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Sweden-Number/dlls/user/painting.c

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/*
* Window painting functions
*
* Copyright 1993, 1994, 1995, 2001, 2004 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 "ntstatus.h"
#include "winuser.h"
#include "wine/server.h"
#include "win.h"
#include "dce.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(win);
/***********************************************************************
* dump_rdw_flags
*/
static void dump_rdw_flags(UINT flags)
{
TRACE("flags:");
if (flags & RDW_INVALIDATE) TRACE(" RDW_INVALIDATE");
if (flags & RDW_INTERNALPAINT) TRACE(" RDW_INTERNALPAINT");
if (flags & RDW_ERASE) TRACE(" RDW_ERASE");
if (flags & RDW_VALIDATE) TRACE(" RDW_VALIDATE");
if (flags & RDW_NOINTERNALPAINT) TRACE(" RDW_NOINTERNALPAINT");
if (flags & RDW_NOERASE) TRACE(" RDW_NOERASE");
if (flags & RDW_NOCHILDREN) TRACE(" RDW_NOCHILDREN");
if (flags & RDW_ALLCHILDREN) TRACE(" RDW_ALLCHILDREN");
if (flags & RDW_UPDATENOW) TRACE(" RDW_UPDATENOW");
if (flags & RDW_ERASENOW) TRACE(" RDW_ERASENOW");
if (flags & RDW_FRAME) TRACE(" RDW_FRAME");
if (flags & RDW_NOFRAME) TRACE(" RDW_NOFRAME");
#define RDW_FLAGS \
(RDW_INVALIDATE | \
RDW_INTERNALPAINT | \
RDW_ERASE | \
RDW_VALIDATE | \
RDW_NOINTERNALPAINT | \
RDW_NOERASE | \
RDW_NOCHILDREN | \
RDW_ALLCHILDREN | \
RDW_UPDATENOW | \
RDW_ERASENOW | \
RDW_FRAME | \
RDW_NOFRAME)
if (flags & ~RDW_FLAGS) TRACE(" %04x", flags & ~RDW_FLAGS);
TRACE("\n");
#undef RDW_FLAGS
}
/***********************************************************************
* get_update_region
*
* Return update region for a window.
*/
static HRGN get_update_region( HWND hwnd, UINT *flags, HWND *child )
{
HRGN hrgn = 0;
NTSTATUS status;
RGNDATA *data;
size_t size = 256;
do
{
if (!(data = HeapAlloc( GetProcessHeap(), 0, sizeof(*data) + size - 1 )))
{
SetLastError( ERROR_OUTOFMEMORY );
return 0;
}
SERVER_START_REQ( get_update_region )
{
req->window = hwnd;
req->flags = *flags;
wine_server_set_reply( req, data->Buffer, size );
if (!(status = wine_server_call( req )))
{
size_t reply_size = wine_server_reply_size( reply );
data->rdh.dwSize = sizeof(data->rdh);
data->rdh.iType = RDH_RECTANGLES;
data->rdh.nCount = reply_size / sizeof(RECT);
data->rdh.nRgnSize = reply_size;
hrgn = ExtCreateRegion( NULL, size, data );
if (child) *child = reply->child;
*flags = reply->flags;
}
else size = reply->total_size;
}
SERVER_END_REQ;
HeapFree( GetProcessHeap(), 0, data );
} while (status == STATUS_BUFFER_OVERFLOW);
if (status) SetLastError( RtlNtStatusToDosError(status) );
return hrgn;
}
/***********************************************************************
* get_update_flags
*
* Get only the update flags, not the update region.
*/
static BOOL get_update_flags( HWND hwnd, HWND *child, UINT *flags )
{
BOOL ret;
SERVER_START_REQ( get_update_region )
{
req->window = hwnd;
req->flags = *flags | UPDATE_NOREGION;
if ((ret = !wine_server_call_err( req )))
{
if (child) *child = reply->child;
*flags = reply->flags;
}
}
SERVER_END_REQ;
return ret;
}
/***********************************************************************
* redraw_window_rects
*
* Redraw part of a window.
*/
static BOOL redraw_window_rects( HWND hwnd, UINT flags, const RECT *rects, UINT count )
{
BOOL ret;
SERVER_START_REQ( redraw_window )
{
req->window = hwnd;
req->flags = flags;
wine_server_add_data( req, rects, count * sizeof(RECT) );
ret = !wine_server_call_err( req );
}
SERVER_END_REQ;
return ret;
}
/***********************************************************************
* send_ncpaint
*
* Send a WM_NCPAINT message if needed, and return the resulting update region.
