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Atari demoscene BBS
| Re: Multi Palette File format |
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Posted by: evil
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Oct,10.2012-16:55
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Great stuff Zerkman :)
Already have Doug Little updated his tool to outmatch my complicated conversion, but here is a second one to do it in just a couple of weeks time :)
However, I think that there's a little bug lurking in the conversion program in RAW mode.
There is no file format explained for RAW, but to my trial and error it looks to be:
208*273 bytes bitmap data for screen 1
96*273 bytes palette data for screen 1
208*273 bytes bitmap data for screen 2
96*273 bytes palette data for screen 2
= 165984 bytes file
All good and dandy so far, it makes sense.
I decided to start out with using a 1:1 copy of your overscan and colour-burst code, to make sure there are no timings wrong. All is fine, borders opened and colours are spanking the poor shifter.
However, the colours are wrong :) The red channel seems to be missing almost entierly and the green/blue ones doesn't seem to match with 0-15 values either, or perhaps the lack of red make them look strange too.
Here is the RAW picture with your code in my demosystem:
http://ae.dhs.nu/pics/tiger_raw1.png
Here's the same image with MPP and your viewer program:
http://ae.dhs.nu/pics/tiger_mpp.png
And the original:
http://ae.dhs.nu/pics/tiger.png
Colour data from the leftmost st scanline 0:
<code>
004A 0001 005B 0050 005A 0009 0051 0052
0053 0049 0098 0090 00A4 0092 00E2 009A
0048 0052 0099 004A 0050 012C 0051 0091
</code>
Colour data from the leftmost at scanline 135 (mid picture):
<code>
015A 01A2 00C8 01A3 0111 01EB 0088 0040
0159 01AB 01EB 01A2 012C 0049 0088 00D1
0159 0040 016D 00DB 01B6 01FF 0092 0000
</code>
At scanline 136, there should be an orange colour for the tigers fur. But the red component seems to stay at 1 and not go past it.
I use bmp2mpp like this:
bmp2mpp -9 --mode=3 --double --raw filename.bmp filename.bin
I'm very, very bad at reading C, even worse at writing it, so any chance you could have a look to see if the RAW palette mode is hiding a bug?
Thank you,
--
Anders Eriksson
ae@dhs.nu
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[All messages in this thread] [Start new thread]
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Topic
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Posted by
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Date
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Multi Palette File format
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zerkman
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Oct,09.2012-00:58
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Re: Multi Palette File format
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Jace
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Oct,09.2012-06:15
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Re: Multi Palette File format
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ggn
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Oct,09.2012-19:54
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Re: Multi Palette File format
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evil
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Oct,10.2012-16:55
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Re: Multi Palette File format
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zerkman
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Oct,10.2012-21:53
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Re: Multi Palette File format
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baah
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Oct,10.2012-23:07
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Re: Multi Palette File format
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Jace
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Oct,11.2012-08:58
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Re: Multi Palette File format
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nativ
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Oct,11.2012-20:33
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Re: Multi Palette File format
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Cyg
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Oct,12.2012-13:12
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Re: Multi Palette File format
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nativ
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Oct,12.2012-15:08
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Re: Multi Palette File format
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zerkman
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Oct,13.2012-09:00
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Re: Multi Palette File format
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evil
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Oct,11.2012-15:29
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Re: Multi Palette File format
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zerkman
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Oct,11.2012-16:57
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Re: Multi Palette File format
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evil
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Oct,11.2012-18:41
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Re: Multi Palette File format
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s_t_s
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Oct,14.2012-15:58
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Re: Multi Palette File format
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Petari
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Dec,07.2012-15:40
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What's the anti-troll code?
That's your personal code to be able to add comments and messages on the dhs.nu site.
Don't have a code or forgot it? Fix it here.
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