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
  25 #include <X11/Xlib.h>
  26
  27 #ifdef HAVE_LIBXXF86VM
  28 #define XMD_H
  29 #include "basetsd.h"
  30 #include <X11/extensions/xf86vmode.h>
  31 #include "x11drv.h"
  32
  33 #include "x11ddraw.h"
  34 #include "xvidmode.h"
  35
  36 #include "windef.h"
  37 #include "wingdi.h"
  38 #include "ddrawi.h"
  39 #include "wine/debug.h"
  40
  41 WINE_DEFAULT_DEBUG_CHANNEL(xvidmode);
  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 static unsigned int xf86vm_initial_mode = 0;
  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 static Bool in_desktop_mode;
  93
  94 int X11DRV_XF86VM_GetCurrentMode(void)
  95 {
  96   XF86VidModeModeLine line;
  97   int dotclock, i;
  98   DDHALMODEINFO cmode;
  99   DWORD dwBpp = screen_depth;
 100   if (dwBpp == 24) dwBpp = 32;
 101
 102   TRACE("Querying XVidMode current mode\n");
 103   wine_tsx11_lock();
 104   XF86VidModeGetModeLine(gdi_display, DefaultScreen(gdi_display), &dotclock, &line);
 105   wine_tsx11_unlock();
 106   convert_modeline(dotclock, &line, &cmode, dwBpp);
 107   for (i=0; i<dd_mode_count; i++)
 108     if (memcmp(&dd_modes[i], &cmode, sizeof(cmode)) == 0) {
 109       TRACE("mode=%d\n", i);
 110       return i;
 111     }
 112   ERR("In unknown mode, returning default\n");
 113   return xf86vm_initial_mode;
 114 }
 115
 116 void X11DRV_XF86VM_SetCurrentMode(int mode)
 117 {
 118   DWORD dwBpp = screen_depth;
 119   if (dwBpp == 24) dwBpp = 32;
 120   /* only set modes from the original color depth */
 121   if (dwBpp != dd_modes[mode].dwBPP)
 122   {
 123       FIXME("Cannot change screen BPP from %ld to %ld\n", dwBpp, dd_modes[mode].dwBPP);
 124   }
 125   mode = mode % real_xf86vm_mode_count;
 126
 127   wine_tsx11_lock();
 128   TRACE("Resizing X display to %dx%d\n",
 129         real_xf86vm_modes[mode]->hdisplay, real_xf86vm_modes[mode]->vdisplay);
 130   XF86VidModeSwitchToMode(gdi_display, DefaultScreen(gdi_display), real_xf86vm_modes[mode]);
 131 #if 0 /* FIXME */
 132   SYSMETRICS_Set( SM_CXSCREEN, real_xf86vm_modes[mode]->hdisplay );
 133   SYSMETRICS_Set( SM_CYSCREEN, real_xf86vm_modes[mode]->vdisplay );
 134 #else
 135   FIXME("Need to update SYSMETRICS after resizing display (now %dx%d)\n",
 136         real_xf86vm_modes[mode]->hdisplay, real_xf86vm_modes[mode]->vdisplay);
 137 #endif
 138 #if 0 /* it is said that SetViewPort causes problems with some X servers */
 139   XF86VidModeSetViewPort(gdi_display, DefaultScreen(gdi_display), 0, 0);
 140 #else
 141   XWarpPointer(gdi_display, None, DefaultRootWindow(gdi_display), 0, 0, 0, 0, 0, 0);
 142 #endif
 143   XSync(gdi_display, False);
 144   wine_tsx11_unlock();
 145 }
 146
 147 void X11DRV_XF86VM_Init(void)
 148 {
 149   Bool ok;
 150   int nmodes, i;
 151   DWORD dwBpp = screen_depth;
 152   if (dwBpp == 24) dwBpp = 32;
 153
 154   in_desktop_mode = (root_window != DefaultRootWindow(gdi_display));