* Helper for erase_now and BeginPaint.
*/
static HRGN send_ncpaint( HWND hwnd, HWND *child, UINT *flags )
{
HRGN whole_rgn = get_update_region( hwnd, flags, child );
HRGN client_rgn = 0;
if (child) hwnd = *child;
if (whole_rgn)
{
RECT client, update;
INT type;
WND *win = WIN_GetPtr( hwnd );
if (!win || win == WND_OTHER_PROCESS)
{
DeleteObject( whole_rgn );
return 0;
}
/* check if update rgn overlaps with nonclient area */
type = GetRgnBox( whole_rgn, &update );
client = win->rectClient;
OffsetRect( &client, -win->rectWindow.left, -win->rectWindow.top );
if ((*flags & UPDATE_NONCLIENT) ||
update.left < client.left || update.top < client.top ||
update.right > client.right || update.bottom > client.bottom)
{
client_rgn = CreateRectRgnIndirect( &client );
CombineRgn( client_rgn, client_rgn, whole_rgn, RGN_AND );
/* check if update rgn contains complete nonclient area */
if (type == SIMPLEREGION && update.left == 0 && update.top == 0 &&
update.right == win->rectWindow.right - win->rectWindow.left &&
update.bottom == win->rectWindow.bottom - win->rectWindow.top)
{
DeleteObject( whole_rgn );
whole_rgn = (HRGN)1;
}
}
else
{
client_rgn = whole_rgn;
whole_rgn = 0;
}
/* map client region to client coordinates */
OffsetRgn( client_rgn, win->rectWindow.left - win->rectClient.left,
win->rectWindow.top - win->rectClient.top );
WIN_ReleasePtr( win );
if (whole_rgn) /* NOTE: WM_NCPAINT allows wParam to be 1 */
{
if (*flags & UPDATE_NONCLIENT) SendMessageW( hwnd, WM_NCPAINT, (WPARAM)whole_rgn, 0 );
if (whole_rgn > (HRGN)1) DeleteObject( whole_rgn );
}
}
return client_rgn;
}
/***********************************************************************
* send_erase
*
* Send a WM_ERASEBKGND message if needed, and optionally return the DC for painting.
* If a DC is requested, the region is selected into it.
* Helper for erase_now and BeginPaint.
*/
static BOOL send_erase( HWND hwnd, UINT flags, HRGN client_rgn,
RECT *clip_rect, HDC *hdc_ret )
{
BOOL need_erase = FALSE;
HDC hdc;
if (hdc_ret || (flags & UPDATE_ERASE))
{
UINT dcx_flags = DCX_INTERSECTRGN | DCX_WINDOWPAINT | DCX_USESTYLE;
if (IsIconic(hwnd)) dcx_flags |= DCX_WINDOW;
if ((hdc = GetDCEx( hwnd, client_rgn, dcx_flags )))
{
INT type = GetClipBox( hdc, clip_rect );
if (flags & UPDATE_ERASE)
{
/* don't erase if the clip box is empty */
if (type != NULLREGION)
need_erase = !SendMessageW( hwnd, WM_ERASEBKGND, (WPARAM)hdc, 0 );
}
if (!hdc_ret)
{
if (need_erase && hwnd != GetDesktopWindow()) /* FIXME: mark it as needing erase again */
RedrawWindow( hwnd, NULL, client_rgn, RDW_INVALIDATE | RDW_ERASE | RDW_NOCHILDREN );
ReleaseDC( hwnd, hdc );
}
}
if (hdc_ret) *hdc_ret = hdc;
}
return need_erase;
}
/***********************************************************************
* erase_now
*
* Implementation of RDW_ERASENOW behavior.
