dlls/winex11.drv/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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  */
  20
  21 #include "config.h"
  22 #include <string.h>
  23 #include <stdio.h>
  24 #include <math.h>
  25
  26 #include "x11drv.h"
  27
  28 #ifdef HAVE_LIBXXF86VM
  29 #include <X11/extensions/xf86vmode.h>
  30 #endif /* HAVE_LIBXXF86VM */
  31
  32 #include "xvidmode.h"
  33
  34 #include "windef.h"
  35 #include "wingdi.h"
  36 #include "ddrawi.h"
  37 #include "wine/debug.h"
  38
  39 WINE_DEFAULT_DEBUG_CHANNEL(xvidmode);
  40
  41 #ifdef HAVE_LIBXXF86VM
  42
  43 extern int usexvidmode;
  44
  45 static int xf86vm_event, xf86vm_error, xf86vm_major, xf86vm_minor;
  46
  47 #ifdef X_XF86VidModeSetGammaRamp
  48 static int xf86vm_gammaramp_size;
  49 static BOOL xf86vm_use_gammaramp;
  50 #endif /* X_XF86VidModeSetGammaRamp */
  51
  52 static LPDDHALMODEINFO dd_modes;
  53 static unsigned int dd_mode_count;
  54 static XF86VidModeModeInfo** real_xf86vm_modes;
  55 static unsigned int real_xf86vm_mode_count;
  56
  57 static void convert_modeinfo( const XF86VidModeModeInfo *mode)
  58 {
  59   int rate;
  60   if (mode->htotal!=0 && mode->vtotal!=0)
  61       rate = mode->dotclock * 1000 / (mode->htotal * mode->vtotal);
  62   else
  63       rate = 0;
  64   X11DRV_Settings_AddOneMode(mode->hdisplay, mode->vdisplay, 0, rate);
  65 }
  66
  67 static void convert_modeline(int dotclock, const XF86VidModeModeLine *mode, LPDDHALMODEINFO info, unsigned int bpp)
  68 {
  69   info->dwWidth      = mode->hdisplay;
  70   info->dwHeight     = mode->vdisplay;
  71   if (mode->htotal!=0 && mode->vtotal!=0)
  72       info->wRefreshRate = dotclock * 1000 / (mode->htotal * mode->vtotal);
  73   else
  74       info->wRefreshRate = 0;
  75   TRACE(" width=%d, height=%d, refresh=%d\n",
  76         info->dwWidth, info->dwHeight, info->wRefreshRate);
  77   info->lPitch         = 0;
  78   info->dwBPP          = bpp;
  79   info->wFlags         = 0;
  80   info->dwRBitMask     = 0;
  81   info->dwGBitMask     = 0;
  82   info->dwBBitMask     = 0;
  83   info->dwAlphaBitMask = 0;
  84 }
  85
  86 static int XVidModeErrorHandler(Display *dpy, XErrorEvent *event, void *arg)
  87 {
  88     return 1;
  89 }
  90
  91 static int X11DRV_XF86VM_GetCurrentMode(void)
  92 {
  93   XF86VidModeModeLine line;
  94   int dotclock;
  95   unsigned int i;
  96   DDHALMODEINFO cmode;
  97   DWORD dwBpp = screen_depth;
  98   if (dwBpp == 24) dwBpp = 32;
  99
 100   TRACE("Querying XVidMode current mode\n");
 101   wine_tsx11_lock();
 102   XF86VidModeGetModeLine(gdi_display, DefaultScreen(gdi_display), &dotclock, &line);
 103   wine_tsx11_unlock();
 104   convert_modeline(dotclock, &line, &cmode, dwBpp);
 105   for (i=0; i<dd_mode_count; i++)
 106     if (memcmp(&dd_modes[i], &cmode, sizeof(cmode)) == 0) {
 107       TRACE("mode=%d\n", i);
 108       return i;
 109     }
 110   ERR("In unknown mode, returning default\n");
 111   return 0;
 112 }
 113
 114 static void X11DRV_XF86VM_SetCurrentMode(int mode)
 115 {
 116   DWORD dwBpp = screen_depth;
 117   if (dwBpp == 24) dwBpp = 32;
 118   /* only set modes from the original color depth */
 119   if (dwBpp != dd_modes[mode].dwBPP)
 120   {
 121       FIXME("Cannot change screen BPP from %d to %d\n", dwBpp, dd_modes[mode].dwBPP);
 122   }
