232 lines
6.8 KiB
C
232 lines
6.8 KiB
C
![]() |
/*
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* Window painting functions
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*
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* Copyright 1993, 1994, 1995, 2001 Alexandre Julliard
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* Copyright 1999 Alex Korobka
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*/
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#include <string.h>
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#include "windef.h"
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#include "wingdi.h"
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#include "wine/winuser16.h"
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#include "wine/server.h"
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#include "win.h"
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#include "dce.h"
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#include "debugtools.h"
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DEFAULT_DEBUG_CHANNEL(win);
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/***********************************************************************
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* add_paint_count
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*
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* Add an increment (normally 1 or -1) to the current paint count of a window.
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*/
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static void add_paint_count( HWND hwnd, int incr )
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{
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SERVER_START_REQ( inc_window_paint_count )
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{
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req->handle = hwnd;
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req->incr = incr;
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wine_server_call( req );
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}
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SERVER_END_REQ;
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}
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/***********************************************************************
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* copy_rgn
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*
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* copy a region, doing the right thing if the source region is 0 or 1
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*/
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static HRGN copy_rgn( HRGN hSrc )
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{
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if (hSrc > 1)
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{
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HRGN hrgn = CreateRectRgn( 0, 0, 0, 0 );
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CombineRgn( hrgn, hSrc, 0, RGN_COPY );
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return hrgn;
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}
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return hSrc;
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}
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/***********************************************************************
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* get_update_regions
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*
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* Return update regions for the whole window and for the client area.
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*/
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static void get_update_regions( WND *win, HRGN *whole_rgn, HRGN *client_rgn )
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{
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if (win->hrgnUpdate > 1)
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{
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RECT client, update;
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/* check if update rgn overlaps with nonclient area */
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GetRgnBox( win->hrgnUpdate, &update );
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client = win->rectClient;
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OffsetRect( &client, -win->rectWindow.left, -win->rectWindow.top );
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if (update.left < client.left || update.top < client.top ||
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update.right > client.right || update.bottom > client.bottom)
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{
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*whole_rgn = copy_rgn( win->hrgnUpdate );
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*client_rgn = CreateRectRgnIndirect( &client );
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if (CombineRgn( *client_rgn, *client_rgn, win->hrgnUpdate, RGN_AND ) == NULLREGION)
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{
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DeleteObject( *client_rgn );
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*client_rgn = 0;
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}
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}
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else
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{
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*whole_rgn = 0;
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*client_rgn = copy_rgn( win->hrgnUpdate );
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}
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}
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else
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{
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*client_rgn = *whole_rgn = win->hrgnUpdate; /* 0 or 1 */
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}
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}
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/***********************************************************************
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* begin_ncpaint
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*
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* Send a WM_NCPAINT message from inside BeginPaint().
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* Returns update region cropped to client rectangle (and in client coords),
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* and clears window update region and internal paint flag.
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*/
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static HRGN begin_ncpaint( HWND hwnd )
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{
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HRGN whole_rgn, client_rgn;
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WND *wnd = WIN_GetPtr( hwnd );
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if (!wnd || wnd == WND_OTHER_PROCESS) return 0;
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TRACE("hwnd %04x [%04x] ncf %i\n",
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hwnd, wnd->hrgnUpdate, wnd->flags & WIN_NEEDS_NCPAINT);
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get_update_regions( wnd, &whole_rgn, &client_rgn );
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if (whole_rgn) /* NOTE: WM_NCPAINT allows wParam to be 1 */
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{
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WIN_ReleasePtr( wnd );
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SendMessageA( hwnd, WM_NCPAINT, whole_rgn, 0 );
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if (whole_rgn > 1) DeleteObject( whole_rgn );
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/* make sure the window still exists before continuing */
