1 /*****************************************************************************
2 * glwin32.c: Windows OpenGL provider
3 *****************************************************************************
4 * Copyright (C) 2001-2004 the VideoLAN team
7 * Authors: Gildas Bazin <gbazin@videolan.org>
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.
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.
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 *****************************************************************************/
24 #include <errno.h> /* ENOMEM */
27 #include <vlc_interface.h>
35 #undef GetSystemMetrics
37 #ifndef MONITOR_DEFAULTTONEAREST
38 # define MONITOR_DEFAULTTONEAREST 2
45 /*****************************************************************************
47 *****************************************************************************/
48 static int OpenVideo ( vlc_object_t * );
49 static void CloseVideo ( vlc_object_t * );
51 static int Init ( vout_thread_t * );
52 static void End ( vout_thread_t * );
53 static int Manage ( vout_thread_t * );
54 static void GLSwapBuffers( vout_thread_t * );
55 static void FirstSwap( vout_thread_t * );
57 /*****************************************************************************
59 *****************************************************************************/
61 set_category( CAT_VIDEO );
62 set_subcategory( SUBCAT_VIDEO_VOUT );
63 set_shortname( "OpenGL" );
64 set_description( _("OpenGL video output") );
65 set_capability( "opengl provider", 100 );
66 add_shortcut( "glwin32" );
67 set_callbacks( OpenVideo, CloseVideo );
69 /* FIXME: Hack to avoid unregistering our window class */
70 linked_with_a_crap_library_which_uses_atexit( );
74 /* check if we registered a window class because we need to
77 if( GetClassInfo( GetModuleHandle(NULL), "VLC DirectX", &wndclass ) )
78 UnregisterClass( "VLC DirectX", GetModuleHandle(NULL) );
81 /*****************************************************************************
82 * OpenVideo: allocate OpenGL provider
83 *****************************************************************************
84 * This function creates and initializes a video window.
85 *****************************************************************************/
86 static int OpenVideo( vlc_object_t *p_this )
88 vout_thread_t * p_vout = (vout_thread_t *)p_this;
91 /* Allocate structure */
92 p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
93 if( p_vout->p_sys == NULL )
95 msg_Err( p_vout, "out of memory" );
98 memset( p_vout->p_sys, 0, sizeof( vout_sys_t ) );
100 /* Initialisations */
101 p_vout->pf_init = Init;
102 p_vout->pf_end = End;
103 p_vout->pf_manage = Manage;
104 p_vout->pf_swap = FirstSwap;
106 p_vout->p_sys->hwnd = p_vout->p_sys->hvideownd = NULL;
107 p_vout->p_sys->hparent = p_vout->p_sys->hfswnd = NULL;
108 p_vout->p_sys->i_changes = 0;
109 vlc_mutex_init( p_vout, &p_vout->p_sys->lock );
110 SetRectEmpty( &p_vout->p_sys->rect_display );
111 SetRectEmpty( &p_vout->p_sys->rect_parent );
113 var_Create( p_vout, "video-title", VLC_VAR_STRING | VLC_VAR_DOINHERIT );
115 p_vout->p_sys->b_cursor_hidden = 0;
116 p_vout->p_sys->i_lastmoved = mdate();
118 /* Set main window's size */
119 p_vout->p_sys->i_window_width = p_vout->i_window_width;
120 p_vout->p_sys->i_window_height = p_vout->i_window_height;
122 /* Create the Vout EventThread, this thread is created by us to isolate
123 * the Win32 PeekMessage function calls. We want to do this because
124 * Windows can stay blocked inside this call for a long time, and when
125 * this happens it thus blocks vlc's video_output thread.
