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 #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 "x11ddraw.h"
  33 #include "xvidmode.h"
  34
  35 #include "windef.h"
  36 #include "wingdi.h"
  37 #include "ddrawi.h"
  38 #include "wine/debug.h"
  39
  40 WINE_DEFAULT_DEBUG_CHANNEL(xvidmode);
  41
  42 #ifdef HAVE_LIBXXF86VM
  43
  44 extern int usexvidmode;
  45
  46 static int xf86vm_event, xf86vm_error, xf86vm_major, xf86vm_minor;
  47
  48 #ifdef X_XF86VidModeSetGammaRamp
  49 static int xf86vm_gammaramp_size;
  50 static BOOL xf86vm_use_gammaramp;
  51 #endif /* X_XF86VidModeSetGammaRamp */
  52
  53 static LPDDHALMODEINFO dd_modes;
  54 static unsigned int dd_mode_count;
  55 static XF86VidModeModeInfo** real_xf86vm_modes;
  56 static unsigned int real_xf86vm_mode_count;
  57
  58 static void convert_modeinfo( const XF86VidModeModeInfo *mode)
  59 {
  60   int rate;
  61   if (mode->htotal!=0 && mode->vtotal!=0)
  62       rate = mode->dotclock * 1000 / (mode->htotal * mode->vtotal);
  63   else
  64       rate = 0;
  65   X11DRV_Settings_AddOneMode(mode->hdisplay, mode->vdisplay, 0, rate);
  66 }
  67
  68 static void convert_modeline(int dotclock, const XF86VidModeModeLine *mode, LPDDHALMODEINFO info, unsigned int bpp)
  69 {
  70   info->dwWidth      = mode->hdisplay;
  71   info->dwHeight     = mode->vdisplay;
  72   if (mode->htotal!=0 && mode->vtotal!=0)
  73       info->wRefreshRate = dotclock * 1000 / (mode->htotal * mode->vtotal);
  74   else
  75       info->wRefreshRate = 0;
  76   TRACE(" width=%ld, height=%ld, refresh=%d\n",
  77         info->dwWidth, info->dwHeight, info->wRefreshRate);
  78   info->lPitch         = 0;
  79   info->dwBPP          = bpp;
  80   info->wFlags         = 0;
  81   info->dwRBitMask     = 0;
  82   info->dwGBitMask     = 0;
  83   info->dwBBitMask     = 0;
  84   info->dwAlphaBitMask = 0;
  85 }
  86
  87 static int XVidModeErrorHandler(Display *dpy, XErrorEvent *event, void *arg)
  88 {
  89     return 1;
  90 }
  91
  92 int X11DRV_XF86VM_GetCurrentMode(void)
  93 {
  94   XF86VidModeModeLine line;
  95   int dotclock;
  96   unsigned int i;
  97   DDHALMODEINFO cmode;
  98   DWORD dwBpp = screen_depth;
  99   if (dwBpp == 24) dwBpp = 32;
 100
 101   TRACE("Querying XVidMode current mode\n");
 102   wine_tsx11_lock();
 103   XF86VidModeGetModeLine(gdi_display, DefaultScreen(gdi_display), &dotclock, &line);
 104   wine_tsx11_unlock();
 105   convert_modeline(dotclock, &line, &cmode, dwBpp);
 106   for (i=0; i<dd_mode_count; i++)
 107     if (memcmp(&dd_modes[i], &cmode, sizeof(cmode)) == 0) {
 108       TRACE("mode=%d\n", i);
 109       return i;
 110     }
 111   ERR("In unknown mode, returning default\n");
 112   return 0;
 113 }
 114
 115 void X11DRV_XF86VM_SetCurrentMode(int mode)
 116 {
 117   DWORD dwBpp = screen_depth;
 118   if (dwBpp == 24) dwBpp = 32;
 119   /* only set modes from the original color depth */
 120   if (dwBpp != dd_modes[mode].dwBPP)
 121   {
 122       FIXME("Cannot change screen BPP from %ld to %ld\n", dwBpp, dd_modes[mode].dwBPP);
 123   }
 124   mode = mode % real_xf86vm_mode_count;
 125
 126   wine_tsx11_lock();
 127   TRACE("Resizing X display to %dx%d\n",
 128         real_xf86vm_modes[mode]->hdisplay, real_xf86vm_modes[mode]->vdisplay);
