/*
- * Copyright (C) 1998-2004 David Turner and Werner Lemberg
- * Copyright (C) 2006 Behdad Esfahbod
- * Copyright (C) 2007,2008 Red Hat, Inc.
+ * Copyright © 1998-2004 David Turner and Werner Lemberg
+ * Copyright © 2006 Behdad Esfahbod
+ * Copyright © 2007,2008,2009 Red Hat, Inc.
*
- * This is part of HarfBuzz, an OpenType Layout engine library.
+ * This is part of HarfBuzz, a text shaping library.
*
* Permission is hereby granted, without written agreement and without
* license or royalty fees, to use, copy, modify, and distribute this
#define HB_OT_LAYOUT_CC
-#include "hb-ot-layout.h"
-#include "hb-ot-layout-private.h"
+#include "hb-ot-layout-private.hh"
-#include "hb-ot-layout-open-private.h"
-#include "hb-ot-layout-gdef-private.h"
-#include "hb-ot-layout-gsub-private.h"
+#include "hb-ot-layout-gdef-private.hh"
+#include "hb-ot-layout-gsub-private.hh"
+#include "hb-ot-layout-gpos-private.hh"
+#include "hb-ot-head-private.hh"
+#include "hb-ot-maxp-private.hh"
-/* XXX */
-#include "harfbuzz-buffer-private.h"
#include <stdlib.h>
#include <string.h>
+HB_BEGIN_DECLS
-struct _hb_ot_layout_t {
- const GDEF *gdef;
- const GSUB *gsub;
- const /*XXX*/GSUBGPOS *gpos;
-
- struct {
- unsigned char *klasses;
- unsigned int len;
- } new_gdef;
-
- /* TODO add max-nesting-level here? */
-};
hb_ot_layout_t *
-hb_ot_layout_create (void)
+_hb_ot_layout_create (hb_face_t *face)
{
+ /* TODO Remove this object altogether */
hb_ot_layout_t *layout = (hb_ot_layout_t *) calloc (1, sizeof (hb_ot_layout_t));
- layout->gdef = &NullGDEF;
- layout->gsub = &NullGSUB;
- layout->gpos = &/*XXX*/NullGSUBGPOS;
-
- return layout;
-}
-
-hb_ot_layout_t *
-hb_ot_layout_create_for_data (const char *font_data,
- int face_index)
-{
- hb_ot_layout_t *layout;
-
- if (HB_UNLIKELY (font_data == NULL))
- return hb_ot_layout_create ();
+ layout->gdef_blob = Sanitizer<GDEF>::sanitize (hb_face_reference_table (face, HB_OT_TAG_GDEF));
+ layout->gdef = Sanitizer<GDEF>::lock_instance (layout->gdef_blob);
- layout = (hb_ot_layout_t *) calloc (1, sizeof (hb_ot_layout_t));
+ layout->gsub_blob = Sanitizer<GSUB>::sanitize (hb_face_reference_table (face, HB_OT_TAG_GSUB));
+ layout->gsub = Sanitizer<GSUB>::lock_instance (layout->gsub_blob);
- const OpenTypeFontFile &font = OpenTypeFontFile::get_for_data (font_data);
- const OpenTypeFontFace &face = font.get_face (face_index);
+ layout->gpos_blob = Sanitizer<GPOS>::sanitize (hb_face_reference_table (face, HB_OT_TAG_GPOS));
+ layout->gpos = Sanitizer<GPOS>::lock_instance (layout->gpos_blob);
- layout->gdef = &GDEF::get_for_data (font.get_table_data (face.get_table_by_tag (GDEF::Tag)));
- layout->gsub = &GSUB::get_for_data (font.get_table_data (face.get_table_by_tag (GSUB::Tag)));
- layout->gpos = &/*XXX*/GSUBGPOS::get_for_data (font.get_table_data (face.get_table_by_tag (/*XXX*/GSUBGPOS::GPOSTag)));
+ layout->head_blob = Sanitizer<head>::sanitize (hb_face_reference_table (face, HB_OT_TAG_head));
+ layout->head = Sanitizer<head>::lock_instance (layout->head_blob);
return layout;
}
void
-hb_ot_layout_destroy (hb_ot_layout_t *layout)
+_hb_ot_layout_destroy (hb_ot_layout_t *layout)
{
+ hb_blob_destroy (layout->gdef_blob);
