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Date: Tue, 15 Feb 2005 21:28:48 +0900 (JST) From: "Michael Leonhard" Subject: [SDL] resize bug on Win32 and patch This is my first post to this mailing list. In this email I will detail a bug in the behavior of resizable SDL windows on Win32. Then I will explain the solution and provide a patch. Symptoms: Under Windows, an SDL display created with the SDL_RESIZABLE flag exhibits quirky behavior when being maximized. The window is resized to the proper size, but it is shifted upwards about half the height of the title bar. Similarly, a window whose origin is above the top of the screen will spontaneously move its upper-left origin upon being resized. After two such resize-induced moves, the title bar will be entirely off the top edge of the screen. Subsequently, when the mouse is clicked and released on the window border, the window will shrink its height spontaneously. This height shrinkage occurs even if the user did not resize the border. To observe this curious situation, please invoke: SDL-1.2.8/test/testwm.exe -resize Cause: A pair of integers, SDL_windowX and SDL_windowY, are defined in video/wincommon/SDL_sysevents.c. They are used by the DirectX video driver and the DIB video driver: video/windx5/SDL_dx5video.c video/windib/SDL_dibvideo.c As I understand the source code, the primary use of these variables is to create a rectangle that represents the surface area in CLIENT SPACE. Client space refers to a coordinate system that originates at the upper left corner of a Win32 Window's drawable area. This is just inside the window border and title bar. This client space rectangle, called bounds, is subsequently converted to screen space with a call to AdjustWindowRectEx. The problem is found in SDL's handling of the WM_WINDOWPOSCHANGED message. According to MSDN, "The WM_WINDOWPOSCHANGED message is sent to a window whose size, position, or place in the Z order has changed as a result of a call to the SetWindowPos function or another window-management function." I have confirmed that this message is indeed being sent to the SDL window when the mouse is clicked on the window border, even if the window border is not dragged. In video/wincommon/SDL_sysevents.c, on line 464, in response to the WM_WINDOWPOSCHANGED message, the (potentially) new client rectangle is obtained. This rectangle is translated into screen coordinates and THEN assigned to the SDL_windowX and Y variables. Thus screen coordinates are being assigned to client coordinate variables. Once this is understood, the solution is apparent: assign SDL_windowX and Y before translating the rectangle to screen coordinates. This is accomplished by the following patch. -Mike_L
author Sam Lantinga <slouken@libsdl.org>
date Sun, 29 Jan 2006 08:50:06 +0000
parents 4ab6d1fd028f
children c9b51268668f
line wrap: on
line source

/*
    SDL - Simple DirectMedia Layer
    Copyright (C) 1997-2004 Sam Lantinga

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Library General Public
    License as published by the Free Software Foundation; either
    version 2 of the License, or (at your option) any later version.

    This library 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
    Library General Public License for more details.

    You should have received a copy of the GNU Library General Public
    License along with this library; if not, write to the Free
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

    Sam Lantinga
    slouken@libsdl.org
*/

#ifdef SAVE_RCSID
static char rcsid =
 "@(#) $Id$";
#endif

/* Handle the event stream, converting photon events into SDL events */

#define DISABLE_X11

#include <stdio.h>
#include <setjmp.h>
#include <sys/time.h>

#include <Ph.h>
#include <photon/PkKeyDef.h>

#include "SDL.h"
#include "SDL_syswm.h"
#include "SDL_sysevents.h"
#include "SDL_sysvideo.h"
#include "SDL_events_c.h"
#include "SDL_ph_video.h"
#include "SDL_ph_modes_c.h"
#include "SDL_ph_image_c.h"
#include "SDL_ph_events_c.h"
#include "SDL_phyuv_c.h"

/* The translation tables from a photon keysym to a SDL keysym */
static SDLKey ODD_keymap[256];
static SDLKey MISC_keymap[0xFF + 1];
SDL_keysym *ph_TranslateKey(PhKeyEvent_t *key, SDL_keysym *keysym);

/* Check to see if this is a repeated key.
   (idea shamelessly lifted from GII -- thanks guys! :) */
static int ph_WarpedMotion(_THIS, PhEvent_t *winEvent)
{
    PhRect_t *rect = PhGetRects( winEvent );

    int centre_x, centre_y;
    int dx, dy;
    short abs_x, abs_y;
    int posted;

    centre_x = SDL_VideoSurface->w / 2;
    centre_y = SDL_VideoSurface->h / 2;

    dx = rect->ul.x - centre_x;
    dy = rect->ul.y - centre_y;

    posted = SDL_PrivateMouseMotion( 0, 1, dx, dy );

