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(*
Copyright (c) 2001, 2015
David C.J. Matthews
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License version 2.1 as published by the Free Software Foundation.
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
*)
structure Clipping :
sig
type HDC and HRGN
type RECT = { top: int, left: int, bottom: int, right: int }
type POINT = { x: int, y: int }
type RegionOperation = Region.RegionOperation
type ResultRegion = Region.ResultRegion
val ExcludeClipRect : HDC * RECT -> ResultRegion
val ExtSelectClipRgn : HDC * HRGN * RegionOperation -> ResultRegion
val GetClipBox : HDC -> ResultRegion * RECT
val GetClipRgn : HDC * HRGN -> unit
val GetMetaRgn : HDC * HRGN -> unit
val IntersectClipRect : HDC * RECT -> ResultRegion
val OffsetClipRgn : HDC * int * int -> ResultRegion
val PtVisible : HDC * POINT -> bool
val RectVisible : HDC * RECT -> bool
val SelectClipPath : HDC * RegionOperation -> unit
val SelectClipRgn : HDC * HRGN -> unit
val SetMetaRgn : HDC -> unit
end =
struct
local
open Foreign Base GdiBase
in
type RegionOperation = RegionOperation and ResultRegion = ResultRegion
type RECT = RECT and HDC = HDC and HRGN = HRGN and POINT = POINT
val ExtSelectClipRgn = winCall3(gdi "ExtSelectClipRgn") (cHDC,cHRGN,REGIONOPERATION) RESULTREGION
val GetClipRgn = winCall2(gdi "GetClipRgn") (cHDC,cHRGN) (successState "GetClipRgn")
val GetMetaRgn = winCall2(gdi "GetMetaRgn") (cHDC,cHRGN) (successState "GetMetaRgn")
val OffsetClipRgn = winCall3(gdi "OffsetClipRgn") (cHDC,cInt,cInt) RESULTREGION
val RectVisible = winCall2(gdi "RectVisible") (cHDC,cConstStar cRect) cBool
val SelectClipPath = winCall2(gdi "SelectClipPath") (cHDC,REGIONOPERATION) (successState "SelectClipPath")
val SelectClipRgn = winCall2(gdi "SelectClipRgn") (cHDC,cHRGN) (successState "SelectClipRgn")
val SetMetaRgn = winCall1(gdi "SetMetaRgn") (cHDC) (successState "SetMetaRgn")
local
val ptVisible = winCall3(gdi "PtVisible") (cHDC,cInt,cInt) cBool
in
fun PtVisible(hd, {x, y}) = ptVisible(hd, x, y)
end
local
val excludeClipRect = winCall5 (gdi "ExcludeClipRect") (cHDC,cInt,cInt,cInt,cInt) RESULTREGION
in
fun ExcludeClipRect (h,{left,top,right,bottom}) = excludeClipRect(h,left,top,right,bottom)
end
local
val intersectClipRect =
winCall5 (gdi "IntersectClipRect") (cHDC,cInt,cInt,cInt,cInt) RESULTREGION
in
fun IntersectClipRect (h,{left,top,right,bottom}: RECT) =
intersectClipRect(h,left,top,right,bottom)
end
local
val getClipBox = winCall2 (gdi "GetClipBox") (cHDC, cStar cRect) RESULTREGION
val zeroRect = { top=0, bottom=0, left=0, right=0}
in
fun GetClipBox hdc =
let val v = ref zeroRect val res = getClipBox(hdc, v) in (res, !v) end
end
end
end;
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