git.sesse.net Git - vlc/blob - modules/video_output/directx/glwin32.c

   1 /*****************************************************************************
   2  * glwin32.c: Windows OpenGL provider
   3  *****************************************************************************
   4  * Copyright (C) 2001-2004 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Gildas Bazin <gbazin@videolan.org>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 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 General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  22  *****************************************************************************/
  23
  24 #include <errno.h>                                                 /* ENOMEM */
  25 #include <stdlib.h>                                                /* free() */
  26 #include <string.h>                                            /* strerror() */
  27
  28 #include <vlc/vlc.h>
  29 #include <vlc/intf.h>
  30 #include <vlc/vout.h>
  31
  32 #include <windows.h>
  33 #include <ddraw.h>
  34 #include <commctrl.h>
  35
  36 #include <multimon.h>
  37 #undef GetSystemMetrics
  38
  39 #ifndef MONITOR_DEFAULTTONEAREST
  40 #   define MONITOR_DEFAULTTONEAREST 2
  41 #endif
  42
  43 #include <GL/gl.h>
  44
  45 #include "vout.h"
  46
  47 /*****************************************************************************
  48  * Local prototypes.
  49  *****************************************************************************/
  50 static int  OpenVideo  ( vlc_object_t * );
  51 static void CloseVideo ( vlc_object_t * );
  52
  53 static int  Init      ( vout_thread_t * );
  54 static void End       ( vout_thread_t * );
  55 static int  Manage    ( vout_thread_t * );
  56 static void GLSwapBuffers( vout_thread_t * );
  57
  58 /*****************************************************************************
  59  * Module descriptor
  60  *****************************************************************************/
  61 vlc_module_begin();
  62     set_category( CAT_VIDEO );
  63     set_subcategory( SUBCAT_VIDEO_VOUT );
  64     set_shortname( "OpenGL" );
  65     set_description( _("OpenGL video output") );
  66     set_capability( "opengl provider", 100 );
  67     add_shortcut( "glwin32" );
  68     set_callbacks( OpenVideo, CloseVideo );
  69
  70     /* FIXME: Hack to avoid unregistering our window class */
  71     linked_with_a_crap_library_which_uses_atexit( );
  72 vlc_module_end();
  73
  74 #if 0 /* FIXME */
  75     /* check if we registered a window class because we need to
  76      * unregister it */
  77     WNDCLASS wndclass;
  78     if( GetClassInfo( GetModuleHandle(NULL), "VLC DirectX", &wndclass ) )
  79         UnregisterClass( "VLC DirectX", GetModuleHandle(NULL) );
  80 #endif
  81
  82 /*****************************************************************************
  83  * OpenVideo: allocate OpenGL provider
  84  *****************************************************************************
  85  * This function creates and initializes a video window.
  86  *****************************************************************************/
  87 static int OpenVideo( vlc_object_t *p_this )
  88 {
  89     vout_thread_t * p_vout = (vout_thread_t *)p_this;
  90     vlc_value_t val;
  91
  92     /* Allocate structure */
  93     p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
  94     if( p_vout->p_sys == NULL )
  95     {
  96         msg_Err( p_vout, "out of memory" );
  97         return VLC_ENOMEM;
  98     }
  99     memset( p_vout->p_sys, 0, sizeof( vout_sys_t ) );
 100
 101     /* Initialisations */
 102     p_vout->pf_init = Init;
 103     p_vout->pf_end = End;
 104     p_vout->pf_manage = Manage;
 105     p_vout->pf_swap = GLSwapBuffers;
 106
 107     p_vout->p_sys->hwnd = p_vout->p_sys->hvideownd = NULL;
 108     p_vout->p_sys->hparent = p_vout->p_sys->hfswnd = NULL;
 109     p_vout->p_sys->i_changes = 0;
 110     p_vout->p_sys->b_wallpaper = 0;
 111     vlc_mutex_init( p_vout, &p_vout->p_sys->lock );
 112     SetRectEmpty( &p_vout->p_sys->rect_display );
 113     SetRectEmpty( &p_vout->p_sys->rect_parent );
 114
 115     var_Create( p_vout, "video-title", VLC_VAR_STRING | VLC_VAR_DOINHERIT );
 116
 117     p_vout->p_sys->b_cursor_hidden = 0;
 118     p_vout->p_sys->i_lastmoved = mdate();
 119
 120     /* Set main window's size */
 121     p_vout->p_sys->i_window_width = p_vout->i_window_width;
 122     p_vout->p_sys->i_window_height = p_vout->i_window_height;
 123
 124     /* Create the DirectXEventThread, this thread is created by us to isolate
 125      * the Win32 PeekMessage function calls. We want to do this because
 126      * Windows can stay blocked inside this call for a long time, and when
 127      * this happens it thus blocks vlc's video_output thread.
