nanogui: [Nano-X] PolygonRegion
Subject:
Re: [Nano-X] PolygonRegion
From:
"tanghao" ####@####.####
Date:
7 Jun 2000 01:46:29 -0000
Message-Id: <009101bfd022$1d9ae860$ba64a8c0@tanghao>
hi,
Can i share the code? i am interesting on add the wrapper function of region and clip.
when i ported the fltk to nano-x api. it had some problems ,for not having the region function
in client nano-x api.
> (polygons). I can find you some code for this if you are
> interested.
>
could youp send me too,thanks .
btw, if interesting ,see my fltk port code at http://townhall.top263.net/fltk-1.0.7.NanoX.s.tar.gz
> : When I started to add wrapper function for PolygonRegion, I
> : found that there's no corresponding function in devrgn.c.
> : So, I need to implement one.
> : However, current definition of clipping regions is based
> : on rectangles.
> : In this way, I think it is not easy to implement PolygonRegion.
> : I suggest use bitmap for clipping regions instead.
> : What do you think about that?
>
> Murphy -
> No, we don't want to use bitmaps for clipping regions. The
> y-x-banding clip region code is perfectly capable of creating
> a polygon-based region. Think of many rectangles all tiling
> the interior area of the polygon. It is important to always
> use the MWCLIPREGION structure for regions, since then
> arbitrary regions can always be and/or/xor/excluded from
> any other using the existing routines. So the real problem
> is creating the MWCLIPREGION from a set of lines
> (polygons). I can find you some code for this if you are
> interested.
>
> Regards,
>
> Greg
>
>
>
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