* Copyright © 1998-2004 David Turner and Werner Lemberg
* Copyright © 2006 Behdad Esfahbod
* Copyright © 2007,2008,2009 Red Hat, Inc.
- * Copyright © 2012 Google, Inc.
+ * Copyright © 2012,2013 Google, Inc.
*
* This is part of HarfBuzz, a text shaping library.
*
#include "hb-ot-layout-gdef-table.hh"
#include "hb-ot-layout-gsub-table.hh"
#include "hb-ot-layout-gpos-table.hh"
-#include "hb-ot-maxp-table.hh"
+#include "hb-ot-layout-jstf-table.hh"
+#include "hb-ot-map-private.hh"
#include <stdlib.h>
#include <string.h>
if (unlikely (!layout))
return NULL;
- layout->gdef_blob = Sanitizer<GDEF>::sanitize (face->reference_table (HB_OT_TAG_GDEF));
- layout->gdef = Sanitizer<GDEF>::lock_instance (layout->gdef_blob);
+ layout->gdef_blob = OT::Sanitizer<OT::GDEF>::sanitize (face->reference_table (HB_OT_TAG_GDEF));
+ layout->gdef = OT::Sanitizer<OT::GDEF>::lock_instance (layout->gdef_blob);
- layout->gsub_blob = Sanitizer<GSUB>::sanitize (face->reference_table (HB_OT_TAG_GSUB));
- layout->gsub = Sanitizer<GSUB>::lock_instance (layout->gsub_blob);
+ layout->gsub_blob = OT::Sanitizer<OT::GSUB>::sanitize (face->reference_table (HB_OT_TAG_GSUB));
+ layout->gsub = OT::Sanitizer<OT::GSUB>::lock_instance (layout->gsub_blob);
- layout->gpos_blob = Sanitizer<GPOS>::sanitize (face->reference_table (HB_OT_TAG_GPOS));
- layout->gpos = Sanitizer<GPOS>::lock_instance (layout->gpos_blob);
+ layout->gpos_blob = OT::Sanitizer<OT::GPOS>::sanitize (face->reference_table (HB_OT_TAG_GPOS));
+ layout->gpos = OT::Sanitizer<OT::GPOS>::lock_instance (layout->gpos_blob);
layout->gsub_lookup_count = layout->gsub->get_lookup_count ();
layout->gpos_lookup_count = layout->gpos->get_lookup_count ();
- layout->gsub_digests = (hb_set_digest_t *) calloc (layout->gsub->get_lookup_count (), sizeof (hb_set_digest_t));
- layout->gpos_digests = (hb_set_digest_t *) calloc (layout->gpos->get_lookup_count (), sizeof (hb_set_digest_t));
+ layout->gsub_accels = (hb_ot_layout_lookup_accelerator_t *) calloc (layout->gsub->get_lookup_count (), sizeof (hb_ot_layout_lookup_accelerator_t));
+ layout->gpos_accels = (hb_ot_layout_lookup_accelerator_t *) calloc (layout->gpos->get_lookup_count (), sizeof (hb_ot_layout_lookup_accelerator_t));
- if (unlikely ((layout->gsub_lookup_count && !layout->gsub_digests) ||
- (layout->gpos_lookup_count && !layout->gpos_digests)))
+ if (unlikely ((layout->gsub_lookup_count && !layout->gsub_accels) ||
+ (layout->gpos_lookup_count && !layout->gpos_accels)))
{
_hb_ot_layout_destroy (layout);
return NULL;
}
for (unsigned int i = 0; i < layout->gsub_lookup_count; i++)
- layout->gsub->add_coverage (&layout->gsub_digests[i], i);
+ layout->gsub_accels[i].init (layout->gsub->get_lookup (i));
for (unsigned int i = 0; i < layout->gpos_lookup_count; i++)
- layout->gpos->add_coverage (&layout->gpos_digests[i], i);
+ layout->gpos_accels[i].init (layout->gpos->get_lookup (i));
return layout;
}
void
_hb_ot_layout_destroy (hb_ot_layout_t *layout)
{
+ for (unsigned int i = 0; i < layout->gsub_lookup_count; i++)
+ layout->gsub_accels[i].fini ();
+ for (unsigned int i = 0; i < layout->gpos_lookup_count; i++)
+ layout->gpos_accels[i].fini ();
+
+ free (layout->gsub_accels);
+ free (layout->gpos_accels);
+
hb_blob_destroy (layout->gdef_blob);
hb_blob_destroy (layout->gsub_blob);
hb_blob_destroy (layout->gpos_blob);
