dlls/x11drv/xvidmode.c

   1 /*
   2  * DirectDraw XVidMode interface
   3  *
   4  * Copyright 2001 TransGaming Technologies, Inc.
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 #include "config.h"
  22 #include <string.h>
  23 #include <stdio.h>
  24
  25 #include "ts_xlib.h"
  26
  27 #ifdef HAVE_LIBXXF86VM
  28 #define XMD_H
  29 #include "basetsd.h"
  30 #include <X11/extensions/xf86vmode.h>
  31 #endif  /* HAVE_LIBXXF86VM */
  32 #include "x11drv.h"
  33
  34 #include "x11ddraw.h"
  35 #include "xvidmode.h"
  36
  37 #include "windef.h"
  38 #include "wingdi.h"
  39 #include "ddrawi.h"
  40 #include "wine/debug.h"
  41
  42 WINE_DEFAULT_DEBUG_CHANNEL(x11drv);
  43
  44 #ifdef HAVE_LIBXXF86VM
  45
  46 extern int usexvidmode;
  47
  48 static int xf86vm_event, xf86vm_error, xf86vm_major, xf86vm_minor;
  49
  50 #ifdef X_XF86VidModeSetGammaRamp
  51 static int xf86vm_gammaramp_size;
  52 static BOOL xf86vm_use_gammaramp;
  53 #endif
  54
  55 static LPDDHALMODEINFO dd_modes;
  56 static unsigned int dd_mode_count;
  57 static XF86VidModeModeInfo** real_xf86vm_modes;
  58 static unsigned int real_xf86vm_mode_count;
  59 static unsigned int xf86vm_initial_mode;
  60
  61 static void convert_modeinfo( const XF86VidModeModeInfo *mode, LPDDHALMODEINFO info, unsigned int bpp)
  62 {
  63   info->dwWidth      = mode->hdisplay;
  64   info->dwHeight     = mode->vdisplay;
  65   if (mode->htotal!=0 && mode->vtotal!=0)
  66       info->wRefreshRate = mode->dotclock * 1000 / (mode->htotal * mode->vtotal);
  67   else
  68       info->wRefreshRate = 0;
  69   TRACE(" width=%ld, height=%ld, refresh=%d\n",
  70         info->dwWidth, info->dwHeight, info->wRefreshRate);
  71   info->lPitch         = 0;
  72   info->dwBPP          = bpp;
  73   info->wFlags         = 0;
  74   info->dwRBitMask     = 0;
  75   info->dwGBitMask     = 0;
  76   info->dwBBitMask     = 0;
  77   info->dwAlphaBitMask = 0;
  78 }
  79
  80 static void convert_modeline(int dotclock, const XF86VidModeModeLine *mode, LPDDHALMODEINFO info, unsigned int bpp)
  81 {
  82   info->dwWidth      = mode->hdisplay;
  83   info->dwHeight     = mode->vdisplay;
  84   if (mode->htotal!=0 && mode->vtotal!=0)
  85       info->wRefreshRate = dotclock * 1000 / (mode->htotal * mode->vtotal);
  86   else
  87       info->wRefreshRate = 0;
  88   TRACE(" width=%ld, height=%ld, refresh=%d\n",
  89         info->dwWidth, info->dwHeight, info->wRefreshRate);
  90   info->lPitch         = 0;
  91   info->dwBPP          = bpp;
  92   info->wFlags         = 0;
  93   info->dwRBitMask     = 0;
  94   info->dwGBitMask     = 0;
  95   info->dwBBitMask     = 0;
  96   info->dwAlphaBitMask = 0;
  97 }
  98
  99 static int XVidModeErrorHandler(Display *dpy, XErrorEvent *event, void *arg)
 100 {
 101     return 1;
 102 }
 103
 104 static Bool in_desktop_mode;
 105 static const unsigned int depths[]  = {8, 16, 32};
 106
