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Add lookup_map

This commit is contained in:
Behdad Esfahbod 2010-05-20 15:14:44 +01:00
parent 60010a0c4d
commit 6b1b957f6d
1 changed files with 33 additions and 15 deletions
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48
src/hb-ot-shape.cc
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@ -42,29 +42,45 @@ hb_tag_t default_features[] = {
HB_TAG('m','k','m','k'),
};
struct lookup_map {
unsigned int index;
hb_mask_t mask;
};
static void
add_feature (hb_face_t *face,
hb_tag_t table_tag,
unsigned int feature_index,
unsigned int *lookups,
hb_mask_t mask,
lookup_map *lookups,
unsigned int *num_lookups,
unsigned int room_lookups)
{
unsigned int i = room_lookups - *num_lookups;
lookups += *num_lookups;
unsigned int *lookup_indices = (unsigned int *) lookups;
hb_ot_layout_feature_get_lookup_indexes (face, table_tag, feature_index, 0,
&i,
lookups + *num_lookups);
lookup_indices);
*num_lookups += i;
while (i--) {
lookups[i].mask = mask;
lookups[i].index = lookup_indices[i];
}
}
static int
cmp_lookups (const void *p1, const void *p2)
{
unsigned int a = * (const unsigned int *) p1;
unsigned int b = * (const unsigned int *) p2;
const lookup_map *a = (const lookup_map *) p1;
const lookup_map *b = (const lookup_map *) p2;
return a - b;
return a->index - b->index;
}
static void
@ -73,7 +89,7 @@ setup_lookups (hb_face_t *face,
hb_feature_t *features,
unsigned int num_features,
hb_tag_t table_tag,
unsigned int *lookups,
lookup_map *lookups,
unsigned int *num_lookups)
{
unsigned int i, j, script_index, language_index, feature_index, room_lookups;
@ -90,14 +106,14 @@ setup_lookups (hb_face_t *face,
if (hb_ot_layout_language_get_required_feature_index (face, table_tag, script_index, language_index,
&feature_index))
add_feature (face, table_tag, feature_index, lookups, num_lookups, room_lookups);
add_feature (face, table_tag, feature_index, 1, lookups, num_lookups, room_lookups);
for (i = 0; i < ARRAY_LENGTH (default_features); i++)
{
if (hb_ot_layout_language_find_feature (face, table_tag, script_index, language_index,
default_features[i],
&feature_index))
add_feature (face, table_tag, feature_index, lookups, num_lookups, room_lookups);
add_feature (face, table_tag, feature_index, 1, lookups, num_lookups, room_lookups);
}
for (i = 0; i < num_features; i++)
@ -105,7 +121,7 @@ setup_lookups (hb_face_t *face,
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, lookups, num_lookups, room_lookups);
add_feature (face, table_tag, feature_index, 1, lookups, num_lookups, room_lookups);
}
qsort (lookups, *num_lookups, sizeof (lookups[0]), cmp_lookups);
@ -113,9 +129,11 @@ setup_lookups (hb_face_t *face,
if (*num_lookups)
{
for (i = 1, j = 0; i < *num_lookups; i++)
if (lookups[i] != lookups[j])
if (lookups[i].index != lookups[j].index)
lookups[++j] = lookups[i];
lookups[j++] = lookups[i - 1];
else
lookups[j].mask |= lookups[i].mask;
j++;
*num_lookups = j;
}
}
@ -128,7 +146,7 @@ _hb_ot_substitute_complex (hb_font_t *font HB_UNUSED,
hb_feature_t *features,
unsigned int num_features)
{
unsigned int lookups[1000];
lookup_map lookups[1000];
unsigned int num_lookups = ARRAY_LENGTH (lookups);
unsigned int i;
@ -140,7 +158,7 @@ _hb_ot_substitute_complex (hb_font_t *font HB_UNUSED,
lookups, &num_lookups);
for (i = 0; i < num_lookups; i++)
hb_ot_layout_substitute_lookup (face, buffer, lookups[i], 1);
hb_ot_layout_substitute_lookup (face, buffer, lookups[i].index, lookups[i].mask);
return TRUE;
}
@ -152,7 +170,7 @@ _hb_ot_position_complex (hb_font_t *font,
hb_feature_t *features,
unsigned int num_features)
{
unsigned int lookups[1000];
lookup_map lookups[1000];
unsigned int num_lookups = ARRAY_LENGTH (lookups);
unsigned int i;
@ -164,7 +182,7 @@ _hb_ot_position_complex (hb_font_t *font,
lookups, &num_lookups);
for (i = 0; i < num_lookups; i++)
hb_ot_layout_position_lookup (font, face, buffer, lookups[i], 1);
hb_ot_layout_position_lookup (font, face, buffer, lookups[i].index, lookups[i].mask);
hb_ot_layout_position_finish (font, face, buffer);