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- Path: grafix.xs4all.nl!john.hendrikx
- Date: Mon, 04 Mar 96 22:28:31 GMT+1
- Newsgroups: comp.sys.amiga.programmer
- Distribution: world
- Subject: Re: Amiga doesn`t need Pl
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- From: john.hendrikx@grafix.xs4all.nl (John Hendrikx)
- Message-ID: <john.hendrikx.4j9e@grafix.xs4all.nl>
- Organization: Private
-
- In a message of 01 Mar 96 Peter McGavin wrote to All:
-
- PM> Golly, did I really write that? John's message threw me by saying the
- PM> blit had to be 1 word wide. Yet I was almost certain I had worked it
- PM> out earlier and was quite puzzled by it not being possible after all.
- PM> Anyway, I just worked it out again. The _source_ modulos are 0 in the
- PM> final (usually 4th) C2P pass, hence we can set the width and height to
- PM> anything we want that multiplies to the right total. The width doesn't
- PM> have to be 1 in the final pass. We can set width, height and
- PM> destination modulo to match the destination window and bitmap as I said
- PM> in the first place. So it _is_ possible to blit a smaller part of the
- PM> whole screen (horizontally) with C2P.
-
- That's not the whole story then because in my version of BlitterC2P the source
- modulo's are definitely not zero (they are 16-2 for 8 bitplane C2P)
-
- Grtz John
-
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