* modules/audio_output/alsa.c: the aout-device obj var wasn't destroyed properly...
[vlc.git] / modules / video_output / directx / events.c
1 /*****************************************************************************
2  * events.c: Windows DirectX video output events handler
3  *****************************************************************************
4  * Copyright (C) 2001 VideoLAN
5  * $Id: events.c,v 1.16 2003/05/26 19:06:47 gbazin Exp $
6  *
7  * Authors: Gildas Bazin <gbazin@netcourrier.com>
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., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
22  *****************************************************************************/
23
24
25 /*****************************************************************************
26  * Preamble: This file contains the functions related to the creation of
27  *             a window and the handling of its messages (events).
28  *****************************************************************************/
29 #include <errno.h>                                                 /* ENOMEM */
30 #include <stdlib.h>                                                /* free() */
31 #include <string.h>                                            /* strerror() */
32
33 #include <vlc/vlc.h>
34 #include <vlc/intf.h>
35 #include <vlc/input.h>
36 #include <vlc/vout.h>
37
38 #include <windows.h>
39 #include <windowsx.h>
40 #include <shellapi.h>
41
42 #include <ddraw.h>
43
44 #include "vout.h"
45
46 /*****************************************************************************
47  * Local prototypes.
48  *****************************************************************************/
49 static int  DirectXCreateWindow( vout_thread_t *p_vout );
50 static void DirectXCloseWindow ( vout_thread_t *p_vout );
51 static long FAR PASCAL DirectXEventProc ( HWND hwnd, UINT message,
52                                           WPARAM wParam, LPARAM lParam );
53
54 /*****************************************************************************
55  * DirectXEventThread: Create video window & handle its messages
56  *****************************************************************************
57  * This function creates a video window and then enters an infinite loop
58  * that handles the messages sent to that window.
59  * The main goal of this thread is to isolate the Win32 PeekMessage function
60  * because this one can block for a long time.
61  *****************************************************************************/
62 void DirectXEventThread( event_thread_t *p_event )
63 {
64     MSG msg;
65     POINT old_mouse_pos = {0,0};
66     vlc_value_t val;
67     int i_width, i_height, i_x, i_y;
68
69     /* Initialisation */
70
71     /* Create a window for the video */
72     /* Creating a window under Windows also initializes the thread's event
73      * message queue */
74     if( DirectXCreateWindow( p_event->p_vout ) )
75     {
76         msg_Err( p_event, "out of memory" );
77         p_event->b_dead = VLC_TRUE;
78     }
79
80     /* signal the creation of the window */
81     vlc_thread_ready( p_event );
82
83     /* Main loop */
84     /* GetMessage will sleep if there's no message in the queue */
85     while( !p_event->b_die
86            && GetMessage( &msg, p_event->p_vout->p_sys->hwnd, 0, 0 ) )
87     {
88         /* Check if we are asked to exit */
89         if( p_event->b_die )
90             break;
91
92         switch( msg.message )
93         {
94
95         case WM_NCMOUSEMOVE:
96         case WM_MOUSEMOVE:
97             vout_PlacePicture( p_event->p_vout,
98                                p_event->p_vout->p_sys->i_window_width,
99                                p_event->p_vout->p_sys->i_window_height,
100                                &i_x, &i_y, &i_width, &i_height );
101
102             val.i_int = ( GET_X_LPARAM(msg.lParam) - i_x )
103                          * p_event->p_vout->render.i_width / i_width;
104             var_Set( p_event->p_vout, "mouse-x", val );
105             val.i_int = ( GET_Y_LPARAM(msg.lParam) - i_y )
106                          * p_event->p_vout->render.i_height / i_height;
