/* Returns the difference between the union and the intersection of two
* regions. This is a region containing the pixels that are in one of the
* source regions, but which are not in both. */
int
clip_GDK_REGIONXOR(ClipMachine * ClipMachineMemory)
{
C_object *creg = _fetch_co_arg(ClipMachineMemory);
C_object *creg2 = _fetch_cobject(ClipMachineMemory, _clip_spar(ClipMachineMemory, 2));
C_object *cdest;
CHECKCOBJ(creg, GDK_IS_REGION(creg->object));
CHECKARG2(2, MAP_type_of_ClipVarType, NUMERIC_type_of_ClipVarType);
CHECKCOBJ(creg2, GDK_IS_REGION(creg->object));
gdk_region_xor(GDK_REGION(creg), GDK_REGION(creg2));
if (creg)
{
cdest = _register_object(ClipMachineMemory, GDK_REGION(creg), GDK_TYPE_REGION, NULL, NULL);
if (cdest)
_clip_mclone(ClipMachineMemory, RETPTR(ClipMachineMemory), &cdest->obj);
}
return 0;
err:
return 1;
}
bool wxRegion::DoXor( const wxRegion& region )
{
wxCHECK_MSG( region.Ok(), false, _T("invalid region") );
if (!m_refData)
{
return false;
}
AllocExclusive();
gdk_region_xor( M_REGIONDATA->m_region, region.GetRegion() );
return true;
}
static void sCombineRegion(cdCtxCanvas *ctxcanvas, GdkRegion* rgn)
{
switch(ctxcanvas->canvas->combine_mode)
{
case CD_UNION:
gdk_region_union(ctxcanvas->new_rgn, rgn);
break;
case CD_INTERSECT:
gdk_region_intersect(ctxcanvas->new_rgn, rgn);
break;
case CD_DIFFERENCE:
gdk_region_subtract(ctxcanvas->new_rgn, rgn);
break;
case CD_NOTINTERSECT:
gdk_region_xor(ctxcanvas->new_rgn, rgn);
break;
}
gdk_region_destroy(rgn);
}
bool wxRegion::DoXor( const wxRegion& region )
{
if (region.m_refData == NULL)
{ }
else if (m_refData == NULL)
{
// XOR-ing with an invalid region is the same as XOR-ing with an empty
// one, i.e. it is simply a copy.
m_refData = new wxRegionRefData(*M_REGIONDATA_OF(region));
}
else
{
AllocExclusive();
#ifdef __WXGTK3__
cairo_region_xor(M_REGIONDATA->m_region, M_REGIONDATA_OF(region)->m_region);
#else
gdk_region_xor( M_REGIONDATA->m_region, region.GetRegion() );
#endif
}
return true;
}
static VALUE
rg_xor(VALUE self, VALUE region)
{
gdk_region_xor(_SELF(self), _SELF(region));
return self;
}
