtr pWin);

+static void glxWinCopyWindow(WindowPtr pWindow, DDXPointRec ptOldOrg, RegionPtr prgnSrc);

+static Bool glxWinPositionWindow(WindowPtr pWindow, int x, int y);

+

+static HDC glxWinMakeDC(__GLXWinContext *gc, __GLXWinDrawable *draw, HWND *hwnd);

+static void glxWinReleaseDC(HWND hwnd, HDC hdc, __GLXWinDrawable *draw);

+

+static void glxWinCreateConfigs(HDC dc, glxWinScreen *screen);

+static void glxWinCreateConfigsExt(HDC hdc, glxWinScreen *screen);

+static int fbConfigToPixelFormat(__GLXconfig *mode, PIXELFORMATDESCRIPTOR *pfdret, int drawableTypeOverride);

+static int fbConfigToPixelFormatIndex(HDC hdc, __GLXconfig *mode, int drawableTypeOverride, glxWinScreen *winScreen);

+

+/* ---------------------------------------------------------------------- */

+/*

+ * The GLX provider

+ */

+

+__GLXprovider __glXWGLProvider = {

+    glxWinScreenProbe,

+    "Win32 native WGL",

+    NULL

+};

+

+void

+glxWinPushNativeProvider(void)

+{

+  if (g_fNativeGl)

+    GlxPushProvider(&__glXWGLProvider);

+}

+

+/* ---------------------------------------------------------------------- */

+/*

+ * Screen functions

+ */

+

+static void

+glxWinScreenDestroy(__GLXscreen *screen)

+{

+    GLWIN_DEBUG_MSG("glxWinScreenDestroy(%p)", screen);

+    __glXScreenDestroy(screen);

+    free(screen);

+}

+

+static int

+glxWinScreenSwapInterval(__GLXdrawable *drawable, int interval)

+{

+  BOOL ret = wglSwapIntervalEXTWrapper(interval);

+  if (!ret)

+    {

+      ErrorF("wglSwapIntervalEXT interval %d failed:%s\n", interval, glxWinErrorMessage());

+    }

+  return ret;

+}

+

+static LRESULT CALLBACK GlxWindowProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)

+{

+  if (uMsg== WM_NCHITTEST)

+  {

+    return HTTRANSPARENT;

+  }

+  else

+    return DefWindowProc(hwnd, uMsg, wParam, lParam);

+}

+

+/*

+  Report the extensions split and formatted to avoid overflowing a line

+ */

+static void

+glxLogExtensions(const char *prefix, const char *extensions)

+{

+  int length = 0;

+  char *strl;

+  char *str = malloc(strlen(extensions) + 1);

+

+  if (str == NULL)

+    {

+      ErrorF("glxLogExtensions: xalloc error\n");

+      return;

+    }

+

+  str[strlen(extensions)] = '\0';

+  strncpy (str, extensions, strlen(extensions));

+

+  strl = strtok(str, " ");

+  winDebug("%s%s", prefix, strl);

+  length = strlen(prefix) + strlen(strl);

+

+  while (1)

+    {

+      strl = strtok(NULL, " ");

+      if (strl == NULL) break;

+

+      if (length + strlen(strl) + 1 > 120)

+        {

+          winDebug("\n");

+          winDebug("%s",prefix);

+          length = strlen(prefix);

+        }

+      else

+        {

+          winDebug(" ");

+          length++;

+        }

+

+      winDebug("%s", strl);

+      length = length + strlen(strl);

+    }

+

+  winDebug("\n");

+

+  free(str);

+}

+

+/* This is called by GlxExtensionInit() asking the GLX provider if it can handle the screen... */

+static __GLXscreen *

+glxWinScreenProbe(ScreenPtr pScreen)

+{

+    glxWinScreen *screen;

+    const char *gl_extensions;

+    const char *wgl_extensions;

+    HWND hwnd;

+    HDC hdc;

+    HGLRC hglrc;

+

+    GLWIN_DEBUG_MSG("glxWinScreenProbe");

+

+#ifdef _DEBUG

+    glxWinInitDebugSettings();

+#endif

+

+    if (pScreen == NULL)

+	return NULL;

+

+    if (!winCheckScreenAiglxIsSupported(pScreen))

+      {

+        LogMessage(X_ERROR,"AIGLX: No native OpenGL in modes with a root window\n");

+        return NULL;

+      }

+

+    screen = calloc(1, sizeof(glxWinScreen));

+

+    if (NULL == screen)

+	return NULL;

+

+    /* Wrap RealizeWindow, UnrealizeWindow and CopyWindow on this screen */

+    screen->RealizeWindow = pScreen->RealizeWindow;

+    pScreen->RealizeWindow = glxWinRealizeWindow;

+    screen->UnrealizeWindow = pScreen->UnrealizeWindow;

+    pScreen->UnrealizeWindow = glxWinUnrealizeWindow;

+    screen->CopyWindow = pScreen->CopyWindow;

+    pScreen->CopyWindow = glxWinCopyWindow;

+    screen->PositionWindow = pScreen->PositionWindow;

+    pScreen->PositionWindow = glxWinPositionWindow;

+    screen->DestroyWindow = pScreen->DestroyWindow;

+    pScreen->DestroyWindow = glxWinDestroyWindow;

+

+    /* Dump out some useful information about the native renderer */

+

+    // create window class

+    {

+      static wATOM glTestWndClass = 0;

+      if (glTestWndClass == 0)

+        {

+          WNDCLASSEX wc;

+          glTestWndClass=1;

+          wc.cbSize = sizeof(WNDCLASSEX);

+          wc.style = CS_OWNDC ;

+          wc.lpfnWndProc = GlxWindowProc;

+          wc.cbClsExtra = 0;

+          wc.cbWndExtra = 0;

+          wc.hInstance = GetModuleHandle(NULL);

+          wc.hIcon = 0;

+          wc.hCursor = 0;

+          wc.hbrBackground = 0;

+          wc.lpszMenuName = NULL;

+          wc.lpszClassName = WIN_GL_WINDOW_CLASS;

+          wc.hIconSm = 0;

+          RegisterClassEx (&wc);

+      }

+    }

+

+    // create an invisible window for a scratch DC

+    hwnd = CreateWindowExA(0,

+                           WIN_GL_WINDOW_CLASS,

+                           "XWin GL Renderer Capabilities Test Window",

+                           0, 0, 0, 0, 0, NULL, NULL, GetModuleHandle(NULL), NULL);

+    if (hwnd == NULL)

+      LogMessage(X_ERROR,"AIGLX: Couldn't create a window for render capabilities testing\n");

+

+    hdc = GetDC(hwnd);

+

+    // we must set a pixel format before we can create a context, just use the first one...

+    SetPixelFormat(hdc, 1, NULL);

+    hglrc = wglCreateContext(hdc);

+    wglMakeCurrent(hdc, hglrc);

+

+    // initialize wgl extension proc pointers (don't call them before here...)

+    // (but we need to have a current context for them to be resolvable)

+    wglResolveExtensionProcs();

+

+    winDebug("GL_VERSION:     %s\n", glGetStringWrapperNonstatic(GL_VERSION));

+    winDebug("GL_VENDOR:      %s\n", glGetStringWrapperNonstatic(GL_VENDOR));

+    winDebug("GL_RENDERER:    %s\n", glGetStringWrapperNonstatic(GL_RENDERER));

+    gl_extensions = (const char *)glGetStringWrapperNonstatic(GL_EXTENSIONS);

+    glxLogExtensions("GL_EXTENSIONS:  ", gl_extensions);

+    wgl_extensions = wglGetExtensionsStringARBWrapper(hdc);

+    if (!wgl_extensions) wgl_extensions = "";

+    glxLogExtensions("WGL_EXTENSIONS: ", wgl_extensions);

+

+    // Can you see the problem here?  The extensions string is DC specific

+    // Different DCs for windows on a multimonitor system driven by multiple cards

+    // might have completely different capabilities.  Of course, good luck getting

+    // those screens to be accelerated in XP and earlier...

+

+    {

+      // testing facility to not use any WGL extensions

+      char *envptr = getenv("GLWIN_NO_WGL_EXTENSIONS");

+      if ((envptr != NULL) && (atoi(envptr) != 0))

+        {

+          ErrorF("GLWIN_NO_WGL_EXTENSIONS is set, ignoring WGL_EXTENSIONS\n");

+          wgl_extensions = "";

+        }

+    }

+

+    {

+      Bool glx_sgi_make_current_read = FALSE;

+

+      //

+      // Based on the WGL extensions available, enable various GLX extensions

+      // XXX: make this table-driven ?

+      //

+      memset(screen->glx_enable_bits, 0, __GLX_EXT_BYTES);

+

+      __glXEnableExtension(screen->glx_enable_bits, "GLX_EXT_visual_info");

+      __glXEnableExtension(screen->glx_enable_bits, "GLX_EXT_visual_rating");

+      __glXEnableExtension(screen->glx_enable_bits, "GLX_EXT_import_context");

+      __glXEnableExtension(screen->glx_enable_bits, "GLX_OML_swap_method");

+      __glXEnableExtension(screen->glx_enable_bits, "GLX_SGIX_fbconfig");

+

+      if (strstr(wgl_extensions, "WGL_ARB_make_current_read"))

+        {

+          __glXEnableExtension(screen->glx_enable_bits, "GLX_SGI_make_current_read");

+          LogMessage(X_INFO, "AIGLX: enabled GLX_SGI_make_current_read\n");

+          glx_sgi_make_current_read = TRUE;

+        }

+

+      if (strstr(gl_extensions, "GL_WIN_swap_hint"))

+        {

+          __glXEnableExtension(screen->glx_enable_bits, "GLX_MESA_copy_sub_buffer");

+          LogMessage(X_INFO, "AIGLX: enabled GLX_MESA_copy_sub_buffer\n");

+        }

+

+      if (strstr(wgl_extensions, "WGL_EXT_swap_control"))

+        {

+          __glXEnableExtension(screen->glx_enable_bits, "GLX_SGI_swap_control");

+          __glXEnableExtension(screen->glx_enable_bits, "GLX_MESA_swap_control");

+          LogMessage(X_INFO, "AIGLX: enabled GLX_SGI_swap_control and GLX_MESA_swap_control\n");

+        }

+

+/*       // Hmm?  screen->texOffset */

+/*       if (strstr(wgl_extensions, "WGL_ARB_render_texture")) */

+/*         { */

+/*           __glXEnableExtension(screen->glx_enable_bits, "GLX_EXT_texture_from_pixmap"); */

+/*           LogMessage(X_INFO, "AIGLX: GLX_EXT_texture_from_pixmap backed by buffer objects\n"); */

+/*           screen->has_WGL_ARB_render_texture = TRUE; */

+/*         } */

+

+      if (strstr(wgl_extensions, "WGL_ARB_pbuffer"))

