Add internal hb_ot_shape_context_t
This commit is contained in:
Behdad Esfahbod
parent
3eb936f153
commit
967240dd8b
@ -24,13 +24,7 @@
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* Google Author(s): Behdad Esfahbod
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*/
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#include "hb-ot-shape.h"
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#include "hb-buffer-private.hh"
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#include "hb-open-type-private.hh"
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#include "hb-ot-layout.h"
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#include "hb-ot-shape-private.h"
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HB_BEGIN_DECLS
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@ -676,18 +670,14 @@ static const struct arabic_state_table_entry {
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void
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_hb_ot_analyze_complex_arabic (hb_font_t *font,
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hb_face_t *face,
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hb_buffer_t *buffer,
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hb_feature_t *features HB_UNUSED,
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unsigned int num_features HB_UNUSED)
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_hb_ot_analyze_complex_arabic (hb_ot_shape_context_t *c)
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{
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unsigned int count = buffer->len;
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unsigned int count = c->buffer->len;
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unsigned int prev = 0, state = 0;
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for (unsigned int i = 0; i < count; i++) {
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unsigned int this_type = get_joining_type (buffer->info[i].codepoint, buffer->unicode->v.get_general_category (buffer->info[i].codepoint));
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unsigned int this_type = get_joining_type (c->buffer->info[i].codepoint, c->buffer->unicode->v.get_general_category (c->buffer->info[i].codepoint));
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if (unlikely (this_type == JOINING_TYPE_T))
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continue;
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@ -695,21 +685,21 @@ _hb_ot_analyze_complex_arabic (hb_font_t *font,
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const arabic_state_table_entry *entry = arabic_state_table[state];
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if (entry->prev_action != NONE)
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buffer->info[prev].gproperty = entry->prev_action;
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c->buffer->info[prev].gproperty = entry->prev_action;
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buffer->info[i].gproperty = entry->curr_action;
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c->buffer->info[i].gproperty = entry->curr_action;
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prev = i;
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state = entry->next_state;
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}
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hb_mask_t mask_array[TOTAL_NUM_FEATURES] = {0};
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unsigned int num_masks = buffer->props.script == HB_SCRIPT_SYRIAC ? SYRIAC_NUM_FEATURES : COMMON_NUM_FEATURES;
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unsigned int num_masks = c->buffer->props.script == HB_SCRIPT_SYRIAC ? SYRIAC_NUM_FEATURES : COMMON_NUM_FEATURES;
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for (unsigned int i = 0; i < num_masks; i++)
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mask_array[i] = 0 /* XXX find_mask */;
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for (unsigned int i = 0; i < count; i++)
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buffer->info[i].mask |= mask_array[buffer->info[i].gproperty];
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c->buffer->info[i].mask |= mask_array[c->buffer->info[i].gproperty];
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}
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@ -24,9 +24,7 @@
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* Red Hat Author(s): Behdad Esfahbod
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*/
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#include "hb-ot-shape.h"
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#include "hb-buffer-private.hh"
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#include "hb-ot-shape-private.h"
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#include "hb-open-type-private.hh"
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@ -230,31 +228,27 @@ struct hb_mask_allocator_t {
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};
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static void
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setup_lookups (hb_face_t *face,
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hb_buffer_t *buffer,
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hb_feature_t *features,
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unsigned int num_features,
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hb_tag_t table_tag,
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lookup_map *lookups,
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unsigned int *num_lookups,
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hb_direction_t original_direction)
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setup_lookups (hb_ot_shape_context_t *c,
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hb_tag_t table_tag,
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lookup_map *lookups,
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unsigned int *num_lookups)
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{
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unsigned int i, j, script_index, language_index, feature_index, room_lookups;
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room_lookups = *num_lookups;
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*num_lookups = 0;
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hb_ot_layout_table_choose_script (face, table_tag,
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hb_ot_tags_from_script (buffer->props.script),
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hb_ot_layout_table_choose_script (c->face, table_tag,
