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Sweden-Number/dlls/user32/painting.c

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/*
* Window painting functions
*
* Copyright 1993, 1994, 1995, 2001, 2004, 2005, 2008 Alexandre Julliard
* Copyright 1996, 1997, 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include <assert.h>
#include <stdarg.h>
#include <string.h>
#include "ntstatus.h"
#define WIN32_NO_STATUS
#include "user_private.h"
#include "win.h"
#include "controls.h"
#include "wine/server.h"
#include "wine/list.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(win);
/***********************************************************************
* free_dce
*
* Free a class or window DCE.
*/
void free_dce( struct dce *dce, HWND hwnd )
{
/* FIXME: move callers to win32u */
NtUserCallTwoParam( (UINT_PTR)dce, HandleToUlong(hwnd), NtUserFreeDCE );
}
/***********************************************************************
* invalidate_dce
*
* It is called from SetWindowPos() - we have to
* mark as dirty all busy DCEs for windows that have pWnd->parent as
* an ancestor and whose client rect intersects with specified update
* rectangle. In addition, pWnd->parent DCEs may need to be updated if
* DCX_CLIPCHILDREN flag is set.
*/
void invalidate_dce( WND *win, const RECT *extra_rect )
{
/* FIXME: move callers to win32u */
NtUserCallTwoParam( (UINT_PTR)win, (UINT_PTR)extra_rect, NtUserInvalidateDCE );
}
/***********************************************************************
* get_update_region
*
* Return update region (in screen coordinates) 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 = wine_server_user_handle( hwnd );
req->from_child = wine_server_user_handle( child ? *child : 0 );
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, data->rdh.dwSize + data->rdh.nRgnSize, data );
if (child) *child = wine_server_ptr_handle( 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;
}
/***********************************************************************
* copy_bits_from_surface
*
* Copy bits from a window surface; helper for move_window_bits and move_window_bits_parent.
*/
static void copy_bits_from_surface( HWND hwnd, struct window_surface *surface,
const RECT *dst, const RECT *src )
{
char buffer[FIELD_OFFSET( BITMAPINFO, bmiColors[256] )];
BITMAPINFO *info = (BITMAPINFO *)buffer;
void *bits;
UINT flags = UPDATE_NOCHILDREN | UPDATE_CLIPCHILDREN;
HRGN rgn = get_update_region( hwnd, &flags, NULL );
HDC hdc = NtUserGetDCEx( hwnd, rgn, DCX_CACHE | DCX_WINDOW | DCX_EXCLUDERGN );
bits = surface->funcs->get_info( surface, info );
surface->funcs->lock( surface );
SetDIBitsToDevice( hdc, dst->left, dst->top, dst->right - dst->left, dst->bottom - dst->top,
src->left - surface->rect.left, surface->rect.bottom - src->bottom,
0, surface->rect.bottom - surface->rect.top,
bits, info, DIB_RGB_COLORS );
surface->funcs->unlock( surface );
NtUserReleaseDC( hwnd, hdc );
}
/***********************************************************************
* move_window_bits
*
* Move the window bits when a window is resized or its surface recreated.
*/
void move_window_bits( HWND hwnd, struct window_surface *old_surface,
struct window_surface *new_surface,
const RECT *visible_rect, const RECT *old_visible_rect,
const RECT *window_rect, const RECT *valid_rects )
{
RECT dst = valid_rects[0];
RECT src = valid_rects[1];
if (new_surface != old_surface ||
src.left - old_visible_rect->left != dst.left - visible_rect->left ||
src.top - old_visible_rect->top != dst.top - visible_rect->top)
{
TRACE( "copying %s -> %s\n", wine_dbgstr_rect( &src ), wine_dbgstr_rect( &dst ));
OffsetRect( &src, -old_visible_rect->left, -old_visible_rect->top );
OffsetRect( &dst, -window_rect->left, -window_rect->top );
copy_bits_from_surface( hwnd, old_surface, &dst, &src );
}
}
/***********************************************************************
* move_window_bits_parent
*
* Move the window bits in the parent surface when a child is moved.
