git.sesse.net Git - vlc/blob - modules/video_output/msw/common.c

   1 /*****************************************************************************
   2  * common.c: Windows video output common code
   3  *****************************************************************************
   4  * Copyright (C) 2001-2009 VLC authors and VideoLAN
   5  * $Id$
   6  *
   7  * Authors: Gildas Bazin <gbazin@videolan.org>
   8  *
   9  * This program is free software; you can redistribute it and/or modify it
  10  * under the terms of the GNU Lesser General Public License as published by
  11  * the Free Software Foundation; either version 2.1 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  17  * GNU Lesser General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU Lesser General Public License
  20  * along with this program; if not, write to the Free Software Foundation,
  21  * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  22  *****************************************************************************/
  23
  24 /*****************************************************************************
  25  * Preamble: This file contains the functions related to the init of the vout
  26  *           structure, the common display code, the screensaver, but not the
  27  *           events and the Window Creation (events.c)
  28  *****************************************************************************/
  29
  30 #ifdef HAVE_CONFIG_H
  31 # include "config.h"
  32 #endif
  33
  34 #include <vlc_common.h>
  35 #include <vlc_vout_display.h>
  36
  37 #include <windows.h>
  38 #include <assert.h>
  39
  40 #include "common.h"
  41
  42 #include <vlc_windows_interfaces.h>
  43
  44 static void CommonChangeThumbnailClip(vout_display_t *, bool show);
  45 static int  CommonControlSetFullscreen(vout_display_t *, bool is_fullscreen);
  46
  47 static void DisableScreensaver(vout_display_t *);
  48 static void RestoreScreensaver(vout_display_t *);
  49
  50 /* */
  51 int CommonInit(vout_display_t *vd)
  52 {
  53     vout_display_sys_t *sys = vd->sys;
  54
  55     sys->hwnd      = NULL;
  56     sys->hvideownd = NULL;
  57     sys->hparent   = NULL;
  58     sys->hfswnd    = NULL;
  59     sys->changes   = 0;
  60     SetRectEmpty(&sys->rect_display);
  61     SetRectEmpty(&sys->rect_parent);
  62     sys->is_first_display = true;
  63     sys->is_on_top = false;
  64
  65     var_Create(vd, "video-deco", VLC_VAR_BOOL | VLC_VAR_DOINHERIT);
  66     var_Create(vd, "disable-screensaver", VLC_VAR_BOOL | VLC_VAR_DOINHERIT);
  67
  68     /* */
  69     sys->event = EventThreadCreate(vd);
  70     if (!sys->event)
  71         return VLC_EGENERIC;
  72
  73     event_cfg_t cfg;
  74     memset(&cfg, 0, sizeof(cfg));
  75 #ifdef MODULE_NAME_IS_direct3d
  76     cfg.use_desktop = sys->use_desktop;
  77 #endif
  78 #ifdef MODULE_NAME_IS_directdraw
  79     cfg.use_overlay = sys->use_overlay;
  80 #endif
  81     cfg.x      = var_InheritInteger(vd, "video-x");
  82     cfg.y      = var_InheritInteger(vd, "video-y");
  83     cfg.width  = vd->cfg->display.width;
  84     cfg.height = vd->cfg->display.height;
  85
  86     event_hwnd_t hwnd;
  87     if (EventThreadStart(sys->event, &hwnd, &cfg))
  88         return VLC_EGENERIC;
  89
  90     sys->parent_window = hwnd.parent_window;
  91     sys->hparent       = hwnd.hparent;
  92     sys->hwnd          = hwnd.hwnd;
  93     sys->hvideownd     = hwnd.hvideownd;
  94     sys->hfswnd        = hwnd.hfswnd;
  95
  96     if (vd->cfg->is_fullscreen) {
  97         if (CommonControlSetFullscreen(vd, true))
  98             vout_display_SendEventFullscreen(vd, false);
  99     }
 100
 101     DisableScreensaver (vd);
 102