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hb_ot_tags_from_script (c->buffer->props.script),
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&script_index);
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hb_ot_layout_script_find_language (face, table_tag, script_index,
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hb_ot_tag_from_language (buffer->props.language),
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hb_ot_layout_script_find_language (c->face, table_tag, script_index,
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hb_ot_tag_from_language (c->buffer->props.language),
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&language_index);
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hb_mask_allocator_t allocator;
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switch (original_direction) {
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switch (c->original_direction) {
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case HB_DIRECTION_LTR:
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allocator.add_feature (HB_TAG ('l','t','r','a'), 1, true);
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allocator.add_feature (HB_TAG ('l','t','r','m'), 1, true);
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@ -274,40 +268,40 @@ setup_lookups (hb_face_t *face,
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/* XXX complex-shaper features go here */
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for (unsigned int i = 0; i < num_features; i++) {
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const hb_feature_t *feature = &features[i];
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for (unsigned int i = 0; i < c->num_features; i++) {
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const hb_feature_t *feature = &c->features[i];
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allocator.add_feature (feature->tag, feature->value, (feature->start == 0 && feature->end == (unsigned int) -1));
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}
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/* Compile features */
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allocator.compile (face, table_tag, script_index, language_index);
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allocator.compile (c->face, table_tag, script_index, language_index);
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/* Gather lookup indices for features and set buffer masks at the same time */
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if (hb_ot_layout_language_get_required_feature_index (face, table_tag, script_index, language_index,
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if (hb_ot_layout_language_get_required_feature_index (c->face, table_tag, script_index, language_index,
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&feature_index))
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add_feature (face, table_tag, feature_index, 1, lookups, num_lookups, room_lookups);
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add_feature (c->face, table_tag, feature_index, 1, lookups, num_lookups, room_lookups);
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const hb_mask_allocator_t::feature_map_t *map;
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hb_mask_t global_mask = allocator.get_global_mask ();
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if (global_mask)
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buffer->set_masks (global_mask, global_mask, 0, (unsigned int) -1);
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c->buffer->set_masks (global_mask, global_mask, 0, (unsigned int) -1);
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switch (original_direction) {
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switch (c->original_direction) {
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case HB_DIRECTION_LTR:
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map = allocator.find_feature (HB_TAG ('l','t','r','a'));
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add_feature (face, table_tag, map->index, map->mask, lookups, num_lookups, room_lookups);
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add_feature (c->face, table_tag, map->index, map->mask, lookups, num_lookups, room_lookups);
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map = allocator.find_feature (HB_TAG ('l','t','r','m'));
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add_feature (face, table_tag, map->index, map->mask, lookups, num_lookups, room_lookups);
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add_feature (c->face, table_tag, map->index, map->mask, lookups, num_lookups, room_lookups);
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break;
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case HB_DIRECTION_RTL:
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map = allocator.find_feature (HB_TAG ('r','t','l','a'));
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add_feature (face, table_tag, map->index, map->mask, lookups, num_lookups, room_lookups);
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add_feature (c->face, table_tag, map->index, map->mask, lookups, num_lookups, room_lookups);
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map = allocator.find_feature (HB_TAG ('r','t','l','m'));
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add_feature (face, table_tag, map->index, map->mask, lookups, num_lookups, room_lookups);
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add_feature (c->face, table_tag, map->index, map->mask, lookups, num_lookups, room_lookups);
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break;
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case HB_DIRECTION_TTB:
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case HB_DIRECTION_BTT:
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@ -318,16 +312,16 @@ setup_lookups (hb_face_t *face,
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for (i = 0; i < ARRAY_LENGTH (default_features); i++)
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{
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map = allocator.find_feature (default_features[i]);
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add_feature (face, table_tag, map->index, map->mask, lookups, num_lookups, room_lookups);
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add_feature (c->face, table_tag, map->index, map->mask, lookups, num_lookups, room_lookups);
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}
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for (i = 0; i < num_features; i++)
