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 <X11/Xlib.h>
  27
  28 #ifdef HAVE_LIBXXF86VM
  29 #define XMD_H
  30 #include "basetsd.h"
  31 #include <X11/extensions/xf86vmode.h>
  32 #endif /* HAVE_LIBXXF86VM */
  33
  34 #include "x11drv.h"
  35 #include "x11ddraw.h"
  36 #include "xvidmode.h"
  37
  38 #include "windef.h"
  39 #include "wingdi.h"
  40 #include "ddrawi.h"
  41 #include "wine/debug.h"
  42
  43 WINE_DEFAULT_DEBUG_CHANNEL(xvidmode);
  44
  45 #ifdef HAVE_LIBXXF86VM
  46
  47 extern int usexvidmode;
  48
  49 static int xf86vm_event, xf86vm_error, xf86vm_major, xf86vm_minor;
  50
  51 #ifdef X_XF86VidModeSetGammaRamp
  52 static int xf86vm_gammaramp_size;
  53 static BOOL xf86vm_use_gammaramp;
  54 #endif /* X_XF86VidModeSetGammaRamp */
  55
  56 static LPDDHALMODEINFO dd_modes;
  57 static unsigned int dd_mode_count;
  58 static XF86VidModeModeInfo** real_xf86vm_modes;
  59 static unsigned int real_xf86vm_mode_count;
  60
  61 static void convert_modeinfo( const XF86VidModeModeInfo *mode)
  62 {
  63   int rate;
  64   if (mode->htotal!=0 && mode->vtotal!=0)
  65       rate = mode->dotclock * 1000 / (mode->htotal * mode->vtotal);
  66   else
  67       rate = 0;
  68   X11DRV_Settings_AddOneMode(mode->hdisplay, mode->vdisplay, 0, rate);
  69 }
  70
  71 static void convert_modeline(int dotclock, const XF86VidModeModeLine *mode, LPDDHALMODEINFO info, unsigned int bpp)
  72 {
  73   info->dwWidth      = mode->hdisplay;
  74   info->dwHeight     = mode->vdisplay;
  75   if (mode->htotal!=0 && mode->vtotal!=0)
  76       info->wRefreshRate = dotclock * 1000 / (mode->htotal * mode->vtotal);
  77   else
  78       info->wRefreshRate = 0;
  79   TRACE(" width=%ld, height=%ld, refresh=%d\n",
  80         info->dwWidth, info->dwHeight, info->wRefreshRate);
  81   info->lPitch         = 0;
  82   info->dwBPP          = bpp;
  83   info->wFlags         = 0;
  84   info->dwRBitMask     = 0;
  85   info->dwGBitMask     = 0;
  86   info->dwBBitMask     = 0;
  87   info->dwAlphaBitMask = 0;
  88 }
  89
  90 static int XVidModeErrorHandler(Display *dpy, XErrorEvent *event, void *arg)
  91 {
  92     return 1;
  93 }
  94
  95 int X11DRV_XF86VM_GetCurrentMode(void)
  96 {
  97   XF86VidModeModeLine line;
  98   int dotclock;
  99   unsigned int i;
 100   DDHALMODEINFO cmode;
 101   DWORD dwBpp = screen_depth;
 102   if (dwBpp == 24) dwBpp = 32;
 103
 104   TRACE("Querying XVidMode current mode\n");
 105   wine_tsx11_lock();
 106   XF86VidModeGetModeLine(gdi_display, DefaultScreen(gdi_display), &dotclock, &line);
 107   wine_tsx11_unlock();
 108   convert_modeline(dotclock, &line, &cmode, dwBpp);
 109   for (i=0; i<dd_mode_count; i++)
 110     if (memcmp(&dd_modes[i], &cmode, sizeof(cmode)) == 0) {
 111       TRACE("mode=%d\n", i);
 112       return i;
 113     }
 114   ERR("In unknown mode, returning default\n");
 115   return 0;
 116 }
 117
 118 void X11DRV_XF86VM_SetCurrentMode(int mode)
 119 {
 120   DWORD dwBpp = screen_depth;
 121   if (dwBpp == 24) dwBpp = 32;
 122   /* only set modes from the original color depth */
 123   if (dwBpp != dd_modes[mode].dwBPP)
 124   {
 125       FIXME("Cannot change screen BPP from %ld to %ld\n", dwBpp, dd_modes[mode].dwBPP);
 126   }
 127   mode = mode % real_xf86vm_mode_count;
 128
 129   wine_tsx11_lock();