 103     return VLC_SUCCESS;
 104 }
 105
 106 /* */
 107 void CommonClean(vout_display_t *vd)
 108 {
 109     vout_display_sys_t *sys = vd->sys;
 110
 111     if (sys->event) {
 112         CommonChangeThumbnailClip(vd, false);
 113         EventThreadStop(sys->event);
 114         EventThreadDestroy(sys->event);
 115     }
 116
 117     RestoreScreensaver(vd);
 118 }
 119
 120 void CommonManage(vout_display_t *vd)
 121 {
 122     vout_display_sys_t *sys = vd->sys;
 123
 124     /* We used to call the Win32 PeekMessage function here to read the window
 125      * messages. But since window can stay blocked into this function for a
 126      * long time (for example when you move your window on the screen), I
 127      * decided to isolate PeekMessage in another thread. */
 128
 129     /* If we do not control our window, we check for geometry changes
 130      * ourselves because the parent might not send us its events. */
 131     if (sys->hparent) {
 132         RECT rect_parent;
 133         POINT point;
 134
 135         /* Check if the parent window has resized or moved */
 136         GetClientRect(sys->hparent, &rect_parent);
 137         point.x = point.y = 0;
 138         ClientToScreen(sys->hparent, &point);
 139         OffsetRect(&rect_parent, point.x, point.y);
 140
 141         if (!EqualRect(&rect_parent, &sys->rect_parent)) {
 142             sys->rect_parent = rect_parent;
 143
 144             /* This code deals with both resize and move
 145              *
 146              * For most drivers(direct3d, gdi, opengl), move is never
 147              * an issue. The surface automatically gets moved together
 148              * with the associated window (hvideownd)
 149              *
 150              * For directx, it is still important to call UpdateRects
 151              * on a move of the parent window, even if no resize occurred
 152              */
 153             SetWindowPos(sys->hwnd, 0, 0, 0,
 154                          rect_parent.right - rect_parent.left,
 155                          rect_parent.bottom - rect_parent.top,
 156                          SWP_NOZORDER);
 157
 158             UpdateRects(vd, NULL, NULL, true);
 159         }
 160     }
 161
 162     /* HasMoved means here resize or move */
 163     if (EventThreadGetAndResetHasMoved(sys->event))
 164         UpdateRects(vd, NULL, NULL, false);
 165 }
 166
 167 /**
 168  * It ensures that the video window is shown after the first picture
 169  * is displayed.
 170  */
 171 void CommonDisplay(vout_display_t *vd)
 172 {
 173     vout_display_sys_t *sys = vd->sys;
 174
 175     if (!sys->is_first_display)
 176         return;
 177
 178     /* Video window is initially hidden, show it now since we got a
 179      * picture to show.
 180      */
 181     SetWindowPos(sys->hvideownd, 0, 0, 0, 0, 0,
 182                  SWP_ASYNCWINDOWPOS|
 183                  SWP_FRAMECHANGED|
 184                  SWP_SHOWWINDOW|
 185                  SWP_NOMOVE|
 186                  SWP_NOSIZE|
 187                  SWP_NOZORDER);
 188     sys->is_first_display = false;
 189 }
 190
 191 /**
 192  * It updates a picture data/pitches.
 193  */
 194 int CommonUpdatePicture(picture_t *picture, picture_t **fallback,
 195                         uint8_t *data, unsigned pitch)
 196 {
 197     if (fallback) {
 198         if (*fallback == NULL) {
 199             *fallback = picture_NewFromFormat(&picture->format);
 200             if (*fallback == NULL)
 201                 return VLC_EGENERIC;
 202         }
 203         for (int n = 0; n < picture->i_planes; n++) {
 204             const plane_t *src = &(*fallback)->p[n];
 205             plane_t       *dst = &picture->p[n];