 155
 156   if (xf86vm_major) return; /* already initialized? */
 157
 158   if (!usexvidmode) return;
 159
 160   /* see if XVidMode is available */
 161   wine_tsx11_lock();
 162   ok = XF86VidModeQueryExtension(gdi_display, &xf86vm_event, &xf86vm_error);
 163   if (ok)
 164   {
 165       X11DRV_expect_error(gdi_display, XVidModeErrorHandler, NULL);
 166       ok = XF86VidModeQueryVersion(gdi_display, &xf86vm_major, &xf86vm_minor);
 167       if (X11DRV_check_error()) ok = FALSE;
 168   }
 169   if (ok)
 170   {
 171 #ifdef X_XF86VidModeSetGammaRamp
 172       if (xf86vm_major > 2 || (xf86vm_major == 2 && xf86vm_minor >= 1))
 173       {
 174           XF86VidModeGetGammaRampSize(gdi_display, DefaultScreen(gdi_display),
 175                                       &xf86vm_gammaramp_size);
 176           if (xf86vm_gammaramp_size == 256)
 177               xf86vm_use_gammaramp = TRUE;
 178       }
 179 #endif /* X_XF86VidModeSetGammaRamp */
 180
 181       /* retrieve modes */
 182       if (!in_desktop_mode) ok = XF86VidModeGetAllModeLines(gdi_display, DefaultScreen(gdi_display), &nmodes, &real_xf86vm_modes);
 183   }
 184   wine_tsx11_unlock();
 185   if (!ok) return;
 186
 187   /* In desktop mode, do not switch resolution... But still use the Gamma ramp stuff */
 188   if (in_desktop_mode) return;
 189
 190   TRACE("XVidMode modes: count=%d\n", nmodes);
 191
 192   real_xf86vm_mode_count = nmodes;
 193
 194   dd_modes = X11DRV_Settings_SetHandlers("XF86VidMode",
 195                                          X11DRV_XF86VM_GetCurrentMode,
 196                                          X11DRV_XF86VM_SetCurrentMode,
 197                                          nmodes, 1);
 198
 199   /* convert modes to DDHALMODEINFO format */
 200   for (i=0; i<real_xf86vm_mode_count; i++)
 201   {
 202       convert_modeinfo(real_xf86vm_modes[i]);
 203   }
 204   /* add modes for different color depths */
 205   X11DRV_Settings_AddDepthModes();
 206   dd_mode_count = X11DRV_Settings_GetModeCount();
 207
 208   TRACE("Available DD modes: count=%d\n", dd_mode_count);
 209
 210   /* store the current mode at the time we started */
 211   xf86vm_initial_mode = X11DRV_XF86VM_GetCurrentMode();
 212   X11DRV_Settings_SetDefaultMode(xf86vm_initial_mode);
 213
 214   TRACE("Enabling XVidMode\n");
 215 }
 216
 217 void X11DRV_XF86VM_Cleanup(void)
 218 {
 219   wine_tsx11_lock();
 220   if (real_xf86vm_modes) XFree(real_xf86vm_modes);
 221   wine_tsx11_unlock();
 222 }
 223
 224 void X11DRV_XF86VM_SetExclusiveMode(int lock)
 225 {
 226   if (!dd_modes) return; /* no XVidMode */
 227
 228   wine_tsx11_lock();
 229   XF86VidModeLockModeSwitch(gdi_display, DefaultScreen(gdi_display), lock);
 230   wine_tsx11_unlock();
 231 }
 232
 233 /***** GAMMA CONTROL *****/
 234 /* (only available in XF86VidMode 2.x) */
 235
 236 #ifdef X_XF86VidModeSetGamma
 237