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for (i = 0; i < c->num_features; i++)
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{
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hb_feature_t *feature = &features[i];
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hb_feature_t *feature = &c->features[i];
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map = allocator.find_feature (feature->tag);
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add_feature (face, table_tag, map->index, map->mask, lookups, num_lookups, room_lookups);
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add_feature (c->face, table_tag, map->index, map->mask, lookups, num_lookups, room_lookups);
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if (!(feature->start == 0 && feature->end == (unsigned int)-1))
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buffer->set_masks (features[i].value << map->shift, map->mask, feature->start, feature->end);
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c->buffer->set_masks (feature->value << map->shift, map->mask, feature->start, feature->end);
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}
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@ -348,58 +342,44 @@ setup_lookups (hb_face_t *face,
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}
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static hb_bool_t
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hb_ot_substitute_complex (hb_font_t *font HB_UNUSED,
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hb_face_t *face,
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hb_buffer_t *buffer,
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hb_feature_t *features,
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unsigned int num_features,
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hb_direction_t original_direction)
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static void
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hb_ot_substitute_complex (hb_ot_shape_context_t *c)
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{
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lookup_map lookups[1000]; /* FIXME */
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unsigned int num_lookups = ARRAY_LENGTH (lookups);
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unsigned int i;
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if (!hb_ot_layout_has_substitution (face))
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return FALSE;
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if (!hb_ot_layout_has_substitution (c->face))
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return;
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setup_lookups (face, buffer, features, num_features,
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HB_OT_TAG_GSUB,
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lookups, &num_lookups,
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original_direction);
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setup_lookups (c, HB_OT_TAG_GSUB, lookups, &num_lookups);
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for (i = 0; i < num_lookups; i++)
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hb_ot_layout_substitute_lookup (face, buffer, lookups[i].index, lookups[i].mask);
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hb_ot_layout_substitute_lookup (c->face, c->buffer, lookups[i].index, lookups[i].mask);
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return TRUE;
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c->applied_substitute_complex = TRUE;
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return;
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}
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static hb_bool_t
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hb_ot_position_complex (hb_font_t *font,
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hb_face_t *face,
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hb_buffer_t *buffer,
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hb_feature_t *features,
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unsigned int num_features,
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hb_direction_t original_direction)
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static void
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hb_ot_position_complex (hb_ot_shape_context_t *c)
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{
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lookup_map lookups[1000];
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lookup_map lookups[1000]; /* FIXME */
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unsigned int num_lookups = ARRAY_LENGTH (lookups);
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unsigned int i;
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if (!hb_ot_layout_has_positioning (face))
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return FALSE;
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if (!hb_ot_layout_has_positioning (c->face))
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return;
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setup_lookups (face, buffer, features, num_features,
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HB_OT_TAG_GPOS,
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lookups, &num_lookups,
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original_direction);
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setup_lookups (c, HB_OT_TAG_GPOS, lookups, &num_lookups);
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for (i = 0; i < num_lookups; i++)
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hb_ot_layout_position_lookup (font, face, buffer, lookups[i].index, lookups[i].mask);
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hb_ot_layout_position_lookup (c->font, c->face, c->buffer, lookups[i].index, lookups[i].mask);
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hb_ot_layout_position_finish (font, face, buffer);
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hb_ot_layout_position_finish (c->font, c->face, c->buffer);
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return TRUE;
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c->applied_position_complex = TRUE;
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return;
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}
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@ -424,20 +404,18 @@ hb_form_clusters (hb_buffer_t *buffer)
