/*
- * Copyright (C) 2009,2010 Red Hat, Inc.
- * Copyright (C) 2010 Google, Inc.
+ * Copyright © 2009,2010 Red Hat, Inc.
+ * Copyright © 2010,2011 Google, Inc.
*
* This is part of HarfBuzz, a text shaping library.
*
* Google Author(s): Behdad Esfahbod
*/
-#include "hb-ot-shape-private.h"
+#include "hb-ot-shape-private.hh"
+#include "hb-ot-shape-complex-private.hh"
-#include "hb-open-type-private.hh"
-
-#include "hb-ot-layout.h"
+#include "hb-font-private.hh"
HB_BEGIN_DECLS
-/* XXX vertical */
-hb_tag_t default_features[] = {
- HB_TAG('c','a','l','t'),
+hb_tag_t common_features[] = {
HB_TAG('c','c','m','p'),
- HB_TAG('c','l','i','g'),
- HB_TAG('c','s','w','h'),
- HB_TAG('c','u','r','s'),
- HB_TAG('k','e','r','n'),
- HB_TAG('l','i','g','a'),
HB_TAG('l','o','c','l'),
HB_TAG('m','a','r','k'),
HB_TAG('m','k','m','k'),
- HB_TAG('r','l','i','g')
+ HB_TAG('r','l','i','g'),
};
-#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};
-
-
-struct hb_mask_allocator_t {
-
- struct feature_info_t {
- hb_tag_t tag;
- unsigned int value;
- unsigned int seq;
- bool global;
-
- static int
- cmp (const void *p1, const void *p2)
- {
- const feature_info_t *a = reinterpret_cast<const feature_info_t *>(p1);
- const feature_info_t *b = reinterpret_cast<const feature_info_t *>(p2);
-
- if (a->tag != b->tag)
- return a->tag < b->tag ? -1 : 1;
-
- return a->seq < b->seq ? -1 : 1;
- }
- };
-
- struct feature_map_t {
- 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;
-
- static int
- cmp (const void *p1, const void *p2)
- {
- const feature_map_t *a = reinterpret_cast<const feature_map_t *>(p1);
- const feature_map_t *b = reinterpret_cast<const feature_map_t *>(p2);
-
- return a->tag < b->tag ? -1 : a->tag > b->tag ? 1 : 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 = &feature_infos[feature_count++];
- info->tag = tag;
- info->value = value;
- info->seq = feature_count;
- info->global = global;
- }
-
- void compile (hb_ot_shape_context_t *c)
- {
- global_mask = 0;
- lookup_count[0] = lookup_count[1] = 0;
-
- if (!feature_count)
- return;
-
-
- /* 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 < feature_count; i++)
- if (feature_infos[i].tag != feature_infos[j].tag)
- feature_infos[++j] = feature_infos[i];
- else {
- if (feature_infos[i].global)
- feature_infos[j] = feature_infos[i];
- else {
- 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);
- }
- }
- feature_count = j + 1;
-
-
- /* Allocate bits now */
- unsigned int next_bit = 1;
- j = 0;
- for (unsigned int i = 0; i < feature_count; i++) {
- const feature_info_t *info = &feature_infos[i];
-
- unsigned int bits_needed;
-
- if (info->global && info->value == 1)
- /* Uses the global bit */
- bits_needed = 0;
- else
- bits_needed = _hb_bit_storage (info->value);
-
- if (!info->value || next_bit + bits_needed > 8 * sizeof (hb_mask_t))
- continue; /* Feature disabled, or not enough bits. */
-
-
- 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 = &feature_maps[j++];
-
- map->tag = info->tag;
- map->index[0] = feature_index[0];
- map->index[1] = feature_index[1];
- if (info->global && info->value == 1) {
- /* 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;
- }
-
- }
- feature_count = j;
-
-
- 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,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);
- }
-
- 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);
- }
-
- private:
-
- 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];
+hb_tag_t horizontal_features[] = {
+ HB_TAG('c','a','l','t'),
+ HB_TAG('c','l','i','g'),
+ HB_TAG('c','u','r','s'),
+ HB_TAG('k','e','r','n'),
+ HB_TAG('l','i','g','a'),
+};
- lookup_map_t lookup_maps[2][MAX_LOOKUPS]; /* GSUB/GPOS */
- unsigned int lookup_count[2];
+/* Note:
+ * Technically speaking, vrt2 and vert are mutually exclusive.
