events.c

来自「VLC媒体播放程序」· C语言 代码 · 共 756 行 · 第 1/2 页

        rect_window.right  = rect_window.left + p_vout->p_sys->i_window_width;
        rect_window.bottom = rect_window.top + p_vout->p_sys->i_window_height;
        AdjustWindowRect( &rect_window, WS_OVERLAPPEDWINDOW|WS_SIZEBOX, 0 );

        /* Create the window */
        p_vout->p_sys->hwnd =
            CreateWindow( "VLC DirectX",             /* name of window class */
                    VOUT_TITLE " (DirectX Output)", /* window title bar text */
                    WS_OVERLAPPEDWINDOW | WS_SIZEBOX | WS_VISIBLE |
                    WS_CLIPCHILDREN,                         /* window style */
                    CW_USEDEFAULT,                   /* default X coordinate */
                    0,                               /* default Y coordinate */
                    rect_window.right - rect_window.left,    /* window width */
                    rect_window.bottom - rect_window.top,   /* window height */
                    NULL,                                /* no parent window */
                    NULL,                          /* no menu in this window */
                    hInstance,            /* handle of this program instance */
                    (LPVOID)p_vout );            /* send p_vout to WM_CREATE */

        if( !p_vout->p_sys->hwnd )
        {
            msg_Warn( p_vout, "DirectXCreateWindow create window FAILED" );
            return VLC_EGENERIC;
        }
    }

    /* Now display the window */
    ShowWindow( p_vout->p_sys->hwnd, SW_SHOW );

    /* Create video sub-window. This sub window will always exactly match
     * the size of the video, which allows us to use crazy overlay colorkeys
     * without having them shown outside of the video area. */
    SendMessage( p_vout->p_sys->hwnd, WM_VLC_CREATE_VIDEO_WIN, 0, 0 );

    /* Append a "Always On Top" entry in the system menu */
    hMenu = GetSystemMenu( p_vout->p_sys->hwnd, FALSE );
    AppendMenu( hMenu, MF_SEPARATOR, 0, "" );
    AppendMenu( hMenu, MF_STRING | MF_UNCHECKED,
                       IDM_TOGGLE_ON_TOP, "Always on &Top" );

    return VLC_SUCCESS;
}

/*****************************************************************************
 * DirectXCloseWindow: close the window created by DirectXCreateWindow
 *****************************************************************************
 * This function returns all resources allocated by DirectXCreateWindow.
 *****************************************************************************/
static void DirectXCloseWindow( vout_thread_t *p_vout )
{
    msg_Dbg( p_vout, "DirectXCloseWindow" );

    if( p_vout->p_sys->hwnd && !p_vout->p_sys->hparent )
    {
        DestroyWindow( p_vout->p_sys->hwnd );
    }
    else if( p_vout->p_sys->hparent )
    {
        /* Get rid of the video sub-window */
        PostMessage( p_vout->p_sys->hvideownd, WM_VLC_DESTROY_VIDEO_WIN, 0, 0);

        /* We don't want our windowproc to be called anymore */
        SetWindowLong( p_vout->p_sys->hwnd,
                       GWL_WNDPROC, (LONG)p_vout->p_sys->pf_wndproc );
        SetWindowLong( p_vout->p_sys->hwnd, GWL_USERDATA, (LONG)NULL );

        /* Blam! Erase everything that might have been there. */
        InvalidateRect( p_vout->p_sys->hwnd, NULL, TRUE );
    }

    p_vout->p_sys->hwnd = NULL;

    /* We don't unregister the Window Class because it could lead to race
     * conditions and it will be done anyway by the system when the app will
     * exit */
}

/*****************************************************************************
 * DirectXUpdateRects: update clipping rectangles
 *****************************************************************************
 * This function is called when the window position or size are changed, and
 * its job is to update the source and destination RECTs used to display the
 * picture.
 *****************************************************************************/
void DirectXUpdateRects( vout_thread_t *p_vout, vlc_bool_t b_force )
{
#define rect_src p_vout->p_sys->rect_src
#define rect_src_clipped p_vout->p_sys->rect_src_clipped
#define rect_dest p_vout->p_sys->rect_dest
#define rect_dest_clipped p_vout->p_sys->rect_dest_clipped

    int i_width, i_height, i_x, i_y;

    RECT  rect;
    POINT point;

    /* Retrieve the window size */
    GetClientRect( p_vout->p_sys->hwnd, &rect );

    /* Retrieve the window position */
    point.x = point.y = 0;
    ClientToScreen( p_vout->p_sys->hwnd, &point );

    /* If nothing changed, we can return */
    if( !b_force
         && p_vout->p_sys->i_window_width == rect.right
         && p_vout->p_sys->i_window_height == rect.bottom
         && p_vout->p_sys->i_window_x == point.x
         && p_vout->p_sys->i_window_y == point.y )
    {
        return;
    }