 129   XF86VidModeSwitchToMode(gdi_display, DefaultScreen(gdi_display), real_xf86vm_modes[mode]);
 130 #if 0 /* it is said that SetViewPort causes problems with some X servers */
 131   XF86VidModeSetViewPort(gdi_display, DefaultScreen(gdi_display), 0, 0);
 132 #else
 133   XWarpPointer(gdi_display, None, DefaultRootWindow(gdi_display), 0, 0, 0, 0, 0, 0);
 134 #endif
 135   XSync(gdi_display, False);
 136   wine_tsx11_unlock();
 137   X11DRV_handle_desktop_resize( real_xf86vm_modes[mode]->hdisplay,
 138                                 real_xf86vm_modes[mode]->vdisplay );
 139 }
 140
 141 void X11DRV_XF86VM_Init(void)
 142 {
 143   Bool ok;
 144   int nmodes;
 145   unsigned int i;
 146   DWORD dwBpp = screen_depth;
 147   if (dwBpp == 24) dwBpp = 32;
 148
 149   if (xf86vm_major) return; /* already initialized? */
 150
 151   if (!usexvidmode) return;
 152
 153   /* see if XVidMode is available */
 154   wine_tsx11_lock();
 155   ok = XF86VidModeQueryExtension(gdi_display, &xf86vm_event, &xf86vm_error);
 156   if (ok)
 157   {
 158       X11DRV_expect_error(gdi_display, XVidModeErrorHandler, NULL);
 159       ok = XF86VidModeQueryVersion(gdi_display, &xf86vm_major, &xf86vm_minor);
 160       if (X11DRV_check_error()) ok = FALSE;
 161   }
 162   if (ok)
 163   {
 164 #ifdef X_XF86VidModeSetGammaRamp
 165       if (xf86vm_major > 2 || (xf86vm_major == 2 && xf86vm_minor >= 1))
 166       {
 167           XF86VidModeGetGammaRampSize(gdi_display, DefaultScreen(gdi_display),
 168                                       &xf86vm_gammaramp_size);
 169           if (xf86vm_gammaramp_size == 256)
 170               xf86vm_use_gammaramp = TRUE;
 171       }
 172 #endif /* X_XF86VidModeSetGammaRamp */
 173
 174       /* retrieve modes */
 175       if (!using_wine_desktop) ok = XF86VidModeGetAllModeLines(gdi_display, DefaultScreen(gdi_display), &nmodes, &real_xf86vm_modes);
 176   }
 177   wine_tsx11_unlock();
 178   if (!ok) return;
 179
 180   /* In desktop mode, do not switch resolution... But still use the Gamma ramp stuff */
 181   if (using_wine_desktop) return;
 182
 183   TRACE("XVidMode modes: count=%d\n", nmodes);
 184
 185   real_xf86vm_mode_count = nmodes;
 186
 187   dd_modes = X11DRV_Settings_SetHandlers("XF86VidMode",
 188                                          X11DRV_XF86VM_GetCurrentMode,
 189                                          X11DRV_XF86VM_SetCurrentMode,
 190                                          nmodes, 1);
 191
 192   /* convert modes to DDHALMODEINFO format */
 193   for (i=0; i<real_xf86vm_mode_count; i++)
 194   {
 195       convert_modeinfo(real_xf86vm_modes[i]);
 196   }
 197   /* add modes for different color depths */
 198   X11DRV_Settings_AddDepthModes();
 199   dd_mode_count = X11DRV_Settings_GetModeCount();
 200
 201   TRACE("Available DD modes: count=%d\n", dd_mode_count);
 202
 203   /* the first mode in the list seems to be the default */
 204   X11DRV_Settings_SetDefaultMode(0);
 205
 206   TRACE("Enabling XVidMode\n");
 207 }
 208
 209 void X11DRV_XF86VM_Cleanup(void)
 210 {
 211   wine_tsx11_lock();
 212   if (real_xf86vm_modes) XFree(real_xf86vm_modes);
 213   wine_tsx11_unlock();
 214 }
 215
 216 void X11DRV_XF86VM_SetExclusiveMode(int lock)