+ * According to the spec, valt and vpal are also mutually exclusive.
+ * But we apply them all for now.
+ */
+hb_tag_t vertical_features[] = {
+ HB_TAG('v','a','l','t'),
+ HB_TAG('v','e','r','t'),
+ HB_TAG('v','k','r','n'),
+ HB_TAG('v','p','a','l'),
+ HB_TAG('v','r','t','2'),
};
static void
-hb_ot_shape_collect_features (hb_ot_shape_context_t *c,
- hb_mask_allocator_t *allocator)
+hb_ot_shape_collect_features (hb_ot_shape_planner_t *planner,
+ const hb_segment_properties_t *props,
+ const hb_feature_t *user_features,
+ unsigned int num_user_features)
{
- switch (c->original_direction) {
+ switch (props->direction) {
case HB_DIRECTION_LTR:
- allocator->add_feature (HB_TAG ('l','t','r','a'), 1, true);
- allocator->add_feature (HB_TAG ('l','t','r','m'), 1, true);
+ planner->map.add_bool_feature (HB_TAG ('l','t','r','a'));
+ planner->map.add_bool_feature (HB_TAG ('l','t','r','m'));
break;
case HB_DIRECTION_RTL:
- allocator->add_feature (HB_TAG ('r','t','l','a'), 1, true);
- allocator->add_feature (HB_TAG ('r','t','l','m'), 1, false);
+ planner->map.add_bool_feature (HB_TAG ('r','t','l','a'));
+ planner->map.add_bool_feature (HB_TAG ('r','t','l','m'), false);
break;
case HB_DIRECTION_TTB:
case HB_DIRECTION_BTT:
+ case HB_DIRECTION_INVALID:
default:
break;
}
- for (unsigned int i = 0; i < ARRAY_LENGTH (default_features); i++)
- allocator->add_feature (default_features[i], 1, true);
+#define ADD_FEATURES(array) \
+ HB_STMT_START { \
+ for (unsigned int i = 0; i < ARRAY_LENGTH (array); i++) \
+ planner->map.add_bool_feature (array[i]); \
+ } HB_STMT_END
- /* complex */
+ hb_ot_shape_complex_collect_features (planner->shaper, &planner->map, props);
- for (unsigned int i = 0; i < c->num_features; i++) {
- const hb_feature_t *feature = &c->features[i];
- allocator->add_feature (feature->tag, feature->value, (feature->start == 0 && feature->end == (unsigned int) -1));
+ ADD_FEATURES (common_features);
+
+ if (HB_DIRECTION_IS_HORIZONTAL (props->direction))
+ ADD_FEATURES (horizontal_features);
+ else
+ ADD_FEATURES (vertical_features);
+
+#undef ADD_FEATURES
+
+ for (unsigned int i = 0; i < num_user_features; i++) {
+ const hb_feature_t *feature = &user_features[i];
+ planner->map.add_feature (feature->tag, feature->value, (feature->start == 0 && feature->end == (unsigned int) -1));
}
}
static void
-hb_ot_shape_setup_lookups (hb_ot_shape_context_t *c,
- hb_mask_allocator_t *allocator)
+hb_ot_shape_setup_masks (hb_ot_shape_context_t *c)
{
- hb_ot_shape_collect_features (c, allocator);
-
- /* Compile features */
- allocator->compile (c);
+ hb_mask_t global_mask = c->plan->map.get_global_mask ();
+ c->buffer->reset_masks (global_mask);
- /* Set masks in buffer */
+ hb_ot_shape_complex_setup_masks (c->plan->shaper, &c->plan->map, c->buffer); /* BUFFER: Clobbers var2 */
- 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++)
+ for (unsigned int i = 0; i < c->num_user_features; i++)
{
- hb_feature_t *feature = &c->features[i];
- 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);
+ const hb_feature_t *feature = &c->user_features[i];
+ if (!(feature->start == 0 && feature->end == (unsigned int)-1)) {
+ unsigned int shift;
+ hb_mask_t mask = c->plan->map.get_mask (feature->tag, &shift);
+ c->buffer->set_masks (feature->value << shift, mask, feature->start, feature->end);
+ }
}
-
- /* complex */
}
static void
-hb_ot_substitute_complex (hb_ot_shape_context_t *c,
- const hb_mask_allocator_t *allocator)
