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| Computers Forum Index » Computer - Fonts » TTX "improving" a font... |
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| TheFontGuy... |
 Posted: Thu Jun 18, 2009 6:09 pm |
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Guest
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I've tried running a few fonts through TTX and back and have noticed a
few puzzling changes:
(1) All the glyph bounding boxes get recalculated, often to 15% to
25% smaller than original.
(2) The numberOfHMetrics value in one font got changed from 141 to
140.
The questions are:
(1) Can shrinking the bounding boxes cause any compatibility problems
with old apps that may have been fine-tuned to use the older, sloppier
boxes?
(2) Any idea why TTX would compute a different number of Glyphs than
in the original TT font file?
Any answers appreciated.
Regards,
George |
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| JosephKK... |
| Posted: Mon Jul 13, 2009 5:16 am |
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Guest
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On Thu, 18 Jun 2009 11:09:47 -0700 (PDT), TheFontGuy
<georgeg at (no spam) dessci.com> wrote:
Quote: I've tried running a few fonts through TTX and back and have noticed a
few puzzling changes:
(1) All the glyph bounding boxes get recalculated, often to 15% to
25% smaller than original.
(2) The numberOfHMetrics value in one font got changed from 141 to
140.
The questions are:
(1) Can shrinking the bounding boxes cause any compatibility problems
with old apps that may have been fine-tuned to use the older, sloppier
boxes?
(2) Any idea why TTX would compute a different number of Glyphs than
in the original TT font file?
Any answers appreciated.
Regards,
George
Not that i know jack all about the subject, but:
(1) you might see a greater average number of words per line if the
bounding boxes shrink.
(2) i suppose that it is possible that it could "merge" two blank
glyphs. I have seen more than one case where there are multiple
glyphs for many given codons. Thus, in principle, i do not recommend
any program merging glyphs for different codons, the program may
mistake different space containing glyphs for non-space containing
glyphs. |
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