Sweden-Number/objects/clipping.c

620 lines
17 KiB
C

/*
* DC clipping functions
*
* Copyright 1993 Alexandre Julliard
*
* 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 <stdlib.h>
#include "windef.h"
#include "wingdi.h"
#include "wine/winuser16.h"
#include "gdi.h"
#include "region.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(clipping);
/***********************************************************************
* CLIPPING_UpdateGCRegion
*
* Update the GC clip region when the ClipRgn or VisRgn have changed.
*/
void CLIPPING_UpdateGCRegion( DC * dc )
{
if (!dc->hGCClipRgn) dc->hGCClipRgn = CreateRectRgn( 0, 0, 0, 0 );
if (!dc->hVisRgn)
{
ERR("hVisRgn is zero. Please report this.\n" );
exit(1);
}
if (dc->flags & DC_DIRTY) ERR( "DC is dirty. Please report this.\n" );
if (!dc->hClipRgn)
CombineRgn( dc->hGCClipRgn, dc->hVisRgn, 0, RGN_COPY );
else
CombineRgn(dc->hGCClipRgn, dc->hClipRgn, dc->hVisRgn, RGN_AND);
if (dc->funcs->pSetDeviceClipping) dc->funcs->pSetDeviceClipping( dc );
}
/***********************************************************************
* SelectClipRgn (GDI.44)
*/
INT16 WINAPI SelectClipRgn16( HDC16 hdc, HRGN16 hrgn )
{
return (INT16)SelectClipRgn( hdc, hrgn );
}
/***********************************************************************
* SelectClipRgn (GDI32.@)
*/
INT WINAPI SelectClipRgn( HDC hdc, HRGN hrgn )
{
return ExtSelectClipRgn( hdc, hrgn, RGN_COPY );
}
/******************************************************************************
* ExtSelectClipRgn [GDI.508]
*/
INT16 WINAPI ExtSelectClipRgn16( HDC16 hdc, HRGN16 hrgn, INT16 fnMode )
{
return (INT16) ExtSelectClipRgn((HDC) hdc, (HRGN) hrgn, fnMode);
}
/******************************************************************************
* ExtSelectClipRgn [GDI32.@]
*/
INT WINAPI ExtSelectClipRgn( HDC hdc, HRGN hrgn, INT fnMode )
{
INT retval;
DC * dc = DC_GetDCUpdate( hdc );
if (!dc) return ERROR;
TRACE("%04x %04x %d\n", hdc, hrgn, fnMode );
if (!hrgn)
{
if (fnMode == RGN_COPY)
{
if (dc->hClipRgn) DeleteObject( dc->hClipRgn );
dc->hClipRgn = 0;
retval = SIMPLEREGION; /* Clip region == whole DC */
}
else
{
FIXME("Unimplemented: hrgn NULL in mode: %d\n", fnMode);
GDI_ReleaseObj( hdc );
return ERROR;
}
}
else
{
if (!dc->hClipRgn)
{
RECT rect;
GetRgnBox( dc->hVisRgn, &rect );
dc->hClipRgn = CreateRectRgnIndirect( &rect );
}
OffsetRgn( dc->hClipRgn, -dc->DCOrgX, -dc->DCOrgY );
if(fnMode == RGN_COPY)
retval = CombineRgn( dc->hClipRgn, hrgn, 0, fnMode );
else
retval = CombineRgn( dc->hClipRgn, dc->hClipRgn, hrgn, fnMode);
OffsetRgn( dc->hClipRgn, dc->DCOrgX, dc->DCOrgY );
}
CLIPPING_UpdateGCRegion( dc );
GDI_ReleaseObj( hdc );
return retval;
}
/***********************************************************************
* SelectVisRgn (GDI.105)
*/
INT16 WINAPI SelectVisRgn16( HDC16 hdc, HRGN16 hrgn )