+hb_ot_substitute_complex (hb_ot_shape_context_t *c)
{
if (!hb_ot_layout_has_substitution (c->face))
return;
- allocator->substitute (c);
+ c->plan->map.substitute (c->face, c->buffer);
c->applied_substitute_complex = TRUE;
return;
}
static void
-hb_ot_position_complex (hb_ot_shape_context_t *c,
- const hb_mask_allocator_t *allocator)
+hb_ot_position_complex (hb_ot_shape_context_t *c)
{
if (!hb_ot_layout_has_positioning (c->face))
return;
- allocator->position (c);
+ unsigned int count = c->buffer->len;
+ for (unsigned int i = 0; i < count; i++) {
+ hb_font_add_glyph_origin_for_direction (c->font, c->buffer->info[i].codepoint,
+ HB_DIRECTION_LTR,
+ &c->buffer->pos[i].x_offset,
+ &c->buffer->pos[i].y_offset);
+ }
- hb_ot_layout_position_finish (c->font, c->face, c->buffer);
+ c->plan->map.position (c->font, c->buffer);
+
+ for (unsigned int i = 0; i < count; i++) {
+ hb_font_subtract_glyph_origin_for_direction (c->font, c->buffer->info[i].codepoint,
+ HB_DIRECTION_LTR,
+ &c->buffer->pos[i].x_offset,
+ &c->buffer->pos[i].y_offset);
+ }
+
+ hb_ot_layout_position_finish (c->buffer);
c->applied_position_complex = TRUE;
return;
/* Prepare */
-static inline hb_bool_t
-is_variation_selector (hb_codepoint_t unicode)
+void
+_hb_set_unicode_props (hb_buffer_t *buffer)
{
- return unlikely ((unicode >= 0x180B && unicode <= 0x180D) || /* MONGOLIAN FREE VARIATION SELECTOR ONE..THREE */
- (unicode >= 0xFE00 && unicode <= 0xFE0F) || /* VARIATION SELECTOR-1..16 */
- (unicode >= 0xE0100 && unicode <= 0xE01EF)); /* VARIATION SELECTOR-17..256 */
+ unsigned int count = buffer->len;
+ for (unsigned int i = 1; i < count; i++)
+ hb_glyph_info_set_unicode_props (&buffer->info[i], buffer->unicode);
}
static void
{
unsigned int count = buffer->len;
for (unsigned int i = 1; i < count; i++)
- if (buffer->unicode->v.get_general_category (buffer->info[i].codepoint) == HB_CATEGORY_NON_SPACING_MARK)
+ if (FLAG (buffer->info[i].general_category()) &
+ (FLAG (HB_UNICODE_GENERAL_CATEGORY_SPACING_MARK) |
+ FLAG (HB_UNICODE_GENERAL_CATEGORY_ENCLOSING_MARK) |
+ FLAG (HB_UNICODE_GENERAL_CATEGORY_NON_SPACING_MARK)))
buffer->info[i].cluster = buffer->info[i - 1].cluster;
}
{
hb_direction_t direction = buffer->props.direction;
- /* TODO vertical */
- if (HB_DIRECTION_IS_HORIZONTAL (direction) &&
- direction != _hb_script_get_horizontal_direction (buffer->props.script))
+ /* TODO vertical:
+ * The only BTT vertical script is Ogham, but it's not clear to me whether OpenType
+ * Ogham fonts are supposed to be implemented BTT or not. Need to research that
+ * first. */
+ if ((HB_DIRECTION_IS_HORIZONTAL (direction) && direction != hb_script_get_horizontal_direction (buffer->props.script)) ||
+ (HB_DIRECTION_IS_VERTICAL (direction) && direction != HB_DIRECTION_TTB))
{
hb_buffer_reverse_clusters (buffer);
buffer->props.direction = HB_DIRECTION_REVERSE (buffer->props.direction);
}
}
+static void
+hb_reset_glyph_infos (hb_buffer_t *buffer)
+{
+ unsigned int count = buffer->len;
+ for (unsigned int i = 0; i < count; i++)
+ buffer->info[i].var1.u32 = buffer->info[i].var2.u32 = 0;
+}
+
/* Substitute */
static void
-hb_mirror_chars (hb_buffer_t *buffer)
+hb_mirror_chars (hb_ot_shape_context_t *c)
{
- hb_unicode_get_mirroring_func_t get_mirroring = buffer->unicode->v.get_mirroring;
+ hb_unicode_funcs_t *unicode = c->buffer->unicode;
- if (HB_DIRECTION_IS_FORWARD (buffer->props.direction))
