libvo/w32_common.c

   1 /*
   2  * This file is part of MPlayer.
   3  *
   4  * MPlayer is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * MPlayer is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along
  15  * with MPlayer; if not, write to the Free Software Foundation, Inc.,
  16  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  17  */
  18
  19 #include <stdio.h>
  20 #include <limits.h>
  21 #include <windows.h>
  22 #include <windowsx.h>
  23
  24 // To get "#define vo_ontop global_vo->opts->vo_ontop" etc
  25 #include "old_vo_defines.h"
  26 #include "input/keycodes.h"
  27 #include "input/input.h"
  28 #include "mp_msg.h"
  29 #include "video_out.h"
  30 #include "aspect.h"
  31 #include "w32_common.h"
  32 #include "mp_fifo.h"
  33
  34 #ifndef MONITOR_DEFAULTTOPRIMARY
  35 #define MONITOR_DEFAULTTOPRIMARY 1
  36 #endif
  37
  38 static const char classname[] = "MPlayer - The Movie Player";
  39 int vo_vm = 0;
  40
  41 static int depthonscreen;
  42 // last non-fullscreen extends
  43 static int prev_width;
  44 static int prev_height;
  45 static int prev_x;
  46 static int prev_y;
  47
  48 static uint32_t o_dwidth;
  49 static uint32_t o_dheight;
  50
  51 static HINSTANCE hInstance;
  52 #define vo_window vo_w32_window
  53 HWND vo_window = 0;
  54 /** HDC used when rendering to a device instead of window */
  55 static HDC dev_hdc;
  56 static int event_flags;
  57 static int mon_cnt;
  58
  59 static HMONITOR (WINAPI* myMonitorFromWindow)(HWND, DWORD);
  60 static BOOL (WINAPI* myGetMonitorInfo)(HMONITOR, LPMONITORINFO);
  61 static BOOL (WINAPI* myEnumDisplayMonitors)(HDC, LPCRECT, MONITORENUMPROC, LPARAM);
  62
  63 static const struct mp_keymap vk_map[] = {
  64     // special keys
  65     {VK_ESCAPE, KEY_ESC}, {VK_BACK, KEY_BS}, {VK_TAB, KEY_TAB}, {VK_CONTROL, KEY_CTRL},
  66
  67     // cursor keys
  68     {VK_LEFT, KEY_LEFT}, {VK_UP, KEY_UP}, {VK_RIGHT, KEY_RIGHT}, {VK_DOWN, KEY_DOWN},
  69
  70     // navigation block
  71     {VK_INSERT, KEY_INSERT}, {VK_DELETE, KEY_DELETE}, {VK_HOME, KEY_HOME}, {VK_END, KEY_END},
  72     {VK_PRIOR, KEY_PAGE_UP}, {VK_NEXT, KEY_PAGE_DOWN},
  73
  74     // F-keys
  75     {VK_F1, KEY_F+1}, {VK_F2, KEY_F+2}, {VK_F3, KEY_F+3}, {VK_F4, KEY_F+4},
  76     {VK_F5, KEY_F+5}, {VK_F6, KEY_F+6}, {VK_F7, KEY_F+7}, {VK_F8, KEY_F+8},
  77     {VK_F9, KEY_F+9}, {VK_F10, KEY_F+10}, {VK_F11, KEY_F+11}, {VK_F1, KEY_F+12},
  78     // numpad
  79     {VK_NUMPAD0, KEY_KP0}, {VK_NUMPAD1, KEY_KP1}, {VK_NUMPAD2, KEY_KP2},
  80     {VK_NUMPAD3, KEY_KP3}, {VK_NUMPAD4, KEY_KP4}, {VK_NUMPAD5, KEY_KP5},
  81     {VK_NUMPAD6, KEY_KP6}, {VK_NUMPAD7, KEY_KP7}, {VK_NUMPAD8, KEY_KP8},
  82     {VK_NUMPAD9, KEY_KP9}, {VK_DECIMAL, KEY_KPDEC},
  83
  84     {0, 0}
  85 };
  86
  87 static LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam) {
  88     RECT r;
  89     POINT p;
  90     int mpkey;
  91     switch (message) {
  92         case WM_ERASEBKGND: // no need to erase background seperately
  93             return 1;
  94         case WM_PAINT:
  95             event_flags |= VO_EVENT_EXPOSE;
  96             break;
  97         case WM_MOVE:
  98             p.x = 0;
  99             p.y = 0;
 100             ClientToScreen(vo_window, &p);
 101             vo_dx = p.x;
 102             vo_dy = p.y;
 103             break;
 104         case WM_SIZE:
 105             event_flags |= VO_EVENT_RESIZE;
 106             GetClientRect(vo_window, &r);
 107             vo_dwidth = r.right;
 108             vo_dheight = r.bottom;
