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/*
* DC clipping functions
*
* Copyright 1993 Alexandre Julliard
*/
#include <stdio.h>
#include "dc.h"
#include "metafile.h"
#include "region.h"
#include "debug.h"
#define UPDATE_DIRTY_DC(dc) \
do { \
if ((dc)->hookProc && !((dc)->w.flags & (DC_SAVED | DC_MEMORY))) \
(dc)->hookProc( (dc)->hSelf, DCHC_INVALIDVISRGN, (dc)->dwHookData, 0 ); \
} while(0)
/***********************************************************************
* CLIPPING_UpdateGCRegion
*
* Update the GC clip region when the ClipRgn or VisRgn have changed.
*/
void CLIPPING_UpdateGCRegion( DC * dc )
{
if (!dc->w.hGCClipRgn) dc->w.hGCClipRgn = CreateRectRgn32( 0, 0, 0, 0 );
if (!dc->w.hVisRgn)
{
fprintf( stderr, "UpdateGCRegion: hVisRgn is zero. Please report this.\n" );
exit(1);
}
if (dc->w.flags & DC_DIRTY)
{
UPDATE_DIRTY_DC(dc);
dc->w.flags &= ~DC_DIRTY;
}
if (!dc->w.hClipRgn)
CombineRgn32( dc->w.hGCClipRgn, dc->w.hVisRgn, 0, RGN_COPY );
else
CombineRgn32(dc->w.hGCClipRgn, dc->w.hClipRgn, dc->w.hVisRgn, RGN_AND);
if (dc->funcs->pSetDeviceClipping) dc->funcs->pSetDeviceClipping( dc );
}
/***********************************************************************
* SelectClipRgn16 (GDI.44)
*/
INT16 WINAPI SelectClipRgn16( HDC16 hdc, HRGN16 hrgn )
{
return (INT16)SelectClipRgn32( hdc, hrgn );
}
/***********************************************************************
* SelectClipRgn32 (GDI32.297)
*/
INT32 WINAPI SelectClipRgn32( HDC32 hdc, HRGN32 hrgn )
{
INT32 retval;
DC * dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC );
if (!dc) return ERROR;
TRACE(clipping, "%04x %04x\n", hdc, hrgn );
if (hrgn)
{
if (!dc->w.hClipRgn) dc->w.hClipRgn = CreateRectRgn32(0,0,0,0);
retval = CombineRgn32( dc->w.hClipRgn, hrgn, 0, RGN_COPY );
}
else
{
if (dc->w.hClipRgn) DeleteObject16( dc->w.hClipRgn );
dc->w.hClipRgn = 0;
retval = SIMPLEREGION; /* Clip region == whole DC */
}
CLIPPING_UpdateGCRegion( dc );
GDI_HEAP_UNLOCK( hdc );
return retval;
}
/***********************************************************************
* SelectVisRgn (GDI.105)
*/
INT16 WINAPI SelectVisRgn( HDC16 hdc, HRGN16 hrgn )
{
int retval;
DC * dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC );
if (!dc || !hrgn) return ERROR;
TRACE(clipping, "%04x %04x\n", hdc, hrgn );
dc->w.flags &= ~DC_DIRTY;
retval = CombineRgn16( dc->w.hVisRgn, hrgn, 0, RGN_COPY );
CLIPPING_UpdateGCRegion( dc );
GDI_HEAP_UNLOCK( hdc );
return retval;
}
/***********************************************************************
* OffsetClipRgn16 (GDI.32)
*/
INT16 WINAPI OffsetClipRgn16( HDC16 hdc, INT16 x, INT16 y )
{
return (INT16)OffsetClipRgn32( hdc, x, y );
}
/***********************************************************************
* OffsetClipRgn32 (GDI32.255)
*/
INT32 WINAPI OffsetClipRgn32( HDC32 hdc, INT32 x, INT32 y )
{
DC * dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC );
if (!dc)
{
dc = (DC *)GDI_GetObjPtr(hdc, METAFILE_DC_MAGIC);
if (!dc) return ERROR;
MF_MetaParam2(dc, META_OFFSETCLIPRGN, x, y);
GDI_HEAP_UNLOCK( hdc );
return NULLREGION; /* ?? */
}
TRACE(clipping, "%04x %d,%d\n", hdc, x, y );
if (dc->w.hClipRgn)
{
INT32 ret = OffsetRgn32( dc->w.hClipRgn, XLPTODP(dc,x), YLPTODP(dc,y));
CLIPPING_UpdateGCRegion( dc );
GDI_HEAP_UNLOCK( hdc );
return ret;
}
GDI_HEAP_UNLOCK( hdc );
return SIMPLEREGION; /* Clip region == client area */
}
/***********************************************************************
* OffsetVisRgn (GDI.102)
*/
INT16 WINAPI OffsetVisRgn( HDC16 hdc, INT16 x, INT16 y )
{
INT16 retval;
DC * dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC );
if (!dc) return ERROR;
TRACE(clipping, "%04x %d,%d\n", hdc, x, y );
retval = OffsetRgn32( dc->w.hVisRgn, x, y );
CLIPPING_UpdateGCRegion( dc );
GDI_HEAP_UNLOCK( 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.
