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_interface.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 static void FirstSwap( vout_thread_t * );
  58
  59 /*****************************************************************************
  60  * Module descriptor
  61  *****************************************************************************/
  62 vlc_module_begin();
  63     set_category( CAT_VIDEO );
  64     set_subcategory( SUBCAT_VIDEO_VOUT );
  65     set_shortname( "OpenGL" );
  66     set_description( _("OpenGL video output") );
  67     set_capability( "opengl provider", 100 );
  68     add_shortcut( "glwin32" );
  69     set_callbacks( OpenVideo, CloseVideo );
  70
  71     /* FIXME: Hack to avoid unregistering our window class */
  72     linked_with_a_crap_library_which_uses_atexit( );
  73 vlc_module_end();
  74
  75 #if 0 /* FIXME */
  76     /* check if we registered a window class because we need to
  77      * unregister it */
  78     WNDCLASS wndclass;
  79     if( GetClassInfo( GetModuleHandle(NULL), "VLC DirectX", &wndclass ) )
  80         UnregisterClass( "VLC DirectX", GetModuleHandle(NULL) );
  81 #endif
  82
  83 /*****************************************************************************
  84  * OpenVideo: allocate OpenGL provider
  85  *****************************************************************************
  86  * This function creates and initializes a video window.
  87  *****************************************************************************/
  88 static int OpenVideo( vlc_object_t *p_this )
  89 {
  90     vout_thread_t * p_vout = (vout_thread_t *)p_this;
  91     vlc_value_t val;
  92
  93     /* Allocate structure */
  94     p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
  95     if( p_vout->p_sys == NULL )
  96     {
  97         msg_Err( p_vout, "out of memory" );
  98         return VLC_ENOMEM;
  99     }
 100     memset( p_vout->p_sys, 0, sizeof( vout_sys_t ) );
 101
 102     /* Initialisations */
 103     p_vout->pf_init = Init;
 104     p_vout->pf_end = End;
 105     p_vout->pf_manage = Manage;
 106     p_vout->pf_swap = FirstSwap;
 107
 108     p_vout->p_sys->hwnd = p_vout->p_sys->hvideownd = NULL;
 109     p_vout->p_sys->hparent = p_vout->p_sys->hfswnd = NULL;
 110     p_vout->p_sys->i_changes = 0;
 111     p_vout->p_sys->b_wallpaper = 0;
 112     vlc_mutex_init( p_vout, &p_vout->p_sys->lock );
 113     SetRectEmpty( &p_vout->p_sys->rect_display );
 114     SetRectEmpty( &p_vout->p_sys->rect_parent );
 115
 116     var_Create( p_vout, "video-title", VLC_VAR_STRING | VLC_VAR_DOINHERIT );
 117
 118     p_vout->p_sys->b_cursor_hidden = 0;
 119     p_vout->p_sys->i_lastmoved = mdate();
 120
 121     /* Set main window's size */
 122     p_vout->p_sys->i_window_width = p_vout->i_window_width;
 123     p_vout->p_sys->i_window_height = p_vout->i_window_height;
 124
 125     /* Create the DirectXEventThread, this thread is created by us to isolate
 126      * the Win32 PeekMessage function calls. We want to do this because
 127      * Windows can stay blocked inside this call for a long time, and when
 128      * this happens it thus blocks vlc's video_output thread.