 107 void X11DRV_XF86VM_Init(void)
 108 {
 109   Bool ok;
 110   int nmodes, i, j;
 111   int max_modes;
 112   DWORD dwBpp = screen_depth;
 113   if (dwBpp == 24) dwBpp = 32;
 114
 115   in_desktop_mode = (root_window != DefaultRootWindow(gdi_display));
 116
 117   if (xf86vm_major) return; /* already initialized? */
 118
 119   if (!usexvidmode) return;
 120
 121   /* see if XVidMode is available */
 122   wine_tsx11_lock();
 123   ok = XF86VidModeQueryExtension(gdi_display, &xf86vm_event, &xf86vm_error);
 124   if (ok)
 125   {
 126       X11DRV_expect_error(gdi_display, XVidModeErrorHandler, NULL);
 127       ok = XF86VidModeQueryVersion(gdi_display, &xf86vm_major, &xf86vm_minor);
 128       if (X11DRV_check_error()) ok = FALSE;
 129   }
 130   if (ok)
 131   {
 132 #ifdef X_XF86VidModeSetGammaRamp
 133       if (xf86vm_major > 2 || (xf86vm_major == 2 && xf86vm_minor >= 1))
 134       {
 135           XF86VidModeGetGammaRampSize(gdi_display, DefaultScreen(gdi_display),
 136                                       &xf86vm_gammaramp_size);
 137           if (xf86vm_gammaramp_size == 256)
 138               xf86vm_use_gammaramp = TRUE;
 139       }
 140 #endif
 141
 142       /* retrieve modes */
 143       if (!in_desktop_mode) ok = XF86VidModeGetAllModeLines(gdi_display, DefaultScreen(gdi_display), &nmodes, &real_xf86vm_modes);
 144   }
 145   wine_tsx11_unlock();
 146   if (!ok) return;
 147
 148   /* In desktop mode, do not switch resolution... But still use the Gamma ramp stuff */
 149   if (in_desktop_mode) return;
 150
 151   TRACE("XVidMode modes: count=%d\n", nmodes);
 152
 153   real_xf86vm_mode_count = nmodes;
 154   max_modes = (3+1)*(nmodes);
 155
 156   dd_modes = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(DDHALMODEINFO) * max_modes);
 157
 158   /* convert modes to DDHALMODEINFO format */
 159   for (i=0; i<real_xf86vm_mode_count; i++)
 160   {
 161       convert_modeinfo(real_xf86vm_modes[i], &dd_modes[dd_mode_count++], dwBpp);
 162   }
 163   /* add modes for different color depths */
 164   for (j=0; j<3; j++)
 165   {
 166       if (depths[j] != dwBpp)
 167       {
 168           for (i=0; i < real_xf86vm_mode_count; i++)
 169           {
 170               convert_modeinfo(real_xf86vm_modes[i], &dd_modes[dd_mode_count++], depths[j]);
 171           }
 172       }
 173   }
 174
 175   TRACE("Available DD modes: count=%d\n", dd_mode_count);
 176
 177   /* store the current mode at the time we started */
 178   xf86vm_initial_mode = X11DRV_XF86VM_GetCurrentMode();
 179
 180   TRACE("Enabling XVidMode\n");
 181 }
 182
 183 void X11DRV_XF86VM_Cleanup(void)
 184 {
 185   if (real_xf86vm_modes) TSXFree(real_xf86vm_modes);
 186 }
 187
 188 int X11DRV_XF86VM_GetCurrentMode(void)
 189 {
 190   XF86VidModeModeLine line;
 191   int dotclock, i;
 192   DDHALMODEINFO cmode;
 193   DWORD dwBpp = screen_depth;
 194   if (dwBpp == 24) dwBpp = 32;
 195