+        {

+          __glXEnableExtension(screen->glx_enable_bits, "GLX_SGIX_pbuffer");

+          LogMessage(X_INFO, "AIGLX: enabled GLX_SGIX_pbuffer\n");

+          screen->has_WGL_ARB_pbuffer = TRUE;

+        }

+

+      if (strstr(wgl_extensions, "WGL_ARB_multisample"))

+        {

+          __glXEnableExtension(screen->glx_enable_bits, "GLX_ARB_multisample");

+          __glXEnableExtension(screen->glx_enable_bits, "GLX_SGIS_multisample");

+          LogMessage(X_INFO, "AIGLX: enabled GLX_ARB_multisample and GLX_SGIS_multisample\n");

+          screen->has_WGL_ARB_multisample = TRUE;

+        }

+

+      screen->base.destroy = glxWinScreenDestroy;

+      screen->base.createContext = glxWinCreateContext;

+      screen->base.createDrawable = glxWinCreateDrawable;

+      screen->base.swapInterval = glxWinScreenSwapInterval;

+      screen->base.hyperpipeFuncs = NULL;

+      screen->base.swapBarrierFuncs = NULL;

+      screen->base.pScreen = pScreen;

+

+      if (strstr(wgl_extensions, "WGL_ARB_pixel_format"))

+        {

+          glxWinCreateConfigsExt(hdc, screen);

+          screen->has_WGL_ARB_pixel_format = TRUE;

+        }

+      else

+        {

+          glxWinCreateConfigs(hdc, screen);

+          screen->has_WGL_ARB_pixel_format = FALSE;

+        }

+      // Initializes screen->base.fbconfigs and screen->base.numFBConfigs

+

+      /* These will be set by __glXScreenInit */

+      screen->base.visuals = NULL;

+      screen->base.numVisuals = 0;

+

+      __glXScreenInit(&screen->base, pScreen);

+

+#ifdef _DEBUG

+      // dump out fbConfigs now fbConfigIds and visualIDs have been assigned

+      fbConfigsDump(screen->base.numFBConfigs, screen->base.fbconfigs);

+#endif

+

+      // Override the GL extensions string set by __glXScreenInit()

+      screen->base.GLextensions = xstrdup(gl_extensions);

+

+      // Generate the GLX extensions string (overrides that set by __glXScreenInit())

+      {

+        unsigned int buffer_size = __glXGetExtensionString(screen->glx_enable_bits, NULL);

+        if (buffer_size > 0)

+          {

+            if (screen->base.GLXextensions != NULL)

+              {

+                free(screen->base.GLXextensions);

+              }

+

+            screen->base.GLXextensions = xnfalloc(buffer_size);

+            __glXGetExtensionString(screen->glx_enable_bits, screen->base.GLXextensions);

+          }

+      }

+

+      //

+      // Override the GLX version (__glXScreenInit() sets it to "1.2")

+      // if we have all the needed extensionsto operate as a higher version

+      //

+      // SGIX_fbconfig && SGIX_pbuffer && SGI_make_current_read -> 1.3

+      // ARB_multisample -> 1.4

+      //

+      if (screen->has_WGL_ARB_pbuffer && glx_sgi_make_current_read)

+        {

+          free(screen->base.GLXversion);

+

+          if (screen->has_WGL_ARB_multisample)

+            {

+              screen->base.GLXversion = xstrdup("1.4");

+              screen->base.GLXmajor = 1;

+              screen->base.GLXminor = 4;

+            }

+          else

+            {

+              screen->base.GLXversion = xstrdup("1.3");

+              screen->base.GLXmajor = 1;

+              screen->base.GLXminor = 3;

+            }

+          LogMessage(X_INFO, "AIGLX: Set GLX version to %s\n", screen->base.GLXversion);

+        }

+    }

+

+    wglMakeCurrent(NULL, NULL);

+    wglDeleteContext(hglrc);

+    ReleaseDC(hwnd, hdc);

+    DestroyWindow(hwnd);

+

+    return &screen->base;

+}

+

+/* ---------------------------------------------------------------------- */

+/*

+ * Window functions

+ */

+

+static Bool

+glxWinRealizeWindow(WindowPtr pWin)

+{

+    Bool result;

+    ScreenPtr pScreen = pWin->drawable.pScreen;

+    glxWinScreen *screenPriv = (glxWinScreen *) glxGetScreen(pScreen);

+    winWindowPriv(pWin);

+

+    GLWIN_DEBUG_MSG("glxWinRealizeWindow");

+

+    /* Allow the window to be created (RootlessRealizeWindow is inside our wrap) */

+    pScreen->RealizeWindow = screenPriv->RealizeWindow;

+    result = pScreen->RealizeWindow(pWin);

+    pScreen->RealizeWindow = glxWinRealizeWindow;

+    

+    // Check if ze need to move the window\n

+    if (pWinPriv->GlCtxWnd && pWinPriv->hWnd)

+    {

+       ShowWindow(pWinPriv->hWnd,SW_SHOW);

+    }

+    return result;

+}

+

+

+static void

+glxWinCopyWindow(WindowPtr pWindow, DDXPointRec ptOldOrg, RegionPtr prgnSrc)

+{

+    __GLXWinDrawable *pGlxDraw;

+    ScreenPtr pScreen = pWindow->drawable.pScreen;

+    glxWinScreen *screenPriv = (glxWinScreen *) glxGetScreen(pScreen);

+

+    GLWIN_TRACE_MSG("glxWinCopyWindow pWindow %p", pWindow);

+

+    dixLookupResourceByType((pointer) &pGlxDraw, pWindow->drawable.id, __glXDrawableRes,

+				NullClient, DixUnknownAccess);

+

+

+    /*

+       Discard any CopyWindow requests if a GL drawing context is pointing at the window

+

+       For regions which are being drawn by GL, the shadow framebuffer doesn't have the

+       correct bits, so we wish to avoid shadow framebuffer damage occuring, which will

+       cause those incorrect bits to be transferred to the display....

+    */

+    if (pGlxDraw && pGlxDraw->drawContext)

+      {

+        GLWIN_DEBUG_MSG("glxWinCopyWindow: discarding");

+        return;

+      }

+

+    GLWIN_DEBUG_MSG("glxWinCopyWindow - passing to hw layer");

+

+    pScreen->CopyWindow = screenPriv->CopyWindow;

+    pScreen->CopyWindow(pWindow, ptOldOrg, prgnSrc);

+    pScreen->CopyWindow = glxWinCopyWindow;

+

+}

+

+static Bool

+glxWinPositionWindow(WindowPtr pWin, int x, int y)

+{

+    Bool result;

+    ScreenPtr pScreen = pWin->drawable.pScreen;

+    glxWinScreen *screenPriv = (glxWinScreen *) glxGetScreen(pScreen);

+    winWindowPriv(pWin);

+

+    pScreen->PositionWindow = screenPriv->PositionWindow;

+    result = pScreen->PositionWindow(pWin, x, y);

+    pScreen->PositionWindow = glxWinPositionWindow;

+

+    if (pWinPriv->GlCtxWnd && pWinPriv->hWnd)

+    {

+       MoveWindow(pWinPriv->hWnd,

+                  pWin->drawable.x,

+                  pWin->drawable.y,

+                  pWin->drawable.width,

+                  pWin->drawable.height,

+                  FALSE);

+    }

+    return result;

+}

+

+

+static Bool

+glxWinUnrealizeWindow(WindowPtr pWin)

+{

+    Bool result;

+    ScreenPtr pScreen = pWin->drawable.pScreen;

+    glxWinScreen *screenPriv = (glxWinScreen *)glxGetScreen(pScreen);

+    winWindowPriv(pWin);

+

+    GLWIN_DEBUG_MSG("glxWinUnrealizeWindow");

+

+    pScreen->UnrealizeWindow = screenPriv->UnrealizeWindow;

+    result = pScreen->UnrealizeWindow(pWin);

+    pScreen->UnrealizeWindow = glxWinUnrealizeWindow;

+

+    if (pWinPriv->GlCtxWnd && pWinPriv->hWnd)

+      ShowWindow(pWinPriv->hWnd,SW_HIDE);

+

+    return result;

+}

+

+static Bool

+glxWinDestroyWindow(WindowPtr pWin)

+{

+    Bool result;

+    ScreenPtr pScreen = pWin->drawable.pScreen;

+    glxWinScreen *screenPriv = (glxWinScreen *)glxGetScreen(pScreen);

+    winWindowPriv(pWin);

+

+    GLWIN_DEBUG_MSG("glxWinDestroyWindow");

+

+    if (pWinPriv->GlCtxWnd && pWinPriv->hWnd)

+    {

+      __GLXWinDrawable *pGlxDraw;

+

+      dixLookupResourceByType((pointer) &pGlxDraw, pWin->drawable.id, __glXDrawableRes, NullClient, DixUnknownAccess);

+

+      if (pGlxDraw && pGlxDraw->drawContext)

+      {

+        if (pGlxDraw->drawContext->hwnd!=pWinPriv->hWnd)

+          ErrorF("Wrong assumption\n");

+        glxWinReleaseDC(pGlxDraw->drawContext->hwnd, pGlxDraw->drawContext->hDC, pGlxDraw);

+        pGlxDraw->drawContext->hDC=NULL;

+        pGlxDraw->drawContext->hwnd=NULL;

+      }

+      DestroyWindow(pWinPriv->hWnd);

+      pWinPriv->hWnd=NULL;

+      pWinPriv->GlCtxWnd=0;

+    }

+

+    pScreen->DestroyWindow = screenPriv->DestroyWindow;

+    result = pScreen->DestroyWindow(pWin);

+    pScreen->DestroyWindow = glxWinDestroyWindow;

+

+    return result;

+}

+

+/* ---------------------------------------------------------------------- */

+/*

+ * Drawable functions

+ */

+

+static GLboolean

+glxWinDrawableSwapBuffers(ClientPtr client, __GLXdrawable *base)

+{

+    BOOL ret;

+    __GLXWinDrawable *draw = (__GLXWinDrawable *)base;

+

+    /* Swap buffers on the last active context for drawing on the drawable */

+    if (draw->drawContext == NULL)

+      {

+        GLWIN_TRACE_MSG("glxWinSwapBuffers - no context for drawable");

+        return GL_FALSE;

+      }

+

+    GLWIN_TRACE_MSG("glxWinSwapBuffers on drawable %p, last context %p (native ctx %p)", base, draw->drawContext, draw->drawContext->ctx);

+

+    /*

+       draw->drawContext->base.drawPriv will not be set if the context is not current anymore,

+       but if it is, it should point to this drawable....