 129      * DirectXEventThread will take care of the creation of the video
 130      * window (because PeekMessage has to be called from the same thread which
 131      * created the window). */
 132     msg_Dbg( p_vout, "creating DirectXEventThread" );
 133     p_vout->p_sys->p_event =
 134         vlc_object_create( p_vout, sizeof(event_thread_t) );
 135     p_vout->p_sys->p_event->p_vout = p_vout;
 136     if( vlc_thread_create( p_vout->p_sys->p_event, "DirectX Events Thread",
 137                            E_(DirectXEventThread), 0, 1 ) )
 138     {
 139         msg_Err( p_vout, "cannot create DirectXEventThread" );
 140         vlc_object_destroy( p_vout->p_sys->p_event );
 141         p_vout->p_sys->p_event = NULL;
 142         goto error;
 143     }
 144
 145     if( p_vout->p_sys->p_event->b_error )
 146     {
 147         msg_Err( p_vout, "DirectXEventThread failed" );
 148         goto error;
 149     }
 150
 151     vlc_object_attach( p_vout->p_sys->p_event, p_vout );
 152
 153     msg_Dbg( p_vout, "DirectXEventThread running" );
 154
 155     /* Variable to indicate if the window should be on top of others */
 156     /* Trigger a callback right now */
 157     var_Get( p_vout, "video-on-top", &val );
 158     var_Set( p_vout, "video-on-top", val );
 159
 160     return VLC_SUCCESS;
 161
 162  error:
 163     CloseVideo( VLC_OBJECT(p_vout) );
 164     return VLC_EGENERIC;
 165 }
 166
 167 /*****************************************************************************
 168  * Init: initialize video thread output method
 169  *****************************************************************************/
 170 static int Init( vout_thread_t *p_vout )
 171 {
 172     PIXELFORMATDESCRIPTOR pfd;
 173     int iFormat;
 174
 175     /* Change the window title bar text */
 176     PostMessage( p_vout->p_sys->hwnd, WM_VLC_CHANGE_TEXT, 0, 0 );
 177
 178     p_vout->p_sys->hGLDC = GetDC( p_vout->p_sys->hvideownd );
 179
 180     /* Set the pixel format for the DC */
 181     memset( &pfd, 0, sizeof( pfd ) );
 182     pfd.nSize = sizeof( pfd );
 183     pfd.nVersion = 1;
 184     pfd.dwFlags = PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER;
 185     pfd.iPixelType = PFD_TYPE_RGBA;
 186     pfd.cColorBits = 24;
 187     pfd.cDepthBits = 16;
 188     pfd.iLayerType = PFD_MAIN_PLANE;
 189     iFormat = ChoosePixelFormat( p_vout->p_sys->hGLDC, &pfd );
 190     SetPixelFormat( p_vout->p_sys->hGLDC, iFormat, &pfd );
 191
 192     /* Create and enable the render context */
 193     p_vout->p_sys->hGLRC = wglCreateContext( p_vout->p_sys->hGLDC );
 194     wglMakeCurrent( p_vout->p_sys->hGLDC, p_vout->p_sys->hGLRC );
 195
 196     return VLC_SUCCESS;
 197 }
 198
 199 /*****************************************************************************
 200  * End: terminate Sys video thread output method
 201  *****************************************************************************
 202  * Terminate an output method created by Create.
 203  * It is called at the end of the thread.
 204  *****************************************************************************/
 205 static void End( vout_thread_t *p_vout )
 206 {
 207     wglMakeCurrent( NULL, NULL );
 208     wglDeleteContext( p_vout->p_sys->hGLRC );
 209     ReleaseDC( p_vout->p_sys->hvideownd, p_vout->p_sys->hGLDC );
 210     return;
 211 }
 212
 213 /*****************************************************************************
 214  * CloseVideo: destroy Sys video thread output method
 215  *****************************************************************************
 216  * Terminate an output method created by Create
 217  *****************************************************************************/
 218 static void CloseVideo( vlc_object_t *p_this )
 219 {
 220     vout_thread_t * p_vout = (vout_thread_t *)p_this;
 221
 222     msg_Dbg( p_vout, "closing video" );
 223
 224     if( p_vout->p_sys->p_event )
 225     {
 226         vlc_object_detach( p_vout->p_sys->p_event );
 227
 228         /* Kill DirectXEventThread */
 229         p_vout->p_sys->p_event->b_die = VLC_TRUE;
 230
 231         /* we need to be sure DirectXEventThread won't stay stuck in
 232          * GetMessage, so we send a fake message */
 233         if( p_vout->p_sys->hwnd )
 234         {
 235             PostMessage( p_vout->p_sys->hwnd, WM_NULL, 0, 0);
 236         }
 237
 238         vlc_thread_join( p_vout->p_sys->p_event );
 239         vlc_object_destroy( p_vout->p_sys->p_event );
 240     }
 241
 242     vlc_mutex_destroy( &p_vout->p_sys->lock );
 243
 244     if( p_vout->p_sys )
 245     {
 246         free( p_vout->p_sys );
 247         p_vout->p_sys = NULL;
 248     }
 249 }
 250
 251 /*****************************************************************************
 252  * Manage: handle Sys events
 253  *****************************************************************************
 254  * This function should be called regularly by the video output thread.