 196   if (!dd_modes) return 0; /* no XVidMode */
 197
 198   TRACE("Querying XVidMode current mode\n");
 199   wine_tsx11_lock();
 200   XF86VidModeGetModeLine(gdi_display, DefaultScreen(gdi_display), &dotclock, &line);
 201   wine_tsx11_unlock();
 202   convert_modeline(dotclock, &line, &cmode, dwBpp);
 203   for (i=0; i<dd_mode_count; i++)
 204     if (memcmp(&dd_modes[i], &cmode, sizeof(cmode)) == 0) {
 205       TRACE("mode=%d\n", i);
 206       return i;
 207     }
 208   ERR("unknown mode, shouldn't happen\n");
 209   return 0; /* return first mode */
 210 }
 211
 212 void X11DRV_XF86VM_SetCurrentMode(int mode)
 213 {
 214   if (!dd_modes) return; /* no XVidMode */
 215
 216   /* only set modes from the original color depth */
 217   mode = mode % real_xf86vm_mode_count;
 218
 219   wine_tsx11_lock();
 220   TRACE("Resizing X display to %dx%d\n",
 221         real_xf86vm_modes[mode]->hdisplay, real_xf86vm_modes[mode]->vdisplay);
 222   XF86VidModeSwitchToMode(gdi_display, DefaultScreen(gdi_display), real_xf86vm_modes[mode]);
 223 #if 0 /* FIXME */
 224   SYSMETRICS_Set( SM_CXSCREEN, real_xf86vm_modes[mode]->hdisplay );
 225   SYSMETRICS_Set( SM_CYSCREEN, real_xf86vm_modes[mode]->vdisplay );
 226 #else
 227   FIXME("Need to update SYSMETRICS after resizing display (now %dx%d)\n",
 228         real_xf86vm_modes[mode]->hdisplay, real_xf86vm_modes[mode]->vdisplay);
 229 #endif
 230 #if 0 /* it is said that SetViewPort causes problems with some X servers */
 231   XF86VidModeSetViewPort(gdi_display, DefaultScreen(gdi_display), 0, 0);
 232 #else
 233   XWarpPointer(gdi_display, None, DefaultRootWindow(gdi_display), 0, 0, 0, 0, 0, 0);
 234 #endif
 235   XSync(gdi_display, False);
 236   wine_tsx11_unlock();
 237 }
 238
 239 void X11DRV_XF86VM_SetExclusiveMode(int lock)
 240 {
 241   if (!dd_modes) return; /* no XVidMode */
 242
 243   wine_tsx11_lock();
 244   XF86VidModeLockModeSwitch(gdi_display, DefaultScreen(gdi_display), lock);
 245   wine_tsx11_unlock();
 246 }
 247
 248 /* actual DirectDraw HAL stuff */
 249
 250 static DWORD PASCAL X11DRV_XF86VM_SetMode(LPDDHAL_SETMODEDATA data)
 251 {
 252   TRACE("Mode %ld requested by DDHAL\n", data->dwModeIndex);
 253   X11DRV_XF86VM_SetCurrentMode(data->dwModeIndex);
 254   X11DRV_DDHAL_SwitchMode(data->dwModeIndex, NULL, NULL);
 255   data->ddRVal = DD_OK;
 256   return DDHAL_DRIVER_HANDLED;
 257 }
 258
 259 int X11DRV_XF86VM_CreateDriver(LPDDHALINFO info)
 260 {
 261   if (!dd_mode_count) return 0; /* no XVidMode */
 262
 263   TRACE("Setting up XF86VM mode for DDRAW\n");
 264   info->dwNumModes = dd_mode_count;
 265   info->lpModeInfo = dd_modes;
 266   X11DRV_DDHAL_SwitchMode(X11DRV_XF86VM_GetCurrentMode(), NULL, NULL);
 267   info->lpDDCallbacks->SetMode = X11DRV_XF86VM_SetMode;
 268   return TRUE;
 269 }
 270
 271
 272 /***** GAMMA CONTROL *****/
 273 /* (only available in XF86VidMode 2.x) */
 274
 275 #ifdef X_XF86VidModeSetGamma
 276