126 * Vout EventThread will take care of the creation of the video
127 * window (because PeekMessage has to be called from the same thread which
128 * created the window). */
129 msg_Dbg( p_vout, "creating Vout EventThread" );
130 p_vout->p_sys->p_event =
131 vlc_object_create( p_vout, sizeof(event_thread_t) );
132 p_vout->p_sys->p_event->p_vout = p_vout;
133 if( vlc_thread_create( p_vout->p_sys->p_event, "Vout Events Thread",
134 E_(EventThread), 0, 1 ) )
136 msg_Err( p_vout, "cannot create Vout EventThread" );
137 vlc_object_destroy( p_vout->p_sys->p_event );
138 p_vout->p_sys->p_event = NULL;
142 if( p_vout->p_sys->p_event->b_error )
144 msg_Err( p_vout, "Vout EventThread failed" );
148 vlc_object_attach( p_vout->p_sys->p_event, p_vout );
150 msg_Dbg( p_vout, "Vout EventThread running" );
152 /* Variable to indicate if the window should be on top of others */
153 /* Trigger a callback right now */
154 var_Get( p_vout, "video-on-top", &val );
155 var_Set( p_vout, "video-on-top", val );
160 CloseVideo( VLC_OBJECT(p_vout) );
164 /*****************************************************************************
165 * Init: initialize video thread output method
166 *****************************************************************************/
167 static int Init( vout_thread_t *p_vout )
169 PIXELFORMATDESCRIPTOR pfd;
172 /* Change the window title bar text */
173 PostMessage( p_vout->p_sys->hwnd, WM_VLC_CHANGE_TEXT, 0, 0 );
175 p_vout->p_sys->hGLDC = GetDC( p_vout->p_sys->hvideownd );
177 /* Set the pixel format for the DC */
178 memset( &pfd, 0, sizeof( pfd ) );
179 pfd.nSize = sizeof( pfd );
181 pfd.dwFlags = PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER;
182 pfd.iPixelType = PFD_TYPE_RGBA;
185 pfd.iLayerType = PFD_MAIN_PLANE;
186 iFormat = ChoosePixelFormat( p_vout->p_sys->hGLDC, &pfd );
187 SetPixelFormat( p_vout->p_sys->hGLDC, iFormat, &pfd );
189 /* Create and enable the render context */
190 p_vout->p_sys->hGLRC = wglCreateContext( p_vout->p_sys->hGLDC );
191 wglMakeCurrent( p_vout->p_sys->hGLDC, p_vout->p_sys->hGLRC );
196 /*****************************************************************************
197 * End: terminate Sys video thread output method
198 *****************************************************************************
199 * Terminate an output method created by Create.
200 * It is called at the end of the thread.
201 *****************************************************************************/
202 static void End( vout_thread_t *p_vout )
204 wglMakeCurrent( NULL, NULL );
205 wglDeleteContext( p_vout->p_sys->hGLRC );
206 ReleaseDC( p_vout->p_sys->hvideownd, p_vout->p_sys->hGLDC );
210 /*****************************************************************************
211 * CloseVideo: destroy Sys video thread output method
212 *****************************************************************************
213 * Terminate an output method created by Create
214 *****************************************************************************/
215 static void CloseVideo( vlc_object_t *p_this )
217 vout_thread_t * p_vout = (vout_thread_t *)p_this;
219 msg_Dbg( p_vout, "closing video" );
221 if( p_vout->p_sys->p_event )
223 vlc_object_detach( p_vout->p_sys->p_event );
225 /* Kill Vout EventThread */
226 vlc_object_kill( p_vout->p_sys->p_event );
228 /* we need to be sure Vout EventThread won't stay stuck in
229 * GetMessage, so we send a fake message */
230 if( p_vout->p_sys->hwnd )
232 PostMessage( p_vout->p_sys->hwnd, WM_NULL, 0, 0);
235 vlc_thread_join( p_vout->p_sys->p_event );
236 vlc_object_destroy( p_vout->p_sys->p_event );
239 vlc_mutex_destroy( &p_vout->p_sys->lock );
243 free( p_vout->p_sys );
244 p_vout->p_sys = NULL;
248 /*****************************************************************************
249 * Manage: handle Sys events
250 *****************************************************************************
251 * This function should be called regularly by the video output thread.
252 * It returns a non null value if an error occurred.
253 *****************************************************************************/
254 static int Manage( vout_thread_t *p_vout )
256 int i_width = p_vout->p_sys->rect_dest.right -
257 p_vout->p_sys->rect_dest.left;
258 int i_height = p_vout->p_sys->rect_dest.bottom -
259 p_vout->p_sys->rect_dest.top;
260 glViewport( 0, 0, i_width, i_height );
262 /* If we do not control our window, we check for geometry changes