- free (layout->gsub_digests);
- free (layout->gpos_digests);
-
free (layout);
}
-static inline const GDEF&
+static inline const OT::GDEF&
_get_gdef (hb_face_t *face)
{
- if (unlikely (!hb_ot_shaper_face_data_ensure (face))) return Null(GDEF);
+ if (unlikely (!hb_ot_shaper_face_data_ensure (face))) return OT::Null(OT::GDEF);
return *hb_ot_layout_from_face (face)->gdef;
}
-static inline const GSUB&
+static inline const OT::GSUB&
_get_gsub (hb_face_t *face)
{
- if (unlikely (!hb_ot_shaper_face_data_ensure (face))) return Null(GSUB);
+ if (unlikely (!hb_ot_shaper_face_data_ensure (face))) return OT::Null(OT::GSUB);
return *hb_ot_layout_from_face (face)->gsub;
}
-static inline const GPOS&
+static inline const OT::GPOS&
_get_gpos (hb_face_t *face)
{
- if (unlikely (!hb_ot_shaper_face_data_ensure (face))) return Null(GPOS);
+ if (unlikely (!hb_ot_shaper_face_data_ensure (face))) return OT::Null(OT::GPOS);
return *hb_ot_layout_from_face (face)->gpos;
}
return _get_gdef (face).has_glyph_classes ();
}
+hb_ot_layout_glyph_class_t
+hb_ot_layout_get_glyph_class (hb_face_t *face,
+ hb_codepoint_t glyph)
+{
+ return (hb_ot_layout_glyph_class_t) _get_gdef (face).get_glyph_class (glyph);
+}
+
+void
+hb_ot_layout_get_glyphs_in_class (hb_face_t *face,
+ hb_ot_layout_glyph_class_t klass,
+ hb_set_t *glyphs /* OUT */)
+{
+ return _get_gdef (face).get_glyphs_in_class (klass, glyphs);
+}
unsigned int
hb_ot_layout_get_attach_points (hb_face_t *face,
* GSUB/GPOS
*/
-static const GSUBGPOS&
+static const OT::GSUBGPOS&
get_gsubgpos_table (hb_face_t *face,
hb_tag_t table_tag)
{
switch (table_tag) {
case HB_OT_TAG_GSUB: return _get_gsub (face);
case HB_OT_TAG_GPOS: return _get_gpos (face);
- default: return Null(GSUBGPOS);
+ default: return OT::Null(OT::GSUBGPOS);
}
}
unsigned int *script_count /* IN/OUT */,
hb_tag_t *script_tags /* OUT */)
{
- const GSUBGPOS &g = get_gsubgpos_table (face, table_tag);
+ const OT::GSUBGPOS &g = get_gsubgpos_table (face, table_tag);
return g.get_script_tags (start_offset, script_count, script_tags);
}
+#define HB_OT_TAG_LATIN_SCRIPT HB_TAG ('l', 'a', 't', 'n')
+
hb_bool_t
hb_ot_layout_table_find_script (hb_face_t *face,
hb_tag_t table_tag,
hb_tag_t script_tag,
unsigned int *script_index)
{
- ASSERT_STATIC (Index::NOT_FOUND_INDEX == HB_OT_LAYOUT_NO_SCRIPT_INDEX);
- const GSUBGPOS &g = get_gsubgpos_table (face, table_tag);
+ ASSERT_STATIC (OT::Index::NOT_FOUND_INDEX == HB_OT_LAYOUT_NO_SCRIPT_INDEX);
+ const OT::GSUBGPOS &g = get_gsubgpos_table (face, table_tag);
if (g.find_script_index (script_tag, script_index))
return true;
if (g.find_script_index (HB_OT_TAG_DEFAULT_LANGUAGE, script_index))
return false;
+ /* try with 'latn'; some old fonts put their features there even though
+ they're really trying to support Thai, for example :( */
+ if (g.find_script_index (HB_OT_TAG_LATIN_SCRIPT, script_index))
+ return false;
+
if (script_index) *script_index = HB_OT_LAYOUT_NO_SCRIPT_INDEX;
return false;
}
unsigned int *script_index,
hb_tag_t *chosen_script)
{
- ASSERT_STATIC (Index::NOT_FOUND_INDEX == HB_OT_LAYOUT_NO_SCRIPT_INDEX);
- const GSUBGPOS &g = get_gsubgpos_table (face, table_tag);
+ ASSERT_STATIC (OT::Index::NOT_FOUND_INDEX == HB_OT_LAYOUT_NO_SCRIPT_INDEX);
+ const OT::GSUBGPOS &g = get_gsubgpos_table (face, table_tag);
while (*script_tags)
{
/* try with 'latn'; some old fonts put their features there even though
