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   /* see if XVidMode is available */
 152   wine_tsx11_lock();
 153   ok = XF86VidModeQueryExtension(gdi_display, &xf86vm_event, &xf86vm_error);
 154   if (ok)
 155   {
 156       X11DRV_expect_error(gdi_display, XVidModeErrorHandler, NULL);
 157       ok = XF86VidModeQueryVersion(gdi_display, &xf86vm_major, &xf86vm_minor);
 158       if (X11DRV_check_error()) ok = FALSE;
 159   }
 160   if (ok)
 161   {
 162 #ifdef X_XF86VidModeSetGammaRamp
 163       if (xf86vm_major > 2 || (xf86vm_major == 2 && xf86vm_minor >= 1))
 164       {
 165           XF86VidModeGetGammaRampSize(gdi_display, DefaultScreen(gdi_display),
 166                                       &xf86vm_gammaramp_size);
 167           if (xf86vm_gammaramp_size == 256)
 168               xf86vm_use_gammaramp = TRUE;
 169       }
 170 #endif /* X_XF86VidModeSetGammaRamp */
 171
 172       /* retrieve modes */
 173       if (usexvidmode && root_window == DefaultRootWindow( gdi_display ))
 174           ok = XF86VidModeGetAllModeLines(gdi_display, DefaultScreen(gdi_display), &nmodes, &real_xf86vm_modes);
 175       else
 176           ok = FALSE; /* In desktop mode, do not switch resolution... But still use the Gamma ramp stuff */
 177   }
 178   wine_tsx11_unlock();
 179   if (!ok) return;
 180
 181   TRACE("XVidMode modes: count=%d\n", nmodes);
 182
 183   real_xf86vm_mode_count = nmodes;
 184
 185   dd_modes = X11DRV_Settings_SetHandlers("XF86VidMode",
 186                                          X11DRV_XF86VM_GetCurrentMode,
 187                                          X11DRV_XF86VM_SetCurrentMode,
 188                                          nmodes, 1);
 189
 190   /* convert modes to DDHALMODEINFO format */
 191   for (i=0; i<real_xf86vm_mode_count; i++)
 192   {
 193       convert_modeinfo(real_xf86vm_modes[i]);
 194   }
 195   /* add modes for different color depths */
 196   X11DRV_Settings_AddDepthModes();
 197   dd_mode_count = X11DRV_Settings_GetModeCount();
 198
 199   TRACE("Available DD modes: count=%d\n", dd_mode_count);
 200
 201   /* the first mode in the list seems to be the default */
 202   X11DRV_Settings_SetDefaultMode(0);
 203
 204   TRACE("Enabling XVidMode\n");
 205 }
 206
 207 void X11DRV_XF86VM_Cleanup(void)
 208 {
 209   wine_tsx11_lock();
 210   if (real_xf86vm_modes) XFree(real_xf86vm_modes);
 211   wine_tsx11_unlock();
 212 }
 213
 214 void X11DRV_XF86VM_SetExclusiveMode(int lock)
 215 {
 216   if (!dd_modes) return; /* no XVidMode */
 217
 218   wine_tsx11_lock();
 219   XF86VidModeLockModeSwitch(gdi_display, DefaultScreen(gdi_display), lock);
 220   wine_tsx11_unlock();
 221 }
 222
 223 /***** GAMMA CONTROL *****/
 224 /* (only available in XF86VidMode 2.x) */
 225
 226 #ifdef X_XF86VidModeSetGamma
 227
 228 static void GenerateRampFromGamma(WORD ramp[256], float gamma)
 229 {
 230   float r_gamma = 1/gamma;
 231   unsigned i;
 232   TRACE("gamma is %f\n", r_gamma);
 233   for (i=0; i<256; i++)
 234     ramp[i] = pow(i/255.0, r_gamma) * 65535.0;
 235 }
 236
 237 static BOOL ComputeGammaFromRamp(WORD ramp[256], float *gamma)
 238 {
 239   float r_x, r_y, r_lx, r_ly, r_d, r_v, r_e, g_avg, g_min, g_max;
 240   unsigned i, f, l, g_n, c;
 241   f = ramp[0];
 242   l = ramp[255];
 243   if (f >= l) {
 244     ERR("inverted or flat gamma ramp (%d->%d), rejected\n", f, l);
 245     return FALSE;
 246   }
 247   r_d = l - f;
 248   g_min = g_max = g_avg = 0.0;
 249   /* check gamma ramp entries to estimate the gamma */
 250   TRACE("analyzing gamma ramp (%d->%d)\n", f, l);
 251   for (i=1, g_n=0; i<255; i++) {
 252     if (ramp[i] < f || ramp[i] > l) {
 253       ERR("strange gamma ramp ([%d]=%d for %d->%d), rejected\n", i, ramp[i], f, l);
 254       return FALSE;
 255     }
 256     c = ramp[i] - f;
 257     if (!c) continue; /* avoid log(0) */
 258
 259     /* normalize entry values into 0..1 range */
 260     r_x = i/255.0; r_y = c / r_d;
 261     /* compute logarithms of values */
 262     r_lx = log(r_x); r_ly = log(r_y);
 263     /* compute gamma for this entry */
 264     r_v = r_ly / r_lx;
 265     /* compute differential (error estimate) for this entry */
 266     /* some games use table-based logarithms that magnifies the error by 128 */
 267     r_e = -r_lx * 128 / (c * r_lx * r_lx);
 268
 269     /* compute min & max while compensating for estimated error */
 270     if (!g_n || g_min > (r_v + r_e)) g_min = r_v + r_e;
 271     if (!g_n || g_max < (r_v - r_e)) g_max = r_v - r_e;
 272
 273     /* add to average */
 274     g_avg += r_v;
 275     g_n++;
 276     /* TRACE("[%d]=%d, gamma=%f, error=%f\n", i, ramp[i], r_v, r_e); */
 277   }
 278   if (!g_n) {
 279     ERR("no gamma data, shouldn't happen\n");
 280     return FALSE;
 281   }
 282   g_avg /= g_n;
 283   TRACE("low bias is %d, high is %d, gamma is %5.3f\n", f, 65535-l, g_avg);
 284   /* the bias could be because the app wanted something like a "red shift"
 285    * like when you're hit in Quake, but XVidMode doesn't support it,
 286    * so we have to reject a significant bias */
 287   if (f && f > (pow(1/255.0, g_avg) * 65536.0)) {
 288     ERR("low-biased gamma ramp (%d), rejected\n", f);
 289     return FALSE;
 290   }
 291   /* check that the gamma is reasonably uniform across the ramp */
 292   if (g_max - g_min > 0.1) {
 293     ERR("ramp not uniform (max=%f, min=%f, avg=%f), rejected\n", g_max, g_min, g_avg);
 294     return FALSE;
 295   }
 296   /* ok, now we're pretty sure we can set the desired gamma ramp,
 297    * so go for it */
 298   *gamma = 1/g_avg;
 299   return TRUE;
 300 }
 301
 302 #endif /* X_XF86VidModeSetGamma */
 303
 304 /* Hmm... should gamma control be available in desktop mode or not?
