Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!uwm.edu!csd4.csd.uwm.edu!jrn
From: jrn@csd4.csd.uwm.edu (James Ray Norton)
Newsgroups: comp.graphics
Subject: Turbo Help...
Message-ID: <437@uwm.edu>
Date: 12 Oct 89 00:44:43 GMT
Sender: news@uwm.edu
Reply-To: jrn@csd4.csd.uwm.edu (James Ray Norton)
Distribution: usa
Organization: University of Wisconsin-Milwaukee
Lines: 45

I have a question...


In Turbo Pascal v5.0 there is a command called GetImage..

After loading a graphics image onto the VGA screen,  I am displaying some lines
Before putting the lines on the screen I save the image under the line..

ie.  I do this    GetImage(240,0,240,480,PicX)
      
This works...  Because I can then Draw the line and do the following
                  PutImage(240,0,PicX,NormalPut);

And the line dissappears...

BUT..

It seems doing that for the horizontal line doesn't work..

  I try this     GetImage(0,240,480,240,PicY)

Then I draw the line...

Then I try this      PutImage(0,240,PicY,NormalPut)...

This doesn't work...ie the line does not dissappear..

Can anybody help?

Is this problem due to some oddity with GetImage? and/or PutImage?

This is very important because I am writing a Fractal generator and I need
the lines for the user to specify a window....

THanks in advance..

Jim Norton

jrn@csd4.csd.uwm.edu

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' )  / ' )   / ' ) ) )                                  jrn@csd4.csd.uwm.edu