 277 static void GenerateRampFromGamma(WORD ramp[256], float gamma)
 278 {
 279   float r_gamma = 1/gamma;
 280   unsigned i;
 281   TRACE("gamma is %f\n", r_gamma);
 282   for (i=0; i<256; i++)
 283     ramp[i] = pow(i/255.0, r_gamma) * 65535.0;
 284 }
 285
 286 static BOOL ComputeGammaFromRamp(WORD ramp[256], float *gamma)
 287 {
 288   float r_x, r_y, r_lx, r_ly, r_d, r_v, r_e, g_avg, g_min, g_max;
 289   unsigned i, f, l, g_n, c;
 290   f = ramp[0];
 291   l = ramp[255];
 292   if (f >= l) {
 293     ERR("inverted or flat gamma ramp (%d->%d), rejected\n", f, l);
 294     return FALSE;
 295   }
 296   r_d = l - f;
 297   g_min = g_max = g_avg = 0.0;
 298   /* check gamma ramp entries to estimate the gamma */
 299   TRACE("analyzing gamma ramp (%d->%d)\n", f, l);
 300   for (i=1, g_n=0; i<255; i++) {
 301     if (ramp[i] < f || ramp[i] > l) {
 302       ERR("strange gamma ramp ([%d]=%d for %d->%d), rejected\n", i, ramp[i], f, l);
 303       return FALSE;
 304     }
 305     c = ramp[i] - f;
 306     if (!c) continue; /* avoid log(0) */
 307
 308     /* normalize entry values into 0..1 range */
 309     r_x = i/255.0; r_y = c / r_d;
 310     /* compute logarithms of values */
 311     r_lx = log(r_x); r_ly = log(r_y);
 312     /* compute gamma for this entry */
 313     r_v = r_ly / r_lx;
 314     /* compute differential (error estimate) for this entry */
 315     /* some games use table-based logarithms that magnifies the error by 128 */
 316     r_e = -r_lx * 128 / (c * r_lx * r_lx);
 317
 318     /* compute min & max while compensating for estimated error */
 319     if (!g_n || g_min > (r_v + r_e)) g_min = r_v + r_e;
 320     if (!g_n || g_max < (r_v - r_e)) g_max = r_v - r_e;
 321
 322     /* add to average */
 323     g_avg += r_v;
 324     g_n++;
 325     /* TRACE("[%d]=%d, gamma=%f, error=%f\n", i, ramp[i], r_v, r_e); */
 326   }
 327   if (!g_n) {
 328     ERR("no gamma data, shouldn't happen\n");
 329     return FALSE;
 330   }
 331   g_avg /= g_n;
 332   TRACE("low bias is %d, high is %d, gamma is %5.3f\n", f, 65535-l, g_avg);
 333   /* the bias could be because the app wanted something like a "red shift"
 334    * like when you're hit in Quake, but XVidMode doesn't support it,
 335    * so we have to reject a significant bias */
 336   if (f && f > (pow(1/255.0, g_avg) * 65536.0)) {
 337     ERR("low-biased gamma ramp (%d), rejected\n", f);
 338     return FALSE;
 339   }
 340   /* check that the gamma is reasonably uniform across the ramp */
 341   if (g_max - g_min > 0.1) {
 342     ERR("ramp not uniform (max=%f, min=%f, avg=%f), rejected\n", g_max, g_min, g_avg);
 343     return FALSE;
 344   }
 345   /* ok, now we're pretty sure we can set the desired gamma ramp,
 346    * so go for it */
 347   *gamma = 1/g_avg;
 348   return TRUE;
 349 }
 350
 351 #endif /* X_XF86VidModeSetGamma */
 352
 353 /* Hmm... should gamma control be available in desktop mode or not?