    /* Move mouse cursor to middle of the window */
    PtGetAbsPosition( window, &abs_x, &abs_y );
    PhMoveCursorAbs(PhInputGroup(NULL), abs_x + centre_x, abs_y + centre_y);

    return (posted);
}

/* Control which motion flags the window has set, a flags value of -1 sets
 * MOTION_BUTTON and MOTION_NOBUTTON */

static void set_motion_sensitivity(_THIS, unsigned int flags)
{
    int rid;
    int fields = Ph_EV_PTR_MOTION_BUTTON | Ph_EV_PTR_MOTION_NOBUTTON;
    PhRegion_t region;

    if( window )
    {
        rid = PtWidgetRid(window);
        if( rid != 0 && PhRegionQuery(rid, &region, NULL, NULL, 0) == 0 )
        {
            region.events_sense=(region.events_sense & ~fields)|(flags & fields);
            PhRegionChange(Ph_REGION_EV_SENSE, 0, &region, NULL, NULL);
        }
    }
}

/* Convert the photon button state value to an SDL value */
static Uint8 ph2sdl_mousebutton(unsigned short button_state)
{
    Uint8 mouse_button = 0;

    if (button_state & Ph_BUTTON_SELECT)
        mouse_button |= SDL_BUTTON_LEFT;
    if (button_state & Ph_BUTTON_MENU)
        mouse_button |= SDL_BUTTON_RIGHT;
    if (button_state & Ph_BUTTON_ADJUST)
        mouse_button |= SDL_BUTTON_MIDDLE;

    return (mouse_button);
}

static int ph_DispatchEvent(_THIS)
{
    int posted;
    PhRect_t* rect;
    PhPointerEvent_t* pointerEvent;
    PhKeyEvent_t* keyEvent;
    PhWindowEvent_t* winEvent;
    int i, buttons;
    SDL_Rect sdlrects[PH_SDL_MAX_RECTS];
	
    posted = 0;
	
    switch (event->type)
    {
        case Ph_EV_BOUNDARY:
        {
            if (event->subtype == Ph_EV_PTR_ENTER)
            {
                posted = SDL_PrivateAppActive(1, SDL_APPMOUSEFOCUS);
            }
            else if (event->subtype ==Ph_EV_PTR_LEAVE)
            {
                posted = SDL_PrivateAppActive(0, SDL_APPMOUSEFOCUS);	
            }
        }
        break;

        case Ph_EV_PTR_MOTION_BUTTON:
        case Ph_EV_PTR_MOTION_NOBUTTON:
        {
            if (SDL_VideoSurface)
            {
                pointerEvent = PhGetData(event);
                rect = PhGetRects(event);

                if (mouse_relative)
                {
                    posted = ph_WarpedMotion(this, event);
                }
                else
                {
                    posted = SDL_PrivateMouseMotion(0, 0, rect->ul.x, rect->ul.y);
                }
            }
        }
        break;

        case Ph_EV_BUT_PRESS:
        {
            pointerEvent = PhGetData( event );
            buttons = ph2sdl_mousebutton( pointerEvent->buttons );
            if (buttons != 0)
            {
                posted = SDL_PrivateMouseButton(SDL_PRESSED, buttons, 0, 0);
            }
        }
        break;

        case Ph_EV_BUT_RELEASE:
        {
            pointerEvent = PhGetData(event);
            buttons = ph2sdl_mousebutton(pointerEvent->buttons);
            if (event->subtype == Ph_EV_RELEASE_REAL && buttons != 0)
            {
                posted = SDL_PrivateMouseButton(SDL_RELEASED, buttons, 0, 0);
            }
            else if(event->subtype == Ph_EV_RELEASE_PHANTOM)
            {
                /* If the mouse is outside the window,
                 * only a phantom release event is sent, so
                 * check if the window doesn't have mouse focus.
                 * Not perfect, maybe checking the mouse button
                 * state for Ph_EV_BOUNDARY events would be
                 * better. */
                if ((SDL_GetAppState() & SDL_APPMOUSEFOCUS) == 0)
		{
                    posted = SDL_PrivateMouseButton(SDL_RELEASED, buttons, 0, 0);
                }
            }
        }
        break;

        case Ph_EV_WM:
        {
            winEvent = PhGetData(event);

