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657 lines
17 KiB
C
657 lines
17 KiB
C
/*
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* DC clipping functions
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*
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* Copyright 1993 Alexandre Julliard
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#include <stdarg.h>
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#include <stdlib.h>
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#include "windef.h"
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#include "winbase.h"
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#include "wingdi.h"
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#include "wownt32.h"
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#include "gdi_private.h"
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#include "wine/debug.h"
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WINE_DEFAULT_DEBUG_CHANNEL(clipping);
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/***********************************************************************
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* get_clip_region
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*
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* Return the total clip region (if any).
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*/
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static inline HRGN get_clip_region( DC * dc )
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{
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if (dc->hMetaClipRgn) return dc->hMetaClipRgn;
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if (dc->hMetaRgn) return dc->hMetaRgn;
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return dc->hClipRgn;
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}
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/***********************************************************************
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* CLIPPING_UpdateGCRegion
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*
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* Update the GC clip region when the ClipRgn or VisRgn have changed.
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*/
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void CLIPPING_UpdateGCRegion( DC * dc )
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{
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HRGN clip_rgn;
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if (!dc->hVisRgn)
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{
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ERR("hVisRgn is zero. Please report this.\n" );
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exit(1);
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}
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/* update the intersection of meta and clip regions */
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if (dc->hMetaRgn && dc->hClipRgn)
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{
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if (!dc->hMetaClipRgn) dc->hMetaClipRgn = CreateRectRgn( 0, 0, 0, 0 );
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CombineRgn( dc->hMetaClipRgn, dc->hClipRgn, dc->hMetaRgn, RGN_AND );
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clip_rgn = dc->hMetaClipRgn;
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}
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else /* only one is set, no need for an intersection */
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{
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if (dc->hMetaClipRgn) DeleteObject( dc->hMetaClipRgn );
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dc->hMetaClipRgn = 0;
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clip_rgn = dc->hMetaRgn ? dc->hMetaRgn : dc->hClipRgn;
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}
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if (dc->funcs->pSetDeviceClipping)
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dc->funcs->pSetDeviceClipping( dc->physDev, dc->hVisRgn, clip_rgn );
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}
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/***********************************************************************
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* create_default_clip_region
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*
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* Create a default clipping region when none already exists.
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*/
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static inline void create_default_clip_region( DC * dc )
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{
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UINT width, height;
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if (GDIMAGIC( dc->header.wMagic ) == MEMORY_DC_MAGIC)
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{
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BITMAP bitmap;
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GetObjectW( dc->hBitmap, sizeof(bitmap), &bitmap );
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width = bitmap.bmWidth;
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height = bitmap.bmHeight;
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}
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else
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{
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width = GetDeviceCaps( dc->hSelf, DESKTOPHORZRES );
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height = GetDeviceCaps( dc->hSelf, DESKTOPVERTRES );
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}
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dc->hClipRgn = CreateRectRgn( 0, 0, width, height );
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}
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/***********************************************************************
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* SelectClipRgn (GDI32.@)
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*/
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INT WINAPI SelectClipRgn( HDC hdc, HRGN hrgn )
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{
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return ExtSelectClipRgn( hdc, hrgn, RGN_COPY );
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}
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/******************************************************************************
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* ExtSelectClipRgn [GDI32.@]
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*/
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INT WINAPI ExtSelectClipRgn( HDC hdc, HRGN hrgn, INT fnMode )
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{
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INT retval;
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RECT rect;
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DC * dc = get_dc_ptr( hdc );
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if (!dc) return ERROR;
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TRACE("%p %p %d\n", hdc, hrgn, fnMode );
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update_dc( dc );
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if (dc->funcs->pExtSelectClipRgn)
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{
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retval = dc->funcs->pExtSelectClipRgn( dc->physDev, hrgn, fnMode );
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release_dc_ptr( dc );
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return retval;
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}
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if (!hrgn)
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{
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if (fnMode == RGN_COPY)
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{
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if (dc->hClipRgn) DeleteObject( dc->hClipRgn );
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dc->hClipRgn = 0;
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}
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else
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{
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FIXME("Unimplemented: hrgn NULL in mode: %d\n", fnMode);
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release_dc_ptr( dc );