    /* Update the window position and size */
    p_vout->p_sys->i_window_x = point.x;
    p_vout->p_sys->i_window_y = point.y;
    p_vout->p_sys->i_window_width = rect.right;
    p_vout->p_sys->i_window_height = rect.bottom;

    vout_PlacePicture( p_vout, rect.right, rect.bottom,
                       &i_x, &i_y, &i_width, &i_height );

    if( p_vout->p_sys->hvideownd )
        SetWindowPos( p_vout->p_sys->hvideownd, HWND_TOP,
                      i_x, i_y, i_width, i_height, 0 );

    /* Destination image position and dimensions */
    rect_dest.left = point.x + i_x;
    rect_dest.right = rect_dest.left + i_width;
    rect_dest.top = point.y + i_y;
    rect_dest.bottom = rect_dest.top + i_height;

    /* UpdateOverlay directdraw function doesn't automatically clip to the
     * display size so we need to do it otherwise it will fail */

    /* Clip the destination window */
    if( !IntersectRect( &rect_dest_clipped, &rect_dest,
                        &p_vout->p_sys->rect_display ) )
    {
        SetRectEmpty( &rect_src_clipped );
        return;
    }

#if 0
    msg_Dbg( p_vout, "DirectXUpdateRects image_dst_clipped coords:"
                     " %i,%i,%i,%i",
                     rect_dest_clipped.left, rect_dest_clipped.top,
                     rect_dest_clipped.right, rect_dest_clipped.bottom );
#endif

    /* the 2 following lines are to fix a bug when clicking on the desktop */
    if( (rect_dest_clipped.right - rect_dest_clipped.left)==0 ||
        (rect_dest_clipped.bottom - rect_dest_clipped.top)==0 )
    {
        SetRectEmpty( &rect_src_clipped );
        return;
    }

    /* src image dimensions */
    rect_src.left = 0;
    rect_src.top = 0;
    rect_src.right = p_vout->render.i_width;
    rect_src.bottom = p_vout->render.i_height;

    /* Clip the source image */
    rect_src_clipped.left = (rect_dest_clipped.left - rect_dest.left) *
      p_vout->render.i_width / (rect_dest.right - rect_dest.left);
    rect_src_clipped.right = p_vout->render.i_width -
      (rect_dest.right - rect_dest_clipped.right) * p_vout->render.i_width /
      (rect_dest.right - rect_dest.left);
    rect_src_clipped.top = (rect_dest_clipped.top - rect_dest.top) *
      p_vout->render.i_height / (rect_dest.bottom - rect_dest.top);
    rect_src_clipped.bottom = p_vout->render.i_height -
      (rect_dest.bottom - rect_dest_clipped.bottom) * p_vout->render.i_height /
      (rect_dest.bottom - rect_dest.top);

    /* The destination coordinates need to be relative to the current
     * directdraw primary surface (display) */
    rect_dest_clipped.left -= p_vout->p_sys->rect_display.left;
    rect_dest_clipped.right -= p_vout->p_sys->rect_display.left;
    rect_dest_clipped.top -= p_vout->p_sys->rect_display.top;
    rect_dest_clipped.bottom -= p_vout->p_sys->rect_display.top;

#if 0
    msg_Dbg( p_vout, "DirectXUpdateRects image_src_clipped"
                     " coords: %i,%i,%i,%i",
                     rect_src_clipped.left, rect_src_clipped.top,
                     rect_src_clipped.right, rect_src_clipped.bottom );
#endif

    /* Signal the change in size/position */
    p_vout->p_sys->i_changes |= DX_POSITION_CHANGE;

#undef rect_src
#undef rect_src_clipped
#undef rect_dest
#undef rect_dest_clipped
}

/*****************************************************************************
 * DirectXEventProc: This is the window event processing function.
 *****************************************************************************
 * On Windows, when you create a window you have to attach an event processing
 * function to it. The aim of this function is to manage "Queued Messages" and
 * "Nonqueued Messages".
 * Queued Messages are those picked up and retransmitted by vout_Manage
 * (using the GetMessage and DispatchMessage functions).
 * Nonqueued Messages are those that Windows will send directly to this
 * procedure (like WM_DESTROY, WM_WINDOWPOSCHANGED...)
 *****************************************************************************/
static long FAR PASCAL DirectXEventProc( HWND hwnd, UINT message,
                                         WPARAM wParam, LPARAM lParam )
{
    vout_thread_t *p_vout;

    if( message == WM_CREATE )
    {
        /* Store p_vout for future use */
        p_vout = (vout_thread_t *)((CREATESTRUCT *)lParam)->lpCreateParams;
        SetWindowLong( hwnd, GWL_USERDATA, (LONG)p_vout );
    }
    else
    {
        p_vout = (vout_thread_t *)GetWindowLong( hwnd, GWL_USERDATA );
    }

    if( !p_vout )
    {
        /* Hmmm mozilla does manage somehow to save the pointer to our
         * windowproc and still calls it after the vout has been closed. */
        return DefWindowProc(hwnd, message, wParam, lParam);
    }

    switch( message )
    {

    case WM_WINDOWPOSCHANGED:
        DirectXUpdateRects( p_vout, VLC_TRUE );
        return 0;