 130   TRACE("Resizing X display to %dx%d\n",
 131         real_xf86vm_modes[mode]->hdisplay, real_xf86vm_modes[mode]->vdisplay);
 132   XF86VidModeSwitchToMode(gdi_display, DefaultScreen(gdi_display), real_xf86vm_modes[mode]);
 133 #if 0 /* it is said that SetViewPort causes problems with some X servers */
 134   XF86VidModeSetViewPort(gdi_display, DefaultScreen(gdi_display), 0, 0);
 135 #else
 136   XWarpPointer(gdi_display, None, DefaultRootWindow(gdi_display), 0, 0, 0, 0, 0, 0);
 137 #endif
 138   XSync(gdi_display, False);
 139   wine_tsx11_unlock();
 140   X11DRV_handle_desktop_resize( real_xf86vm_modes[mode]->hdisplay,
 141                                 real_xf86vm_modes[mode]->vdisplay );
 142 }
 143
 144 void X11DRV_XF86VM_Init(void)
 145 {
 146   Bool ok;
 147   int nmodes;
 148   unsigned int i;
 149   DWORD dwBpp = screen_depth;
 150   if (dwBpp == 24) dwBpp = 32;
 151
 152   if (xf86vm_major) return; /* already initialized? */
 153
 154   if (!usexvidmode) return;
 155
 156   /* see if XVidMode is available */
 157   wine_tsx11_lock();
 158   ok = XF86VidModeQueryExtension(gdi_display, &xf86vm_event, &xf86vm_error);
 159   if (ok)
 160   {
 161       X11DRV_expect_error(gdi_display, XVidModeErrorHandler, NULL);
 162       ok = XF86VidModeQueryVersion(gdi_display, &xf86vm_major, &xf86vm_minor);
 163       if (X11DRV_check_error()) ok = FALSE;
 164   }
 165   if (ok)
 166   {
 167 #ifdef X_XF86VidModeSetGammaRamp
 168       if (xf86vm_major > 2 || (xf86vm_major == 2 && xf86vm_minor >= 1))
 169       {
 170           XF86VidModeGetGammaRampSize(gdi_display, DefaultScreen(gdi_display),
 171                                       &xf86vm_gammaramp_size);
 172           if (xf86vm_gammaramp_size == 256)
 173               xf86vm_use_gammaramp = TRUE;
 174       }
 175 #endif /* X_XF86VidModeSetGammaRamp */
 176
 177       /* retrieve modes */
 178       if (!using_wine_desktop) ok = XF86VidModeGetAllModeLines(gdi_display, DefaultScreen(gdi_display), &nmodes, &real_xf86vm_modes);
 179   }
 180   wine_tsx11_unlock();
 181   if (!ok) return;
 182
 183   /* In desktop mode, do not switch resolution... But still use the Gamma ramp stuff */
 184   if (using_wine_desktop) return;
 185
 186   TRACE("XVidMode modes: count=%d\n", nmodes);
 187
 188   real_xf86vm_mode_count = nmodes;
 189
 190   dd_modes = X11DRV_Settings_SetHandlers("XF86VidMode",
 191                                          X11DRV_XF86VM_GetCurrentMode,
 192                                          X11DRV_XF86VM_SetCurrentMode,
 193                                          nmodes, 1);
 194
 195   /* convert modes to DDHALMODEINFO format */
 196   for (i=0; i<real_xf86vm_mode_count; i++)
 197   {
 198       convert_modeinfo(real_xf86vm_modes[i]);
 199   }
 200   /* add modes for different color depths */
 201   X11DRV_Settings_AddDepthModes();
 202   dd_mode_count = X11DRV_Settings_GetModeCount();
 203
 204   TRACE("Available DD modes: count=%d\n", dd_mode_count);
 205
 206   /* the first mode in the list seems to be the default */
 207   X11DRV_Settings_SetDefaultMode(0);
 208
 209   TRACE("Enabling XVidMode\n");
 210 }
 211
 212 void X11DRV_XF86VM_Cleanup(void)
 213 {
 214   wine_tsx11_lock();
 215   if (real_xf86vm_modes) XFree(real_xf86vm_modes);
 216   wine_tsx11_unlock();
 217 }
