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