Padding support

[brandonjpierce]

First off, excellent library, it has worked really well for us! One small need we have is actually applying a 1-2px padding around each icon. While this can be done at the SVG asset level we found it is a little easier to blanket apply it at the time of spritesheet generation. Current thought is a --spacing=1 flag or similar that would apply padding around each asset for the defined value.

[flother]

I don't think this would be too difficult: once the SVG has been rasterised as a Pixmap, it could then be redrawn into a buffered Pixmap (buffered by the number of padding pixels required). But I'm wondering what need you have that can't be handled by the icon-padding property. Are you able to share more details about your use-case?

[brandonjpierce]

Almost less of a use case and more of a workaround for poorly exported assets. We have found on occasion that Figma, depending on how the vector is constructed, will sometimes export a SVG somewhat poorly which can result in a sort of sub-pixeling effect. Having the ability to add a 1-2px spacing around each icons accommodates for that. When drawing sprites to webgl for instance if the sub-pixeling is occurring you will see icons "bleeding" into one another just slightly.

[flother]

Am I right to say that Spritesmith's padding option is exactly the sort of thing you're after? For example, padding: 2 means there will be a 2px gap to the right and bottom of each image in the spritesheet.

(Not saying you should switch to Spritesmith, just wondering if that's the functionality you want to duplicate.)

[brandonjpierce]

@flother precisely!