Fix CRLF line endings.

1 files changed, 679 insertions, 679 deletions

diff --git a/src/glut/os2/glut_gamemode.cpp b/src/glut/os2/glut_gamemode.cpp
index 50185d7b9d4..39918fdf39b 100644
--- a/src/glut/os2/glut_gamemode.cpp
+++ b/src/glut/os2/glut_gamemode.cpp
@@ -1,680 +1,680 @@
-

-/* Copyright (c) Mark J. Kilgard, 1998. */

-

-/* This program is freely distributable without licensing fees

-   and is provided without guarantee or warrantee expressed or

-   implied. This program is -not- in the public domain. */

-

-

-#include <assert.h>

-#include <stdio.h>

-#include <stdlib.h>

-#include <string.h>

-

-#include "glutint.h"

-

-#if !defined(_WIN32) && !defined(__OS2__)

-#include <X11/Xlib.h>

-#include <X11/Xatom.h>

-

-/* SGI optimization introduced in IRIX 6.3 to avoid X server

-   round trips for interning common X atoms. */

-#if defined(_SGI_EXTRA_PREDEFINES) && !defined(NO_FAST_ATOMS)

-#include <X11/SGIFastAtom.h>

-#else

-#define XSGIFastInternAtom(dpy,string,fast_name,how) XInternAtom(dpy,string,how)

-#endif

-#endif  /* not _WIN32 */

-

-int __glutDisplaySettingsChanged = 0;

-static DisplayMode *dmodes, *currentDm = NULL;

-static int ndmodes = -1;

-GLUTwindow *__glutGameModeWindow = NULL;

-

-#ifdef TEST

-static char *compstr[] =

-{

-  "none", "=", "!=", "<=", ">=", ">", "<", "~"

-};

-static char *capstr[] =

-{

-  "width", "height", "bpp", "hertz", "num"

-};

-#endif

-

-#if defined(__OS2__)

-void

-#else

-void __cdecl

-#endif

-__glutCloseDownGameMode(void)

-{

-  if (__glutDisplaySettingsChanged) {

-#ifdef _WIN32

-    /* Assumes that display settings have been changed, that

-       is __glutDisplaySettingsChanged is true. */

-    ChangeDisplaySettings(NULL, 0);

-#endif

-    __glutDisplaySettingsChanged = 0;

-  }

-  __glutGameModeWindow = NULL;

-}

-

-void GLUTAPIENTRY

-glutLeaveGameMode(void)

-{

-  if (__glutGameModeWindow == NULL) {

-    __glutWarning("not in game mode so cannot leave game mode");

-    return;

-  }

-  __glutDestroyWindow(__glutGameModeWindow,

-    __glutGameModeWindow);

-  XFlush(__glutDisplay);

-  __glutGameModeWindow = NULL;

-}

-

-#ifdef _WIN32

-

-/* Same values as from MSDN's SetDisp.c example. */

-#define MIN_WIDTH 400

-#define MIN_FREQUENCY 60

-

-static void

-initGameModeSupport(void)

-{

-  DEVMODE dm;

-  DWORD mode;

-  int i;

-

-  if (ndmodes >= 0) {

-    /* ndmodes is initially -1 to indicate no

-       dmodes allocated yet. */

-    return;

-  }

-

-  /* Determine how many display modes there are. */

-  ndmodes = 0;

-  mode = 0;

-  while (EnumDisplaySettings(NULL, mode, &dm)) {

-    if (dm.dmPelsWidth >= MIN_WIDTH &&

-      (dm.dmDisplayFrequency == 0 ||

-      dm.dmDisplayFrequency >= MIN_FREQUENCY)) {

-      ndmodes++;

-    }

-    mode++;

-  }

-

-  /* Allocate memory for a list of all the display modes. */

-  dmodes = (DisplayMode*)

-    malloc(ndmodes * sizeof(DisplayMode));

-

-  /* Now that we know how many display modes to expect,

-     enumerate them again and save the information in

-     the list we allocated above. */

-  i = 0;

-  mode = 0;

-  while (EnumDisplaySettings(NULL, mode, &dm)) {

-    /* Try to reject any display settings that seem unplausible. */

-    if (dm.dmPelsWidth >= MIN_WIDTH &&

-      (dm.dmDisplayFrequency == 0 ||

-      dm.dmDisplayFrequency >= MIN_FREQUENCY)) {

-      dmodes[i].devmode = dm;

-      dmodes[i].valid = 1;  /* XXX Not used for now. */

-      dmodes[i].cap[DM_WIDTH] = dm.dmPelsWidth;

-      dmodes[i].cap[DM_HEIGHT] = dm.dmPelsHeight;

-      dmodes[i].cap[DM_PIXEL_DEPTH] = dm.dmBitsPerPel;

-      if (dm.dmDisplayFrequency == 0) {

-       /* Guess a reasonable guess. */

-       /* Lame Windows 95 version of EnumDisplaySettings. */

-        dmodes[i].cap[DM_HERTZ] = 60;

-      } else {

-       dmodes[i].cap[DM_HERTZ] = dm.dmDisplayFrequency;

-      }

-      i++;

-    }

-    mode++;

-  }

-

-  assert(i == ndmodes);

-}

-

-#else

-

-/* X Windows version of initGameModeSupport. */

-static void

-initGameModeSupport(void)