 218
 219 void X11DRV_XF86VM_SetExclusiveMode(int lock)
 220 {
 221   if (!dd_modes) return; /* no XVidMode */
 222
 223   wine_tsx11_lock();
 224   XF86VidModeLockModeSwitch(gdi_display, DefaultScreen(gdi_display), lock);
 225   wine_tsx11_unlock();
 226 }
 227
 228 /***** GAMMA CONTROL *****/
 229 /* (only available in XF86VidMode 2.x) */
 230
 231 #ifdef X_XF86VidModeSetGamma
 232
 233 static void GenerateRampFromGamma(WORD ramp[256], float gamma)
 234 {
 235   float r_gamma = 1/gamma;
 236   unsigned i;
 237   TRACE("gamma is %f\n", r_gamma);
 238   for (i=0; i<256; i++)
 239     ramp[i] = pow(i/255.0, r_gamma) * 65535.0;
 240 }
 241
 242 static BOOL ComputeGammaFromRamp(WORD ramp[256], float *gamma)
 243 {
 244   float r_x, r_y, r_lx, r_ly, r_d, r_v, r_e, g_avg, g_min, g_max;
 245   unsigned i, f, l, g_n, c;
 246   f = ramp[0];
 247   l = ramp[255];
 248   if (f >= l) {
 249     ERR("inverted or flat gamma ramp (%d->%d), rejected\n", f, l);
 250     return FALSE;
 251   }
 252   r_d = l - f;
 253   g_min = g_max = g_avg = 0.0;
 254   /* check gamma ramp entries to estimate the gamma */
 255   TRACE("analyzing gamma ramp (%d->%d)\n", f, l);
 256   for (i=1, g_n=0; i<255; i++) {
 257     if (ramp[i] < f || ramp[i] > l) {
 258       ERR("strange gamma ramp ([%d]=%d for %d->%d), rejected\n", i, ramp[i], f, l);
 259       return FALSE;
 260     }
 261     c = ramp[i] - f;
 262     if (!c) continue; /* avoid log(0) */
 263
 264     /* normalize entry values into 0..1 range */
 265     r_x = i/255.0; r_y = c / r_d;
 266     /* compute logarithms of values */
 267     r_lx = log(r_x); r_ly = log(r_y);
 268     /* compute gamma for this entry */
 269     r_v = r_ly / r_lx;
 270     /* compute differential (error estimate) for this entry */
 271     /* some games use table-based logarithms that magnifies the error by 128 */
 272     r_e = -r_lx * 128 / (c * r_lx * r_lx);
 273
 274     /* compute min & max while compensating for estimated error */
 275     if (!g_n || g_min > (r_v + r_e)) g_min = r_v + r_e;
 276     if (!g_n || g_max < (r_v - r_e)) g_max = r_v - r_e;
 277
 278     /* add to average */
 279     g_avg += r_v;
 280     g_n++;
 281     /* TRACE("[%d]=%d, gamma=%f, error=%f\n", i, ramp[i], r_v, r_e); */
 282   }
 283   if (!g_n) {
 284     ERR("no gamma data, shouldn't happen\n");
 285     return FALSE;
 286   }
 287   g_avg /= g_n;
 288   TRACE("low bias is %d, high is %d, gamma is %5.3f\n", f, 65535-l, g_avg);
 289   /* the bias could be because the app wanted something like a "red shift"
 290    * like when you're hit in Quake, but XVidMode doesn't support it,
 291    * so we have to reject a significant bias */
 292   if (f && f > (pow(1/255.0, g_avg) * 65536.0)) {
 293     ERR("low-biased gamma ramp (%d), rejected\n", f);
 294     return FALSE;
 295   }
 296   /* check that the gamma is reasonably uniform across the ramp */
 297   if (g_max - g_min > 0.1) {
 298     ERR("ramp not uniform (max=%f, min=%f, avg=%f), rejected\n", g_max, g_min, g_avg);
 299     return FALSE;
 300   }
 301   /* ok, now we're pretty sure we can set the desired gamma ramp,
 302    * so go for it */
 303   *gamma = 1/g_avg;
 304   return TRUE;
 305 }
 306
 307 #endif /* X_XF86VidModeSetGamma */
 308
 309 /* Hmm... should gamma control be available in desktop mode or not?
