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Re: [Dvipng] Different image dimensions between dvipng 1.14 and 1.15

From: Jan-Åke Larsson
Subject: Re: [Dvipng] Different image dimensions between dvipng 1.14 and 1.15
Date: Sun, 6 Jan 2019 10:56:10 +0000
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.2.1

Dear Markus,

As far as I understand, Freetype uses the native hinter (OS hinter, I believe), but I do not know much, this is outside of my expertise. See e.g. https://www.freetype.org/freetype2/docs/text-rendering-general.html

Any changes in the manual will have to wait until I do a new release, and that will only happen if there are security issues found. I have precious little time for these hobby projects nowadays. Hopefully people can find this discussion in the mailing list archives for the time being.


On 2019-01-06 11:46, Markus Triska wrote:
Dear Jan-Åke,

perfect, this worked, thank you very much!

Do you have a guess why FreeType handles this differently on different
platforms? This is a severe drawback in my view, because I need
pixelwise identical results. I realize this is somewhat outside the
scope of dvipng, yet also important because using FreeType is the
default, and the manual strongly encourages it.

This is clearly a use case that benefits much from --freetype0.  Would
you please consider adding a note about such cases to the manual, or
(of course even better) consider a way to make dvipng obtain identical
results even when FreeType and its antialiasing is enabled?

Thank you and all the best!

Dvipng mailing list
Jan-Åke Larsson
Professor, Head of Department

Linköping University
Department of Electrical Engineering
SE-581 83 Linköping
Phone: +46 (0)13-28 14 68
Mobile: +46 (0)13-28 14 68
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