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From: scotte@applix.com (Scott Evernden)
Newsgroups: comp.windows.open-look
Subject: Re: Trouble XDrawLine GC, bug maybe???
Message-ID: <1190@applix.com>
Date: 1 May 91 04:04:38 GMT
References: <347@intran.UUCP>
Reply-To: scotte@applix.UUCP (Scott Evernden)
Organization: APPLiX Inc., WestboroMA
Lines: 30

In article <347@intran.UUCP> tom@intran.UUCP (Tom B.) writes:
>
>When I draw a line using XDrawLine  on a sun, I can only get even line thicknesses.
>

I've been trying to port an X app. to OpenLook 2 for about a month, so I'm
still new on this topic, but this is just one of several "strange" things
that Sun's X appears to do.

Actually even/odd pixel lines appear different on the diagonal, h or v lines
are the same even or odd thickness.  Also, the "density" of the lines is, to
my eyes, wrong, as you go around bends, for certain thicknesses.

Other probs: the line draw code likes to just insert arbitrary pixels and
leave others out at corners and such- no way to predict what's going to
happen.

Text clipping against the left window edge (text starts outside the window)
in GXor mode is broken.  I can see artifacts of a utility pixmap which isn't
cleared between draws.

There are a coupla other flakeys which I can't remember right now.

BTW, I do most of my work on a 486/33 and ATT SYSVr4, and both X Window
servers I use (R3 and R4) clock in at about 2-3 times faster at off-screen
renders (to 8 plane pixmaps - about 75% text) than a Sun IPC.  Is there some
reason why the Sun implementation is so slow?  Is all this rendering done
via Postscript or something? 

-scott