HB_TAG('r','l','i','g')
};
-struct lookup_map {
- unsigned int index;
- hb_mask_t mask;
-};
-
-
-static void
-add_lookups (hb_face_t *face,
- hb_tag_t table_tag,
- unsigned int feature_index,
- 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,
- 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)
-{
- const lookup_map *a = (const lookup_map *) p1;
- const lookup_map *b = (const lookup_map *) p2;
-
- return a->index - b->index;
-}
+#define MAX_FEATURES 100 /* FIXME */
+#define MAX_LOOKUPS 1000 /* FIXME */
+static const hb_tag_t table_tags[2] = {HB_OT_TAG_GSUB, HB_OT_TAG_GPOS};
-#define MAX_FEATURES 100 /* FIXME */
struct hb_mask_allocator_t {
};
struct feature_map_t {
- hb_tag_t tag; /* should be first */
- unsigned int index;
+ hb_tag_t tag; /* should be first for our bsearch to work */
+ unsigned int index[2]; /* GSUB, GPOS */
unsigned int shift;
hb_mask_t mask;
}
};
- hb_mask_allocator_t (void) : count (0) {}
+ struct lookup_map_t {
+ unsigned int index;
+ hb_mask_t mask;
+
+ static int
+ cmp (const void *p1, const void *p2)
+ {
+ const lookup_map_t *a = reinterpret_cast<const lookup_map_t *>(p1);
+ const lookup_map_t *b = reinterpret_cast<const lookup_map_t *>(p2);
+
+ return a->index < b->index ? -1 : a->index > b->index ? 1 : 0;
+ }
+ };
+
+
+ void
+ add_lookups (hb_ot_shape_context_t *c,
+ unsigned int table_index,
+ unsigned int feature_index,
+ hb_mask_t mask)
+ {
+ unsigned int i = MAX_LOOKUPS - lookup_count[table_index];
+ lookup_map_t *lookups = lookup_maps[table_index] + lookup_count[table_index];
+
+ unsigned int *lookup_indices = (unsigned int *) lookups;
+
+ hb_ot_layout_feature_get_lookup_indexes (c->face,
+ table_tags[table_index],
+ feature_index,
+ 0, &i,
+ lookup_indices);
+
+ lookup_count[table_index] += i;
+
+ while (i--) {
+ lookups[i].mask = mask;
+ lookups[i].index = lookup_indices[i];
+ }
+ }
+
+
+
+
+ hb_mask_allocator_t (void) : feature_count (0) {}
void add_feature (hb_tag_t tag,
unsigned int value,
bool global)
{
- feature_info_t *info = &infos[count++];
+ feature_info_t *info = &feature_infos[feature_count++];
info->tag = tag;
info->value = value;
- info->seq = count;
+ info->seq = feature_count;
info->global = global;
}
- void compile (hb_face_t *face,
- hb_tag_t table_tag,
- unsigned int script_index,
- unsigned int language_index)
+ void compile (hb_ot_shape_context_t *c)
{
- global_mask = 0;
- unsigned int next_bit = 1;
+ global_mask = 0;
+ lookup_count[0] = lookup_count[1] = 0;
- if (!count)
+ if (!feature_count)
return;
- qsort (infos, count, sizeof (infos[0]), feature_info_t::cmp);
+ /* Fetch script/language indices for GSUB/GPOS. We need these later to skip
+ * features not available in either table and not waste precious bits for them. */
+
+ const hb_tag_t *script_tags;
+ hb_tag_t language_tag;
+
+ script_tags = hb_ot_tags_from_script (c->buffer->props.script);
+ language_tag = hb_ot_tag_from_language (c->buffer->props.language);
+
+ unsigned int script_index[2], language_index[2];
+ for (unsigned int table_index = 0; table_index < 2; table_index++) {
+ hb_tag_t table_tag = table_tags[table_index];
+ hb_ot_layout_table_choose_script (c->face, table_tag, script_tags, &script_index[table_index]);