they're really trying to support Thai, for example :( */
-#define HB_OT_TAG_LATIN_SCRIPT HB_TAG ('l', 'a', 't', 'n')
if (g.find_script_index (HB_OT_TAG_LATIN_SCRIPT, script_index)) {
if (chosen_script)
*chosen_script = HB_OT_TAG_LATIN_SCRIPT;
unsigned int *feature_count /* IN/OUT */,
hb_tag_t *feature_tags /* OUT */)
{
- const GSUBGPOS &g = get_gsubgpos_table (face, table_tag);
+ const OT::GSUBGPOS &g = get_gsubgpos_table (face, table_tag);
return g.get_feature_tags (start_offset, feature_count, feature_tags);
}
unsigned int *language_count /* IN/OUT */,
hb_tag_t *language_tags /* OUT */)
{
- const Script &s = get_gsubgpos_table (face, table_tag).get_script (script_index);
+ const OT::Script &s = get_gsubgpos_table (face, table_tag).get_script (script_index);
return s.get_lang_sys_tags (start_offset, language_count, language_tags);
}
hb_tag_t language_tag,
unsigned int *language_index)
{
- ASSERT_STATIC (Index::NOT_FOUND_INDEX == HB_OT_LAYOUT_DEFAULT_LANGUAGE_INDEX);
- const Script &s = get_gsubgpos_table (face, table_tag).get_script (script_index);
+ ASSERT_STATIC (OT::Index::NOT_FOUND_INDEX == HB_OT_LAYOUT_DEFAULT_LANGUAGE_INDEX);
+ const OT::Script &s = get_gsubgpos_table (face, table_tag).get_script (script_index);
if (s.find_lang_sys_index (language_tag, language_index))
return true;
unsigned int language_index,
unsigned int *feature_index)
{
- const LangSys &l = get_gsubgpos_table (face, table_tag).get_script (script_index).get_lang_sys (language_index);
+ return hb_ot_layout_language_get_required_feature (face,
+ table_tag,
+ script_index,
+ language_index,
+ feature_index,
+ NULL);
+}
- if (feature_index) *feature_index = l.get_required_feature_index ();
+hb_bool_t
+hb_ot_layout_language_get_required_feature (hb_face_t *face,
+ hb_tag_t table_tag,
+ unsigned int script_index,
+ unsigned int language_index,
+ unsigned int *feature_index,
+ hb_tag_t *feature_tag)
+{
+ const OT::GSUBGPOS &g = get_gsubgpos_table (face, table_tag);
+ const OT::LangSys &l = g.get_script (script_index).get_lang_sys (language_index);
+
+ unsigned int index = l.get_required_feature_index ();
+ if (feature_index) *feature_index = index;
+ if (feature_tag) *feature_tag = g.get_feature_tag (index);
return l.has_required_feature ();
}
unsigned int *feature_count /* IN/OUT */,
unsigned int *feature_indexes /* OUT */)
{
- const GSUBGPOS &g = get_gsubgpos_table (face, table_tag);
- const LangSys &l = g.get_script (script_index).get_lang_sys (language_index);
+ const OT::GSUBGPOS &g = get_gsubgpos_table (face, table_tag);
+ const OT::LangSys &l = g.get_script (script_index).get_lang_sys (language_index);
return l.get_feature_indexes (start_offset, feature_count, feature_indexes);
}
unsigned int *feature_count /* IN/OUT */,
hb_tag_t *feature_tags /* OUT */)
{
- const GSUBGPOS &g = get_gsubgpos_table (face, table_tag);
- const LangSys &l = g.get_script (script_index).get_lang_sys (language_index);
+ const OT::GSUBGPOS &g = get_gsubgpos_table (face, table_tag);
+ const OT::LangSys &l = g.get_script (script_index).get_lang_sys (language_index);
ASSERT_STATIC (sizeof (unsigned int) == sizeof (hb_tag_t));
unsigned int ret = l.get_feature_indexes (start_offset, feature_count, (unsigned int *) feature_tags);
hb_tag_t feature_tag,
unsigned int *feature_index)
{
