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[Bug-mit-scheme] [bug #5329] graphics-draw-line not working

From: nobody
Subject: [Bug-mit-scheme] [bug #5329] graphics-draw-line not working
Date: Tue, 16 Sep 2003 00:29:55 -0400
User-agent: Mozilla/4.0 (compatible; MSIE 5.5; Windows NT 5.0)

=================== BUG #5329: FULL BUG SNAPSHOT ===================

Submitted by: None                    Project: MIT/GNU Scheme               
Submitted on: Tue 09/16/2003 at 00:29
Category:  None                       Severity:  5 - Major                  
Bug Group:  Incorrect behavior        Resolution:  None                     
Assigned to:  None                    Status:  Open                         

Summary:  graphics-draw-line not working

Original Submission:  I'm running 7.7.1 MIT scheme that comes with the scmutils 
stuff (http://www-swiss.ai.mit.edu/~gjs/6946/linux-install.htm).

Running the following code produces a window with two line.  There should just 
be one:


  (define win1 (frame -1 1 -1 1))

  (graphics-draw-line win1 .2 .9 .1 .3)

  (graphics-draw-line win1 .1 .3 .2 .9))

I see the same behavior with this:


  (define win1 (frame -1 1 -1 1))

  (graphics-move-cursor win1 .2 .9)

  (graphics-drag-cursor win1 .1 .3)

  (graphics-move-cursor win1 .1 .3)

  (graphics-drag-cursor win1 .2 .9))

Neither line is the correct line.  If the line to be plotted is horizontal or 
vertical, it works OK.

I'm running on Linuz, a recent (last 18 months) suse distribution.  I can't 
believe this bug escaped, so wonder if I've something misconfigured, but don't 
know where to begin to look.

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