*/
void move_window_bits_parent( HWND hwnd, HWND parent, const RECT *window_rect, const RECT *valid_rects )
{
struct window_surface *surface;
RECT dst = valid_rects[0];
RECT src = valid_rects[1];
WND *win;
if (src.left == dst.left && src.top == dst.top) return;
if (!(win = WIN_GetPtr( parent ))) return;
if (win == WND_DESKTOP || win == WND_OTHER_PROCESS) return;
if (!(surface = win->surface))
{
WIN_ReleasePtr( win );
return;
}
TRACE( "copying %s -> %s\n", wine_dbgstr_rect( &src ), wine_dbgstr_rect( &dst ));
MapWindowPoints( NtUserGetAncestor( hwnd, GA_PARENT ), parent, (POINT *)&src, 2 );
OffsetRect( &src, win->client_rect.left - win->visible_rect.left,
win->client_rect.top - win->visible_rect.top );
OffsetRect( &dst, -window_rect->left, -window_rect->top );
window_surface_add_ref( surface );
WIN_ReleasePtr( win );
copy_bits_from_surface( hwnd, surface, &dst, &src );
window_surface_release( surface );
}
/*************************************************************************
* fix_caret
*
* Helper for ScrollWindowEx:
* If the return value is 0, no special caret handling is necessary.
* Otherwise the return value is the handle of the window that owns the
* caret. Its caret needs to be hidden during the scroll operation and
* moved to new_caret_pos if move_caret is TRUE.
*/
static HWND fix_caret(HWND hWnd, const RECT *scroll_rect, INT dx, INT dy,
UINT flags, LPBOOL move_caret, LPPOINT new_caret_pos)
{
GUITHREADINFO info;
RECT rect, mapped_rcCaret;
info.cbSize = sizeof(info);
if (!NtUserGetGUIThreadInfo( GetCurrentThreadId(), &info )) return 0;
if (!info.hwndCaret) return 0;
mapped_rcCaret = info.rcCaret;
if (info.hwndCaret == hWnd)
{
/* The caret needs to be moved along with scrolling even if it's
* outside the visible area. Otherwise, when the caret is scrolled
* out from the view, the position won't get updated anymore and
* the caret will never scroll back again. */
*move_caret = TRUE;
new_caret_pos->x = info.rcCaret.left + dx;
new_caret_pos->y = info.rcCaret.top + dy;
}
else
{
*move_caret = FALSE;
if (!(flags & SW_SCROLLCHILDREN) || !IsChild(hWnd, info.hwndCaret))
return 0;
MapWindowPoints(info.hwndCaret, hWnd, (LPPOINT)&mapped_rcCaret, 2);
}
/* If the caret is not in the src/dest rects, all is fine done. */
if (!IntersectRect(&rect, scroll_rect, &mapped_rcCaret))
{
rect = *scroll_rect;
OffsetRect(&rect, dx, dy);
if (!IntersectRect(&rect, &rect, &mapped_rcCaret))
return 0;
}
/* Indicate that the caret needs to be updated during the scrolling. */
return info.hwndCaret;
}
/***********************************************************************
* GetDC (USER32.@)
*
* Get a device context.
*
* RETURNS
* Success: Handle to the device context
* Failure: NULL.
*/
HDC WINAPI GetDC( HWND hwnd )
{
if (!hwnd) return NtUserGetDCEx( 0, 0, DCX_CACHE | DCX_WINDOW );
return NtUserGetDCEx( hwnd, 0, DCX_USESTYLE );
}
/***********************************************************************
* GetWindowDC (USER32.@)
*/
HDC WINAPI GetWindowDC( HWND hwnd )
{
return NtUserGetDCEx( hwnd, 0, DCX_USESTYLE | DCX_WINDOW );
}
/***********************************************************************
* LockWindowUpdate (USER32.@)
*
* Enables or disables painting in the chosen window.
*
* PARAMS
* hwnd [I] handle to a window.
*
* RETURNS
* If successful, returns nonzero value. Otherwise,
* returns 0.
*
* NOTES
* You can lock only one window at a time.