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return ERROR;
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}
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}
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else
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{
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if (!dc->hClipRgn)
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create_default_clip_region( dc );
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if(fnMode == RGN_COPY)
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CombineRgn( dc->hClipRgn, hrgn, 0, fnMode );
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else
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CombineRgn( dc->hClipRgn, dc->hClipRgn, hrgn, fnMode);
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}
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CLIPPING_UpdateGCRegion( dc );
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release_dc_ptr( dc );
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return GetClipBox(hdc, &rect);
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}
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/***********************************************************************
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* SelectVisRgn (GDI.105)
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*/
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INT16 WINAPI SelectVisRgn16( HDC16 hdc16, HRGN16 hrgn )
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{
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int retval;
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HDC hdc = HDC_32( hdc16 );
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DC * dc;
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if (!hrgn) return ERROR;
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if (!(dc = get_dc_ptr( hdc ))) return ERROR;
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TRACE("%p %04x\n", hdc, hrgn );
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dc->dirty = 0;
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retval = CombineRgn( dc->hVisRgn, HRGN_32(hrgn), 0, RGN_COPY );
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CLIPPING_UpdateGCRegion( dc );
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release_dc_ptr( dc );
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return retval;
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}
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/***********************************************************************
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* OffsetClipRgn (GDI32.@)
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*/
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INT WINAPI OffsetClipRgn( HDC hdc, INT x, INT y )
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{
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INT ret = SIMPLEREGION;
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DC *dc = get_dc_ptr( hdc );
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if (!dc) return ERROR;
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TRACE("%p %d,%d\n", hdc, x, y );
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update_dc( dc );
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if(dc->funcs->pOffsetClipRgn)
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{
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ret = dc->funcs->pOffsetClipRgn( dc->physDev, x, y );
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/* FIXME: ret is just a success flag, we should return a proper value */
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}
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else if (dc->hClipRgn) {
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ret = OffsetRgn( dc->hClipRgn, MulDiv( x, dc->vportExtX, dc->wndExtX ),
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MulDiv( y, dc->vportExtY, dc->wndExtY ) );
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CLIPPING_UpdateGCRegion( dc );
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}
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release_dc_ptr( dc );
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return ret;
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}
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/***********************************************************************
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* OffsetVisRgn (GDI.102)
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*/
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INT16 WINAPI OffsetVisRgn16( HDC16 hdc16, INT16 x, INT16 y )
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{
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INT16 retval;
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HDC hdc = HDC_32( hdc16 );
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DC * dc = get_dc_ptr( hdc );
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if (!dc) return ERROR;
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TRACE("%p %d,%d\n", hdc, x, y );
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update_dc( dc );
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retval = OffsetRgn( dc->hVisRgn, x, y );
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CLIPPING_UpdateGCRegion( dc );
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release_dc_ptr( dc );
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return retval;
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}
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/***********************************************************************
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* ExcludeClipRect (GDI32.@)
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*/
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INT WINAPI ExcludeClipRect( HDC hdc, INT left, INT top,
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INT right, INT bottom )
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{
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HRGN newRgn;
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INT ret;
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DC *dc = get_dc_ptr( hdc );
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if (!dc) return ERROR;
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TRACE("%p %dx%d,%dx%d\n", hdc, left, top, right, bottom );
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update_dc( dc );
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if(dc->funcs->pExcludeClipRect)
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{
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ret = dc->funcs->pExcludeClipRect( dc->physDev, left, top, right, bottom );
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/* FIXME: ret is just a success flag, we should return a proper value */
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}
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else
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{
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POINT pt[2];
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pt[0].x = left;
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pt[0].y = top;
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pt[1].x = right;
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pt[1].y = bottom;
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LPtoDP( hdc, pt, 2 );
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if (!(newRgn = CreateRectRgn( pt[0].x, pt[0].y, pt[1].x, pt[1].y ))) ret = ERROR;
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else
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{
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if (!dc->hClipRgn)
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create_default_clip_region( dc );
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ret = CombineRgn( dc->hClipRgn, dc->hClipRgn, newRgn, RGN_DIFF );
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DeleteObject( newRgn );
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}
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if (ret != ERROR) CLIPPING_UpdateGCRegion( dc );
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}
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release_dc_ptr( dc );
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return ret;
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}
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/***********************************************************************
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* IntersectClipRect (GDI32.@)
