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Don't allocate bits for features not available

This commit is contained in:
Behdad Esfahbod 2010-05-21 13:33:46 +01:00
parent e53d77142a
commit 4a9a5c0b06
1 changed files with 6 additions and 4 deletions
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10
src/hb-ot-shape.cc
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@ -125,6 +125,11 @@ setup_lookups (hb_face_t *face,
unsigned int global_values = 0;
for (i = 0; i < num_features; i++)
{
if (!hb_ot_layout_language_find_feature (face, table_tag, script_index, language_index,
features[i].tag,
&feature_index))
continue;
unsigned int bits_needed = _hb_bit_storage (features[i].value);
if (!bits_needed)
continue;
@ -132,10 +137,7 @@ setup_lookups (hb_face_t *face,
unsigned int value = features[i].value << last_bit_used;
last_bit_used += bits_needed;
if (hb_ot_layout_language_find_feature (face, table_tag, script_index, language_index,
features[i].tag,
&feature_index))
add_feature (face, table_tag, feature_index, mask, lookups, num_lookups, room_lookups);
add_feature (face, table_tag, feature_index, mask, lookups, num_lookups, room_lookups);
if (features[i].start == 0 && features[i].end == (unsigned int)-1)
global_values |= value;