[Octave-bug-tracker] [bug #45494] Patches have spurious (antialising) lines in vector printout

[Pantxo Diribarne]

Follow-up Comment #21, bug #45494 (project octave):

@Dan:
>> Can we pin-point where exactly the issue is? It's a lot of work to build
OpenGL/Mesa from scratch and convince developers there is something to fix.

I think there is nothing to fix on the mesa side: the on-screen and raster
offscreen images don't show these artificial lines. AFAIU it is pdf/eps
rasterization libraries that need a fix: you could try to find how to
implement a better anti-aliasing algorithm (that doesn't take background
colors into account when two foreground polygons, triangles or not, are
adjacent) and submit it to libpoppler/xpdf developpers.

>> Is there the possibility of "covering-up" the tessellation lines by drawing
lines the same color as the patch after the convex shapes have been drawn?

How would you handle two adjacent polygons with different colors?  

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