            /* losing focus */
            if ((winEvent->event_f==Ph_WM_FOCUS) && (winEvent->event_state==Ph_WM_EVSTATE_FOCUSLOST))
            {
                set_motion_sensitivity(this, Ph_EV_PTR_MOTION_BUTTON);
                posted = SDL_PrivateAppActive(0, SDL_APPINPUTFOCUS);	
            }
            /* gaining focus */
            else if ((winEvent->event_f==Ph_WM_FOCUS) && (winEvent->event_state==Ph_WM_EVSTATE_FOCUS))
            {
                set_motion_sensitivity(this, -1);
                posted = SDL_PrivateAppActive(1, SDL_APPINPUTFOCUS);
            }
            /* request quit */
            else if (winEvent->event_f==Ph_WM_CLOSE)
            {
                posted = SDL_PrivateQuit();
            }
            /* request hide/unhide */
            else if (winEvent->event_f==Ph_WM_HIDE)
            {
                if (currently_hided)
                {
                   /* got unhide window event                                */
                   /* TODO: restore application's palette if in palette mode */
                   currently_hided=0;
                }
                else
                {
                   /* got hide window event                                  */
                   /* TODO: restore original palette if in palette mode      */
                   currently_hided=1;
                }
            }
            /* request to resize */
            else if (winEvent->event_f==Ph_WM_RESIZE)
            {
                currently_maximized=0;
                #if (_NTO_VERSION < 630)
                   SDL_PrivateResize(winEvent->size.w+1, winEvent->size.h+1);
                #else
                   /* QNX 6.3.0 have this bug fixed */
                   SDL_PrivateResize(winEvent->size.w, winEvent->size.h);
                #endif /* _NTO_VERSION */
            }
            /* request to move */
            else if (winEvent->event_f==Ph_WM_MOVE)
            {
                if (current_overlay!=NULL)
                {
                   int lockedstate=current_overlay->hwdata->locked;
                   int chromastate=current_overlay->hwdata->ischromakey;
                   int error;
                   SDL_Rect target;

                   current_overlay->hwdata->locked=1;
                   target.x=current_overlay->hwdata->CurrentViewPort.pos.x;
                   target.y=current_overlay->hwdata->CurrentViewPort.pos.y;
                   target.w=current_overlay->hwdata->CurrentViewPort.size.w;
                   target.h=current_overlay->hwdata->CurrentViewPort.size.h;
                   current_overlay->hwdata->ischromakey=0;
                   error=ph_DisplayYUVOverlay(this, current_overlay, &target);
                   if (!error)
                   {
                       current_overlay->hwdata->ischromakey=chromastate;
                       current_overlay->hwdata->locked=lockedstate;
                   }
                }
            }
            /* maximize request */
            else if (winEvent->event_f==Ph_WM_MAX)
            {
                /* window already moved and resized here */
                currently_maximized=1;
            }
            /* restore request */
            else if (winEvent->event_f==Ph_WM_RESTORE)
            {
                /* window already moved and resized here */
                currently_maximized=0;
            }
        }
        break;

        /* window has been resized, moved or removed */
        case Ph_EV_EXPOSE:
        {
            if (event->num_rects!=0)
            {
                int numrects;

                if (SDL_VideoSurface)
                {
                    rect = PhGetRects(event);
                    if (event->num_rects>PH_SDL_MAX_RECTS)
                    {
                       /* sorry, buffers underrun, we'll update only first PH_SDL_MAX_RECTS rects */
                       numrects=PH_SDL_MAX_RECTS;
                    }

                    for(i=0; i<event->num_rects; i++)
                    {
                        sdlrects[i].x = rect[i].ul.x;
                        sdlrects[i].y = rect[i].ul.y;
                        sdlrects[i].w = rect[i].lr.x - rect[i].ul.x + 1;
                        sdlrects[i].h = rect[i].lr.y - rect[i].ul.y + 1;
                    }

                    this->UpdateRects(this, event->num_rects, sdlrects);

                    if (current_overlay!=NULL)
                    {
                        int lockedstate=current_overlay->hwdata->locked;
                        int error;
                        SDL_Rect target;

