Add autocrop

[alphaonex86]

Hello,
As gimp, can you add auto crop to crop the empty (no object, no tile, no image, ...) and useless border.
It's more fast to map than select only the util zone and crop the selected zone.
Cheers,

[bjorn]

While this sounds useful, I would personally prefer to implement "auto-growing" functionality instead. But of course auto-crop would be much easier to implement and something I may even have time for eventually.

[ketanhwr]

The simple solution would be to resize the map based on (minX,minY) to (maxX,maxY), right? (Where min and max would be based on extreme coordinates of any placed tile.)

Altough I'm a bit confused as in how this would work when we're using multiple layers.

[bjorn]

Although I'm a bit confused as in how this would work when we're using multiple layers.

You could just go through all layers and compute min/max based on that, but that won't work very nicely when in the future we decouple layer size and tile size from the map.

But, I just checked what GIMP does and actually it crops the image only based on the currently selected layer. So, surely that is acceptable behavior as well.

Then, the only remaining question is how to treat object layers. We could either just not support this option for now, or determine the boundaries of the objects on the current object layer and then somehow mapping that also to any potential tile layers. I think at first we could just disable this action when an object layer is selected.

[ketanhwr]

Yes, alright. So I'll add an Autocrop option in the same menu where the resize menu is placed. What should be the suitable shortcut key for this, if needed?

[bjorn]

What should be the suitable shortcut key for this, if needed?

I think it is a quite specific and rare action, so no shortcut is needed. GIMP also doesn't have a shortcut for it.