107             var_Set( p_event->p_vout, "mouse-y", val );
108
109             val.b_bool = VLC_TRUE;
110             var_Set( p_event->p_vout, "mouse-moved", val );
111
112             if( (abs(GET_X_LPARAM(msg.lParam) - old_mouse_pos.x) > 2 ||
113                 (abs(GET_Y_LPARAM(msg.lParam) - old_mouse_pos.y)) > 2 ) )
114             {
115                 GetCursorPos( &old_mouse_pos );
116                 p_event->p_vout->p_sys->i_lastmoved = mdate();
117
118                 if( p_event->p_vout->p_sys->b_cursor_hidden )
119                 {
120                     p_event->p_vout->p_sys->b_cursor_hidden = 0;
121                     ShowCursor( TRUE );
122                 }
123             }
124             break;
125
126         case WM_VLC_HIDE_MOUSE:
127             GetCursorPos( &old_mouse_pos );
128             ShowCursor( FALSE );
129             break;
130
131         case WM_LBUTTONDOWN:
132             var_Get( p_event->p_vout, "mouse-button-down", &val );
133             val.i_int |= 1;
134             var_Set( p_event->p_vout, "mouse-button-down", val );
135             break;
136
137         case WM_LBUTTONUP:
138             var_Get( p_event->p_vout, "mouse-button-down", &val );
139             val.i_int &= ~1;
140             var_Set( p_event->p_vout, "mouse-button-down", val );
141
142             val.b_bool = VLC_TRUE;
143             var_Set( p_event->p_vout, "mouse-clicked", val );
144             break;
145
146         case WM_LBUTTONDBLCLK:
147             p_event->p_vout->p_sys->i_changes |= VOUT_FULLSCREEN_CHANGE;
148             break;
149
150         case WM_MBUTTONDOWN:
151             var_Get( p_event->p_vout, "mouse-button-down", &val );
152             val.i_int |= 2;
153             var_Set( p_event->p_vout, "mouse-button-down", val );
154             break;
155
156         case WM_MBUTTONUP:
157             var_Get( p_event->p_vout, "mouse-button-down", &val );
158             val.i_int &= ~2;
159             var_Set( p_event->p_vout, "mouse-button-down", val );
160             break;
161
162         case WM_RBUTTONDOWN:
163             var_Get( p_event->p_vout, "mouse-button-down", &val );
164             val.i_int |= 4;
165             var_Set( p_event->p_vout, "mouse-button-down", val );
166             break;
167
168         case WM_RBUTTONUP:
169             var_Get( p_event->p_vout, "mouse-button-down", &val );
170             val.i_int &= ~4;
171             var_Set( p_event->p_vout, "mouse-button-down", val );
172             {
173                 playlist_t *p_playlist =
174                     vlc_object_find( p_intf, VLC_OBJECT_PLAYLIST,
175                                      FIND_ANYWHERE );
176                 if( p_playlist != NULL )
177                 {
178                     vlc_value_t val;
179                     var_Set( p_playlist, "intf-popupmenu", val );
180                     vlc_object_release( p_playlist );
181                 }
182             }
183             break;
184
185         case WM_KEYDOWN:
186             /* the key events are first processed here. The next
187              * message processed by this main message loop will be the
188              * char translation of the key event */
189             msg_Dbg( p_event, "WM_KEYDOWN" );
190             switch( msg.wParam )
191             {
192             case VK_ESCAPE:
193                 if( p_event->p_vout->b_fullscreen )
194                 {
195                     p_event->p_vout->i_changes |= VOUT_FULLSCREEN_CHANGE;
196                 }
197                 else
198                 {
199                     /* exit application */
200                     p_event->p_vout->p_vlc->b_die = VLC_TRUE;
201                 }
202                 break;
203
204             case VK_MENU:
205                 {
206                     playlist_t *p_playlist =
207                         vlc_object_find( p_intf, VLC_OBJECT_PLAYLIST,
208                                          FIND_ANYWHERE );
209                     if( p_playlist != NULL )
210                     {
211                         vlc_value_t val;
212                         var_Set( p_playlist, "intf-popupmenu", val );
213                         vlc_object_release( p_playlist );