+    */

+    assert((draw->drawContext->base.drawPriv == NULL) || (draw->drawContext->base.drawPriv == base));

+

+    ret = SwapBuffers(draw->drawContext->hDC);

+

+    if (!ret)

+      {

+        ErrorF("wglSwapBuffers failed: %s\n", glxWinErrorMessage());

+        return GL_FALSE;

+      }

+

+    return GL_TRUE;

+}

+

+static void

+glxWinDrawableCopySubBuffer(__GLXdrawable *drawable,

+                            int x, int y, int w, int h)

+{

+  glAddSwapHintRectWINWrapperNonstatic(x, y, w, h);

+  glxWinDrawableSwapBuffers(NULL, drawable);

+}

+

+static void

+glxWinDrawableDestroy(__GLXdrawable *base)

+{

+  __GLXWinDrawable *glxPriv = (__GLXWinDrawable *)base;

+

+  if (glxPriv->drawContext && (__glXLastContext == &((glxPriv->drawContext)->base)))

+    {

+      // if this context is current and has unflushed commands, say we have flushed them

+      // (don't actually flush them, the window is going away anyhow, and an implict flush occurs

+      // on the next context change)

+      // (GLX core considers it an error when we try to select a new current context if the old one

+      // has unflushed commands, but the window has disappeared..)

+      __GLX_NOTE_FLUSHED_CMDS(__glXLastContext);

+      __glXLastContext = NULL;

+    }

+

+  if (glxPriv->hPbuffer)

+    if (!wglDestroyPbufferARBWrapper(glxPriv->hPbuffer))

+      {

+        ErrorF("wglDestroyPbufferARB failed: %s\n", glxWinErrorMessage());

+      }

+

+  if (glxPriv->dibDC)

+    {

+      // restore the default DIB

+      SelectObject(glxPriv->dibDC, glxPriv->hOldDIB);

+

+      if (!DeleteDC(glxPriv->dibDC))

+        {

+          ErrorF("DeleteDC failed: %s\n", glxWinErrorMessage());

+        }

+    }

+

+  if (glxPriv->hDIB)

+    {

+      if (!DeleteObject(glxPriv->hDIB))

+        {

+          ErrorF("DeleteObject failed: %s\n", glxWinErrorMessage());

+        }

+

+      ((PixmapPtr)glxPriv->base.pDraw)->devPrivate.ptr = glxPriv->pOldBits;

+    }

+

+  GLWIN_DEBUG_MSG("glxWinDestroyDrawable");

+  free(glxPriv);

+}

+

+static __GLXdrawable *

+glxWinCreateDrawable(ClientPtr client,

+			     __GLXscreen *screen,

+			     DrawablePtr pDraw,

+			     XID drawId,

+			     int type,

+			     XID glxDrawId,

+			     __GLXconfig *conf)

+{

+  __GLXWinDrawable *glxPriv;

+

+  glxPriv = calloc(1,sizeof(*glxPriv));

+

+  if (glxPriv == NULL)

+      return NULL;

+

+  if(!__glXDrawableInit(&glxPriv->base, screen, pDraw, type, glxDrawId, conf)) {

+    free(glxPriv);

+    return NULL;

+  }

+

+  glxPriv->base.destroy       = glxWinDrawableDestroy;

+  glxPriv->base.swapBuffers   = glxWinDrawableSwapBuffers;

+  glxPriv->base.copySubBuffer = glxWinDrawableCopySubBuffer;

+  // glxPriv->base.waitX  what are these for?

+  // glxPriv->base.waitGL

+

+  GLWIN_DEBUG_MSG("glxWinCreateDrawable %p", glxPriv);

+

+  return &glxPriv->base;

+}

+

+/* ---------------------------------------------------------------------- */

+/*

+ * Texture functions

+ */

+

+static

+int glxWinBindTexImage(__GLXcontext  *baseContext,

+                      int            buffer,

+                      __GLXdrawable *pixmap)

+{

+  ErrorF("glxWinBindTexImage: not implemented\n");

+  return FALSE;

+}

+

+static

+int glxWinReleaseTexImage(__GLXcontext  *baseContext,

+                         int            buffer,

+                         __GLXdrawable *pixmap)

+{

+  ErrorF(" glxWinReleaseTexImage: not implemented\n");

+  return FALSE;

+}

+

+/* ---------------------------------------------------------------------- */

+/*

+ * Lazy update context implementation

+ *

+ * WGL contexts are created for a specific HDC, so we cannot create the WGL

+ * context in glxWinCreateContext(), we must defer creation until the context

+ * is actually used on a specifc drawable which is connected to a native window,

+ * pbuffer or DIB

+ *

+ * The WGL context may be used on other, compatible HDCs, so we don't need to

+ * recreate it for every new native window

+ *

+ * XXX: I wonder why we can't create the WGL context on the screen HDC ?

+ * Basically we assume all HDCs are compatible at the moment: if they are not

+ * we are in a muddle, there was some code in the old implementation to attempt

+ * to transparently migrate a context to a new DC by copying state and sharing

+ * lists with the old one...

+ */

+

+static void

+glxWinSetPixelFormat(__GLXWinContext *gc, HDC hdc, int bppOverride, int drawableTypeOverride)

+{

+  __GLXscreen *screen = gc->base.pGlxScreen;

+  glxWinScreen *winScreen = (glxWinScreen *)screen;

+

+  __GLXconfig *config = gc->base.config;

+  GLXWinConfig *winConfig = (GLXWinConfig *)config;

+  

+  GLWIN_DEBUG_MSG("glxWinSetPixelFormat: pixelFormatIndex %d", winConfig->pixelFormatIndex);

+

+  /*

+    Normally, we can just use the the pixelFormatIndex corresponding

+    to the fbconfig which has been specified by the client

+  */

+

+  if (!((bppOverride && (bppOverride != (config->redBits + config->greenBits + config->blueBits) ))

+        || ((config->drawableType & drawableTypeOverride) == 0)))

+    {

+      if (!SetPixelFormat(hdc, winConfig->pixelFormatIndex, NULL))

+        {

+          ErrorF("SetPixelFormat error: %s\n", glxWinErrorMessage());

+          return;

+        }

+

+      return;

+    }

+

+  /*

+    However, in certain special cases this pixel format will be incompatible with the

+    use we are going to put it to, so we need to re-evaluate the pixel format to use:

+

+    1) When PFD_DRAW_TO_BITMAP is set, ChoosePixelFormat() always returns a format with

+       the cColorBits we asked for, so we need to ensure it matches the bpp of the bitmap

+

+    2) Applications may assume that visuals selected with glXChooseVisual() work with

+       pixmap drawables (there is no attribute to explicitly query for pixmap drawable

+       support as there is for glXChooseFBConfig())

+       (it's arguable this is an error in the application, but we try to make it work)

+

+       pixmap rendering is always slow for us, so we don't want to choose those visuals

+       by default, but if the actual drawable type we're trying to select the context

+       on (drawableTypeOverride) isn't supported by the selected fbConfig, reconsider

+       and see if we can find a suitable one...

+   */

+  ErrorF("glxWinSetPixelFormat: having second thoughts: cColorbits %d, bppOveride %d; config->drawableType %d, drawableTypeOverride %d\n",

+         (config->redBits + config->greenBits + config->blueBits), bppOverride, config->drawableType, drawableTypeOverride);

+

+  if (!winScreen->has_WGL_ARB_pixel_format)

+    {

+      PIXELFORMATDESCRIPTOR pfd;

+      int pixelFormat;

+      

+      /* convert fbConfig to PFD */

+      if (fbConfigToPixelFormat(gc->base.config, &pfd, drawableTypeOverride))

+        {

+          ErrorF("glxWinSetPixelFormat: fbConfigToPixelFormat failed\n");

+          return;

+        }

+

+#ifdef _DEBUG

+        if (glxWinDebugSettings.dumpPFD)

+        pfdOut(&pfd);

+#endif

+

+      if (bppOverride)

+        {

+          GLWIN_DEBUG_MSG("glxWinSetPixelFormat: Forcing bpp from %d to %d\n", pfd.cColorBits, bppOverride);

+          pfd.cColorBits = bppOverride;

+        }

+

+      pixelFormat = ChoosePixelFormat(hdc, &pfd);

+      if (pixelFormat == 0)

+        {

+          ErrorF("ChoosePixelFormat error: %s\n", glxWinErrorMessage());

+          return;

+        }

+

+      GLWIN_DEBUG_MSG("ChoosePixelFormat: chose pixelFormatIndex %d", pixelFormat);

+      ErrorF("ChoosePixelFormat: chose pixelFormatIndex %d (rather than %d as originally planned)\n", pixelFormat, winConfig->pixelFormatIndex);

+

+      if (!SetPixelFormat(hdc, pixelFormat, &pfd))

+        {

+          ErrorF("SetPixelFormat error: %s\n", glxWinErrorMessage());

+          return;

+        }

+    }

+  else

+    {

+      int pixelFormat = fbConfigToPixelFormatIndex(hdc, gc->base.config, drawableTypeOverride, winScreen);

+      if (pixelFormat == 0)

+        {

+          ErrorF("wglChoosePixelFormat error: %s\n", glxWinErrorMessage());

+          return;

+        }

+

+      GLWIN_DEBUG_MSG("wglChoosePixelFormat: chose pixelFormatIndex %d", pixelFormat);

+      ErrorF("wglChoosePixelFormat: chose pixelFormatIndex %d (rather than %d as originally planned)\n", pixelFormat, winConfig->pixelFormatIndex);

+

+      if (!SetPixelFormat(hdc, pixelFormat, NULL))

+        {

+          ErrorF("SetPixelFormat error: %s\n", glxWinErrorMessage());

+          return;

+        }

+    }

+}

+

+static HDC

+glxWinMakeDC(__GLXWinContext *gc, __GLXWinDrawable *draw, HWND *hwnd)

+{

+  HDC hdc = NULL;

+  *hwnd = NULL;

+

+  if (draw == NULL)

+    {

+      GLWIN_TRACE_MSG("No drawable for context %p (native ctx %p)", gc, gc->ctx);

+      return NULL;

+    }

+

+  switch (draw->base.type)

+  {

+    case GLX_DRAWABLE_WINDOW:

+    {

+      WindowPtr pWin;

+

+      pWin = (WindowPtr) draw->base.pDraw;

+      if (pWin == NULL)

+        {

+          GLWIN_TRACE_MSG("for drawable %p, no WindowPtr", pWin);

+          return NULL;

+        }

+

+      *hwnd = winGetWindowInfo(pWin);

+

+      if (*hwnd == NULL)

+        {

+          ErrorF("No HWND error: %s\n", glxWinErrorMessage());

+          return NULL;

+        }

+

+      hdc = GetDC(*hwnd);

+

+      if (hdc == NULL)

+        ErrorF("GetDC error: %s: hwnd %x, gc %p, gc->ctx %p ,gc->hwnd %p\n", glxWinErrorMessage(), *hwnd, gc, gc->ctx, gc->hwnd);

+

+      if (gc->hDC)

+      {

+        glxWinReleaseDC(gc->hwnd, gc->hDC, draw);

+        gc->hDC=NULL;

