First-line indentation is very common in typesetting, and looks like this:

   The first line starts
further to the right than
the subsequent lines of
text.

It would be wonderful if fontdue could support it, e.g. with a simple first_line_indentation: f32 in LayoutSettings, especially if this is simple to implement. Of course the setting only makes sense for HorizontalAlign::Left.

I am writing an immediate mode GUI and this would enable me to seemlessly mix text with others widgets (in a row-based fashion). Basically I would use first_line_indentation to indicate that I've already used up the first few pixels of the first line (maybe there is a button there or some other text using a different font).