 354  * I'll assume that it should */
 355
 356 BOOL X11DRV_XF86VM_GetGammaRamp(LPDDGAMMARAMP ramp)
 357 {
 358 #ifdef X_XF86VidModeSetGamma
 359   XF86VidModeGamma gamma;
 360   Bool ret;
 361
 362   if (xf86vm_major < 2) return FALSE; /* no gamma control */
 363 #ifdef X_XF86VidModeSetGammaRamp
 364   else if (xf86vm_use_gammaramp)
 365   {
 366       Bool ret;
 367       wine_tsx11_lock();
 368       ret = XF86VidModeGetGammaRamp(gdi_display, DefaultScreen(gdi_display), 256,
 369                                     ramp->red, ramp->green, ramp->blue);
 370       wine_tsx11_unlock();
 371       return ret;
 372   }
 373 #endif
 374   else
 375   {
 376       wine_tsx11_lock();
 377       ret = XF86VidModeGetGamma(gdi_display, DefaultScreen(gdi_display), &gamma);
 378       wine_tsx11_unlock();
 379       if (ret) {
 380           GenerateRampFromGamma(ramp->red,   gamma.red);
 381           GenerateRampFromGamma(ramp->green, gamma.green);
 382           GenerateRampFromGamma(ramp->blue,  gamma.blue);
 383           return TRUE;
 384       }
 385   }
 386 #endif /* X_XF86VidModeSetGamma */
 387   return FALSE;
 388 }
 389
 390 BOOL X11DRV_XF86VM_SetGammaRamp(LPDDGAMMARAMP ramp)
 391 {
 392 #ifdef X_XF86VidModeSetGamma
 393   XF86VidModeGamma gamma;
 394
 395   if (xf86vm_major < 2) return FALSE; /* no gamma control */
 396 #ifdef X_XF86VidModeSetGammaRamp
 397   else if (xf86vm_use_gammaramp)
 398   {
 399       Bool ret;
 400       wine_tsx11_lock();
 401       ret = XF86VidModeSetGammaRamp(gdi_display, DefaultScreen(gdi_display), 256,
 402                                     ramp->red, ramp->green, ramp->blue);
 403       wine_tsx11_unlock();
 404       return ret;
 405   }
 406 #endif
 407   else
 408   {
 409       if (ComputeGammaFromRamp(ramp->red,   &gamma.red) &&
 410           ComputeGammaFromRamp(ramp->green, &gamma.green) &&
 411           ComputeGammaFromRamp(ramp->blue,  &gamma.blue)) {
 412           Bool ret;
 413           wine_tsx11_lock();
 414           ret = XF86VidModeSetGamma(gdi_display, DefaultScreen(gdi_display), &gamma);
 415           wine_tsx11_unlock();
 416           return ret;
 417       }
 418   }
 419 #endif /* X_XF86VidModeSetGamma */
 420   return FALSE;
 421 }
 422
 423 #endif /* HAVE_LIBXXF86VM */
 424
 425 /***********************************************************************
 426  *              GetDeviceGammaRamp (X11DRV.@)
 427  *
 428  * FIXME: should move to somewhere appropriate, but probably not before
 429  * the stuff in graphics/x11drv/ has been moved to dlls/x11drv, so that
 430  * they can include xvidmode.h directly
 431  */
 432 BOOL X11DRV_GetDeviceGammaRamp(X11DRV_PDEVICE *physDev, LPVOID ramp)
 433 {
 434 #ifdef HAVE_LIBXXF86VM
 435   return X11DRV_XF86VM_GetGammaRamp(ramp);
 436 #else
 437   return FALSE;
 438 #endif
 439 }
 440
 441 /***********************************************************************
 442  *              SetDeviceGammaRamp (X11DRV.@)
 443  *
 444  * FIXME: should move to somewhere appropriate, but probably not before
 445  * the stuff in graphics/x11drv/ has been moved to dlls/x11drv, so that
 446  * they can include xvidmode.h directly
 447  */
 448 BOOL X11DRV_SetDeviceGammaRamp(X11DRV_PDEVICE *physDev, LPVOID ramp)
