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- Path: nntp.teleport.com!sschaem
- From: sschaem@teleport.com (Stephan Schaem)
- Newsgroups: comp.sys.amiga.programmer
- Subject: Re: Bitfieldinsert?
- Date: 3 Mar 1996 04:00:56 GMT
- Organization: Teleport - Portland's Public Access (503) 220-1016
- Message-ID: <4hb5ho$r52@maureen.teleport.com>
- References: <38232647@kone.fipnet.fi> <4gso1n$2l0@maureen.teleport.com> <38232758@kone.fipnet.fi>
- NNTP-Posting-Host: julie.teleport.com
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-
- Jyrki Saarinen (jsaarinen@kone.fipnet.fi) wrote:
-
- : > : > áthe source code .. but then its for the x86 :)
- : >
- : > : Hmm, any ideas how? That would be 4 pixels per one instruction..
- : >
- : > shading table and using 32bit move.
-
- : How? You cant do move.l (a0)+,(a1)+ oc 80x86.
-
- I didn't look at the source... the readme just said ".25 cycle per pixel"
- (not pentium)
-
- : > I was talking about ham6, 4bit per componant not 24...
- : > This mean you use a 4bit plain c2p routine...
- : > ~18ms for 320x200 cpu only. 25mhz 030.
- : > Since its interleaved when you render true color you switch source
- : > componant depanding on the row you render. The result is something
- : > like "transgresion2" (If you have a PC check it out, it does 6bit
- : > per componant ).
- : > The power required to do this on an amiga is render in 4bit with
- : > source switching (no overhead really, happen once per scan line and is
- : > only getting one of 3 pointer), and 4bit c2p to a ham6 screen with the
- : > upper 2 bit preset.
- : > The result is TV style 12bit color res with 256*100 spacial res
- : > on a 6bit 256*300 ham6 screen using 4bit per pixel.
-
- : Hmm. 4 bit c2p, how is the palette organized? I guess blitter
- : assistance could be good, again.
-
- There is no palette... if you want to use the palette you need to
- use a 6bit c2p.
-
- Stephan
-