{
int retval;
DC * dc;
if (!hrgn) return ERROR;
if (!(dc = DC_GetDCPtr( hdc ))) return ERROR;
TRACE("%04x %04x\n", hdc, hrgn );
dc->flags &= ~DC_DIRTY;
retval = CombineRgn16( dc->hVisRgn, hrgn, 0, RGN_COPY );
CLIPPING_UpdateGCRegion( dc );
GDI_ReleaseObj( hdc );
return retval;
}
/***********************************************************************
* OffsetClipRgn (GDI.32)
*/
INT16 WINAPI OffsetClipRgn16( HDC16 hdc, INT16 x, INT16 y )
{
return (INT16)OffsetClipRgn( hdc, x, y );
}
/***********************************************************************
* OffsetClipRgn (GDI32.@)
*/
INT WINAPI OffsetClipRgn( HDC hdc, INT x, INT y )
{
INT ret = SIMPLEREGION;
DC *dc = DC_GetDCUpdate( hdc );
if (!dc) return ERROR;
TRACE("%04x %d,%d\n", hdc, x, y );
if(dc->funcs->pOffsetClipRgn)
ret = dc->funcs->pOffsetClipRgn( dc, x, y );
else if (dc->hClipRgn) {
ret = OffsetRgn( dc->hClipRgn, XLSTODS(dc,x), YLSTODS(dc,y));
CLIPPING_UpdateGCRegion( dc );
}
GDI_ReleaseObj( hdc );
return ret;
}
/***********************************************************************
* OffsetVisRgn (GDI.102)
*/
INT16 WINAPI OffsetVisRgn16( HDC16 hdc, INT16 x, INT16 y )
{
INT16 retval;
DC * dc = DC_GetDCUpdate( hdc );
if (!dc) return ERROR;
TRACE("%04x %d,%d\n", hdc, x, y );
retval = OffsetRgn( dc->hVisRgn, x, y );
CLIPPING_UpdateGCRegion( dc );
GDI_ReleaseObj( hdc );
return retval;
}
/***********************************************************************
* CLIPPING_IntersectClipRect
*
* Helper function for {Intersect,Exclude}ClipRect, can be called from
* elsewhere (like ExtTextOut()) to skip redundant metafile update and
* coordinate conversion.
*/
INT CLIPPING_IntersectClipRect( DC * dc, INT left, INT top,
INT right, INT bottom, UINT flags )
{
HRGN newRgn;
INT ret;
left += dc->DCOrgX;
right += dc->DCOrgX;
top += dc->DCOrgY;
bottom += dc->DCOrgY;
if (!(newRgn = CreateRectRgn( left, top, right, bottom ))) return ERROR;
if (!dc->hClipRgn)
{
if( flags & CLIP_INTERSECT )
{
dc->hClipRgn = newRgn;
CLIPPING_UpdateGCRegion( dc );
return SIMPLEREGION;
}
else if( flags & CLIP_EXCLUDE )
{
dc->hClipRgn = CreateRectRgn( 0, 0, 0, 0 );
CombineRgn( dc->hClipRgn, dc->hVisRgn, 0, RGN_COPY );
}
else WARN("No hClipRgn and flags are %x\n",flags);
}
ret = CombineRgn( newRgn, dc->hClipRgn, newRgn,
(flags & CLIP_EXCLUDE) ? RGN_DIFF : RGN_AND );
if (ret != ERROR)
{
if (!(flags & CLIP_KEEPRGN)) DeleteObject( dc->hClipRgn );
dc->hClipRgn = newRgn;
CLIPPING_UpdateGCRegion( dc );
}
else DeleteObject( newRgn );
return ret;
}
/***********************************************************************
* ExcludeClipRect (GDI.21)
*/
INT16 WINAPI ExcludeClipRect16( HDC16 hdc, INT16 left, INT16 top,
INT16 right, INT16 bottom )
{
return (INT16)ExcludeClipRect( hdc, left, top, right, bottom );
}