+ if (HB_DIRECTION_IS_FORWARD (c->target_direction))
return;
-// map = allocator.find_feature (HB_TAG ('r','t','l','m'));
+ hb_mask_t rtlm_mask = c->plan->map.get_1_mask (HB_TAG ('r','t','l','m'));
- unsigned int count = buffer->len;
+ unsigned int count = c->buffer->len;
for (unsigned int i = 0; i < count; i++) {
- hb_codepoint_t codepoint = get_mirroring (buffer->info[i].codepoint);
- if (likely (codepoint == buffer->info[i].codepoint))
-;// buffer->info[i].mask |= map->mask;
+ hb_codepoint_t codepoint = hb_unicode_mirroring (unicode, c->buffer->info[i].codepoint);
+ if (likely (codepoint == c->buffer->info[i].codepoint))
+ c->buffer->info[i].mask |= rtlm_mask; /* XXX this should be moved to before setting user-feature masks */
else
- buffer->info[i].codepoint = codepoint;
+ c->buffer->info[i].codepoint = codepoint;
}
}
static void
hb_map_glyphs (hb_font_t *font,
- hb_face_t *face,
hb_buffer_t *buffer)
{
+ hb_codepoint_t glyph;
+
if (unlikely (!buffer->len))
return;
buffer->clear_output ();
+
unsigned int count = buffer->len - 1;
- for (buffer->i = 0; buffer->i < count;) {
- if (unlikely (is_variation_selector (buffer->info[buffer->i + 1].codepoint))) {
- buffer->add_output_glyph (hb_font_get_glyph (font, face, buffer->info[buffer->i].codepoint, buffer->info[buffer->i + 1].codepoint));
- buffer->i++;
+ for (buffer->idx = 0; buffer->idx < count;) {
+ if (unlikely (is_variation_selector (buffer->info[buffer->idx + 1].codepoint))) {
+ hb_font_get_glyph (font, buffer->info[buffer->idx].codepoint, buffer->info[buffer->idx + 1].codepoint, &glyph);
+ buffer->replace_glyph (glyph);
+ buffer->skip_glyph ();
} else {
- buffer->add_output_glyph (hb_font_get_glyph (font, face, buffer->info[buffer->i].codepoint, 0));
+ hb_font_get_glyph (font, buffer->info[buffer->idx].codepoint, 0, &glyph);
+ buffer->replace_glyph (glyph);
}
}
- if (likely (buffer->i < buffer->len))
- buffer->add_output_glyph (hb_font_get_glyph (font, face, buffer->info[buffer->i].codepoint, 0));
- buffer->swap ();
+ if (likely (buffer->idx < buffer->len)) {
+ hb_font_get_glyph (font, buffer->info[buffer->idx].codepoint, 0, &glyph);
+ buffer->replace_glyph (glyph);
+ }
+ buffer->swap_buffers ();
}
static void
hb_substitute_default (hb_ot_shape_context_t *c)
{
- hb_map_glyphs (c->font, c->face, c->buffer);
+ hb_map_glyphs (c->font, c->buffer);
}
static void
static void
hb_position_default (hb_ot_shape_context_t *c)
{
- hb_buffer_clear_positions (c->buffer);
+ hb_ot_layout_position_start (c->buffer);
unsigned int count = c->buffer->len;
for (unsigned int i = 0; i < count; i++) {
- hb_glyph_metrics_t metrics;
- hb_font_get_glyph_metrics (c->font, c->face, c->buffer->info[i].codepoint, &metrics);
- c->buffer->pos[i].x_advance = metrics.x_advance;
- c->buffer->pos[i].y_advance = metrics.y_advance;
+ hb_font_get_glyph_advance_for_direction (c->font, c->buffer->info[i].codepoint,
+ c->buffer->props.direction,
+ &c->buffer->pos[i].x_advance,
+ &c->buffer->pos[i].y_advance);
+ hb_font_subtract_glyph_origin_for_direction (c->font, c->buffer->info[i].codepoint,
+ c->buffer->props.direction,
+ &c->buffer->pos[i].x_offset,
+ &c->buffer->pos[i].y_offset);
}
}
/* TODO Check for kern=0 */
unsigned int count = c->buffer->len;
for (unsigned int i = 1; i < count; i++) {
- hb_position_t kern, kern1, kern2;
- kern = hb_font_get_kerning (c->font, c->face, c->buffer->info[i - 1].codepoint, c->buffer->info[i].codepoint);
- kern1 = kern >> 1;
- kern2 = kern - kern1;