214                     }
215                 }
216                 break;
217
218             case VK_LEFT:
219                 input_Seek( p_event->p_vout, -5,
220                             INPUT_SEEK_SECONDS | INPUT_SEEK_CUR );
221                 break;
222             case VK_RIGHT:
223                 input_Seek( p_event->p_vout, 5,
224                             INPUT_SEEK_SECONDS | INPUT_SEEK_CUR );
225                 break;
226             case VK_UP:
227                 input_Seek( p_event->p_vout, 60,
228                             INPUT_SEEK_SECONDS | INPUT_SEEK_CUR );
229                 break;
230             case VK_DOWN:
231                 input_Seek( p_event->p_vout, -60,
232                             INPUT_SEEK_SECONDS | INPUT_SEEK_CUR );
233                 break;
234             case VK_HOME:
235                 input_Seek( p_event->p_vout, 0,
236                             INPUT_SEEK_BYTES | INPUT_SEEK_SET );
237                 break;
238             case VK_END:
239                 input_Seek( p_event->p_vout, 0,
240                             INPUT_SEEK_BYTES | INPUT_SEEK_END );
241                 break;
242             case VK_PRIOR:
243                 input_Seek( p_event->p_vout, 900,
244                             INPUT_SEEK_SECONDS | INPUT_SEEK_CUR );
245                 break;
246             case VK_NEXT:
247                 input_Seek( p_event->p_vout, -900,
248                             INPUT_SEEK_SECONDS | INPUT_SEEK_CUR );
249                 break;
250             case VK_SPACE:
251                 input_SetStatus( p_event->p_vout, INPUT_STATUS_PAUSE );
252                 break;
253             }
254             TranslateMessage(&msg);
255             break;
256
257         case WM_CHAR:
258             switch( msg.wParam )
259             {
260             case 'q':
261             case 'Q':
262                 /* exit application */
263                 p_event->p_vlc->b_die = VLC_TRUE;
264                 break;
265
266             case 'f':                            /* switch to fullscreen */
267             case 'F':
268                 p_event->p_vout->p_sys->i_changes |= VOUT_FULLSCREEN_CHANGE;
269                 break;
270
271             default:
272                 break;
273             }
274
275         default:
276             /* Messages we don't handle directly are dispatched to the
277              * window procedure */
278             TranslateMessage(&msg);
279             DispatchMessage(&msg);
280             break;
281
282         } /* End Switch */
283
284     } /* End Main loop */
285
286     if( msg.message == WM_QUIT )
287     {
288         msg_Warn( p_event, "WM_QUIT... should not happen!!" );
289         p_event->p_vout->p_sys->hwnd = NULL; /* Window already destroyed */
290     }
291
292     msg_Dbg( p_event, "DirectXEventThread terminating" );
293
294     /* clear the changes formerly signaled */
295     p_event->p_vout->p_sys->i_changes = 0;
296
297     DirectXCloseWindow( p_event->p_vout );
298 }
299
300
301 /* following functions are local */
302
303 /*****************************************************************************
304  * DirectXCreateWindow: create a window for the video.
305  *****************************************************************************
306  * Before creating a direct draw surface, we need to create a window in which
307  * the video will be displayed. This window will also allow us to capture the
308  * events.
309  *****************************************************************************/
310 static int DirectXCreateWindow( vout_thread_t *p_vout )
311 {
312     HINSTANCE  hInstance;
313     COLORREF   colorkey;
314     HDC        hdc;
315     HMENU      hMenu;
316     RECT       rect_window;
317
318     vlc_value_t val;
319
320     msg_Dbg( p_vout, "DirectXCreateWindow" );
321
322     /* Get this module's instance */
323     hInstance = GetModuleHandle(NULL);
324
325     /* Create a BRUSH that will be used by Windows to paint the window
326      * background.
327      * This window background is important for us as it will be used by the
328      * graphics card to display the overlay.
