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mwichary's profile
Marcin Wichary
Marcin Wichary
Marcin Wichary
@mwichary

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Marcin Wichary

@mwichary

Writing a book about the history of keyboards: http://aresluna.org/shift-happens  · Design manager @figmadesign · Typographer · Occasional speaker · He/him

San Francisco, Calif.
Joined October 2009

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    1. Marcin Wichary‏ @mwichary 2 May 2020
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      Replying to @aaronbell

      Thanks for this. Just to clarify: for this fonts, the metrics seem identical across three options, is that correct? (total: 2457)

      1 reply 0 retweets 0 likes
    2. Aaron Bell‏ @aaronbell 2 May 2020
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      Replying to @mwichary

      The total height (including line height) is the same, but the distribution is different.pic.twitter.com/wwd4i0nCd5

      2 replies 0 retweets 1 like
    3. Tiro Typeworks‏ @TiroTypeworks 2 May 2020
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      Replying to @aaronbell @mwichary

      I usually only set the use typo metrics flag in fonts fir which I need to differ the linespacing from the clipping metrics, usually because the latter need to be huge. As I recall, Cambria Math was the first font to use that flag.

      2 replies 0 retweets 1 like
    4. Aaron Bell‏ @aaronbell 2 May 2020
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      Replying to @TiroTypeworks @mwichary

      Yeah, Cambria Math is a pretty extreme case. Most fonts probably don’t *need* it set to render well enough (since applications fiddle around with line heights as it is), but I think it is generally worth setting. Otherwise we’ll never escape winAscent / winDescent.

      1 reply 0 retweets 1 like
    5. Christoph Koeberlin‏ @koeberlin 2 May 2020
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      Replying to @aaronbell @TiroTypeworks @mwichary

      Seems to cause more trouble than it helps, unfortunately. Thinking about removing it from my mastering process.

      2 replies 0 retweets 0 likes
    6. Tiro Typeworks‏ @TiroTypeworks 2 May 2020
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      Replying to @koeberlin @aaronbell @mwichary

      There's no universally compatible way to set font vertical metrics, only 'best practices' that favour one or another compromise. My starting point for any project is to make the , three sets of metrics sum to the same height, at which point I don't need to set the flag. /1

      1 reply 0 retweets 0 likes
    7. Tiro Typeworks‏ @TiroTypeworks 2 May 2020
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      Replying to @TiroTypeworks @koeberlin and

      I set the TypoAscender and TypoDescender to sum to the UPM body height, which means default leading is expressed using the TypoLinegap value. /2

      1 reply 0 retweets 0 likes
    8. Tiro Typeworks‏ @TiroTypeworks 2 May 2020
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      Replying to @TiroTypeworks @koeberlin and

      So long as doing so won't result in clipping, I then set the WinAscent and WinDescent metrics to sum to the same height as the combined Typo metrics, providing Windows compatibility regardless of which set of metrics are used for linespacing. /3

      1 reply 0 retweets 0 likes
    9. Tiro Typeworks‏ @TiroTypeworks 2 May 2020
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      Replying to @TiroTypeworks @koeberlin and

      But a pretty frequent aspect of my work involves adding script support to existing fonts, and this sometimes involves introducing glyphs that exceed the existing WinAscent and WinDescent values. So unless I can change those metrics, those glyphs will get clipped. /4

      1 reply 0 retweets 0 likes
    10. Tiro Typeworks‏ @TiroTypeworks 2 May 2020
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      Replying to @TiroTypeworks @koeberlin and

      So the use typo metrics flag is pretty much the only chance to maybe, in some environments, maintain backwards compatible linespacing and also avoid clipping. It isn't implemented as widely or as well as it should be after 15 years, but it's still the only option. /5

      2 replies 0 retweets 0 likes
      Marcin Wichary‏ @mwichary 2 May 2020
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      Replying to @TiroTypeworks @koeberlin @aaronbell

      This is a very useful explanation, thank you.

      9:12 AM - 2 May 2020
      0 replies 0 retweets 0 likes

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