- ASSERT_STATIC (Index::NOT_FOUND_INDEX == HB_OT_LAYOUT_NO_FEATURE_INDEX);
- const GSUBGPOS &g = get_gsubgpos_table (face, table_tag);
- const LangSys &l = g.get_script (script_index).get_lang_sys (language_index);
+ ASSERT_STATIC (OT::Index::NOT_FOUND_INDEX == HB_OT_LAYOUT_NO_FEATURE_INDEX);
+ const OT::GSUBGPOS &g = get_gsubgpos_table (face, table_tag);
+ const OT::LangSys &l = g.get_script (script_index).get_lang_sys (language_index);
unsigned int num_features = l.get_feature_count ();
for (unsigned int i = 0; i < num_features; i++) {
}
unsigned int
-hb_ot_layout_feature_get_lookup_indexes (hb_face_t *face,
- hb_tag_t table_tag,
- unsigned int feature_index,
- unsigned int start_offset,
- unsigned int *lookup_count /* IN/OUT */,
- unsigned int *lookup_indexes /* OUT */)
+hb_ot_layout_feature_get_lookups (hb_face_t *face,
+ hb_tag_t table_tag,
+ unsigned int feature_index,
+ unsigned int start_offset,
+ unsigned int *lookup_count /* IN/OUT */,
+ unsigned int *lookup_indexes /* OUT */)
{
- const GSUBGPOS &g = get_gsubgpos_table (face, table_tag);
- const Feature &f = g.get_feature (feature_index);
+ const OT::GSUBGPOS &g = get_gsubgpos_table (face, table_tag);
+ const OT::Feature &f = g.get_feature (feature_index);
return f.get_lookup_indexes (start_offset, lookup_count, lookup_indexes);
}
+unsigned int
+hb_ot_layout_table_get_lookup_count (hb_face_t *face,
+ hb_tag_t table_tag)
+{
+ switch (table_tag)
+ {
+ case HB_OT_TAG_GSUB:
+ {
+ return hb_ot_layout_from_face (face)->gsub_lookup_count;
+ }
+ case HB_OT_TAG_GPOS:
+ {
+ return hb_ot_layout_from_face (face)->gpos_lookup_count;
+ }
+ }
+ return 0;
+}
+
+static void
+_hb_ot_layout_collect_lookups_lookups (hb_face_t *face,
+ hb_tag_t table_tag,
+ unsigned int feature_index,
+ hb_set_t *lookup_indexes /* OUT */)
+{
+ unsigned int lookup_indices[32];
+ unsigned int offset, len;
+
+ offset = 0;
+ do {
+ len = ARRAY_LENGTH (lookup_indices);
+ hb_ot_layout_feature_get_lookups (face,
+ table_tag,
+ feature_index,
+ offset, &len,
+ lookup_indices);
+
+ for (unsigned int i = 0; i < len; i++)
+ lookup_indexes->add (lookup_indices[i]);
+
+ offset += len;
+ } while (len == ARRAY_LENGTH (lookup_indices));
+}
+
+static void
+_hb_ot_layout_collect_lookups_features (hb_face_t *face,
+ hb_tag_t table_tag,
+ unsigned int script_index,
+ unsigned int language_index,
+ const hb_tag_t *features,
+ hb_set_t *lookup_indexes /* OUT */)
+{
+ if (!features)
+ {
+ unsigned int required_feature_index;
+ if (hb_ot_layout_language_get_required_feature (face,
+ table_tag,
+ script_index,
+ language_index,
+ &required_feature_index,
+ NULL))
+ _hb_ot_layout_collect_lookups_lookups (face,
+ table_tag,
+ required_feature_index,
+ lookup_indexes);
+
+ /* All features */
+ unsigned int feature_indices[32];
+ unsigned int offset, len;
+
+ offset = 0;
+ do {
+ len = ARRAY_LENGTH (feature_indices);
+ hb_ot_layout_language_get_feature_indexes (face,
+ table_tag,
+ script_index,
+ language_index,
+ offset, &len,
+ feature_indices);
+
+ for (unsigned int i = 0; i < len; i++)
+ _hb_ot_layout_collect_lookups_lookups (face,
+ table_tag,
+ feature_indices[i],
+ lookup_indexes);
+
+ offset += len;
+ } while (len == ARRAY_LENGTH (feature_indices));
+ }
+ else
+ {
+ for (; *features; features++)
+ {
+ unsigned int feature_index;
+ if (hb_ot_layout_language_find_feature (face,
+ table_tag,