                        current_overlay->hwdata->locked=1;
                        target.x=current_overlay->hwdata->CurrentViewPort.pos.x;
                        target.y=current_overlay->hwdata->CurrentViewPort.pos.y;
                        target.w=current_overlay->hwdata->CurrentViewPort.size.w;
                        target.h=current_overlay->hwdata->CurrentViewPort.size.h;
                        current_overlay->hwdata->forcedredraw=1;
                        error=ph_DisplayYUVOverlay(this, current_overlay, &target);
                        if (!error)
                        {
                            current_overlay->hwdata->forcedredraw=0;
                            current_overlay->hwdata->locked=lockedstate;
                        }
                    }
                }
            }
        }
	break;

        case Ph_EV_KEY:
        {
            SDL_keysym keysym;

            posted = 0;

            keyEvent = PhGetData( event );

            if (Pk_KF_Key_Down & keyEvent->key_flags)
            {
                /* split the wheel events from real key events */
                if ((keyEvent->key_cap==Pk_Up) && (keyEvent->key_scan==0) && ((keyEvent->key_flags & Pk_KF_Scan_Valid)==Pk_KF_Scan_Valid))
                {
                   posted = SDL_PrivateMouseButton(SDL_PRESSED, SDL_BUTTON_WHEELUP, 0, 0);
                   break;
                }
                if ((keyEvent->key_cap==Pk_Down) && (keyEvent->key_scan==0) && ((keyEvent->key_flags & Pk_KF_Scan_Valid)==Pk_KF_Scan_Valid))
                {
                   posted = SDL_PrivateMouseButton(SDL_PRESSED, SDL_BUTTON_WHEELDOWN, 0, 0);
                   break;
                }
                posted = SDL_PrivateKeyboard(SDL_PRESSED, ph_TranslateKey(keyEvent, &keysym));
            }
            else /* must be key release */
            {
                /* split the wheel events from real key events */
                if ((keyEvent->key_cap==Pk_Up) && (keyEvent->key_scan==0) && ((keyEvent->key_flags & Pk_KF_Scan_Valid)==Pk_KF_Scan_Valid))
                {
                   posted = SDL_PrivateMouseButton(SDL_RELEASED, SDL_BUTTON_WHEELUP, 0, 0);
                   break;
                }
                if ((keyEvent->key_cap==Pk_Down) && (keyEvent->key_scan==0) && ((keyEvent->key_flags & Pk_KF_Scan_Valid)==Pk_KF_Scan_Valid))
                {
                   posted = SDL_PrivateMouseButton(SDL_RELEASED, SDL_BUTTON_WHEELDOWN, 0, 0);
                   break;
                }
                posted = SDL_PrivateKeyboard(SDL_RELEASED, ph_TranslateKey( keyEvent, &keysym));
            }
        }
        break;
        
        case Ph_EV_INFO:
        {
           if (event->subtype==Ph_OFFSCREEN_INVALID)
           {
              unsigned long* EvInfoData;

              EvInfoData=(unsigned long*)PhGetData(event);

              switch (*EvInfoData)
              {
                 case Pg_VIDEO_MODE_SWITCHED:
                      {
                      }
                      break;
                 case Pg_ENTERED_DIRECT:
                      {
                      }
                      break;
                 case Pg_EXITED_DIRECT:
                      {
                      }
                      break;
                 case Pg_DRIVER_STARTED:
                      {
                      }
                      break;
              }
           }
        }
        break;
    }

    return(posted);
}

/* perform a blocking read if no events available */
int ph_Pending(_THIS)
{
    /* Flush the display connection and look to see if events are queued */
    PgFlush();

    while (1)
    {
        switch(PhEventPeek(event, EVENT_SIZE))
        {
            case Ph_EVENT_MSG:
                 return 1;
            case -1:
                 SDL_SetError("ph_Pending(): PhEventNext failed.\n");
                 return 0;
            default:
                 return 0;
        }
    }

    /* Oh well, nothing is ready .. */
    return(0);
}

void ph_PumpEvents(_THIS)
{
    /* Flush the display connection and look to see if events are queued */
    PgFlush();

    while (ph_Pending(this))
    {
        PtEventHandler(event);
        ph_DispatchEvent(this);
    }
}

void ph_InitKeymap(void)
{
    int i;

    /* Odd keys used in international keyboards */
    for (i=0; i<SDL_TABLESIZE(ODD_keymap); ++i)
    {
        ODD_keymap[i] = SDLK_UNKNOWN;
    }

