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[lao] Decompose and reorder U+0EB3 around U+0EBB

This commit is contained in:
David Corbett 2022-06-26 21:44:51 -04:00 committed by Behdad Esfahbod
parent d3308f4713
commit 04c4767150
2 changed files with 9 additions and 4 deletions
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5
src/hb-algs.hh
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@ -857,6 +857,11 @@ hb_in_ranges (T u, T lo1, T hi1, T lo2, T hi2, T lo3, T hi3)
{
return hb_in_range (u, lo1, hi1) || hb_in_range (u, lo2, hi2) || hb_in_range (u, lo3, hi3);
}
template <typename T> static inline bool
hb_in_ranges (T u, T lo1, T hi1, T lo2, T hi2, T lo3, T hi3, T lo4, T hi4)
{
return hb_in_range (u, lo1, hi1) || hb_in_range (u, lo2, hi2) || hb_in_range (u, lo3, hi3) || hb_in_range (u, lo4, hi4);
}
/*

8
src/hb-ot-shaper-thai.cc
View File

@ -279,7 +279,7 @@ preprocess_text_thai (const hb_ot_shape_plan_t *plan,
* to be what Uniscribe and other engines implement. According to Eric Muller:
*
* When you have a SARA AM, decompose it in NIKHAHIT + SARA AA, *and* move the
* NIKHAHIT backwards over any above-base marks (0E31, 0E34-0E37, 0E47-0E4E).
* NIKHAHIT backwards over any above-base marks.
*
* <0E14, 0E4B, 0E33> -> <0E14, 0E4D, 0E4B, 0E32>
*
@ -308,8 +308,8 @@ preprocess_text_thai (const hb_ot_shape_plan_t *plan,
* Nikhahit: U+0E4D U+0ECD
*
* Testing shows that Uniscribe reorder the following marks:
* Thai: <0E31,0E34..0E37,0E47..0E4E>
* Lao: <0EB1,0EB4..0EB7,0EC7..0ECE>
* Thai: <0E31,0E34..0E37, 0E47..0E4E>
* Lao: <0EB1,0EB4..0EB7,0EBB,0EC8..0ECD>
*
* Note how the Lao versions are the same as Thai + 0x80.
*/
@ -319,7 +319,7 @@ preprocess_text_thai (const hb_ot_shape_plan_t *plan,
#define IS_SARA_AM(x) (((x) & ~0x0080u) == 0x0E33u)
#define NIKHAHIT_FROM_SARA_AM(x) ((x) - 0x0E33u + 0x0E4Du)
#define SARA_AA_FROM_SARA_AM(x) ((x) - 1)
#define IS_ABOVE_BASE_MARK(x) (hb_in_ranges<hb_codepoint_t> ((x) & ~0x0080u, 0x0E34u, 0x0E37u, 0x0E47u, 0x0E4Eu, 0x0E31u, 0x0E31u))
#define IS_ABOVE_BASE_MARK(x) (hb_in_ranges<hb_codepoint_t> ((x) & ~0x0080u, 0x0E34u, 0x0E37u, 0x0E47u, 0x0E4Eu, 0x0E31u, 0x0E31u, 0x0E3Bu, 0x0E3Bu))
buffer->clear_output ();
unsigned int count = buffer->len;