[cairo] Motion blur with cairo, alpha add compositing operator

Plugin Everything jameswhiffin at gmail.com
Wed Jun 8 07:17:33 UTC 2022

Hello all

Apologies if this has been discussed before. I’d like to create the
appearance of motion blur by drawing multiple Cairo shapes at opacity of
1.0 / [number of motion blur samples]. In openGL or After Effects I would
set the blending to alpha add so that the final result retains its original
opacity. Is this possible in Cairo? I couldn’t find an equivalent
compositing operator. Keen to hear any workarounds or suggestions.


*James Whiffin* | *Developer*
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