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Sweden-Number/dlls/user/painting.c

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/*
* Window painting functions
*
* Copyright 1993, 1994, 1995, 2001 Alexandre Julliard
* Copyright 1999 Alex Korobka
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "config.h"
#include "wine/port.h"
#include <stdarg.h>
#include <string.h>
#include "windef.h"
#include "winbase.h"
#include "wingdi.h"
#include "wine/winuser16.h"
#include "wine/server.h"
#include "win.h"
#include "dce.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(win);
/***********************************************************************
* add_paint_count
*
* Add an increment (normally 1 or -1) to the current paint count of a window.
*/
static void add_paint_count( HWND hwnd, int incr )
{
SERVER_START_REQ( inc_window_paint_count )
{
req->handle = hwnd;
req->incr = incr;
wine_server_call( req );
}
SERVER_END_REQ;
}
/***********************************************************************
* copy_rgn
*
* copy a region, doing the right thing if the source region is 0 or 1
*/
static HRGN copy_rgn( HRGN hSrc )
{
if (hSrc > (HRGN)1)
{
HRGN hrgn = CreateRectRgn( 0, 0, 0, 0 );
CombineRgn( hrgn, hSrc, 0, RGN_COPY );
return hrgn;
}
return hSrc;
}
/***********************************************************************
* get_update_region
*
* Return update region for a window.
*/
static HRGN get_update_region( WND *win )
{
if (!win->hrgnUpdate) return CreateRectRgn( 0, 0, 0, 0 );
if (win->hrgnUpdate > (HRGN)1) return copy_rgn( win->hrgnUpdate );
return CreateRectRgn( 0, 0, win->rectWindow.right - win->rectWindow.left,
win->rectWindow.bottom - win->rectWindow.top );
}
/***********************************************************************
* get_update_regions
*
* Return update regions for the whole window and for the client area.
*/
static void get_update_regions( WND *win, HRGN *whole_rgn, HRGN *client_rgn )
{
if (win->hrgnUpdate > (HRGN)1)
{
RECT client, update;
/* check if update rgn overlaps with nonclient area */
GetRgnBox( win->hrgnUpdate, &update );
client = win->rectClient;
OffsetRect( &client, -win->rectWindow.left, -win->rectWindow.top );
if (update.left < client.left || update.top < client.top ||
update.right > client.right || update.bottom > client.bottom)
{
*whole_rgn = copy_rgn( win->hrgnUpdate );
*client_rgn = CreateRectRgnIndirect( &client );
if (CombineRgn( *client_rgn, *client_rgn, win->hrgnUpdate, RGN_AND ) == NULLREGION)
{
DeleteObject( *client_rgn );
*client_rgn = 0;
}
}
else
{
*whole_rgn = 0;
*client_rgn = copy_rgn( win->hrgnUpdate );
}
}
else
{
*client_rgn = *whole_rgn = win->hrgnUpdate; /* 0 or 1 */
}
}
/***********************************************************************
* begin_ncpaint
*
* Send a WM_NCPAINT message from inside BeginPaint().
* Returns update region cropped to client rectangle (and in client coords),
* and clears window update region and internal paint flag.