-{

-  if (ndmodes >= 0) {

-    /* ndmodes is initially -1 to indicate no

-       dmodes allocated yet. */

-    return;

-  }

-

-  /* Determine how many display modes there are. */

-  ndmodes = 0;

-}

-

-#endif

-

-/* This routine is based on similiar code in glut_dstr.c */

-static DisplayMode *

-findMatch(DisplayMode * dmodes, int ndmodes,

-  Criterion * criteria, int ncriteria)

-{

-  DisplayMode *found;

-  int *bestScore, *thisScore;

-  int i, j, numok, result = 0, worse, better;

-

-  found = NULL;

-  numok = 1;            /* "num" capability is indexed from 1,

-                           not 0. */

-

-  /* XXX alloca canidate. */

-  bestScore = (int *) malloc(ncriteria * sizeof(int));

-  if (!bestScore) {

-    __glutFatalError("out of memory.");

-  }

-  for (j = 0; j < ncriteria; j++) {

-    /* Very negative number. */

-    bestScore[j] = -32768;

-  }

-

-  /* XXX alloca canidate. */

-  thisScore = (int *) malloc(ncriteria * sizeof(int));

-  if (!thisScore) {

-    __glutFatalError("out of memory.");

-  }

-

-  for (i = 0; i < ndmodes; i++) {

-    if (dmodes[i].valid) {

-      worse = 0;

-      better = 0;

-

-      for (j = 0; j < ncriteria; j++) {

-        int cap, cvalue, dvalue;

-

-        cap = criteria[j].capability;

-        cvalue = criteria[j].value;

-        if (cap == NUM) {

-          dvalue = numok;

-        } else {

-          dvalue = dmodes[i].cap[cap];

-        }

-#ifdef TEST

-        if (verbose)

-          printf("  %s %s %d to %d\n",

-            capstr[cap], compstr[criteria[j].comparison], cvalue, dvalue);

-#endif

-        switch (criteria[j].comparison) {

-        case EQ:

-          result = cvalue == dvalue;

-          thisScore[j] = 1;

-          break;

-        case NEQ:

-          result = cvalue != dvalue;

-          thisScore[j] = 1;

-          break;

-        case LT:

-          result = dvalue < cvalue;

-          thisScore[j] = dvalue - cvalue;

-          break;

-        case GT:

-          result = dvalue > cvalue;

-          thisScore[j] = dvalue - cvalue;

-          break;

-        case LTE:

-          result = dvalue <= cvalue;

-          thisScore[j] = dvalue - cvalue;

-          break;

-        case GTE:

-          result = (dvalue >= cvalue);

-          thisScore[j] = dvalue - cvalue;

-          break;

-        case MIN:

-          result = dvalue >= cvalue;

-          thisScore[j] = cvalue - dvalue;

-          break;

-        }

-

-#ifdef TEST

-        if (verbose)

-          printf("                result=%d   score=%d   bestScore=%d\n", result, thisScore[j], bestScore[j]);

-#endif

-

-        if (result) {

-          if (better || thisScore[j] > bestScore[j]) {

-            better = 1;

-          } else if (thisScore[j] == bestScore[j]) {

-            /* Keep looking. */

-          } else {

-            goto nextDM;

-          }

-        } else {

-          if (cap == NUM) {

-            worse = 1;

-          } else {

-            goto nextDM;

-          }

-        }

-

-      }

-

-      if (better && !worse) {

-        found = &dmodes[i];

-        for (j = 0; j < ncriteria; j++) {

-          bestScore[j] = thisScore[j];

-        }

-      }

-      numok++;

-

-    nextDM:;

-

-    }

-  }

-  free(bestScore);

-  free(thisScore);

-  return found;

-}

-

-/**

- * Parses strings in the form of:

- *  800x600

- *  800x600:16

- *  800x600@60

- *  800x600:16@60

- *  @60

- *  :16

- *  :16@60

- * NOTE that @ before : is not parsed.

- */

-static int

-specialCaseParse(char *word, Criterion * criterion, int mask)

-{

-  char *xstr, *response;

-  int got;

-  int width, height, bpp, hertz;

-

-  switch(word[0]) {

-  case '0':

-  case '1':

-  case '2':

-  case '3':

-  case '4':

-  case '5':

-  case '6':

-  case '7':

-  case '8':

-  case '9':

-    /* The WWWxHHH case. */

-    if (mask & (1 << DM_WIDTH)) {

-      return -1;

-    }

-    xstr = strpbrk(&word[1], "x");

-    if (xstr) {

-      width = (int) strtol(word, &response, 0);

-      if (response == word || response[0] != 'x') {

-        /* Not a valid number OR needs to be followed by 'x'. */

-       return -1;

-      }

-      height = (int) strtol(&xstr[1], &response, 0);

-      if (response == &xstr[1]) {

-        /* Not a valid number. */

-       return -1;

-      }

-      criterion[0].capability = DM_WIDTH;

-      criterion[0].comparison = EQ;

-      criterion[0].value = width;

-      criterion[1].capability = DM_HEIGHT;

-      criterion[1].comparison = EQ;

-      criterion[1].value = height;

-      got = specialCaseParse(response,

-        &criterion[2], 1 << DM_WIDTH);

-      if (got >= 0) {

-        return got + 2;

-      } else {

-        return -1;