 449 {
 450 #ifdef HAVE_LIBXXF86VM
 451   return X11DRV_XF86VM_SetGammaRamp(ramp);
 452 #else
 453   return FALSE;
 454 #endif
 455 }
 456
 457 /* implementation of EnumDisplaySettings for XF86VM */
 458 BOOL X11DRV_XF86VM_EnumDisplaySettingsExW( LPCWSTR name, DWORD n, LPDEVMODEW devmode, DWORD flags)
 459 {
 460     DWORD dwBpp = screen_depth;
 461     if (dwBpp == 24) dwBpp = 32;
 462     devmode->dmDisplayFlags = 0;
 463     devmode->dmDisplayFrequency = 85;
 464     devmode->dmSize = sizeof(DEVMODEW);
 465     if (n == (DWORD)-1)
 466     {
 467         TRACE("mode %ld (current) -- getting current mode\n", n);
 468         n = X11DRV_XF86VM_GetCurrentMode();
 469     }
 470     if (n == (DWORD)-2)
 471     {
 472         devmode->dmBitsPerPel = dwBpp;
 473         devmode->dmPelsHeight = GetSystemMetrics(SM_CYSCREEN);
 474         devmode->dmPelsWidth  = GetSystemMetrics(SM_CXSCREEN);
 475         devmode->dmFields = (DM_PELSWIDTH|DM_PELSHEIGHT|DM_BITSPERPEL);
 476         TRACE("mode %ld (registry) -- returning default %ldx%ldx%ldbpp\n", n,
 477               devmode->dmPelsWidth, devmode->dmPelsHeight, devmode->dmBitsPerPel);
 478         return TRUE;
 479     }
 480     if (n < dd_mode_count)
 481     {
 482         devmode->dmPelsWidth = dd_modes[n].dwWidth;
 483         devmode->dmPelsHeight = dd_modes[n].dwHeight;
 484         devmode->dmBitsPerPel = dd_modes[n].dwBPP;
 485         devmode->dmDisplayFrequency = dd_modes[n].wRefreshRate;
 486         devmode->dmFields = (DM_PELSWIDTH|DM_PELSHEIGHT|DM_BITSPERPEL|DM_DISPLAYFREQUENCY);
 487         TRACE("mode %ld -- %ldx%ldx%ldbpp %ld Hz\n", n,
 488               devmode->dmPelsWidth, devmode->dmPelsHeight, devmode->dmBitsPerPel,
 489               devmode->dmDisplayFrequency);
 490         return TRUE;
 491     }
 492     TRACE("mode %ld -- not present\n", n);
 493     return FALSE;
 494 }
 495
 496 /* implementation of ChangeDisplaySettings for XF86VM */
 497 LONG X11DRV_XF86VM_ChangeDisplaySettingsExW( LPCWSTR devname, LPDEVMODEW devmode,
 498                                       HWND hwnd, DWORD flags, LPVOID lpvoid )
 499 {
 500     DWORD i;
 501     DWORD dwBpp = screen_depth;
 502     if (dwBpp == 24) dwBpp = 32;
 503     if (devmode==NULL)
 504     {
 505 #ifdef HAVE_LIBXXF86VM
 506         X11DRV_XF86VM_SetCurrentMode(xf86vm_initial_mode);
 507 #endif
 508         return DISP_CHANGE_SUCCESSFUL;
 509     }
 510
 511 #if 0 /* FIXME: only works if we update SYSMETRICS */
 512     if ((!(devmode->dmFields & DM_BITSPERPEL) || devmode->dmBitsPerPel == dwBpp) &&
 513         (!(devmode->dmFields & DM_PELSWIDTH)  || devmode->dmPelsWidth  == GetSystemMetrics(SM_CXSCREEN)) &&
 514         (!(devmode->dmFields & DM_PELSHEIGHT) || devmode->dmPelsHeight == GetSystemMetrics(SM_CYSCREEN)))
 515     {
 516         /* we have a valid mode */
 517         TRACE("Requested mode matches current mode -- no change!\n");
 518         return DISP_CHANGE_SUCCESSFUL;
 519     }
 520 #endif
 521
 522 #ifdef HAVE_LIBXXF86VM
 523     for (i = 0; i < dd_mode_count; i++)
 524     {
 525         if (devmode->dmFields & DM_BITSPERPEL)
 526         {
 527             if (devmode->dmBitsPerPel != dd_modes[i].dwBPP)
 528                 continue;
