571 lines
15 KiB
C
571 lines
15 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
|
|
*/
|
|
|
|
#include <stdarg.h>
|
|
#include <stdlib.h>
|
|
#include "windef.h"
|
|
#include "winbase.h"
|
|
#include "wingdi.h"
|
|
#include "gdi_private.h"
|
|
#include "wine/debug.h"
|
|
|
|
WINE_DEFAULT_DEBUG_CHANNEL(clipping);
|
|
|
|
|
|
/* return the DC visible rectangle if not empty */
|
|
static inline BOOL get_dc_visrect( DC *dc, RECT *rect )
|
|
{
|
|
if (dc->header.type != OBJ_MEMDC) return FALSE;
|
|
rect->left = 0;
|
|
rect->top = 0;
|
|
rect->right = dc->vis_rect.right - dc->vis_rect.left;
|
|
rect->bottom = dc->vis_rect.bottom - dc->vis_rect.top;
|
|
return TRUE;
|
|
}
|
|
|
|
/***********************************************************************
|
|
* get_clip_rect
|
|
*
|
|
* Compute a clip rectangle from its logical coordinates.
|
|
*/
|
|
static inline RECT get_clip_rect( DC * dc, int left, int top, int right, int bottom )
|
|
{
|
|
RECT rect;
|
|
|
|
rect.left = left;
|
|
rect.top = top;
|
|
rect.right = right;
|
|
rect.bottom = bottom;
|
|
LPtoDP( dc->hSelf, (POINT *)&rect, 2 );
|
|
if (dc->layout & LAYOUT_RTL)
|
|
{
|
|
int tmp = rect.left;
|
|
rect.left = rect.right + 1;
|
|
rect.right = tmp + 1;
|
|
}
|
|
return rect;
|
|
}
|
|
|
|
/***********************************************************************
|
|
* clip_visrect
|
|
*
|
|
* Clip a rectangle to the DC visible rect.
|
|
*/
|
|
BOOL clip_visrect( DC *dc, RECT *dst, const RECT *src )
|
|
{
|
|
RECT clip;
|
|
|
|
if (get_dc_visrect( dc, &clip )) intersect_rect( dst, src, &clip );
|
|
else *dst = *src;
|
|
|
|
if (GetRgnBox( get_dc_region(dc), &clip )) intersect_rect( dst, dst, &clip );
|
|
return !is_rect_empty( dst );
|
|
}
|
|
|
|
/***********************************************************************
|
|
* update_dc_clipping
|
|
*
|
|
* Update the DC and device clip regions when the ClipRgn or VisRgn have changed.
|
|
*/
|
|
void update_dc_clipping( DC * dc )
|
|
{
|
|
PHYSDEV physdev = GET_DC_PHYSDEV( dc, pSetDeviceClipping );
|
|
HRGN regions[3];
|
|
int count = 0;
|
|
|
|
if (dc->hVisRgn) regions[count++] = dc->hVisRgn;
|
|
if (dc->hClipRgn) regions[count++] = dc->hClipRgn;
|
|
if (dc->hMetaRgn) regions[count++] = dc->hMetaRgn;
|
|
|
|
if (count > 1)
|
|
{
|
|
if (!dc->region) dc->region = CreateRectRgn( 0, 0, 0, 0 );
|
|
CombineRgn( dc->region, regions[0], regions[1], RGN_AND );
|
|
if (count > 2) CombineRgn( dc->region, dc->region, regions[2], RGN_AND );
|
|
}
|
|
else /* only one region, we don't need the total region */
|
|
{
|
|
if (dc->region) DeleteObject( dc->region );
|
|
dc->region = 0;
|
|
}
|
|
physdev->funcs->pSetDeviceClipping( physdev, get_dc_region( dc ));
|
|
}
|
|
|
|
/***********************************************************************
|
|
* create_default_clip_region
|
|
*
|
|
* Create a default clipping region when none already exists.
