nanogui: Images not drawn (FLTK+nxlib app with nano-X)


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Subject: Re: [nanogui] Images not drawn (FLTK+nxlib app with nano-X)
From: "Greg Haerr" ####@####.####
Date: 31 Jan 2006 15:33:35 +0000
Message-Id: <042a01c6267b$af885c20$6401a8c0@winXP>

> I would like to know if it makes sense to you and why GrSetGCClipOrigin()
did not do it correctly?
> Why the call to GrOffsetRegion() is necessary?

Martin -
    I don't understand this yet either.  Before your fix, the region is
offset
in the GsPrepareWindow code, which ultimately calls GdOffsetRegion.
Your fix sets the region offset immediately...


> If it makes sense to you, then you can check this into nxlib CVS.

Yes, I'll add it.



> The only problem now is that some of my images are slightly clipped on the
right edge. I think this is a rounding to the byte/word(?) boundary.
> Is there a problem with image widths not divisible by 8?

Yes - the MWIMAGEBITS typedef is unsigned short, which requires
images to be a multiple of 16 (two bytes).  It seems this could be a problem
with X11 images being allowed with no short-padded boundary.  However,
this should cause the images to be one dot too large, not clipped.  Please
comment.

Regards,

Greg



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