 109             break;
 110         case WM_WINDOWPOSCHANGING:
 111             if (vo_keepaspect && !vo_fs && WinID < 0) {
 112                 WINDOWPOS *wpos = lParam;
 113                 int xborder, yborder;
 114                 r.left = r.top = 0;
 115                 r.right = wpos->cx;
 116                 r.bottom = wpos->cy;
 117                 AdjustWindowRect(&r, GetWindowLong(vo_window, GWL_STYLE), 0);
 118                 xborder = (r.right - r.left) - wpos->cx;
 119                 yborder = (r.bottom - r.top) - wpos->cy;
 120                 wpos->cx -= xborder; wpos->cy -= yborder;
 121                 aspect_fit(global_vo, &wpos->cx, &wpos->cy, wpos->cx, wpos->cy);
 122                 wpos->cx += xborder; wpos->cy += yborder;
 123             }
 124             return 0;
 125         case WM_CLOSE:
 126             mplayer_put_key(KEY_CLOSE_WIN);
 127             break;
 128         case WM_SYSCOMMAND:
 129             switch (wParam) {
 130                 case SC_SCREENSAVE:
 131                 case SC_MONITORPOWER:
 132                     mp_msg(MSGT_VO, MSGL_V, "vo: win32: killing screensaver\n");
 133                     return 0;
 134             }
 135             break;
 136         case WM_KEYDOWN:
 137             mpkey = lookup_keymap_table(vk_map, wParam);
 138             if (mpkey)
 139                 mplayer_put_key(mpkey);
 140             break;
 141         case WM_CHAR:
 142             mplayer_put_key(wParam);
 143             break;
 144         case WM_LBUTTONDOWN:
 145             if (!vo_nomouse_input && (vo_fs || (wParam & MK_CONTROL))) {
 146                 mplayer_put_key(MOUSE_BTN0);
 147                 break;
 148             }
 149             if (!vo_fs) {
 150                 ReleaseCapture();
 151                 SendMessage(hWnd, WM_NCLBUTTONDOWN, HTCAPTION, 0);
 152                 return 0;
 153             }
 154             break;
 155         case WM_MBUTTONDOWN:
 156             if (!vo_nomouse_input)
 157                 mplayer_put_key(MOUSE_BTN1);
 158             break;
 159         case WM_RBUTTONDOWN:
 160             if (!vo_nomouse_input)
 161                 mplayer_put_key(MOUSE_BTN2);
 162             break;
 163         case WM_MOUSEMOVE:
 164             vo_mouse_movement(global_vo, GET_X_LPARAM(lParam), GET_Y_LPARAM(lParam));
 165             break;
 166         case WM_MOUSEWHEEL:
 167             if (!vo_nomouse_input) {
 168                 int x = GET_WHEEL_DELTA_WPARAM(wParam);
 169                 if (x > 0)
 170                     mplayer_put_key(MOUSE_BTN3);
 171                 else
 172                     mplayer_put_key(MOUSE_BTN4);
 173                 break;
 174             }
 175     }
 176
 177     return DefWindowProc(hWnd, message, wParam, lParam);
 178 }
 179
 180 /**
 181  * \brief Dispatch incoming window events and handle them.
 182  *
 183  * This function should be placed inside libvo's function "check_events".
 184  *
 185  * Global libvo variables changed:
 186  * vo_dwidth:  new window client area width
 187  * vo_dheight: new window client area height
 188  *
 189  * \return int with these flags possibly set, take care to handle in the right order
 190  *         if it matters in your driver:
 191  *
 192  * VO_EVENT_RESIZE = The window was resized. If necessary reinit your
 193  *                   driver render context accordingly.
 194  * VO_EVENT_EXPOSE = The window was exposed. Call e.g. flip_frame() to redraw
 195  *                   the window if the movie is paused.