 206             dst->p_pixels = src->p_pixels;
 207             dst->i_pitch  = src->i_pitch;
 208             dst->i_lines  = src->i_lines;
 209         }
 210         return VLC_SUCCESS;
 211     }
 212     /* fill in buffer info in first plane */
 213     picture->p->p_pixels = data;
 214     picture->p->i_pitch  = pitch;
 215     picture->p->i_lines  = picture->format.i_visible_height;
 216
 217     /*  Fill chroma planes for planar YUV */
 218     if (picture->format.i_chroma == VLC_CODEC_I420 ||
 219         picture->format.i_chroma == VLC_CODEC_J420 ||
 220         picture->format.i_chroma == VLC_CODEC_YV12) {
 221
 222         for (int n = 1; n < picture->i_planes; n++) {
 223             const plane_t *o = &picture->p[n-1];
 224             plane_t *p = &picture->p[n];
 225
 226             p->p_pixels = o->p_pixels + o->i_lines * o->i_pitch;
 227             p->i_pitch  = pitch / 2;
 228             p->i_lines  = picture->format.i_visible_height / 2;
 229         }
 230         /* The dx/d3d buffer is always allocated as YV12 */
 231         if (vlc_fourcc_AreUVPlanesSwapped(picture->format.i_chroma, VLC_CODEC_YV12)) {
 232             uint8_t *p_tmp = picture->p[1].p_pixels;
 233             picture->p[1].p_pixels = picture->p[2].p_pixels;
 234             picture->p[2].p_pixels = p_tmp;
 235         }
 236     }
 237     return VLC_SUCCESS;
 238 }
 239
 240 void AlignRect(RECT *r, int align_boundary, int align_size)
 241 {
 242     if (align_boundary)
 243         r->left = (r->left + align_boundary/2) & ~align_boundary;
 244     if (align_size)
 245         r->right = ((r->right - r->left + align_size/2) & ~align_size) + r->left;
 246 }
 247
 248 /* */
 249 static void CommonChangeThumbnailClip(vout_display_t *vd, bool show)
 250 {
 251     vout_display_sys_t *sys = vd->sys;
 252
 253     /* Windows 7 taskbar thumbnail code */
 254     OSVERSIONINFO winVer;
 255     winVer.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
 256     if (!GetVersionEx(&winVer) || winVer.dwMajorVersion <= 5)
 257         return;
 258
 259     CoInitializeEx(NULL, COINIT_APARTMENTTHREADED);
 260
 261     void *ptr;
 262     if (S_OK == CoCreateInstance(&CLSID_TaskbarList,
 263                                  NULL, CLSCTX_INPROC_SERVER,
 264                                  &IID_ITaskbarList3,
 265                                  &ptr)) {
 266         ITaskbarList3 *taskbl = ptr;
 267         taskbl->lpVtbl->HrInit(taskbl);
 268
 269         HWND hroot = GetAncestor(sys->hwnd,GA_ROOT);
 270         RECT relative;
 271         if (show) {
 272             RECT video, parent;
 273             GetWindowRect(sys->hvideownd, &video);
 274             GetWindowRect(hroot, &parent);
 275             relative.left   = video.left   - parent.left - 8;
 276             relative.top    = video.top    - parent.top - 10;
 277
 278             relative.right  = video.right  - video.left + relative.left;
 279             relative.bottom = video.bottom - video.top  + relative.top - 25;
 280         }
 281         if (S_OK != taskbl->lpVtbl->SetThumbnailClip(taskbl, hroot,
 282                                                  show ? &relative : NULL))
 283             msg_Err(vd, "SetThumbNailClip failed");
 284
 285         taskbl->lpVtbl->Release(taskbl);
 286     }
 287     CoUninitialize();
 288 }
 289
 290 /*****************************************************************************
 291  * UpdateRects: update clipping rectangles
 292  *****************************************************************************
 293  * This function is called when the window position or size are changed, and
 294  * its job is to update the source and destination RECTs used to display the
 295  * picture.
