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I wrote:
Next steps (again, help much appreciated!):

- add more GraphicPrimitive generators, complete up to a state that
  the filter at least covers what the current direct canvas renderer
  delivers:
   * clip regions
   * text rendering - it's parsed, but graphic primitive generation is
     missing
   * gradients/hatches

That's now done to a point where we're ~on par with the old renderer's
functionality - thx to Patrick, Noel and Armin for all the nice work!

- once this works, cut over to new impl, bin the old code in cppcanvas
  (there's sadly a small amount of duplicate code now in the parsers)
- iteratively expand, to cover near-100% of EMF+ (mostly lacking around
  gradients & effects):
   * more complex fill types like bitmaps/tiles
   * path gradient
   * xor & stuff

That cut-over has now happened with

https://cgit.freedesktop.org/libreoffice/core/commit/?id=ebc11ae0b132eefd3b1b1a837a8d0ad3ba73b460

, also killing the functionality to compare the two renderers - if you
still need that, it's a rather smallish revert for now.

Next up is cleansing the old renderer under cppcanvas, I suspect
there's some easy wins there for easy hackers. :)

Cheers,

-- Thorsten

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