-      }

-    }

-    return -1;

-  case ':':

-    /* The :BPP case. */

-    if (mask & (1 << DM_PIXEL_DEPTH)) {

-      return -1;

-    }

-    bpp = (int) strtol(&word[1], &response, 0);

-    if (response == &word[1]) {

-      /* Not a valid number. */

-      return -1;

-    }

-    criterion[0].capability = DM_PIXEL_DEPTH;

-    criterion[0].comparison = EQ;

-    criterion[0].value = bpp;

-    got = specialCaseParse(response,

-      &criterion[1], (1 << DM_WIDTH) | (1 << DM_PIXEL_DEPTH));

-    if (got >= 0) {

-      return got + 1;

-    } else {

-      return -1;

-    }

-  case '@':

-    /* The @HZ case. */

-    if (mask & (1 << DM_HERTZ)) {

-      return -1;

-    }

-    hertz = (int) strtol(&word[1], &response, 0);

-    if (response == &word[1]) {

-      /* Not a valid number. */

-      return -1;

-    }

-    criterion[0].capability = DM_HERTZ;

-    criterion[0].comparison = EQ;

-    criterion[0].value = hertz;

-    got = specialCaseParse(response,

-      &criterion[1], ~DM_HERTZ);

-    if (got >= 0) {

-      return got + 1;

-    } else {

-      return -1;

-    }

-  case '\0':

-    return 0;

-  }

-  return -1;

-}

-

-/* This routine is based on similiar code in glut_dstr.c */

-static int

-parseCriteria(char *word, Criterion * criterion)

-{

-  char *cstr, *vstr, *response;

-  int comparator, value = 0;

-

-  cstr = strpbrk(word, "=><!~");

-  if (cstr) {

-    switch (cstr[0]) {

-    case '=':

-      comparator = EQ;

-      vstr = &cstr[1];

-      break;

-    case '~':

-      comparator = MIN;

-      vstr = &cstr[1];

-      break;

-    case '>':

-      if (cstr[1] == '=') {

-        comparator = GTE;

-        vstr = &cstr[2];

-      } else {

-        comparator = GT;

-        vstr = &cstr[1];

-      }

-      break;

-    case '<':

-      if (cstr[1] == '=') {

-        comparator = LTE;

-        vstr = &cstr[2];

-      } else {

-        comparator = LT;

-        vstr = &cstr[1];

-      }

-      break;

-    case '!':

-      if (cstr[1] == '=') {

-        comparator = NEQ;

-        vstr = &cstr[2];

-      } else {

-        return -1;

-      }

-      break;

-    default:

-      return -1;

-    }

-    value = (int) strtol(vstr, &response, 0);

-    if (response == vstr) {

-      /* Not a valid number. */

-      return -1;

-    }

-    *cstr = '\0';

-  } else {

-    comparator = NONE;

-  }

-  switch (word[0]) {

-  case 'b':

-    if (!strcmp(word, "bpp")) {

-      criterion[0].capability = DM_PIXEL_DEPTH;

-      if (comparator == NONE) {

-        return -1;

-      } else {

-        criterion[0].comparison = comparator;

-        criterion[0].value = value;

-        return 1;

-      }

-    }

-    return -1;

-  case 'h':

-    if (!strcmp(word, "height")) {

-      criterion[0].capability = DM_HEIGHT;

-      if (comparator == NONE) {

-        return -1;

-      } else {

-        criterion[0].comparison = comparator;

-        criterion[0].value = value;

-        return 1;

-      }

-    }

-    if (!strcmp(word, "hertz")) {

-      criterion[0].capability = DM_HERTZ;

-      if (comparator == NONE) {

-        return -1;

-      } else {

-        criterion[0].comparison = comparator;

-        criterion[0].value = value;

-        return 1;

-      }

-    }

-    return -1;

-  case 'n':

-    if (!strcmp(word, "num")) {

-      criterion[0].capability = DM_NUM;

-      if (comparator == NONE) {

-        return -1;

-      } else {

-        criterion[0].comparison = comparator;

-        criterion[0].value = value;

-        return 1;

-      }

-    }

-    return -1;

-  case 'w':

-    if (!strcmp(word, "width")) {

-      criterion[0].capability = DM_WIDTH;

-      if (comparator == NONE) {

-        return -1;

-      } else {

-        criterion[0].comparison = comparator;

-        criterion[0].value = value;

-        return 1;

-      }

-    }

-    return -1;

-  }

-  if (comparator == NONE) {

-    return specialCaseParse(word, criterion, 0);

-  }

-  return -1;

-}

-

-/* This routine is based on similiar code in glut_dstr.c */

-static Criterion *

-parseDisplayString(const char *display, int *ncriteria)

-{

-  Criterion *criteria = NULL;

-  int n, parsed;

-  char *copy, *word;

-

-  copy = __glutStrdup(display);

-  /* Attempt to estimate how many criteria entries should be

-     needed. */

-  n = 0;

-  word = strtok(copy, " \t");

-  while (word) {

-    n++;

-    word = strtok(NULL, " \t");

-  }

-  /* Allocate number of words of criteria.  A word

-     could contain as many as four criteria in the

-     worst case.  Example: 800x600:16@60 */

-  criteria = (Criterion *) malloc(4 * n * sizeof(Criterion));

