DMG Levels

[akrabu]

Hello! I was wondering what algorithm / compression levels the DMG slider corresponded to. I was hoping to make several LZFSE DMG's but am not sure what corresponds to what. Also if LZFSE isn't an option... it would be cool if LZFSE (ULFO) and LZMA (ULMO) were added below "Use Bzip2 compression" (or perhaps have a selector for the algorithm of choice).

[aonez]

Currently those are the levels of compression, using zlib (GZIP by default, you can use BZIP2 if checked):

• Store: no compression, read-only image
• Fastest: 1
• Fast: 4
• Normal: 6
• Slow: 8
• Slowest: 9

I'll take a look and probably add support to those formats, since I'm seeing BZIP2 is being deprecated.

[aonez]

Sadly I'm not seeing any level customisation using these formats.

[akrabu]

Ahh no, LZFSE and LZVN don't have any levels. Maybe make it so you could check LZFSE and it grays out the slider when you do??

[aonez]

It will be like this

[akrabu]

This is exactly what I envisioned. Looks great! I'll start testing it out now. :)

[akrabu]

Out of curiosity, what does the slider actually do when LZFSE is selected? I think UDZO (zlib) is the only ones with compression levels... I don't even see UDBZ (Bzip2) as having levels in the man page? 🤔

Should the slider just be greyed out for formats that don't support levels?

[aonez]

In fact here it is: Keka-v1.2.62.r5161

[aonez]

It should be greyed out on all formats but ZLIB and BZIP2, it isn’t for you? The level setting only works with ZLIB and BZIP2 (this one I found out there, bzip2-level). They both are 0-9 levels. But BZIP2 0 level is kind of a default, not “no compression”.

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On Fri, 21 Apr 2023 at 22:22 Akrabu ***@***.***> wrote: Out of curiosity, what does the slider actually do when LZFSE is selected? I think UDZO (zlib) is the only ones with compression levels... I don't even see UDBZ (Bzip2) as having levels in the man page? 🤔 Should the slider just be greyed out for formats that don't support levels? — Reply to this email directly, view it on GitHub <#1226 (reply in thread)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AADVHIZUTNJJUVBOZYWQUM3XCLT73ANCNFSM6AAAAAAVRWMICQ> . You are receiving this because you commented.Message ID: ***@***.***>

[akrabu]

Oh that's weird. It wasn't, but now it is. See here https://v.usetapes.com/ohJu5WtxwO

I'll play with it and see if I can't get it to bug out again.

[akrabu]

Oh. If you close it with LZFSE selected, and reopen it - it's slidable.

[aonez]

Indeed! Fixed that :)