|
|
*/
|
|
static inline void create_default_clip_region( DC * dc )
|
|
{
|
|
RECT rect;
|
|
|
|
if (!get_dc_visrect( dc, &rect ))
|
|
{
|
|
rect.left = 0;
|
|
rect.top = 0;
|
|
rect.right = GetDeviceCaps( dc->hSelf, DESKTOPHORZRES );
|
|
rect.bottom = GetDeviceCaps( dc->hSelf, DESKTOPVERTRES );
|
|
}
|
|
dc->hClipRgn = CreateRectRgnIndirect( &rect );
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* null driver fallback implementations
|
|
*/
|
|
|
|
INT nulldrv_ExtSelectClipRgn( PHYSDEV dev, HRGN rgn, INT mode )
|
|
{
|
|
DC *dc = get_nulldrv_dc( dev );
|
|
INT ret;
|
|
|
|
if (!rgn)
|
|
{
|
|
if (mode != RGN_COPY)
|
|
{
|
|
FIXME("Unimplemented: hrgn NULL in mode: %d\n", mode);
|
|
return ERROR;
|
|
}
|
|
if (dc->hClipRgn) DeleteObject( dc->hClipRgn );
|
|
dc->hClipRgn = 0;
|
|
ret = SIMPLEREGION;
|
|
}
|
|
else
|
|
{
|
|
HRGN mirrored = 0;
|
|
|
|
if (dc->layout & LAYOUT_RTL)
|
|
{
|
|
if (!(mirrored = CreateRectRgn( 0, 0, 0, 0 ))) return ERROR;
|
|
mirror_region( mirrored, rgn, dc->vis_rect.right - dc->vis_rect.left );
|
|
rgn = mirrored;
|
|
}
|
|
|
|
if (!dc->hClipRgn)
|
|
create_default_clip_region( dc );
|
|
|
|
if (mode == RGN_COPY)
|
|
ret = CombineRgn( dc->hClipRgn, rgn, 0, mode );
|
|
else
|
|
ret = CombineRgn( dc->hClipRgn, dc->hClipRgn, rgn, mode);
|
|
|
|
if (mirrored) DeleteObject( mirrored );
|
|
}
|
|
update_dc_clipping( dc );
|
|
return ret;
|
|
}
|
|
|
|
INT nulldrv_ExcludeClipRect( PHYSDEV dev, INT left, INT top, INT right, INT bottom )
|
|
{
|
|
DC *dc = get_nulldrv_dc( dev );
|
|
RECT rect = get_clip_rect( dc, left, top, right, bottom );
|
|
INT ret;
|
|
HRGN rgn;
|
|
|
|
if (!(rgn = CreateRectRgnIndirect( &rect ))) return ERROR;
|
|
if (!dc->hClipRgn) create_default_clip_region( dc );
|
|
ret = CombineRgn( dc->hClipRgn, dc->hClipRgn, rgn, RGN_DIFF );
|
|
DeleteObject( rgn );
|
|
if (ret != ERROR) update_dc_clipping( dc );
|
|
return ret;
|
|
}
|
|
|
|
INT nulldrv_IntersectClipRect( PHYSDEV dev, INT left, INT top, INT right, INT bottom )
|
|
{
|
|
DC *dc = get_nulldrv_dc( dev );
|
|
RECT rect = get_clip_rect( dc, left, top, right, bottom );
|
|
INT ret;
|
|
HRGN rgn;
|
|
|
|
if (!dc->hClipRgn)
|
|
{
|
|
dc->hClipRgn = CreateRectRgnIndirect( &rect );
|
|
ret = SIMPLEREGION;
|
|
}
|
|
else
|
|
{
|
|
if (!(rgn = CreateRectRgnIndirect( &rect ))) return ERROR;
|
|
ret = CombineRgn( dc->hClipRgn, dc->hClipRgn, rgn, RGN_AND );
|
|
DeleteObject( rgn );
|
|
}
|
|
if (ret != ERROR) update_dc_clipping( dc );
|
|
return ret;
|
|
}
|
|
|
|
INT nulldrv_OffsetClipRgn( PHYSDEV dev, INT x, INT y )
|
|
{
|
|
DC *dc = get_nulldrv_dc( dev );
|
|
INT ret = NULLREGION;
|
|
|
|
if (dc->hClipRgn)
|
|
{
|
|
x = MulDiv( x, dc->vportExtX, dc->wndExtX );