 305  * I'll assume that it should */
 306
 307 BOOL X11DRV_XF86VM_GetGammaRamp(LPDDGAMMARAMP ramp)
 308 {
 309 #ifdef X_XF86VidModeSetGamma
 310   XF86VidModeGamma gamma;
 311   Bool ret;
 312
 313   if (xf86vm_major < 2) return FALSE; /* no gamma control */
 314 #ifdef X_XF86VidModeSetGammaRamp
 315   else if (xf86vm_use_gammaramp)
 316   {
 317       Bool ret;
 318       wine_tsx11_lock();
 319       ret = XF86VidModeGetGammaRamp(gdi_display, DefaultScreen(gdi_display), 256,
 320                                     ramp->red, ramp->green, ramp->blue);
 321       wine_tsx11_unlock();
 322       return ret;
 323   }
 324 #endif
 325   else
 326   {
 327       wine_tsx11_lock();
 328       ret = XF86VidModeGetGamma(gdi_display, DefaultScreen(gdi_display), &gamma);
 329       wine_tsx11_unlock();
 330       if (ret) {
 331           GenerateRampFromGamma(ramp->red,   gamma.red);
 332           GenerateRampFromGamma(ramp->green, gamma.green);
 333           GenerateRampFromGamma(ramp->blue,  gamma.blue);
 334           return TRUE;
 335       }
 336   }
 337 #endif /* X_XF86VidModeSetGamma */
 338   return FALSE;
 339 }
 340
 341 BOOL X11DRV_XF86VM_SetGammaRamp(LPDDGAMMARAMP ramp)
 342 {
 343 #ifdef X_XF86VidModeSetGamma
 344   XF86VidModeGamma gamma;
 345
 346   if (xf86vm_major < 2) return FALSE; /* no gamma control */
 347 #ifdef X_XF86VidModeSetGammaRamp
 348   else if (xf86vm_use_gammaramp)
 349   {
 350       Bool ret;
 351       wine_tsx11_lock();
 352       ret = XF86VidModeSetGammaRamp(gdi_display, DefaultScreen(gdi_display), 256,
 353                                     ramp->red, ramp->green, ramp->blue);
 354       wine_tsx11_unlock();
 355       return ret;
 356   }
 357 #endif
 358   else
 359   {
 360       if (ComputeGammaFromRamp(ramp->red,   &gamma.red) &&
 361           ComputeGammaFromRamp(ramp->green, &gamma.green) &&
 362           ComputeGammaFromRamp(ramp->blue,  &gamma.blue)) {
 363           Bool ret;
 364           wine_tsx11_lock();
 365           ret = XF86VidModeSetGamma(gdi_display, DefaultScreen(gdi_display), &gamma);
 366           wine_tsx11_unlock();
 367           return ret;
 368       }
 369   }
 370 #endif /* X_XF86VidModeSetGamma */
 371   return FALSE;
 372 }
 373
 374 #endif /* HAVE_LIBXXF86VM */
 375
 376 /***********************************************************************
 377  *              GetDeviceGammaRamp (X11DRV.@)
 378  *
 379  * FIXME: should move to somewhere appropriate, but probably not before
 380  * the stuff in graphics/x11drv/ has been moved to dlls/x11drv, so that
 381  * they can include xvidmode.h directly
 382  */
 383 BOOL X11DRV_GetDeviceGammaRamp(X11DRV_PDEVICE *physDev, LPVOID ramp)
 384 {
 385 #ifdef HAVE_LIBXXF86VM
 386   return X11DRV_XF86VM_GetGammaRamp(ramp);
 387 #else
 388   return FALSE;
 389 #endif
 390 }
 391
 392 /***********************************************************************
 393  *              SetDeviceGammaRamp (X11DRV.@)
 394  *
 395  * FIXME: should move to somewhere appropriate, but probably not before
 396  * the stuff in graphics/x11drv/ has been moved to dlls/x11drv, so that
 397  * they can include xvidmode.h directly
 398  */
 399 BOOL X11DRV_SetDeviceGammaRamp(X11DRV_PDEVICE *physDev, LPVOID ramp)
 400 {
 401 #ifdef HAVE_LIBXXF86VM
 402   return X11DRV_XF86VM_SetGammaRamp(ramp);
 403 #else
 404   return FALSE;
 405 #endif
 406 }