+ hb_ot_layout_script_find_language (c->face, table_tag, script_index[table_index], language_tag, &language_index[table_index]);
+ }
+
+
+ /* Sort the features so we can bsearch later */
+ qsort (feature_infos, feature_count, sizeof (feature_infos[0]), feature_info_t::cmp);
+
+ /* Remove dups, let later-occurring features override earlier ones. */
unsigned int j = 0;
- for (unsigned int i = 1; i < count; i++)
- if (infos[i].tag != infos[j].tag)
- infos[++j] = infos[i];
+ for (unsigned int i = 1; i < feature_count; i++)
+ if (feature_infos[i].tag != feature_infos[j].tag)
+ feature_infos[++j] = feature_infos[i];
else {
- if (infos[i].global)
- infos[j] = infos[i];
+ if (feature_infos[i].global)
+ feature_infos[j] = feature_infos[i];
else {
- infos[j].global = infos[j].global && (infos[j].value == infos[i].value);
- infos[j].value = MAX (infos[j].value, infos[i].value);
+ feature_infos[j].global = feature_infos[j].global && (feature_infos[j].value == feature_infos[i].value);
+ feature_infos[j].value = MAX (feature_infos[j].value, feature_infos[i].value);
}
}
- count = j + 1;
+ feature_count = j + 1;
+
/* Allocate bits now */
+ unsigned int next_bit = 1;
j = 0;
- for (unsigned int i = 0; i < count; i++) {
- const feature_info_t *info = &infos[i];
+ for (unsigned int i = 0; i < feature_count; i++) {
+ const feature_info_t *info = &feature_infos[i];
unsigned int bits_needed;
if (!info->value || next_bit + bits_needed > 8 * sizeof (hb_mask_t))
continue; /* Feature disabled, or not enough bits. */
- unsigned int feature_index;
- if (!hb_ot_layout_language_find_feature (face, table_tag, script_index, language_index,
- info->tag, &feature_index))
+
+ bool found = false;
+ unsigned int feature_index[2];
+ for (unsigned int table_index = 0; table_index < 2; table_index++)
+ found |= hb_ot_layout_language_find_feature (c->face,
+ table_tags[table_index],
+ script_index[table_index],
+ language_index[table_index],
+ info->tag,
+ &feature_index[table_index]);
+ if (!found)
continue;
- feature_map_t *map = &maps[j++];
+
+ feature_map_t *map = &feature_maps[j++];
map->tag = info->tag;
- map->index = feature_index;
+ map->index[0] = feature_index[0];
+ map->index[1] = feature_index[1];
if (info->global && info->value == 1) {
- /* Use the global bit */
+ /* Uses the global bit */
map->shift = 0;
map->mask = 1;
} else {
map->shift = next_bit;
map->mask = (1 << (next_bit + bits_needed)) - (1 << next_bit);
next_bit += bits_needed;
+ if (info->global)
+ global_mask |= map->mask;
}
- if (info->global && map->mask != 1)
- global_mask |= map->mask;
}
- count = j;
- }
+ feature_count = j;
- hb_mask_t get_global_mask (void) { return global_mask; }
- const feature_map_t *get_features (unsigned int *num_features) const {
- *num_features = count;
- return maps;
+ for (unsigned int table_index = 0; table_index < 2; table_index++) {
+ hb_tag_t table_tag = table_tags[table_index];
+
+ /* Collect lookup indices for features */
+
+ unsigned int required_feature_index;
+ if (hb_ot_layout_language_get_required_feature_index (c->face,
+ table_tag,
+ script_index[table_index],
+ language_index[table_index],
+ &required_feature_index))
+ add_lookups (c, table_index, required_feature_index, 1);