-  if (!criteria) {

-    __glutFatalError("out of memory.");

-  }

-

-  /* Re-copy the copy of the display string. */

-  strcpy(copy, display);

-

-  n = 0;

-  word = strtok(copy, " \t");

-  while (word) {

-    parsed = parseCriteria(word, &criteria[n]);

-    if (parsed >= 0) {

-      n += parsed;

-    } else {

-      __glutWarning("Unrecognized game mode string word: %s (ignoring)\n", word);

-    }

-    word = strtok(NULL, " \t");

-  }

-

-  free(copy);

-  *ncriteria = n;

-  return criteria;

-}

-

-void GLUTAPIENTRY

-glutGameModeString(const char *string)

-{

-  Criterion *criteria;

-  int ncriteria;

-

-  initGameModeSupport();

-  criteria = parseDisplayString(string, &ncriteria);

-  currentDm = findMatch(dmodes, ndmodes, criteria, ncriteria);

-  free(criteria);

-}

-

-int GLUTAPIENTRY

-glutEnterGameMode(void)

-{

-  GLUTwindow *window;

-  int width, height;

-  Window win;

-

-  if (__glutMappedMenu) {

-    __glutFatalUsage("entering game mode not allowed while menus in use");

-  }

-  if (__glutGameModeWindow) {

-    /* Already in game mode, so blow away game mode

-       window so apps can change resolutions. */

-    window = __glutGameModeWindow;

-    /* Setting the game mode window to NULL tricks

-       the window destroy code into not undoing the

-       screen display change since we plan on immediately

-       doing another mode change. */

-    __glutGameModeWindow = NULL;

-    __glutDestroyWindow(window, window);

-  }

-

-  /* Assume default screen size until we find out if we

-     can actually change the display settings. */

-  width = __glutScreenWidth;

-  height = __glutScreenHeight;

-

-  if (currentDm) {

-#ifdef _WIN32

-    LONG status;

-    static int registered = 0;

-

-    status = ChangeDisplaySettings(&currentDm->devmode,

-      CDS_FULLSCREEN);

-    if (status == DISP_CHANGE_SUCCESSFUL) {

-      __glutDisplaySettingsChanged = 1;

-      width = currentDm->cap[DM_WIDTH];

-      height = currentDm->cap[DM_HEIGHT];

-      if (!registered) {

-        atexit(__glutCloseDownGameMode);

-        registered = 1;

-      }

-    } else {

-      /* Switch back to default resolution. */

-      ChangeDisplaySettings(NULL, 0);

-    }

-#endif

-  }

-

-  window = __glutCreateWindow(NULL, 0, 0,

-    width, height, /* game mode */ 1);

-  win = window->win;

-

-#if !defined(_WIN32) && !defined(__OS2__)

-  if (__glutMotifHints == None) {

-    __glutMotifHints = XSGIFastInternAtom(__glutDisplay, "_MOTIF_WM_HINTS",

-      SGI_XA__MOTIF_WM_HINTS, 0);

-    if (__glutMotifHints == None) {

-      __glutWarning("Could not intern X atom for _MOTIF_WM_HINTS.");

-    }

-  }

-

-  /* Game mode window is a toplevel window. */

-  XSetWMProtocols(__glutDisplay, win, &__glutWMDeleteWindow, 1);

-#endif

-

-  /* Schedule the fullscreen property to be added and to

-     make sure the window is configured right.  Win32

-     doesn't need this. */

-  window->desiredX = 0;

-  window->desiredY = 0;

-  window->desiredWidth = width;

-  window->desiredHeight = height;

-  window->desiredConfMask |= CWX | CWY | CWWidth | CWHeight;

-#ifdef _WIN32

-  /* Win32 does not want to use GLUT_FULL_SCREEN_WORK

-     for game mode because we need to be maximizing

-     the window in game mode, not just sizing it to

-     take up the full screen.  The Win32-ness of game

-     mode happens when you pass 1 in the gameMode parameter

-     to __glutCreateWindow above.  A gameMode of creates

-     a WS_POPUP window, not a standard WS_OVERLAPPEDWINDOW

-     window.  WS_POPUP ensures the taskbar is hidden. */

-  __glutPutOnWorkList(window,

-    GLUT_CONFIGURE_WORK);

-#else

-  __glutPutOnWorkList(window,

-    GLUT_CONFIGURE_WORK | GLUT_FULL_SCREEN_WORK);

-#endif

-

-  __glutGameModeWindow = window;

-  return window->num + 1;

-}

-

-int GLUTAPIENTRY

-glutGameModeGet(GLenum mode)

-{

-  switch (mode) {

-  case GLUT_GAME_MODE_ACTIVE:

-    return __glutGameModeWindow != NULL;

-  case GLUT_GAME_MODE_POSSIBLE:

-    return currentDm != NULL;

-  case GLUT_GAME_MODE_WIDTH:

-    return currentDm ? currentDm->cap[DM_WIDTH] : -1;

-  case GLUT_GAME_MODE_HEIGHT:

-    return currentDm ? currentDm->cap[DM_HEIGHT] : -1;

-  case GLUT_GAME_MODE_PIXEL_DEPTH:

-    return currentDm ? currentDm->cap[DM_PIXEL_DEPTH] : -1;

-  case GLUT_GAME_MODE_REFRESH_RATE:

-    return currentDm ? currentDm->cap[DM_HERTZ] : -1;

-  case GLUT_GAME_MODE_DISPLAY_CHANGED:

-    return __glutDisplaySettingsChanged;

-  default:

-    return -1;

-  }

-}

+
+/* Copyright (c) Mark J. Kilgard, 1998. */
+
+/* This program is freely distributable without licensing fees
+   and is provided without guarantee or warrantee expressed or
+   implied. This program is -not- in the public domain. */
+
+
+#include <assert.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "glutint.h"
+
+#if !defined(_WIN32) && !defined(__OS2__)
+#include <X11/Xlib.h>
+#include <X11/Xatom.h>
+
+/* SGI optimization introduced in IRIX 6.3 to avoid X server
+   round trips for interning common X atoms. */
+#if defined(_SGI_EXTRA_PREDEFINES) && !defined(NO_FAST_ATOMS)
+#include <X11/SGIFastAtom.h>
+#else
+#define XSGIFastInternAtom(dpy,string,fast_name,how) XInternAtom(dpy,string,how)
+#endif
+#endif  /* not _WIN32 */
+
+int __glutDisplaySettingsChanged = 0;
+static DisplayMode *dmodes, *currentDm = NULL;
+static int ndmodes = -1;
+GLUTwindow *__glutGameModeWindow = NULL;
+
+#ifdef TEST
+static char *compstr[] =
+{
+  "none", "=", "!=", "<=", ">=", ">", "<", "~"
+};
+static char *capstr[] =
+{
+  "width", "height", "bpp", "hertz", "num"
+};
+#endif
+
+#if defined(__OS2__)
+void
+#else
+void __cdecl
+#endif
+__glutCloseDownGameMode(void)
+{
+  if (__glutDisplaySettingsChanged) {
+#ifdef _WIN32
+    /* Assumes that display settings have been changed, that
+       is __glutDisplaySettingsChanged is true. */
+    ChangeDisplaySettings(NULL, 0);
+#endif
+    __glutDisplaySettingsChanged = 0;
+  }
+  __glutGameModeWindow = NULL;
+}
+
+void GLUTAPIENTRY
+glutLeaveGameMode(void)
+{
+  if (__glutGameModeWindow == NULL) {
+    __glutWarning("not in game mode so cannot leave game mode");
+    return;
+  }
+  __glutDestroyWindow(__glutGameModeWindow,
+    __glutGameModeWindow);
+  XFlush(__glutDisplay);
+  __glutGameModeWindow = NULL;
+}
+
+#ifdef _WIN32
+
+/* Same values as from MSDN's SetDisp.c example. */
+#define MIN_WIDTH 400
+#define MIN_FREQUENCY 60
+
+static void
+initGameModeSupport(void)
+{
+  DEVMODE dm;
+  DWORD mode;
+  int i;
+
+  if (ndmodes >= 0) {
+    /* ndmodes is initially -1 to indicate no
+       dmodes allocated yet. */
+    return;
+  }
+
+  /* Determine how many display modes there are. */
+  ndmodes = 0;
+  mode = 0;
+  while (EnumDisplaySettings(NULL, mode, &dm)) {
+    if (dm.dmPelsWidth >= MIN_WIDTH &&
+      (dm.dmDisplayFrequency == 0 ||
+      dm.dmDisplayFrequency >= MIN_FREQUENCY)) {
+      ndmodes++;
+    }
+    mode++;
+  }
+
+  /* Allocate memory for a list of all the display modes. */
+  dmodes = (DisplayMode*)
+    malloc(ndmodes * sizeof(DisplayMode));
+
+  /* Now that we know how many display modes to expect,
+     enumerate them again and save the information in
+     the list we allocated above. */
+  i = 0;
+  mode = 0;
+  while (EnumDisplaySettings(NULL, mode, &dm)) {
+    /* Try to reject any display settings that seem unplausible. */
+    if (dm.dmPelsWidth >= MIN_WIDTH &&
+      (dm.dmDisplayFrequency == 0 ||
+      dm.dmDisplayFrequency >= MIN_FREQUENCY)) {
+      dmodes[i].devmode = dm;
+      dmodes[i].valid = 1;  /* XXX Not used for now. */
+      dmodes[i].cap[DM_WIDTH] = dm.dmPelsWidth;
+      dmodes[i].cap[DM_HEIGHT] = dm.dmPelsHeight;
+      dmodes[i].cap[DM_PIXEL_DEPTH] = dm.dmBitsPerPel;
+      if (dm.dmDisplayFrequency == 0) {
+       /* Guess a reasonable guess. */
+       /* Lame Windows 95 version of EnumDisplaySettings. */
+        dmodes[i].cap[DM_HERTZ] = 60;
+      } else {
+       dmodes[i].cap[DM_HERTZ] = dm.dmDisplayFrequency;
+      }
+      i++;
+    }
+    mode++;
+  }
+
+  assert(i == ndmodes);
+}
+
+#else
+
+/* X Windows version of initGameModeSupport. */
+static void
+initGameModeSupport(void)
+{
+  if (ndmodes >= 0) {
+    /* ndmodes is initially -1 to indicate no
+       dmodes allocated yet. */
+    return;
+  }
+
+  /* Determine how many display modes there are. */
+  ndmodes = 0;
+}
+
+#endif
+
+/* This routine is based on similiar code in glut_dstr.c */
+static DisplayMode *
+findMatch(DisplayMode * dmodes, int ndmodes,
+  Criterion * criteria, int ncriteria)
+{
+  DisplayMode *found;
+  int *bestScore, *thisScore;
+  int i, j, numok, result = 0, worse, better;
+
+  found = NULL;
+  numok = 1;            /* "num" capability is indexed from 1,