 128      * DirectXEventThread will take care of the creation of the video
 129      * window (because PeekMessage has to be called from the same thread which
 130      * created the window). */
 131     msg_Dbg( p_vout, "creating DirectXEventThread" );
 132     p_vout->p_sys->p_event =
 133         vlc_object_create( p_vout, sizeof(event_thread_t) );
 134     p_vout->p_sys->p_event->p_vout = p_vout;
 135     if( vlc_thread_create( p_vout->p_sys->p_event, "DirectX Events Thread",
 136                            E_(DirectXEventThread), 0, 1 ) )
 137     {
 138         msg_Err( p_vout, "cannot create DirectXEventThread" );
 139         vlc_object_destroy( p_vout->p_sys->p_event );
 140         p_vout->p_sys->p_event = NULL;
 141         goto error;
 142     }
 143
 144     if( p_vout->p_sys->p_event->b_error )
 145     {
 146         msg_Err( p_vout, "DirectXEventThread failed" );
 147         goto error;
 148     }
 149
 150     vlc_object_attach( p_vout->p_sys->p_event, p_vout );
 151
 152     msg_Dbg( p_vout, "DirectXEventThread running" );
 153
 154     /* Variable to indicate if the window should be on top of others */
 155     /* Trigger a callback right now */
 156     var_Get( p_vout, "video-on-top", &val );
 157     var_Set( p_vout, "video-on-top", val );
 158
 159     return VLC_SUCCESS;
 160
 161  error:
 162     CloseVideo( VLC_OBJECT(p_vout) );
 163     return VLC_EGENERIC;
 164 }
 165
 166 /*****************************************************************************
 167  * Init: initialize video thread output method
 168  *****************************************************************************/
 169 static int Init( vout_thread_t *p_vout )
 170 {
 171     PIXELFORMATDESCRIPTOR pfd;
 172     int iFormat;
 173
 174     /* Change the window title bar text */
 175     PostMessage( p_vout->p_sys->hwnd, WM_VLC_CHANGE_TEXT, 0, 0 );
 176
 177     p_vout->p_sys->hGLDC = GetDC( p_vout->p_sys->hvideownd );
 178
 179     /* Set the pixel format for the DC */
 180     memset( &pfd, 0, sizeof( pfd ) );
 181     pfd.nSize = sizeof( pfd );
 182     pfd.nVersion = 1;
 183     pfd.dwFlags = PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER;
 184     pfd.iPixelType = PFD_TYPE_RGBA;
 185     pfd.cColorBits = 24;
 186     pfd.cDepthBits = 16;
 187     pfd.iLayerType = PFD_MAIN_PLANE;
 188     iFormat = ChoosePixelFormat( p_vout->p_sys->hGLDC, &pfd );
 189     SetPixelFormat( p_vout->p_sys->hGLDC, iFormat, &pfd );
 190
 191     /* Create and enable the render context */
 192     p_vout->p_sys->hGLRC = wglCreateContext( p_vout->p_sys->hGLDC );
 193     wglMakeCurrent( p_vout->p_sys->hGLDC, p_vout->p_sys->hGLRC );
 194
 195     return VLC_SUCCESS;
 196 }
 197
 198 /*****************************************************************************
 199  * End: terminate Sys video thread output method
 200  *****************************************************************************
 201  * Terminate an output method created by Create.
 202  * It is called at the end of the thread.