+      }

+#ifdef _DEBUG

+      if (glxWinDebugSettings.enableTrace)

+            GLWIN_DEBUG_HWND(*hwnd);

+

+          GLWIN_TRACE_MSG("for context %p (native ctx %p), hWnd changed from %p to %p", gc, gc->ctx, gc->hwnd, *hwnd);

+#endif

+      gc->hwnd = *hwnd;

+      

+      /* Check if we need to set the pixelformat */

+      {

+        winWindowPriv(pWin);

+        if (!pWinPriv->PixelFormatSet)

+        {

+          pWinPriv->PixelFormatSet=TRUE;

+          /* We must select a pixelformat, but SetPixelFormat can only be called once for a window... */

+          glxWinSetPixelFormat(gc, hdc, 0, GLX_WINDOW_BIT);

+        }

+      }

+    }

+    break;

+

+  case GLX_DRAWABLE_PBUFFER:

+    {

+      hdc = wglGetPbufferDCARBWrapper(draw->hPbuffer);

+

+      if (hdc == NULL)

+        ErrorF("GetDC (pbuffer) error: %s\n", glxWinErrorMessage());

+    }

+    break;

+

+  case GLX_DRAWABLE_PIXMAP:

+    {

+      hdc = draw->dibDC;

+#ifdef _DEBUG

+      if (glxWinDebugSettings.dumpDC)

+        GLWIN_DEBUG_MSG("Got PIXMAP HDC %p for window %p", hdc, *hwnd);

+#endif

+    }

+    break;

+

+  default:

+    {

+      ErrorF("glxWinMakeDC: tried to makeDC for unhandled drawable type %d\n", draw->base.type);

+    }

+  }

+

+#ifdef _DEBUG

+  if (glxWinDebugSettings.dumpDC)

+    GLWIN_HDC_DEBUG_MSG("Got HDC %p for window %p", hdc, *hwnd);

+#endif

+

+  return hdc;

+}

+

+static void

+glxWinReleaseDC(HWND hwnd, HDC hdc,__GLXWinDrawable *draw)

+{

+  switch (draw->base.type)

+  {

+    case GLX_DRAWABLE_WINDOW:

+    {

+      ReleaseDC(hwnd, hdc);

+    }

+    break;

+

+  case GLX_DRAWABLE_PBUFFER:

+    {

+      if (!wglReleasePbufferDCARBWrapper(draw->hPbuffer, hdc))

+        {

+          ErrorF("wglReleasePbufferDCARB error: %s\n", glxWinErrorMessage());

+        }

+    }

+    break;

+

+  case GLX_DRAWABLE_PIXMAP:

+    {

+      // don't release DC, the memory DC lives as long as the bitmap

+

+      // We must ensure that all GDI drawing into the bitmap has completed

+      // in case we subsequently access the bits from it

+      GdiFlush();

+    }

+    break;

+

+  default:

+    {

+      ErrorF("glxWinReleaseDC: tried to releaseDC for unhandled drawable type %d\n", draw->base.type);

+    }

+  }

+}

+

+static void

+glxWinDeferredCreateContext(__GLXWinContext *gc, __GLXWinDrawable *draw)

+{

+  HWND hwnd;

+  GLWIN_DEBUG_MSG("glxWinDeferredCreateContext: attach context %p to drawable %p", gc, draw);

+

+  switch (draw->base.type)

+  {

+    case GLX_DRAWABLE_WINDOW:

+    {

+      WindowPtr pWin = (WindowPtr) draw->base.pDraw;

+

+      if (!(gc->base.config->drawableType & GLX_WINDOW_BIT))

+        {

+          ErrorF("glxWinDeferredCreateContext: tried to attach a context whose fbConfig doesn't have drawableType GLX_WINDOW_BIT to a GLX_DRAWABLE_WINDOW drawable\n");

+        }

+

+      if (pWin == NULL)

+        {

+          GLWIN_DEBUG_MSG("Deferring until X window is created");

+          return;

+        }

+

+      GLWIN_DEBUG_MSG("glxWinDeferredCreateContext: pWin %p", pWin);

+

+      if (winGetWindowInfo(pWin) == NULL)

+        {

+          GLWIN_DEBUG_MSG("Deferring until native window is created");

+          return;

+        }

+    }

+    break;

+

+    case GLX_DRAWABLE_PBUFFER:

+    {

+      if (draw->hPbuffer == NULL)

+        {

+          __GLXscreen *screen;

+          glxWinScreen *winScreen;

+          int pixelFormat;

+          // XXX: which DC are supposed to use???

+          HDC screenDC = GetDC(NULL);

+

+          if (!(gc->base.config->drawableType & GLX_PBUFFER_BIT))

+            {

+              ErrorF("glxWinDeferredCreateContext: tried to attach a context whose fbConfig doesn't have drawableType GLX_PBUFFER_BIT to a GLX_DRAWABLE_PBUFFER drawable\n");

+            }

+

+          screen = gc->base.pGlxScreen;

+          winScreen = (glxWinScreen *)screen;

+

+          pixelFormat = fbConfigToPixelFormatIndex(screenDC, gc->base.config, GLX_DRAWABLE_PBUFFER, winScreen);

+          if (pixelFormat == 0)

+            {

+              ErrorF("wglChoosePixelFormat error: %s\n", glxWinErrorMessage());

+              return;

+            }

+

+          draw->hPbuffer = wglCreatePbufferARBWrapper(screenDC, pixelFormat, draw->base.pDraw->width, draw->base.pDraw->height, NULL);

+          ReleaseDC(NULL, screenDC);

+

+          if (draw->hPbuffer == NULL)

+            {

+              ErrorF("wglCreatePbufferARBWrapper error: %s\n", glxWinErrorMessage());

+              return;

+            }

+

+          GLWIN_DEBUG_MSG("glxWinDeferredCreateContext: pBuffer %p created for drawable %p", draw->hPbuffer, draw);

+        }

+    }

+    break;

+

+    case GLX_DRAWABLE_PIXMAP:

+    {

+      if (draw->dibDC == NULL)

+        {

+          BITMAPINFOHEADER bmpHeader;

+          void *pBits;

+

+          memset (&bmpHeader, 0, sizeof(BITMAPINFOHEADER));

+          bmpHeader.biSize = sizeof(BITMAPINFOHEADER);

+          bmpHeader.biWidth = draw->base.pDraw->width;

+          bmpHeader.biHeight = draw->base.pDraw->height;

+          bmpHeader.biPlanes = 1;

+          bmpHeader.biBitCount = draw->base.pDraw->bitsPerPixel;

+          bmpHeader.biCompression = BI_RGB;

+

+          if (!(gc->base.config->drawableType & GLX_PIXMAP_BIT))

+            {

+              ErrorF("glxWinDeferredCreateContext: tried to attach a context whose fbConfig doesn't have drawableType GLX_PIXMAP_BIT to a GLX_DRAWABLE_PIXMAP drawable\n");

+            }

+

+          draw->dibDC = CreateCompatibleDC(NULL);

+          if (draw->dibDC == NULL)

+            {

+              ErrorF("CreateCompatibleDC error: %s\n", glxWinErrorMessage());

+              return;

+            }

+

+          draw->hDIB = CreateDIBSection(draw->dibDC, (BITMAPINFO *)&bmpHeader, DIB_RGB_COLORS, &pBits, 0, 0);

+          if (draw->dibDC == NULL)

+            {

+              ErrorF("CreateDIBSection error: %s\n", glxWinErrorMessage());

+              return;

+            }

+

+          // XXX: CreateDIBSection insists on allocating the bitmap memory for us, so we're going to

+          // need some jiggery pokery to point the underlying X Drawable's bitmap at the same set of bits

+          // so that they can be read with XGetImage as well as glReadPixels, assuming the formats are

+          // even compatible ...

+          draw->pOldBits = ((PixmapPtr)draw->base.pDraw)->devPrivate.ptr;

+          ((PixmapPtr)draw->base.pDraw)->devPrivate.ptr = pBits;

+

+          // Select the DIB into the DC

+          draw->hOldDIB = SelectObject(draw->dibDC, draw->hDIB);

+          if (!draw->hOldDIB)

+            {

+              ErrorF("SelectObject error: %s\n", glxWinErrorMessage());

+            }

+

+          // Set the pixel format of the bitmap

+          glxWinSetPixelFormat(gc, draw->dibDC, draw->base.pDraw->bitsPerPixel, GLX_PIXMAP_BIT);

+

+          GLWIN_DEBUG_MSG("glxWinDeferredCreateContext: DIB bitmap %p created for drawable %p", draw->hDIB, draw);

+        }

+    }

+    break;

+

+    default:

+    {

+      ErrorF("glxWinDeferredCreateContext: tried to attach unhandled drawable type %d\n", draw->base.type);

+      return;

+    }

+  }

+

+  gc->hDC = glxWinMakeDC(gc, draw, &hwnd);

+  gc->ctx = wglCreateContext(gc->hDC);

+

+  if (gc->ctx == NULL)

+    {

+      glxWinReleaseDC(hwnd, gc->hDC, draw);

+      gc->hDC=0;

+      

+      ErrorF("wglCreateContext error: %s\n", glxWinErrorMessage());

+      return;

+    }

+

+  GLWIN_DEBUG_MSG("glxWinDeferredCreateContext: attached context %p to native context %p drawable %p", gc, gc->ctx, draw);

+

+  // if the native context was created successfully, shareLists if needed

+  if (gc->ctx && gc->shareContext)

+    {

+      GLWIN_DEBUG_MSG("glxWinCreateContextReal shareLists with context %p (native ctx %p)", gc->shareContext, gc->shareContext->ctx);

+

+      if (!wglShareLists(gc->shareContext->ctx, gc->ctx))

+        {

+          ErrorF("wglShareLists error: %s\n", glxWinErrorMessage());

+        }

+    }

+}

+

+/* ---------------------------------------------------------------------- */

+/*

+ * Context functions

+ */

+

+

+/* Context manipulation routines should return TRUE on success, FALSE on failure */

+static int

+glxWinContextMakeCurrent(__GLXcontext *base)

+{

+  __GLXWinContext *gc = (__GLXWinContext *)base;

+  BOOL ret;

+  __GLXWinDrawable *drawPriv;

+

+#ifdef _DEBUG

+  GLWIN_TRACE_MSG("glxWinContextMakeCurrent context %p (native ctx %p)", gc, gc->ctx);

+  glWinCallDelta();

+#endif

+

+  /* Keep a note of the last active context in the drawable */

+  drawPriv = (__GLXWinDrawable *)gc->base.drawPriv;

+  drawPriv->drawContext = gc;

+

+  if (gc->ctx == NULL)

+    {

+      glxWinDeferredCreateContext(gc, drawPriv);

+    }

+

+  if (gc->ctx == NULL)

+    {

+      ErrorF("glxWinContextMakeCurrent: Native context is NULL\n");