+                           not 0. */
+
+  /* XXX alloca canidate. */
+  bestScore = (int *) malloc(ncriteria * sizeof(int));
+  if (!bestScore) {
+    __glutFatalError("out of memory.");
+  }
+  for (j = 0; j < ncriteria; j++) {
+    /* Very negative number. */
+    bestScore[j] = -32768;
+  }
+
+  /* XXX alloca canidate. */
+  thisScore = (int *) malloc(ncriteria * sizeof(int));
+  if (!thisScore) {
+    __glutFatalError("out of memory.");
+  }
+
+  for (i = 0; i < ndmodes; i++) {
+    if (dmodes[i].valid) {
+      worse = 0;
+      better = 0;
+
+      for (j = 0; j < ncriteria; j++) {
+        int cap, cvalue, dvalue;
+
+        cap = criteria[j].capability;
+        cvalue = criteria[j].value;
+        if (cap == NUM) {
+          dvalue = numok;
+        } else {
+          dvalue = dmodes[i].cap[cap];
+        }
+#ifdef TEST
+        if (verbose)
+          printf("  %s %s %d to %d\n",
+            capstr[cap], compstr[criteria[j].comparison], cvalue, dvalue);
+#endif
+        switch (criteria[j].comparison) {
+        case EQ:
+          result = cvalue == dvalue;
+          thisScore[j] = 1;
+          break;
+        case NEQ:
+          result = cvalue != dvalue;
+          thisScore[j] = 1;
+          break;
+        case LT:
+          result = dvalue < cvalue;
+          thisScore[j] = dvalue - cvalue;
+          break;
+        case GT:
+          result = dvalue > cvalue;
+          thisScore[j] = dvalue - cvalue;
+          break;
+        case LTE:
+          result = dvalue <= cvalue;
+          thisScore[j] = dvalue - cvalue;
+          break;
+        case GTE:
+          result = (dvalue >= cvalue);
+          thisScore[j] = dvalue - cvalue;
+          break;
+        case MIN:
+          result = dvalue >= cvalue;
+          thisScore[j] = cvalue - dvalue;
+          break;
+        }
+
+#ifdef TEST
+        if (verbose)
+          printf("                result=%d   score=%d   bestScore=%d\n", result, thisScore[j], bestScore[j]);
+#endif
+
+        if (result) {
+          if (better || thisScore[j] > bestScore[j]) {
+            better = 1;
+          } else if (thisScore[j] == bestScore[j]) {
+            /* Keep looking. */
+          } else {
+            goto nextDM;
+          }
+        } else {
+          if (cap == NUM) {
+            worse = 1;
+          } else {
+            goto nextDM;
+          }
+        }
+
+      }
+
+      if (better && !worse) {
+        found = &dmodes[i];
+        for (j = 0; j < ncriteria; j++) {
+          bestScore[j] = thisScore[j];
+        }
+      }
+      numok++;
+
+    nextDM:;
+
+    }
+  }
+  free(bestScore);
+  free(thisScore);
+  return found;
+}
+
+/**
+ * Parses strings in the form of:
+ *  800x600
+ *  800x600:16
+ *  800x600@60
+ *  800x600:16@60
+ *  @60
+ *  :16
+ *  :16@60
+ * NOTE that @ before : is not parsed.
+ */
+static int
+specialCaseParse(char *word, Criterion * criterion, int mask)
+{
+  char *xstr, *response;
+  int got;
+  int width, height, bpp, hertz;
+
+  switch(word[0]) {
+  case '0':
+  case '1':
+  case '2':
+  case '3':
+  case '4':
+  case '5':
+  case '6':
+  case '7':
+  case '8':
+  case '9':
+    /* The WWWxHHH case. */
+    if (mask & (1 << DM_WIDTH)) {
+      return -1;
+    }
+    xstr = strpbrk(&word[1], "x");
+    if (xstr) {
+      width = (int) strtol(word, &response, 0);
+      if (response == word || response[0] != 'x') {
+        /* Not a valid number OR needs to be followed by 'x'. */
+       return -1;
+      }
+      height = (int) strtol(&xstr[1], &response, 0);
+      if (response == &xstr[1]) {
+        /* Not a valid number. */
+       return -1;
+      }
+      criterion[0].capability = DM_WIDTH;
+      criterion[0].comparison = EQ;
+      criterion[0].value = width;
+      criterion[1].capability = DM_HEIGHT;
+      criterion[1].comparison = EQ;
+      criterion[1].value = height;
+      got = specialCaseParse(response,
+        &criterion[2], 1 << DM_WIDTH);
+      if (got >= 0) {
+        return got + 2;
+      } else {
+        return -1;
+      }
+    }
+    return -1;
+  case ':':
+    /* The :BPP case. */
+    if (mask & (1 << DM_PIXEL_DEPTH)) {
+      return -1;
+    }
+    bpp = (int) strtol(&word[1], &response, 0);
+    if (response == &word[1]) {
+      /* Not a valid number. */
+      return -1;
+    }
