Path: utzoo!attcan!uunet!munnari!uniwa!vaxa!d_volaric
From: d_volaric@vaxa.uwa.oz
Newsgroups: comp.sys.mac.programmer
Subject: Re: Text Drawing at speeds in excess of 1200baud
Message-ID: <568029@vaxa.uwa.oz>
Date: 16 Jan 89 21:49:30 GMT
References: <2220@uokmax.UUCP>
Organization: University of Western Australia
Lines: 33

In article <2220@uokmax.UUCP>, srpenndo@uokmax.UUCP (Sean Richard Penndorf) writes:
> 
> I am writing a terminal program in LSP, and in my development have found
> that the DrawChar routine bogs down when you are connected at speeds
> greater than 1200baud.  My ultimate goal is to be able to write to the
> screen at 2400baud.
> 
> I have tried saving the font being used in a BitMap, then stamping it to
> the screen with CopyBits.  I have also tried using DrawText, and the lower
> level routine StdText (?).  So far, everything I have tried bogs down
> at 2400baud.  
> 
> Does anyone out there in NetLand have any clues to what I can try?  Any
> comments at all will be greatly appreciated.  Thanks in advance.
> 
> Sean

I don't know if you are doing so already, but I would buffer the text coming
from the serial port and then use DrawText to draw a bunch of characters
at the same time. I doubt whether DrawText of say, 10 characters is slower
that 10 characters at 2400 baud. I would check the buffer every few ticks
(60ths of a second) and draw it to the screen if there is anything there.
I think "every few ticks" should be less than the time it takes for a person
to type a character (10 ticks?) so that characters apear when the user types
them. If you are into high-adventure you could use a VBL task.

( If DrawText is too slow, write your local congressman and/or Apple Systems
Programmer :-) )

I hope this is some help.

Darko "Yes, it is my real name" Volaric
Disclaimer: These opinions are my own. I am only freeloading off the uni.