[Poppler-bugs] [Bug 18379] Okular's poppler-qt4 renders poorlier than Evince's Cairo

[bugzilla-daemon at freedesktop.org]

http://bugs.freedesktop.org/show_bug.cgi?id=18379





--- Comment #17 from Benoit Jacob <jacob.benoit.1 at gmail.com>  2009-09-30 16:02:10 PST ---
Also, regarding Namus's attached screenshot.

I agree that for me too, as a non-Chinese, it is hard to judge which one "looks
better".

But now that I've fixed the bug, I can tell what's the difference. The top
image shows rendering with no hinting at all. You can see that the curves look
smooth and natural, but a little bit fuzzy. The bottom image shows rendering
with hinting (either auto-hinting or native "bytecode" hinting, that I don't
know). Consequently, the curves look crisp, but are a bit distorted to fit the
pixel grid, and also the thickness of the curves is often rounded to the
nearest multiple of 1 pixel. Even not knowing anything about Chinese writing,
it's easy to guess that it destroys the calligraphic properties of the font.

Hinting is a trade-off: with hinting, you lose accuracy and naturality of the
curves, in order to gain crispness. And apparently, for Namus, that's not a
good deal.


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