pouët.net

leonard information 329 glöps

• general:
• level: user
• personal:
• first name: Arnaud
• last name: Carré

• demotool Windows AmigAtari Bitmap Converter by Oxygene [web]
• For info, abc has now a Mac and Linux port!
• isokadded on the 2026-03-28 15:03:37
• 4k procedural graphics Amiga AGA Amiga OCS/ECS Domina Nebula by Alcatraz [web]
• really nice 4k picture! should have won against some PC pictures also! :)
• rulezadded on the 2026-03-26 23:32:57
• demo Amiga OCS/ECS +=+ by Spreadpoint [web]
• I like the atmosphere! and Audiomonster is back, yeah!
• rulezadded on the 2026-03-01 19:32:30
• demo Amiga OCS/ECS Bacon of Hope by Desire [web]
• It's not often you can see both a very well designed demo AND very impressive code! What an amount of work put in there. My fave A500 demo for a while!
• rulezadded on the 2026-01-25 10:57:08
• 32k Amiga OCS/ECS R4aCPC by Virgill [web] & Alcatraz [web]
• really impressive music player! congrats guys!
• rulezadded on the 2026-01-24 22:57:24
• demotool Windows Atari ST Amiga AGA Atari STe Amiga OCS/ECS Atari TT 030 L-Packer by Oxygene [web]
• v0.94 is out. Please update. (It fixes a memory heap corruption on amiga version)
• isokadded on the 2025-12-31 14:32:47
• 64k Amiga AGA Amiga OCS/ECS Let it code by New Generation Crew
• nice little christmas intro with funny chip tune! +1 for using L-Packer :)
• rulezadded on the 2025-12-30 00:39:01
• demotool Windows Atari ST Amiga AGA Atari STe Amiga OCS/ECS Atari TT 030 L-Packer by Oxygene [web]
• just released v0.93: added LZ4 algorithm, and also option to force one algo as suggested
• isokadded on the 2025-12-27 18:17:57
• demotool Windows Atari ST Amiga AGA Atari STe Amiga OCS/ECS Atari TT 030 L-Packer by Oxygene [web]
• Quote:

  Speaking of ZX0, I find it quite amazing that it often beats DEFLATE even without entropy coding of literals. Just goes to show how awful DEFLATE is. ;)

  
  
  Agree, zx0 is really impressive considering no entropy coding.
  
  
  Quote:

  With a decompressor size of just 78 bytes, I would guess it can sometimes be competitive at the very low end, like 1k, especially if you add a mode without relocation support, like Shrinkler's MINI mode. I have been contemplating using it (or something like it) for bootblocks.

  
  
  I didn't thought about very low end like 1k. Your shrinkler is already so good at these tiny size. Like, shrinkler is unbeatable for 4KiB. But maybe zx0+no-relocation could beat shrinkler for 1KiB in few cases, idk.
  
  
  Quote:

  How often do you see DEFLATE having a size advantage over ZX0 for 64k when the decruncher size is taken into account?

  
  
  On several amiga exe, I noticed DEFLATE beats ZX0 in almost 70% of case (very rough estimation out of my head). Note I'm talking about the final exe size, including the decruncher indeed
  But strangely, when testing on few atari PRG, ZX0 version generally beats deflate.
  
  Regarding DEFLATE, I think it's still a very good algorithm for its age. Like, standard ZIP libs aren't so great but google ZOPFLI library is quite nice. When I try to repack my "cycle-op" amiga demo with ZX0, it doesn't fit on the 880KiB disk anymore (original cycle-op is packed with ARJ-M7). When I re-pack cycle-op using DEFLATE & zopfli library, I get 56KiB free space on the disk!!! (instead of few bytes with ARJ-M7). quite impressive.
  
  
  Quote:

  Feature request: manual choice of compression algorithm. Presumably, DEFLATE decompresses much slower than ZX0, so I wouldn't want that to be picked by accident.

  
  
  you can already use this simple hack: just use high target size like -t800 for 800KiB, and it will generally choose ZX0. But yeah a manual choice option will be better, I'll add that.
  
  
  Quote:

  Which other compression algorithms are you considering?

  
  
  Not so many. DEFLATE+zopfli already beats all "huffman entropy" coders of the same league. So I think I'll just add LZ4, when you can afford very low packing ratio but ultra fast depacking.
  
  Any other algorithm suggestion?
• isokadded on the 2025-12-26 13:33:16
• 64k Amiga OCS/ECS Disiplin by Spaceballs [web]
• Awesome intro! I love the wireframe cube fx!
• rulezadded on the 2025-12-06 20:03:10