+ hb_blob_destroy (layout->gsub_blob);
+ hb_blob_destroy (layout->gpos_blob);
+ hb_blob_destroy (layout->head_blob);
+
free (layout);
}
-/*
- * GDEF
- */
-
-hb_bool_t
-hb_ot_layout_has_font_glyph_classes (hb_ot_layout_t *layout)
+static inline const GDEF&
+_get_gdef (hb_face_t *face)
{
- return layout->gdef->has_glyph_classes ();
+ return likely (face->ot_layout && face->ot_layout->gdef) ? *face->ot_layout->gdef : Null(GDEF);
}
-
-HB_OT_LAYOUT_INTERNAL hb_bool_t
-_hb_ot_layout_has_new_glyph_classes (hb_ot_layout_t *layout)
+static inline const GSUB&
+_get_gsub (hb_face_t *face)
{
- return layout->new_gdef.len > 0;
+ return likely (face->ot_layout && face->ot_layout->gsub) ? *face->ot_layout->gsub : Null(GSUB);
}
-
-HB_OT_LAYOUT_INTERNAL hb_ot_layout_glyph_properties_t
-_hb_ot_layout_get_glyph_properties (hb_ot_layout_t *layout,
- hb_codepoint_t glyph)
+static inline const GPOS&
+_get_gpos (hb_face_t *face)
{
- hb_ot_layout_class_t klass;
-
- /* TODO old harfbuzz doesn't always parse mark attachments as it says it was
- * introduced without a version bump, so it may not be safe */
- klass = layout->gdef->get_mark_attachment_type (glyph);
- if (klass)
- return klass << 8;
+ return likely (face->ot_layout && face->ot_layout->gpos) ? *face->ot_layout->gpos : Null(GPOS);
+}
+static inline const head&
+_get_head (hb_face_t *face)
+{
+ return likely (face->ot_layout && face->ot_layout->head) ? *face->ot_layout->head : Null(head);
+}
- klass = layout->gdef->get_glyph_class (glyph);
- if (!klass && glyph < layout->new_gdef.len)
- klass = layout->new_gdef.klasses[glyph];
+/*
+ * GDEF
+ */
- switch (klass) {
- default:
- case GDEF::UnclassifiedGlyph: return HB_OT_LAYOUT_GLYPH_CLASS_UNCLASSIFIED;
- case GDEF::BaseGlyph: return HB_OT_LAYOUT_GLYPH_CLASS_BASE_GLYPH;
- case GDEF::LigatureGlyph: return HB_OT_LAYOUT_GLYPH_CLASS_LIGATURE;
- case GDEF::MarkGlyph: return HB_OT_LAYOUT_GLYPH_CLASS_MARK;
- case GDEF::ComponentGlyph: return HB_OT_LAYOUT_GLYPH_CLASS_COMPONENT;
- }
+hb_bool_t
+hb_ot_layout_has_glyph_classes (hb_face_t *face)
+{
+ return _get_gdef (face).has_glyph_classes ();
}
-HB_OT_LAYOUT_INTERNAL hb_bool_t
-_hb_ot_layout_check_glyph_properties (hb_ot_layout_t *layout,
- HB_GlyphItem gitem,
- hb_ot_layout_lookup_flags_t lookup_flags,
- hb_ot_layout_glyph_properties_t *property)
+unsigned int
+_hb_ot_layout_get_glyph_property (hb_face_t *face,
+ hb_glyph_info_t *info)
{
- hb_ot_layout_glyph_class_t basic_glyph_class;
- hb_ot_layout_glyph_properties_t desired_attachment_class;
-
- if (gitem->gproperties == HB_BUFFER_GLYPH_PROPERTIES_UNKNOWN)
+ if (!info->props_cache())
{
- gitem->gproperties = *property = _hb_ot_layout_get_glyph_properties (layout, gitem->gindex);
- if (gitem->gproperties == HB_OT_LAYOUT_GLYPH_CLASS_UNCLASSIFIED)
- return false;
+ const GDEF &gdef = _get_gdef (face);
+ info->props_cache() = gdef.get_glyph_props (info->codepoint);
}
- *property = gitem->gproperties;
-
- /* If the glyph was found in the MarkAttachmentClass table,
- * then that class value is the high byte of the result,
- * otherwise the low byte contains the basic type of the glyph
- * as defined by the GlyphClassDef table.
