Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!wuarchive!uunet!vtserf!morpheus!frank From: frank@morpheus.UUCP (Frank McPherson) Newsgroups: comp.sys.amiga.graphics Subject: Re: So, does *anyone* make 1024x768 x256 for the A3000? Message-ID: Date: 25 Apr 91 15:41:59 GMT References: <15230@helios.TAMU.EDU> <1991Apr24.162452.22106@hubcap.clemson.edu> <15250@helios.TAMU.EDU> <1991Apr24.211729.19270@bronze.ucs.indiana.edu> Organization: Virginia Polytechnic Institute Lines: 23 In article <1991Apr24.211729.19270@bronze.ucs.indiana.edu> tagreen@lothario.ucs.indiana.edu (Todd Green) writes: >In article <15250@helios.TAMU.EDU> n298ad@tamuts.tamu.edu (John Jordan) writes: >>Yes, 24 bitplanes, SO??? > >I think you mean 24 bits of information or a 24-bit plane, (i.e. 24 >bits of information for each pixel) and not 24 planes per se. > -- I think you're right about that. Think about it. A quick calculation tells you that a 640x400 pixel image with 24 bitplanes would occupy SIX megabytes (6,144,000 bytes, to be exact) of storage. Likewise, a 1024x768 image which had 24 bitplanes would occupy 18,874,368 bytes. Not something you'd be able to display on your average Amiga 3000. "24 bit graphics" does not imply 24 bit planes. I'm sure someone will correct me if I'm wrong, but I think that with normal 24 bit graphics boards, they allow you to choose 256 colours (8 bitplanes) from a palatte of 16 million (approx. 2^24). -- Frank McPherson INTERNET : emcphers@fox.cs.vt.edu -- -- AmigaUUCP : uunet!vtserf!morpheus!frank --