 310  * I'll assume that it should */
 311
 312 BOOL X11DRV_XF86VM_GetGammaRamp(LPDDGAMMARAMP ramp)
 313 {
 314 #ifdef X_XF86VidModeSetGamma
 315   XF86VidModeGamma gamma;
 316   Bool ret;
 317
 318   if (xf86vm_major < 2) return FALSE; /* no gamma control */
 319 #ifdef X_XF86VidModeSetGammaRamp
 320   else if (xf86vm_use_gammaramp)
 321   {
 322       Bool ret;
 323       wine_tsx11_lock();
 324       ret = XF86VidModeGetGammaRamp(gdi_display, DefaultScreen(gdi_display), 256,
 325                                     ramp->red, ramp->green, ramp->blue);
 326       wine_tsx11_unlock();
 327       return ret;
 328   }
 329 #endif
 330   else
 331   {
 332       wine_tsx11_lock();
 333       ret = XF86VidModeGetGamma(gdi_display, DefaultScreen(gdi_display), &gamma);
 334       wine_tsx11_unlock();
 335       if (ret) {
 336           GenerateRampFromGamma(ramp->red,   gamma.red);
 337           GenerateRampFromGamma(ramp->green, gamma.green);
 338           GenerateRampFromGamma(ramp->blue,  gamma.blue);
 339           return TRUE;
 340       }
 341   }
 342 #endif /* X_XF86VidModeSetGamma */
 343   return FALSE;
 344 }
 345
 346 BOOL X11DRV_XF86VM_SetGammaRamp(LPDDGAMMARAMP ramp)
 347 {
 348 #ifdef X_XF86VidModeSetGamma
 349   XF86VidModeGamma gamma;
 350
 351   if (xf86vm_major < 2) return FALSE; /* no gamma control */
 352 #ifdef X_XF86VidModeSetGammaRamp
 353   else if (xf86vm_use_gammaramp)
 354   {
 355       Bool ret;
 356       wine_tsx11_lock();
 357       ret = XF86VidModeSetGammaRamp(gdi_display, DefaultScreen(gdi_display), 256,
 358                                     ramp->red, ramp->green, ramp->blue);
 359       wine_tsx11_unlock();
 360       return ret;
 361   }
 362 #endif
 363   else
 364   {
 365       if (ComputeGammaFromRamp(ramp->red,   &gamma.red) &&
 366           ComputeGammaFromRamp(ramp->green, &gamma.green) &&
 367           ComputeGammaFromRamp(ramp->blue,  &gamma.blue)) {
 368           Bool ret;
 369           wine_tsx11_lock();
 370           ret = XF86VidModeSetGamma(gdi_display, DefaultScreen(gdi_display), &gamma);
 371           wine_tsx11_unlock();
 372           return ret;
 373       }
 374   }
 375 #endif /* X_XF86VidModeSetGamma */
 376   return FALSE;
 377 }
 378
 379 #endif /* HAVE_LIBXXF86VM */
 380
 381 /***********************************************************************
 382  *              GetDeviceGammaRamp (X11DRV.@)
 383  *
 384  * FIXME: should move to somewhere appropriate, but probably not before
 385  * the stuff in graphics/x11drv/ has been moved to dlls/x11drv, so that
 386  * they can include xvidmode.h directly
 387  */
 388 BOOL X11DRV_GetDeviceGammaRamp(X11DRV_PDEVICE *physDev, LPVOID ramp)
 389 {
 390 #ifdef HAVE_LIBXXF86VM
 391   return X11DRV_XF86VM_GetGammaRamp(ramp);
 392 #else
 393   return FALSE;
 394 #endif
 395 }
 396
 397 /***********************************************************************
 398  *              SetDeviceGammaRamp (X11DRV.@)
 399  *
 400  * FIXME: should move to somewhere appropriate, but probably not before
 401  * the stuff in graphics/x11drv/ has been moved to dlls/x11drv, so that
 402  * they can include xvidmode.h directly
 403  */
 404 BOOL X11DRV_SetDeviceGammaRamp(X11DRV_PDEVICE *physDev, LPVOID ramp)
 405 {
 406 #ifdef HAVE_LIBXXF86VM
 407   return X11DRV_XF86VM_SetGammaRamp(ramp);
 408 #else
 409   return FALSE;
 410 #endif
 411 }