329      * This is why we carefully choose the color for this background, the goal
330      * being to choose a color which isn't complete black but nearly. We
331      * obviously don't want to use black as a colorkey for the overlay because
332      * black is one of the most used color and thus would give us undesirable
333      * effects */
334     /* the first step is to find the colorkey we want to use. The difficulty
335      * comes from the potential dithering (depends on the display depth)
336      * because we need to know the real RGB value of the chosen colorkey */
337     hdc = GetDC( NULL );
338     for( colorkey = 0x0a; colorkey < 0xff /* all shades of red */; colorkey++ )
339     {
340         if( colorkey == GetNearestColor( hdc, colorkey ) )
341         {
342             break;
343         }
344     }
345     msg_Dbg( p_vout, "background color: %i", colorkey );
346
347     /* Create the actual brush */
348     p_vout->p_sys->hbrush = CreateSolidBrush(colorkey);
349     p_vout->p_sys->i_rgb_colorkey = (int)colorkey;
350
351     /* Get the current size of the display and its colour depth */
352     p_vout->p_sys->rect_display.right = GetDeviceCaps( hdc, HORZRES );
353     p_vout->p_sys->rect_display.bottom = GetDeviceCaps( hdc, VERTRES );
354     p_vout->p_sys->i_display_depth = GetDeviceCaps( hdc, BITSPIXEL );
355     msg_Dbg( p_vout, "screen dimensions %ix%i colour depth %i",
356                       p_vout->p_sys->rect_display.right,
357                       p_vout->p_sys->rect_display.bottom,
358                       p_vout->p_sys->i_display_depth );
359
360     ReleaseDC( NULL, hdc );
361
362     /* If an external window was specified, we'll draw in it. */
363     var_Get( p_vout->p_vlc, "drawable", &val );
364     p_vout->p_sys->hparent = p_vout->p_sys->hwnd =
365              val.i_int ?  (void*)(ptrdiff_t) val.i_int : NULL;
366
367     if( p_vout->p_sys->hparent )
368     {
369         msg_Dbg( p_vout, "using external window %p\n", p_vout->p_sys->hwnd );
370
371         /* Set stuff in the window that we can not put directly in
372          * a class (see below). */
373         SetClassLong( p_vout->p_sys->hwnd,
374                       GCL_STYLE, CS_DBLCLKS );
375         SetClassLong( p_vout->p_sys->hwnd,
376                       GCL_HBRBACKGROUND, (LONG)p_vout->p_sys->hbrush );
377         SetClassLong( p_vout->p_sys->hwnd,
378                       GCL_HCURSOR, (LONG)LoadCursor(NULL, IDC_ARROW) );
379         /* Store a p_vout pointer into the window local storage (for later
380          * use in DirectXEventProc). */
381         SetWindowLong( p_vout->p_sys->hwnd, GWL_USERDATA, (LONG)p_vout );
382
383         p_vout->p_sys->pf_wndproc =
384                (WNDPROC)SetWindowLong( p_vout->p_sys->hwnd,
385                                        GWL_WNDPROC, (LONG)DirectXEventProc );
386
387         /* Blam! Erase everything that might have been there. */
388         RedrawWindow( p_vout->p_sys->hwnd, NULL, NULL,
389                       RDW_INVALIDATE | RDW_ERASE );
390     }
391     else
392     {
393         WNDCLASSEX wc;                            /* window class components */
394         HICON      vlc_icon = NULL;
395         char       vlc_path[MAX_PATH+1];
396
397         /* Get the Icon from the main app */
398         vlc_icon = NULL;
399         if( GetModuleFileName( NULL, vlc_path, MAX_PATH ) )
400         {
401             vlc_icon = ExtractIcon( hInstance, vlc_path, 0 );
402         }
403
404         /* Fill in the window class structure */
405         wc.cbSize        = sizeof(WNDCLASSEX);
406         wc.style         = CS_DBLCLKS;                   /* style: dbl click */
407         wc.lpfnWndProc   = (WNDPROC)DirectXEventProc;       /* event handler */
408         wc.cbClsExtra    = 0;                         /* no extra class data */
409         wc.cbWndExtra    = 0;                        /* no extra window data */
410         wc.hInstance     = hInstance;                            /* instance */
411         wc.hIcon         = vlc_icon;                /* load the vlc big icon */
412         wc.hCursor       = LoadCursor(NULL, IDC_ARROW);    /* default cursor */
413         wc.hbrBackground = p_vout->p_sys->hbrush;        /* background color */
414         wc.lpszMenuName  = NULL;                                  /* no menu */
415         wc.lpszClassName = "VLC DirectX";             /* use a special class */