+      return FALSE;

+    }

+

+  if ((gc->base.readPriv != NULL) && (gc->base.readPriv != gc->base.drawPriv))

+    {

+      // XXX: should only occur with WGL_ARB_make_current_read

+      /*

+        If there is a separate read drawable, create a separate read DC, and

+        use the wglMakeContextCurrent extension to make the context current drawing

+        to one DC and reading from the other

+      */

+      gc->hreadDC = glxWinMakeDC(gc, (__GLXWinDrawable *)gc->base.readPriv, &gc->hreadwnd);

+      if (gc->hreadDC == NULL)

+        {

+          ErrorF("glxWinMakeDC failed for readDC\n");

+          return FALSE;

+        }

+

+      ret = wglMakeContextCurrentARBWrapper(gc->hDC, gc->hreadDC, gc->ctx);

+      if (!ret)

+        {

+          ErrorF("wglMakeContextCurrentARBWrapper error: %s\n", glxWinErrorMessage());

+        }

+    }

+  else

+    {

+      /* Otherwise, just use wglMakeCurrent */

+      if (!gc->hDC)

+      {

+        /* It probably has been release by loseCurrent, so create it again */

+        gc->hDC = glxWinMakeDC(gc, drawPriv, &gc->hwnd);

+      }

+      ret = wglMakeCurrent(gc->hDC, gc->ctx);

+      if (!ret)

+        {

+          DWORD ErrorCode=GetLastError();

+          ErrorF("wglMakeCurrent error: %x dc %p ctx %p\n", ErrorCode,gc->hDC,gc->ctx);

+          if (!ErrorCode)

+          {

+            ErrorF("Error code was 0, assuming no error.\n");

+            ret=TRUE;

+          }

+        }

+    }

+

+  // apparently make current could fail if the context is current in a different thread,

+  // but that shouldn't be able to happen in the current server...

+

+  return ret;

+}

+

+static int

+glxWinContextLoseCurrent(__GLXcontext *base)

+{

+  BOOL ret=TRUE;

+  __GLXWinContext *gc = (__GLXWinContext *)base;

+

+#ifdef _DEBUG

+  GLWIN_TRACE_MSG("glxWinContextLoseCurrent context %p (native ctx %p)", gc, gc->ctx);

+  glWinCallDelta();

+#endif

+

+

+  if (wglGetCurrentContext()==gc->ctx)

+  {

+    /* Only do this when we are sure we are currently the active, otherwise we are deactivating the wrong one (this is happening!!!) */

+    ret = wglMakeCurrent(NULL, NULL);

+    if (!ret)

+      ErrorF("glxWinContextLoseCurrent error: %s\n", glxWinErrorMessage());

+  }

+  else

+  {

+    return FALSE;

+  }

+

+  /* Since drawPriv is going to be set to zero in the context, we have to release the DC to */

+  if (gc->hDC && gc->base.drawPriv) glxWinReleaseDC(gc->hwnd, gc->hDC, (__GLXWinDrawable *)gc->base.drawPriv);

+  if (gc->hreadDC && gc->base.readPriv) glxWinReleaseDC(gc->hreadwnd, gc->hreadDC, (__GLXWinDrawable *)gc->base.readPriv);

+  gc->hDC=NULL;

+  gc->hreadDC=NULL;

+  

+  base->isCurrent=FALSE;  /* It looks like glx is not doing this */

+

+  return ret;

+}

+

+static int

+glxWinContextCopy(__GLXcontext *dst_base, __GLXcontext *src_base, unsigned long mask)

+{

+  __GLXWinContext *dst = (__GLXWinContext *)dst_base;

+  __GLXWinContext *src = (__GLXWinContext *)src_base;

+  BOOL ret;

+

+  GLWIN_DEBUG_MSG("glxWinContextCopy");

+

+  ret = wglCopyContext(src->ctx, dst->ctx, mask);

+  if (!ret)

+    {

+      ErrorF("wglCopyContext error: %s\n", glxWinErrorMessage());

+    }

+

+  return ret;

+}

+

+static int

+glxWinContextForceCurrent(__GLXcontext *base)

+{

+  /* wglMakeCurrent always flushes the previous context, so this is equivalent to glxWinContextMakeCurrent */

+  return glxWinContextMakeCurrent(base);

+}

+

+static void

+glxWinContextDestroy(__GLXcontext *base)

+{

+  __GLXWinContext *gc = (__GLXWinContext *)base;

+

+  if (gc != NULL)

+    {

+      GLWIN_DEBUG_MSG("GLXcontext %p destroyed (native ctx %p)", base, gc->ctx);

+

+      if (gc->ctx)

+        {

+          BOOL ret;

+          /* It's bad style to delete the context while it's still current */

+          if (wglGetCurrentContext() == gc->ctx)

+            {

+              wglMakeCurrent(NULL, NULL);

+            }

+

+          ret = wglDeleteContext(gc->ctx);

+          if (!ret)

+            ErrorF("wglDeleteContext error: %s\n", glxWinErrorMessage());

+          if (gc->base.drawPriv && gc->hDC) glxWinReleaseDC(gc->hwnd, gc->hDC, (__GLXWinDrawable *)gc->base.drawPriv);

+          if (gc->base.readPriv && gc->hreadDC) glxWinReleaseDC(gc->hreadwnd, gc->hreadDC, (__GLXWinDrawable *)gc->base.readPriv);

+          gc->hDC=NULL;

+          gc->hreadDC=NULL;

+          gc->ctx = NULL;

+        }

+

+      free(gc);

+    }

+}

+

+static __GLXcontext *

+glxWinCreateContext(__GLXscreen *screen,

+                   __GLXconfig *modes,

+                   __GLXcontext *baseShareContext)

+{

+    __GLXWinContext *context;

+    __GLXWinContext *shareContext = (__GLXWinContext *)baseShareContext;

+

+    static __GLXtextureFromPixmap glxWinTextureFromPixmap =

+      {

+        glxWinBindTexImage,

+        glxWinReleaseTexImage

+      };

+

+    context = (__GLXWinContext *)calloc(1, sizeof(__GLXWinContext));

+

+    if (!context)

+        return NULL;

+

+    memset(context, 0, sizeof *context);

+    context->base.destroy        = glxWinContextDestroy;

+    context->base.makeCurrent    = glxWinContextMakeCurrent;

+    context->base.loseCurrent    = glxWinContextLoseCurrent;

+    context->base.copy           = glxWinContextCopy;

+    context->base.forceCurrent   = glxWinContextForceCurrent;

+    context->base.textureFromPixmap = &glxWinTextureFromPixmap;

+    context->base.config = modes;

+    context->base.pGlxScreen = screen;

+

+    // actual native GL context creation is deferred until attach()

+    //context->ctx = NULL; already done with memset

+    context->shareContext = shareContext;

+

+    glWinSetupDispatchTable();

+

+    GLWIN_DEBUG_MSG("GLXcontext %p created", context);

+

+    return &(context->base);

+}

+

+/* ---------------------------------------------------------------------- */

+/*

+ * Utility functions

+ */

+

+static int

+fbConfigToPixelFormat(__GLXconfig *mode, PIXELFORMATDESCRIPTOR *pfdret, int drawableTypeOverride)

+{

+    PIXELFORMATDESCRIPTOR pfd = {

+      sizeof(PIXELFORMATDESCRIPTOR),   /* size of this pfd */

+      1,                     /* version number */

+      PFD_SUPPORT_OPENGL,    /* support OpenGL */

+      PFD_TYPE_RGBA,         /* RGBA type */

+      24,                    /* 24-bit color depth */

+      0, 0, 0, 0, 0, 0,      /* color bits ignored */

+      0,                     /* no alpha buffer */

+      0,                     /* shift bit ignored */

+      0,                     /* no accumulation buffer */

+      0, 0, 0, 0,            /* accum bits ignored */

+      32,                    /* 32-bit z-buffer */

+      0,                     /* no stencil buffer */

+      0,                     /* no auxiliary buffer */

+      PFD_MAIN_PLANE,        /* main layer */

+      0,                     /* reserved */

+      0, 0, 0                /* layer masks ignored */

+    };

+

+    if ((mode->drawableType | drawableTypeOverride) & GLX_WINDOW_BIT)

+      pfd.dwFlags |= PFD_DRAW_TO_WINDOW; /* support window */

+

+    if ((mode->drawableType | drawableTypeOverride) & GLX_PIXMAP_BIT)

+      pfd.dwFlags |= (PFD_DRAW_TO_BITMAP | PFD_SUPPORT_GDI); /* supports software rendering to bitmap */

+

+    if (mode->stereoMode) {

+        pfd.dwFlags |= PFD_STEREO;

+    }

+    if (mode->doubleBufferMode) {

+        pfd.dwFlags |= PFD_DOUBLEBUFFER;

+    }

+

+    pfd.iPixelType = PFD_TYPE_RGBA;

+    pfd.cColorBits = mode->redBits + mode->greenBits + mode->blueBits;

+    pfd.cRedBits = mode->redBits;

+    pfd.cRedShift = 0; /* FIXME */

+    pfd.cGreenBits = mode->greenBits;

+    pfd.cGreenShift = 0; /* FIXME  */

+    pfd.cBlueBits = mode->blueBits;

+    pfd.cBlueShift = 0; /* FIXME */

+    pfd.cAlphaBits = mode->alphaBits;

+    pfd.cAlphaShift = 0; /* FIXME */

+

+    pfd.cAccumBits = mode->accumRedBits + mode->accumGreenBits + mode->accumBlueBits + mode->accumAlphaBits;

+    pfd.cAccumRedBits = mode->accumRedBits;

+    pfd.cAccumGreenBits = mode->accumGreenBits;

+    pfd.cAccumBlueBits = mode->accumBlueBits;

+    pfd.cAccumAlphaBits = mode->accumAlphaBits;

+

+    pfd.cDepthBits = mode->depthBits;

+    pfd.cStencilBits = mode->stencilBits;

+    pfd.cAuxBuffers = mode->numAuxBuffers;

+

+    /* mode->level ? */

+    /* mode->pixmapMode ? */

+

+    *pfdret = pfd;

+

+    return 0;

+}

+

+#define SET_ATTR_VALUE(attr, value) { attribList[i++] = attr; attribList[i++] = value; assert(i < NUM_ELEMENTS(attribList)); }

+

+static int

+fbConfigToPixelFormatIndex(HDC hdc, __GLXconfig *mode, int drawableTypeOverride, glxWinScreen *winScreen)

+{

+  UINT numFormats;

+  unsigned int i = 0;

+

+  /* convert fbConfig to attr-value list  */

+  int attribList[60];

+

+  SET_ATTR_VALUE(WGL_SUPPORT_OPENGL_ARB, TRUE);

+  SET_ATTR_VALUE(WGL_PIXEL_TYPE_ARB, (mode->visualType == GLX_TRUE_COLOR) ? WGL_TYPE_RGBA_ARB : WGL_TYPE_COLORINDEX_ARB);