 296  *****************************************************************************/
 297 void UpdateRects(vout_display_t *vd,
 298                   const vout_display_cfg_t *cfg,
 299                   const video_format_t *source,
 300                   bool is_forced)
 301 {
 302     vout_display_sys_t *sys = vd->sys;
 303 #define rect_src sys->rect_src
 304 #define rect_src_clipped sys->rect_src_clipped
 305 #define rect_dest sys->rect_dest
 306 #define rect_dest_clipped sys->rect_dest_clipped
 307
 308     RECT  rect;
 309     POINT point;
 310
 311     /* */
 312     if (!cfg)
 313         cfg = vd->cfg;
 314     if (!source)
 315         source = &vd->source;
 316
 317     /* Retrieve the window size */
 318     GetClientRect(sys->hwnd, &rect);
 319
 320     /* Retrieve the window position */
 321     point.x = point.y = 0;
 322     ClientToScreen(sys->hwnd, &point);
 323
 324     /* If nothing changed, we can return */
 325     bool has_moved;
 326     bool is_resized;
 327     EventThreadUpdateWindowPosition(sys->event, &has_moved, &is_resized,
 328                                     point.x, point.y,
 329                                     rect.right, rect.bottom);
 330     if (is_resized)
 331         vout_display_SendEventDisplaySize(vd, rect.right, rect.bottom, cfg->is_fullscreen);
 332     if (!is_forced && !has_moved && !is_resized )
 333         return;
 334
 335     /* Update the window position and size */
 336     vout_display_cfg_t place_cfg = *cfg;
 337     place_cfg.display.width  = rect.right;
 338     place_cfg.display.height = rect.bottom;
 339
 340     vout_display_place_t place;
 341     vout_display_PlacePicture(&place, source, &place_cfg, false);
 342
 343     EventThreadUpdateSourceAndPlace(sys->event, source, &place);
 344
 345     if (sys->hvideownd)
 346         SetWindowPos(sys->hvideownd, 0,
 347                      place.x, place.y, place.width, place.height,
 348                      SWP_NOCOPYBITS|SWP_NOZORDER|SWP_ASYNCWINDOWPOS);
 349
 350     /* Destination image position and dimensions */
 351 #if defined(MODULE_NAME_IS_direct3d) || defined(MODULE_NAME_IS_direct2d)
 352     rect_dest.left   = 0;
 353     rect_dest.right  = place.width;
 354     rect_dest.top    = 0;
 355     rect_dest.bottom = place.height;
 356 #else
 357     rect_dest.left = point.x + place.x;
 358     rect_dest.right = rect_dest.left + place.width;
 359     rect_dest.top = point.y + place.y;
 360     rect_dest.bottom = rect_dest.top + place.height;
 361
 362 #ifdef MODULE_NAME_IS_directdraw
 363     /* Apply overlay hardware constraints */
 364     if (sys->use_overlay)
 365         AlignRect(&rect_dest, sys->i_align_dest_boundary, sys->i_align_dest_size);
 366 #endif
 367
 368 #endif
 369
 370 #if defined(MODULE_NAME_IS_directdraw)
 371     /* UpdateOverlay directdraw function doesn't automatically clip to the
 372      * display size so we need to do it otherwise it will fail */
 373
 374     /* Clip the destination window */
 375     if (!IntersectRect(&rect_dest_clipped, &rect_dest,
 376                        &sys->rect_display)) {
 377         SetRectEmpty(&rect_src_clipped);
 378         goto exit;
 379     }
 380
 381 #ifndef NDEBUG
 382     msg_Dbg(vd, "DirectXUpdateRects image_dst_clipped coords:"
 383                 " %li,%li,%li,%li",
 384                 rect_dest_clipped.left, rect_dest_clipped.top,
 385                 rect_dest_clipped.right, rect_dest_clipped.bottom);
 386 #endif
 387
 388 #else
 389
 390     /* AFAIK, there are no clipping constraints in Direct3D, OpenGL and GDI */
 391     rect_dest_clipped = rect_dest;
 392
 393 #endif
 394
 395     /* the 2 following lines are to fix a bug when clicking on the desktop */
 396     if ((rect_dest_clipped.right - rect_dest_clipped.left) == 0 ||
 397         (rect_dest_clipped.bottom - rect_dest_clipped.top) == 0) {
 398         SetRectEmpty(&rect_src_clipped);
 399         goto exit;
 400     }
 401
 402     /* src image dimensions */