*/
INT32 CLIPPING_IntersectClipRect( DC * dc, INT32 left, INT32 top,
INT32 right, INT32 bottom, UINT32 flags )
{
HRGN32 newRgn;
INT32 ret;
if (!(newRgn = CreateRectRgn32( left, top, right, bottom ))) return ERROR;
if (!dc->w.hClipRgn)
{
if( flags & CLIP_INTERSECT )
{
dc->w.hClipRgn = newRgn;
CLIPPING_UpdateGCRegion( dc );
}
return SIMPLEREGION;
}
ret = CombineRgn32( newRgn, dc->w.hClipRgn, newRgn,
(flags & CLIP_EXCLUDE) ? RGN_DIFF : RGN_AND );
if (ret != ERROR)
{
if (!(flags & CLIP_KEEPRGN)) DeleteObject32( dc->w.hClipRgn );
dc->w.hClipRgn = newRgn;
CLIPPING_UpdateGCRegion( dc );
}
else DeleteObject32( newRgn );
return ret;
}
/***********************************************************************
* ExcludeClipRect16 (GDI.21)
*/
INT16 WINAPI ExcludeClipRect16( HDC16 hdc, INT16 left, INT16 top,
INT16 right, INT16 bottom )
{
return (INT16)ExcludeClipRect32( hdc, left, top, right, bottom );
}
/***********************************************************************
* ExcludeClipRect32 (GDI32.92)
*/
INT32 WINAPI ExcludeClipRect32( HDC32 hdc, INT32 left, INT32 top,
INT32 right, INT32 bottom )
{
INT32 ret;
DC * dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC );
if (!dc)
{
dc = (DC *)GDI_GetObjPtr(hdc, METAFILE_DC_MAGIC);
if (!dc) return ERROR;
MF_MetaParam4(dc, META_EXCLUDECLIPRECT, left, top, right, bottom);
GDI_HEAP_UNLOCK( hdc );
return NULLREGION; /* ?? */
}
left = XLPTODP( dc, left );
right = XLPTODP( dc, right );
top = YLPTODP( dc, top );
bottom = YLPTODP( dc, bottom );
TRACE(clipping, "%04x %dx%d,%dx%d\n",
hdc, left, top, right, bottom );
ret = CLIPPING_IntersectClipRect( dc, left, top, right, bottom, CLIP_EXCLUDE );
GDI_HEAP_UNLOCK( hdc );
return ret;
}
/***********************************************************************
* IntersectClipRect16 (GDI.22)
*/
INT16 WINAPI IntersectClipRect16( HDC16 hdc, INT16 left, INT16 top,
INT16 right, INT16 bottom )
{
return (INT16)IntersectClipRect32( hdc, left, top, right, bottom );
}
/***********************************************************************
* IntersectClipRect32 (GDI32.245)
*/
INT32 WINAPI IntersectClipRect32( HDC32 hdc, INT32 left, INT32 top,
INT32 right, INT32 bottom )
{
INT32 ret;
DC * dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC );
if (!dc)
{
dc = (DC *)GDI_GetObjPtr(hdc, METAFILE_DC_MAGIC);
if (!dc) return ERROR;
MF_MetaParam4(dc, META_INTERSECTCLIPRECT, left, top, right, bottom);
GDI_HEAP_UNLOCK( hdc );
return NULLREGION; /* ?? */
}
left = XLPTODP( dc, left );
right = XLPTODP( dc, right );
top = YLPTODP( dc, top );
bottom = YLPTODP( dc, bottom );
TRACE(clipping, "%04x %dx%d,%dx%d\n",
hdc, left, top, right, bottom );
ret = CLIPPING_IntersectClipRect( dc, left, top, right, bottom, CLIP_INTERSECT );
GDI_HEAP_UNLOCK( hdc );
return ret;
}
/***********************************************************************
* CLIPPING_IntersectVisRect
*
* Helper function for {Intersect,Exclude}VisRect
*/
static INT32 CLIPPING_IntersectVisRect( DC * dc, INT32 left, INT32 top,
INT32 right, INT32 bottom,
BOOL32 exclude )
{
HRGN32 tempRgn, newRgn;
INT32 ret;
left = XLPTODP( dc, left );
right = XLPTODP( dc, right );