/***********************************************************************
* ExcludeClipRect (GDI32.@)
*/
INT WINAPI ExcludeClipRect( HDC hdc, INT left, INT top,
INT right, INT bottom )
{
INT ret;
DC *dc = DC_GetDCUpdate( hdc );
if (!dc) return ERROR;
TRACE("%04x %dx%d,%dx%d\n", hdc, left, top, right, bottom );
if(dc->funcs->pExcludeClipRect)
ret = dc->funcs->pExcludeClipRect( dc, left, top, right, bottom );
else {
left = XLPTODP( dc, left );
right = XLPTODP( dc, right );
top = YLPTODP( dc, top );
bottom = YLPTODP( dc, bottom );
ret = CLIPPING_IntersectClipRect( dc, left, top, right, bottom, CLIP_EXCLUDE );
}
GDI_ReleaseObj( hdc );
return ret;
}
/***********************************************************************
* IntersectClipRect (GDI.22)
*/
INT16 WINAPI IntersectClipRect16( HDC16 hdc, INT16 left, INT16 top,
INT16 right, INT16 bottom )
{
return (INT16)IntersectClipRect( hdc, left, top, right, bottom );
}
/***********************************************************************
* IntersectClipRect (GDI32.@)
*/
INT WINAPI IntersectClipRect( HDC hdc, INT left, INT top,
INT right, INT bottom )
{
INT ret;
DC *dc = DC_GetDCUpdate( hdc );
if (!dc) return ERROR;
TRACE("%04x %dx%d,%dx%d\n", hdc, left, top, right, bottom );
if(dc->funcs->pIntersectClipRect)
ret = dc->funcs->pIntersectClipRect( dc, left, top, right, bottom );
else {
left = XLPTODP( dc, left );
right = XLPTODP( dc, right );
top = YLPTODP( dc, top );
bottom = YLPTODP( dc, bottom );
ret = CLIPPING_IntersectClipRect( dc, left, top, right, bottom, CLIP_INTERSECT );
}
GDI_ReleaseObj( hdc );
return ret;
}
/***********************************************************************
* CLIPPING_IntersectVisRect
*
* Helper function for {Intersect,Exclude}VisRect, can be called from
* elsewhere (like ExtTextOut()) to skip redundant metafile update and
* coordinate conversion.
*/
INT CLIPPING_IntersectVisRect( DC * dc, INT left, INT top,
INT right, INT bottom,
BOOL exclude )
{
HRGN tempRgn, newRgn;
INT ret;
left += dc->DCOrgX;
right += dc->DCOrgX;
top += dc->DCOrgY;
bottom += dc->DCOrgY;
if (!(newRgn = CreateRectRgn( 0, 0, 0, 0 ))) return ERROR;
if (!(tempRgn = CreateRectRgn( left, top, right, bottom )))
{
DeleteObject( newRgn );
return ERROR;
}
ret = CombineRgn( newRgn, dc->hVisRgn, tempRgn,
exclude ? RGN_DIFF : RGN_AND );
DeleteObject( tempRgn );
if (ret != ERROR)
{
RGNOBJ *newObj = (RGNOBJ*)GDI_GetObjPtr( newRgn, REGION_MAGIC);
if (newObj)
{
RGNOBJ *prevObj = (RGNOBJ*)GDI_GetObjPtr( dc->hVisRgn, REGION_MAGIC);
if (prevObj)
{
newObj->header.hNext = prevObj->header.hNext;
GDI_ReleaseObj( dc->hVisRgn );
}
GDI_ReleaseObj( newRgn );
}
DeleteObject( dc->hVisRgn );
dc->hVisRgn = newRgn;
CLIPPING_UpdateGCRegion( dc );
}
else DeleteObject( newRgn );
return ret;
}
/***********************************************************************