+
+ for (unsigned i = 0; i < feature_count; i++)
+ add_lookups (c, table_index, feature_maps[i].index[table_index], feature_maps[i].mask);
+
+ /* Sort lookups and merge duplicates */
+
+ qsort (lookup_maps[table_index], lookup_count[table_index], sizeof (lookup_maps[table_index][0]), lookup_map_t::cmp);
+
+ if (lookup_count[table_index])
+ {
+ unsigned int j = 0;
+ for (unsigned int i = 1; i < lookup_count[table_index]; i++)
+ if (lookup_maps[table_index][i].index != lookup_maps[table_index][j].index)
+ lookup_maps[table_index][++j] = lookup_maps[table_index][i];
+ else
+ lookup_maps[table_index][j].mask |= lookup_maps[table_index][i].mask;
+ j++;
+ lookup_count[table_index] = j;
+ }
+ }
}
+ hb_mask_t get_global_mask (void) { return global_mask; }
const feature_map_t *find_feature (hb_tag_t tag) const {
- static const feature_map_t off_map = { HB_TAG_NONE, Index::NOT_FOUND_INDEX, 0, 0 };
- const feature_map_t *map = (const feature_map_t *) bsearch (&tag, maps, count, sizeof (maps[0]), feature_map_t::cmp);
+ static const feature_map_t off_map = { HB_TAG_NONE, {Index::NOT_FOUND_INDEX,Index::NOT_FOUND_INDEX}, 0, 0 };
+ const feature_map_t *map = (const feature_map_t *) bsearch (&tag, feature_maps, feature_count, sizeof (feature_maps[0]), feature_map_t::cmp);
return map ? map : &off_map;
}
+ void substitute (hb_ot_shape_context_t *c) const {
+ for (unsigned int i = 0; i < lookup_count[0]; i++)
+ hb_ot_layout_substitute_lookup (c->face, c->buffer, lookup_maps[0][i].index, lookup_maps[0][i].mask);
+ }
- private:
+ void position (hb_ot_shape_context_t *c) const {
+ for (unsigned int i = 0; i < lookup_count[1]; i++)
+ hb_ot_layout_position_lookup (c->font, c->face, c->buffer, lookup_maps[1][i].index, lookup_maps[1][i].mask);
+ }
- unsigned int count;
- feature_info_t infos[MAX_FEATURES];
+ private:
- feature_map_t maps[MAX_FEATURES];
hb_mask_t global_mask;
+
+ unsigned int feature_count;
+ feature_info_t feature_infos[MAX_FEATURES]; /* used before compile() only */
+ feature_map_t feature_maps[MAX_FEATURES];
+
+ lookup_map_t lookup_maps[2][MAX_LOOKUPS]; /* GSUB/GPOS */
+ unsigned int lookup_count[2];
};
static void
static void
hb_ot_shape_setup_lookups (hb_ot_shape_context_t *c,
- lookup_map *lookups,
- unsigned int *num_lookups)
+ hb_mask_allocator_t *allocator)
{
- hb_mask_allocator_t allocator;
-
- hb_ot_shape_collect_features (c, &allocator);
+ hb_ot_shape_collect_features (c, allocator);
/* Compile features */
- unsigned int script_index, language_index, feature_index;
- unsigned int room_lookups;
-
- hb_ot_layout_table_choose_script (c->face, c->table_tag,
- hb_ot_tags_from_script (c->buffer->props.script),
- &script_index);
- hb_ot_layout_script_find_language (c->face, c->table_tag, script_index,
- hb_ot_tag_from_language (c->buffer->props.language),
- &language_index);
-
- allocator.compile (c->face, c->table_tag, script_index, language_index);
-
-
- /* Gather lookup indices for features */
-
- room_lookups = *num_lookups;
- *num_lookups = 0;
-
- if (hb_ot_layout_language_get_required_feature_index (c->face, c->table_tag, script_index, language_index,
- &feature_index))
