The FreeType Project - Bugs: bug #50832, [gvar] Interpolation of untouched...
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bug #50832: [gvar] Interpolation of untouched points
Submitter: | Sascha Brawer <saschabrawer> | ||
Submitted: | Wed 19 Apr 2017 01:45:16 PM UTC | ||
Severity: | 3 - Normal | Item Group: | None |
Status: | Fixed | Privacy: | Public |
Assigned to: | wl | Open/Closed: | Closed |
Planned Release: | 2.8 |
Tue 02 May 2017 01:17:57 PM UTC, comment #4: |
Sascha Brawer <saschabrawer> |
Tue 02 May 2017 12:41:29 PM UTC, comment #3: I've applied Behdad's patch. Thanks! |
Werner LEMBERG <wl> |
Thu 20 Apr 2017 09:30:21 PM UTC, comment #2: This is still being decided in the working group, but we have almost reached agreement, that if the two points with deltas on the two sides have the same coordinate, then inferred delta for the untouched point should be zero. That's what Apple's implementation does right now. |
Behdad Esfahbod <behdad> |
Thu 20 Apr 2017 08:55:32 PM UTC, comment #1: Behdad, Sascha, do you know which implementation does the right thing? |
Werner LEMBERG <wl> |
Wed 19 Apr 2017 01:45:16 PM UTC, original submission:
When points are not touched by gvar interpolation deltas, FreeType currently gives a slightly different result than CoreText.
|
Sascha Brawer <saschabrawer> |
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Follow 7 latest changes.
Date | Changed by | Updated Field | Previous Value | => | Replaced by |
---|---|---|---|---|---|
2017-05-02 | wl | Assigned to | tetisoft | wl | |
2017-05-02 | wl | Status | Need Info | Fixed | |
Assigned to | None | tetisoft | |||
Open/Closed | Open | Closed | |||
Planned Release | None | 2.8 | |||
2017-04-20 | wl | Status | None | Need Info | |
Carbon-Copy | - | Added behdad |
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Corresponding source code
Thank you! Tests are now passing:
https://rawgit.com/unicode-org/text-rendering-tests/master/reports/FreeStack.html#GVAR-8
https://rawgit.com/unicode-org/text-rendering-tests/master/reports/FreeStack.html#GVAR-9