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 /* FIXME: ChangeDisplaySettings ought to be able to use this */
  22
  23 #include "config.h"
  24 #include <string.h>
  25
  26 #include "ts_xlib.h"
  27 #include "ts_xf86vmode.h"
  28 #include "x11drv.h"
  29 #include "x11ddraw.h"
  30 #include "xvidmode.h"
  31
  32 #include "windef.h"
  33 #include "wingdi.h"
  34 #include "ddrawi.h"
  35 #include "wine/debug.h"
  36
  37 WINE_DEFAULT_DEBUG_CHANNEL(x11drv);
  38
  39 #ifdef HAVE_LIBXXF86VM
  40
  41 extern int usexvidmode;
  42
  43 static int xf86vm_event, xf86vm_error, xf86vm_major, xf86vm_minor;
  44
  45 #ifdef X_XF86VidModeSetGammaRamp
  46 static int xf86vm_gammaramp_size;
  47 static BOOL xf86vm_use_gammaramp;
  48 #endif
  49
  50 LPDDHALMODEINFO xf86vm_modes;
  51 unsigned xf86vm_mode_count;
  52 XF86VidModeModeInfo** modes;
  53
  54 static void convert_modeinfo( const XF86VidModeModeInfo *mode, LPDDHALMODEINFO info )
  55 {
  56   info->dwWidth      = mode->hdisplay;
  57   info->dwHeight     = mode->vdisplay;
  58   if (mode->htotal!=0 && mode->vtotal!=0)
  59       info->wRefreshRate = mode->dotclock * 1000 / (mode->htotal * mode->vtotal);
  60   else
  61       info->wRefreshRate = 0;
  62   TRACE(" width=%ld, height=%ld, refresh=%d\n",
  63         info->dwWidth, info->dwHeight, info->wRefreshRate);
  64   /* XVidMode cannot change display depths... */
  65   /* let's not bother with filling out these then... */
  66   info->lPitch         = 0;
  67   info->dwBPP          = 0;
  68   info->wFlags         = 0;
  69   info->dwRBitMask     = 0;
  70   info->dwGBitMask     = 0;
  71   info->dwBBitMask     = 0;
  72   info->dwAlphaBitMask = 0;
  73 }
  74
  75 static void convert_modeline(int dotclock, const XF86VidModeModeLine *mode, LPDDHALMODEINFO info)
  76 {
  77   info->dwWidth      = mode->hdisplay;
  78   info->dwHeight     = mode->vdisplay;
  79   if (mode->htotal!=0 && mode->vtotal!=0)
  80       info->wRefreshRate = dotclock * 1000 / (mode->htotal * mode->vtotal);
  81   else
  82       info->wRefreshRate = 0;
  83   TRACE(" width=%ld, height=%ld, refresh=%d\n",
  84         info->dwWidth, info->dwHeight, info->wRefreshRate);
  85   /* XVidMode cannot change display depths... */
  86   /* let's not bother with filling out these then... */
  87   info->lPitch         = 0;
  88   info->dwBPP          = 0;
  89   info->wFlags         = 0;
  90   info->dwRBitMask     = 0;
  91   info->dwGBitMask     = 0;
  92   info->dwBBitMask     = 0;
  93   info->dwAlphaBitMask = 0;
  94 }
  95
  96 void X11DRV_XF86VM_Init(void)
  97 {
  98   int nmodes, i;
  99
 100   if (xf86vm_major) return; /* already initialized? */
 101
 102   /* if in desktop mode, don't use XVidMode */
 103   if (root_window != DefaultRootWindow(gdi_display)) return;
 104
 105   if (!usexvidmode) return;
 106
 107   /* see if XVidMode is available */
 108   if (!TSXF86VidModeQueryExtension(gdi_display, &xf86vm_event, &xf86vm_error)) return;
 109   if (!TSXF86VidModeQueryVersion(gdi_display, &xf86vm_major, &xf86vm_minor)) return;
 110
 111 #ifdef X_XF86VidModeSetGammaRamp