 123   mode = mode % real_xf86vm_mode_count;
 124
 125   wine_tsx11_lock();
 126   TRACE("Resizing X display to %dx%d\n",
 127         real_xf86vm_modes[mode]->hdisplay, real_xf86vm_modes[mode]->vdisplay);
 128   XF86VidModeSwitchToMode(gdi_display, DefaultScreen(gdi_display), real_xf86vm_modes[mode]);
 129 #if 0 /* it is said that SetViewPort causes problems with some X servers */
 130   XF86VidModeSetViewPort(gdi_display, DefaultScreen(gdi_display), 0, 0);
 131 #else
 132   XWarpPointer(gdi_display, None, DefaultRootWindow(gdi_display), 0, 0, 0, 0, 0, 0);
 133 #endif
 134   XSync(gdi_display, False);
 135   wine_tsx11_unlock();
 136   X11DRV_handle_desktop_resize( real_xf86vm_modes[mode]->hdisplay,
 137                                 real_xf86vm_modes[mode]->vdisplay );
 138 }
 139
 140 void X11DRV_XF86VM_Init(void)
 141 {
 142   Bool ok;
 143   int nmodes;
 144   unsigned int i;
 145   DWORD dwBpp = screen_depth;
 146   if (dwBpp == 24) dwBpp = 32;
 147
 148   if (xf86vm_major) return; /* already initialized? */
 149
 150   /* see if XVidMode is available */
 151   wine_tsx11_lock();
 152   ok = XF86VidModeQueryExtension(gdi_display, &xf86vm_event, &xf86vm_error);
 153   if (ok)
 154   {
 155       X11DRV_expect_error(gdi_display, XVidModeErrorHandler, NULL);
 156       ok = XF86VidModeQueryVersion(gdi_display, &xf86vm_major, &xf86vm_minor);
 157       if (X11DRV_check_error()) ok = FALSE;
 158   }
 159   if (ok)
 160   {
 161 #ifdef X_XF86VidModeSetGammaRamp
 162       if (xf86vm_major > 2 || (xf86vm_major == 2 && xf86vm_minor >= 1))
 163       {
 164           XF86VidModeGetGammaRampSize(gdi_display, DefaultScreen(gdi_display),
 165                                       &xf86vm_gammaramp_size);
 166           if (xf86vm_gammaramp_size == 256)
 167               xf86vm_use_gammaramp = TRUE;
 168       }
 169 #endif /* X_XF86VidModeSetGammaRamp */
 170
 171       /* retrieve modes */
 172       if (usexvidmode && root_window == DefaultRootWindow( gdi_display ))
 173           ok = XF86VidModeGetAllModeLines(gdi_display, DefaultScreen(gdi_display), &nmodes, &real_xf86vm_modes);
 174       else
 175           ok = FALSE; /* In desktop mode, do not switch resolution... But still use the Gamma ramp stuff */
 176   }
 177   wine_tsx11_unlock();
 178   if (!ok) return;
 179
 180   TRACE("XVidMode modes: count=%d\n", nmodes);
 181
 182   real_xf86vm_mode_count = nmodes;
 183
 184   dd_modes = X11DRV_Settings_SetHandlers("XF86VidMode",
 185                                          X11DRV_XF86VM_GetCurrentMode,
 186                                          X11DRV_XF86VM_SetCurrentMode,
 187                                          nmodes, 1);
 188
 189   /* convert modes to DDHALMODEINFO format */
 190   for (i=0; i<real_xf86vm_mode_count; i++)
 191   {
 192       convert_modeinfo(real_xf86vm_modes[i]);
 193   }
 194   /* add modes for different color depths */
 195   X11DRV_Settings_AddDepthModes();
 196   dd_mode_count = X11DRV_Settings_GetModeCount();
 197
 198   TRACE("Available DD modes: count=%d\n", dd_mode_count);
 199
 200   /* the first mode in the list seems to be the default */
 201   X11DRV_Settings_SetDefaultMode(0);
 202
 203   TRACE("Enabling XVidMode\n");
 204 }
 205
 206 void X11DRV_XF86VM_Cleanup(void)
 207 {
 208   wine_tsx11_lock();
 209   if (real_xf86vm_modes) XFree(real_xf86vm_modes);