 203  *****************************************************************************/
 204 static void End( vout_thread_t *p_vout )
 205 {
 206     wglMakeCurrent( NULL, NULL );
 207     wglDeleteContext( p_vout->p_sys->hGLRC );
 208     ReleaseDC( p_vout->p_sys->hvideownd, p_vout->p_sys->hGLDC );
 209     return;
 210 }
 211
 212 /*****************************************************************************
 213  * CloseVideo: destroy Sys video thread output method
 214  *****************************************************************************
 215  * Terminate an output method created by Create
 216  *****************************************************************************/
 217 static void CloseVideo( vlc_object_t *p_this )
 218 {
 219     vout_thread_t * p_vout = (vout_thread_t *)p_this;
 220
 221     msg_Dbg( p_vout, "closing video" );
 222
 223     if( p_vout->p_sys->p_event )
 224     {
 225         vlc_object_detach( p_vout->p_sys->p_event );
 226
 227         /* Kill DirectXEventThread */
 228         p_vout->p_sys->p_event->b_die = VLC_TRUE;
 229
 230         /* we need to be sure DirectXEventThread won't stay stuck in
 231          * GetMessage, so we send a fake message */
 232         if( p_vout->p_sys->hwnd )
 233         {
 234             PostMessage( p_vout->p_sys->hwnd, WM_NULL, 0, 0);
 235         }
 236
 237         vlc_thread_join( p_vout->p_sys->p_event );
 238         vlc_object_destroy( p_vout->p_sys->p_event );
 239     }
 240
 241     vlc_mutex_destroy( &p_vout->p_sys->lock );
 242
 243     if( p_vout->p_sys )
 244     {
 245         free( p_vout->p_sys );
 246         p_vout->p_sys = NULL;
 247     }
 248 }
 249
 250 /*****************************************************************************
 251  * Manage: handle Sys events
 252  *****************************************************************************
 253  * This function should be called regularly by the video output thread.
 254  * It returns a non null value if an error occurred.
 255  *****************************************************************************/
 256 static int Manage( vout_thread_t *p_vout )
 257 {
 258     WINDOWPLACEMENT window_placement;
 259
 260     int i_width = p_vout->p_sys->rect_dest.right -
 261         p_vout->p_sys->rect_dest.left;
 262     int i_height = p_vout->p_sys->rect_dest.bottom -
 263         p_vout->p_sys->rect_dest.top;
 264     glViewport( 0, 0, i_width, i_height );
 265
 266     /* If we do not control our window, we check for geometry changes
 267      * ourselves because the parent might not send us its events. */
 268     vlc_mutex_lock( &p_vout->p_sys->lock );
 269     if( p_vout->p_sys->hparent && !p_vout->b_fullscreen )
 270     {
 271         RECT rect_parent;
 272         POINT point;
 273
 274         vlc_mutex_unlock( &p_vout->p_sys->lock );
 275
 276         GetClientRect( p_vout->p_sys->hparent, &rect_parent );
 277         point.x = point.y = 0;
 278         ClientToScreen( p_vout->p_sys->hparent, &point );
 279         OffsetRect( &rect_parent, point.x, point.y );
 280
 281         if( !EqualRect( &rect_parent, &p_vout->p_sys->rect_parent ) )
 282         {
 283             p_vout->p_sys->rect_parent = rect_parent;
 284
 285             /* This one is to force the update even if only
 286              * the position has changed */
 287             SetWindowPos( p_vout->p_sys->hwnd, 0, 1, 1,
 288                           rect_parent.right - rect_parent.left,
 289                           rect_parent.bottom - rect_parent.top, 0 );
 290
 291             SetWindowPos( p_vout->p_sys->hwnd, 0, 0, 0,
 292                           rect_parent.right - rect_parent.left,
 293                           rect_parent.bottom - rect_parent.top, 0 );
 294         }
 295     }
 296     else
 297     {
 298         vlc_mutex_unlock( &p_vout->p_sys->lock );
 299     }