 196  */
 197 int vo_w32_check_events(void) {
 198     MSG msg;
 199     event_flags = 0;
 200     while (PeekMessage(&msg, 0, 0, 0, PM_REMOVE)) {
 201         TranslateMessage(&msg);
 202         DispatchMessage(&msg);
 203     }
 204     if (WinID >= 0) {
 205         BOOL res;
 206         RECT r;
 207         res = GetClientRect(vo_window, &r);
 208         if (res && (r.right != vo_dwidth || r.bottom != vo_dheight)) {
 209             vo_dwidth = r.right; vo_dheight = r.bottom;
 210             event_flags |= VO_EVENT_RESIZE;
 211         }
 212         res = GetClientRect(WinID, &r);
 213         if (res && (r.right != vo_dwidth || r.bottom != vo_dheight))
 214             MoveWindow(vo_window, 0, 0, r.right, r.bottom, FALSE);
 215         if (!IsWindow(WinID))
 216             // Window has probably been closed, e.g. due to program crash
 217             mplayer_put_key(KEY_CLOSE_WIN);
 218     }
 219
 220     return event_flags;
 221 }
 222
 223 static BOOL CALLBACK mon_enum(HMONITOR hmon, HDC hdc, LPRECT r, LPARAM p) {
 224     // this defaults to the last screen if specified number does not exist
 225     xinerama_x = r->left;
 226     xinerama_y = r->top;
 227     vo_screenwidth = r->right - r->left;
 228     vo_screenheight = r->bottom - r->top;
 229     if (mon_cnt == xinerama_screen)
 230         return FALSE;
 231     mon_cnt++;
 232     return TRUE;
 233 }
 234
 235 /**
 236  * \brief Update screen information.
 237  *
 238  * This function should be called in libvo's "control" callback
 239  * with parameter VOCTRL_UPDATE_SCREENINFO.
 240  * Note that this also enables the new API where geometry and aspect
 241  * calculations are done in video_out.c:config_video_out
 242  *
 243  * Global libvo variables changed:
 244  * xinerama_x
 245  * xinerama_y
 246  * vo_screenwidth
 247  * vo_screenheight
 248  */
 249 void w32_update_xinerama_info(void) {
 250     xinerama_x = xinerama_y = 0;
 251     if (xinerama_screen < -1) {
 252         int tmp;
 253         xinerama_x = GetSystemMetrics(SM_XVIRTUALSCREEN);
 254         xinerama_y = GetSystemMetrics(SM_YVIRTUALSCREEN);
 255         tmp = GetSystemMetrics(SM_CXVIRTUALSCREEN);
 256         if (tmp) vo_screenwidth = tmp;
 257         tmp = GetSystemMetrics(SM_CYVIRTUALSCREEN);
 258         if (tmp) vo_screenheight = tmp;
 259     } else if (xinerama_screen == -1 && myMonitorFromWindow && myGetMonitorInfo) {
 260         MONITORINFO mi;
 261         HMONITOR m = myMonitorFromWindow(vo_window, MONITOR_DEFAULTTOPRIMARY);
 262         mi.cbSize = sizeof(mi);
 263         myGetMonitorInfo(m, &mi);
 264         xinerama_x = mi.rcMonitor.left;
 265         xinerama_y = mi.rcMonitor.top;
 266         vo_screenwidth = mi.rcMonitor.right - mi.rcMonitor.left;
 267         vo_screenheight = mi.rcMonitor.bottom - mi.rcMonitor.top;
 268     } else if (xinerama_screen > 0 && myEnumDisplayMonitors) {
 269         mon_cnt = 0;
 270         myEnumDisplayMonitors(NULL, NULL, mon_enum, 0);
 271     }
 272     aspect_save_screenres(vo_screenwidth, vo_screenheight);
 273 }
 274
 275 static void updateScreenProperties(void) {
 276     DEVMODE dm;
 277     dm.dmSize = sizeof dm;
 278     dm.dmDriverExtra = 0;
 279     dm.dmFields = DM_BITSPERPEL | DM_PELSWIDTH | DM_PELSHEIGHT;
 280     if (!EnumDisplaySettings(0, ENUM_CURRENT_SETTINGS, &dm)) {
 281         mp_msg(MSGT_VO, MSGL_ERR, "vo: win32: unable to enumerate display settings!\n");
 282         return;