* ExcludeVisRect (GDI.73)
*/
INT16 WINAPI ExcludeVisRect16( HDC16 hdc, INT16 left, INT16 top,
INT16 right, INT16 bottom )
{
INT16 ret;
DC * dc = DC_GetDCUpdate( hdc );
if (!dc) return ERROR;
left = XLPTODP( dc, left );
right = XLPTODP( dc, right );
top = YLPTODP( dc, top );
bottom = YLPTODP( dc, bottom );
TRACE("%04x %dx%d,%dx%d\n", hdc, left, top, right, bottom );
ret = CLIPPING_IntersectVisRect( dc, left, top, right, bottom, TRUE );
GDI_ReleaseObj( hdc );
return ret;
}
/***********************************************************************
* IntersectVisRect (GDI.98)
*/
INT16 WINAPI IntersectVisRect16( HDC16 hdc, INT16 left, INT16 top,
INT16 right, INT16 bottom )
{
INT16 ret;
DC * dc = DC_GetDCUpdate( hdc );
if (!dc) return ERROR;
left = XLPTODP( dc, left );
right = XLPTODP( dc, right );
top = YLPTODP( dc, top );
bottom = YLPTODP( dc, bottom );
TRACE("%04x %dx%d,%dx%d\n", hdc, left, top, right, bottom );
ret = CLIPPING_IntersectVisRect( dc, left, top, right, bottom, FALSE );
GDI_ReleaseObj( hdc );
return ret;
}
/***********************************************************************
* PtVisible (GDI.103)
*/
BOOL16 WINAPI PtVisible16( HDC16 hdc, INT16 x, INT16 y )
{
return PtVisible( hdc, x, y );
}
/***********************************************************************
* PtVisible (GDI32.@)
*/
BOOL WINAPI PtVisible( HDC hdc, INT x, INT y )
{
BOOL ret = FALSE;
DC *dc = DC_GetDCUpdate( hdc );
TRACE("%04x %d,%d\n", hdc, x, y );
if (!dc) return FALSE;
if (dc->hGCClipRgn)
{
ret = PtInRegion( dc->hGCClipRgn, XLPTODP(dc,x) + dc->DCOrgX,
YLPTODP(dc,y) + dc->DCOrgY );
}
GDI_ReleaseObj( hdc );
return ret;
}
/***********************************************************************
* RectVisible (GDI.465)
* RectVisibleOld (GDI.104)
*/
BOOL16 WINAPI RectVisible16( HDC16 hdc, const RECT16* rect16 )
{
RECT rect;
CONV_RECT16TO32( rect16, &rect );
return RectVisible( hdc, &rect );
}
/***********************************************************************
* RectVisible (GDI32.@)
*/
BOOL WINAPI RectVisible( HDC hdc, const RECT* rect )
{
BOOL ret = FALSE;
RECT tmpRect;
DC *dc = DC_GetDCUpdate( hdc );
if (!dc) return FALSE;
TRACE("%04x %d,%dx%d,%d\n",
hdc, rect->left, rect->top, rect->right, rect->bottom );
if (dc->hGCClipRgn)
{
/* copy rectangle to avoid overwriting by LPtoDP */
tmpRect = *rect;
LPtoDP( hdc, (LPPOINT)&tmpRect, 2 );
tmpRect.left += dc->DCOrgX;
tmpRect.right += dc->DCOrgX;
tmpRect.top += dc->DCOrgY;
tmpRect.bottom += dc->DCOrgY;
ret = RectInRegion( dc->hGCClipRgn, &tmpRect );
}
GDI_ReleaseObj( hdc );
return ret;
}
/***********************************************************************
* GetClipBox (GDI.77)
*/
INT16 WINAPI GetClipBox16( HDC16 hdc, LPRECT16 rect )
{
int ret;
DC *dc = DC_GetDCUpdate( hdc );
if (!dc) return ERROR;