 300
 301     /* Check for cropping / aspect changes */
 302     if( p_vout->i_changes & VOUT_CROP_CHANGE ||
 303         p_vout->i_changes & VOUT_ASPECT_CHANGE )
 304     {
 305         p_vout->i_changes &= ~VOUT_CROP_CHANGE;
 306         p_vout->i_changes &= ~VOUT_ASPECT_CHANGE;
 307
 308         p_vout->fmt_out.i_x_offset = p_vout->fmt_in.i_x_offset;
 309         p_vout->fmt_out.i_y_offset = p_vout->fmt_in.i_y_offset;
 310         p_vout->fmt_out.i_visible_width = p_vout->fmt_in.i_visible_width;
 311         p_vout->fmt_out.i_visible_height = p_vout->fmt_in.i_visible_height;
 312         p_vout->fmt_out.i_aspect = p_vout->fmt_in.i_aspect;
 313         p_vout->fmt_out.i_sar_num = p_vout->fmt_in.i_sar_num;
 314         p_vout->fmt_out.i_sar_den = p_vout->fmt_in.i_sar_den;
 315         p_vout->output.i_aspect = p_vout->fmt_in.i_aspect;
 316         E_(DirectXUpdateRects)( p_vout, VLC_TRUE );
 317     }
 318
 319     /* We used to call the Win32 PeekMessage function here to read the window
 320      * messages. But since window can stay blocked into this function for a
 321      * long time (for example when you move your window on the screen), I
 322      * decided to isolate PeekMessage in another thread. */
 323
 324     /*
 325      * Fullscreen change
 326      */
 327     if( p_vout->i_changes & VOUT_FULLSCREEN_CHANGE
 328         || p_vout->p_sys->i_changes & VOUT_FULLSCREEN_CHANGE )
 329     {
 330         vlc_value_t val;
 331         HWND hwnd = (p_vout->p_sys->hparent && p_vout->p_sys->hfswnd) ?
 332             p_vout->p_sys->hfswnd : p_vout->p_sys->hwnd;
 333
 334         p_vout->b_fullscreen = ! p_vout->b_fullscreen;
 335
 336         /* We need to switch between Maximized and Normal sized window */
 337         window_placement.length = sizeof(WINDOWPLACEMENT);
 338         GetWindowPlacement( hwnd, &window_placement );
 339         if( p_vout->b_fullscreen )
 340         {
 341             /* Change window style, no borders and no title bar */
 342             int i_style = WS_CLIPCHILDREN | WS_VISIBLE;
 343             SetWindowLong( hwnd, GWL_STYLE, i_style );
 344
 345             if( p_vout->p_sys->hparent )
 346             {
 347                 /* Retrieve current window position so fullscreen will happen
 348                  * on the right screen */
 349                 POINT point = {0,0};
 350                 RECT rect;
 351                 ClientToScreen( p_vout->p_sys->hwnd, &point );
 352                 GetClientRect( p_vout->p_sys->hwnd, &rect );
 353                 SetWindowPos( hwnd, 0, point.x, point.y,
 354                               rect.right, rect.bottom,
 355                               SWP_NOZORDER|SWP_FRAMECHANGED );
 356                 GetWindowPlacement( hwnd, &window_placement );
 357             }
 358
 359             /* Maximize window */
 360             window_placement.showCmd = SW_SHOWMAXIMIZED;
 361             SetWindowPlacement( hwnd, &window_placement );
 362             SetWindowPos( hwnd, 0, 0, 0, 0, 0,
 363                           SWP_NOMOVE|SWP_NOSIZE|SWP_NOZORDER|SWP_FRAMECHANGED);
 364
 365             if( p_vout->p_sys->hparent )
 366             {
 367                 RECT rect;
 368                 GetClientRect( hwnd, &rect );
 369                 SetParent( p_vout->p_sys->hwnd, hwnd );
 370                 SetWindowPos( p_vout->p_sys->hwnd, 0, 0, 0,
 371                               rect.right, rect.bottom,
 372                               SWP_NOZORDER|SWP_FRAMECHANGED );
 373             }
 374
 375             SetForegroundWindow( hwnd );
 376         }
 377         else
 378         {
 379             /* Change window style, no borders and no title bar */
 380             SetWindowLong( hwnd, GWL_STYLE, p_vout->p_sys->i_window_style );
 381
 382             /* Normal window */
 383             window_placement.showCmd = SW_SHOWNORMAL;