+ hb_position_t x_kern, y_kern, kern1, kern2;
+ hb_font_get_glyph_kerning_for_direction (c->font,
+ c->buffer->info[i - 1].codepoint, c->buffer->info[i].codepoint,
+ c->buffer->props.direction,
+ &x_kern, &y_kern);
+
+ kern1 = x_kern >> 1;
+ kern2 = x_kern - kern1;
c->buffer->pos[i - 1].x_advance += kern1;
c->buffer->pos[i].x_advance += kern2;
c->buffer->pos[i].x_offset += kern2;
+
+ kern1 = y_kern >> 1;
+ kern2 = y_kern - kern1;
+ c->buffer->pos[i - 1].y_advance += kern1;
+ c->buffer->pos[i].y_advance += kern2;
+ c->buffer->pos[i].y_offset += kern2;
}
}
/* Do it! */
static void
-hb_ot_shape_internal (hb_ot_shape_context_t *c)
+hb_ot_shape_execute_internal (hb_ot_shape_context_t *c)
{
- hb_mask_allocator_t allocator;
+ /* Save the original direction, we use it later. */
+ c->target_direction = c->buffer->props.direction;
- hb_ot_shape_setup_lookups (c, &allocator);
+ hb_reset_glyph_infos (c->buffer); /* BUFFER: Clear buffer var1 and var2 */
+ _hb_set_unicode_props (c->buffer); /* BUFFER: Set general_category and combining_class in var1 */
hb_form_clusters (c->buffer);
- /* SUBSTITUTE */
- {
- c->buffer->clear_masks ();
+ hb_ensure_native_direction (c->buffer);
- /* Mirroring needs to see the original direction */
- hb_mirror_chars (c->buffer);
+ _hb_ot_shape_normalize (c);
- hb_ensure_native_direction (c->buffer);
+ hb_ot_shape_setup_masks (c); /* BUFFER: Clobbers var2 */
+
+ /* SUBSTITUTE */
+ {
+ hb_mirror_chars (c);
hb_substitute_default (c);
- hb_ot_substitute_complex (c, &allocator);
+ hb_ot_substitute_complex (c);
if (!c->applied_substitute_complex)
hb_substitute_complex_fallback (c);
/* POSITION */
{
- c->buffer->clear_masks ();
-
hb_position_default (c);
- hb_ot_position_complex (c, &allocator);
+ hb_ot_position_complex (c);
hb_bool_t position_fallback = !c->applied_position_complex;
if (position_fallback)
hb_position_complex_fallback_visual (c);
}
- c->buffer->props.direction = c->original_direction;
+ c->buffer->props.direction = c->target_direction;
}
-void
-hb_ot_shape (hb_font_t *font,
- hb_face_t *face,
- hb_buffer_t *buffer,
- hb_feature_t *features,
- unsigned int num_features)
+static void
+hb_ot_shape_plan_internal (hb_ot_shape_plan_t *plan,
+ hb_face_t *face,
+ const hb_segment_properties_t *props,
+ const hb_feature_t *user_features,
+ unsigned int num_user_features)
{
- hb_ot_shape_context_t c = {font, face, buffer, features, num_features};
+ hb_ot_shape_planner_t planner;
+
+ planner.shaper = hb_ot_shape_complex_categorize (props);
- /* Setup transient context members */
- c.original_direction = buffer->props.direction;
+ hb_ot_shape_collect_features (&planner, props, user_features, num_user_features);
+
+ planner.compile (face, props, *plan);
+}
+
+static void
+hb_ot_shape_execute (hb_ot_shape_plan_t *plan,
+ hb_font_t *font,
+ hb_buffer_t *buffer,
+ const hb_feature_t *user_features,
+ unsigned int num_user_features)
+{
+ hb_ot_shape_context_t c = {plan, font, font->face, buffer, user_features, num_user_features};
+ hb_ot_shape_execute_internal (&c);
+}
+
+void
+hb_ot_shape (hb_font_t *font,
+ hb_buffer_t *buffer,
+ const hb_feature_t *features,
+ unsigned int num_features)
+{
+ hb_ot_shape_plan_t plan;
- hb_ot_shape_internal (&c);
+ hb_ot_shape_plan_internal (&plan, font->face, &buffer->props, features, num_features);
+ hb_ot_shape_execute (&plan, font, buffer, features, num_features);
}
projects / framework / uifw / harfbuzz.git / blobdiff