 210   wine_tsx11_unlock();
 211 }
 212
 213 void X11DRV_XF86VM_SetExclusiveMode(int lock)
 214 {
 215   if (!dd_modes) return; /* no XVidMode */
 216
 217   wine_tsx11_lock();
 218   XF86VidModeLockModeSwitch(gdi_display, DefaultScreen(gdi_display), lock);
 219   wine_tsx11_unlock();
 220 }
 221
 222 /***** GAMMA CONTROL *****/
 223 /* (only available in XF86VidMode 2.x) */
 224
 225 #ifdef X_XF86VidModeSetGamma
 226
 227 static void GenerateRampFromGamma(WORD ramp[256], float gamma)
 228 {
 229   float r_gamma = 1/gamma;
 230   unsigned i;
 231   TRACE("gamma is %f\n", r_gamma);
 232   for (i=0; i<256; i++)
 233     ramp[i] = pow(i/255.0, r_gamma) * 65535.0;
 234 }
 235
 236 static BOOL ComputeGammaFromRamp(WORD ramp[256], float *gamma)
 237 {
 238   float r_x, r_y, r_lx, r_ly, r_d, r_v, r_e, g_avg, g_min, g_max;
 239   unsigned i, f, l, g_n, c;
 240   f = ramp[0];
 241   l = ramp[255];
 242   if (f >= l) {
 243     ERR("inverted or flat gamma ramp (%d->%d), rejected\n", f, l);
 244     return FALSE;
 245   }
 246   r_d = l - f;
 247   g_min = g_max = g_avg = 0.0;
 248   /* check gamma ramp entries to estimate the gamma */
 249   TRACE("analyzing gamma ramp (%d->%d)\n", f, l);
 250   for (i=1, g_n=0; i<255; i++) {
 251     if (ramp[i] < f || ramp[i] > l) {
 252       ERR("strange gamma ramp ([%d]=%d for %d->%d), rejected\n", i, ramp[i], f, l);
 253       return FALSE;
 254     }
 255     c = ramp[i] - f;
 256     if (!c) continue; /* avoid log(0) */
 257
 258     /* normalize entry values into 0..1 range */
 259     r_x = i/255.0; r_y = c / r_d;
 260     /* compute logarithms of values */
 261     r_lx = log(r_x); r_ly = log(r_y);
 262     /* compute gamma for this entry */
 263     r_v = r_ly / r_lx;
 264     /* compute differential (error estimate) for this entry */
 265     /* some games use table-based logarithms that magnifies the error by 128 */
 266     r_e = -r_lx * 128 / (c * r_lx * r_lx);
 267
 268     /* compute min & max while compensating for estimated error */
 269     if (!g_n || g_min > (r_v + r_e)) g_min = r_v + r_e;
 270     if (!g_n || g_max < (r_v - r_e)) g_max = r_v - r_e;
 271
 272     /* add to average */
 273     g_avg += r_v;
 274     g_n++;
 275     /* TRACE("[%d]=%d, gamma=%f, error=%f\n", i, ramp[i], r_v, r_e); */
 276   }
 277   if (!g_n) {
 278     ERR("no gamma data, shouldn't happen\n");
 279     return FALSE;
 280   }
 281   g_avg /= g_n;
 282   TRACE("low bias is %d, high is %d, gamma is %5.3f\n", f, 65535-l, g_avg);
 283   /* the bias could be because the app wanted something like a "red shift"
 284    * like when you're hit in Quake, but XVidMode doesn't support it,
 285    * so we have to reject a significant bias */
 286   if (f && f > (pow(1/255.0, g_avg) * 65536.0)) {
 287     ERR("low-biased gamma ramp (%d), rejected\n", f);
 288     return FALSE;
 289   }
 290   /* check that the gamma is reasonably uniform across the ramp */
 291   if (g_max - g_min > 0.1) {
 292     ERR("ramp not uniform (max=%f, min=%f, avg=%f), rejected\n", g_max, g_min, g_avg);
 293     return FALSE;
 294   }
 295   /* ok, now we're pretty sure we can set the desired gamma ramp,
 296    * so go for it */
 297   *gamma = 1/g_avg;
 298   return TRUE;
 299 }
 300
 301 #endif /* X_XF86VidModeSetGamma */
 302
 303 /* Hmm... should gamma control be available in desktop mode or not?