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buffer->info[i].cluster = buffer->info[i - 1].cluster;
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}
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static hb_direction_t
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static void
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hb_ensure_native_direction (hb_buffer_t *buffer)
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{
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hb_direction_t original_direction = buffer->props.direction;
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hb_direction_t direction = buffer->props.direction;
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/* TODO vertical */
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if (HB_DIRECTION_IS_HORIZONTAL (original_direction) &&
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original_direction != _hb_script_get_horizontal_direction (buffer->props.script))
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if (HB_DIRECTION_IS_HORIZONTAL (direction) &&
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direction != _hb_script_get_horizontal_direction (buffer->props.script))
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{
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hb_buffer_reverse_clusters (buffer);
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buffer->props.direction = HB_DIRECTION_REVERSE (buffer->props.direction);
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}
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return original_direction;
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}
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@ -487,21 +465,13 @@ hb_map_glyphs (hb_font_t *font,
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}
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static void
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hb_substitute_default (hb_font_t *font,
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hb_face_t *face,
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hb_buffer_t *buffer,
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hb_feature_t *features HB_UNUSED,
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unsigned int num_features HB_UNUSED)
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hb_substitute_default (hb_ot_shape_context_t *c)
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{
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hb_map_glyphs (font, face, buffer);
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hb_map_glyphs (c->font, c->face, c->buffer);
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}
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static void
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hb_substitute_complex_fallback (hb_font_t *font HB_UNUSED,
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hb_face_t *face HB_UNUSED,
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hb_buffer_t *buffer HB_UNUSED,
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hb_feature_t *features HB_UNUSED,
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unsigned int num_features HB_UNUSED)
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hb_substitute_complex_fallback (hb_ot_shape_context_t *c HB_UNUSED)
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{
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/* TODO Arabic */
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}
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@ -510,66 +480,94 @@ hb_substitute_complex_fallback (hb_font_t *font HB_UNUSED,
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/* Position */
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static void
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hb_position_default (hb_font_t *font,
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hb_face_t *face,
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hb_buffer_t *buffer,
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hb_feature_t *features HB_UNUSED,
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unsigned int num_features HB_UNUSED)
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hb_position_default (hb_ot_shape_context_t *c)
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{
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hb_buffer_clear_positions (buffer);
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hb_buffer_clear_positions (c->buffer);
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unsigned int count = buffer->len;
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unsigned int count = c->buffer->len;
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for (unsigned int i = 0; i < count; i++) {
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hb_glyph_metrics_t metrics;
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hb_font_get_glyph_metrics (font, face, buffer->info[i].codepoint, &metrics);
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buffer->pos[i].x_advance = metrics.x_advance;
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buffer->pos[i].y_advance = metrics.y_advance;
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hb_font_get_glyph_metrics (c->font, c->face, c->buffer->info[i].codepoint, &metrics);
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c->buffer->pos[i].x_advance = metrics.x_advance;
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c->buffer->pos[i].y_advance = metrics.y_advance;
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}
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}
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static void
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hb_position_complex_fallback (hb_font_t *font HB_UNUSED,
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hb_face_t *face HB_UNUSED,
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hb_buffer_t *buffer HB_UNUSED,
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hb_feature_t *features HB_UNUSED,
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unsigned int num_features HB_UNUSED)
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hb_position_complex_fallback (hb_ot_shape_context_t *c HB_UNUSED)
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{
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/* TODO Mark pos */
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}
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static void
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hb_truetype_kern (hb_font_t *font,
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hb_face_t *face,
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hb_buffer_t *buffer,
