Add output format (PNG, SVG, JPG)

[k1LoW]

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[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (master@50a5115). Click here to learn what that means.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master     #169   +/-   ##
=========================================
  Coverage          ?   69.27%           
=========================================
  Files             ?       15           
  Lines             ?     2802           
  Branches          ?        0           
=========================================
  Hits              ?     1941           
  Misses            ?      663           
  Partials          ?      198

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