 255  * It returns a non null value if an error occurred.
 256  *****************************************************************************/
 257 static int Manage( vout_thread_t *p_vout )
 258 {
 259     int i_width = p_vout->p_sys->rect_dest.right -
 260         p_vout->p_sys->rect_dest.left;
 261     int i_height = p_vout->p_sys->rect_dest.bottom -
 262         p_vout->p_sys->rect_dest.top;
 263     glViewport( 0, 0, i_width, i_height );
 264
 265     /* If we do not control our window, we check for geometry changes
 266      * ourselves because the parent might not send us its events. */
 267     vlc_mutex_lock( &p_vout->p_sys->lock );
 268     if( p_vout->p_sys->hparent && !p_vout->b_fullscreen )
 269     {
 270         RECT rect_parent;
 271         POINT point;
 272
 273         vlc_mutex_unlock( &p_vout->p_sys->lock );
 274
 275         GetClientRect( p_vout->p_sys->hparent, &rect_parent );
 276         point.x = point.y = 0;
 277         ClientToScreen( p_vout->p_sys->hparent, &point );
 278         OffsetRect( &rect_parent, point.x, point.y );
 279
 280         if( !EqualRect( &rect_parent, &p_vout->p_sys->rect_parent ) )
 281         {
 282             p_vout->p_sys->rect_parent = rect_parent;
 283
 284             /* This one is to force the update even if only
 285              * the position has changed */
 286             SetWindowPos( p_vout->p_sys->hwnd, 0, 1, 1,
 287                           rect_parent.right - rect_parent.left,
 288                           rect_parent.bottom - rect_parent.top, 0 );
 289
 290             SetWindowPos( p_vout->p_sys->hwnd, 0, 0, 0,
 291                           rect_parent.right - rect_parent.left,
 292                           rect_parent.bottom - rect_parent.top, 0 );
 293         }
 294     }
 295     else
 296     {
 297         vlc_mutex_unlock( &p_vout->p_sys->lock );
 298     }
 299
 300     /* Check for cropping / aspect changes */
 301     if( p_vout->i_changes & VOUT_CROP_CHANGE ||
 302         p_vout->i_changes & VOUT_ASPECT_CHANGE )
 303     {
 304         p_vout->i_changes &= ~VOUT_CROP_CHANGE;
 305         p_vout->i_changes &= ~VOUT_ASPECT_CHANGE;
 306
 307         p_vout->fmt_out.i_x_offset = p_vout->fmt_in.i_x_offset;
 308         p_vout->fmt_out.i_y_offset = p_vout->fmt_in.i_y_offset;
 309         p_vout->fmt_out.i_visible_width = p_vout->fmt_in.i_visible_width;
 310         p_vout->fmt_out.i_visible_height = p_vout->fmt_in.i_visible_height;
 311         p_vout->fmt_out.i_aspect = p_vout->fmt_in.i_aspect;
 312         p_vout->fmt_out.i_sar_num = p_vout->fmt_in.i_sar_num;
 313         p_vout->fmt_out.i_sar_den = p_vout->fmt_in.i_sar_den;
 314         p_vout->output.i_aspect = p_vout->fmt_in.i_aspect;
 315         E_(DirectXUpdateRects)( p_vout, VLC_TRUE );
 316     }
 317
 318     /* We used to call the Win32 PeekMessage function here to read the window
 319      * messages. But since window can stay blocked into this function for a
 320      * long time (for example when you move your window on the screen), I
 321      * decided to isolate PeekMessage in another thread. */
 322
 323     /*
 324      * Fullscreen change
 325      */
 326     if( p_vout->i_changes & VOUT_FULLSCREEN_CHANGE
 327         || p_vout->p_sys->i_changes & VOUT_FULLSCREEN_CHANGE )
 328     {
 329         Win32ToggleFullscreen( p_vout );
 330
 331         p_vout->i_changes &= ~VOUT_FULLSCREEN_CHANGE;
 332         p_vout->p_sys->i_changes &= ~VOUT_FULLSCREEN_CHANGE;
