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From: jwz@teak.berkeley.edu (Jamie Zawinski)
Newsgroups: comp.sys.amiga.tech
Subject: How do you draw to the screen quickly?
Message-ID: <21908@pasteur.Berkeley.EDU>
Date: 8 Feb 90 22:43:11 GMT
Sender: news@pasteur.Berkeley.EDU
Reply-To: Jamie Zawinski <jwz@teak.berkeley.edu>
Lines: 13


I just recently got "popi", the image processing program described in 
Gerald Holzmann's book "The Digital Darkroom"; this program runs on a variety
of systems, but the conditionally-compiled Amiga code is really really slow,
and I'd like to fix this.  So.

Given a one-dimensional array of 8 bit (greyscale) quantities, I need to be
able to draw one scanline.  There must be a way to do this without repeatedly
calling WritePixel(), right?  (I realize that the Amiga can only display four
bits of grey, but 8 bits is used interally by the program, and I'd rather 
not alter its portable data structures.)  Any ideas?

		-- Jamie