*/
BOOL WINAPI LockWindowUpdate( HWND hwnd )
{
static HWND lockedWnd;
FIXME("(%p), partial stub!\n",hwnd);
USER_Lock();
if (lockedWnd)
{
if (!hwnd)
{
/* Unlock lockedWnd */
/* FIXME: Do something */
}
else
{
/* Attempted to lock a second window */
/* Return FALSE and do nothing */
USER_Unlock();
return FALSE;
}
}
lockedWnd = hwnd;
USER_Unlock();
return TRUE;
}
/***********************************************************************
* UpdateWindow (USER32.@)
*/
BOOL WINAPI UpdateWindow( HWND hwnd )
{
if (!hwnd)
{
SetLastError( ERROR_INVALID_WINDOW_HANDLE );
return FALSE;
}
return NtUserRedrawWindow( hwnd, NULL, 0, RDW_UPDATENOW | RDW_ALLCHILDREN );
}
/***********************************************************************
* InvalidateRgn (USER32.@)
*/
BOOL WINAPI InvalidateRgn( HWND hwnd, HRGN hrgn, BOOL erase )
{
if (!hwnd)
{
SetLastError( ERROR_INVALID_WINDOW_HANDLE );
return FALSE;
}
return NtUserRedrawWindow( hwnd, NULL, hrgn, RDW_INVALIDATE | (erase ? RDW_ERASE : 0) );
}
/***********************************************************************
* InvalidateRect (USER32.@)
*
* MSDN: if hwnd parameter is NULL, InvalidateRect invalidates and redraws
* all windows and sends WM_ERASEBKGND and WM_NCPAINT.
*/
BOOL WINAPI InvalidateRect( HWND hwnd, const RECT *rect, BOOL erase )
{
UINT flags = RDW_INVALIDATE | (erase ? RDW_ERASE : 0);
if (!hwnd)
{
flags = RDW_ALLCHILDREN | RDW_INVALIDATE | RDW_FRAME | RDW_ERASE | RDW_ERASENOW;
rect = NULL;
}
return NtUserRedrawWindow( hwnd, rect, 0, flags );
}
/***********************************************************************
* ValidateRgn (USER32.@)
*/
BOOL WINAPI ValidateRgn( HWND hwnd, HRGN hrgn )
{
if (!hwnd)
{
SetLastError( ERROR_INVALID_WINDOW_HANDLE );
return FALSE;
}
return NtUserRedrawWindow( hwnd, NULL, hrgn, RDW_VALIDATE );
}
/***********************************************************************
* ValidateRect (USER32.@)
*
* MSDN: if hwnd parameter is NULL, ValidateRect invalidates and redraws
* all windows and sends WM_ERASEBKGND and WM_NCPAINT.
*/
BOOL WINAPI ValidateRect( HWND hwnd, const RECT *rect )
{
UINT flags = RDW_VALIDATE;
if (!hwnd)
{
flags = RDW_ALLCHILDREN | RDW_INVALIDATE | RDW_FRAME | RDW_ERASE | RDW_ERASENOW;
rect = NULL;
}
return NtUserRedrawWindow( hwnd, rect, 0, flags );
}
/***********************************************************************
* ExcludeUpdateRgn (USER32.@)
*/
INT WINAPI ExcludeUpdateRgn( HDC hdc, HWND hwnd )
{
HRGN update_rgn = CreateRectRgn( 0, 0, 0, 0 );
INT ret = NtUserGetUpdateRgn( hwnd, update_rgn, FALSE );
if (ret != ERROR)
{
DPI_AWARENESS_CONTEXT context;
POINT pt;
context = SetThreadDpiAwarenessContext( GetWindowDpiAwarenessContext( hwnd ));
GetDCOrgEx( hdc, &pt );
MapWindowPoints( 0, hwnd, &pt, 1 );
OffsetRgn( update_rgn, -pt.x, -pt.y );
ret = ExtSelectClipRgn( hdc, update_rgn, RGN_DIFF );
SetThreadDpiAwarenessContext( context );
}
DeleteObject( update_rgn );
return ret;
}
static INT scroll_window( HWND hwnd, INT dx, INT dy, const RECT *rect, const RECT *clipRect,
HRGN hrgnUpdate, LPRECT rcUpdate, UINT flags, BOOL is_ex )
{
INT retVal = NULLREGION;
BOOL bOwnRgn = TRUE;
BOOL bUpdate = (rcUpdate || hrgnUpdate || flags & (SW_INVALIDATE | SW_ERASE));
int rdw_flags;
HRGN hrgnTemp;
HRGN hrgnWinupd = 0;
HDC hDC;
RECT rc, cliprc;
HWND hwndCaret = NULL;
BOOL moveCaret = FALSE;
POINT newCaretPos;
TRACE( "%p, %d,%d hrgnUpdate=%p rcUpdate = %p %s %04x\n",
hwnd, dx, dy, hrgnUpdate, rcUpdate, wine_dbgstr_rect(rect), flags );
TRACE( "clipRect = %s\n", wine_dbgstr_rect(clipRect));
if( flags & ~( SW_SCROLLCHILDREN | SW_INVALIDATE | SW_ERASE))
FIXME("some flags (%04x) are unhandled\n", flags);
rdw_flags = (flags & SW_ERASE) && (flags & SW_INVALIDATE) ?