 403     rect_src.left   = 0;
 404     rect_src.top    = 0;
 405     rect_src.right  = vd->fmt.i_visible_width;
 406     rect_src.bottom = vd->fmt.i_visible_height;
 407
 408     /* Clip the source image */
 409     rect_src_clipped.left = source->i_x_offset +
 410       (rect_dest_clipped.left - rect_dest.left) *
 411       source->i_visible_width / (rect_dest.right - rect_dest.left);
 412     rect_src_clipped.right = source->i_x_offset +
 413       source->i_visible_width -
 414       (rect_dest.right - rect_dest_clipped.right) *
 415       source->i_visible_width / (rect_dest.right - rect_dest.left);
 416     rect_src_clipped.top = source->i_y_offset +
 417       (rect_dest_clipped.top - rect_dest.top) *
 418       source->i_visible_height / (rect_dest.bottom - rect_dest.top);
 419     rect_src_clipped.bottom = source->i_y_offset +
 420       source->i_visible_height -
 421       (rect_dest.bottom - rect_dest_clipped.bottom) *
 422       source->i_visible_height / (rect_dest.bottom - rect_dest.top);
 423
 424 #ifdef MODULE_NAME_IS_directdraw
 425     /* Apply overlay hardware constraints */
 426     if (sys->use_overlay)
 427         AlignRect(&rect_src_clipped, sys->i_align_src_boundary, sys->i_align_src_size);
 428 #elif defined(MODULE_NAME_IS_direct3d) || defined(MODULE_NAME_IS_direct2d)
 429     /* Needed at least with YUV content */
 430     rect_src_clipped.left &= ~1;
 431     rect_src_clipped.right &= ~1;
 432     rect_src_clipped.top &= ~1;
 433     rect_src_clipped.bottom &= ~1;
 434 #endif
 435
 436 #ifndef NDEBUG
 437     msg_Dbg(vd, "DirectXUpdateRects image_src_clipped"
 438                 " coords: %li,%li,%li,%li",
 439                 rect_src_clipped.left, rect_src_clipped.top,
 440                 rect_src_clipped.right, rect_src_clipped.bottom);
 441 #endif
 442
 443 #ifdef MODULE_NAME_IS_directdraw
 444     /* The destination coordinates need to be relative to the current
 445      * directdraw primary surface (display) */
 446     rect_dest_clipped.left -= sys->rect_display.left;
 447     rect_dest_clipped.right -= sys->rect_display.left;
 448     rect_dest_clipped.top -= sys->rect_display.top;
 449     rect_dest_clipped.bottom -= sys->rect_display.top;
 450 #endif
 451
 452     CommonChangeThumbnailClip(vd, true);
 453
 454 exit:
 455     /* Signal the change in size/position */
 456     sys->changes |= DX_POSITION_CHANGE;
 457
 458 #undef rect_src
 459 #undef rect_src_clipped
 460 #undef rect_dest
 461 #undef rect_dest_clipped
 462 }
 463
 464 static int CommonControlSetFullscreen(vout_display_t *vd, bool is_fullscreen)
 465 {
 466     vout_display_sys_t *sys = vd->sys;
 467
 468 #ifdef MODULE_NAME_IS_direct3d
 469     if (sys->use_desktop && is_fullscreen)
 470         return VLC_EGENERIC;
 471 #endif
 472
 473     /* */
 474     if (sys->parent_window)
 475         return vout_window_SetFullScreen(sys->parent_window, is_fullscreen);
 476
 477     /* */
 478     HWND hwnd = sys->hparent && sys->hfswnd ? sys->hfswnd : sys->hwnd;
 479
 480     /* Save the current windows placement/placement to restore
 481        when fullscreen is over */
 482     WINDOWPLACEMENT window_placement;
 483     window_placement.length = sizeof(WINDOWPLACEMENT);
 484     GetWindowPlacement(hwnd, &window_placement);
 485
 486     if (is_fullscreen) {
 487         msg_Dbg(vd, "entering fullscreen mode");
 488
 489         /* Change window style, no borders and no title bar */
 490         SetWindowLong(hwnd, GWL_STYLE, WS_CLIPCHILDREN | WS_VISIBLE);
 491
 492         if (sys->hparent) {
 493             /* Retrieve current window position so fullscreen will happen
 494             *on the right screen */
 495             HMONITOR hmon = MonitorFromWindow(sys->hparent,
 496                                               MONITOR_DEFAULTTONEAREST);
 497             MONITORINFO mi;
 498             mi.cbSize = sizeof(MONITORINFO);
 499             if (GetMonitorInfo(hmon, &mi))
 500                 SetWindowPos(hwnd, 0,