+ script_index,
+ language_index,
+ *features,
+ &feature_index))
+ _hb_ot_layout_collect_lookups_lookups (face,
+ table_tag,
+ feature_index,
+ lookup_indexes);
+ }
+ }
+}
+
+static void
+_hb_ot_layout_collect_lookups_languages (hb_face_t *face,
+ hb_tag_t table_tag,
+ unsigned int script_index,
+ const hb_tag_t *languages,
+ const hb_tag_t *features,
+ hb_set_t *lookup_indexes /* OUT */)
+{
+ _hb_ot_layout_collect_lookups_features (face,
+ table_tag,
+ script_index,
+ HB_OT_LAYOUT_DEFAULT_LANGUAGE_INDEX,
+ features,
+ lookup_indexes);
+
+ if (!languages)
+ {
+ /* All languages */
+ unsigned int count = hb_ot_layout_script_get_language_tags (face,
+ table_tag,
+ script_index,
+ 0, NULL, NULL);
+ for (unsigned int language_index = 0; language_index < count; language_index++)
+ _hb_ot_layout_collect_lookups_features (face,
+ table_tag,
+ script_index,
+ language_index,
+ features,
+ lookup_indexes);
+ }
+ else
+ {
+ for (; *languages; languages++)
+ {
+ unsigned int language_index;
+ if (hb_ot_layout_script_find_language (face,
+ table_tag,
+ script_index,
+ *languages,
+ &language_index))
+ _hb_ot_layout_collect_lookups_features (face,
+ table_tag,
+ script_index,
+ language_index,
+ features,
+ lookup_indexes);
+ }
+ }
+}
+
+void
+hb_ot_layout_collect_lookups (hb_face_t *face,
+ hb_tag_t table_tag,
+ const hb_tag_t *scripts,
+ const hb_tag_t *languages,
+ const hb_tag_t *features,
+ hb_set_t *lookup_indexes /* OUT */)
+{
+ if (!scripts)
+ {
+ /* All scripts */
+ unsigned int count = hb_ot_layout_table_get_script_tags (face,
+ table_tag,
+ 0, NULL, NULL);
+ for (unsigned int script_index = 0; script_index < count; script_index++)
+ _hb_ot_layout_collect_lookups_languages (face,
+ table_tag,
+ script_index,
+ languages,
+ features,
+ lookup_indexes);
+ }
+ else
+ {
+ for (; *scripts; scripts++)
+ {
+ unsigned int script_index;
+ if (hb_ot_layout_table_find_script (face,
+ table_tag,
+ *scripts,
+ &script_index))
+ _hb_ot_layout_collect_lookups_languages (face,
+ table_tag,
+ script_index,
+ languages,
+ features,
+ lookup_indexes);
+ }
+ }
+}
+
+void
+hb_ot_layout_lookup_collect_glyphs (hb_face_t *face,
+ hb_tag_t table_tag,
+ unsigned int lookup_index,
+ hb_set_t *glyphs_before, /* OUT. May be NULL */
+ hb_set_t *glyphs_input, /* OUT. May be NULL */
+ hb_set_t *glyphs_after, /* OUT. May be NULL */
+ hb_set_t *glyphs_output /* OUT. May be NULL */)
+{
+ if (unlikely (!hb_ot_shaper_face_data_ensure (face))) return;
+
+ OT::hb_collect_glyphs_context_t c (face,
+ glyphs_before,
+ glyphs_input,
+ glyphs_after,
+ glyphs_output);
+
+ switch (table_tag)
+ {
+ case HB_OT_TAG_GSUB:
+ {
+ const OT::SubstLookup& l = hb_ot_layout_from_face (face)->gsub->get_lookup (lookup_index);
+ l.collect_glyphs (&c);
+ return;
+ }
+ case HB_OT_TAG_GPOS:
+ {
+ const OT::PosLookup& l = hb_ot_layout_from_face (face)->gpos->get_lookup (lookup_index);
+ l.collect_glyphs (&c);
+ return;
+ }
+ }
+}
+
/*
- * GSUB
+ * OT::GSUB
*/
hb_bool_t
hb_ot_layout_has_substitution (hb_face_t *face)
{
- return &_get_gsub (face) != &Null(GSUB);
+ return &_get_gsub (face) != &OT::Null(OT::GSUB);
}
hb_bool_t
-hb_ot_layout_would_substitute_lookup (hb_face_t *face,
+hb_ot_layout_lookup_would_substitute (hb_face_t *face,
+ unsigned int lookup_index,
const hb_codepoint_t *glyphs,
unsigned int glyphs_length,
- unsigned int lookup_index)
