[Fontconfig-bugs] [Bug 106219] RBGA Order options for moden panels (Pentile, RGBG, OLED)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=106219

--- Comment #5 from Redsandro <freedesktop at redsandro.e4ward.com> ---
I'm using the grayscale antialiasing, because the RGBA has terrible fringing
(due to the mismatch in subpixel layout).

However, text in grayscale antialiasing is fringing too - green on top and red
on bottom.

I think the answer to "does it look significantly better" depends on who you
ask. Perhaps a designer would say yes more often than a programmer.

Playing with freetype only makes sense if I can insert a custom rasterization
matrix somewhere. And in order to figure out this matrix, I need to investigate
the subpixel layout. Microscopic image is not irrelevant, unless you propose a
bruteforce approach to finding the optimal matrix.

Aside from fonts, I'm also interested to see if there are facilities for
pixel-precise postprocessing when rendering the desktop, since thin horizontal
lines also have fringing. Basically every hard edge on a dark block on a light
background is green on top and purple on bottom. A subpixel-aware opposite of
sharpening would fix this.

I have the eye, the equipment and a theoretical understanding of what needs to
happen. I don't have the technical understanding of where I can try this out or
whom to talk to; as in someone who is interested in improving this too.

So I'm guessing I should take this issue to the freetype bugtracker? If it
comes to an implementation, I go back here?

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