 304  * I'll assume that it should */
 305
 306 BOOL X11DRV_XF86VM_GetGammaRamp(LPDDGAMMARAMP ramp)
 307 {
 308 #ifdef X_XF86VidModeSetGamma
 309   XF86VidModeGamma gamma;
 310   Bool ret;
 311
 312   if (xf86vm_major < 2) return FALSE; /* no gamma control */
 313 #ifdef X_XF86VidModeSetGammaRamp
 314   else if (xf86vm_use_gammaramp)
 315   {
 316       Bool ret;
 317       wine_tsx11_lock();
 318       ret = XF86VidModeGetGammaRamp(gdi_display, DefaultScreen(gdi_display), 256,
 319                                     ramp->red, ramp->green, ramp->blue);
 320       wine_tsx11_unlock();
 321       return ret;
 322   }
 323 #endif
 324   else
 325   {
 326       wine_tsx11_lock();
 327       ret = XF86VidModeGetGamma(gdi_display, DefaultScreen(gdi_display), &gamma);
 328       wine_tsx11_unlock();
 329       if (ret) {
 330           GenerateRampFromGamma(ramp->red,   gamma.red);
 331           GenerateRampFromGamma(ramp->green, gamma.green);
 332           GenerateRampFromGamma(ramp->blue,  gamma.blue);
 333           return TRUE;
 334       }
 335   }
 336 #endif /* X_XF86VidModeSetGamma */
 337   return FALSE;
 338 }
 339
 340 BOOL X11DRV_XF86VM_SetGammaRamp(LPDDGAMMARAMP ramp)
 341 {
 342 #ifdef X_XF86VidModeSetGamma
 343   XF86VidModeGamma gamma;
 344
 345   if (xf86vm_major < 2) return FALSE; /* no gamma control */
 346 #ifdef X_XF86VidModeSetGammaRamp
 347   else if (xf86vm_use_gammaramp)
 348   {
 349       Bool ret;
 350       wine_tsx11_lock();
 351       ret = XF86VidModeSetGammaRamp(gdi_display, DefaultScreen(gdi_display), 256,
 352                                     ramp->red, ramp->green, ramp->blue);
 353       wine_tsx11_unlock();
 354       return ret;
 355   }
 356 #endif
 357   else
 358   {
 359       if (ComputeGammaFromRamp(ramp->red,   &gamma.red) &&
 360           ComputeGammaFromRamp(ramp->green, &gamma.green) &&
 361           ComputeGammaFromRamp(ramp->blue,  &gamma.blue)) {
 362           Bool ret;
 363           wine_tsx11_lock();
 364           ret = XF86VidModeSetGamma(gdi_display, DefaultScreen(gdi_display), &gamma);
 365           wine_tsx11_unlock();
 366           return ret;
 367       }
 368   }
 369 #endif /* X_XF86VidModeSetGamma */
 370   return FALSE;
 371 }
 372
 373 #endif /* HAVE_LIBXXF86VM */
 374
 375 /***********************************************************************
 376  *              GetDeviceGammaRamp (X11DRV.@)
 377  *
 378  * FIXME: should move to somewhere appropriate, but probably not before
 379  * the stuff in graphics/x11drv/ has been moved to dlls/x11drv, so that
 380  * they can include xvidmode.h directly
 381  */
 382 BOOL X11DRV_GetDeviceGammaRamp(X11DRV_PDEVICE *physDev, LPVOID ramp)
 383 {
 384 #ifdef HAVE_LIBXXF86VM
 385   return X11DRV_XF86VM_GetGammaRamp(ramp);
 386 #else
 387   return FALSE;
 388 #endif
 389 }
 390
 391 /***********************************************************************
 392  *              SetDeviceGammaRamp (X11DRV.@)
 393  *
 394  * FIXME: should move to somewhere appropriate, but probably not before
 395  * the stuff in graphics/x11drv/ has been moved to dlls/x11drv, so that
 396  * they can include xvidmode.h directly
 397  */
 398 BOOL X11DRV_SetDeviceGammaRamp(X11DRV_PDEVICE *physDev, LPVOID ramp)
 399 {
 400 #ifdef HAVE_LIBXXF86VM
 401   return X11DRV_XF86VM_SetGammaRamp(ramp);
 402 #else
 403   return FALSE;
 404 #endif
 405 }