home *** CD-ROM | disk | FTP | other *** search
- Path: comma.rhein.de!serpens!not-for-mail
- From: mlelstv@serpens.rhein.de (Michael van Elst)
- Newsgroups: comp.sys.amiga.misc
- Subject: Re: Hombre history - RISC selection
- Date: 9 Jan 1996 23:10:07 +0100
- Organization: dis-
- Message-ID: <4cup3v$36r@serpens.rhein.de>
- References: <john.hendrikx.44pj@grafix.xs4all.nl>
- NNTP-Posting-Host: serpens.rhein.de
-
- john.hendrikx@grafix.xs4all.nl (John Hendrikx) writes:
-
- >Fringing is much worse than a simple quantization error.
-
- I beg to differ.
-
- >HAM8 actually causes
- >pixels which have wrong colors (wrong HUE) and wrong brightness.
-
- Same as quantization error. BTW, I can make HAM8 even better if
- I allow the same memory usage (i.e. twice the number of pixels of
- your 16bit display).
-
- >TrueColor data: $ff ff ff $e9 e9 e9
- > HAM displays: $ff ff ff $ff e9 ff
-
- >Not only is the color too bright, it also isn't gray anymore as it should be.
-
- Of course it is hardly the problem with digitized images and the most
- simple HAM technique (16 gray levels used in the palette) would display
- a $f0 $f0 $f0 instead. If I am allowed to use the same amount of memory
- I can even generate $f0 $f0 $f0 and $e0 $e0 $e0 which produces nearly
- the exact brightness.
-
- >If you only draw the lines from left to
- >right (in HAM you're forced to do this)
-
- Not correct.
-
- >then the quantization errors will
- >slowly shift to the right of the picture.
-
- Not correct.
-
- >HAM8 is simply not supported as it is impossible to use a display mode like HAM
- >for graphics rendering. Even doing a simple thing like drawing a line gives
- >enormous problems.
-
- HAM8 is just good for displaying pictures. Nobody claimed something
- else. And using 16bit for displaying "graphics rendering" (line art,
- etc..) is clearly overkill.
-
- >The real thing for me is a Chunky True Color screen, and 16-bit fits that
- >description.
-
- A 3-bit screen would do the same. Do you claim that it is better than
- HAM8 too ?
-
- --
- Michael van Elst
-
- Internet: mlelstv@serpens.rhein.de
- "A potential Snark may lurk in every tree."
-