+  SET_ATTR_VALUE(WGL_COLOR_BITS_ARB, (mode->visualType == GLX_TRUE_COLOR) ? mode->rgbBits : mode->indexBits);

+  SET_ATTR_VALUE(WGL_RED_BITS_ARB, mode->redBits);

+  SET_ATTR_VALUE(WGL_GREEN_BITS_ARB, mode->greenBits);

+  SET_ATTR_VALUE(WGL_BLUE_BITS_ARB, mode->blueBits);

+  SET_ATTR_VALUE(WGL_ALPHA_BITS_ARB, mode->alphaBits);

+  SET_ATTR_VALUE(WGL_ACCUM_RED_BITS_ARB, mode->accumRedBits);

+  SET_ATTR_VALUE(WGL_ACCUM_GREEN_BITS_ARB, mode->accumGreenBits);

+  SET_ATTR_VALUE(WGL_ACCUM_BLUE_BITS_ARB, mode->accumBlueBits);

+  SET_ATTR_VALUE(WGL_ACCUM_ALPHA_BITS_ARB, mode->accumAlphaBits);

+  SET_ATTR_VALUE(WGL_DEPTH_BITS_ARB, mode->depthBits);

+  SET_ATTR_VALUE(WGL_STENCIL_BITS_ARB, mode->stencilBits);

+  SET_ATTR_VALUE(WGL_AUX_BUFFERS_ARB, mode->numAuxBuffers);

+

+  if (mode->doubleBufferMode)

+    SET_ATTR_VALUE(WGL_DOUBLE_BUFFER_ARB, TRUE);

+

+  if (mode->stereoMode)

+    SET_ATTR_VALUE(WGL_STEREO_ARB, TRUE);

+

+  // Some attributes are only added to the list if the value requested is not 'don't care', as exactly matching that is daft..

+  if (mode->swapMethod == GLX_SWAP_EXCHANGE_OML)

+    SET_ATTR_VALUE(WGL_SWAP_METHOD_ARB, WGL_SWAP_EXCHANGE_ARB);

+

+  if (mode->swapMethod == GLX_SWAP_COPY_OML)

+    SET_ATTR_VALUE(WGL_SWAP_COPY_ARB, TRUE);

+

+  // XXX: this should probably be the other way around, but that messes up drawableTypeOverride

+  if (mode->visualRating == GLX_SLOW_VISUAL_EXT)

+    SET_ATTR_VALUE(WGL_ACCELERATION_ARB, WGL_NO_ACCELERATION_ARB);

+

+  // must support all the drawable types the mode supports

+  if ((mode->drawableType | drawableTypeOverride) & GLX_WINDOW_BIT)

+    SET_ATTR_VALUE(WGL_DRAW_TO_WINDOW_ARB,TRUE);

+

+  // XXX: this is a horrible hacky heuristic, in fact this whole drawableTypeOverride thing is a bad idea

+  // try to avoid asking for formats which don't exist (by not asking for all when adjusting the config to include the drawableTypeOverride)

+  if (drawableTypeOverride == GLX_WINDOW_BIT)

+    {

+      if (mode->drawableType & GLX_PIXMAP_BIT)

+        SET_ATTR_VALUE(WGL_DRAW_TO_BITMAP_ARB, TRUE);

+

+      if (mode->drawableType & GLX_PBUFFER_BIT)

+        if (winScreen->has_WGL_ARB_pbuffer)

+          SET_ATTR_VALUE(WGL_DRAW_TO_PBUFFER_ARB, TRUE);

+    }

+  else

+    {

+      if (drawableTypeOverride & GLX_PIXMAP_BIT)

+        SET_ATTR_VALUE(WGL_DRAW_TO_BITMAP_ARB, TRUE);

+

+      if (drawableTypeOverride & GLX_PBUFFER_BIT)

+        if (winScreen->has_WGL_ARB_pbuffer)

+          SET_ATTR_VALUE(WGL_DRAW_TO_PBUFFER_ARB, TRUE);

+    }

+

+  SET_ATTR_VALUE(0, 0); // terminator

+

+  /* choose the first match */

+  {

+    int pixelFormatIndex;

+

+    if (!wglChoosePixelFormatARBWrapper(hdc, attribList, NULL, 1, &pixelFormatIndex, &numFormats))

+      {

+        ErrorF("wglChoosePixelFormat error: %s\n", glxWinErrorMessage());

+      }

+    else

+      {

+        if (numFormats > 0)

+          {

+            GLWIN_DEBUG_MSG("wglChoosePixelFormat: chose pixelFormatIndex %d)", pixelFormatIndex);

+            return pixelFormatIndex;

+          }

+        else

+          ErrorF("wglChoosePixelFormat couldn't decide\n");

+      }

+  }

+

+  return 0;

+}

+

+/* ---------------------------------------------------------------------- */

+

+#define BITS_AND_SHIFT_TO_MASK(bits,mask) (((1<<(bits))-1) << (mask))

+

+//

+// Create the GLXconfigs using DescribePixelFormat()

+//

+static void

+glxWinCreateConfigs(HDC hdc, glxWinScreen *screen)

+{

+  GLXWinConfig *c, *result, *prev = NULL;

+  int numConfigs = 0;

+  int i = 0;

+  int n = 0;

+  PIXELFORMATDESCRIPTOR pfd;

+

+  GLWIN_DEBUG_MSG("glxWinCreateConfigs");

+

+  screen->base.numFBConfigs = 0;

+  screen->base.fbconfigs = NULL;

+

+  // get the number of pixelformats

+  numConfigs = DescribePixelFormat(hdc, 1, sizeof(PIXELFORMATDESCRIPTOR), NULL);

+  GLWIN_DEBUG_MSG("DescribePixelFormat says %d possible pixel formats", numConfigs);

+

+  /* alloc */

+  result = malloc(sizeof(GLXWinConfig) * numConfigs);

+

+  if (NULL == result)

+    {

+      return;

+    }

+

+  memset(result, 0, sizeof(GLXWinConfig) * numConfigs);

+  n = 0;

+

+  /* fill in configs */

+  for (i = 0;  i < numConfigs; i++)

+    {

+      int rc;

+

+      c = &(result[i]);

+      c->base.next = NULL;

+      c->pixelFormatIndex = i+1;

+

+      rc = DescribePixelFormat(hdc, i+1, sizeof(PIXELFORMATDESCRIPTOR), &pfd);

+

+      if (!rc)

+        {

+          ErrorF("DescribePixelFormat failed for index %d, error %s\n", i+1, glxWinErrorMessage());

+          break;

+        }

+

+#ifdef _DEBUG

+      if (glxWinDebugSettings.dumpPFD)

+        pfdOut(&pfd);

+#endif

+

+      if (!(pfd.dwFlags & (PFD_DRAW_TO_WINDOW | PFD_DRAW_TO_BITMAP)) || !(pfd.dwFlags & PFD_SUPPORT_OPENGL))

+        {

+          GLWIN_DEBUG_MSG("pixelFormat %d has unsuitable flags 0x%08lx, skipping", i+1, pfd.dwFlags);

+          continue;

+        }

+

+      c->base.doubleBufferMode = (pfd.dwFlags & PFD_DOUBLEBUFFER) ? GL_TRUE : GL_FALSE;

+      c->base.stereoMode = (pfd.dwFlags & PFD_STEREO) ? GL_TRUE : GL_FALSE;

+

+      c->base.redBits = pfd.cRedBits;

+      c->base.greenBits = pfd.cGreenBits;

+      c->base.blueBits = pfd.cBlueBits;

+      c->base.alphaBits = pfd.cAlphaBits;

+

+      c->base.redMask = BITS_AND_SHIFT_TO_MASK(pfd.cRedBits, pfd.cRedShift);

+      c->base.greenMask =  BITS_AND_SHIFT_TO_MASK(pfd.cGreenBits, pfd.cGreenShift);

+      c->base.blueMask = BITS_AND_SHIFT_TO_MASK(pfd.cBlueBits, pfd.cBlueShift);

+      c->base.alphaMask = BITS_AND_SHIFT_TO_MASK(pfd.cAlphaBits, pfd.cAlphaShift);

+

+      c->base.rgbBits = pfd.cColorBits;

+

+      if (pfd.iPixelType == PFD_TYPE_COLORINDEX)

+        {

+          c->base.indexBits = pfd.cColorBits;

+        }

+      else

+        {

+          c->base.indexBits = 0;

+        }

+

+      c->base.accumRedBits = pfd.cAccumRedBits;

+      c->base.accumGreenBits = pfd.cAccumGreenBits;

+      c->base.accumBlueBits = pfd.cAccumBlueBits;

+      c->base.accumAlphaBits = pfd.cAccumAlphaBits;

+      //  pfd.cAccumBits;

+

+      c->base.depthBits = pfd.cDepthBits;

+      c->base.stencilBits = pfd.cStencilBits;

+      c->base.numAuxBuffers = pfd.cAuxBuffers;

+

+      // pfd.iLayerType; // ignored

+      c->base.level = 0;

+      // pfd.dwLayerMask; // ignored

+      // pfd.dwDamageMask;  // ignored

+

+      c->base.pixmapMode = 0;

+      c->base.visualID = -1;  // will be set by __glXScreenInit()

+

+      /* EXT_visual_rating / GLX 1.2 */

+      if (pfd.dwFlags & PFD_GENERIC_FORMAT)

+        {

+          c->base.visualRating = GLX_SLOW_VISUAL_EXT;

+        }

+      else

+        {

+          // PFD_GENERIC_ACCELERATED is not considered, so this may be MCD or ICD acclerated...

+          c->base.visualRating = GLX_NONE_EXT;

+        }

+

+      /* EXT_visual_info / GLX 1.2 */

+      if (pfd.iPixelType == PFD_TYPE_COLORINDEX)

+        {

+          c->base.visualType = GLX_STATIC_COLOR;

+        }

+      else

+        {

+          c->base.visualType = GLX_TRUE_COLOR;

+        }

+

+      // pfd.dwVisibleMask; ???

+      c->base.transparentPixel = GLX_NONE;

+      c->base.transparentRed = GLX_NONE;

+      c->base.transparentGreen = GLX_NONE;

+      c->base.transparentBlue = GLX_NONE;

+      c->base.transparentAlpha = GLX_NONE;

+      c->base.transparentIndex = GLX_NONE;

+

+      /* ARB_multisample / SGIS_multisample */

+      c->base.sampleBuffers = 0;

+      c->base.samples = 0;

+

+      /* SGIX_fbconfig / GLX 1.3 */

+      c->base.drawableType = (((pfd.dwFlags & PFD_DRAW_TO_WINDOW) ? GLX_WINDOW_BIT : 0)

+                         | ((pfd.dwFlags & PFD_DRAW_TO_BITMAP) ? GLX_PIXMAP_BIT : 0));

+

+      if (pfd.iPixelType == PFD_TYPE_COLORINDEX)

+        {

+          c->base.renderType = GLX_RGBA_BIT | GLX_COLOR_INDEX_BIT;

+        }

+      else

+        {

+          c->base.renderType = GLX_RGBA_BIT;

+        }

+

+      c->base.xRenderable = GL_TRUE;

+      c->base.fbconfigID = -1; // will be set by __glXScreenInit()

+

+      /* SGIX_pbuffer / GLX 1.3 */

+      // XXX: How can we find these values out ???