    /* Map the miscellaneous keys */
    for (i=0; i<SDL_TABLESIZE(MISC_keymap); ++i)
    {
        MISC_keymap[i] = SDLK_UNKNOWN;
    }

    MISC_keymap[Pk_BackSpace&0xFF] = SDLK_BACKSPACE;
    MISC_keymap[Pk_Tab&0xFF] = SDLK_TAB;
    MISC_keymap[Pk_Clear&0xFF] = SDLK_CLEAR;
    MISC_keymap[Pk_Return&0xFF] = SDLK_RETURN;
    MISC_keymap[Pk_Pause&0xFF] = SDLK_PAUSE;
    MISC_keymap[Pk_Escape&0xFF] = SDLK_ESCAPE;
    MISC_keymap[Pk_Delete&0xFF] = SDLK_DELETE;

    MISC_keymap[Pk_KP_0&0xFF] = SDLK_KP0;
    MISC_keymap[Pk_KP_1&0xFF] = SDLK_KP1;
    MISC_keymap[Pk_KP_2&0xFF] = SDLK_KP2;
    MISC_keymap[Pk_KP_3&0xFF] = SDLK_KP3;
    MISC_keymap[Pk_KP_4&0xFF] = SDLK_KP4;
    MISC_keymap[Pk_KP_5&0xFF] = SDLK_KP5;
    MISC_keymap[Pk_KP_6&0xFF] = SDLK_KP6;
    MISC_keymap[Pk_KP_7&0xFF] = SDLK_KP7;
    MISC_keymap[Pk_KP_8&0xFF] = SDLK_KP8;
    MISC_keymap[Pk_KP_9&0xFF] = SDLK_KP9;

    MISC_keymap[Pk_KP_Decimal&0xFF] = SDLK_KP_PERIOD;
    MISC_keymap[Pk_KP_Divide&0xFF] = SDLK_KP_DIVIDE;
    MISC_keymap[Pk_KP_Multiply&0xFF] = SDLK_KP_MULTIPLY;
    MISC_keymap[Pk_KP_Subtract&0xFF] = SDLK_KP_MINUS;
    MISC_keymap[Pk_KP_Add&0xFF] = SDLK_KP_PLUS;
    MISC_keymap[Pk_KP_Enter&0xFF] = SDLK_KP_ENTER;
    MISC_keymap[Pk_KP_Equal&0xFF] = SDLK_KP_EQUALS;

    MISC_keymap[Pk_Up&0xFF] = SDLK_UP;
    MISC_keymap[Pk_Down&0xFF] = SDLK_DOWN;
    MISC_keymap[Pk_Right&0xFF] = SDLK_RIGHT;
    MISC_keymap[Pk_Left&0xFF] = SDLK_LEFT;
    MISC_keymap[Pk_Insert&0xFF] = SDLK_INSERT;
    MISC_keymap[Pk_Home&0xFF] = SDLK_HOME;
    MISC_keymap[Pk_End&0xFF] = SDLK_END;
    MISC_keymap[Pk_Pg_Up&0xFF] = SDLK_PAGEUP;
    MISC_keymap[Pk_Pg_Down&0xFF] = SDLK_PAGEDOWN;

    MISC_keymap[Pk_F1&0xFF] = SDLK_F1;
    MISC_keymap[Pk_F2&0xFF] = SDLK_F2;
    MISC_keymap[Pk_F3&0xFF] = SDLK_F3;
    MISC_keymap[Pk_F4&0xFF] = SDLK_F4;
    MISC_keymap[Pk_F5&0xFF] = SDLK_F5;
    MISC_keymap[Pk_F6&0xFF] = SDLK_F6;
    MISC_keymap[Pk_F7&0xFF] = SDLK_F7;
    MISC_keymap[Pk_F8&0xFF] = SDLK_F8;
    MISC_keymap[Pk_F9&0xFF] = SDLK_F9;
    MISC_keymap[Pk_F10&0xFF] = SDLK_F10;
    MISC_keymap[Pk_F11&0xFF] = SDLK_F11;
    MISC_keymap[Pk_F12&0xFF] = SDLK_F12;
    MISC_keymap[Pk_F13&0xFF] = SDLK_F13;
    MISC_keymap[Pk_F14&0xFF] = SDLK_F14;
    MISC_keymap[Pk_F15&0xFF] = SDLK_F15;

