From: Gautier DOT DeMontmollin AT maths DOT unine DOT ch
Newsgroups: comp.os.msdos.djgpp
Subject: Re: Writing Drivers?
Message-ID: <9DN3PsygTq+p@nedcu4>
Date: 5 Oct 98 14:27:38 MET
References: <907589267 DOT 988799 AT mars DOT cs DOT unp DOT ac DOT za>
Organization: University of Neuchatel, Switzerland
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NNTP-Posting-Host: nedcu4.unine.ch
To: djgpp AT delorie DOT com
DJ-Gateway: from newsgroup comp.os.msdos.djgpp

jdominy AT saturn DOT cs DOT unp DOT ac DOT za (James Dominy) writes:

> Right I've got two putpixel routines, one for VESA 1.2 banked mode, the
> other for VESA 2.0 Linear Frame Buffer Mode.
> 
> They are both implemented as macros now for speed purposes, although no
> doubt inline would have much the same effect on performance.
> 
> However, I do not want to continuously have if statements all over my code
> checking which routine should be used. So, I set up an array as such
> 
> void *putpixel[2](int x, int y, int c);
> 
> and call putpixel[0](0,0,15) for example or use 1 instead of 0 for the
> second routine.
> 
> But can I inline them in any way? I realize that this would involve the
> compiler knowing which routine would be used on each call, but I would know
> that from after my mode setting routine!
> 
> Any help appreciated!

A good solution is in SVGA02.ZIP @ ftp://ftp.gwu.edu/pub/ada/ez2load/
Of course inling is trivial to program in Ada (pragma inline) and
cross-package inlining is supported by GNAT compiler (@ same address) -
no need of macro-assembler level tricks...

Gautier