 217 {
 218   if (!dd_modes) return; /* no XVidMode */
 219
 220   wine_tsx11_lock();
 221   XF86VidModeLockModeSwitch(gdi_display, DefaultScreen(gdi_display), lock);
 222   wine_tsx11_unlock();
 223 }
 224
 225 /***** GAMMA CONTROL *****/
 226 /* (only available in XF86VidMode 2.x) */
 227
 228 #ifdef X_XF86VidModeSetGamma
 229
 230 static void GenerateRampFromGamma(WORD ramp[256], float gamma)
 231 {
 232   float r_gamma = 1/gamma;
 233   unsigned i;
 234   TRACE("gamma is %f\n", r_gamma);
 235   for (i=0; i<256; i++)
 236     ramp[i] = pow(i/255.0, r_gamma) * 65535.0;
 237 }
 238
 239 static BOOL ComputeGammaFromRamp(WORD ramp[256], float *gamma)
 240 {
 241   float r_x, r_y, r_lx, r_ly, r_d, r_v, r_e, g_avg, g_min, g_max;
 242   unsigned i, f, l, g_n, c;
 243   f = ramp[0];
 244   l = ramp[255];
 245   if (f >= l) {
 246     ERR("inverted or flat gamma ramp (%d->%d), rejected\n", f, l);
 247     return FALSE;
 248   }
 249   r_d = l - f;
 250   g_min = g_max = g_avg = 0.0;
 251   /* check gamma ramp entries to estimate the gamma */
 252   TRACE("analyzing gamma ramp (%d->%d)\n", f, l);
 253   for (i=1, g_n=0; i<255; i++) {
 254     if (ramp[i] < f || ramp[i] > l) {
 255       ERR("strange gamma ramp ([%d]=%d for %d->%d), rejected\n", i, ramp[i], f, l);
 256       return FALSE;
 257     }
 258     c = ramp[i] - f;
 259     if (!c) continue; /* avoid log(0) */
 260
 261     /* normalize entry values into 0..1 range */
 262     r_x = i/255.0; r_y = c / r_d;
 263     /* compute logarithms of values */
 264     r_lx = log(r_x); r_ly = log(r_y);
 265     /* compute gamma for this entry */
 266     r_v = r_ly / r_lx;
 267     /* compute differential (error estimate) for this entry */
 268     /* some games use table-based logarithms that magnifies the error by 128 */
 269     r_e = -r_lx * 128 / (c * r_lx * r_lx);
 270
 271     /* compute min & max while compensating for estimated error */
 272     if (!g_n || g_min > (r_v + r_e)) g_min = r_v + r_e;
 273     if (!g_n || g_max < (r_v - r_e)) g_max = r_v - r_e;
 274
 275     /* add to average */
 276     g_avg += r_v;
 277     g_n++;
 278     /* TRACE("[%d]=%d, gamma=%f, error=%f\n", i, ramp[i], r_v, r_e); */
 279   }
 280   if (!g_n) {
 281     ERR("no gamma data, shouldn't happen\n");
 282     return FALSE;
 283   }
 284   g_avg /= g_n;
 285   TRACE("low bias is %d, high is %d, gamma is %5.3f\n", f, 65535-l, g_avg);
 286   /* the bias could be because the app wanted something like a "red shift"
 287    * like when you're hit in Quake, but XVidMode doesn't support it,
 288    * so we have to reject a significant bias */
 289   if (f && f > (pow(1/255.0, g_avg) * 65536.0)) {
 290     ERR("low-biased gamma ramp (%d), rejected\n", f);
 291     return FALSE;
 292   }
 293   /* check that the gamma is reasonably uniform across the ramp */
 294   if (g_max - g_min > 0.1) {
 295     ERR("ramp not uniform (max=%f, min=%f, avg=%f), rejected\n", g_max, g_min, g_avg);
 296     return FALSE;
 297   }
 298   /* ok, now we're pretty sure we can set the desired gamma ramp,
 299    * so go for it */
 300   *gamma = 1/g_avg;
 301   return TRUE;
 302 }
 303
 304 #endif /* X_XF86VidModeSetGamma */
 305
 306 /* Hmm... should gamma control be available in desktop mode or not?