 112   if (xf86vm_major > 2 || (xf86vm_major == 2 && xf86vm_minor >= 1))
 113   {
 114       wine_tsx11_lock();
 115       XF86VidModeGetGammaRampSize(gdi_display, DefaultScreen(gdi_display),
 116                                   &xf86vm_gammaramp_size);
 117       wine_tsx11_unlock();
 118
 119       if (xf86vm_gammaramp_size == 256)
 120           xf86vm_use_gammaramp = TRUE;
 121   }
 122 #endif
 123
 124   /* retrieve modes */
 125   if (!TSXF86VidModeGetAllModeLines(gdi_display, DefaultScreen(gdi_display), &nmodes,
 126                                     &modes))
 127     return;
 128
 129   TRACE("XVidMode modes: count=%d\n", nmodes);
 130
 131   xf86vm_mode_count = nmodes;
 132   xf86vm_modes = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(DDHALMODEINFO) * nmodes);
 133
 134   /* convert modes to DDHALMODEINFO format */
 135   for (i=0; i<nmodes; i++)
 136     convert_modeinfo(modes[i], &xf86vm_modes[i]);
 137
 138   TRACE("Enabling XVidMode\n");
 139 }
 140
 141 void X11DRV_XF86VM_Cleanup(void)
 142 {
 143   if (modes) TSXFree(modes);
 144 }
 145
 146 int X11DRV_XF86VM_GetCurrentMode(void)
 147 {
 148   XF86VidModeModeLine line;
 149   int dotclock, i;
 150   DDHALMODEINFO cmode;
 151
 152   if (!xf86vm_modes) return 0; /* no XVidMode */
 153
 154   TRACE("Querying XVidMode current mode\n");
 155   TSXF86VidModeGetModeLine(gdi_display, DefaultScreen(gdi_display), &dotclock, &line);
 156   convert_modeline(dotclock, &line, &cmode);
 157   for (i=0; i<xf86vm_mode_count; i++)
 158     if (memcmp(&xf86vm_modes[i], &cmode, sizeof(cmode)) == 0) {
 159       TRACE("mode=%d\n", i);
 160       return i;
 161     }
 162   ERR("unknown mode, shouldn't happen\n");
 163   return 0; /* return first mode */
 164 }
 165
 166 void X11DRV_XF86VM_SetCurrentMode(int mode)
 167 {
 168   if (!xf86vm_modes) return; /* no XVidMode */
 169
 170   TSXF86VidModeSwitchToMode(gdi_display, DefaultScreen(gdi_display), modes[mode]);
 171 #if 0 /* it is said that SetViewPort causes problems with some X servers */
 172   TSXF86VidModeSetViewPort(gdi_display, DefaultScreen(gdi_display), 0, 0);
 173 #else
 174   TSXWarpPointer(gdi_display, None, DefaultRootWindow(gdi_display), 0, 0, 0, 0, 0, 0);
 175 #endif
 176   TSXSync(gdi_display, False);
 177 }
 178
 179 void X11DRV_XF86VM_SetExclusiveMode(int lock)
 180 {
 181   if (!xf86vm_modes) return; /* no XVidMode */
 182
 183   TSXF86VidModeLockModeSwitch(gdi_display, DefaultScreen(gdi_display), lock);
 184 }
 185
 186 /* actual DirectDraw HAL stuff */
 187
 188 static DWORD PASCAL X11DRV_XF86VM_SetMode(LPDDHAL_SETMODEDATA data)
 189 {
 190   X11DRV_XF86VM_SetCurrentMode(data->dwModeIndex);
 191   X11DRV_DDHAL_SwitchMode(data->dwModeIndex, NULL, NULL);
 192   data->ddRVal = DD_OK;
 193   return DDHAL_DRIVER_HANDLED;
 194 }
 195
 196 int X11DRV_XF86VM_CreateDriver(LPDDHALINFO info)
 197 {
 198   if (!xf86vm_mode_count) return 0; /* no XVidMode */
 199
 200   info->dwNumModes = xf86vm_mode_count;
 201   info->lpModeInfo = xf86vm_modes;
 202   X11DRV_DDHAL_SwitchMode(X11DRV_XF86VM_GetCurrentMode(), NULL, NULL);
 203   info->lpDDCallbacks->SetMode = X11DRV_XF86VM_SetMode;