416         wc.hIconSm       = vlc_icon;              /* load the vlc small icon */
417
418         /* Register the window class */
419         if( !RegisterClassEx(&wc) )
420         {
421             WNDCLASS wndclass;
422
423             /* Free window background brush */
424             if( p_vout->p_sys->hbrush )
425             {
426                 DeleteObject( p_vout->p_sys->hbrush );
427                 p_vout->p_sys->hbrush = NULL;
428             }
429
430             if( vlc_icon )
431             {
432                 DestroyIcon( vlc_icon );
433             }
434
435             /* Check why it failed. If it's because one already exists
436              * then fine, otherwise return with an error. */
437             if( !GetClassInfo( hInstance, "VLC DirectX", &wndclass ) )
438             {
439                 msg_Err( p_vout, "DirectXCreateWindow RegisterClass FAILED" );
440                 return VLC_EGENERIC;
441             }
442         }
443
444         /* When you create a window you give the dimensions you wish it to
445          * have. Unfortunatly these dimensions will include the borders and
446          * titlebar. We use the following function to find out the size of
447          * the window corresponding to the useable surface we want */
448         rect_window.top    = 10;
449         rect_window.left   = 10;
450         rect_window.right  = rect_window.left + p_vout->p_sys->i_window_width;
451         rect_window.bottom = rect_window.top + p_vout->p_sys->i_window_height;
452         AdjustWindowRect( &rect_window, WS_OVERLAPPEDWINDOW|WS_SIZEBOX, 0 );
453
454         /* Create the window */
455         p_vout->p_sys->hwnd =
456             CreateWindow( "VLC DirectX",             /* name of window class */
457                     VOUT_TITLE " (DirectX Output)", /* window title bar text */
458                     WS_OVERLAPPEDWINDOW | WS_SIZEBOX,        /* window style */
459                     CW_USEDEFAULT,                   /* default X coordinate */
460                     0,                               /* default Y coordinate */
461                     rect_window.right - rect_window.left,    /* window width */
462                     rect_window.bottom - rect_window.top,   /* window height */
463                     NULL,                                /* no parent window */
464                     NULL,                          /* no menu in this window */
465                     hInstance,            /* handle of this program instance */
466                     (LPVOID)p_vout );            /* send p_vout to WM_CREATE */
467
468         if( !p_vout->p_sys->hwnd )
469         {
470             msg_Warn( p_vout, "DirectXCreateWindow create window FAILED" );
471             return VLC_EGENERIC;
472         }
473     }
474
475     /* Append a "Always On Top" entry in the system menu */
476     hMenu = GetSystemMenu( p_vout->p_sys->hwnd, FALSE );
477     AppendMenu( hMenu, MF_SEPARATOR, 0, "" );
478     AppendMenu( hMenu, MF_STRING | MF_UNCHECKED,
479                        IDM_TOGGLE_ON_TOP, "Always on &Top" );
480
481     /* Now display the window */
482     ShowWindow( p_vout->p_sys->hwnd, SW_SHOW );
483
484     return VLC_SUCCESS;
485 }
486
487 /*****************************************************************************
488  * DirectXCloseWindow: close the window created by DirectXCreateWindow
489  *****************************************************************************
490  * This function returns all resources allocated by DirectXCreateWindow.
491  *****************************************************************************/
492 static void DirectXCloseWindow( vout_thread_t *p_vout )
493 {
494     msg_Dbg( p_vout, "DirectXCloseWindow" );
495
496     if( p_vout->p_sys->hwnd && !p_vout->p_sys->hparent )
497     {
498         DestroyWindow( p_vout->p_sys->hwnd );
499     }
500
501     p_vout->p_sys->hwnd = NULL;
502
503     /* We don't unregister the Window Class because it could lead to race
504      * conditions and it will be done anyway by the system when the app will
505      * exit */
506 }
507
508 /*****************************************************************************
509  * DirectXUpdateRects: update clipping rectangles
510  *****************************************************************************
511  * This function is called when the window position or size are changed, and
512  * its job is to update the source and destination RECTs used to display the
513  * picture.
