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Conference hydra::amiga_v1

Title:	AMIGA NOTES
Notice:	Join us in the NEW conference - HYDRA::AMIGA_V2
Moderator:	HYDRA::MOORE

Created:	Sat Apr 26 1986
Last Modified:	Wed Feb 05 1992
Last Successful Update:	Fri Jun 06 1997
Number of topics:	5378
Total number of notes:	38326

837.0. "Blitter Operations" by CURE::WISNER () Thu Oct 22 1987 13:56

    
    I read somewhere (I think in the USENET postings) that the Blitter
    could be used do draw lines.  I wish I could find where I read that,
    it didn't seem important at the time I was reading.  My current
    assumption is that the person who said that must have gone insane.
    As far as I can tell the blitter is only good for copying rectangular
    bitmaps (with masks and bitwise operators).  
    
    Would someone please assure me that the blitter cannot be used to
    draw lines???

T.R	Title	User	Personal Name	Date	Lines
837.1		CURE::WISNER		`Thu Oct 22 1987 14:12`	9
	I remember reading that too. I believe the Blitter is talked about in depth in the Hardware Reference Manual and briefly in the Libraries and Devices manual. Maybe it was only horizontal and vertical lines. I'll have to dig out the manuals tonight... --Mike
837.2	Hardware Line Draw	TLE::RMEYERS	Randy Meyers	`Thu Oct 22 1987 18:22`	8
	Re: .0 The blitter does support hardware line draw. Dale Luck is credited with badgering the hardware people into doing it, and telling them how to. If you just use the graphics routine to draw the line, it will set up the blitter to do it.
837.3	BlitLab...good way to play with blitter	MPGS::BAEDER		`Thu Oct 22 1987 21:16`	11
	look at the blitlab stuff for more info on the blitter...this is a really FINE piece of work, but over my head (or interst level ;-) I played with it a bit, and its a great way it interact with the beast for experimenting, etc...posted to usenet, and on a fish disk... I may have an early version on-line (the usenet one)...Look around in....mpgs::user3:[baeder.news.old] (I thinks thats where I leave old usenet things.....;-) good luck! scott.
837.4	Sorry...only the manual on-line	MPGS::BAEDER		`Thu Oct 22 1987 21:55`	5
	sorry...all thats left on line is the TeX source for the manual...if you need it, let me know, and I'll look around at home...I think I kept it.... scott.
837.5	the blitter: How fast is fast?	CURE::WISNER		`Fri Oct 23 1987 13:36`	11
	re: .2 Which graphics routine will draw a line using the Blitter? I'm using Draw (rastPort,X,Y) and feel somewhat dissapointed with the performance I'm getting. My animation consists of a 20 segment line moving in a double buffered lo-res screen. I'm only getting about 20 updates a second. In each update I erase that old lines, draw the new lines, WaitTOF, and flip the screens. To me, 20 updates a second seems slow considering what I've seen the blitter do with Bobs.