 333     }
 334
 335     /*
 336      * Pointer change
 337      */
 338     if( p_vout->b_fullscreen && !p_vout->p_sys->b_cursor_hidden &&
 339         (mdate() - p_vout->p_sys->i_lastmoved) > 5000000 )
 340     {
 341         POINT point;
 342         HWND hwnd;
 343
 344         /* Hide the cursor only if it is inside our window */
 345         GetCursorPos( &point );
 346         hwnd = WindowFromPoint(point);
 347         if( hwnd == p_vout->p_sys->hwnd || hwnd == p_vout->p_sys->hvideownd )
 348         {
 349             PostMessage( p_vout->p_sys->hwnd, WM_VLC_HIDE_MOUSE, 0, 0 );
 350         }
 351         else
 352         {
 353             p_vout->p_sys->i_lastmoved = mdate();
 354         }
 355     }
 356
 357     /*
 358      * "Always on top" status change
 359      */
 360     if( p_vout->p_sys->b_on_top_change )
 361     {
 362         vlc_value_t val;
 363         HMENU hMenu = GetSystemMenu( p_vout->p_sys->hwnd, FALSE );
 364
 365         var_Get( p_vout, "video-on-top", &val );
 366
 367         /* Set the window on top if necessary */
 368         if( val.b_bool && !( GetWindowLong( p_vout->p_sys->hwnd, GWL_EXSTYLE )
 369                            & WS_EX_TOPMOST ) )
 370         {
 371             CheckMenuItem( hMenu, IDM_TOGGLE_ON_TOP,
 372                            MF_BYCOMMAND | MFS_CHECKED );
 373             SetWindowPos( p_vout->p_sys->hwnd, HWND_TOPMOST, 0, 0, 0, 0,
 374                           SWP_NOSIZE | SWP_NOMOVE );
 375         }
 376         else
 377         /* The window shouldn't be on top */
 378         if( !val.b_bool && ( GetWindowLong( p_vout->p_sys->hwnd, GWL_EXSTYLE )
 379                            & WS_EX_TOPMOST ) )
 380         {
 381             CheckMenuItem( hMenu, IDM_TOGGLE_ON_TOP,
 382                            MF_BYCOMMAND | MFS_UNCHECKED );
 383             SetWindowPos( p_vout->p_sys->hwnd, HWND_NOTOPMOST, 0, 0, 0, 0,
 384                           SWP_NOSIZE | SWP_NOMOVE );
 385         }
 386
 387         p_vout->p_sys->b_on_top_change = VLC_FALSE;
 388     }
 389
 390     /* Check if the event thread is still running */
 391     if( p_vout->p_sys->p_event->b_die )
 392     {
 393         return VLC_EGENERIC; /* exit */
 394     }
 395
 396     return VLC_SUCCESS;
 397 }
 398
 399 /*****************************************************************************
 400  * GLSwapBuffers: swap front/back buffers
 401  *****************************************************************************/
 402 static void GLSwapBuffers( vout_thread_t *p_vout )
 403 {
 404     SwapBuffers( p_vout->p_sys->hGLDC );
 405 }
 406
 407 /*
 408 ** this function is only used once when the first picture is received
 409 ** this function will show the video window once a picture is ready
 410 */
 411
 412 static void FirstSwap( vout_thread_t *p_vout )
 413 {
 414     /* get initial picture buffer swapped to front buffer */
 415     GLSwapBuffers( p_vout );
 416
 417     /*
 418     ** Video window is initially hidden, show it now since we got a
 419     ** picture to show.
 420     */
 421     SetWindowPos( p_vout->p_sys->hvideownd, NULL, 0, 0, 0, 0,
 422         SWP_ASYNCWINDOWPOS|
 423         SWP_FRAMECHANGED|
 424         SWP_SHOWWINDOW|
 425         SWP_NOMOVE|
 426         SWP_NOSIZE|
 427         SWP_NOZORDER );
 428
 429     /* use and restores proper swap function for further pictures */
 430     p_vout->pf_swap = GLSwapBuffers;
 431 }