top = YLPTODP( dc, top );
bottom = YLPTODP( dc, bottom );
if (!(newRgn = CreateRectRgn32( 0, 0, 0, 0 ))) return ERROR;
if (!(tempRgn = CreateRectRgn32( left, top, right, bottom )))
{
DeleteObject32( newRgn );
return ERROR;
}
ret = CombineRgn32( newRgn, dc->w.hVisRgn, tempRgn,
exclude ? RGN_DIFF : RGN_AND );
DeleteObject32( tempRgn );
if (ret != ERROR)
{
RGNOBJ *newObj = (RGNOBJ*)GDI_GetObjPtr( newRgn, REGION_MAGIC);
RGNOBJ *prevObj = (RGNOBJ*)GDI_GetObjPtr( dc->w.hVisRgn, REGION_MAGIC);
if (newObj && prevObj) newObj->header.hNext = prevObj->header.hNext;
DeleteObject32( dc->w.hVisRgn );
dc->w.hVisRgn = newRgn;
CLIPPING_UpdateGCRegion( dc );
GDI_HEAP_UNLOCK( newRgn );
}
else DeleteObject32( newRgn );
return ret;
}
/***********************************************************************
* ExcludeVisRect (GDI.73)
*/
INT16 WINAPI ExcludeVisRect( HDC16 hdc, INT16 left, INT16 top,
INT16 right, INT16 bottom )
{
DC * dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC );
if (!dc) return ERROR;
TRACE(clipping, "%04x %dx%d,%dx%d\n",
hdc, left, top, right, bottom );
return CLIPPING_IntersectVisRect( dc, left, top, right, bottom, TRUE );
}
/***********************************************************************
* IntersectVisRect (GDI.98)
*/
INT16 WINAPI IntersectVisRect( HDC16 hdc, INT16 left, INT16 top,
INT16 right, INT16 bottom )
{
DC * dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC );
if (!dc) return ERROR;
TRACE(clipping, "%04x %dx%d,%dx%d\n",
hdc, left, top, right, bottom );
return CLIPPING_IntersectVisRect( dc, left, top, right, bottom, FALSE );
}
/***********************************************************************
* PtVisible16 (GDI.103)
*/
BOOL16 WINAPI PtVisible16( HDC16 hdc, INT16 x, INT16 y )
{
return PtVisible32( hdc, x, y );
}
/***********************************************************************
* PtVisible32 (GDI32.279)
*/
BOOL32 WINAPI PtVisible32( HDC32 hdc, INT32 x, INT32 y )
{
DC * dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC );
if (!dc) return ERROR;
TRACE(clipping, "%04x %d,%d\n", hdc, x, y );
if (!dc->w.hGCClipRgn) return FALSE;
if( dc->w.flags & DC_DIRTY ) UPDATE_DIRTY_DC(dc);
dc->w.flags &= ~DC_DIRTY;
return PtInRegion32( dc->w.hGCClipRgn, XLPTODP(dc,x), YLPTODP(dc,y) );
}
/***********************************************************************
* RectVisible16 (GDI.104)
*/
BOOL16 WINAPI RectVisible16( HDC16 hdc, LPRECT16 rect )
{
RECT16 tmpRect;
DC * dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC );
if (!dc) return FALSE;
TRACE(clipping,"%04x %d,%dx%d,%d\n",
hdc, rect->left, rect->top, rect->right, rect->bottom );
if (!dc->w.hGCClipRgn) return FALSE;
/* copy rectangle to avoid overwriting by LPtoDP */
tmpRect = *rect;
LPtoDP16( hdc, (LPPOINT16)&tmpRect, 2 );
return RectInRegion16( dc->w.hGCClipRgn, &tmpRect );
}
/***********************************************************************
* RectVisible32 (GDI32.282)
*/
BOOL32 WINAPI RectVisible32( HDC32 hdc, LPRECT32 rect )
{
RECT16 rect16;
CONV_RECT32TO16( rect, &rect16 );
return RectVisible16( (HDC16)hdc, &rect16 );
}
/***********************************************************************