    /* the user wants to close the window */
    case WM_CLOSE:
    {
        playlist_t * p_playlist =
            (playlist_t *)vlc_object_find( p_vout, VLC_OBJECT_PLAYLIST,
                                           FIND_ANYWHERE );
        if( p_playlist == NULL )
        {
            return 0;
        }

        playlist_Stop( p_playlist );
        vlc_object_release( p_playlist );
        return 0;
    }

    /* the window has been closed so shut down everything now */
    case WM_DESTROY:
        msg_Dbg( p_vout, "WinProc WM_DESTROY" );
        /* just destroy the window */
        PostQuitMessage( 0 );
        return 0;

    case WM_SYSCOMMAND:
        switch (wParam)
        {
            case SC_SCREENSAVE:                     /* catch the screensaver */
            case SC_MONITORPOWER:              /* catch the monitor turn-off */
                msg_Dbg( p_vout, "WinProc WM_SYSCOMMAND" );
                return 0;                  /* this stops them from happening */
            case IDM_TOGGLE_ON_TOP:            /* toggle the "on top" status */
            {
                vlc_value_t val;
                msg_Dbg( p_vout, "WinProc WM_SYSCOMMAND: IDM_TOGGLE_ON_TOP");

                /* Get the current value... */
                if( var_Get( p_vout, "video-on-top", &val ) < 0 )
                    return 0;
                /* ...and change it */
                val.b_bool = !val.b_bool;
                var_Set( p_vout, "video-on-top", val );
                return 0;
                break;
            }
        }
        break;

    case WM_VLC_CREATE_VIDEO_WIN:
        /* Create video sub-window */
        p_vout->p_sys->hvideownd =
            CreateWindow( "STATIC", "",   /* window class and title bar text */
                    WS_CHILD | WS_VISIBLE,                   /* window style */
                    CW_USEDEFAULT, CW_USEDEFAULT,     /* default coordinates */
                    CW_USEDEFAULT, CW_USEDEFAULT,
                    hwnd,                                   /* parent window */
                    NULL, GetModuleHandle(NULL), NULL );

        if( !p_vout->p_sys->hvideownd )
        {
            msg_Warn( p_vout, "Can't create video sub-window" );
        }
        else
        {
            msg_Dbg( p_vout, "Created video sub-window" );
            SetWindowLong( p_vout->p_sys->hvideownd,
                           GWL_WNDPROC, (LONG)DirectXVideoEventProc );
        }
        break;

    default:
        //msg_Dbg( p_vout, "WinProc WM Default %i", message );
        break;
    }

    return DefWindowProc(hwnd, message, wParam, lParam);
}
static long FAR PASCAL DirectXVideoEventProc( HWND hwnd, UINT message,
                                              WPARAM wParam, LPARAM lParam )
{
    switch( message )
    {
    case WM_VLC_DESTROY_VIDEO_WIN:
        /* Destroy video sub-window */
        DestroyWindow( hwnd );
        break;
    }

    return DefWindowProc(hwnd, message, wParam, lParam);
}

static struct
{
    int i_dxkey;
    int i_vlckey;

} dxkeys_to_vlckeys[] =
{
    { VK_F1, KEY_F1 }, { VK_F2, KEY_F2 }, { VK_F3, KEY_F3 }, { VK_F4, KEY_F4 },
    { VK_F5, KEY_F5 }, { VK_F6, KEY_F6 }, { VK_F7, KEY_F7 }, { VK_F8, KEY_F8 },
    { VK_F9, KEY_F9 }, { VK_F10, KEY_F10 }, { VK_F11, KEY_F11 },
    { VK_F12, KEY_F12 },

    { VK_RETURN, KEY_ENTER },
    { VK_SPACE, KEY_SPACE },
    { VK_ESCAPE, KEY_ESC },

    { VK_LEFT, KEY_LEFT },
    { VK_RIGHT, KEY_RIGHT },
    { VK_UP, KEY_UP },
    { VK_DOWN, KEY_DOWN },

    { VK_HOME, KEY_HOME },
    { VK_END, KEY_END },
    { VK_PRIOR, KEY_PAGEUP },
    { VK_NEXT, KEY_PAGEDOWN },

    { VK_CONTROL, 0 },
    { VK_SHIFT, 0 },
    { VK_MENU, 0 },

    { 0, 0 }
};

static int DirectXConvertKey( int i_key )
{
    int i;

    for( i = 0; dxkeys_to_vlckeys[i].i_dxkey != 0; i++ )
    {
        if( dxkeys_to_vlckeys[i].i_dxkey == i_key )
        {
            return dxkeys_to_vlckeys[i].i_vlckey;
        }
    }

    return 0;
}