- */
- if (*property & LookupFlag::MarkAttachmentType)
- basic_glyph_class = HB_OT_LAYOUT_GLYPH_CLASS_MARK;
- else
- basic_glyph_class = (hb_ot_layout_glyph_class_t) *property;
+ return info->props_cache();
+}
- /* Not covered, if, for example, basic_glyph_class
- * is HB_GDEF_LIGATURE and lookup_flags includes LookupFlags::IgnoreLigatures
+static hb_bool_t
+_hb_ot_layout_match_properties (hb_face_t *face,
+ hb_codepoint_t codepoint,
+ unsigned int glyph_props,
+ unsigned int lookup_props)
+{
+ /* Not covered, if, for example, glyph class is ligature and
+ * lookup_props includes LookupFlags::IgnoreLigatures
*/
- if (lookup_flags & basic_glyph_class)
+ if (glyph_props & lookup_props & LookupFlag::IgnoreFlags)
return false;
- /* The high byte of lookup_flags has the meaning
- * "ignore marks of attachment type different than
- * the attachment type specified."
- */
- desired_attachment_class = lookup_flags & LookupFlag::MarkAttachmentType;
- if (desired_attachment_class)
+ if (glyph_props & HB_OT_LAYOUT_GLYPH_CLASS_MARK)
{
- if (basic_glyph_class == HB_OT_LAYOUT_GLYPH_CLASS_MARK &&
- *property != desired_attachment_class )
- return false;
+ /* If using mark filtering sets, the high short of
+ * lookup_props has the set index.
+ */
+ if (lookup_props & LookupFlag::UseMarkFilteringSet)
+ return _get_gdef (face).mark_set_covers (lookup_props >> 16, codepoint);
+
+ /* The second byte of lookup_props has the meaning
+ * "ignore marks of attachment type different than
+ * the attachment type specified."
+ */
+ if (lookup_props & LookupFlag::MarkAttachmentType && glyph_props & LookupFlag::MarkAttachmentType)
+ return (lookup_props & LookupFlag::MarkAttachmentType) == (glyph_props & LookupFlag::MarkAttachmentType);
}
return true;
}
-
-hb_ot_layout_glyph_class_t
-hb_ot_layout_get_glyph_class (hb_ot_layout_t *layout,
- hb_codepoint_t glyph)
+hb_bool_t
+_hb_ot_layout_check_glyph_property (hb_face_t *face,
+ hb_glyph_info_t *ginfo,
+ unsigned int lookup_props,
+ unsigned int *property_out)
{
- hb_ot_layout_glyph_properties_t properties;
- hb_ot_layout_class_t klass;
+ unsigned int property;
- properties = _hb_ot_layout_get_glyph_properties (layout, glyph);
+ property = _hb_ot_layout_get_glyph_property (face, ginfo);
+ (void) (property_out && (*property_out = property));
- if (properties & 0xFF00)
- return HB_OT_LAYOUT_GLYPH_CLASS_MARK;
-
- return (hb_ot_layout_glyph_class_t) properties;
+ return _hb_ot_layout_match_properties (face, ginfo->codepoint, property, lookup_props);
}
-void
-hb_ot_layout_set_glyph_class (hb_ot_layout_t *layout,
- hb_codepoint_t glyph,
- hb_ot_layout_glyph_class_t klass)
+hb_bool_t
+_hb_ot_layout_skip_mark (hb_face_t *face,
+ hb_glyph_info_t *ginfo,
+ unsigned int lookup_props,
+ unsigned int *property_out)
{
- /* TODO optimize this, similar to old harfbuzz code for example */
-
- hb_ot_layout_class_t gdef_klass;
- int len = layout->new_gdef.len;
+ unsigned int property;
- if (glyph >= len) {
- int new_len;
- unsigned char *new_klasses;
+ property = _hb_ot_layout_get_glyph_property (face, ginfo);
+ (void) (property_out && (*property_out = property));
- new_len = len == 0 ? 120 : 2 * len;
- if (new_len > 65535)
- new_len = 65535;
- new_klasses = (unsigned char *) realloc (layout->new_gdef.klasses, new_len * sizeof (unsigned char));
+ /* If it's a mark, skip it we don't accept it. */
+ if (unlikely (property & HB_OT_LAYOUT_GLYPH_CLASS_MARK))
+ return !_hb_ot_layout_match_properties (face, ginfo->codepoint, property, lookup_props);
- if (G_UNLIKELY (!new_klasses))
- return;
-
- memset (new_klasses + len, 0, new_len - len);
+ /* If not a mark, don't skip. */
+ return false;
+}
- layout->new_gdef.klasses = new_klasses;
- layout->new_gdef.len = new_len;
- }
- switch (klass) {
- default:
- case HB_OT_LAYOUT_GLYPH_CLASS_UNCLASSIFIED: gdef_klass = GDEF::UnclassifiedGlyph; break;
- case HB_OT_LAYOUT_GLYPH_CLASS_BASE_GLYPH: gdef_klass = GDEF::BaseGlyph; break;
- case HB_OT_LAYOUT_GLYPH_CLASS_LIGATURE: gdef_klass = GDEF::LigatureGlyph; break;
- case HB_OT_LAYOUT_GLYPH_CLASS_MARK: gdef_klass = GDEF::MarkGlyph; break;
- case HB_OT_LAYOUT_GLYPH_CLASS_COMPONENT: gdef_klass = GDEF::ComponentGlyph; break;
- }
- layout->new_gdef.klasses[glyph] = gdef_klass;
- return;
+unsigned int
+hb_ot_layout_get_attach_points (hb_face_t *face,
+ hb_codepoint_t glyph,
+ unsigned int start_offset,
+ unsigned int *point_count /* IN/OUT */,
+ unsigned int *point_array /* OUT */)
+{
+ return _get_gdef (face).get_attach_points (glyph, start_offset, point_count, point_array);
}
-void
-hb_ot_layout_build_glyph_classes (hb_ot_layout_t *layout,
- uint16_t num_total_glyphs,
- hb_codepoint_t *glyphs,
- unsigned char *klasses,
- uint16_t count)
+unsigned int
+hb_ot_layout_get_ligature_carets (hb_font_t *font,
+ hb_direction_t direction,
+ hb_codepoint_t glyph,
+ unsigned int start_offset,
+ unsigned int *caret_count /* IN/OUT */,
+ int *caret_array /* OUT */)
{
- int i;
-
- if (G_UNLIKELY (!count || !glyphs || !klasses))
- return;
-
- if (layout->new_gdef.len == 0) {
- layout->new_gdef.klasses = (unsigned char *) calloc (num_total_glyphs, sizeof (unsigned char));
- layout->new_gdef.len = count;
- }
-
- for (i = 0; i < count; i++)
- hb_ot_layout_set_glyph_class (layout, glyphs[i], (hb_ot_layout_glyph_class_t) klasses[i]);
+ return _get_gdef (font->face).get_lig_carets (font, direction, glyph, start_offset, caret_count, caret_array);
}
/*
*/
static const GSUBGPOS&
-get_gsubgpos_table (hb_ot_layout_t *layout,
- hb_ot_layout_table_type_t table_type)
+get_gsubgpos_table (hb_face_t *face,
+ hb_tag_t table_tag)
{
- switch (table_type) {
- case HB_OT_LAYOUT_TABLE_TYPE_GSUB: return *(layout->gsub);
- case HB_OT_LAYOUT_TABLE_TYPE_GPOS: return *(layout->gpos);
- default: return NullGSUBGPOS;
+ 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);
}
}
unsigned int
-hb_ot_layout_table_get_script_count (hb_ot_layout_t *layout,
- hb_ot_layout_table_type_t table_type)
-{
- const GSUBGPOS &g = get_gsubgpos_table (layout, table_type);
-
- return g.get_script_count ();
-}
-
-hb_tag_t
-hb_ot_layout_table_get_script_tag (hb_ot_layout_t *layout,
- hb_ot_layout_table_type_t table_type,
- unsigned int script_index)
+hb_ot_layout_table_get_script_tags (hb_face_t *face,
+ hb_tag_t table_tag,
+ unsigned int start_offset,
+ unsigned int *script_count /* IN/OUT */,
+ hb_tag_t *script_tags /* OUT */)
{
- const GSUBGPOS &g = get_gsubgpos_table (layout, table_type);
+ const GSUBGPOS &g = get_gsubgpos_table (face, table_tag);
- return g.get_script_tag (script_index);
+ return g.get_script_tags (start_offset, script_count, script_tags);
}
hb_bool_t
-hb_ot_layout_table_find_script (hb_ot_layout_t *layout,
- hb_ot_layout_table_type_t table_type,
- hb_tag_t script_tag,
- unsigned int *script_index)
+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 (NO_INDEX == HB_OT_LAYOUT_NO_SCRIPT_INDEX);
- const GSUBGPOS &g = get_gsubgpos_table (layout, table_type);
+ ASSERT_STATIC (Index::NOT_FOUND_INDEX == HB_OT_LAYOUT_NO_SCRIPT_INDEX);
+ const GSUBGPOS &g = get_gsubgpos_table (face, table_tag);
if (g.find_script_index (script_tag, script_index))
return TRUE;
/* try finding 'DFLT' */
- if (g.find_script_index (HB_OT_LAYOUT_TAG_DEFAULT_SCRIPT, script_index))
+ if (g.find_script_index (HB_OT_TAG_DEFAULT_SCRIPT, script_index))
return FALSE;
- /* try with 'dflt'; MS site has had typos and many fonts use it now :( */
- if (g.find_script_index (HB_OT_LAYOUT_TAG_DEFAULT_LANGUAGE, script_index))
+ /* try with 'dflt'; MS site has had typos and many fonts use it now :(.
