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- Path: nntp.uio.no!solace!news
- From: "Bj÷rn Hagstr÷m" <orgin@medio.mh.se>
- Newsgroups: comp.sys.amiga.graphics
- Subject: Re: Using HAM8 on Workbench
- Date: 15 Mar 1996 12:06:15 GMT
- Organization: Solace Computer Society, Sundsvall
- Message-ID: <4ibmfn$874@fizban.solace.mh.se>
- References: <4i7al6$va6@tkhut.sojourn.com>
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-
- mharrell@sojourn1.sojourn.com (Matt Harrell) wrote:
- > I've read a few posts about using HAM8 mode on the Workbench
- >screen. I downloaded "WBHacksAGA" from the Aminet, and modified my
- >envarc:sys/screenmode.prefs (after renaming the original!) to use HAM8
- >mode. It definitely starts up OK in HAM8 after the reboot. One thing
- >I noticed right away was dramatically improved speed over the "normal"
- >8-bit (256 color out of 16.8 million) mode. However, it also seems to
- >confuse the hell out of the Workbench, and any program that tries to
- >put an image on the Workbench screen. It also seems to muck up the
- >top 4 colors of the Workbench's (AmigaOS3.0 on an A1200) palette (they
- >all come out as a bright green). I can't change the colors in the
- >palette program in Preferences because it's the one program on my hard
- >disk that still seems to think that the colors are OK. When I run
- >AMosaic and have it display a JPEG, for instance, on the Workbench
- >screen using an external viewer (MultiView), the JPEG ends up looking
- >much worse than it does on an ordinary 256 (or even 128) color
- >screen--like it has only 16 or 32 colors instead of many thousands to
- >display the picture. Additionally, if I try to use any picture with
- >lots of colors for a background on the Workbench (not something I
- >actually want to do, but I tried it as a test to see if the mode was
- >working correctly) the colors come out totally wrong--so bad that you
- >can't tell what the picture is supposed to be.
- > Has anyone managed to get this to work properly? Is there any
- >way that HAM8 mode can be used on the Workbench screen and still have
- >programs function correctly? Thanks a bunch (or maybe two).
-
- Try getting MUI-Screenmode on aminet or at :
- http://www.medio.mh.se/~orgin/software.html
-
- When using Ham6 or Ham8 , programs think that there is only 16/64 pens to use.
- This is because Ham6 and Ham8 has resp. 16 and 64 base colours.
-
- Ham 6 uses 6 bitplanes - But 2 of them is used to get the Ham colours.
- Ie. 2^4 (16) base pens.
-
- Ham 8 uses 8 bitplanes - But 2 of them is used to get the Ham colours.
- Ie. 2^6 (64) base pens.
-
- All colours are made of three components : Red,Green and Blue.
-
- These 2 bits functions something like this :
- 00 - Use base colour
- 01 - Modify Red component , keep Green and Blue.
- 10 - Modify Green component , keep Red and Blue.
- 11 - Modify Blue component , keep Red and Green.
-
- This means that in Ham6 you can only set each component by 16 steps,
- and in Ham8 64 steps.
-
- Most programs do not understand that you are running Ham mode. So they only
- use the base colours. There are a few programs that can use the ham colours.
-
- Which means that Ibrowse will only use 16 / 64 colours for its pictures.
-
- Check out the software on my homepage. I have been using Ham6 for over a
- year now and there are some snapshots of my Wb there.
-
- Regards.
- Bjorn Hagstrom
- ping9514@ntostud.mh.se
- http://www.medio.mh.se/~orgin/
-
-