freetypy.Outline.embolden

Outline.embolden()

Embolden an outline. The new outline will be at most 4 times strength pixels wider and higher. You may think of the left and bottom borders as unchanged.

Negative strength values to reduce the outline thickness are possible also.

Parameters:

strength : float

How strong the glyph is emboldened.

Notes

The used algorithm to increase or decrease the thickness of the glyph doesn’t change the number of points; this means that certain situations like acute angles or intersections are sometimes handled incorrectly.

If you need ‘better’ metrics values you should call Outline.get_cbox or Outline.get_bbox.