ret = GetRgnBox16( dc->hGCClipRgn, rect );
rect->left -= dc->DCOrgX;
rect->right -= dc->DCOrgX;
rect->top -= dc->DCOrgY;
rect->bottom -= dc->DCOrgY;
DPtoLP16( hdc, (LPPOINT16)rect, 2 );
TRACE("%d,%d-%d,%d\n", rect->left,rect->top,rect->right,rect->bottom );
GDI_ReleaseObj( hdc );
return ret;
}
/***********************************************************************
* GetClipBox (GDI32.@)
*/
INT WINAPI GetClipBox( HDC hdc, LPRECT rect )
{
INT ret;
DC *dc = DC_GetDCUpdate( hdc );
if (!dc) return ERROR;
ret = GetRgnBox( dc->hGCClipRgn, rect );
rect->left -= dc->DCOrgX;
rect->right -= dc->DCOrgX;
rect->top -= dc->DCOrgY;
rect->bottom -= dc->DCOrgY;
DPtoLP( hdc, (LPPOINT)rect, 2 );
GDI_ReleaseObj( hdc );
return ret;
}
/***********************************************************************
* GetClipRgn (GDI32.@)
*/
INT WINAPI GetClipRgn( HDC hdc, HRGN hRgn )
{
INT ret = -1;
DC * dc;
if (hRgn && (dc = DC_GetDCPtr( hdc )))
{
if( dc->hClipRgn )
{
/* this assumes that dc->hClipRgn is in coordinates
relative to the device (not DC origin) */
if( CombineRgn(hRgn, dc->hClipRgn, 0, RGN_COPY) != ERROR )
{
OffsetRgn( hRgn, -dc->DCOrgX, -dc->DCOrgY );
ret = 1;
}
}
else ret = 0;
GDI_ReleaseObj( hdc );
}
return ret;
}
/***********************************************************************
* SaveVisRgn (GDI.129)
*/
HRGN16 WINAPI SaveVisRgn16( HDC16 hdc )
{
HRGN copy;
RGNOBJ *obj, *copyObj;
DC *dc = DC_GetDCUpdate( hdc );
if (!dc) return 0;
TRACE("%04x\n", hdc );
if (!(obj = (RGNOBJ *) GDI_GetObjPtr( dc->hVisRgn, REGION_MAGIC )))
{
GDI_ReleaseObj( hdc );
return 0;
}
if (!(copy = CreateRectRgn( 0, 0, 0, 0 )))
{
GDI_ReleaseObj( dc->hVisRgn );
GDI_ReleaseObj( hdc );
return 0;
}
CombineRgn( copy, dc->hVisRgn, 0, RGN_COPY );
if (!(copyObj = (RGNOBJ *) GDI_GetObjPtr( copy, REGION_MAGIC )))
{
DeleteObject( copy );
GDI_ReleaseObj( dc->hVisRgn );
GDI_ReleaseObj( hdc );
return 0;
}
copyObj->header.hNext = obj->header.hNext;
obj->header.hNext = copy;
GDI_ReleaseObj( copy );
GDI_ReleaseObj( dc->hVisRgn );
GDI_ReleaseObj( hdc );
return copy;
}
/***********************************************************************
* RestoreVisRgn (GDI.130)
*/
INT16 WINAPI RestoreVisRgn16( HDC16 hdc )
{
HRGN saved;
RGNOBJ *obj, *savedObj;
DC *dc = DC_GetDCPtr( hdc );
INT16 ret = ERROR;
if (!dc) return ERROR;
if (!dc->hVisRgn) goto done;
TRACE("%04x\n", hdc );
if (!(obj = (RGNOBJ *) GDI_GetObjPtr( dc->hVisRgn, REGION_MAGIC ))) goto done;
saved = obj->header.hNext;
GDI_ReleaseObj( dc->hVisRgn );
if (!saved || !(savedObj = (RGNOBJ *) GDI_GetObjPtr( saved, REGION_MAGIC ))) goto done;
DeleteObject( dc->hVisRgn );
dc->hVisRgn = saved;
dc->flags &= ~DC_DIRTY;
CLIPPING_UpdateGCRegion( dc );
ret = savedObj->rgn->type; /* FIXME */
GDI_ReleaseObj( saved );
done:
GDI_ReleaseObj( hdc );
return ret;
}