+      c->base.maxPbufferWidth = -1;

+      c->base.maxPbufferHeight = -1;

+      c->base.maxPbufferPixels = -1;

+      c->base.optimalPbufferWidth = 0; // there is no optimal value

+      c->base.optimalPbufferHeight = 0;

+

+      /* SGIX_visual_select_group */

+      // arrange for visuals with the best acceleration to be preferred in selection

+      switch (pfd.dwFlags & (PFD_GENERIC_FORMAT | PFD_GENERIC_ACCELERATED))

+        {

+        case 0:

+          c->base.visualSelectGroup = 2;

+          break;

+

+        case PFD_GENERIC_ACCELERATED:

+          c->base.visualSelectGroup = 1;

+          break;

+

+        case PFD_GENERIC_FORMAT:

+          c->base.visualSelectGroup = 0;

+          break;

+

+        default:

+          ;

+          // "can't happen"

+        }

+

+      /* OML_swap_method */

+      if (pfd.dwFlags & PFD_SWAP_EXCHANGE)

+        c->base.swapMethod = GLX_SWAP_EXCHANGE_OML;

+      else if (pfd.dwFlags & PFD_SWAP_COPY)

+        c->base.swapMethod = GLX_SWAP_COPY_OML;

+      else

+        c->base.swapMethod = GLX_SWAP_UNDEFINED_OML;

+

+      /* EXT_import_context */

+      c->base.screen = screen->base.pScreen->myNum;

+

+      /* EXT_texture_from_pixmap */

+      c->base.bindToTextureRgb = -1;

+      c->base.bindToTextureRgba = -1;

+      c->base.bindToMipmapTexture = -1;

+      c->base.bindToTextureTargets = -1;

+      c->base.yInverted = -1;

+

+      n++;

+

+      // update previous config to point to this config

+      if (prev)

+        prev->base.next = &(c->base);

+

+      prev = c;

+    }

+

+  GLWIN_DEBUG_MSG("found %d pixelFormats suitable for conversion to fbConfigs", n);

+

+  screen->base.numFBConfigs = n;

+  screen->base.fbconfigs = &(result->base);

+}

+

+// helper function to access an attribute value from an attribute value array by attribute

+static

+int getAttrValue(const int attrs[], int values[], unsigned int num, int attr, int fallback)

+{

+  unsigned int i;

+  for (i = 0; i < num; i++)

+    {

+      if (attrs[i] == attr)

+        {

+          GLWIN_TRACE_MSG("getAttrValue attr 0x%x, value %d", attr, values[i]);

+          return values[i];

+        }

+    }

+

+  ErrorF("getAttrValue failed to find attr 0x%x, using default value %d\n", attr, fallback);

+  return fallback;

+}

+

+//

+// Create the GLXconfigs using wglGetPixelFormatAttribfvARB() extension

+//

+static void

+glxWinCreateConfigsExt(HDC hdc, glxWinScreen *screen)

+{

+  GLXWinConfig *c, *result, *prev = NULL;

+  int i = 0;

+  int n = 0;

+

+  const int attr = WGL_NUMBER_PIXEL_FORMATS_ARB;

+  int numConfigs;

+

+  int attrs[50];

+  unsigned int num_attrs = 0;

+

+  GLWIN_DEBUG_MSG("glxWinCreateConfigsExt");

+

+  screen->base.numFBConfigs = 0;

+  screen->base.fbconfigs = NULL;

+

+  if (!wglGetPixelFormatAttribivARBWrapper(hdc, 0, 0, 1, &attr, &numConfigs))

+    {

+      ErrorF("wglGetPixelFormatAttribivARB failed for WGL_NUMBER_PIXEL_FORMATS_ARB: %s\n", glxWinErrorMessage());

+      return;

+    }

+

+  GLWIN_DEBUG_MSG("wglGetPixelFormatAttribivARB says %d possible pixel formats", numConfigs);

+

+  /* alloc */

+  result = malloc(sizeof(GLXWinConfig) * numConfigs);

+

+  if (NULL == result)

+    {

+      return;

+    }

+

+  memset(result, 0, sizeof(GLXWinConfig) * numConfigs);

+  n = 0;

+

+#define ADD_ATTR(a) { attrs[num_attrs++] = a; assert(num_attrs < NUM_ELEMENTS(attrs)); }

+

+  ADD_ATTR(WGL_DRAW_TO_WINDOW_ARB);

+  ADD_ATTR(WGL_DRAW_TO_BITMAP_ARB);

+  ADD_ATTR(WGL_ACCELERATION_ARB);

+  ADD_ATTR(WGL_SWAP_LAYER_BUFFERS_ARB);

+  ADD_ATTR(WGL_NUMBER_OVERLAYS_ARB);

+  ADD_ATTR(WGL_NUMBER_UNDERLAYS_ARB);

+  ADD_ATTR(WGL_TRANSPARENT_ARB);

+  ADD_ATTR(WGL_TRANSPARENT_RED_VALUE_ARB);

+  ADD_ATTR(WGL_TRANSPARENT_GREEN_VALUE_ARB);

+  ADD_ATTR(WGL_TRANSPARENT_GREEN_VALUE_ARB);

+  ADD_ATTR(WGL_TRANSPARENT_ALPHA_VALUE_ARB);

+  ADD_ATTR(WGL_SUPPORT_OPENGL_ARB);

+  ADD_ATTR(WGL_DOUBLE_BUFFER_ARB);

+  ADD_ATTR(WGL_STEREO_ARB);

+  ADD_ATTR(WGL_PIXEL_TYPE_ARB);

+  ADD_ATTR(WGL_COLOR_BITS_ARB);

+  ADD_ATTR(WGL_RED_BITS_ARB);

+  ADD_ATTR(WGL_RED_SHIFT_ARB);

+  ADD_ATTR(WGL_GREEN_BITS_ARB);

+  ADD_ATTR(WGL_GREEN_SHIFT_ARB);

+  ADD_ATTR(WGL_BLUE_BITS_ARB);

+  ADD_ATTR(WGL_BLUE_SHIFT_ARB);

+  ADD_ATTR(WGL_ALPHA_BITS_ARB);

+  ADD_ATTR(WGL_ALPHA_SHIFT_ARB);

+  ADD_ATTR(WGL_ACCUM_RED_BITS_ARB);

+  ADD_ATTR(WGL_ACCUM_GREEN_BITS_ARB);

+  ADD_ATTR(WGL_ACCUM_BLUE_BITS_ARB);

+  ADD_ATTR(WGL_ACCUM_ALPHA_BITS_ARB);

+  ADD_ATTR(WGL_DEPTH_BITS_ARB);

+  ADD_ATTR(WGL_STENCIL_BITS_ARB);

+  ADD_ATTR(WGL_AUX_BUFFERS_ARB);

+  ADD_ATTR(WGL_SWAP_METHOD_ARB);

+

+  if (screen->has_WGL_ARB_multisample)

+    {

+      // we may not query these attrs if WGL_ARB_multisample is not offered

+      ADD_ATTR(WGL_SAMPLE_BUFFERS_ARB);

+      ADD_ATTR(WGL_SAMPLES_ARB);

+    }

+

+  if (screen->has_WGL_ARB_render_texture)

+    {

+      // we may not query these attrs if WGL_ARB_render_texture is not offered

+      ADD_ATTR(WGL_BIND_TO_TEXTURE_RGB_ARB);

+      ADD_ATTR(WGL_BIND_TO_TEXTURE_RGBA_ARB);

+    }

+

+  if (screen->has_WGL_ARB_pbuffer)

+    {

+      // we may not query these attrs if WGL_ARB_pbuffer is not offered

+      ADD_ATTR(WGL_DRAW_TO_PBUFFER_ARB);

+      ADD_ATTR(WGL_MAX_PBUFFER_PIXELS_ARB);

+      ADD_ATTR(WGL_MAX_PBUFFER_WIDTH_ARB);

+      ADD_ATTR(WGL_MAX_PBUFFER_HEIGHT_ARB);

+    }

+

+  /* fill in configs */

+  for (i = 0;  i < numConfigs; i++)

+    {

+      int sizevalues=num_attrs*sizeof(int);

+      int *values=(int*)_alloca(sizevalues);

+

+      memset(values,0,sizevalues);

+

+      c = &(result[i]);

+      c->base.next = NULL;

+      c->pixelFormatIndex = i+1;

+

+      if (!wglGetPixelFormatAttribivARBWrapper(hdc, i+1, 0, num_attrs, attrs, values))

+        {

+          ErrorF("wglGetPixelFormatAttribivARB failed for index %d, error %s\n", i+1, glxWinErrorMessage());

+          break;

+        }

+

+#define ATTR_VALUE(a, d) getAttrValue(attrs, values, num_attrs, (a), (d))

+

+      if (!ATTR_VALUE(WGL_SUPPORT_OPENGL_ARB, 0))

+        {

+          GLWIN_DEBUG_MSG("pixelFormat %d isn't WGL_SUPPORT_OPENGL_ARB, skipping", i+1);

+          continue;

+        }

+

+      c->base.doubleBufferMode = ATTR_VALUE(WGL_DOUBLE_BUFFER_ARB, 0) ? GL_TRUE : GL_FALSE;

+      c->base.stereoMode = ATTR_VALUE(WGL_STEREO_ARB, 0) ? GL_TRUE : GL_FALSE;

+

+      c->base.redBits = ATTR_VALUE(WGL_RED_BITS_ARB, 0);

+      c->base.greenBits = ATTR_VALUE(WGL_GREEN_BITS_ARB, 0);

+      c->base.blueBits = ATTR_VALUE(WGL_BLUE_BITS_ARB, 0);

+      c->base.alphaBits = ATTR_VALUE(WGL_ALPHA_BITS_ARB, 0);

+

+      c->base.redMask = BITS_AND_SHIFT_TO_MASK(c->base.redBits, ATTR_VALUE(WGL_RED_SHIFT_ARB, 0));

+      c->base.greenMask = BITS_AND_SHIFT_TO_MASK(c->base.greenBits, ATTR_VALUE(WGL_GREEN_SHIFT_ARB, 0));

+      c->base.blueMask = BITS_AND_SHIFT_TO_MASK(c->base.blueBits, ATTR_VALUE(WGL_BLUE_SHIFT_ARB, 0));