+ * including many versions of DejaVu Sans Mono! */
+ if (g.find_script_index (HB_OT_TAG_DEFAULT_LANGUAGE, script_index))
return FALSE;
if (script_index) *script_index = HB_OT_LAYOUT_NO_SCRIPT_INDEX;
return FALSE;
}
-unsigned int
-hb_ot_layout_table_get_feature_count (hb_ot_layout_t *layout,
- hb_ot_layout_table_type_t table_type)
-{
- const GSUBGPOS &g = get_gsubgpos_table (layout, table_type);
-
- return g.get_feature_count ();
-}
-
-hb_tag_t
-hb_ot_layout_table_get_feature_tag (hb_ot_layout_t *layout,
- hb_ot_layout_table_type_t table_type,
- unsigned int feature_index)
+hb_bool_t
+hb_ot_layout_table_choose_script (hb_face_t *face,
+ hb_tag_t table_tag,
+ const hb_tag_t *script_tags,
+ unsigned int *script_index)
{
- const GSUBGPOS &g = get_gsubgpos_table (layout, table_type);
+ ASSERT_STATIC (Index::NOT_FOUND_INDEX == HB_OT_LAYOUT_NO_SCRIPT_INDEX);
+ const GSUBGPOS &g = get_gsubgpos_table (face, table_tag);
- return g.get_feature_tag (feature_index);
-}
+ while (*script_tags)
+ {
+ if (g.find_script_index (*script_tags, script_index))
+ return TRUE;
+ script_tags++;
+ }
-hb_bool_t
-hb_ot_layout_table_find_feature (hb_ot_layout_t *layout,
- hb_ot_layout_table_type_t table_type,
- hb_tag_t feature_tag,
- unsigned int *feature_index)
-{
- ASSERT_STATIC (NO_INDEX == HB_OT_LAYOUT_NO_FEATURE_INDEX);
- const GSUBGPOS &g = get_gsubgpos_table (layout, table_type);
+ /* try finding 'DFLT' */
+ if (g.find_script_index (HB_OT_TAG_DEFAULT_SCRIPT, script_index))
+ return FALSE;
- if (g.find_feature_index (feature_tag, feature_index))
- return TRUE;
+ /* try with 'dflt'; MS site has had typos and many fonts use it now :( */
+ if (g.find_script_index (HB_OT_TAG_DEFAULT_LANGUAGE, script_index))
+ return FALSE;
- if (feature_index) *feature_index = HB_OT_LAYOUT_NO_FEATURE_INDEX;
+ if (script_index) *script_index = HB_OT_LAYOUT_NO_SCRIPT_INDEX;
return FALSE;
}
unsigned int
-hb_ot_layout_table_get_lookup_count (hb_ot_layout_t *layout,
- hb_ot_layout_table_type_t table_type)
+hb_ot_layout_table_get_feature_tags (hb_face_t *face,
+ hb_tag_t table_tag,
+ unsigned int start_offset,
+ unsigned int *feature_count /* IN/OUT */,
+ hb_tag_t *feature_tags /* OUT */)
{
- const GSUBGPOS &g = get_gsubgpos_table (layout, table_type);
+ const GSUBGPOS &g = get_gsubgpos_table (face, table_tag);
- return g.get_lookup_count ();
+ return g.get_feature_tags (start_offset, feature_count, feature_tags);
}
unsigned int
-hb_ot_layout_script_get_language_count (hb_ot_layout_t *layout,
- hb_ot_layout_table_type_t table_type,
- unsigned int script_index)
-{
- const Script &s = get_gsubgpos_table (layout, table_type).get_script (script_index);
-
- return s.get_lang_sys_count ();
-}
-
-hb_tag_t
-hb_ot_layout_script_get_language_tag (hb_ot_layout_t *layout,
- hb_ot_layout_table_type_t table_type,
- unsigned int script_index,
- unsigned int language_index)
+hb_ot_layout_script_get_language_tags (hb_face_t *face,
+ hb_tag_t table_tag,
+ unsigned int script_index,
+ unsigned int start_offset,
+ unsigned int *language_count /* IN/OUT */,
+ hb_tag_t *language_tags /* OUT */)
{
- const Script &s = get_gsubgpos_table (layout, table_type).get_script (script_index);
+ const Script &s = get_gsubgpos_table (face, table_tag).get_script (script_index);