263 * ourselves because the parent might not send us its events. */
264 vlc_mutex_lock( &p_vout->p_sys->lock );
265 if( p_vout->p_sys->hparent && !p_vout->b_fullscreen )
270 vlc_mutex_unlock( &p_vout->p_sys->lock );
272 GetClientRect( p_vout->p_sys->hparent, &rect_parent );
273 point.x = point.y = 0;
274 ClientToScreen( p_vout->p_sys->hparent, &point );
275 OffsetRect( &rect_parent, point.x, point.y );
277 if( !EqualRect( &rect_parent, &p_vout->p_sys->rect_parent ) )
279 p_vout->p_sys->rect_parent = rect_parent;
281 /* This one is to force the update even if only
282 * the position has changed */
283 SetWindowPos( p_vout->p_sys->hwnd, 0, 1, 1,
284 rect_parent.right - rect_parent.left,
285 rect_parent.bottom - rect_parent.top, 0 );
287 SetWindowPos( p_vout->p_sys->hwnd, 0, 0, 0,
288 rect_parent.right - rect_parent.left,
289 rect_parent.bottom - rect_parent.top, 0 );
294 vlc_mutex_unlock( &p_vout->p_sys->lock );
297 /* Check for cropping / aspect changes */
298 if( p_vout->i_changes & VOUT_CROP_CHANGE ||
299 p_vout->i_changes & VOUT_ASPECT_CHANGE )
301 p_vout->i_changes &= ~VOUT_CROP_CHANGE;
302 p_vout->i_changes &= ~VOUT_ASPECT_CHANGE;
304 p_vout->fmt_out.i_x_offset = p_vout->fmt_in.i_x_offset;
305 p_vout->fmt_out.i_y_offset = p_vout->fmt_in.i_y_offset;
306 p_vout->fmt_out.i_visible_width = p_vout->fmt_in.i_visible_width;
307 p_vout->fmt_out.i_visible_height = p_vout->fmt_in.i_visible_height;
308 p_vout->fmt_out.i_aspect = p_vout->fmt_in.i_aspect;
309 p_vout->fmt_out.i_sar_num = p_vout->fmt_in.i_sar_num;
310 p_vout->fmt_out.i_sar_den = p_vout->fmt_in.i_sar_den;
311 p_vout->output.i_aspect = p_vout->fmt_in.i_aspect;
312 E_(UpdateRects)( p_vout, VLC_TRUE );
315 /* We used to call the Win32 PeekMessage function here to read the window
316 * messages. But since window can stay blocked into this function for a
317 * long time (for example when you move your window on the screen), I
318 * decided to isolate PeekMessage in another thread. */
323 if( p_vout->i_changes & VOUT_FULLSCREEN_CHANGE
324 || p_vout->p_sys->i_changes & VOUT_FULLSCREEN_CHANGE )
326 Win32ToggleFullscreen( p_vout );
328 p_vout->i_changes &= ~VOUT_FULLSCREEN_CHANGE;
329 p_vout->p_sys->i_changes &= ~VOUT_FULLSCREEN_CHANGE;
335 if( p_vout->b_fullscreen && !p_vout->p_sys->b_cursor_hidden &&
336 (mdate() - p_vout->p_sys->i_lastmoved) > 5000000 )
341 /* Hide the cursor only if it is inside our window */
342 GetCursorPos( &point );
343 hwnd = WindowFromPoint(point);
344 if( hwnd == p_vout->p_sys->hwnd || hwnd == p_vout->p_sys->hvideownd )
346 PostMessage( p_vout->p_sys->hwnd, WM_VLC_HIDE_MOUSE, 0, 0 );
350 p_vout->p_sys->i_lastmoved = mdate();
355 * "Always on top" status change
357 if( p_vout->p_sys->b_on_top_change )
360 HMENU hMenu = GetSystemMenu( p_vout->p_sys->hwnd, FALSE );
362 var_Get( p_vout, "video-on-top", &val );
364 /* Set the window on top if necessary */
365 if( val.b_bool && !( GetWindowLong( p_vout->p_sys->hwnd, GWL_EXSTYLE )
368 CheckMenuItem( hMenu, IDM_TOGGLE_ON_TOP,
369 MF_BYCOMMAND | MFS_CHECKED );
370 SetWindowPos( p_vout->p_sys->hwnd, HWND_TOPMOST, 0, 0, 0, 0,
371 SWP_NOSIZE | SWP_NOMOVE );
374 /* The window shouldn't be on top */
375 if( !val.b_bool && ( GetWindowLong( p_vout->p_sys->hwnd, GWL_EXSTYLE )
378 CheckMenuItem( hMenu, IDM_TOGGLE_ON_TOP,
379 MF_BYCOMMAND | MFS_UNCHECKED );
380 SetWindowPos( p_vout->p_sys->hwnd, HWND_NOTOPMOST, 0, 0, 0, 0,
381 SWP_NOSIZE | SWP_NOMOVE );
384 p_vout->p_sys->b_on_top_change = VLC_FALSE;
387 /* Check if the event thread is still running */
388 if( p_vout->p_sys->p_event->b_die )
390 return VLC_EGENERIC; /* exit */
396 /*****************************************************************************
397 * GLSwapBuffers: swap front/back buffers
398 *****************************************************************************/
399 static void GLSwapBuffers( vout_thread_t *p_vout )
401 SwapBuffers( p_vout->p_sys->hGLDC );
405 ** this function is only used once when the first picture is received
406 ** this function will show the video window once a picture is ready
409 static void FirstSwap( vout_thread_t *p_vout )
411 /* get initial picture buffer swapped to front buffer */
412 GLSwapBuffers( p_vout );
415 ** Video window is initially hidden, show it now since we got a
418 SetWindowPos( p_vout->p_sys->hvideownd, NULL, 0, 0, 0, 0,
426 /* use and restores proper swap function for further pictures */
427 p_vout->pf_swap = GLSwapBuffers;