+ hb_bool_t zero_context)
{
if (unlikely (!hb_ot_shaper_face_data_ensure (face))) return false;
- return hb_ot_layout_would_substitute_lookup_fast (face, glyphs, glyphs_length, lookup_index);
+ return hb_ot_layout_lookup_would_substitute_fast (face, lookup_index, glyphs, glyphs_length, zero_context);
}
hb_bool_t
-hb_ot_layout_would_substitute_lookup_fast (hb_face_t *face,
+hb_ot_layout_lookup_would_substitute_fast (hb_face_t *face,
+ unsigned int lookup_index,
const hb_codepoint_t *glyphs,
unsigned int glyphs_length,
- unsigned int lookup_index)
+ hb_bool_t zero_context)
{
if (unlikely (lookup_index >= hb_ot_layout_from_face (face)->gsub_lookup_count)) return false;
- hb_would_apply_context_t c (face, glyphs, glyphs_length, &hb_ot_layout_from_face (face)->gsub_digests[lookup_index]);
- return hb_ot_layout_from_face (face)->gsub->would_substitute_lookup (&c, lookup_index);
+ OT::hb_would_apply_context_t c (face, glyphs, glyphs_length, zero_context);
+
+ const OT::SubstLookup& l = hb_ot_layout_from_face (face)->gsub->get_lookup (lookup_index);
+
+ return l.would_apply (&c, &hb_ot_layout_from_face (face)->gsub_accels[lookup_index]);
}
void
hb_ot_layout_substitute_start (hb_font_t *font, hb_buffer_t *buffer)
{
- GSUB::substitute_start (font, buffer);
-}
-
-hb_bool_t
-hb_ot_layout_substitute_lookup (hb_font_t *font,
- hb_buffer_t *buffer,
- unsigned int lookup_index,
- hb_mask_t mask)
-{
- if (unlikely (lookup_index >= hb_ot_layout_from_face (font->face)->gsub_lookup_count)) return false;
- hb_apply_context_t c (font, buffer, mask, &hb_ot_layout_from_face (font->face)->gsub_digests[lookup_index]);
- return hb_ot_layout_from_face (font->face)->gsub->substitute_lookup (&c, lookup_index);
+ OT::GSUB::substitute_start (font, buffer);
}
void
hb_ot_layout_substitute_finish (hb_font_t *font, hb_buffer_t *buffer)
{
- GSUB::substitute_finish (font, buffer);
+ OT::GSUB::substitute_finish (font, buffer);
}
void
-hb_ot_layout_substitute_closure_lookup (hb_face_t *face,
- hb_set_t *glyphs,
- unsigned int lookup_index)
+hb_ot_layout_lookup_substitute_closure (hb_face_t *face,
+ unsigned int lookup_index,
+ hb_set_t *glyphs)
{
- hb_closure_context_t c (face, glyphs);
- _get_gsub (face).closure_lookup (&c, lookup_index);
+ OT::hb_closure_context_t c (face, glyphs);
+
+ const OT::SubstLookup& l = _get_gsub (face).get_lookup (lookup_index);
+
+ l.closure (&c);
}
/*
- * GPOS
+ * OT::GPOS
*/
hb_bool_t
hb_ot_layout_has_positioning (hb_face_t *face)
{
- return &_get_gpos (face) != &Null(GPOS);
+ return &_get_gpos (face) != &OT::Null(OT::GPOS);
}
void
hb_ot_layout_position_start (hb_font_t *font, hb_buffer_t *buffer)
{
- GPOS::position_start (font, buffer);
+ OT::GPOS::position_start (font, buffer);
+}
+
+void
+hb_ot_layout_position_finish (hb_font_t *font, hb_buffer_t *buffer)
+{
+ OT::GPOS::position_finish (font, buffer);
}
hb_bool_t
-hb_ot_layout_position_lookup (hb_font_t *font,
- hb_buffer_t *buffer,
- unsigned int lookup_index,
- hb_mask_t mask)
+hb_ot_layout_get_size_params (hb_face_t *face,
+ unsigned int *design_size, /* OUT. May be NULL */
+ unsigned int *subfamily_id, /* OUT. May be NULL */
+ unsigned int *subfamily_name_id, /* OUT. May be NULL */
+ unsigned int *range_start, /* OUT. May be NULL */
+ unsigned int *range_end /* OUT. May be NULL */)
{
