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[indic-table] Speed up lookup

This commit is contained in:
Behdad Esfahbod 2014-06-20 15:12:49 -04:00
parent 64442a3f4c
commit 65ac2dae4f
2 changed files with 59 additions and 24 deletions
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12
src/gen-indic-table.py
View File

@ -194,11 +194,23 @@ print
print "INDIC_TABLE_ELEMENT_TYPE"
print "hb_indic_get_categories (hb_codepoint_t u)"
print "{"
print " switch (u >> 12)"
print " {"
pages = set([u>>12 for u in starts+ends+singles.keys()])
for p in pages:
print " case 0x%0X:" % p
for (start,end) in zip (starts, ends):
if p not in [start>>12, end>>12]: continue
offset = "indic_offset_0x%04x" % start
print " if (0x%04X <= u && u <= 0x%04X) return indic_table[u - 0x%04X + %s];" % (start, end, start, offset)
for u,d in singles.items ():
if p != u>>12: continue
print " if (unlikely (u == 0x%04X)) return _(%s,%s);" % (u, short[0][d[0]], short[1][d[1]])
print " break;"
print ""
print " default:"
print " break;"
print " }"
print " return _(x,x);"
print "}"
print

27
src/hb-ot-shape-complex-indic-table.cc
View File

@ -732,25 +732,48 @@ static const INDIC_TABLE_ELEMENT_TYPE indic_table[] = {
INDIC_TABLE_ELEMENT_TYPE
hb_indic_get_categories (hb_codepoint_t u)
{
switch (u >> 12)
{
case 0x0:
if (0x0900 <= u && u <= 0x0EE0) return indic_table[u - 0x0900 + indic_offset_0x0900];
if (0x0F40 <= u && u <= 0x0FC0) return indic_table[u - 0x0F40 + indic_offset_0x0f40];
if (unlikely (u == 0x00A0)) return _(CP,x);
break;
case 0x1:
if (0x1000 <= u && u <= 0x10A0) return indic_table[u - 0x1000 + indic_offset_0x1000];
if (0x1700 <= u && u <= 0x17E0) return indic_table[u - 0x1700 + indic_offset_0x1700];
if (0x1900 <= u && u <= 0x1A80) return indic_table[u - 0x1900 + indic_offset_0x1900];
if (0x1B00 <= u && u <= 0x1C50) return indic_table[u - 0x1B00 + indic_offset_0x1b00];
if (0x1CF0 <= u && u <= 0x1CF8) return indic_table[u - 0x1CF0 + indic_offset_0x1cf0];
break;
case 0x2:
if (unlikely (u == 0x25CC)) return _(CP,x);
break;
case 0xA:
if (0xA800 <= u && u <= 0xA8C8) return indic_table[u - 0xA800 + indic_offset_0xa800];
if (0xA908 <= u && u <= 0xA9C8) return indic_table[u - 0xA908 + indic_offset_0xa908];
if (0xAA00 <= u && u <= 0xAAF8) return indic_table[u - 0xAA00 + indic_offset_0xaa00];
if (0xABC0 <= u && u <= 0xABF0) return indic_table[u - 0xABC0 + indic_offset_0xabc0];
break;
case 0x10:
if (0x10A00 <= u && u <= 0x10A40) return indic_table[u - 0x10A00 + indic_offset_0x10a00];
break;
case 0x11:
if (0x11000 <= u && u <= 0x11048) return indic_table[u - 0x11000 + indic_offset_0x11000];
if (0x11080 <= u && u <= 0x110C0) return indic_table[u - 0x11080 + indic_offset_0x11080];
if (0x11100 <= u && u <= 0x11138) return indic_table[u - 0x11100 + indic_offset_0x11100];
if (0x11180 <= u && u <= 0x111C8) return indic_table[u - 0x11180 + indic_offset_0x11180];
if (0x11680 <= u && u <= 0x116B8) return indic_table[u - 0x11680 + indic_offset_0x11680];
if (unlikely (u == 0x00A0)) return _(CP,x);
if (unlikely (u == 0x25CC)) return _(CP,x);
break;
default:
break;
}
return _(x,x);
}