* GetClipBox16 (GDI.77)
*/
INT16 WINAPI GetClipBox16( HDC16 hdc, LPRECT16 rect )
{
int ret;
DC * dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC );
if (!dc) return ERROR;
ret = GetRgnBox16( dc->w.hGCClipRgn, rect );
DPtoLP16( hdc, (LPPOINT16)rect, 2 );
return ret;
}
/***********************************************************************
* GetClipBox32 (GDI32.162)
*/
INT32 WINAPI GetClipBox32( HDC32 hdc, LPRECT32 rect )
{
INT32 ret;
DC * dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC );
if (!dc) return ERROR;
ret = GetRgnBox32( dc->w.hGCClipRgn, rect );
DPtoLP32( hdc, (LPPOINT32)rect, 2 );
return ret;
}
/***********************************************************************
* GetClipRgn32 (GDI32.163)
*/
INT32 WINAPI GetClipRgn32( HDC32 hdc, HRGN32 hRgn )
{
DC * dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC );
if( dc && hRgn )
if( dc->w.hClipRgn )
{
/* this assumes that dc->w.hClipRgn is in coordinates
relative to the DC origin (not device) */
if( CombineRgn32(hRgn, dc->w.hClipRgn, 0, RGN_COPY) != ERROR )
return 1;
}
else return 0;
return -1;
}
/***********************************************************************
* SaveVisRgn (GDI.129)
*/
HRGN16 WINAPI SaveVisRgn( HDC16 hdc )
{
HRGN32 copy;
RGNOBJ *obj, *copyObj;
DC * dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC );
if (!dc) return 0;
TRACE(clipping, "%04x\n", hdc );
if (!dc->w.hVisRgn)
{
fprintf( stderr, "SaveVisRgn: hVisRgn is zero. Please report this.\n" );
exit(1);
}
if( dc->w.flags & DC_DIRTY ) UPDATE_DIRTY_DC(dc);
dc->w.flags &= ~DC_DIRTY;
if (!(obj = (RGNOBJ *) GDI_GetObjPtr( dc->w.hVisRgn, REGION_MAGIC )))
{
GDI_HEAP_UNLOCK( hdc );
return 0;
}
if (!(copy = CreateRectRgn32( 0, 0, 0, 0 )))
{
GDI_HEAP_UNLOCK( dc->w.hVisRgn );
GDI_HEAP_UNLOCK( hdc );
return 0;
}
CombineRgn32( copy, dc->w.hVisRgn, 0, RGN_COPY );
if (!(copyObj = (RGNOBJ *) GDI_GetObjPtr( copy, REGION_MAGIC )))
{
GDI_HEAP_UNLOCK( dc->w.hVisRgn );
GDI_HEAP_UNLOCK( hdc );
return 0;
}
copyObj->header.hNext = obj->header.hNext;
obj->header.hNext = copy;
GDI_HEAP_UNLOCK( dc->w.hVisRgn );
GDI_HEAP_UNLOCK( hdc );
GDI_HEAP_UNLOCK( copy );
return copy;
}
/***********************************************************************
* RestoreVisRgn (GDI.130)
*/
INT16 WINAPI RestoreVisRgn( HDC16 hdc )
{
HRGN32 saved;
RGNOBJ *obj, *savedObj;
DC * dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC );
INT16 ret;
if (!dc) return ERROR;
if (!dc->w.hVisRgn)
{
GDI_HEAP_UNLOCK( hdc );
return ERROR;
}
TRACE(clipping, "%04x\n", hdc );
if (!(obj = (RGNOBJ *) GDI_GetObjPtr( dc->w.hVisRgn, REGION_MAGIC )))
{
GDI_HEAP_UNLOCK( hdc );
return ERROR;
}
if (!(saved = obj->header.hNext))
{
GDI_HEAP_UNLOCK( dc->w.hVisRgn );
GDI_HEAP_UNLOCK( hdc );
return ERROR;
}
if (!(savedObj = (RGNOBJ *) GDI_GetObjPtr( saved, REGION_MAGIC )))
{
GDI_HEAP_UNLOCK( dc->w.hVisRgn );
GDI_HEAP_UNLOCK( hdc );
return ERROR;
}
DeleteObject32( dc->w.hVisRgn );
dc->w.hVisRgn = saved;
CLIPPING_UpdateGCRegion( dc );
GDI_HEAP_UNLOCK( hdc );
ret = savedObj->rgn->type; /* FIXME */
GDI_HEAP_UNLOCK( saved );
return ret;
}
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