RDW_INVALIDATE | RDW_ERASE : RDW_INVALIDATE ;
if (!WIN_IsWindowDrawable( hwnd, TRUE )) return ERROR;
hwnd = WIN_GetFullHandle( hwnd );
GetClientRect(hwnd, &rc);
if (clipRect) IntersectRect(&cliprc,&rc,clipRect);
else cliprc = rc;
if (rect) IntersectRect(&rc, &rc, rect);
if( hrgnUpdate ) bOwnRgn = FALSE;
else if( bUpdate ) hrgnUpdate = CreateRectRgn( 0, 0, 0, 0 );
newCaretPos.x = newCaretPos.y = 0;
if( !IsRectEmpty(&cliprc) && (dx || dy)) {
DWORD dcxflags = 0;
DWORD style = GetWindowLongW( hwnd, GWL_STYLE );
hwndCaret = fix_caret(hwnd, &rc, dx, dy, flags, &moveCaret, &newCaretPos);
if (hwndCaret)
HideCaret(hwndCaret);
if (is_ex) dcxflags |= DCX_CACHE;
if( style & WS_CLIPSIBLINGS) dcxflags |= DCX_CLIPSIBLINGS;
if( GetClassLongW( hwnd, GCL_STYLE ) & CS_PARENTDC)
dcxflags |= DCX_PARENTCLIP;
if( !(flags & SW_SCROLLCHILDREN) && (style & WS_CLIPCHILDREN))
dcxflags |= DCX_CLIPCHILDREN;
hDC = NtUserGetDCEx( hwnd, 0, dcxflags);
if (hDC)
{
NtUserScrollDC( hDC, dx, dy, &rc, &cliprc, hrgnUpdate, rcUpdate );
NtUserReleaseDC( hwnd, hDC );
if (!bUpdate)
NtUserRedrawWindow( hwnd, NULL, hrgnUpdate, rdw_flags);
}
/* If the windows has an update region, this must be
* scrolled as well. Keep a copy in hrgnWinupd
* to be added to hrngUpdate at the end. */
hrgnTemp = CreateRectRgn( 0, 0, 0, 0 );
retVal = NtUserGetUpdateRgn( hwnd, hrgnTemp, FALSE );
if (retVal != NULLREGION)
{
HRGN hrgnClip = CreateRectRgnIndirect(&cliprc);
if( !bOwnRgn) {
hrgnWinupd = CreateRectRgn( 0, 0, 0, 0);
CombineRgn( hrgnWinupd, hrgnTemp, 0, RGN_COPY);
}
OffsetRgn( hrgnTemp, dx, dy );
CombineRgn( hrgnTemp, hrgnTemp, hrgnClip, RGN_AND );
if( !bOwnRgn)
CombineRgn( hrgnWinupd, hrgnWinupd, hrgnTemp, RGN_OR );
NtUserRedrawWindow( hwnd, NULL, hrgnTemp, rdw_flags);
/* Catch the case where the scrolling amount exceeds the size of the
* original window. This generated a second update area that is the
* location where the original scrolled content would end up.