- add_lookups (c->face, c->table_tag, feature_index, 1, lookups, num_lookups, room_lookups);
-
- const hb_mask_allocator_t::feature_map_t *map;
- unsigned int num_features;
-
- map = allocator.get_features (&num_features);
- for (unsigned i = 0; i < num_features; i++)
- add_lookups (c->face, c->table_tag, map[i].index, map[i].mask, lookups, num_lookups, room_lookups);
-
- /* Sort lookups and merge duplicates */
-
- qsort (lookups, *num_lookups, sizeof (lookups[0]), cmp_lookups);
-
- if (*num_lookups)
- {
- unsigned int j = 0;
- for (unsigned int i = 1; i < *num_lookups; i++)
- if (lookups[i].index != lookups[j].index)
- lookups[++j] = lookups[i];
- else
- lookups[j].mask |= lookups[i].mask;
- j++;
- *num_lookups = j;
- }
-
+ allocator->compile (c);
/* Set masks in buffer */
- hb_mask_t global_mask = allocator.get_global_mask ();
+ hb_mask_t global_mask = allocator->get_global_mask ();
if (global_mask)
c->buffer->set_masks (global_mask, global_mask, 0, (unsigned int) -1);
for (unsigned int i = 0; i < c->num_features; i++)
{
hb_feature_t *feature = &c->features[i];
- map = allocator.find_feature (feature->tag);
+ const hb_mask_allocator_t::feature_map_t *map = allocator->find_feature (feature->tag);
if (!(feature->start == 0 && feature->end == (unsigned int)-1))
c->buffer->set_masks (feature->value << map->shift, map->mask, feature->start, feature->end);
}
static void
-hb_ot_substitute_complex (hb_ot_shape_context_t *c)
+hb_ot_substitute_complex (hb_ot_shape_context_t *c,
+ const hb_mask_allocator_t *allocator)
{
- lookup_map lookups[1000]; /* FIXME */
- unsigned int num_lookups = ARRAY_LENGTH (lookups);
-
if (!hb_ot_layout_has_substitution (c->face))
return;
- c->table_tag = HB_OT_TAG_GSUB;
-
- hb_ot_shape_setup_lookups (c, lookups, &num_lookups);
-
- for (unsigned int i = 0; i < num_lookups; i++)
- hb_ot_layout_substitute_lookup (c->face, c->buffer, lookups[i].index, lookups[i].mask);
+ allocator->substitute (c);
c->applied_substitute_complex = TRUE;
return;
}
static void
-hb_ot_position_complex (hb_ot_shape_context_t *c)
+hb_ot_position_complex (hb_ot_shape_context_t *c,
+ const hb_mask_allocator_t *allocator)
{
- lookup_map lookups[1000]; /* FIXME */
- unsigned int num_lookups = ARRAY_LENGTH (lookups);
if (!hb_ot_layout_has_positioning (c->face))
return;
- c->table_tag = HB_OT_TAG_GPOS;
-
- hb_ot_shape_setup_lookups (c, lookups, &num_lookups);
-
- for (unsigned int i = 0; i < num_lookups; i++)
- hb_ot_layout_position_lookup (c->font, c->face, c->buffer, lookups[i].index, lookups[i].mask);
+ allocator->position (c);
hb_ot_layout_position_finish (c->font, c->face, c->buffer);
static void
hb_ot_shape_internal (hb_ot_shape_context_t *c)
{
+ hb_mask_allocator_t allocator;
+
+ hb_ot_shape_setup_lookups (c, &allocator);
+
+
hb_form_clusters (c->buffer);
/* SUBSTITUTE */
hb_substitute_default (c);
- hb_ot_substitute_complex (c);
+ hb_ot_substitute_complex (c, &allocator);
if (!c->applied_substitute_complex)
hb_substitute_complex_fallback (c);
hb_position_default (c);
- hb_ot_position_complex (c);
+ hb_ot_position_complex (c, &allocator);
hb_bool_t position_fallback = !c->applied_position_complex;
if (position_fallback)
projects / platform / upstream / libHarfBuzzSharp.git / commitdiff