|
|
y = MulDiv( y, dc->vportExtY, dc->wndExtY );
|
|
if (dc->layout & LAYOUT_RTL) x = -x;
|
|
ret = OffsetRgn( dc->hClipRgn, x, y );
|
|
update_dc_clipping( dc );
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* SelectClipRgn (GDI32.@)
|
|
*/
|
|
INT WINAPI SelectClipRgn( HDC hdc, HRGN hrgn )
|
|
{
|
|
return ExtSelectClipRgn( hdc, hrgn, RGN_COPY );
|
|
}
|
|
|
|
|
|
/******************************************************************************
|
|
* ExtSelectClipRgn [GDI32.@]
|
|
*/
|
|
INT WINAPI ExtSelectClipRgn( HDC hdc, HRGN hrgn, INT fnMode )
|
|
{
|
|
INT retval = ERROR;
|
|
DC * dc = get_dc_ptr( hdc );
|
|
|
|
TRACE("%p %p %d\n", hdc, hrgn, fnMode );
|
|
|
|
if (dc)
|
|
{
|
|
PHYSDEV physdev = GET_DC_PHYSDEV( dc, pExtSelectClipRgn );
|
|
update_dc( dc );
|
|
retval = physdev->funcs->pExtSelectClipRgn( physdev, hrgn, fnMode );
|
|
release_dc_ptr( dc );
|
|
}
|
|
return retval;
|
|
}
|
|
|
|
/***********************************************************************
|
|
* __wine_set_visible_region (GDI32.@)
|
|
*/
|
|
void CDECL __wine_set_visible_region( HDC hdc, HRGN hrgn, const RECT *vis_rect )
|
|
{
|
|
DC * dc;
|
|
|
|
if (!(dc = get_dc_ptr( hdc ))) return;
|
|
|
|
TRACE( "%p %p %s\n", hdc, hrgn, wine_dbgstr_rect(vis_rect) );
|
|
|
|
/* map region to DC coordinates */
|
|
OffsetRgn( hrgn, -vis_rect->left, -vis_rect->top );
|
|
|
|
if (dc->hVisRgn) DeleteObject( dc->hVisRgn );
|
|
dc->dirty = 0;
|
|
dc->vis_rect = *vis_rect;
|
|
dc->hVisRgn = hrgn;
|
|
DC_UpdateXforms( dc );
|
|
update_dc_clipping( dc );
|
|
release_dc_ptr( dc );
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* OffsetClipRgn (GDI32.@)
|
|
*/
|
|
INT WINAPI OffsetClipRgn( HDC hdc, INT x, INT y )
|
|
{
|
|
INT ret = ERROR;
|
|
DC *dc = get_dc_ptr( hdc );
|
|
|
|
TRACE("%p %d,%d\n", hdc, x, y );
|
|
|
|
if (dc)
|
|
{
|
|
PHYSDEV physdev = GET_DC_PHYSDEV( dc, pOffsetClipRgn );
|
|
update_dc( dc );
|
|
ret = physdev->funcs->pOffsetClipRgn( physdev, x, y );
|
|
release_dc_ptr( dc );
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* ExcludeClipRect (GDI32.@)
|
|
*/
|
|
INT WINAPI ExcludeClipRect( HDC hdc, INT left, INT top,
|
|
INT right, INT bottom )
|
|
{
|
|
INT ret = ERROR;
|
|
DC *dc = get_dc_ptr( hdc );
|
|
|
|
TRACE("%p %d,%d-%d,%d\n", hdc, left, top, right, bottom );
|
|
|
|
if (dc)
|
|
{
|
|
PHYSDEV physdev = GET_DC_PHYSDEV( dc, pExcludeClipRect );
|
|
update_dc( dc );
|
|
ret = physdev->funcs->pExcludeClipRect( physdev, left, top, right, bottom );
|
|
release_dc_ptr( dc );
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* IntersectClipRect (GDI32.@)
|
|
*/
|
|
INT WINAPI IntersectClipRect( HDC hdc, INT left, INT top, INT right, INT bottom )