* This second region is not returned by the ScrollDC and sets
* ScrollWindowEx apart from just a ScrollDC.
*
* This has been verified with testing on windows.
*/
if (abs(dx) > abs(rc.right - rc.left) ||
abs(dy) > abs(rc.bottom - rc.top))
{
SetRectRgn( hrgnTemp, rc.left + dx, rc.top + dy, rc.right+dx, rc.bottom + dy);
CombineRgn( hrgnTemp, hrgnTemp, hrgnClip, RGN_AND );
CombineRgn( hrgnUpdate, hrgnUpdate, hrgnTemp, RGN_OR );
if (rcUpdate)
{
RECT rcTemp;
GetRgnBox( hrgnTemp, &rcTemp );
UnionRect( rcUpdate, rcUpdate, &rcTemp );
}
if( !bOwnRgn)
CombineRgn( hrgnWinupd, hrgnWinupd, hrgnTemp, RGN_OR );
}
DeleteObject( hrgnClip );
}
DeleteObject( hrgnTemp );
} else {
/* nothing was scrolled */
if( !bOwnRgn)
SetRectRgn( hrgnUpdate, 0, 0, 0, 0 );
SetRectEmpty( rcUpdate);
}
if( flags & SW_SCROLLCHILDREN )
{
HWND *list = WIN_ListChildren( hwnd );
if (list)
{
int i;
RECT r, dummy;
for (i = 0; list[i]; i++)
{
WIN_GetRectangles( list[i], COORDS_PARENT, &r, NULL );
if (!rect || IntersectRect(&dummy, &r, rect))
NtUserSetWindowPos( list[i], 0, r.left + dx, r.top + dy, 0, 0,
SWP_NOZORDER | SWP_NOSIZE | SWP_NOACTIVATE |
SWP_NOREDRAW | SWP_DEFERERASE );
}
HeapFree( GetProcessHeap(), 0, list );
}
}
if( flags & (SW_INVALIDATE | SW_ERASE) )
NtUserRedrawWindow( hwnd, NULL, hrgnUpdate, rdw_flags |
((flags & SW_SCROLLCHILDREN) ? RDW_ALLCHILDREN : 0 ) );
if( hrgnWinupd) {
CombineRgn( hrgnUpdate, hrgnUpdate, hrgnWinupd, RGN_OR);
DeleteObject( hrgnWinupd);
}
if( moveCaret )
SetCaretPos( newCaretPos.x, newCaretPos.y );
if( hwndCaret )
ShowCaret( hwndCaret );
if( bOwnRgn && hrgnUpdate ) DeleteObject( hrgnUpdate );
return retVal;
}
/*************************************************************************
* ScrollWindowEx (USER32.@)
*
* Note: contrary to what the doc says, pixels that are scrolled from the
* outside of clipRect to the inside are NOT painted.
*
*/
INT WINAPI ScrollWindowEx( HWND hwnd, INT dx, INT dy,
const RECT *rect, const RECT *clipRect,
HRGN hrgnUpdate, LPRECT rcUpdate,
UINT flags )
{
return scroll_window( hwnd, dx, dy, rect, clipRect, hrgnUpdate, rcUpdate, flags, TRUE );
}
/*************************************************************************
* ScrollWindow (USER32.@)
*
*/
BOOL WINAPI ScrollWindow( HWND hwnd, INT dx, INT dy,
const RECT *rect, const RECT *clipRect )
{
return scroll_window( hwnd, dx, dy, rect, clipRect, 0, NULL,
SW_INVALIDATE | SW_ERASE | (rect ? 0 : SW_SCROLLCHILDREN), FALSE ) != ERROR;
}
/************************************************************************
* PrintWindow (USER32.@)
*
*/
BOOL WINAPI PrintWindow(HWND hwnd, HDC hdcBlt, UINT nFlags)
{
UINT flags = PRF_CHILDREN | PRF_ERASEBKGND | PRF_OWNED | PRF_CLIENT;
if(!(nFlags & PW_CLIENTONLY))
{
flags |= PRF_NONCLIENT;
}
SendMessageW(hwnd, WM_PRINT, (WPARAM)hdcBlt, flags);
return TRUE;
}
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