 307  * I'll assume that it should */
 308
 309 BOOL X11DRV_XF86VM_GetGammaRamp(LPDDGAMMARAMP ramp)
 310 {
 311 #ifdef X_XF86VidModeSetGamma
 312   XF86VidModeGamma gamma;
 313   Bool ret;
 314
 315   if (xf86vm_major < 2) return FALSE; /* no gamma control */
 316 #ifdef X_XF86VidModeSetGammaRamp
 317   else if (xf86vm_use_gammaramp)
 318   {
 319       Bool ret;
 320       wine_tsx11_lock();
 321       ret = XF86VidModeGetGammaRamp(gdi_display, DefaultScreen(gdi_display), 256,
 322                                     ramp->red, ramp->green, ramp->blue);
 323       wine_tsx11_unlock();
 324       return ret;
 325   }
 326 #endif
 327   else
 328   {
 329       wine_tsx11_lock();
 330       ret = XF86VidModeGetGamma(gdi_display, DefaultScreen(gdi_display), &gamma);
 331       wine_tsx11_unlock();
 332       if (ret) {
 333           GenerateRampFromGamma(ramp->red,   gamma.red);
 334           GenerateRampFromGamma(ramp->green, gamma.green);
 335           GenerateRampFromGamma(ramp->blue,  gamma.blue);
 336           return TRUE;
 337       }
 338   }
 339 #endif /* X_XF86VidModeSetGamma */
 340   return FALSE;
 341 }
 342
 343 BOOL X11DRV_XF86VM_SetGammaRamp(LPDDGAMMARAMP ramp)
 344 {
 345 #ifdef X_XF86VidModeSetGamma
 346   XF86VidModeGamma gamma;
 347
 348   if (xf86vm_major < 2) return FALSE; /* no gamma control */
 349 #ifdef X_XF86VidModeSetGammaRamp
 350   else if (xf86vm_use_gammaramp)
 351   {
 352       Bool ret;
 353       wine_tsx11_lock();
 354       ret = XF86VidModeSetGammaRamp(gdi_display, DefaultScreen(gdi_display), 256,
 355                                     ramp->red, ramp->green, ramp->blue);
 356       wine_tsx11_unlock();
 357       return ret;
 358   }
 359 #endif
 360   else
 361   {
 362       if (ComputeGammaFromRamp(ramp->red,   &gamma.red) &&
 363           ComputeGammaFromRamp(ramp->green, &gamma.green) &&
 364           ComputeGammaFromRamp(ramp->blue,  &gamma.blue)) {
 365           Bool ret;
 366           wine_tsx11_lock();
 367           ret = XF86VidModeSetGamma(gdi_display, DefaultScreen(gdi_display), &gamma);
 368           wine_tsx11_unlock();
 369           return ret;
 370       }
 371   }
 372 #endif /* X_XF86VidModeSetGamma */
 373   return FALSE;
 374 }
 375
 376 #endif /* HAVE_LIBXXF86VM */
 377
 378 /***********************************************************************
 379  *              GetDeviceGammaRamp (X11DRV.@)
 380  *
 381  * FIXME: should move to somewhere appropriate, but probably not before
 382  * the stuff in graphics/x11drv/ has been moved to dlls/x11drv, so that
 383  * they can include xvidmode.h directly
 384  */
 385 BOOL X11DRV_GetDeviceGammaRamp(X11DRV_PDEVICE *physDev, LPVOID ramp)
 386 {
 387 #ifdef HAVE_LIBXXF86VM
 388   return X11DRV_XF86VM_GetGammaRamp(ramp);
 389 #else
 390   return FALSE;
 391 #endif
 392 }
 393
 394 /***********************************************************************
 395  *              SetDeviceGammaRamp (X11DRV.@)
 396  *
 397  * FIXME: should move to somewhere appropriate, but probably not before
 398  * the stuff in graphics/x11drv/ has been moved to dlls/x11drv, so that
 399  * they can include xvidmode.h directly
 400  */
 401 BOOL X11DRV_SetDeviceGammaRamp(X11DRV_PDEVICE *physDev, LPVOID ramp)
 402 {
 403 #ifdef HAVE_LIBXXF86VM
 404   return X11DRV_XF86VM_SetGammaRamp(ramp);
 405 #else
 406   return FALSE;
 407 #endif
 408 }