ggblend
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mjskay
Support for blend modes in ggplot2
Would be helpful to folks to have somewhere to point folks to help them configure a graphics device that supports blending. Maybe a mini vignette. - [ ] a list...
Also from [Paul Murrell's doc](https://www.stat.auckland.ac.nz/~paul/Reports/GraphicsEngine/groups/groups.html) it would be nice to implement affine transforms like scale, translate, shear, rotate. These should also obey the new `partition()` operation (as `blend()` does).
Certain blend ops (e.g. `"atop"`) can only be applied to pairs of grobs using `grid::groupGrob(src, op, dst)` instead of `grid::groupGrob(src, op)` where `src` is (say) a `grobTree` or some other...
More musings: maybe this really needs to turn into more of a vector algebra... e.g. vectors of layers. Because what you really want to be able to do for something...
This might be too difficult, but I was wondering if legend keys could also demonstrate blending where applicable? So geom_smooth is an example of where this would be useful ```...
