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From: ts@uwasa.fi (Timo Salmi LASK)
Newsgroups: comp.lang.pascal
Subject: Re: Text attribute in Graphics mode
Keywords: Text Background color
Message-ID: <1990Aug25.214403.12139@uwasa.fi>
Date: 25 Aug 90 21:44:03 GMT
References: <14046@wpi.wpi.edu> <31799@unix.cis.pitt.edu>
Organization: University of Vaasa
Lines: 35

In article <31799@unix.cis.pitt.edu> cncst3@unix.cis.pitt.edu (Chunqing N. Cheng) writes:
>When working with BGI, you cannot use pascal's WRITE or WRITELN unless
>you set DIRECTVIDEO=FASLE.  I do not like the tiny characters from
>OUTTEXT or OUTTEXTXY.  But in both cases (either WRITE or OUTTEXT),

Graphics programming is not easy, and thus your dilemmas are
understandable, but you have things just slightly confused.  The
outtext characters need not be tiny.  You can multiply their size
both in height, and in width.  It is a case of read the manual. 
(See SetTextStyle in your reference). 

>I cannot set up BACKGROUND color freely. If I use OUTTEXT, whenever
>I change background color, whole screen change.  When I use WRITE,
>TEXTBACKGROUND does not function at all.

You a right, but one can work around this problem by drawing the
background.  The easiest way to do that is apply the Bar command
appropriately. 

Note that mixing write-command and graphics mode is not the intended
way of going about these things.  And if you do not like the way
OutText characters are drawn, you can device fonts yourself or read
textmode fonts from memory using interrupts.  But this can already
be considered fairly advanced. 

>I saw some programs do use different colors for background color in
>graphics mode, how can I do this in Turbo Pascal? 

As per above.  The colors in the background are not really
background colors, but foreground made to look like background. 

...................................................................
Prof. Timo Salmi        (Moderating at anon. ftp site 128.214.12.3)
School of Business Studies, University of Vaasa, SF-65101, Finland
Internet: ts@chyde.uwasa.fi Funet: gado::salmi Bitnet: salmi@finfun