Bug 71949

Summary:	Myanmar TONE MARK SGAW KAREN HATHI + ASAT results in dotted circle
Product:	HarfBuzz	Reporter:	Roozbeh Pournader <roozbeh>
Component:	src	Assignee:	Behdad Esfahbod <freedesktop>
Status:	VERIFIED FIXED	QA Contact:
Severity:	normal
Priority:	medium	CC:	freedesktop
Version:	unspecified
Hardware:	Other
OS:	All
Whiteboard:
i915 platform:		i915 features:

Description Roozbeh Pournader 2013-11-23 22:09:39 UTC

According to UTN #11, p. 33, the sequence U+1063, U+103A is used as a tone mark in Sgaw Karen, but HarfBuzz displays it as a dotted circle.

For example, try the sequence 1014,1062,1063,103A (NA + SGAW KAREN EU-MATRA + TONE MARK SGAW KAREN HATHI + ASAT) which according to UTN #11, p. 34, is valid Myanmar text.

Comment 1 Behdad Esfahbod 2013-11-25 23:02:54 UTC

commit d2da5e0b4b4ffc1722403ffb90b8777cfa1cd174
Author: Behdad Esfahbod <behdad@behdad.org>
Date:   Mon Nov 25 17:50:07 2013 -0500

    [myanmar] Relax pwo-tone group a bit
    
    This is broken sequence according to OpenType spec, Uniscribe,
    and current HarfBuzz implementation.  But Roozbeh says this
    is a valid sequence, so allow it.  There are multiple
    "(DB As?)?" constructs in the grammar, but Roozbeh thinks only
    this one needs changing.
    
    Test case: 1014,1063,103A
    
    Fixes https://bugs.freedesktop.org/show_bug.cgi?id=71949

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