514  *****************************************************************************/
515 void DirectXUpdateRects( vout_thread_t *p_vout, vlc_bool_t b_force )
516 {
517 #define rect_src p_vout->p_sys->rect_src
518 #define rect_src_clipped p_vout->p_sys->rect_src_clipped
519 #define rect_dest p_vout->p_sys->rect_dest
520 #define rect_dest_clipped p_vout->p_sys->rect_dest_clipped
521
522     int i_width, i_height, i_x, i_y;
523
524     RECT  rect;
525     POINT point;
526
527     /* Retrieve the window size */
528     GetClientRect( p_vout->p_sys->hwnd, &rect );
529
530     /* Retrieve the window position */
531     point.x = point.y = 0;
532     ClientToScreen( p_vout->p_sys->hwnd, &point );
533
534     /* If nothing changed, we can return */
535     if( !b_force
536          && p_vout->p_sys->i_window_width == rect.right
537          && p_vout->p_sys->i_window_height == rect.bottom
538          && p_vout->p_sys->i_window_x == point.x
539          && p_vout->p_sys->i_window_y == point.y )
540     {
541         return;
542     }
543
544     /* Update the window position and size */
545     p_vout->p_sys->i_window_x = point.x;
546     p_vout->p_sys->i_window_y = point.y;
547     p_vout->p_sys->i_window_width = rect.right;
548     p_vout->p_sys->i_window_height = rect.bottom;
549
550     vout_PlacePicture( p_vout, rect.right, rect.bottom,
551                        &i_x, &i_y, &i_width, &i_height );
552
553     /* Destination image position and dimensions */
554     rect_dest.left = point.x + i_x;
555     rect_dest.right = rect_dest.left + i_width;
556     rect_dest.top = point.y + i_y;
557     rect_dest.bottom = rect_dest.top + i_height;
558
559
560     /* UpdateOverlay directdraw function doesn't automatically clip to the
561      * display size so we need to do it otherwise it will fail */
562
563     /* Clip the destination window */
564     IntersectRect( &rect_dest_clipped,
565                    &rect_dest,
566                    &p_vout->p_sys->rect_display );
567
568 #if 0
569     msg_Dbg( p_vout, "DirectXUpdateRects image_dst_clipped coords:"
570                      " %i,%i,%i,%i",
571                      rect_dest_clipped.left, rect_dest_clipped.top,
572                      rect_dest_clipped.right, rect_dest_clipped.bottom );
573 #endif
574
575     /* the 2 following lines are to fix a bug when clicking on the desktop */
576     if( (rect_dest_clipped.right - rect_dest_clipped.left)==0 ||
577         (rect_dest_clipped.bottom - rect_dest_clipped.top)==0 )
578     {
579         SetRectEmpty( &rect_src_clipped );
580         return;
581     }
582
583     /* src image dimensions */
584     rect_src.left = 0;
585     rect_src.top = 0;
586     rect_src.right = p_vout->render.i_width;
587     rect_src.bottom = p_vout->render.i_height;
588
589     /* Clip the source image */
590     rect_src_clipped.left = (rect_dest_clipped.left - rect_dest.left) *
591       p_vout->render.i_width / (rect_dest.right - rect_dest.left);
592     rect_src_clipped.right = p_vout->render.i_width -
593       (rect_dest.right - rect_dest_clipped.right) * p_vout->render.i_width /
594       (rect_dest.right - rect_dest.left);
595     rect_src_clipped.top = (rect_dest_clipped.top - rect_dest.top) *
596       p_vout->render.i_height / (rect_dest.bottom - rect_dest.top);
597     rect_src_clipped.bottom = p_vout->render.i_height -
598       (rect_dest.bottom - rect_dest_clipped.bottom) * p_vout->render.i_height /
599       (rect_dest.bottom - rect_dest.top);
600
601 #if 0
602     msg_Dbg( p_vout, "DirectXUpdateRects image_src_clipped"
603                      " coords: %i,%i,%i,%i",
604                      rect_src_clipped.left, rect_src_clipped.top,
605                      rect_src_clipped.right, rect_src_clipped.bottom );
606 #endif
607
608     /* Signal the size change */
609     if( !p_vout->p_sys->p_event->b_die )
610     {
611         if( p_vout->p_sys->b_using_overlay )
612         {
613             DirectXUpdateOverlay( p_vout );
614         }
615         else
616         {
617             p_vout->p_sys->i_changes |= VOUT_SIZE_CHANGE;
618         }
619     }
620
621 #undef rect_src
622 #undef rect_src_clipped
623 #undef rect_dest
624 #undef rect_dest_clipped
625 }
626
627 /*****************************************************************************
628  * DirectXEventProc: This is the window event processing function.