 529         }
 530         if (devmode->dmFields & DM_PELSWIDTH)
 531         {
 532             if (devmode->dmPelsWidth != dd_modes[i].dwWidth)
 533                 continue;
 534         }
 535         if (devmode->dmFields & DM_PELSHEIGHT)
 536         {
 537             if (devmode->dmPelsHeight != dd_modes[i].dwHeight)
 538                 continue;
 539         }
 540         if (devmode->dmFields & DM_DISPLAYFREQUENCY)
 541         {
 542             if (devmode->dmDisplayFrequency != dd_modes[i].wRefreshRate)
 543                 continue;
 544         }
 545         /* we have a valid mode */
 546         TRACE("Requested display settings match mode %ld\n", i);
 547         X11DRV_XF86VM_SetCurrentMode(i);
 548         if (dwBpp != dd_modes[i].dwBPP)
 549         {
 550             FIXME("Cannot change screen BPP from %ld to %ld\n", dwBpp, dd_modes[i].dwBPP);
 551         }
 552         return DISP_CHANGE_SUCCESSFUL;
 553     }
 554 #endif
 555
 556     /* no valid modes found */
 557     ERR("No matching mode found!\n");
 558     return DISP_CHANGE_BADMODE;
 559 }
 560
 561 /* implementation of EnumDisplaySettings for nores */
 562 BOOL X11DRV_nores_EnumDisplaySettingsExW( LPCWSTR name, DWORD n, LPDEVMODEW devmode, DWORD flags)
 563 {
 564     DWORD dwBpp = screen_depth;
 565     if (dwBpp == 24) dwBpp = 32;
 566     devmode->dmDisplayFlags = 0;
 567     devmode->dmDisplayFrequency = 85;
 568     devmode->dmSize = sizeof(DEVMODEW);
 569     if (n==0 || n == (DWORD)-1 || n == (DWORD)-2)
 570     {
 571         devmode->dmBitsPerPel = dwBpp;
 572         devmode->dmPelsHeight = GetSystemMetrics(SM_CYSCREEN);
 573         devmode->dmPelsWidth  = GetSystemMetrics(SM_CXSCREEN);
 574         devmode->dmFields = (DM_PELSWIDTH|DM_PELSHEIGHT|DM_BITSPERPEL);
 575         TRACE("mode %ld -- returning default %ldx%ldx%ldbpp\n", n,
 576               devmode->dmPelsWidth, devmode->dmPelsHeight, devmode->dmBitsPerPel);
 577         return TRUE;
 578     }
 579     TRACE("mode %ld -- not present\n", n);
 580     return FALSE;
 581 }
 582
 583 /* implementation of ChangeDisplaySettings for nores */
 584 LONG X11DRV_nores_ChangeDisplaySettingsExW( LPCWSTR devname, LPDEVMODEW devmode,
 585                                             HWND hwnd, DWORD flags, LPVOID lpvoid )
 586 {
 587     DWORD dwBpp = screen_depth;
 588     if (dwBpp == 24) dwBpp = 32;
 589     if (devmode==NULL)
 590     {
 591         return DISP_CHANGE_SUCCESSFUL;
 592     }
 593
 594     if ((!(devmode->dmFields & DM_BITSPERPEL) || devmode->dmBitsPerPel == dwBpp) &&
 595         (!(devmode->dmFields & DM_PELSWIDTH)  || devmode->dmPelsWidth  == GetSystemMetrics(SM_CXSCREEN)) &&
 596         (!(devmode->dmFields & DM_PELSHEIGHT) || devmode->dmPelsHeight == GetSystemMetrics(SM_CYSCREEN)))
 597     {
 598         /* we are in the desired mode */
 599         TRACE("Requested mode matches current mode -- no change!\n");
 600         return DISP_CHANGE_SUCCESSFUL;
 601     }
 602
 603     /* no valid modes found */
 604     ERR("No matching mode found!\n");
 605     return DISP_CHANGE_BADMODE;
 606 }
 607
 608 /***********************************************************************
 609  *              EnumDisplaySettingsExW  (X11DRV.@)