 238 static void GenerateRampFromGamma(WORD ramp[256], float gamma)
 239 {
 240   float r_gamma = 1/gamma;
 241   unsigned i;
 242   TRACE("gamma is %f\n", r_gamma);
 243   for (i=0; i<256; i++)
 244     ramp[i] = pow(i/255.0, r_gamma) * 65535.0;
 245 }
 246
 247 static BOOL ComputeGammaFromRamp(WORD ramp[256], float *gamma)
 248 {
 249   float r_x, r_y, r_lx, r_ly, r_d, r_v, r_e, g_avg, g_min, g_max;
 250   unsigned i, f, l, g_n, c;
 251   f = ramp[0];
 252   l = ramp[255];
 253   if (f >= l) {
 254     ERR("inverted or flat gamma ramp (%d->%d), rejected\n", f, l);
 255     return FALSE;
 256   }
 257   r_d = l - f;
 258   g_min = g_max = g_avg = 0.0;
 259   /* check gamma ramp entries to estimate the gamma */
 260   TRACE("analyzing gamma ramp (%d->%d)\n", f, l);
 261   for (i=1, g_n=0; i<255; i++) {
 262     if (ramp[i] < f || ramp[i] > l) {
 263       ERR("strange gamma ramp ([%d]=%d for %d->%d), rejected\n", i, ramp[i], f, l);
 264       return FALSE;
 265     }
 266     c = ramp[i] - f;
 267     if (!c) continue; /* avoid log(0) */
 268
 269     /* normalize entry values into 0..1 range */
 270     r_x = i/255.0; r_y = c / r_d;
 271     /* compute logarithms of values */
 272     r_lx = log(r_x); r_ly = log(r_y);
 273     /* compute gamma for this entry */
 274     r_v = r_ly / r_lx;
 275     /* compute differential (error estimate) for this entry */
 276     /* some games use table-based logarithms that magnifies the error by 128 */
 277     r_e = -r_lx * 128 / (c * r_lx * r_lx);
 278
 279     /* compute min & max while compensating for estimated error */
 280     if (!g_n || g_min > (r_v + r_e)) g_min = r_v + r_e;
 281     if (!g_n || g_max < (r_v - r_e)) g_max = r_v - r_e;
 282
 283     /* add to average */
 284     g_avg += r_v;
 285     g_n++;
 286     /* TRACE("[%d]=%d, gamma=%f, error=%f\n", i, ramp[i], r_v, r_e); */
 287   }
 288   if (!g_n) {
 289     ERR("no gamma data, shouldn't happen\n");
 290     return FALSE;
 291   }
 292   g_avg /= g_n;
 293   TRACE("low bias is %d, high is %d, gamma is %5.3f\n", f, 65535-l, g_avg);
 294   /* the bias could be because the app wanted something like a "red shift"
 295    * like when you're hit in Quake, but XVidMode doesn't support it,
 296    * so we have to reject a significant bias */
 297   if (f && f > (pow(1/255.0, g_avg) * 65536.0)) {
 298     ERR("low-biased gamma ramp (%d), rejected\n", f);
 299     return FALSE;
 300   }
 301   /* check that the gamma is reasonably uniform across the ramp */
 302   if (g_max - g_min > 0.1) {
 303     ERR("ramp not uniform (max=%f, min=%f, avg=%f), rejected\n", g_max, g_min, g_avg);
 304     return FALSE;
 305   }
 306   /* ok, now we're pretty sure we can set the desired gamma ramp,
 307    * so go for it */
 308   *gamma = 1/g_avg;
 309   return TRUE;
 310 }
 311
 312 #endif /* X_XF86VidModeSetGamma */
 313
 314 /* Hmm... should gamma control be available in desktop mode or not?
