<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">The “compliance” talked about in the slides sounds a bit misguided.<div class=""><br class=""></div><div class="">The behavior specified by UAX #50 is a decent low-level default at most, and can’t address all the use cases. Therefore fonts naturally need to be diverse and address the flexibility required by typography.</div><div class=""><br class=""></div><div class="">The architectural problem is that, layout engines assume a predefined rotation property (based on UAX #50 or not) for characters, and there’s no reliable way to override that. The boundaries between rotated and upright runs even makes OTL a non-starter.</div><div class=""><br class=""></div><div class="">Therefore we need to define and implement a mechanism that allows layout engines to resolve a glyph’s rotation property based on both a predefined dataset *and* the current font’s overriding.<br class=""><div class="">
<br class="">Best,<br class="">梁海 Liang Hai<br class=""><a href="https://lianghai.github.io" class="">https://lianghai.github.io</a>
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<div><br class=""><blockquote type="cite" class=""><div class="">On Aug 6, 2020, at 07:37, MURATA Makoto <<a href="mailto:eb2m-mrt@asahi-net.or.jp" class="">eb2m-mrt@asahi-net.or.jp</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div dir="ltr" class="">Folks,<div class=""><br class=""></div><div class="">This presentation explains typical problems around interactions </div><div class="">of fonts and vertical writing.</div><div class=""><br class=""></div><div class=""><a href="https://1drv.ms/p/s!An5Z79wj5AZBgsdN2pd2XmS08WslZA?e=UM5O6K" class="">https://1drv.ms/p/s!An5Z79wj5AZBgsdN2pd2XmS08WslZA?e=UM5O6K</a></div><div class=""><br class=""></div><div style="background-color:transparent" class="">Japanese publishers are forced to use rasterized text, which hampers </div><div style="background-color:transparent" class="">accessibility. I hope that the activities planned here help to make </div><div style="background-color:transparent" class="">things better.</div><div style="background-color:transparent" class=""><br class=""></div><div class="">-- <br class="">Regards,<br class="">Makoto</div></div>
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