 501                              mi.rcMonitor.left,
 502                              mi.rcMonitor.top,
 503                              mi.rcMonitor.right - mi.rcMonitor.left,
 504                              mi.rcMonitor.bottom - mi.rcMonitor.top,
 505                              SWP_NOZORDER|SWP_FRAMECHANGED);
 506         } else {
 507             /* Maximize non embedded window */
 508             ShowWindow(hwnd, SW_SHOWMAXIMIZED);
 509         }
 510
 511         if (sys->hparent) {
 512             /* Hide the previous window */
 513             RECT rect;
 514             GetClientRect(hwnd, &rect);
 515             SetParent(sys->hwnd, hwnd);
 516             SetWindowPos(sys->hwnd, 0, 0, 0,
 517                          rect.right, rect.bottom,
 518                          SWP_NOZORDER|SWP_FRAMECHANGED);
 519
 520             HWND topLevelParent = GetAncestor(sys->hparent, GA_ROOT);
 521             ShowWindow(topLevelParent, SW_HIDE);
 522         }
 523         SetForegroundWindow(hwnd);
 524     } else {
 525         msg_Dbg(vd, "leaving fullscreen mode");
 526
 527         /* Change window style, no borders and no title bar */
 528         SetWindowLong(hwnd, GWL_STYLE, EventThreadGetWindowStyle(sys->event));
 529
 530         if (sys->hparent) {
 531             RECT rect;
 532             GetClientRect(sys->hparent, &rect);
 533             SetParent(sys->hwnd, sys->hparent);
 534             SetWindowPos(sys->hwnd, 0, 0, 0,
 535                          rect.right, rect.bottom,
 536                          SWP_NOZORDER|SWP_FRAMECHANGED);
 537
 538             HWND topLevelParent = GetAncestor(sys->hparent, GA_ROOT);
 539             ShowWindow(topLevelParent, SW_SHOW);
 540             SetForegroundWindow(sys->hparent);
 541             ShowWindow(hwnd, SW_HIDE);
 542         } else {
 543             /* return to normal window for non embedded vout */
 544             SetWindowPlacement(hwnd, &window_placement);
 545             ShowWindow(hwnd, SW_SHOWNORMAL);
 546         }
 547     }
 548     return VLC_SUCCESS;
 549 }
 550
 551 int CommonControl(vout_display_t *vd, int query, va_list args)
 552 {
 553     vout_display_sys_t *sys = vd->sys;
 554
 555     switch (query) {
 556     case VOUT_DISPLAY_CHANGE_DISPLAY_SIZE:   /* const vout_display_cfg_t *p_cfg, int is_forced */
 557     case VOUT_DISPLAY_CHANGE_DISPLAY_FILLED: /* const vout_display_cfg_t *p_cfg */
 558     case VOUT_DISPLAY_CHANGE_ZOOM:           /* const vout_display_cfg_t *p_cfg */
 559     case VOUT_DISPLAY_CHANGE_SOURCE_ASPECT:  /* const video_format_t *p_source */
 560     case VOUT_DISPLAY_CHANGE_SOURCE_CROP: {  /* const video_format_t *p_source */
 561         const vout_display_cfg_t *cfg;
 562         const video_format_t *source;
 563         bool  is_forced = true;
 564         if (query == VOUT_DISPLAY_CHANGE_SOURCE_CROP ||
 565             query == VOUT_DISPLAY_CHANGE_SOURCE_ASPECT) {
 566             cfg    = vd->cfg;
 567             source = va_arg(args, const video_format_t *);
 568         } else {
 569             cfg    = va_arg(args, const vout_display_cfg_t *);
 570             source = &vd->source;
 571             if (query == VOUT_DISPLAY_CHANGE_DISPLAY_SIZE)
 572                 is_forced = va_arg(args, int);
 573         }
 574         if (query == VOUT_DISPLAY_CHANGE_DISPLAY_SIZE && is_forced) {
 575             /* Update dimensions */
 576             if (sys->parent_window) {
 577                 vout_window_SetSize(sys->parent_window, cfg->display.width, cfg->display.height);
 578             } else {
 579                 RECT rect_window;
 580                 rect_window.top    = 0;
 581                 rect_window.left   = 0;
 582                 rect_window.right  = cfg->display.width;
 583                 rect_window.bottom = cfg->display.height;
 584                 AdjustWindowRect(&rect_window, EventThreadGetWindowStyle(sys->event), 0);
 585
 586                 SetWindowPos(sys->hwnd, 0, 0, 0,
