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- From: exuhag@exu.ericsson.se (James Hague)
- Newsgroups: comp.sys.atari.8bit
- Subject: Re: VBIs/DLIs as Proc's in Action!
- Message-ID: <1992Dec17.144710.17108@exu.ericsson.se>
- Date: 17 Dec 92 14:47:10 GMT
- References: <qsgwVB4w165w@cyberden.uucp>
- Sender: news@exu.ericsson.se
- Reply-To: exuhag@exu.ericsson.se
- Organization: Ericsson Network Systems, Richardson, TX
- Lines: 17
- Nntp-Posting-Host: s09a05.exu.ericsson.se
- X-Disclaimer: This article was posted by a user at Ericsson.
- Any opinions expressed are strictly those of the
- user and not necessarily those of Ericsson.
-
- In article qsgwVB4w165w@cyberden.uucp, phbill@cyberden.uucp () writes:
- >
- >But now, I've learned exactly how
- >multicolored text is done! (with Sync's) (ie, say you had a Gr.2 mode
- >text line.. instead of bit-mapping it onto a gr.7 mode, and then DLI'ing
- >every line of it, you just do a facny DLI to the Gr.2 mode, which changes
- >the color not just at every display list line, but every scan line (that
- >you specify)!)
-
- Be careful, this really eats up processor time. Every time you do
- a sync the CPU just sits there for the rest of the scan line. A full
- screen of this sort of thing will tie up the CPU for the entire frame,
- leaving only the vblank period for processing.
-
- --
- James Hague
- exuhag@exu.ericsson.se
-