Add shortcuts to toggle antialiasing

[Aloso]

This adds shortcuts to toggle antialiasing. The current value is stored in the cache file. There are three possible values:

• always – turn antialiasing on
• never – turn antialiasing off
• auto – antialiasing depends on the zoom factor

There are two new key bindings:

• toggle_antialias (default S): Sets antialiasing to always or never
• automatic_antialias (default Alt+S): Sets antialiasing to auto

The cfg.toml has a new setting image.antialiasing, which can have the following values:

• always, never, auto – see above
• previous – restores the setting from the last session

Closes #26

[ArturKovacs]

This is cool

[ArturKovacs]

I like that this always sets to autmatic no matter what. This helps combat that sometimes the difference is barely noticable even if a changed happened in filtering.

[ArturKovacs]

Thanks you, this is nice; there are a few things I'd like to add

• Currently this only applies to magnificaiton. I'm wondering if it would be a good idea to apply this to minification as well.
• I think that there could be a cfg field for remembering the aa setting. For example I would like to have the aa set to auto every time I open an emulsion window. But I understand that it can be more preferabble to use the previous aa setting.
• I like the initiative to more compactly fit the contents of the usage panel; but for me the previous layout was definitely cleaner. I'd prefer if you'd just make a page size in the odt a bit taller to accomodate the new rows. Of course if we reach a point where there are too many items to fit vertically, we'll have to find a new alternative but right now I can't think of anything that would be clean and more compact.

[Aloso]

Currently this only applies to magnificaiton. I'm wondering if it would be a good idea to apply this to minification as well.

How do you mean? When pressing S, antialiasing is toggled irrespective of the zoom level. Or do you mean something different?

I think that there could be a cfg field for remembering the aa setting.

Now that I think of it, I agree that using cfg.toml would be better than cache.toml.

I like the initiative to more compactly fit the contents of the usage panel; but for me the previous layout was definitely cleaner.

I'll change it back then.

[ArturKovacs]

What I meant by minification was that when the image is shrunk we still use smoothing even if aa is off. But I honestly don't know if anyone would want to turn that off so let's just leave it as it is. If someone needs that, they'll open an issue.

Now that I think of it, I agree that using config.toml would be better than cache.toml.

To clarify, I was thinking of using both. The cache would remain the way you made it and the cfg would have an optional field called use_last_aa which is a bool which is false by default. It's also because emulsion shouldn't write to the cfg file.

[Aloso]

@ArturKovacs I think I addressed all of your concerns.

[ArturKovacs]

Thanks!