629  *****************************************************************************
630  * On Windows, when you create a window you have to attach an event processing
631  * function to it. The aim of this function is to manage "Queued Messages" and
632  * "Nonqueued Messages".
633  * Queued Messages are those picked up and retransmitted by vout_Manage
634  * (using the GetMessage and DispatchMessage functions).
635  * Nonqueued Messages are those that Windows will send directly to this
636  * procedure (like WM_DESTROY, WM_WINDOWPOSCHANGED...)
637  *****************************************************************************/
638 static long FAR PASCAL DirectXEventProc( HWND hwnd, UINT message,
639                                          WPARAM wParam, LPARAM lParam )
640 {
641     vout_thread_t *p_vout;
642
643     if( message == WM_CREATE )
644     {
645         /* Store p_vout for future use */
646         p_vout = (vout_thread_t *)((CREATESTRUCT *)lParam)->lpCreateParams;
647         SetWindowLong( hwnd, GWL_USERDATA, (LONG)p_vout );
648     }
649     else
650     {
651         p_vout = (vout_thread_t *)GetWindowLong( hwnd, GWL_USERDATA );
652     }
653
654     switch( message )
655     {
656
657     case WM_WINDOWPOSCHANGED:
658         DirectXUpdateRects( p_vout, VLC_TRUE );
659         return 0;
660
661     /* the user wants to close the window */
662     case WM_CLOSE:
663         msg_Dbg( p_vout, "WinProc WM_CLOSE" );
664         /* exit application */
665         p_vout->p_vlc->b_die = VLC_TRUE;
666         return 0;
667
668     /* the window has been closed so shut down everything now */
669     case WM_DESTROY:
670         msg_Dbg( p_vout, "WinProc WM_DESTROY" );
671         /* just destroy the window */
672         PostQuitMessage( 0 );
673         return 0;
674
675     case WM_SYSCOMMAND:
676         switch (wParam)
677         {
678             case SC_SCREENSAVE:                     /* catch the screensaver */
679             case SC_MONITORPOWER:              /* catch the monitor turn-off */
680                 msg_Dbg( p_vout, "WinProc WM_SYSCOMMAND" );
681                 return 0;                  /* this stops them from happening */
682             case IDM_TOGGLE_ON_TOP:            /* toggle the "on top" status */
683             {
684                 vlc_value_t val;
685                 msg_Dbg( p_vout, "WinProc WM_SYSCOMMAND: IDM_TOGGLE_ON_TOP");
686
687                 /* Get the current value... */
688                 if( var_Get( p_vout, "directx-on-top", &val ) < 0 )
689                     return 0;
690                 /* ...and change it */
691                 val.b_bool = !val.b_bool;
692                 var_Set( p_vout, "directx-on-top", val );
693                 return 0;
694                 break;
695             }
696         }
697         break;
698
699     case WM_ERASEBKGND:
700         if( !p_vout->p_sys->b_using_overlay )
701         {
702             /* We want to eliminate unnecessary background redraws which create
703              * an annoying flickering */
704             int i_width, i_height, i_x, i_y;
705             RECT rect_temp;
706             GetClipBox( (HDC)wParam, &rect_temp );
707 #if 0
708             msg_Dbg( p_vout, "WinProc WM_ERASEBKGND %i,%i,%i,%i",
709                           rect_temp.left, rect_temp.top,
710                           rect_temp.right, rect_temp.bottom );
711 #endif
712             vout_PlacePicture( p_vout, p_vout->p_sys->i_window_width,
713                                p_vout->p_sys->i_window_height,
714                                &i_x, &i_y, &i_width, &i_height );
715             ExcludeClipRect( (HDC)wParam, i_x, i_y,
716                              i_x + i_width, i_y + i_height );
717         }
718         break;
719
720     default:
721         //msg_Dbg( p_vout, "WinProc WM Default %i", message );
722         break;
723     }
724
725     return DefWindowProc(hwnd, message, wParam, lParam);
726 }
727