events.c

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/*****************************************************************************
 * events.c: Windows DirectX video output events handler
 *****************************************************************************
 * Copyright (C) 2001-2004 VideoLAN
 * $Id: events.c,v 1.38 2004/02/26 13:58:23 gbazin Exp $
 *
 * Authors: Gildas Bazin <[e-mail]>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
 *****************************************************************************/


/*****************************************************************************
 * Preamble: This file contains the functions related to the creation of
 *             a window and the handling of its messages (events).
 *****************************************************************************/
#include <errno.h>                                                 /* ENOMEM */
#include <stdlib.h>                                                /* free() */
#include <ctype.h>                                              /* tolower() */
#include <string.h>                                            /* strerror() */

#include <vlc/vlc.h>
#include <vlc/intf.h>
#include <vlc/input.h>
#include <vlc/vout.h>

#include <windows.h>
#include <windowsx.h>
#include <shellapi.h>

#include <ddraw.h>

#include "vlc_keys.h"
#include "vout.h"

/*****************************************************************************
 * Local prototypes.
 *****************************************************************************/
static int  DirectXCreateWindow( vout_thread_t *p_vout );
static void DirectXCloseWindow ( vout_thread_t *p_vout );
static long FAR PASCAL DirectXEventProc( HWND, UINT, WPARAM, LPARAM );
static long FAR PASCAL DirectXVideoEventProc( HWND, UINT, WPARAM, LPARAM );

static void DirectXPopupMenu( event_thread_t *p_event, vlc_bool_t b_open )
{
    playlist_t *p_playlist =
        vlc_object_find( p_event, VLC_OBJECT_PLAYLIST, FIND_ANYWHERE );
    if( p_playlist != NULL )
    {
        vlc_value_t val;
        val.b_bool = b_open;
        var_Set( p_playlist, "intf-popupmenu", val );
        vlc_object_release( p_playlist );
    }
}

static int DirectXConvertKey( int i_key );

/*****************************************************************************
 * DirectXEventThread: Create video window & handle its messages
 *****************************************************************************
 * This function creates a video window and then enters an infinite loop
 * that handles the messages sent to that window.
 * The main goal of this thread is to isolate the Win32 PeekMessage function
 * because this one can block for a long time.
 *****************************************************************************/
void DirectXEventThread( event_thread_t *p_event )
{
    MSG msg;
    POINT old_mouse_pos = {0,0};
    vlc_value_t val;
    int i_width, i_height, i_x, i_y;

    /* Initialisation */

    /* Create a window for the video */
    /* Creating a window under Windows also initializes the thread's event
     * message queue */
    if( DirectXCreateWindow( p_event->p_vout ) )
    {
        msg_Err( p_event, "out of memory" );
        p_event->b_dead = VLC_TRUE;
    }

    /* Signal the creation of the window */
    vlc_thread_ready( p_event );

    /* Main loop */
    /* GetMessage will sleep if there's no message in the queue */
    while( !p_event->b_die && ( p_event->p_vout->p_sys->hparent ||
           GetMessage( &msg, p_event->p_vout->p_sys->hwnd, 0, 0 ) ) )
    {
        /* Check if we are asked to exit */
        if( p_event->b_die )
            break;

        if( p_event->p_vout->p_sys->hparent )
        {
            /* Parent window was created in another thread so we can't
             * access the window messages. */
            msleep( INTF_IDLE_SLEEP );
            continue;
        }

        switch( msg.message )
        {

        case WM_MOUSEMOVE:
            vout_PlacePicture( p_event->p_vout,
                               p_event->p_vout->p_sys->i_window_width,
                               p_event->p_vout->p_sys->i_window_height,
                               &i_x, &i_y, &i_width, &i_height );

            if( msg.hwnd != p_event->p_vout->p_sys->hwnd )
            {
                /* Child window */
                i_x = i_y = 0;
            }

            val.i_int = ( GET_X_LPARAM(msg.lParam) - i_x )
                         * p_event->p_vout->render.i_width / i_width;
            var_Set( p_event->p_vout, "mouse-x", val );
            val.i_int = ( GET_Y_LPARAM(msg.lParam) - i_y )
                         * p_event->p_vout->render.i_height / i_height;
            var_Set( p_event->p_vout, "mouse-y", val );

            val.b_bool = VLC_TRUE;
            var_Set( p_event->p_vout, "mouse-moved", val );