+      c->base.alphaMask = BITS_AND_SHIFT_TO_MASK(c->base.alphaBits, ATTR_VALUE(WGL_ALPHA_SHIFT_ARB, 0));

+

+      switch (ATTR_VALUE(WGL_PIXEL_TYPE_ARB, 0))

+        {

+        case WGL_TYPE_COLORINDEX_ARB:

+          c->base.indexBits = ATTR_VALUE(WGL_COLOR_BITS_ARB, 0);

+          c->base.rgbBits = 0;

+          c->base.visualType = GLX_STATIC_COLOR;

+          break;

+

+        case WGL_TYPE_RGBA_FLOAT_ARB:

+          GLWIN_DEBUG_MSG("pixelFormat %d is WGL_TYPE_RGBA_FLOAT_ARB, skipping", i+1);

+          continue;

+

+        case WGL_TYPE_RGBA_UNSIGNED_FLOAT_EXT:

+          GLWIN_DEBUG_MSG("pixelFormat %d is WGL_TYPE_RGBA_UNSIGNED_FLOAT_EXT, skipping", i+1);

+          continue;

+

+        case WGL_TYPE_RGBA_ARB:

+          c->base.indexBits = 0;

+          c->base.rgbBits = ATTR_VALUE(WGL_COLOR_BITS_ARB, 0);

+          c->base.visualType = GLX_TRUE_COLOR;

+          break;

+

+        default:

+          ErrorF("wglGetPixelFormatAttribivARB returned unknown value 0x%x for WGL_PIXEL_TYPE_ARB\n", ATTR_VALUE(WGL_PIXEL_TYPE_ARB, 0));

+          continue;

+        }

+

+      c->base.accumRedBits = ATTR_VALUE(WGL_ACCUM_RED_BITS_ARB, 0);

+      c->base.accumGreenBits = ATTR_VALUE(WGL_ACCUM_GREEN_BITS_ARB, 0);

+      c->base.accumBlueBits = ATTR_VALUE(WGL_ACCUM_BLUE_BITS_ARB, 0);

+      c->base.accumAlphaBits = ATTR_VALUE(WGL_ACCUM_ALPHA_BITS_ARB, 0);

+

+      c->base.depthBits = ATTR_VALUE(WGL_DEPTH_BITS_ARB, 0);

+      c->base.stencilBits = ATTR_VALUE(WGL_STENCIL_BITS_ARB, 0);

+      c->base.numAuxBuffers = ATTR_VALUE(WGL_AUX_BUFFERS_ARB, 0);

+

+      {

+        int layers = ATTR_VALUE(WGL_NUMBER_OVERLAYS_ARB,0) + ATTR_VALUE(WGL_NUMBER_UNDERLAYS_ARB, 0);

+

+        if (layers > 0)

+          {

+            ErrorF("pixelFormat %d: has %d overlay, %d underlays which aren't currently handled", i, ATTR_VALUE(WGL_NUMBER_OVERLAYS_ARB,0), ATTR_VALUE(WGL_NUMBER_UNDERLAYS_ARB, 0));

+            // XXX: need to iterate over layers?

+          }

+      }

+      c->base.level = 0;

+

+      c->base.pixmapMode = 0; // ???

+      c->base.visualID = -1;  // will be set by __glXScreenInit()

+

+      /* EXT_visual_rating / GLX 1.2 */

+      switch (ATTR_VALUE(WGL_ACCELERATION_ARB, 0))

+        {

+        default:

+          ErrorF("wglGetPixelFormatAttribivARB returned unknown value 0x%x for WGL_ACCELERATION_ARB\n", ATTR_VALUE(WGL_ACCELERATION_ARB, 0));

+

+        case WGL_NO_ACCELERATION_ARB:

+          c->base.visualRating = GLX_SLOW_VISUAL_EXT;

+          break;

+

+        case WGL_GENERIC_ACCELERATION_ARB:

+        case WGL_FULL_ACCELERATION_ARB:

+          c->base.visualRating = GLX_NONE_EXT;

+          break;

+        }

+

+      /* EXT_visual_info / GLX 1.2 */

+      // c->base.visualType is set above

+      if (ATTR_VALUE(WGL_TRANSPARENT_ARB, 0))

+        {

+          c->base.transparentPixel = (c->base.visualType == GLX_TRUE_COLOR) ? GLX_TRANSPARENT_RGB_EXT : GLX_TRANSPARENT_INDEX_EXT;

+          c->base.transparentRed = ATTR_VALUE(WGL_TRANSPARENT_RED_VALUE_ARB, 0);

+          c->base.transparentGreen = ATTR_VALUE(WGL_TRANSPARENT_GREEN_VALUE_ARB, 0);

+          c->base.transparentBlue = ATTR_VALUE(WGL_TRANSPARENT_BLUE_VALUE_ARB, 0);

+          c->base.transparentAlpha = ATTR_VALUE(WGL_TRANSPARENT_ALPHA_VALUE_ARB, 0);

+          c->base.transparentIndex = ATTR_VALUE(WGL_TRANSPARENT_INDEX_VALUE_ARB, 0);

+        }

+      else

+        {

+          c->base.transparentPixel = GLX_NONE_EXT;

+          c->base.transparentRed = GLX_NONE;

+          c->base.transparentGreen = GLX_NONE;

+          c->base.transparentBlue = GLX_NONE;

+          c->base.transparentAlpha = GLX_NONE;

+          c->base.transparentIndex = GLX_NONE;

+        }

+

+      /* ARB_multisample / SGIS_multisample */

+      if (screen->has_WGL_ARB_multisample)

+        {

+          c->base.sampleBuffers = ATTR_VALUE(WGL_SAMPLE_BUFFERS_ARB, 0);

+          c->base.samples = ATTR_VALUE(WGL_SAMPLES_ARB, 0);

+        }

+      else

+        {

+          c->base.sampleBuffers = 0;

+          c->base.samples = 0;

+        }

+

+      /* SGIX_fbconfig / GLX 1.3 */

+      c->base.drawableType = ((ATTR_VALUE(WGL_DRAW_TO_WINDOW_ARB, 0) ? GLX_WINDOW_BIT : 0)

+                         | (ATTR_VALUE(WGL_DRAW_TO_BITMAP_ARB, 0) ? GLX_PIXMAP_BIT : 0)

+                         | (ATTR_VALUE(WGL_DRAW_TO_PBUFFER_ARB, 0) ? GLX_PBUFFER_BIT : 0));

+

+      /*

+        Assume OpenGL RGBA rendering is available on all visuals

+        (it is specified to render to red component in single-channel visuals,

+        if supported, but there doesn't seem to be any mechanism to check if it

+        is supported)

+

+        Color index rendering is only supported on single-channel visuals

+      */

+      if (c->base.visualType == GLX_STATIC_COLOR)

+        {

+          c->base.renderType = GLX_RGBA_BIT | GLX_COLOR_INDEX_BIT;

+        }

+      else

+        {

+          c->base.renderType = GLX_RGBA_BIT;

+        }

+

+      c->base.xRenderable = GL_TRUE;

+      c->base.fbconfigID = -1; // will be set by __glXScreenInit()

+

+      /* SGIX_pbuffer / GLX 1.3 */

+      if (screen->has_WGL_ARB_pbuffer)

+        {

+          c->base.maxPbufferWidth = ATTR_VALUE(WGL_MAX_PBUFFER_WIDTH_ARB, -1);

+          c->base.maxPbufferHeight = ATTR_VALUE(WGL_MAX_PBUFFER_HEIGHT_ARB, -1);

+          c->base.maxPbufferPixels =  ATTR_VALUE(WGL_MAX_PBUFFER_PIXELS_ARB, -1);

+        }

+      else

+        {

+          c->base.maxPbufferWidth = -1;

+          c->base.maxPbufferHeight = -1;

+          c->base.maxPbufferPixels =  -1;

+        }

+      c->base.optimalPbufferWidth = 0; // there is no optimal value

+      c->base.optimalPbufferHeight = 0;

+

+      /* SGIX_visual_select_group */

+      // arrange for visuals with the best acceleration to be preferred in selection

+      switch (ATTR_VALUE(WGL_ACCELERATION_ARB, 0))

+        {

+        case WGL_FULL_ACCELERATION_ARB:

+          c->base.visualSelectGroup = 2;

+          break;

+

+        case WGL_GENERIC_ACCELERATION_ARB:

+          c->base.visualSelectGroup = 1;

+          break;

+

+        default:

+        case WGL_NO_ACCELERATION_ARB:

+          c->base.visualSelectGroup = 0;

+          break;

+        }

+

+      /* OML_swap_method */

+      switch (ATTR_VALUE(WGL_SWAP_METHOD_ARB, 0))

+        {

+        case WGL_SWAP_EXCHANGE_ARB:

+          c->base.swapMethod = GLX_SWAP_EXCHANGE_OML;

+          break;

+

+        case WGL_SWAP_COPY_ARB:

+          c->base.swapMethod = GLX_SWAP_COPY_OML;

+          break;

+

+        default:

+          ErrorF("wglGetPixelFormatAttribivARB returned unknown value 0x%x for WGL_SWAP_METHOD_ARB\n", ATTR_VALUE(WGL_SWAP_METHOD_ARB, 0));

+

+        case WGL_SWAP_UNDEFINED_ARB:

+          c->base.swapMethod = GLX_SWAP_UNDEFINED_OML;

+        }

+

+      /* EXT_import_context */

+      c->base.screen = screen->base.pScreen->myNum;

+

+      /* EXT_texture_from_pixmap */

+      /*

+         Mesa's DRI configs always have bindToTextureRgb/Rgba TRUE (see driCreateConfigs(), so setting

+         bindToTextureRgb/bindToTextureRgba to FALSE means that swrast can't find any fbConfigs to use,

+         so setting these to 0, even if we know bindToTexture isn't available, isn't a good idea...

+       */

+      if (screen->has_WGL_ARB_render_texture)

+        {

+          c->base.bindToTextureRgb = ATTR_VALUE(WGL_BIND_TO_TEXTURE_RGB_ARB, -1);

+          c->base.bindToTextureRgba = ATTR_VALUE(WGL_BIND_TO_TEXTURE_RGBA_ARB, -1);

+        }

+      else

+        {

+          c->base.bindToTextureRgb = -1;

+          c->base.bindToTextureRgba = -1;

+        }

+      c->base.bindToMipmapTexture = -1;

+      c->base.bindToTextureTargets = GLX_TEXTURE_1D_BIT_EXT | GLX_TEXTURE_2D_BIT_EXT | GLX_TEXTURE_RECTANGLE_BIT_EXT;

+      c->base.yInverted = -1;

+

+      n++;

+

+      // update previous config to point to this config

+      if (prev)

+        prev->base.next = &(c->base);

+

+      prev = c;

+    }

+

+  screen->base.numFBConfigs = n;

+  screen->base.fbconfigs = &(result->base);

+}