+    criterion[0].capability = DM_PIXEL_DEPTH;
+    criterion[0].comparison = EQ;
+    criterion[0].value = bpp;
+    got = specialCaseParse(response,
+      &criterion[1], (1 << DM_WIDTH) | (1 << DM_PIXEL_DEPTH));
+    if (got >= 0) {
+      return got + 1;
+    } else {
+      return -1;
+    }
+  case '@':
+    /* The @HZ case. */
+    if (mask & (1 << DM_HERTZ)) {
+      return -1;
+    }
+    hertz = (int) strtol(&word[1], &response, 0);
+    if (response == &word[1]) {
+      /* Not a valid number. */
+      return -1;
+    }
+    criterion[0].capability = DM_HERTZ;
+    criterion[0].comparison = EQ;
+    criterion[0].value = hertz;
+    got = specialCaseParse(response,
+      &criterion[1], ~DM_HERTZ);
+    if (got >= 0) {
+      return got + 1;
+    } else {
+      return -1;
+    }
+  case '\0':
+    return 0;
+  }
+  return -1;
+}
+
+/* This routine is based on similiar code in glut_dstr.c */
+static int
+parseCriteria(char *word, Criterion * criterion)
+{
+  char *cstr, *vstr, *response;
+  int comparator, value = 0;
+
+  cstr = strpbrk(word, "=><!~");
+  if (cstr) {
+    switch (cstr[0]) {
+    case '=':
+      comparator = EQ;
+      vstr = &cstr[1];
+      break;
+    case '~':
+      comparator = MIN;
+      vstr = &cstr[1];
+      break;
+    case '>':
+      if (cstr[1] == '=') {
+        comparator = GTE;
+        vstr = &cstr[2];
+      } else {
+        comparator = GT;
+        vstr = &cstr[1];
+      }
+      break;
+    case '<':
+      if (cstr[1] == '=') {
+        comparator = LTE;
+        vstr = &cstr[2];
+      } else {
+        comparator = LT;
+        vstr = &cstr[1];
+      }
+      break;
+    case '!':
+      if (cstr[1] == '=') {
+        comparator = NEQ;
+        vstr = &cstr[2];
+      } else {
+        return -1;
+      }
+      break;
+    default:
+      return -1;
+    }
+    value = (int) strtol(vstr, &response, 0);
+    if (response == vstr) {
+      /* Not a valid number. */
+      return -1;
+    }
+    *cstr = '\0';
+  } else {
+    comparator = NONE;
+  }
+  switch (word[0]) {
+  case 'b':
+    if (!strcmp(word, "bpp")) {
+      criterion[0].capability = DM_PIXEL_DEPTH;
+      if (comparator == NONE) {
+        return -1;
+      } else {
+        criterion[0].comparison = comparator;
+        criterion[0].value = value;
+        return 1;
+      }
+    }
+    return -1;
+  case 'h':
+    if (!strcmp(word, "height")) {
+      criterion[0].capability = DM_HEIGHT;
+      if (comparator == NONE) {
+        return -1;
+      } else {
+        criterion[0].comparison = comparator;
+        criterion[0].value = value;
+        return 1;
+      }
+    }
+    if (!strcmp(word, "hertz")) {
+      criterion[0].capability = DM_HERTZ;
+      if (comparator == NONE) {
+        return -1;
+      } else {
+        criterion[0].comparison = comparator;
+        criterion[0].value = value;
+        return 1;
+      }
+    }
+    return -1;
+  case 'n':
+    if (!strcmp(word, "num")) {
+      criterion[0].capability = DM_NUM;
+      if (comparator == NONE) {
+        return -1;
+      } else {
+        criterion[0].comparison = comparator;
+        criterion[0].value = value;
+        return 1;
+      }
+    }
+    return -1;
+  case 'w':
+    if (!strcmp(word, "width")) {
+      criterion[0].capability = DM_WIDTH;
+      if (comparator == NONE) {
+        return -1;
+      } else {
+        criterion[0].comparison = comparator;
+        criterion[0].value = value;
+        return 1;
+      }
+    }
+    return -1;
+  }
+  if (comparator == NONE) {
+    return specialCaseParse(word, criterion, 0);
+  }
+  return -1;
+}
+
+/* This routine is based on similiar code in glut_dstr.c */
+static Criterion *
+parseDisplayString(const char *display, int *ncriteria)
+{
+  Criterion *criteria = NULL;
+  int n, parsed;
+  char *copy, *word;
+
+  copy = __glutStrdup(display);
+  /* Attempt to estimate how many criteria entries should be
+     needed. */
+  n = 0;
+  word = strtok(copy, " \t");
+  while (word) {
+    n++;
+    word = strtok(NULL, " \t");
+  }
+  /* Allocate number of words of criteria.  A word
+     could contain as many as four criteria in the
+     worst case.  Example: 800x600:16@60 */
+  criteria = (Criterion *) malloc(4 * n * sizeof(Criterion));
+  if (!criteria) {
+    __glutFatalError("out of memory.");
+  }
+
+  /* Re-copy the copy of the display string. */