        case WM_NCMOUSEMOVE:
            if( (abs(GET_X_LPARAM(msg.lParam) - old_mouse_pos.x) > 2 ||
                (abs(GET_Y_LPARAM(msg.lParam) - old_mouse_pos.y)) > 2 ) )
            {
                GetCursorPos( &old_mouse_pos );
                p_event->p_vout->p_sys->i_lastmoved = mdate();

                if( p_event->p_vout->p_sys->b_cursor_hidden )
                {
                    p_event->p_vout->p_sys->b_cursor_hidden = 0;
                    ShowCursor( TRUE );
                }
            }
            break;

        case WM_VLC_HIDE_MOUSE:
            GetCursorPos( &old_mouse_pos );
            ShowCursor( FALSE );
            break;

        case WM_LBUTTONDOWN:
            var_Get( p_event->p_vout, "mouse-button-down", &val );
            val.i_int |= 1;
            var_Set( p_event->p_vout, "mouse-button-down", val );
            DirectXPopupMenu( p_event, VLC_FALSE );
            break;

        case WM_LBUTTONUP:
            var_Get( p_event->p_vout, "mouse-button-down", &val );
            val.i_int &= ~1;
            var_Set( p_event->p_vout, "mouse-button-down", val );

            val.b_bool = VLC_TRUE;
            var_Set( p_event->p_vout, "mouse-clicked", val );
            break;

        case WM_LBUTTONDBLCLK:
            p_event->p_vout->p_sys->i_changes |= VOUT_FULLSCREEN_CHANGE;
            break;

        case WM_MBUTTONDOWN:
            var_Get( p_event->p_vout, "mouse-button-down", &val );
            val.i_int |= 2;
            var_Set( p_event->p_vout, "mouse-button-down", val );
            DirectXPopupMenu( p_event, VLC_FALSE );
            break;

        case WM_MBUTTONUP:
            var_Get( p_event->p_vout, "mouse-button-down", &val );
            val.i_int &= ~2;
            var_Set( p_event->p_vout, "mouse-button-down", val );
            break;

        case WM_RBUTTONDOWN:
            var_Get( p_event->p_vout, "mouse-button-down", &val );
            val.i_int |= 4;
            var_Set( p_event->p_vout, "mouse-button-down", val );
            DirectXPopupMenu( p_event, VLC_FALSE );
            break;

        case WM_RBUTTONUP:
            var_Get( p_event->p_vout, "mouse-button-down", &val );
            val.i_int &= ~4;
            var_Set( p_event->p_vout, "mouse-button-down", val );
            DirectXPopupMenu( p_event, VLC_TRUE );
            break;

        case WM_KEYDOWN:
        case WM_SYSKEYDOWN:
            /* The key events are first processed here and not translated
             * into WM_CHAR events because we need to know the status of the
             * modifier keys. */
            val.i_int = DirectXConvertKey( msg.wParam );
            if( !val.i_int )
            {
                /* This appears to be a "normal" (ascii) key */
                val.i_int = tolower( MapVirtualKey( msg.wParam, 2 ) );
            }

            if( val.i_int )
            {
                if( GetKeyState(VK_CONTROL) & 0x8000 )
                {
                    val.i_int |= KEY_MODIFIER_CTRL;
                }
                if( GetKeyState(VK_SHIFT) & 0x8000 )
                {
                    val.i_int |= KEY_MODIFIER_SHIFT;
                }
                if( GetKeyState(VK_MENU) & 0x8000 )
                {
                    val.i_int |= KEY_MODIFIER_ALT;
                }

                var_Set( p_event->p_vlc, "key-pressed", val );
            }
            break;

        case WM_VLC_CHANGE_TEXT:
            if( p_event->p_vout->p_sys->b_using_overlay )
                SetWindowText( p_event->p_vout->p_sys->hwnd,
                    VOUT_TITLE " (hardware YUV overlay DirectX output)" );
            else if( p_event->p_vout->p_sys->b_hw_yuv )
                SetWindowText( p_event->p_vout->p_sys->hwnd,
                    VOUT_TITLE " (hardware YUV DirectX output)" );
            else SetWindowText( p_event->p_vout->p_sys->hwnd,
                    VOUT_TITLE " (software RGB DirectX output)" );
            break;

        default:
            /* Messages we don't handle directly are dispatched to the
             * window procedure */
            TranslateMessage(&msg);
            DispatchMessage(&msg);
            break;

        } /* End Switch */

    } /* End Main loop */

    if( msg.message == WM_QUIT )
    {
        msg_Warn( p_event, "WM_QUIT... should not happen!!" );
        p_event->p_vout->p_sys->hwnd = NULL; /* Window already destroyed */
    }

    msg_Dbg( p_event, "DirectXEventThread terminating" );