- if (unlikely (lookup_index >= hb_ot_layout_from_face (font->face)->gpos_lookup_count)) return false;
- hb_apply_context_t c (font, buffer, mask, &hb_ot_layout_from_face (font->face)->gpos_digests[lookup_index]);
- return hb_ot_layout_from_face (font->face)->gpos->position_lookup (&c, lookup_index);
+ const OT::GPOS &gpos = _get_gpos (face);
+ const hb_tag_t tag = HB_TAG ('s','i','z','e');
+
+ unsigned int num_features = gpos.get_feature_count ();
+ for (unsigned int i = 0; i < num_features; i++)
+ {
+ if (tag == gpos.get_feature_tag (i))
+ {
+ const OT::Feature &f = gpos.get_feature (i);
+ const OT::FeatureParamsSize ¶ms = f.get_feature_params ().get_size_params (tag);
+
+ if (params.designSize)
+ {
+#define PARAM(a, A) if (a) *a = params.A
+ PARAM (design_size, designSize);
+ PARAM (subfamily_id, subfamilyID);
+ PARAM (subfamily_name_id, subfamilyNameID);
+ PARAM (range_start, rangeStart);
+ PARAM (range_end, rangeEnd);
+#undef PARAM
+
+ return true;
+ }
+ }
+ }
+
+#define PARAM(a, A) if (a) *a = 0
+ PARAM (design_size, designSize);
+ PARAM (subfamily_id, subfamilyID);
+ PARAM (subfamily_name_id, subfamilyNameID);
+ PARAM (range_start, rangeStart);
+ PARAM (range_end, rangeEnd);
+#undef PARAM
+
+ return false;
}
-void
-hb_ot_layout_position_finish (hb_font_t *font, hb_buffer_t *buffer, hb_bool_t zero_width_attached_marks)
+
+/*
+ * Parts of different types are implemented here such that they have direct
+ * access to GSUB/GPOS lookups.
+ */
+
+
+struct GSUBProxy
+{
+ static const unsigned int table_index = 0;
+ static const bool inplace = false;
+ typedef OT::SubstLookup Lookup;
+
+ GSUBProxy (hb_face_t *face) :
+ table (*hb_ot_layout_from_face (face)->gsub),
+ accels (hb_ot_layout_from_face (face)->gsub_accels) {}
+
+ const OT::GSUB &table;
+ const hb_ot_layout_lookup_accelerator_t *accels;
+};
+
+struct GPOSProxy
+{
+ static const unsigned int table_index = 1;
+ static const bool inplace = true;
+ typedef OT::PosLookup Lookup;
+
+ GPOSProxy (hb_face_t *face) :
+ table (*hb_ot_layout_from_face (face)->gpos),
+ accels (hb_ot_layout_from_face (face)->gpos_accels) {}
+
+ const OT::GPOS &table;
+ const hb_ot_layout_lookup_accelerator_t *accels;
+};
+
+
+template <typename Obj>
+static inline bool
+apply_forward (OT::hb_apply_context_t *c,
+ const Obj &obj,
+ const hb_ot_layout_lookup_accelerator_t &accel)
+{
+ bool ret = false;
+ hb_buffer_t *buffer = c->buffer;
+ while (buffer->idx < buffer->len)
+ {
+ if (accel.may_have (buffer->cur().codepoint) &&
+ (buffer->cur().mask & c->lookup_mask) &&
+ c->check_glyph_property (&buffer->cur(), c->lookup_props) &&
+ obj.apply (c))
+ ret = true;
+ else
+ buffer->next_glyph ();
+ }
+ return ret;
+}
+
+template <typename Obj>
+static inline bool
+apply_backward (OT::hb_apply_context_t *c,
+ const Obj &obj,
+ const hb_ot_layout_lookup_accelerator_t &accel)
+{
+ bool ret = false;
+ hb_buffer_t *buffer = c->buffer;
+ do
+ {
+ if (accel.may_have (buffer->cur().codepoint) &&
+ (buffer->cur().mask & c->lookup_mask) &&
+ c->check_glyph_property (&buffer->cur(), c->lookup_props) &&
+ obj.apply (c))
+ ret = true;
+ /* The reverse lookup doesn't "advance" cursor (for good reason). */
+ buffer->idx--;
+
+ }
+ while ((int) buffer->idx >= 0);
+ return ret;
+}
+
+struct hb_apply_forward_context_t
+{
+ inline const char *get_name (void) { return "APPLY_FORWARD"; }