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*/
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INT WINAPI IntersectClipRect( HDC hdc, INT left, INT top, INT right, INT bottom )
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{
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INT ret;
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DC *dc = get_dc_ptr( hdc );
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if (!dc) return ERROR;
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TRACE("%p %d,%d - %d,%d\n", hdc, left, top, right, bottom );
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update_dc( dc );
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if(dc->funcs->pIntersectClipRect)
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{
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ret = dc->funcs->pIntersectClipRect( dc->physDev, left, top, right, bottom );
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/* FIXME: ret is just a success flag, we should return a proper value */
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}
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else
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{
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POINT pt[2];
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pt[0].x = left;
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pt[0].y = top;
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pt[1].x = right;
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pt[1].y = bottom;
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LPtoDP( hdc, pt, 2 );
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if (!dc->hClipRgn)
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{
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dc->hClipRgn = CreateRectRgn( pt[0].x, pt[0].y, pt[1].x, pt[1].y );
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ret = SIMPLEREGION;
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}
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else
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{
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HRGN newRgn;
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if (!(newRgn = CreateRectRgn( pt[0].x, pt[0].y, pt[1].x, pt[1].y ))) ret = ERROR;
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else
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{
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ret = CombineRgn( dc->hClipRgn, dc->hClipRgn, newRgn, RGN_AND );
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DeleteObject( newRgn );
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}
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}
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if (ret != ERROR) CLIPPING_UpdateGCRegion( dc );
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}
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release_dc_ptr( dc );
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return ret;
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}
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/***********************************************************************
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* ExcludeVisRect (GDI.73)
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*/
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INT16 WINAPI ExcludeVisRect16( HDC16 hdc16, INT16 left, INT16 top, INT16 right, INT16 bottom )
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{
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HRGN tempRgn;
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INT16 ret;
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POINT pt[2];
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HDC hdc = HDC_32( hdc16 );
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DC * dc = get_dc_ptr( hdc );
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if (!dc) return ERROR;
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pt[0].x = left;
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pt[0].y = top;
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pt[1].x = right;
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pt[1].y = bottom;
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LPtoDP( hdc, pt, 2 );
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TRACE("%p %d,%d - %d,%d\n", hdc, pt[0].x, pt[0].y, pt[1].x, pt[1].y);
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if (!(tempRgn = CreateRectRgn( pt[0].x, pt[0].y, pt[1].x, pt[1].y ))) ret = ERROR;
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else
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{
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update_dc( dc );
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ret = CombineRgn( dc->hVisRgn, dc->hVisRgn, tempRgn, RGN_DIFF );
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DeleteObject( tempRgn );
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}
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if (ret != ERROR) CLIPPING_UpdateGCRegion( dc );
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release_dc_ptr( dc );
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return ret;
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}
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/***********************************************************************
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* IntersectVisRect (GDI.98)
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*/
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INT16 WINAPI IntersectVisRect16( HDC16 hdc16, INT16 left, INT16 top, INT16 right, INT16 bottom )
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{
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HRGN tempRgn;
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INT16 ret;
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POINT pt[2];
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HDC hdc = HDC_32( hdc16 );
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DC * dc = get_dc_ptr( hdc );
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if (!dc) return ERROR;
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pt[0].x = left;
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pt[0].y = top;
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pt[1].x = right;
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pt[1].y = bottom;
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LPtoDP( hdc, pt, 2 );
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TRACE("%p %d,%d - %d,%d\n", hdc, pt[0].x, pt[0].y, pt[1].x, pt[1].y);
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if (!(tempRgn = CreateRectRgn( pt[0].x, pt[0].y, pt[1].x, pt[1].y ))) ret = ERROR;
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else
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{
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update_dc( dc );
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ret = CombineRgn( dc->hVisRgn, dc->hVisRgn, tempRgn, RGN_AND );
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DeleteObject( tempRgn );
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}
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if (ret != ERROR) CLIPPING_UpdateGCRegion( dc );
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release_dc_ptr( dc );
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return ret;
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}
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/***********************************************************************
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* PtVisible (GDI32.@)
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*/
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BOOL WINAPI PtVisible( HDC hdc, INT x, INT y )
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{
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POINT pt;
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BOOL ret;
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HRGN clip;
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DC *dc = get_dc_ptr( hdc );
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TRACE("%p %d,%d\n", hdc, x, y );
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if (!dc) return FALSE;
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pt.x = x;
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pt.y = y;
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LPtoDP( hdc, &pt, 1 );
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update_dc( dc );
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ret = PtInRegion( dc->hVisRgn, pt.x, pt.y );
