| T.R | Title | User | Personal
Name | Date | Lines |
|---|
| 2770.1 | How about this... | SMAUG::SPODARYK | Scaring the pedestrians... | Thu Jul 27 1989 16:02 | 10 |
| Hmn, you can't do a 640x400 HAM image. How about a 320x400 HAM image?
320 x 400 x 6 (HAM = 6 bit planes) = 768000 bits
= 96000 Bytes
= 93.75 KB
-Steve (it makes sense to me)
If you're displaying the image in a screen or window, there is some
additional overhead.
|
| 2770.2 | Oops, I'm asleep... | SMAUG::SPODARYK | Scaring the pedestrians... | Thu Jul 27 1989 16:18 | 12 |
| Oh well. Is it Friday yet?
HAM uses 12 bits to determine the color per pixel. So you
really reserve 640 x 400 x 6 bit planes. HAM then uses a pair of
6 bits per pixel, and reduces the effective resolution to 320 x 400.
So, however you look at it, its a substansial amount of memory.
320 x 400 x 12 ( 2^12 = 4096 colors ) = 1536000 bits
= 192000 Bytes
= 187.5 KB
See HAM discussions elsewhere...
|
| 2770.3 | | ANT::JANZEN | cf. ANT::CIRCUITS,ANT::UWAVES | Thu Jul 27 1989 16:22 | 3 |
| both wrong.
I'll quote the manual later.
tom
|
| 2770.4 | I vote for .1 | TLE::RMEYERS | Randy Meyers | Thu Jul 27 1989 17:34 | 13 |
| Re: .2
HAM only uses 6 bits per pixel total. It gets the effect of 12 bits per
pixel by encoding this pixel as a delta from the previous pixel (2 bit
command to replace the R, G, or B component of the previous pixel or to
load the color from one of the first 16 color registers).
Re: .3
> both wrong [referring to .1 and .2].
> I'll quote the manual later.
I can always be proven wrong, but I agree with the statements in .1.
|
| 2770.5 | I agree, .1 is correct | TALLIS::MCAFEE | Steve McAfee | Thu Jul 27 1989 18:44 | 0 |
| 2770.6 | never mind.... | ANT::JANZEN | cf. ANT::CIRCUITS,ANT::UWAVES | Thu Jul 27 1989 20:32 | 16 |
| Now I'm going to show you all. This will teach you:
Amiga Hardware Reference Manual page 38:
"Note that in high-resolution mode, you can have up to four bit-planes
in the playfield and, therefore, up to 16 colors."
From the Scuplt 3D manual: page 18:
"If your imaging method employs Hold and Modify (HAM) grpahics in
order to use 4096 colors, the image that is displayed will be in
LO-RES"
So .1 is right and I was wrong. This will teach you not to shoot
from the hip, but to carefully be certain of what you say about
technical details.
Tom
|
| 2770.7 | Wait for me :-) | FRAMBO::BALZER | Christian Balzer DTN:785-1029 | Fri Jul 28 1989 03:51 | 9 |
|
Re: *
Darn, why do these interesting and funny discussions always happen
when I'm already home or getting hopelessly drunk???
I vote for a bann of the time zones..... :-) :-)
<CB>
|
| 2770.8 | Ignore Time Zones | TLE::RMEYERS | Randy Meyers | Fri Jul 28 1989 17:59 | 7 |
| Re: .7
> Darn, why do these interesting and funny discussions always happen
> when I'm already home or getting hopelessly drunk???
Just do what I do, enter a reply anyway and pretend you didn't know
that someone else already answered. :-)
|
| 2770.9 | clean-up | HYSTER::DEARBORN | Trouvez Mieux | Mon Jul 31 1989 13:17 | 4 |
| Now, why don't we delete replies .2 thru .9?
Randy
|
| 2770.10 | Whose to judge what notes will die? | ANT::JANZEN | cf. ANT::CIRCUITS,ANT::UWAVES | Mon Jul 31 1989 13:23 | 10 |
| > < Note 2770.9 by HYSTER::DEARBORN "Trouvez Mieux" >
> -< clean-up >-
>
>Now, why don't we delete replies .2 thru .9?
>
>Randy
Because .6 is the only one that quotes the documentation, and therefore
is the
only one you can trust.
Tom
|