    MISC_keymap[Pk_Num_Lock&0xFF] = SDLK_NUMLOCK;
    MISC_keymap[Pk_Caps_Lock&0xFF] = SDLK_CAPSLOCK;
    MISC_keymap[Pk_Scroll_Lock&0xFF] = SDLK_SCROLLOCK;
    MISC_keymap[Pk_Shift_R&0xFF] = SDLK_RSHIFT;
    MISC_keymap[Pk_Shift_L&0xFF] = SDLK_LSHIFT;
    MISC_keymap[Pk_Control_R&0xFF] = SDLK_RCTRL;
    MISC_keymap[Pk_Control_L&0xFF] = SDLK_LCTRL;
    MISC_keymap[Pk_Alt_R&0xFF] = SDLK_RALT;
    MISC_keymap[Pk_Alt_L&0xFF] = SDLK_LALT;
    MISC_keymap[Pk_Meta_R&0xFF] = SDLK_RMETA;
    MISC_keymap[Pk_Meta_L&0xFF] = SDLK_LMETA;
    MISC_keymap[Pk_Super_L&0xFF] = SDLK_LSUPER;
    MISC_keymap[Pk_Super_R&0xFF] = SDLK_RSUPER;
    MISC_keymap[Pk_Mode_switch&0xFF] = SDLK_MODE; /* "Alt Gr" key    */

    MISC_keymap[Pk_Help&0xFF] = SDLK_HELP;
    MISC_keymap[Pk_Print&0xFF] = SDLK_PRINT;
    MISC_keymap[Pk_Break&0xFF] = SDLK_BREAK;
    MISC_keymap[Pk_Menu&0xFF] = SDLK_MENU;        /* Windows "Menu" key */

    MISC_keymap[Pk_Hyper_R&0xFF] = SDLK_RSUPER;   /* Right "Windows" */

    /* Left "Windows" key, but it can't be catched by application */
    MISC_keymap[Pk_Hyper_L&0xFF] = SDLK_LSUPER;
}

static unsigned long cap;

SDL_keysym *ph_TranslateKey(PhKeyEvent_t *key, SDL_keysym *keysym)
{
    /* 'sym' is set to the value of the key with modifiers applied to it.
       This member is valid only if Pk_KF_Sym_Valid is set in the key_flags.
       We will assume it is valid. */

    /* FIXME: This needs to check whether the cap & scancode is valid */

    cap = key->key_cap;

    switch (cap>>8)
    {
        case 0x00:  /* Latin 1 */
        case 0x01:  /* Latin 2 */
        case 0x02:  /* Latin 3 */
        case 0x03:  /* Latin 4 */
        case 0x04:  /* Katakana */
        case 0x05:  /* Arabic */
        case 0x06:  /* Cyrillic */
        case 0x07:  /* Greek */
        case 0x08:  /* Technical */
        case 0x0A:  /* Publishing */
        case 0x0C:  /* Hebrew */
        case 0x0D:  /* Thai */
                   keysym->sym = (SDLKey)(cap&0xFF);
                   /* Map capital letter syms to lowercase */
                   if ((keysym->sym >= 'A')&&(keysym->sym <= 'Z'))
                       keysym->sym += ('a'-'A');
                   break;
        case 0xF0:
                   keysym->sym = MISC_keymap[cap&0xFF];
                   break;
        default:
                   keysym->sym = SDLK_UNKNOWN;                
                   break;
    }

    keysym->scancode = key->key_scan;
    keysym->unicode = 0;

    if (SDL_TranslateUNICODE)
    {
        char utf8[MB_CUR_MAX];
        int utf8len;
        wchar_t unicode;

        switch (keysym->scancode)
        {
           /* Esc key */
           case 0x01: keysym->unicode = 27;
                      break;
           /* BackSpace key */
           case 0x0E: keysym->unicode = 127;
                      break;
           /* Enter key */
           case 0x1C: keysym->unicode = 10;
                      break;
           default:
                      utf8len = PhKeyToMb(utf8, key);
                      if (utf8len > 0)
                      {
                         utf8len = mbtowc(&unicode, utf8, utf8len);
                         if (utf8len > 0)
                         {
                             keysym->unicode = unicode;
                         }
                      }
                      break;
        }

    }

    return (keysym);
}

void ph_InitOSKeymap(_THIS)
{
    ph_InitKeymap();
}