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if (ret && (clip = get_clip_region(dc))) ret = PtInRegion( clip, pt.x, pt.y );
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release_dc_ptr( dc );
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return ret;
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}
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/***********************************************************************
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* RectVisible (GDI32.@)
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*/
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BOOL WINAPI RectVisible( HDC hdc, const RECT* rect )
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{
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RECT tmpRect;
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BOOL ret;
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HRGN clip;
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DC *dc = get_dc_ptr( hdc );
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if (!dc) return FALSE;
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TRACE("%p %d,%dx%d,%d\n", hdc, rect->left, rect->top, rect->right, rect->bottom );
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tmpRect = *rect;
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LPtoDP( hdc, (POINT *)&tmpRect, 2 );
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update_dc( dc );
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if ((clip = get_clip_region(dc)))
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{
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HRGN hrgn = CreateRectRgn( 0, 0, 0, 0 );
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CombineRgn( hrgn, dc->hVisRgn, clip, RGN_AND );
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ret = RectInRegion( hrgn, &tmpRect );
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DeleteObject( hrgn );
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}
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else ret = RectInRegion( dc->hVisRgn, &tmpRect );
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release_dc_ptr( dc );
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return ret;
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}
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/***********************************************************************
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* GetClipBox (GDI32.@)
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*/
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INT WINAPI GetClipBox( HDC hdc, LPRECT rect )
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{
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INT ret;
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HRGN clip;
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DC *dc = get_dc_ptr( hdc );
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if (!dc) return ERROR;
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update_dc( dc );
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if ((clip = get_clip_region(dc)))
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{
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HRGN hrgn = CreateRectRgn( 0, 0, 0, 0 );
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CombineRgn( hrgn, dc->hVisRgn, clip, RGN_AND );
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ret = GetRgnBox( hrgn, rect );
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DeleteObject( hrgn );
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}
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else ret = GetRgnBox( dc->hVisRgn, rect );
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DPtoLP( hdc, (LPPOINT)rect, 2 );
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release_dc_ptr( dc );
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return ret;
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}
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/***********************************************************************
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* GetClipRgn (GDI32.@)
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*/
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INT WINAPI GetClipRgn( HDC hdc, HRGN hRgn )
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{
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INT ret = -1;
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DC * dc;
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if (hRgn && (dc = get_dc_ptr( hdc )))
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{
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if( dc->hClipRgn )
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{
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if( CombineRgn(hRgn, dc->hClipRgn, 0, RGN_COPY) != ERROR ) ret = 1;
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}
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else ret = 0;
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release_dc_ptr( dc );
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}
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return ret;
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}
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/***********************************************************************
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* GetMetaRgn (GDI32.@)
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*/
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INT WINAPI GetMetaRgn( HDC hdc, HRGN hRgn )
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{
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INT ret = 0;
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DC * dc = get_dc_ptr( hdc );
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if (dc)
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{
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if (dc->hMetaRgn && CombineRgn( hRgn, dc->hMetaRgn, 0, RGN_COPY ) != ERROR)
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ret = 1;
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release_dc_ptr( dc );
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}
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return ret;
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}
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/***********************************************************************
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* SaveVisRgn (GDI.129)
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*/
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HRGN16 WINAPI SaveVisRgn16( HDC16 hdc16 )
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{
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struct saved_visrgn *saved;
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HDC hdc = HDC_32( hdc16 );
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DC *dc = get_dc_ptr( hdc );
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if (!dc) return 0;
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TRACE("%p\n", hdc );
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update_dc( dc );
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if (!(saved = HeapAlloc( GetProcessHeap(), 0, sizeof(*saved) ))) goto error;
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if (!(saved->hrgn = CreateRectRgn( 0, 0, 0, 0 ))) goto error;
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CombineRgn( saved->hrgn, dc->hVisRgn, 0, RGN_COPY );
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saved->next = dc->saved_visrgn;
|
|
dc->saved_visrgn = saved;
|
|
release_dc_ptr( dc );
|
|
return HRGN_16(saved->hrgn);
|
|
|
|
error:
|
|
release_dc_ptr( dc );
|
|
HeapFree( GetProcessHeap(), 0, saved );
|
|
return 0;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* RestoreVisRgn (GDI.130)
|
|
*/
|
|
INT16 WINAPI RestoreVisRgn16( HDC16 hdc16 )
|
|
{
|
|
struct saved_visrgn *saved;
|
|
HDC hdc = HDC_32( hdc16 );
|
|
DC *dc = get_dc_ptr( hdc );
|
|
INT16 ret = ERROR;
|
|
|
|
if (!dc) return ERROR;
|
|
|
|
TRACE("%p\n", hdc );
|
|
|
|
if (!(saved = dc->saved_visrgn)) goto done;
|
|
|
|
ret = CombineRgn( dc->hVisRgn, saved->hrgn, 0, RGN_COPY );
|
|
dc->saved_visrgn = saved->next;
|
|
DeleteObject( saved->hrgn );
|
|
HeapFree( GetProcessHeap(), 0, saved );
|
|
CLIPPING_UpdateGCRegion( dc );
|
|
done:
|
|
release_dc_ptr( dc );
|
|
return ret;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* GetRandomRgn [GDI32.@]
|
|
*
|
|
* NOTES
|
|
* This function is documented in MSDN online for the case of
|
|
* iCode == SYSRGN (4).