|
|
{
|
|
INT ret = ERROR;
|
|
DC *dc = get_dc_ptr( hdc );
|
|
|
|
TRACE("%p %d,%d - %d,%d\n", hdc, left, top, right, bottom );
|
|
|
|
if (dc)
|
|
{
|
|
PHYSDEV physdev = GET_DC_PHYSDEV( dc, pIntersectClipRect );
|
|
update_dc( dc );
|
|
ret = physdev->funcs->pIntersectClipRect( physdev, left, top, right, bottom );
|
|
release_dc_ptr( dc );
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* PtVisible (GDI32.@)
|
|
*/
|
|
BOOL WINAPI PtVisible( HDC hdc, INT x, INT y )
|
|
{
|
|
POINT pt;
|
|
RECT visrect;
|
|
BOOL ret;
|
|
DC *dc = get_dc_ptr( hdc );
|
|
|
|
TRACE("%p %d,%d\n", hdc, x, y );
|
|
if (!dc) return FALSE;
|
|
|
|
pt.x = x;
|
|
pt.y = y;
|
|
LPtoDP( hdc, &pt, 1 );
|
|
update_dc( dc );
|
|
ret = (!get_dc_visrect( dc, &visrect ) ||
|
|
(pt.x >= visrect.left && pt.x < visrect.right &&
|
|
pt.y >= visrect.top && pt.y < visrect.bottom));
|
|
if (ret && get_dc_region( dc )) ret = PtInRegion( get_dc_region( dc ), pt.x, pt.y );
|
|
release_dc_ptr( dc );
|
|
return ret;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* RectVisible (GDI32.@)
|
|
*/
|
|
BOOL WINAPI RectVisible( HDC hdc, const RECT* rect )
|
|
{
|
|
RECT tmpRect, visrect;
|
|
BOOL ret;
|
|
DC *dc = get_dc_ptr( hdc );
|
|
if (!dc) return FALSE;
|
|
TRACE("%p %s\n", hdc, wine_dbgstr_rect( rect ));
|
|
|
|
tmpRect = *rect;
|
|
LPtoDP( hdc, (POINT *)&tmpRect, 2 );
|
|
|
|
update_dc( dc );
|
|
ret = (!get_dc_visrect( dc, &visrect ) || intersect_rect( &visrect, &visrect, &tmpRect ));
|
|
if (ret && get_dc_region( dc )) ret = RectInRegion( get_dc_region( dc ), &tmpRect );
|
|
release_dc_ptr( dc );
|
|
return ret;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* GetClipBox (GDI32.@)
|
|
*/
|
|
INT WINAPI GetClipBox( HDC hdc, LPRECT rect )
|
|
{
|
|
RECT visrect;
|
|
INT ret;
|
|
DC *dc = get_dc_ptr( hdc );
|
|
if (!dc) return ERROR;
|
|
|
|
update_dc( dc );
|
|
if (get_dc_region( dc ))
|
|
{
|
|
ret = GetRgnBox( get_dc_region( dc ), rect );
|
|
if (get_dc_visrect( dc, &visrect ) && !intersect_rect( rect, rect, &visrect ))
|
|
ret = NULLREGION;
|
|
}
|
|
else
|
|
{
|
|
ret = is_rect_empty( &dc->vis_rect ) ? ERROR : SIMPLEREGION;
|
|
*rect = dc->vis_rect;
|
|
}
|
|
|
|
if (dc->layout & LAYOUT_RTL)
|
|
{
|
|
int tmp = rect->left;
|
|
rect->left = rect->right - 1;
|
|
rect->right = tmp - 1;
|
|
}
|
|
DPtoLP( hdc, (LPPOINT)rect, 2 );
|
|
release_dc_ptr( dc );
|
|
TRACE("%p => %d %s\n", hdc, ret, wine_dbgstr_rect( rect ));
|
|
return ret;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* GetClipRgn (GDI32.@)
|
|
*/
|
|
INT WINAPI GetClipRgn( HDC hdc, HRGN hRgn )
|
|
{
|
|
INT ret = -1;
|
|
DC * dc;
|
|
if ((dc = get_dc_ptr( hdc )))
|
|
{
|
|
if( dc->hClipRgn )
|
|
{
|
|
