[NTG-context] LuaTeX and PDF.js

Vedran Miletić vedran at miletic.net
Fri Jan 8 11:25:46 CET 2021

08. 01. 2021. u 05:41, Aditya Mahajan piše:
> On Fri, 8 Jan 2021, Hans Hagen wrote:
>> On 1/8/2021 12:39 AM, Vedran Miletić wrote:
>>> It's whatever ConTeXt standalone has. I don't have any extra Lua installed:
>> --credits should mention the lua version
>>> Should I see it on non-HiDPI as well? Because it seems it's there.
>> depends on what you consider (non) hdpi ... the positioning of glyphs
>> depends on font scale, rounding of stems and such (hints in fonts but
>> these get less relevant with high res displays), caching, inter glyph
>> corrections (that pdftex/luatex/...) put in the text stream to resync
>> within certain tolerances, etc ... (often a print is a better reference
>> as displays are seldom 600+ dpi) .. it's also why often expansion looks
>> bad on screen because even a sub percentage difference can give such
>> effects
> Another way to see it is just zoom in on the PDF. If the artifacts go away on zooming in, then they are due to anti-aliasing.
> Aditya
Thanks to both of you for the detailed explanations. Printed page shows 
no artifacts and neither does PDF.js when the text is zoomed. So it is 
an issue with anti-aliasing after all.

I'll report it to PDF.js and see what they tell me.


Vedran Miletić

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