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