+ static const unsigned int max_debug_depth = HB_DEBUG_APPLY;
+ typedef bool return_t;
+ template <typename T, typename F>
+ inline bool may_dispatch (const T *obj, const F *format) { return true; }
+ template <typename T>
+ inline return_t dispatch (const T &obj) { return apply_forward (c, obj, accel); }
+ static return_t default_return_value (void) { return false; }
+ bool stop_sublookup_iteration (return_t r HB_UNUSED) const { return true; }
+
+ hb_apply_forward_context_t (OT::hb_apply_context_t *c_,
+ const hb_ot_layout_lookup_accelerator_t &accel_) :
+ c (c_),
+ accel (accel_),
+ debug_depth (0) {}
+
+ OT::hb_apply_context_t *c;
+ const hb_ot_layout_lookup_accelerator_t &accel;
+ unsigned int debug_depth;
+};
+
+template <typename Proxy>
+static inline void
+apply_string (OT::hb_apply_context_t *c,
+ const typename Proxy::Lookup &lookup,
+ const hb_ot_layout_lookup_accelerator_t &accel)
+{
+ hb_buffer_t *buffer = c->buffer;
+
+ if (unlikely (!buffer->len || !c->lookup_mask))
+ return;
+
+ c->set_lookup (lookup);
+
+ if (likely (!lookup.is_reverse ()))
+ {
+ /* in/out forward substitution/positioning */
+ if (Proxy::table_index == 0)
+ buffer->clear_output ();
+ buffer->idx = 0;
+
+ bool ret;
+ if (lookup.get_subtable_count () == 1)
+ {
+ hb_apply_forward_context_t c_forward (c, accel);
+ ret = lookup.dispatch (&c_forward);
+ }
+ else
+ ret = apply_forward (c, lookup, accel);
+ if (ret)
+ {
+ if (!Proxy::inplace)
+ buffer->swap_buffers ();
+ else
+ assert (!buffer->has_separate_output ());
+ }
+ }
+ else
+ {
+ /* in-place backward substitution/positioning */
+ if (Proxy::table_index == 0)
+ buffer->remove_output ();
+ buffer->idx = buffer->len - 1;
+
+ apply_backward (c, lookup, accel);
+ }
+}
+
+template <typename Proxy>
+inline void hb_ot_map_t::apply (const Proxy &proxy,
+ const hb_ot_shape_plan_t *plan,
+ hb_font_t *font,
+ hb_buffer_t *buffer) const
+{
+ const unsigned int table_index = proxy.table_index;
+ unsigned int i = 0;
+ OT::hb_apply_context_t c (table_index, font, buffer);
+ c.set_recurse_func (Proxy::Lookup::apply_recurse_func);
+
+ for (unsigned int stage_index = 0; stage_index < stages[table_index].len; stage_index++) {
+ const stage_map_t *stage = &stages[table_index][stage_index];
+ for (; i < stage->last_lookup; i++)
+ {
+ unsigned int lookup_index = lookups[table_index][i].index;
+ c.set_lookup_mask (lookups[table_index][i].mask);
+ c.set_auto_zwj (lookups[table_index][i].auto_zwj);
+ apply_string<Proxy> (&c,
+ proxy.table.get_lookup (lookup_index),
+ proxy.accels[lookup_index]);
+ }
+
+ if (stage->pause_func)
+ {
+ buffer->clear_output ();
+ stage->pause_func (plan, font, buffer);
+ }
+ }
+}
+
+void hb_ot_map_t::substitute (const hb_ot_shape_plan_t *plan, hb_font_t *font, hb_buffer_t *buffer) const
+{
+ GSUBProxy proxy (font->face);
+ apply (proxy, plan, font, buffer);
+}
+
+void hb_ot_map_t::position (const hb_ot_shape_plan_t *plan, hb_font_t *font, hb_buffer_t *buffer) const
+{
+ GPOSProxy proxy (font->face);
+ apply (proxy, plan, font, buffer);
+}
+
+HB_INTERNAL void
+hb_ot_layout_substitute_lookup (OT::hb_apply_context_t *c,
+ const OT::SubstLookup &lookup,
+ const hb_ot_layout_lookup_accelerator_t &accel)
{
- GPOS::position_finish (font, buffer, zero_width_attached_marks);
+ apply_string<GSUBProxy> (c, lookup, accel);
}
projects / platform / upstream / harfbuzz.git / blobdiff