LearnBoost/node-canvas — pull request #381 by mojodna (2014-02-09 21:59:16+00:00)
Title: Distinguish between 'add' and 'lighter'

When `CAIRO_OPERATOR_ADD` and `CAIRO_OPERATOR_LIGHTEN` are both available, make `CAIRO_OPERATOR_ADD` available as 'add' (it's currently hidden).