 384             SetWindowPlacement( hwnd, &window_placement );
 385             SetWindowPos( hwnd, 0, 0, 0, 0, 0,
 386                           SWP_NOMOVE|SWP_NOSIZE|SWP_NOZORDER|SWP_FRAMECHANGED);
 387
 388             if( p_vout->p_sys->hparent )
 389             {
 390                 RECT rect;
 391                 GetClientRect( p_vout->p_sys->hparent, &rect );
 392                 SetParent( p_vout->p_sys->hwnd, p_vout->p_sys->hparent );
 393                 SetWindowPos( p_vout->p_sys->hwnd, 0, 0, 0,
 394                               rect.right, rect.bottom,
 395                               SWP_NOZORDER|SWP_FRAMECHANGED );
 396
 397                 ShowWindow( hwnd, SW_HIDE );
 398                 SetForegroundWindow( p_vout->p_sys->hparent );
 399             }
 400
 401             /* Make sure the mouse cursor is displayed */
 402             PostMessage( p_vout->p_sys->hwnd, WM_VLC_SHOW_MOUSE, 0, 0 );
 403         }
 404
 405         /* Update the object variable and trigger callback */
 406         val.b_bool = p_vout->b_fullscreen;
 407         var_Set( p_vout, "fullscreen", val );
 408
 409         p_vout->i_changes &= ~VOUT_FULLSCREEN_CHANGE;
 410         p_vout->p_sys->i_changes &= ~VOUT_FULLSCREEN_CHANGE;
 411     }
 412
 413     /*
 414      * Pointer change
 415      */
 416     if( p_vout->b_fullscreen && !p_vout->p_sys->b_cursor_hidden &&
 417         (mdate() - p_vout->p_sys->i_lastmoved) > 5000000 )
 418     {
 419         POINT point;
 420         HWND hwnd;
 421
 422         /* Hide the cursor only if it is inside our window */
 423         GetCursorPos( &point );
 424         hwnd = WindowFromPoint(point);
 425         if( hwnd == p_vout->p_sys->hwnd || hwnd == p_vout->p_sys->hvideownd )
 426         {
 427             PostMessage( p_vout->p_sys->hwnd, WM_VLC_HIDE_MOUSE, 0, 0 );
 428         }
 429         else
 430         {
 431             p_vout->p_sys->i_lastmoved = mdate();
 432         }
 433     }
 434
 435     /*
 436      * "Always on top" status change
 437      */
 438     if( p_vout->p_sys->b_on_top_change )
 439     {
 440         vlc_value_t val;
 441         HMENU hMenu = GetSystemMenu( p_vout->p_sys->hwnd, FALSE );
 442
 443         var_Get( p_vout, "video-on-top", &val );
 444
 445         /* Set the window on top if necessary */
 446         if( val.b_bool && !( GetWindowLong( p_vout->p_sys->hwnd, GWL_EXSTYLE )
 447                            & WS_EX_TOPMOST ) )
 448         {
 449             CheckMenuItem( hMenu, IDM_TOGGLE_ON_TOP,
 450                            MF_BYCOMMAND | MFS_CHECKED );
 451             SetWindowPos( p_vout->p_sys->hwnd, HWND_TOPMOST, 0, 0, 0, 0,
 452                           SWP_NOSIZE | SWP_NOMOVE );
 453         }
 454         else
 455         /* The window shouldn't be on top */
 456         if( !val.b_bool && ( GetWindowLong( p_vout->p_sys->hwnd, GWL_EXSTYLE )
 457                            & WS_EX_TOPMOST ) )
 458         {
 459             CheckMenuItem( hMenu, IDM_TOGGLE_ON_TOP,
 460                            MF_BYCOMMAND | MFS_UNCHECKED );
 461             SetWindowPos( p_vout->p_sys->hwnd, HWND_NOTOPMOST, 0, 0, 0, 0,
 462                           SWP_NOSIZE | SWP_NOMOVE );
 463         }
 464
 465         p_vout->p_sys->b_on_top_change = VLC_FALSE;
 466     }
 467
 468     /* Check if the event thread is still running */
 469     if( p_vout->p_sys->p_event->b_die )
 470     {
 471         return VLC_EGENERIC; /* exit */
 472     }
 473
 474     return VLC_SUCCESS;
 475 }
 476
 477 /*****************************************************************************
 478  * GLSwapBuffers: swap front/back buffers
 479  *****************************************************************************/
 480 static void GLSwapBuffers( vout_thread_t *p_vout )
 481 {
 482     SwapBuffers( p_vout->p_sys->hGLDC );
 483 }