 283     }
 284
 285     vo_screenwidth = dm.dmPelsWidth;
 286     vo_screenheight = dm.dmPelsHeight;
 287     depthonscreen = dm.dmBitsPerPel;
 288     w32_update_xinerama_info();
 289 }
 290
 291 static void changeMode(void) {
 292     DEVMODE dm;
 293     dm.dmSize = sizeof dm;
 294     dm.dmDriverExtra = 0;
 295
 296     dm.dmFields = DM_BITSPERPEL | DM_PELSWIDTH | DM_PELSHEIGHT;
 297     dm.dmBitsPerPel = depthonscreen;
 298     dm.dmPelsWidth = vo_screenwidth;
 299     dm.dmPelsHeight = vo_screenheight;
 300
 301     if (vo_vm) {
 302         int bestMode = -1;
 303         int bestScore = INT_MAX;
 304         int i;
 305         for (i = 0; EnumDisplaySettings(0, i, &dm); ++i) {
 306             int score = (dm.dmPelsWidth - o_dwidth) * (dm.dmPelsHeight - o_dheight);
 307             if (dm.dmBitsPerPel != depthonscreen) continue;
 308             if (dm.dmPelsWidth < o_dwidth) continue;
 309             if (dm.dmPelsHeight < o_dheight) continue;
 310
 311             if (score < bestScore) {
 312                 bestScore = score;
 313                 bestMode = i;
 314             }
 315         }
 316
 317         if (bestMode != -1)
 318             EnumDisplaySettings(0, bestMode, &dm);
 319
 320         ChangeDisplaySettings(&dm, CDS_FULLSCREEN);
 321     }
 322 }
 323
 324 static void resetMode(void) {
 325     if (vo_vm)
 326     ChangeDisplaySettings(0, 0);
 327 }
 328
 329 static int createRenderingContext(void) {
 330     HWND layer = HWND_NOTOPMOST;
 331     RECT r;
 332     int style = (vo_border && !vo_fs) ?
 333                 (WS_OVERLAPPEDWINDOW | WS_SIZEBOX) : WS_POPUP;
 334
 335     if (WinID >= 0)
 336         return 1;
 337
 338     if (vo_fs || vo_ontop) layer = HWND_TOPMOST;
 339     if (vo_fs) {
 340         changeMode();
 341         while (ShowCursor(0) >= 0) /**/ ;
 342     } else {
 343         resetMode();
 344         while (ShowCursor(1) < 0) /**/ ;
 345     }
 346     updateScreenProperties();
 347     ShowWindow(vo_window, SW_HIDE);
 348     SetWindowLong(vo_window, GWL_STYLE, style);
 349     if (vo_fs) {
 350         prev_width = vo_dwidth;
 351         prev_height = vo_dheight;
 352         prev_x = vo_dx;
 353         prev_y = vo_dy;
 354         vo_dwidth = vo_screenwidth;
 355         vo_dheight = vo_screenheight;
 356         vo_dx = xinerama_x;
 357         vo_dy = xinerama_y;
 358     } else {
 359         // make sure there are no "stale" resize events
 360         // that would set vo_d* to wrong values
 361         vo_w32_check_events();
 362         vo_dwidth = prev_width;
 363         vo_dheight = prev_height;
 364         vo_dx = prev_x;
 365         vo_dy = prev_y;
 366         // HACK around what probably is a windows focus bug:
 367         // when pressing 'f' on the console, then 'f' again to
 368         // return to windowed mode, any input into the video
 369         // window is lost forever.
 370         SetFocus(vo_window);
 371     }
 372     r.left = vo_dx;
 373     r.right = r.left + vo_dwidth;
 374     r.top = vo_dy;
 375     r.bottom = r.top + vo_dheight;
 376     AdjustWindowRect(&r, style, 0);
 377     SetWindowPos(vo_window, layer, r.left, r.top, r.right - r.left, r.bottom - r.top, SWP_SHOWWINDOW);
 378     return 1;
 379 }
 380
 381 /**
 382  * \brief Configure and show window on the screen.
 383  *
 384  * This function should be called in libvo's "config" callback.
 385  * It configures a window and shows it on the screen.