|
|
*
|
|
* For iCode == 1 it should return the clip region
|
|
* 2 " " " the meta region
|
|
* 3 " " " the intersection of the clip with
|
|
* the meta region (== 'Rao' region).
|
|
*
|
|
* See http://www.codeproject.com/gdi/cliprgnguide.asp
|
|
*/
|
|
INT WINAPI GetRandomRgn(HDC hDC, HRGN hRgn, INT iCode)
|
|
{
|
|
HRGN rgn;
|
|
DC *dc = get_dc_ptr( hDC );
|
|
|
|
if (!dc) return -1;
|
|
|
|
switch (iCode)
|
|
{
|
|
case 1:
|
|
rgn = dc->hClipRgn;
|
|
break;
|
|
case 2:
|
|
rgn = dc->hMetaRgn;
|
|
break;
|
|
case 3:
|
|
rgn = dc->hMetaClipRgn;
|
|
if(!rgn) rgn = dc->hClipRgn;
|
|
if(!rgn) rgn = dc->hMetaRgn;
|
|
break;
|
|
case SYSRGN: /* == 4 */
|
|
update_dc( dc );
|
|
rgn = dc->hVisRgn;
|
|
break;
|
|
default:
|
|
WARN("Unknown code %d\n", iCode);
|
|
release_dc_ptr( dc );
|
|
return -1;
|
|
}
|
|
if (rgn) CombineRgn( hRgn, rgn, 0, RGN_COPY );
|
|
release_dc_ptr( dc );
|
|
|
|
/* On Windows NT/2000, the SYSRGN returned is in screen coordinates */
|
|
if (iCode == SYSRGN && !(GetVersion() & 0x80000000))
|
|
{
|
|
POINT org;
|
|
GetDCOrgEx( hDC, &org );
|
|
OffsetRgn( hRgn, org.x, org.y );
|
|
}
|
|
return (rgn != 0);
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* SetMetaRgn (GDI32.@)
|
|
*/
|
|
INT WINAPI SetMetaRgn( HDC hdc )
|
|
{
|
|
INT ret;
|
|
RECT dummy;
|
|
DC *dc = get_dc_ptr( hdc );
|
|
|
|
if (!dc) return ERROR;
|
|
|
|
if (dc->hMetaClipRgn)
|
|
{
|
|
/* the intersection becomes the new meta region */
|
|
DeleteObject( dc->hMetaRgn );
|
|
DeleteObject( dc->hClipRgn );
|
|
dc->hMetaRgn = dc->hMetaClipRgn;
|
|
dc->hClipRgn = 0;
|
|
dc->hMetaClipRgn = 0;
|
|
}
|
|
else if (dc->hClipRgn)
|
|
{
|
|
dc->hMetaRgn = dc->hClipRgn;
|
|
dc->hClipRgn = 0;
|
|
}
|
|
/* else nothing to do */
|
|
|
|
/* Note: no need to call CLIPPING_UpdateGCRegion, the overall clip region hasn't changed */
|
|
|
|
ret = GetRgnBox( dc->hMetaRgn, &dummy );
|
|
release_dc_ptr( dc );
|
|
return ret;
|
|
}
|