*/
static HRGN begin_ncpaint( HWND hwnd )
{
HRGN whole_rgn, client_rgn;
WND *wnd = WIN_GetPtr( hwnd );
if (!wnd || wnd == WND_OTHER_PROCESS) return 0;
TRACE("hwnd %p [%p] ncf %i\n",
hwnd, wnd->hrgnUpdate, wnd->flags & WIN_NEEDS_NCPAINT);
get_update_regions( wnd, &whole_rgn, &client_rgn );
if (whole_rgn) /* NOTE: WM_NCPAINT allows wParam to be 1 */
{
WIN_ReleasePtr( wnd );
SendMessageA( hwnd, WM_NCPAINT, (WPARAM)whole_rgn, 0 );
if (whole_rgn > (HRGN)1) DeleteObject( whole_rgn );
/* make sure the window still exists before continuing */
if (!(wnd = WIN_GetPtr( hwnd )) || wnd == WND_OTHER_PROCESS)
{
if (client_rgn > (HRGN)1) DeleteObject( client_rgn );
return 0;
}
}
if (wnd->hrgnUpdate || (wnd->flags & WIN_INTERNAL_PAINT)) add_paint_count( hwnd, -1 );
if (wnd->hrgnUpdate > (HRGN)1) DeleteObject( wnd->hrgnUpdate );
wnd->hrgnUpdate = 0;
wnd->flags &= ~(WIN_INTERNAL_PAINT | WIN_NEEDS_NCPAINT | WIN_NEEDS_BEGINPAINT);
if (client_rgn > (HRGN)1) OffsetRgn( client_rgn, wnd->rectWindow.left - wnd->rectClient.left,
wnd->rectWindow.top - wnd->rectClient.top );
WIN_ReleasePtr( wnd );
return client_rgn;
}
/***********************************************************************
* BeginPaint (USER32.@)
*/
HDC WINAPI BeginPaint( HWND hwnd, PAINTSTRUCT *lps )
{
INT dcx_flags;
BOOL bIcon;
HRGN hrgnUpdate;
RECT clipRect, clientRect;
HWND full_handle;
WND *wndPtr;
if (!lps) return 0;
if (!(full_handle = WIN_IsCurrentThread( hwnd )))
{
if (IsWindow(hwnd))
FIXME( "window %p belongs to other thread\n", hwnd );
return 0;
}
hwnd = full_handle;
/* send WM_NCPAINT and retrieve update region */
hrgnUpdate = begin_ncpaint( hwnd );
if (!hrgnUpdate && !IsWindow( hwnd )) return 0;
HideCaret( hwnd );
bIcon = (IsIconic(hwnd) && GetClassLongA(hwnd, GCL_HICON));
dcx_flags = DCX_INTERSECTRGN | DCX_WINDOWPAINT | DCX_USESTYLE;
if (bIcon) dcx_flags |= DCX_WINDOW;
if (GetClassLongA( hwnd, GCL_STYLE ) & CS_PARENTDC)
{
/* Don't clip the output to the update region for CS_PARENTDC window */
if (hrgnUpdate > (HRGN)1) DeleteObject( hrgnUpdate );
hrgnUpdate = 0;
dcx_flags &= ~DCX_INTERSECTRGN;
}
else
{
if (!hrgnUpdate) /* empty region, clip everything */
{
hrgnUpdate = CreateRectRgn( 0, 0, 0, 0 );
}
else if (hrgnUpdate == (HRGN)1) /* whole client area, don't clip */
{
hrgnUpdate = 0;
dcx_flags &= ~DCX_INTERSECTRGN;
}
}
lps->hdc = GetDCEx( hwnd, hrgnUpdate, dcx_flags );
/* ReleaseDC() in EndPaint() will delete the region */
if (!lps->hdc)
{
WARN("GetDCEx() failed in BeginPaint(), hwnd=%p\n", hwnd);
DeleteObject( hrgnUpdate );
return 0;
}
/* It is possible that the clip box is bigger than the window itself,
if CS_PARENTDC flag is set. Windows never return a paint rect bigger
than the window itself, so we need to intersect the cliprect with
the window */
GetClientRect( hwnd, &clientRect );
GetClipBox( lps->hdc, &clipRect );
LPtoDP(lps->hdc, (LPPOINT)&clipRect, 2); /* GetClipBox returns LP */
IntersectRect(&lps->rcPaint, &clientRect, &clipRect);
DPtoLP(lps->hdc, (LPPOINT)&lps->rcPaint, 2); /* we must return LP */