 386  *
 387  * Global libvo variables changed:
 388  * vo_fs
 389  * vo_vm
 390  *
 391  * \return 1 - Success, 0 - Failure
 392  */
 393 int vo_w32_config(uint32_t width, uint32_t height, uint32_t flags) {
 394     PIXELFORMATDESCRIPTOR pfd;
 395     int pf;
 396     HDC vo_hdc = vo_w32_get_dc(vo_window);
 397
 398     memset(&pfd, 0, sizeof pfd);
 399     pfd.nSize = sizeof pfd;
 400     pfd.nVersion = 1;
 401     pfd.dwFlags = PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER;
 402     if (flags & VOFLAG_STEREO)
 403         pfd.dwFlags |= PFD_STEREO;
 404     pfd.iPixelType = PFD_TYPE_RGBA;
 405     pfd.cColorBits = 24;
 406     pfd.iLayerType = PFD_MAIN_PLANE;
 407     pf = ChoosePixelFormat(vo_hdc, &pfd);
 408     if (!pf) {
 409         mp_msg(MSGT_VO, MSGL_ERR, "vo: win32: unable to select a valid pixel format!\n");
 410         vo_w32_release_dc(vo_window, vo_hdc);
 411         return 0;
 412     }
 413
 414     SetPixelFormat(vo_hdc, pf, &pfd);
 415     vo_w32_release_dc(vo_window, vo_hdc);
 416
 417     // we already have a fully initialized window, so nothing needs to be done
 418     if (flags & VOFLAG_HIDDEN)
 419         return 1;
 420     // store original size for videomode switching
 421     o_dwidth = width;
 422     o_dheight = height;
 423
 424     if (WinID < 0) {
 425         // the desired size is ignored in wid mode, it always matches the window size.
 426         prev_width = vo_dwidth = width;
 427         prev_height = vo_dheight = height;
 428         prev_x = vo_dx;
 429         prev_y = vo_dy;
 430     }
 431
 432     vo_fs = flags & VOFLAG_FULLSCREEN;
 433     vo_vm = flags & VOFLAG_MODESWITCHING;
 434     return createRenderingContext();
 435 }
 436
 437 /**
 438  * \brief return the name of the selected device if it is indepedant
 439  * \return pointer to string, must be freed.
 440  */
 441 static char *get_display_name(void) {
 442     DISPLAY_DEVICE disp;
 443     disp.cb = sizeof(disp);
 444     EnumDisplayDevices(NULL, vo_adapter_num, &disp, 0);
 445     if (disp.StateFlags & DISPLAY_DEVICE_ATTACHED_TO_DESKTOP)
 446         return NULL;
 447     return strdup(disp.DeviceName);
 448 }
 449
 450 /**
 451  * \brief Initialize w32_common framework.
 452  *
 453  * The first function that should be called from the w32_common framework.
 454  * It handles window creation on the screen with proper title and attributes.
 455  * It also initializes the framework's internal variables. The function should
 456  * be called after your own preinit initialization and you shouldn't do any
 457  * window management on your own.
 458  *
 459  * Global libvo variables changed:
 460  * vo_w32_window
 461  * vo_screenwidth
 462  * vo_screenheight
 463  *
 464  * \return 1 = Success, 0 = Failure
 465  */
 466 int vo_w32_init(void) {
 467     HICON mplayerIcon = 0;
 468     char exedir[MAX_PATH];
 469     HINSTANCE user32;
 470     char *dev;
 471
 472     if (vo_window)
 473         return 1;
 474
 475     hInstance = GetModuleHandle(0);
 476
 477     if (GetModuleFileName(0, exedir, MAX_PATH))
 478         mplayerIcon = ExtractIcon(hInstance, exedir, 0);
 479     if (!mplayerIcon)
 480         mplayerIcon = LoadIcon(0, IDI_APPLICATION);
 481
 482   {
 483     WNDCLASSEX wcex = { sizeof wcex, CS_OWNDC | CS_DBLCLKS, WndProc, 0, 0, hInstance, mplayerIcon, LoadCursor(0, IDC_ARROW), NULL, 0, classname, mplayerIcon };
 484
 485     if (!RegisterClassEx(&wcex)) {
 486         mp_msg(MSGT_VO, MSGL_ERR, "vo: win32: unable to register window class!\n");
 487         return 0;
 488     }
 489   }
 490
 491     if (WinID >= 0)
 492     {
 493         RECT r;
 494         GetClientRect(WinID, &r);
 495         vo_dwidth = r.right; vo_dheight = r.bottom;