    /* clear the changes formerly signaled */
    p_event->p_vout->p_sys->i_changes = 0;

    DirectXCloseWindow( p_event->p_vout );
}


/* following functions are local */

/*****************************************************************************
 * DirectXCreateWindow: create a window for the video.
 *****************************************************************************
 * Before creating a direct draw surface, we need to create a window in which
 * the video will be displayed. This window will also allow us to capture the
 * events.
 *****************************************************************************/
static int DirectXCreateWindow( vout_thread_t *p_vout )
{
    HINSTANCE  hInstance;
    HMENU      hMenu;
    RECT       rect_window;

    vlc_value_t val;

    msg_Dbg( p_vout, "DirectXCreateWindow" );

    /* Get this module's instance */
    hInstance = GetModuleHandle(NULL);

    /* If an external window was specified, we'll draw in it. */
    var_Get( p_vout->p_vlc, "drawable", &val );
    p_vout->p_sys->hparent = p_vout->p_sys->hwnd =
             val.i_int ?  (void*)(ptrdiff_t) val.i_int : NULL;

    if( p_vout->p_sys->hparent )
    {
        msg_Dbg( p_vout, "using external window %p\n", p_vout->p_sys->hwnd );

        /* Set stuff in the window that we can not put directly in
         * a class (see below). */
        SetClassLong( p_vout->p_sys->hwnd,
                      GCL_STYLE, CS_DBLCLKS );
        SetClassLong( p_vout->p_sys->hwnd,
                      GCL_HBRBACKGROUND, (LONG)GetStockObject(BLACK_BRUSH) );
        SetClassLong( p_vout->p_sys->hwnd,
                      GCL_HCURSOR, (LONG)LoadCursor(NULL, IDC_ARROW) );
        /* Store a p_vout pointer into the window local storage (for later
         * use in DirectXEventProc). */
        SetWindowLong( p_vout->p_sys->hwnd, GWL_USERDATA, (LONG)p_vout );

        p_vout->p_sys->pf_wndproc =
               (WNDPROC)SetWindowLong( p_vout->p_sys->hwnd,
                                       GWL_WNDPROC, (LONG)DirectXEventProc );

        /* Blam! Erase everything that might have been there. */
        InvalidateRect( p_vout->p_sys->hwnd, NULL, TRUE );
    }
    else
    {
        WNDCLASSEX wc;                            /* window class components */
        HICON      vlc_icon = NULL;
        char       vlc_path[MAX_PATH+1];

        /* Get the Icon from the main app */
        vlc_icon = NULL;
        if( GetModuleFileName( NULL, vlc_path, MAX_PATH ) )
        {
            vlc_icon = ExtractIcon( hInstance, vlc_path, 0 );
        }

        /* Fill in the window class structure */
        wc.cbSize        = sizeof(WNDCLASSEX);
        wc.style         = CS_DBLCLKS;                   /* style: dbl click */
        wc.lpfnWndProc   = (WNDPROC)DirectXEventProc;       /* event handler */
        wc.cbClsExtra    = 0;                         /* no extra class data */
        wc.cbWndExtra    = 0;                        /* no extra window data */
        wc.hInstance     = hInstance;                            /* instance */
        wc.hIcon         = vlc_icon;                /* load the vlc big icon */
        wc.hCursor       = LoadCursor(NULL, IDC_ARROW);    /* default cursor */
        wc.hbrBackground = GetStockObject(BLACK_BRUSH);  /* background color */
        wc.lpszMenuName  = NULL;                                  /* no menu */
        wc.lpszClassName = "VLC DirectX";             /* use a special class */
        wc.hIconSm       = vlc_icon;              /* load the vlc small icon */

        /* Register the window class */
        if( !RegisterClassEx(&wc) )
        {
            WNDCLASS wndclass;

            if( vlc_icon )
            {
                DestroyIcon( vlc_icon );
            }

            /* Check why it failed. If it's because one already exists
             * then fine, otherwise return with an error. */
            if( !GetClassInfo( hInstance, "VLC DirectX", &wndclass ) )
            {
                msg_Err( p_vout, "DirectXCreateWindow RegisterClass FAILED" );
                return VLC_EGENERIC;
            }
        }

        /* When you create a window you give the dimensions you wish it to
         * have. Unfortunatly these dimensions will include the borders and
         * titlebar. We use the following function to find out the size of
         * the window corresponding to the useable surface we want */
        rect_window.top    = 10;
        rect_window.left   = 10;