 587                              rect_window.right - rect_window.left,
 588                              rect_window.bottom - rect_window.top, SWP_NOMOVE);
 589             }
 590             return VLC_EGENERIC;
 591         }
 592         UpdateRects(vd, cfg, source, is_forced);
 593         return VLC_SUCCESS;
 594     }
 595     case VOUT_DISPLAY_CHANGE_WINDOW_STATE: {       /* unsigned state */
 596         const unsigned state = va_arg(args, unsigned);
 597         const bool is_on_top = (state & VOUT_WINDOW_STATE_ABOVE) != 0;
 598 #ifdef MODULE_NAME_IS_direct3d
 599         if (sys->use_desktop && is_on_top)
 600             return VLC_EGENERIC;
 601 #endif
 602         if (sys->parent_window) {
 603             if (vout_window_SetState(sys->parent_window, state))
 604                 return VLC_EGENERIC;
 605         } else {
 606             HMENU hMenu = GetSystemMenu(sys->hwnd, FALSE);
 607
 608             if (is_on_top && !(GetWindowLong(sys->hwnd, GWL_EXSTYLE) & WS_EX_TOPMOST)) {
 609                 CheckMenuItem(hMenu, IDM_TOGGLE_ON_TOP, MF_BYCOMMAND | MFS_CHECKED);
 610                 SetWindowPos(sys->hwnd, HWND_TOPMOST, 0, 0, 0, 0, SWP_NOSIZE | SWP_NOMOVE);
 611             } else if (!is_on_top && (GetWindowLong(sys->hwnd, GWL_EXSTYLE) & WS_EX_TOPMOST)) {
 612                 CheckMenuItem(hMenu, IDM_TOGGLE_ON_TOP, MF_BYCOMMAND | MFS_UNCHECKED);
 613                 SetWindowPos(sys->hwnd, HWND_NOTOPMOST, 0, 0, 0, 0, SWP_NOSIZE|SWP_NOMOVE);
 614             }
 615         }
 616         sys->is_on_top = is_on_top;
 617         return VLC_SUCCESS;
 618     }
 619     case VOUT_DISPLAY_CHANGE_FULLSCREEN: {   /* const vout_display_cfg_t *p_cfg */
 620         const vout_display_cfg_t *cfg = va_arg(args, const vout_display_cfg_t *);
 621         if (CommonControlSetFullscreen(vd, cfg->is_fullscreen))
 622             return VLC_EGENERIC;
 623         UpdateRects(vd, NULL, NULL, false);
 624         return VLC_SUCCESS;
 625     }
 626
 627     case VOUT_DISPLAY_HIDE_MOUSE:
 628         EventThreadMouseHide(sys->event);
 629         return VLC_SUCCESS;
 630     case VOUT_DISPLAY_RESET_PICTURES:
 631         assert(0);
 632     default:
 633         return VLC_EGENERIC;
 634     }
 635 }
 636
 637 static void DisableScreensaver(vout_display_t *vd)
 638 {
 639     vout_display_sys_t *sys = vd->sys;
 640
 641     /* disable screensaver by temporarily changing system settings */
 642     sys->i_spi_screensaveactive = 0;
 643     if (var_GetBool(vd, "disable-screensaver")) {
 644         msg_Dbg(vd, "disabling screen saver");
 645         SystemParametersInfo(SPI_GETSCREENSAVEACTIVE, 0,
 646                              &sys->i_spi_screensaveactive, 0);
 647
 648         if (LOWORD(GetVersion()) == 0x0005) {
 649             /* If this is NT 5.0 (i.e., Win2K), we need to hack around
 650              * KB318781 (see http://support.microsoft.com/kb/318781) */
 651
 652             HKEY hKeyCP = NULL;
 653
 654             if (ERROR_SUCCESS == RegOpenKeyEx(HKEY_CURRENT_USER,
 655                                               TEXT("Control Panel\\Desktop"),
 656                                               0, KEY_QUERY_VALUE, &hKeyCP) &&
 657                 ERROR_SUCCESS != RegQueryValueEx(hKeyCP, TEXT("SCRNSAVE.EXE"),
 658                                                  NULL, NULL, NULL, NULL)) {
 659                 sys->i_spi_screensaveactive = FALSE;
 660             }
 661         }
 662
 663         if (FALSE != sys->i_spi_screensaveactive) {
 664             SystemParametersInfo(SPI_SETSCREENSAVEACTIVE, 0, NULL, 0);
 665         }
 666     }
 667 }
 668
 669 static void RestoreScreensaver(vout_display_t *vd)
 670 {
 671     vout_display_sys_t *sys = vd->sys;
 672
 673     /* restore screensaver system settings */
 674     if (0 != sys->i_spi_screensaveactive) {
 675         SystemParametersInfo(SPI_SETSCREENSAVEACTIVE,
 676                              sys->i_spi_screensaveactive, NULL, 0);
 677     }
 678 }