 610  *
 611  * FIXME: should move to somewhere appropriate
 612  */
 613 BOOL X11DRV_EnumDisplaySettingsExW( LPCWSTR name, DWORD n, LPDEVMODEW devmode, DWORD flags)
 614 {
 615     if (dd_modes)
 616     {
 617         /* XVidMode */
 618         return X11DRV_XF86VM_EnumDisplaySettingsExW(name, n, devmode, flags);
 619     }
 620     else if (in_desktop_mode)
 621     {
 622         /* desktop */
 623         return X11DRV_desktop_EnumDisplaySettingsExW(name, n, devmode, flags);
 624     }
 625     else
 626     {
 627         /* no resolution changing */
 628         return X11DRV_nores_EnumDisplaySettingsExW(name, n, devmode, flags);
 629     }
 630 }
 631
 632 #define _X_FIELD(prefix, bits) if ((fields) & prefix##_##bits) {p+=sprintf(p, "%s%s", first ? "" : ",", #bits); first=FALSE;}
 633 static const char * _CDS_flags(DWORD fields)
 634 {
 635     BOOL first = TRUE;
 636     char buf[128];
 637     char *p = buf;
 638     _X_FIELD(CDS,UPDATEREGISTRY);_X_FIELD(CDS,TEST);_X_FIELD(CDS,FULLSCREEN);
 639     _X_FIELD(CDS,GLOBAL);_X_FIELD(CDS,SET_PRIMARY);_X_FIELD(CDS,RESET);
 640     _X_FIELD(CDS,SETRECT);_X_FIELD(CDS,NORESET);
 641     *p = 0;
 642     return wine_dbg_sprintf("%s", buf);
 643 }
 644 static const char * _DM_fields(DWORD fields)
 645 {
 646     BOOL first = TRUE;
 647     char buf[128];
 648     char *p = buf;
 649     _X_FIELD(DM,BITSPERPEL);_X_FIELD(DM,PELSWIDTH);_X_FIELD(DM,PELSHEIGHT);
 650     _X_FIELD(DM,DISPLAYFLAGS);_X_FIELD(DM,DISPLAYFREQUENCY);_X_FIELD(DM,POSITION);
 651     *p = 0;
 652     return wine_dbg_sprintf("%s", buf);
 653 }
 654 #undef _X_FIELD
 655
 656 /***********************************************************************
 657  *              ChangeDisplaySettingsExW  (X11DRV.@)
 658  *
 659  * FIXME: should move to somewhere appropriate
 660  */
 661 LONG X11DRV_ChangeDisplaySettingsExW( LPCWSTR devname, LPDEVMODEW devmode,
 662                                       HWND hwnd, DWORD flags, LPVOID lpvoid )
 663 {
 664     TRACE("(%s,%p,%p,0x%08lx,%p\n",debugstr_w(devname),devmode,hwnd,flags,lpvoid);
 665     TRACE("flags=%s\n",_CDS_flags(flags));
 666     if (devmode)
 667     {
 668         TRACE("DM_fields=%s\n",_DM_fields(devmode->dmFields));
 669         TRACE("width=%ld height=%ld bpp=%ld freq=%ld\n",
 670               devmode->dmPelsWidth,devmode->dmPelsHeight,
 671               devmode->dmBitsPerPel,devmode->dmDisplayFrequency);
 672     }
 673     else
 674     {
 675         TRACE("Return to original display mode\n");
 676     }
 677     if (dd_modes)
 678     {
 679         /* XVidMode */
 680         return X11DRV_XF86VM_ChangeDisplaySettingsExW( devname, devmode,
 681                                                        hwnd, flags, lpvoid );
 682     }
 683     else if (in_desktop_mode)
 684     {
 685         /* no XVidMode */
 686         return X11DRV_desktop_ChangeDisplaySettingsExW( devname, devmode,
 687                                                         hwnd, flags, lpvoid );
 688     }
 689     else
 690     {
 691         /* no resolution changing */
 692         return X11DRV_nores_ChangeDisplaySettingsExW( devname, devmode,
 693                                                       hwnd, flags, lpvoid );
 694     }
 695 }