+  strcpy(copy, display);
+
+  n = 0;
+  word = strtok(copy, " \t");
+  while (word) {
+    parsed = parseCriteria(word, &criteria[n]);
+    if (parsed >= 0) {
+      n += parsed;
+    } else {
+      __glutWarning("Unrecognized game mode string word: %s (ignoring)\n", word);
+    }
+    word = strtok(NULL, " \t");
+  }
+
+  free(copy);
+  *ncriteria = n;
+  return criteria;
+}
+
+void GLUTAPIENTRY
+glutGameModeString(const char *string)
+{
+  Criterion *criteria;
+  int ncriteria;
+
+  initGameModeSupport();
+  criteria = parseDisplayString(string, &ncriteria);
+  currentDm = findMatch(dmodes, ndmodes, criteria, ncriteria);
+  free(criteria);
+}
+
+int GLUTAPIENTRY
+glutEnterGameMode(void)
+{
+  GLUTwindow *window;
+  int width, height;
+  Window win;
+
+  if (__glutMappedMenu) {
+    __glutFatalUsage("entering game mode not allowed while menus in use");
+  }
+  if (__glutGameModeWindow) {
+    /* Already in game mode, so blow away game mode
+       window so apps can change resolutions. */
+    window = __glutGameModeWindow;
+    /* Setting the game mode window to NULL tricks
+       the window destroy code into not undoing the
+       screen display change since we plan on immediately
+       doing another mode change. */
+    __glutGameModeWindow = NULL;
+    __glutDestroyWindow(window, window);
+  }
+
+  /* Assume default screen size until we find out if we
+     can actually change the display settings. */
+  width = __glutScreenWidth;
+  height = __glutScreenHeight;
+
+  if (currentDm) {
+#ifdef _WIN32
+    LONG status;
+    static int registered = 0;
+
+    status = ChangeDisplaySettings(&currentDm->devmode,
+      CDS_FULLSCREEN);
+    if (status == DISP_CHANGE_SUCCESSFUL) {
+      __glutDisplaySettingsChanged = 1;
+      width = currentDm->cap[DM_WIDTH];
+      height = currentDm->cap[DM_HEIGHT];
+      if (!registered) {
+        atexit(__glutCloseDownGameMode);
+        registered = 1;
+      }
+    } else {
+      /* Switch back to default resolution. */
+      ChangeDisplaySettings(NULL, 0);
+    }
+#endif
+  }
+
+  window = __glutCreateWindow(NULL, 0, 0,
+    width, height, /* game mode */ 1);
+  win = window->win;
+
+#if !defined(_WIN32) && !defined(__OS2__)
+  if (__glutMotifHints == None) {
+    __glutMotifHints = XSGIFastInternAtom(__glutDisplay, "_MOTIF_WM_HINTS",
+      SGI_XA__MOTIF_WM_HINTS, 0);
+    if (__glutMotifHints == None) {
+      __glutWarning("Could not intern X atom for _MOTIF_WM_HINTS.");
+    }
+  }
+
+  /* Game mode window is a toplevel window. */
+  XSetWMProtocols(__glutDisplay, win, &__glutWMDeleteWindow, 1);
+#endif
+
+  /* Schedule the fullscreen property to be added and to
+     make sure the window is configured right.  Win32
+     doesn't need this. */
+  window->desiredX = 0;
+  window->desiredY = 0;
+  window->desiredWidth = width;
+  window->desiredHeight = height;
+  window->desiredConfMask |= CWX | CWY | CWWidth | CWHeight;
+#ifdef _WIN32
+  /* Win32 does not want to use GLUT_FULL_SCREEN_WORK
+     for game mode because we need to be maximizing
+     the window in game mode, not just sizing it to
+     take up the full screen.  The Win32-ness of game
+     mode happens when you pass 1 in the gameMode parameter
+     to __glutCreateWindow above.  A gameMode of creates
+     a WS_POPUP window, not a standard WS_OVERLAPPEDWINDOW
+     window.  WS_POPUP ensures the taskbar is hidden. */
+  __glutPutOnWorkList(window,
+    GLUT_CONFIGURE_WORK);
+#else
+  __glutPutOnWorkList(window,
+    GLUT_CONFIGURE_WORK | GLUT_FULL_SCREEN_WORK);
+#endif
+
+  __glutGameModeWindow = window;
+  return window->num + 1;
+}
+
+int GLUTAPIENTRY
+glutGameModeGet(GLenum mode)
+{
+  switch (mode) {
+  case GLUT_GAME_MODE_ACTIVE:
+    return __glutGameModeWindow != NULL;
+  case GLUT_GAME_MODE_POSSIBLE:
+    return currentDm != NULL;
+  case GLUT_GAME_MODE_WIDTH:
+    return currentDm ? currentDm->cap[DM_WIDTH] : -1;
+  case GLUT_GAME_MODE_HEIGHT:
+    return currentDm ? currentDm->cap[DM_HEIGHT] : -1;
+  case GLUT_GAME_MODE_PIXEL_DEPTH:
+    return currentDm ? currentDm->cap[DM_PIXEL_DEPTH] : -1;
+  case GLUT_GAME_MODE_REFRESH_RATE:
+    return currentDm ? currentDm->cap[DM_HERTZ] : -1;
+  case GLUT_GAME_MODE_DISPLAY_CHANGED:
+    return __glutDisplaySettingsChanged;
+  default:
+    return -1;
+  }
+}
 
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