 496         vo_window = CreateWindowEx(WS_EX_NOPARENTNOTIFY, classname, classname,
 497                      WS_CHILD | WS_VISIBLE,
 498                      0, 0, vo_dwidth, vo_dheight, WinID, 0, hInstance, 0);
 499         EnableWindow(vo_window, 0);
 500     } else
 501         vo_window = CreateWindowEx(0, classname, classname,
 502                       vo_border ? (WS_OVERLAPPEDWINDOW | WS_SIZEBOX) : WS_POPUP,
 503                       CW_USEDEFAULT, 0, 100, 100, 0, 0, hInstance, 0);
 504     if (!vo_window) {
 505         mp_msg(MSGT_VO, MSGL_ERR, "vo: win32: unable to create window!\n");
 506         return 0;
 507     }
 508
 509     myMonitorFromWindow = NULL;
 510     myGetMonitorInfo = NULL;
 511     myEnumDisplayMonitors = NULL;
 512     user32 = GetModuleHandle("user32.dll");
 513     if (user32) {
 514         myMonitorFromWindow = (void *)GetProcAddress(user32, "MonitorFromWindow");
 515         myGetMonitorInfo = GetProcAddress(user32, "GetMonitorInfoA");
 516         myEnumDisplayMonitors = GetProcAddress(user32, "EnumDisplayMonitors");
 517     }
 518     dev_hdc = 0;
 519     dev = get_display_name();
 520     if (dev) dev_hdc = CreateDC(dev, NULL, NULL, NULL);
 521     free(dev);
 522     updateScreenProperties();
 523
 524     mp_msg(MSGT_VO, MSGL_V, "vo: win32: running at %dx%d with depth %d\n", vo_screenwidth, vo_screenheight, depthonscreen);
 525
 526     return 1;
 527 }
 528
 529 /**
 530  * \brief Toogle fullscreen / windowed mode.
 531  *
 532  * Should be called on VOCTRL_FULLSCREEN event. The window is
 533  * always resized after this call, so the rendering context
 534  * should be reinitialized with the new dimensions.
 535  * It is unspecified if vo_check_events will create a resize
 536  * event in addition or not.
 537  *
 538  * Global libvo variables changed:
 539  * vo_dwidth
 540  * vo_dheight
 541  * vo_fs
 542  */
 543
 544 void vo_w32_fullscreen(void) {
 545     vo_fs = !vo_fs;
 546
 547     createRenderingContext();
 548 }
 549
 550 /**
 551  * \brief Toogle window border attribute.
 552  *
 553  * Should be called on VOCTRL_BORDER event.
 554  *
 555  * Global libvo variables changed:
 556  * vo_border
 557  */
 558 void vo_w32_border(void) {
 559     vo_border = !vo_border;
 560     createRenderingContext();
 561 }
 562
 563 /**
 564  * \brief Toogle window ontop attribute.
 565  *
 566  * Should be called on VOCTRL_ONTOP event.
 567  *
 568  * Global libvo variables changed:
 569  * vo_ontop
 570  */
 571 void vo_w32_ontop( void )
 572 {
 573     vo_ontop = !vo_ontop;
 574     if (!vo_fs) {
 575         createRenderingContext();
 576     }
 577 }
 578
 579 /**
 580  * \brief Uninitialize w32_common framework.
 581  *
 582  * Should be called last in video driver's uninit function. First release
 583  * anything built on top of the created window e.g. rendering context inside
 584  * and call vo_w32_uninit at the end.
 585  */
 586 void vo_w32_uninit(void) {
 587     mp_msg(MSGT_VO, MSGL_V, "vo: win32: uninit\n");
 588     resetMode();
 589     ShowCursor(1);
 590     depthonscreen = 0;
 591     if (dev_hdc) DeleteDC(dev_hdc);
 592     dev_hdc = 0;
 593     DestroyWindow(vo_window);
 594     vo_window = 0;
 595     UnregisterClass(classname, 0);
 596 }
 597
 598 /**
 599  * \brief get a device context to draw in
 600  *
 601  * \param wnd window the DC should belong to if it makes sense
 602  */
 603 HDC vo_w32_get_dc(HWND wnd) {
 604     if (dev_hdc) return dev_hdc;
 605     return GetDC(wnd);
 606 }
 607
 608 /**
 609  * \brief release a device context
 610  *
 611  * \param wnd window the DC probably belongs to
 612  */
 613 void vo_w32_release_dc(HWND wnd, HDC dc) {
 614     if (dev_hdc) return;
 615     ReleaseDC(wnd, dc);
 616 }