*/
static void erase_now( HWND hwnd, UINT rdw_flags )
{
HWND child;
HRGN hrgn;
/* loop while we find a child to repaint */
for (;;)
{
RECT rect;
UINT flags = UPDATE_NONCLIENT | UPDATE_ERASE;
if (rdw_flags & RDW_NOCHILDREN) flags |= UPDATE_NOCHILDREN;
else if (rdw_flags & RDW_ALLCHILDREN) flags |= UPDATE_ALLCHILDREN;
if (!(hrgn = send_ncpaint( hwnd, &child, &flags ))) break;
send_erase( child, flags, hrgn, &rect, NULL );
DeleteObject( hrgn );
if (!flags) break; /* nothing more to do */
if (rdw_flags & RDW_NOCHILDREN) break;
}
}
/***********************************************************************
* update_now
*
* Implementation of RDW_UPDATENOW behavior.
*
* FIXME: Windows uses WM_SYNCPAINT to cut down the number of intertask
* SendMessage() calls. This is a comment inside DefWindowProc() source
* from 16-bit SDK:
*
* This message avoids lots of inter-app message traffic
* by switching to the other task and continuing the
* recursion there.
*
* wParam = flags
* LOWORD(lParam) = hrgnClip
* HIWORD(lParam) = hwndSkip (not used; always NULL)
*
*/
static void update_now( HWND hwnd, UINT rdw_flags )
{
HWND prev = 0, child;
/* process pending expose events before painting */
MsgWaitForMultipleObjects( 0, NULL, FALSE, 0, QS_PAINT );
/* desktop window never gets WM_PAINT, only WM_ERASEBKGND */
if (hwnd == GetDesktopWindow()) erase_now( hwnd, rdw_flags | RDW_NOCHILDREN );
/* loop while we find a child to repaint */
for (;;)
{
UINT flags = UPDATE_PAINT | UPDATE_INTERNALPAINT;
if (rdw_flags & RDW_NOCHILDREN) flags |= UPDATE_NOCHILDREN;
else if (rdw_flags & RDW_ALLCHILDREN) flags |= UPDATE_ALLCHILDREN;
if (!get_update_flags( hwnd, &child, &flags )) break;
if (!flags) break; /* nothing more to do */
if (child == prev) /* same window again, didn't get repainted properly */
{
UINT erase_flags = UPDATE_NONCLIENT | UPDATE_ERASE | UPDATE_NOCHILDREN;
HRGN hrgn;
RECT rect;
TRACE( "%p not repainted properly, erasing\n", child );
if ((hrgn = send_ncpaint( child, NULL, &erase_flags )))
{
send_erase( child, erase_flags, hrgn, &rect, NULL );
DeleteObject( hrgn );
}
prev = 0;
}
else
{
prev = child;
SendMessageW( child, WM_PAINT, 0, 0 );
}
if (rdw_flags & RDW_NOCHILDREN) break;
}
}
/***********************************************************************
* BeginPaint (USER32.@)
*/
HDC WINAPI BeginPaint( HWND hwnd, PAINTSTRUCT *lps )
{
HWND full_handle;
HRGN hrgn;
UINT flags = UPDATE_NONCLIENT | UPDATE_ERASE | UPDATE_PAINT | UPDATE_INTERNALPAINT | UPDATE_NOCHILDREN;
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;
HideCaret( hwnd );
if (!(hrgn = send_ncpaint( hwnd, NULL, &flags ))) return 0;
lps->fErase = send_erase( hwnd, flags, hrgn, &lps->rcPaint, &lps->hdc );
if (!lps->hdc) DeleteObject( hrgn );
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;
}
/***********************************************************************
* RedrawWindow (USER32.@)
*/
BOOL WINAPI RedrawWindow( HWND hwnd, const RECT *rect, HRGN hrgn, UINT flags )
{
BOOL ret;
if (!hwnd) hwnd = GetDesktopWindow();
/* check if the window or its parents are visible/not minimized */
if (!WIN_IsWindowDrawable( hwnd, !(flags & RDW_FRAME) )) return TRUE;
if (TRACE_ON(win))
{
if (hrgn)
{
RECT r;
GetRgnBox( hrgn, &r );
TRACE( "%p region %p box %s ", hwnd, hrgn, wine_dbgstr_rect(&r) );
}
else if (rect)
TRACE( "%p rect %s ", hwnd, wine_dbgstr_rect(rect) );
else
TRACE( "%p whole window ", hwnd );
dump_rdw_flags(flags);
}
if (rect && !hrgn)
{
ret = redraw_window_rects( hwnd, flags, rect, 1 );
}
else if (!hrgn)