 204   return TRUE;
 205 }
 206
 207
 208 /***** GAMMA CONTROL *****/
 209 /* (only available in XF86VidMode 2.x) */
 210
 211 #ifdef X_XF86VidModeSetGamma
 212
 213 static void GenerateRampFromGamma(WORD ramp[256], float gamma)
 214 {
 215   float r_gamma = 1/gamma;
 216   unsigned i;
 217   TRACE("gamma is %f\n", r_gamma);
 218   for (i=0; i<256; i++)
 219     ramp[i] = pow(i/255.0, r_gamma) * 65535.0;
 220 }
 221
 222 static BOOL ComputeGammaFromRamp(WORD ramp[256], float *gamma)
 223 {
 224   float r_x, r_y, r_lx, r_ly, r_d, r_v, r_e, g_avg, g_min, g_max;
 225   unsigned i, f, l, g_n, c;
 226   f = ramp[0];
 227   l = ramp[255];
 228   if (f >= l) {
 229     ERR("inverted or flat gamma ramp (%d->%d), rejected\n", f, l);
 230     return FALSE;
 231   }
 232   r_d = l - f;
 233   g_min = g_max = g_avg = 0.0;
 234   /* check gamma ramp entries to estimate the gamma */
 235   TRACE("analyzing gamma ramp (%d->%d)\n", f, l);
 236   for (i=1, g_n=0; i<255; i++) {
 237     if (ramp[i] < f || ramp[i] > l) {
 238       ERR("strange gamma ramp ([%d]=%d for %d->%d), rejected\n", i, ramp[i], f, l);
 239       return FALSE;
 240     }
 241     c = ramp[i] - f;
 242     if (!c) continue; /* avoid log(0) */
 243
 244     /* normalize entry values into 0..1 range */
 245     r_x = i/255.0; r_y = c / r_d;
 246     /* compute logarithms of values */
 247     r_lx = log(r_x); r_ly = log(r_y);
 248     /* compute gamma for this entry */
 249     r_v = r_ly / r_lx;
 250     /* compute differential (error estimate) for this entry */
 251     /* some games use table-based logarithms that magnifies the error by 128 */
 252     r_e = -r_lx * 128 / (c * r_lx * r_lx);
 253
 254     /* compute min & max while compensating for estimated error */
 255     if (!g_n || g_min > (r_v + r_e)) g_min = r_v + r_e;
 256     if (!g_n || g_max < (r_v - r_e)) g_max = r_v - r_e;
 257
 258     /* add to average */
 259     g_avg += r_v;
 260     g_n++;
 261     /* TRACE("[%d]=%d, gamma=%f, error=%f\n", i, ramp[i], r_v, r_e); */
 262   }
 263   if (!g_n) {
 264     ERR("no gamma data, shouldn't happen\n");
 265     return FALSE;
 266   }
 267   g_avg /= g_n;
 268   TRACE("low bias is %d, high is %d, gamma is %5.3f\n", f, 65535-l, g_avg);
 269   /* the bias could be because the app wanted something like a "red shift"
 270    * like when you're hit in Quake, but XVidMode doesn't support it,
 271    * so we have to reject a significant bias */
 272   if (f && f > (pow(1/255.0, g_avg) * 65536.0)) {
 273     ERR("low-biased gamma ramp (%d), rejected\n", f);
 274     return FALSE;
 275   }
 276   /* check that the gamma is reasonably uniform across the ramp */
 277   if (g_max - g_min > 0.1) {
 278     ERR("ramp not uniform (max=%f, min=%f, avg=%f), rejected\n", g_max, g_min, g_avg);
 279     return FALSE;
 280   }
 281   /* ok, now we're pretty sure we can set the desired gamma ramp,
 282    * so go for it */
 283   *gamma = 1/g_avg;
 284   return TRUE;
 285 }
 286
 287 #endif /* X_XF86VidModeSetGamma */
 288
 289 /* Hmm... should gamma control be available in desktop mode or not?