if( CombineRgn(hRgn, dc->hClipRgn, 0, RGN_COPY) != ERROR )
|
|
{
|
|
ret = 1;
|
|
if (dc->layout & LAYOUT_RTL)
|
|
mirror_region( hRgn, hRgn, dc->vis_rect.right - dc->vis_rect.left );
|
|
}
|
|
}
|
|
else ret = 0;
|
|
release_dc_ptr( dc );
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* GetMetaRgn (GDI32.@)
|
|
*/
|
|
INT WINAPI GetMetaRgn( HDC hdc, HRGN hRgn )
|
|
{
|
|
INT ret = 0;
|
|
DC * dc = get_dc_ptr( hdc );
|
|
|
|
if (dc)
|
|
{
|
|
if (dc->hMetaRgn && CombineRgn( hRgn, dc->hMetaRgn, 0, RGN_COPY ) != ERROR)
|
|
{
|
|
ret = 1;
|
|
if (dc->layout & LAYOUT_RTL)
|
|
mirror_region( hRgn, hRgn, dc->vis_rect.right - dc->vis_rect.left );
|
|
}
|
|
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)
|
|
{
|
|
INT ret = 1;
|
|
RECT visrect;
|
|
DC *dc = get_dc_ptr( hDC );
|
|
|
|
if (!dc) return -1;
|
|
|
|
switch (iCode)
|
|
{
|
|
case 1:
|
|
if (dc->hClipRgn) CombineRgn( hRgn, dc->hClipRgn, 0, RGN_COPY );
|
|
else ret = 0;
|
|
break;
|
|
case 2:
|
|
if (dc->hMetaRgn) CombineRgn( hRgn, dc->hMetaRgn, 0, RGN_COPY );
|
|
else ret = 0;
|
|
break;
|
|
case 3:
|
|
if (dc->hClipRgn && dc->hMetaRgn) CombineRgn( hRgn, dc->hClipRgn, dc->hMetaRgn, RGN_AND );
|
|
else if (dc->hClipRgn) CombineRgn( hRgn, dc->hClipRgn, 0, RGN_COPY );
|
|
else if (dc->hMetaRgn) CombineRgn( hRgn, dc->hMetaRgn, 0, RGN_COPY );
|
|
else ret = 0;
|
|
break;
|
|
case SYSRGN: /* == 4 */
|
|
update_dc( dc );
|
|
if (dc->hVisRgn)
|
|
CombineRgn( hRgn, dc->hVisRgn, 0, RGN_COPY );
|
|
else if (get_dc_visrect( dc, &visrect ))
|
|
SetRectRgn( hRgn, visrect.left, visrect.top, visrect.right, visrect.bottom );
|
|
else
|
|
ret = 0;
|
|
/* On Windows NT/2000, the SYSRGN returned is in screen coordinates */
|
|
if (ret && !(GetVersion() & 0x80000000)) OffsetRgn( hRgn, dc->vis_rect.left, dc->vis_rect.top );
|
|
break;
|
|
default:
|
|
WARN("Unknown code %d\n", iCode);
|
|
ret = -1;
|
|
break;
|
|
}
|
|
release_dc_ptr( dc );
|
|
return ret;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* SetMetaRgn (GDI32.@)
|
|
*/
|
|
INT WINAPI SetMetaRgn( HDC hdc )
|
|
{
|
|
INT ret;
|
|
RECT dummy;
|
|
DC *dc = get_dc_ptr( hdc );
|
|
|
|
if (!dc) return ERROR;
|
|
|
|
if (dc->hClipRgn)
|
|
{
|
|
if (dc->hMetaRgn)
|
|
{
|
|
/* the intersection becomes the new meta region */
|
|
CombineRgn( dc->hMetaRgn, dc->hMetaRgn, dc->hClipRgn, RGN_AND );
|
|
DeleteObject( dc->hClipRgn );
|
|
dc->hClipRgn = 0;
|
|
}
|
|
else
|
|
{
|
|
dc->hMetaRgn = dc->hClipRgn;
|
|
dc->hClipRgn = 0;
|
|
}
|
|
}
|
|
/* else nothing to do */
|
|
|
|
/* Note: no need to call update_dc_clipping, the overall clip region hasn't changed */
|
|
|
|
ret = GetRgnBox( dc->hMetaRgn, &dummy );
|
|
release_dc_ptr( dc );
|
|
return ret;
|
|
}
|