 315  * I'll assume that it should */
 316
 317 BOOL X11DRV_XF86VM_GetGammaRamp(LPDDGAMMARAMP ramp)
 318 {
 319 #ifdef X_XF86VidModeSetGamma
 320   XF86VidModeGamma gamma;
 321   Bool ret;
 322
 323   if (xf86vm_major < 2) return FALSE; /* no gamma control */
 324 #ifdef X_XF86VidModeSetGammaRamp
 325   else if (xf86vm_use_gammaramp)
 326   {
 327       Bool ret;
 328       wine_tsx11_lock();
 329       ret = XF86VidModeGetGammaRamp(gdi_display, DefaultScreen(gdi_display), 256,
 330                                     ramp->red, ramp->green, ramp->blue);
 331       wine_tsx11_unlock();
 332       return ret;
 333   }
 334 #endif
 335   else
 336   {
 337       wine_tsx11_lock();
 338       ret = XF86VidModeGetGamma(gdi_display, DefaultScreen(gdi_display), &gamma);
 339       wine_tsx11_unlock();
 340       if (ret) {
 341           GenerateRampFromGamma(ramp->red,   gamma.red);
 342           GenerateRampFromGamma(ramp->green, gamma.green);
 343           GenerateRampFromGamma(ramp->blue,  gamma.blue);
 344           return TRUE;
 345       }
 346   }
 347 #endif /* X_XF86VidModeSetGamma */
 348   return FALSE;
 349 }
 350
 351 BOOL X11DRV_XF86VM_SetGammaRamp(LPDDGAMMARAMP ramp)
 352 {
 353 #ifdef X_XF86VidModeSetGamma
 354   XF86VidModeGamma gamma;
 355
 356   if (xf86vm_major < 2) return FALSE; /* no gamma control */
 357 #ifdef X_XF86VidModeSetGammaRamp
 358   else if (xf86vm_use_gammaramp)
 359   {
 360       Bool ret;
 361       wine_tsx11_lock();
 362       ret = XF86VidModeSetGammaRamp(gdi_display, DefaultScreen(gdi_display), 256,
 363                                     ramp->red, ramp->green, ramp->blue);
 364       wine_tsx11_unlock();
 365       return ret;
 366   }
 367 #endif
 368   else
 369   {
 370       if (ComputeGammaFromRamp(ramp->red,   &gamma.red) &&
 371           ComputeGammaFromRamp(ramp->green, &gamma.green) &&
 372           ComputeGammaFromRamp(ramp->blue,  &gamma.blue)) {
 373           Bool ret;
 374           wine_tsx11_lock();
 375           ret = XF86VidModeSetGamma(gdi_display, DefaultScreen(gdi_display), &gamma);
 376           wine_tsx11_unlock();
 377           return ret;
 378       }
 379   }
 380 #endif /* X_XF86VidModeSetGamma */
 381   return FALSE;
 382 }
 383
 384 #endif /* HAVE_LIBXXF86VM */
 385
 386 /***********************************************************************
 387  *              GetDeviceGammaRamp (X11DRV.@)
 388  *
 389  * FIXME: should move to somewhere appropriate, but probably not before
 390  * the stuff in graphics/x11drv/ has been moved to dlls/x11drv, so that
 391  * they can include xvidmode.h directly
 392  */
 393 BOOL X11DRV_GetDeviceGammaRamp(X11DRV_PDEVICE *physDev, LPVOID ramp)
 394 {
 395 #ifdef HAVE_LIBXXF86VM
 396   return X11DRV_XF86VM_GetGammaRamp(ramp);
 397 #else
 398   return FALSE;
 399 #endif
 400 }
 401
 402 /***********************************************************************
 403  *              SetDeviceGammaRamp (X11DRV.@)
 404  *
 405  * FIXME: should move to somewhere appropriate, but probably not before
 406  * the stuff in graphics/x11drv/ has been moved to dlls/x11drv, so that
 407  * they can include xvidmode.h directly
 408  */
 409 BOOL X11DRV_SetDeviceGammaRamp(X11DRV_PDEVICE *physDev, LPVOID ramp)
 410 {
 411 #ifdef HAVE_LIBXXF86VM
 412   return X11DRV_XF86VM_SetGammaRamp(ramp);
 413 #else
 414   return FALSE;
 415 #endif
 416 }