 290  * I'll assume that it should */
 291
 292 BOOL X11DRV_XF86VM_GetGammaRamp(LPDDGAMMARAMP ramp)
 293 {
 294 #ifdef X_XF86VidModeSetGamma
 295   XF86VidModeGamma gamma;
 296   Bool ret;
 297
 298   if (xf86vm_major < 2) return FALSE; /* no gamma control */
 299 #ifdef X_XF86VidModeSetGammaRamp
 300   else if (xf86vm_use_gammaramp)
 301   {
 302       Bool ret;
 303       wine_tsx11_lock();
 304       ret = XF86VidModeGetGammaRamp(gdi_display, DefaultScreen(gdi_display), 256,
 305                                     ramp->red, ramp->green, ramp->blue);
 306       wine_tsx11_unlock();
 307       return ret;
 308   }
 309 #endif
 310   else
 311   {
 312       wine_tsx11_lock();
 313       ret = XF86VidModeGetGamma(gdi_display, DefaultScreen(gdi_display), &gamma);
 314       wine_tsx11_unlock();
 315       if (ret) {
 316           GenerateRampFromGamma(ramp->red,   gamma.red);
 317           GenerateRampFromGamma(ramp->green, gamma.green);
 318           GenerateRampFromGamma(ramp->blue,  gamma.blue);
 319           return TRUE;
 320       }
 321   }
 322 #endif /* X_XF86VidModeSetGamma */
 323   return FALSE;
 324 }
 325
 326 BOOL X11DRV_XF86VM_SetGammaRamp(LPDDGAMMARAMP ramp)
 327 {
 328 #ifdef X_XF86VidModeSetGamma
 329   XF86VidModeGamma gamma;
 330
 331   if (xf86vm_major < 2) return FALSE; /* no gamma control */
 332 #ifdef X_XF86VidModeSetGammaRamp
 333   else if (xf86vm_use_gammaramp)
 334   {
 335       Bool ret;
 336       wine_tsx11_lock();
 337       ret = XF86VidModeSetGammaRamp(gdi_display, DefaultScreen(gdi_display), 256,
 338                                     ramp->red, ramp->green, ramp->blue);
 339       wine_tsx11_unlock();
 340       return ret;
 341   }
 342 #endif
 343   else
 344   {
 345       if (ComputeGammaFromRamp(ramp->red,   &gamma.red) &&
 346           ComputeGammaFromRamp(ramp->green, &gamma.green) &&
 347           ComputeGammaFromRamp(ramp->blue,  &gamma.blue)) {
 348           Bool ret;
 349           wine_tsx11_lock();
 350           ret = XF86VidModeSetGamma(gdi_display, DefaultScreen(gdi_display), &gamma);
 351           wine_tsx11_unlock();
 352           return ret;
 353       }
 354   }
 355 #endif /* X_XF86VidModeSetGamma */
 356   return FALSE;
 357 }
 358
 359 #endif /* HAVE_LIBXXF86VM */
 360
 361 /***********************************************************************
 362  *              GetDeviceGammaRamp (X11DRV.@)
 363  *
 364  * FIXME: should move to somewhere appropriate, but probably not before
 365  * the stuff in graphics/x11drv/ has been moved to dlls/x11drv, so that
 366  * they can include xvidmode.h directly
 367  */
 368 BOOL X11DRV_GetDeviceGammaRamp(X11DRV_PDEVICE *physDev, LPVOID ramp)
 369 {
 370 #ifdef HAVE_LIBXXF86VM
 371   return X11DRV_XF86VM_GetGammaRamp(ramp);
 372 #else
 373   return FALSE;
 374 #endif
 375 }
 376
 377 /***********************************************************************
 378  *              SetDeviceGammaRamp (X11DRV.@)
 379  *
 380  * FIXME: should move to somewhere appropriate, but probably not before
 381  * the stuff in graphics/x11drv/ has been moved to dlls/x11drv, so that
 382  * they can include xvidmode.h directly
 383  */
 384 BOOL X11DRV_SetDeviceGammaRamp(X11DRV_PDEVICE *physDev, LPVOID ramp)
 385 {
 386 #ifdef HAVE_LIBXXF86VM
 387   return X11DRV_XF86VM_SetGammaRamp(ramp);
 388 #else
 389   return FALSE;
 390 #endif
 391 }