TRACE("hdc = %p box = (%ld,%ld - %ld,%ld)\n",
lps->hdc, lps->rcPaint.left, lps->rcPaint.top, lps->rcPaint.right, lps->rcPaint.bottom );
if (!(wndPtr = WIN_GetPtr( hwnd )) || wndPtr == WND_OTHER_PROCESS) return 0;
lps->fErase = (wndPtr->flags & WIN_NEEDS_ERASEBKGND) != 0;
wndPtr->flags &= ~WIN_NEEDS_ERASEBKGND;
WIN_ReleasePtr( wndPtr );
if (lps->fErase)
lps->fErase = !SendMessageA( hwnd, WM_ERASEBKGND, (WPARAM)lps->hdc, 0 );
TRACE("hdc = %p box = (%ld,%ld - %ld,%ld), fErase = %d\n",
lps->hdc, lps->rcPaint.left, lps->rcPaint.top, lps->rcPaint.right, lps->rcPaint.bottom,
lps->fErase);
return lps->hdc;
}
/***********************************************************************
* EndPaint (USER32.@)
*/
BOOL WINAPI EndPaint( HWND hwnd, const PAINTSTRUCT *lps )
{
if (!lps) return FALSE;
ReleaseDC( hwnd, lps->hdc );
ShowCaret( hwnd );
return TRUE;
}
/***********************************************************************
* GetUpdateRgn (USER32.@)
*/
INT WINAPI GetUpdateRgn( HWND hwnd, HRGN hrgn, BOOL erase )
{
INT retval;
HRGN update_rgn;
WND *wndPtr = WIN_GetPtr( hwnd );
if (!wndPtr) return ERROR;
if (wndPtr == WND_OTHER_PROCESS)
{
FIXME( "not supported on other process window %p\n", hwnd );
return ERROR;
}
if ((update_rgn = get_update_region( wndPtr )))
{
/* map coordinates and clip to client area */
OffsetRgn( update_rgn, wndPtr->rectWindow.left - wndPtr->rectClient.left,
wndPtr->rectWindow.top - wndPtr->rectClient.top );
SetRectRgn( hrgn, 0, 0, wndPtr->rectClient.right - wndPtr->rectClient.left,
wndPtr->rectClient.bottom - wndPtr->rectClient.top );
retval = CombineRgn( hrgn, hrgn, update_rgn, RGN_AND );
DeleteObject( update_rgn );
}
else retval = ERROR;
WIN_ReleasePtr( wndPtr );
if (erase) RedrawWindow( hwnd, NULL, 0, RDW_ERASENOW | RDW_NOCHILDREN );
return retval;
}
/***********************************************************************
* GetUpdateRect (USER32.@)
*/
BOOL WINAPI GetUpdateRect( HWND hwnd, LPRECT rect, BOOL erase )
{
WND *wndPtr;
BOOL ret = FALSE;
HRGN update_rgn = CreateRectRgn( 0, 0, 0, 0 );
if (GetUpdateRgn( hwnd, update_rgn, erase ) == ERROR)
{
DeleteObject( update_rgn );
return FALSE;
}
if (rect)
{
GetRgnBox( update_rgn, rect );
if (GetClassLongA(hwnd, GCL_STYLE) & CS_OWNDC)
{
HDC hdc = GetDCEx( hwnd, 0, DCX_USESTYLE );
if (hdc)
{
if (GetMapMode(hdc) != MM_TEXT) DPtoLP(hdc, (LPPOINT)rect, 2);
ReleaseDC( hwnd, hdc );
}
}
}
DeleteObject( update_rgn );
wndPtr = WIN_GetPtr( hwnd );
if (wndPtr && wndPtr != WND_OTHER_PROCESS)
{
ret = (wndPtr->hrgnUpdate != 0);
WIN_ReleasePtr( wndPtr );
}
return ret;
}
/***********************************************************************
* ExcludeUpdateRgn (USER32.@)
*/
INT WINAPI ExcludeUpdateRgn( HDC hdc, HWND hwnd )
{
HRGN update_rgn = CreateRectRgn( 0, 0, 0, 0 );
INT ret = GetUpdateRgn( hwnd, update_rgn, FALSE );
if (ret != ERROR)
{
/* do ugly coordinate translations in dce.c */
ret = DCE_ExcludeRgn( hdc, hwnd, update_rgn );
DeleteObject( update_rgn );
}
return ret;
}
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