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hb_feature_t *features HB_UNUSED,
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unsigned int num_features HB_UNUSED)
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hb_truetype_kern (hb_ot_shape_context_t *c)
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{
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/* TODO Check for kern=0 */
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unsigned int count = buffer->len;
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unsigned int count = c->buffer->len;
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for (unsigned int i = 1; i < count; i++) {
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hb_position_t kern, kern1, kern2;
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kern = hb_font_get_kerning (font, face, buffer->info[i - 1].codepoint, buffer->info[i].codepoint);
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kern = hb_font_get_kerning (c->font, c->face, c->buffer->info[i - 1].codepoint, c->buffer->info[i].codepoint);
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kern1 = kern >> 1;
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kern2 = kern - kern1;
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buffer->pos[i - 1].x_advance += kern1;
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buffer->pos[i].x_advance += kern2;
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buffer->pos[i].x_offset += kern2;
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c->buffer->pos[i - 1].x_advance += kern1;
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c->buffer->pos[i].x_advance += kern2;
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c->buffer->pos[i].x_offset += kern2;
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}
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}
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static void
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hb_position_complex_fallback_visual (hb_font_t *font,
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hb_face_t *face,
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hb_buffer_t *buffer,
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hb_feature_t *features,
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unsigned int num_features)
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hb_position_complex_fallback_visual (hb_ot_shape_context_t *c)
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{
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hb_truetype_kern (font, face, buffer, features, num_features);
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hb_truetype_kern (c);
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}
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/* Do it! */
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static void
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hb_ot_shape_internal (hb_ot_shape_context_t *c)
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{
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hb_form_clusters (c->buffer);
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/* SUBSTITUTE */
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{
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c->buffer->clear_masks ();
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/* Mirroring needs to see the original direction */
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hb_mirror_chars (c->buffer);
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hb_ensure_native_direction (c->buffer);
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hb_substitute_default (c);
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hb_ot_substitute_complex (c);
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if (!c->applied_substitute_complex)
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hb_substitute_complex_fallback (c);
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}
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/* POSITION */
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{
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c->buffer->clear_masks ();
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hb_position_default (c);
|
||||
|
||||
hb_ot_position_complex (c);
|
||||
|
||||
hb_bool_t position_fallback = !c->applied_position_complex;
|
||||
if (position_fallback)
|
||||
hb_position_complex_fallback (c);
|
||||
|
||||
if (HB_DIRECTION_IS_BACKWARD (c->buffer->props.direction))
|
||||
hb_buffer_reverse (c->buffer);
|
||||
|
||||
if (position_fallback)
|
||||
hb_position_complex_fallback_visual (c);
|
||||
}
|
||||
|
||||
c->buffer->props.direction = c->original_direction;
|
||||
}
|
||||
|
||||
void
|
||||
hb_ot_shape (hb_font_t *font,
|
||||
hb_face_t *face,
|
||||
@ -577,47 +575,12 @@ hb_ot_shape (hb_font_t *font,
|
||||
hb_feature_t *features,
|
||||
unsigned int num_features)
|
||||
{
|
||||
hb_direction_t original_direction;
|
||||
hb_bool_t substitute_fallback, position_fallback;
|
||||
hb_ot_shape_context_t c = {font, face, buffer, features, num_features};
|
||||
|
||||
hb_form_clusters (buffer);
|
||||
/* Setup transient context members */
|
||||
c.original_direction = buffer->props.direction;
|
||||
|
||||
/* SUBSTITUTE */
|
||||
{
|
||||
buffer->clear_masks ();
|
||||
|
||||
/* Mirroring needs to see the original direction */
|
||||
hb_mirror_chars (buffer);
|
||||
|
||||
original_direction = hb_ensure_native_direction (buffer);
|
||||
|
||||
hb_substitute_default (font, face, buffer, features, num_features);
|
||||
|
||||
substitute_fallback = !hb_ot_substitute_complex (font, face, buffer, features, num_features, original_direction);
|
||||
|
||||
if (substitute_fallback)
|
||||
hb_substitute_complex_fallback (font, face, buffer, features, num_features);
|
||||
}
|
||||
|
||||
/* POSITION */
|
||||
{
|
||||
buffer->clear_masks ();
|
||||
|
||||
hb_position_default (font, face, buffer, features, num_features);
|
||||
|
||||
position_fallback = !hb_ot_position_complex (font, face, buffer, features, num_features, original_direction);
|
||||
|
||||
if (position_fallback)
|
||||
hb_position_complex_fallback (font, face, buffer, features, num_features);
|
||||
|
||||
if (HB_DIRECTION_IS_BACKWARD (buffer->props.direction))
|
||||
hb_buffer_reverse (buffer);
|
||||
|
||||
if (position_fallback)
|
||||
hb_position_complex_fallback_visual (font, face, buffer, features, num_features);
|
||||
}
|
||||
|
||||
buffer->props.direction = original_direction;
|
||||
hb_ot_shape_internal (&c);
|
||||
}
|
||||
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user