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if (!(wnd = WIN_GetPtr( hwnd )) || wnd == WND_OTHER_PROCESS)
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{
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if (client_rgn > 1) DeleteObject( client_rgn );
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return 0;
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}
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}
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if (wnd->hrgnUpdate || (wnd->flags & WIN_INTERNAL_PAINT)) add_paint_count( hwnd, -1 );
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if (wnd->hrgnUpdate > 1) DeleteObject( wnd->hrgnUpdate );
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wnd->hrgnUpdate = 0;
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wnd->flags &= ~(WIN_INTERNAL_PAINT | WIN_NEEDS_NCPAINT | WIN_NEEDS_BEGINPAINT);
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if (client_rgn > 1) OffsetRgn( client_rgn, wnd->rectWindow.left - wnd->rectClient.left,
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wnd->rectWindow.top - wnd->rectClient.top );
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WIN_ReleasePtr( wnd );
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return client_rgn;
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}
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/***********************************************************************
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* BeginPaint (USER32.@)
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*/
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HDC WINAPI BeginPaint( HWND hwnd, PAINTSTRUCT *lps )
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{
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INT dcx_flags;
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BOOL bIcon;
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HRGN hrgnUpdate;
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RECT clipRect, clientRect;
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HWND full_handle;
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WND *wndPtr;
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if (!(full_handle = WIN_IsCurrentThread( hwnd )))
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{
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if (IsWindow(hwnd))
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FIXME( "window %x belongs to other thread\n", hwnd );
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return 0;
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}
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hwnd = full_handle;
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/* send WM_NCPAINT and retrieve update region */
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hrgnUpdate = begin_ncpaint( hwnd );
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if (!hrgnUpdate && !IsWindow( hwnd )) return 0;
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HideCaret( hwnd );
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bIcon = (IsIconic(hwnd) && GetClassLongA(hwnd, GCL_HICON));
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dcx_flags = DCX_INTERSECTRGN | DCX_WINDOWPAINT | DCX_USESTYLE;
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if (bIcon) dcx_flags |= DCX_WINDOW;
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if (GetClassLongA( hwnd, GCL_STYLE ) & CS_PARENTDC)
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{
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/* Don't clip the output to the update region for CS_PARENTDC window */
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if (hrgnUpdate > 1) DeleteObject( hrgnUpdate );
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hrgnUpdate = 0;
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dcx_flags &= ~DCX_INTERSECTRGN;
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}
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else
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{
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if (!hrgnUpdate) /* empty region, clip everything */
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{
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hrgnUpdate = CreateRectRgn( 0, 0, 0, 0 );
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}
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else if (hrgnUpdate == 1) /* whole client area, don't clip */
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{
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hrgnUpdate = 0;
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dcx_flags &= ~DCX_INTERSECTRGN;
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}
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}
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lps->hdc = GetDCEx( hwnd, hrgnUpdate, dcx_flags );
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/* ReleaseDC() in EndPaint() will delete the region */
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if (!lps->hdc)
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{
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WARN("GetDCEx() failed in BeginPaint(), hwnd=%04x\n", hwnd);
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DeleteObject( hrgnUpdate );
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return 0;
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}
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/* It is possible that the clip box is bigger than the window itself,
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if CS_PARENTDC flag is set. Windows never return a paint rect bigger
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than the window itself, so we need to intersect the cliprect with
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the window */
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GetClientRect( hwnd, &clientRect );
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GetClipBox( lps->hdc, &clipRect );
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LPtoDP(lps->hdc, (LPPOINT)&clipRect, 2); /* GetClipBox returns LP */
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IntersectRect(&lps->rcPaint, &clientRect, &clipRect);
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DPtoLP(lps->hdc, (LPPOINT)&lps->rcPaint, 2); /* we must return LP */
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TRACE("hdc = %x box = (%i,%i - %i,%i)\n",
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lps->hdc, lps->rcPaint.left, lps->rcPaint.top, lps->rcPaint.right, lps->rcPaint.bottom );
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if (!(wndPtr = WIN_GetPtr( hwnd )) || wndPtr == WND_OTHER_PROCESS) return 0;
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lps->fErase = !(wndPtr->flags & WIN_NEEDS_ERASEBKGND);
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wndPtr->flags &= ~WIN_NEEDS_ERASEBKGND;
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WIN_ReleasePtr( wndPtr );
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if (!lps->fErase)
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lps->fErase = !SendMessageA( hwnd, bIcon ? WM_ICONERASEBKGND : WM_ERASEBKGND,
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(WPARAM)lps->hdc, 0 );
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return lps->hdc;
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}
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/***********************************************************************
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* EndPaint (USER32.@)
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*/
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BOOL WINAPI EndPaint( HWND hwnd, const PAINTSTRUCT *lps )
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{
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ReleaseDC( hwnd, lps->hdc );
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ShowCaret( hwnd );
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return TRUE;
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}
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