{
ret = redraw_window_rects( hwnd, flags, NULL, 0 );
}
else /* need to build a list of the region rectangles */
{
DWORD size;
RGNDATA *data = NULL;
static const RECT empty;
if (!(size = GetRegionData( hrgn, 0, NULL ))) return FALSE;
if (!(data = HeapAlloc( GetProcessHeap(), 0, size ))) return FALSE;
GetRegionData( hrgn, size, data );
if (!data->rdh.nCount) /* empty region -> use a single all-zero rectangle */
ret = redraw_window_rects( hwnd, flags, &empty, 1 );
else
ret = redraw_window_rects( hwnd, flags, (const RECT *)data->Buffer, data->rdh.nCount );
HeapFree( GetProcessHeap(), 0, data );
}
if (flags & RDW_UPDATENOW) update_now( hwnd, flags );
else if (flags & RDW_ERASENOW) erase_now( hwnd, flags );
return ret;
}
/***********************************************************************
* UpdateWindow (USER32.@)
*/
BOOL WINAPI UpdateWindow( HWND hwnd )
{
return RedrawWindow( hwnd, NULL, 0, RDW_UPDATENOW | RDW_ALLCHILDREN );
}
/***********************************************************************
* InvalidateRgn (USER32.@)
*/
BOOL WINAPI InvalidateRgn( HWND hwnd, HRGN hrgn, BOOL erase )
{
return RedrawWindow(hwnd, NULL, hrgn, RDW_INVALIDATE | (erase ? RDW_ERASE : 0) );
}
/***********************************************************************
* InvalidateRect (USER32.@)
*/
BOOL WINAPI InvalidateRect( HWND hwnd, const RECT *rect, BOOL erase )
{
return RedrawWindow( hwnd, rect, 0, RDW_INVALIDATE | (erase ? RDW_ERASE : 0) );
}
/***********************************************************************
* ValidateRgn (USER32.@)
*/
BOOL WINAPI ValidateRgn( HWND hwnd, HRGN hrgn )
{
return RedrawWindow( hwnd, NULL, hrgn, RDW_VALIDATE );
}
/***********************************************************************
* ValidateRect (USER32.@)
*/
BOOL WINAPI ValidateRect( HWND hwnd, const RECT *rect )
{
return RedrawWindow( hwnd, rect, 0, RDW_VALIDATE );
}
/***********************************************************************
* GetUpdateRgn (USER32.@)
*/
INT WINAPI GetUpdateRgn( HWND hwnd, HRGN hrgn, BOOL erase )
{
INT retval = ERROR;
UINT flags = UPDATE_NOCHILDREN;
HRGN update_rgn;
if (erase) flags |= UPDATE_NONCLIENT | UPDATE_ERASE;
if ((update_rgn = send_ncpaint( hwnd, NULL, &flags )))
{
RECT rect;
send_erase( hwnd, flags, update_rgn, &rect, NULL );
retval = CombineRgn( hrgn, update_rgn, 0, RGN_COPY );
DeleteObject( update_rgn );
}
return retval;
}
/***********************************************************************
* GetUpdateRect (USER32.@)
*/
BOOL WINAPI GetUpdateRect( HWND hwnd, LPRECT rect, BOOL erase )
{
HDC hdc;
RECT dummy;
UINT flags = UPDATE_NOCHILDREN;
HRGN update_rgn;
if (erase) flags |= UPDATE_NONCLIENT | UPDATE_ERASE;
if (!(update_rgn = send_ncpaint( hwnd, NULL, &flags ))) return FALSE;
if (rect) GetRgnBox( update_rgn, rect );
send_erase( hwnd, flags, update_rgn, &dummy, &hdc );
if (hdc)
{
if (rect) DPtoLP( hdc, (LPPOINT)rect, 2 );
ReleaseDC( hwnd, hdc );
}
else DeleteObject( update_rgn );
/* check if we still have an update region */
flags = UPDATE_PAINT | UPDATE_NOCHILDREN;
return (get_update_flags( hwnd, NULL, &flags ) && (flags & UPDATE_PAINT));
}
/***********************************************************************
* 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)
{
POINT pt;
GetDCOrgEx( hdc, &pt );
MapWindowPoints( 0, hwnd, &pt, 1 );
OffsetRgn( update_rgn, -pt.x, -pt.y );
ret = ExtSelectClipRgn( hdc, update_rgn, RGN_DIFF );
DeleteObject( update_rgn );
}
return ret;
}
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