- return s.get_lang_sys_tag (language_index);
+ return s.get_lang_sys_tags (start_offset, language_count, language_tags);
}
hb_bool_t
-hb_ot_layout_script_find_language (hb_ot_layout_t *layout,
- hb_ot_layout_table_type_t table_type,
- unsigned int script_index,
- hb_tag_t language_tag,
- unsigned int *language_index)
+hb_ot_layout_script_find_language (hb_face_t *face,
+ hb_tag_t table_tag,
+ unsigned int script_index,
+ hb_tag_t language_tag,
+ unsigned int *language_index)
{
- ASSERT_STATIC (NO_INDEX == HB_OT_LAYOUT_DEFAULT_LANGUAGE_INDEX);
- const Script &s = get_gsubgpos_table (layout, table_type).get_script (script_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);
if (s.find_lang_sys_index (language_tag, language_index))
return TRUE;
/* try with 'dflt'; MS site has had typos and many fonts use it now :( */
- if (s.find_lang_sys_index (HB_OT_LAYOUT_TAG_DEFAULT_LANGUAGE, language_index))
+ if (s.find_lang_sys_index (HB_OT_TAG_DEFAULT_LANGUAGE, language_index))
return FALSE;
if (language_index) *language_index = HB_OT_LAYOUT_DEFAULT_LANGUAGE_INDEX;
}
hb_bool_t
-hb_ot_layout_language_get_required_feature_index (hb_ot_layout_t *layout,
- hb_ot_layout_table_type_t table_type,
- unsigned int script_index,
- unsigned int language_index,
- unsigned int *feature_index)
+hb_ot_layout_language_get_required_feature_index (hb_face_t *face,
+ hb_tag_t table_tag,
+ unsigned int script_index,
+ unsigned int language_index,
+ unsigned int *feature_index)
{
- const LangSys &l = get_gsubgpos_table (layout, table_type).get_script (script_index).get_lang_sys (language_index);
+ const LangSys &l = get_gsubgpos_table (face, table_tag).get_script (script_index).get_lang_sys (language_index);
if (feature_index) *feature_index = l.get_required_feature_index ();
}
unsigned int
-hb_ot_layout_language_get_feature_count (hb_ot_layout_t *layout,
- hb_ot_layout_table_type_t table_type,
- unsigned int script_index,
- unsigned int language_index)
+hb_ot_layout_language_get_feature_indexes (hb_face_t *face,
+ hb_tag_t table_tag,
+ unsigned int script_index,
+ unsigned int language_index,
+ unsigned int start_offset,
+ unsigned int *feature_count /* IN/OUT */,
+ unsigned int *feature_indexes /* OUT */)
{
- const LangSys &l = get_gsubgpos_table (layout, table_type).get_script (script_index).get_lang_sys (language_index);
+ const GSUBGPOS &g = get_gsubgpos_table (face, table_tag);
+ const LangSys &l = g.get_script (script_index).get_lang_sys (language_index);
- return l.get_feature_count ();
+ return l.get_feature_indexes (start_offset, feature_count, feature_indexes);
}
unsigned int
-hb_ot_layout_language_get_feature_index (hb_ot_layout_t *layout,
- hb_ot_layout_table_type_t table_type,
- unsigned int script_index,
- unsigned int language_index,
- unsigned int num_feature)
+hb_ot_layout_language_get_feature_tags (hb_face_t *face,
+ hb_tag_t table_tag,
+ unsigned int script_index,
+ unsigned int language_index,
+ unsigned int start_offset,
+ unsigned int *feature_count /* IN/OUT */,
+ hb_tag_t *feature_tags /* OUT */)
{
- const GSUBGPOS &g = get_gsubgpos_table (layout, table_type);
+ const GSUBGPOS &g = get_gsubgpos_table (face, table_tag);
const LangSys &l = g.get_script (script_index).get_lang_sys (language_index);
- return l.get_feature_index (num_feature);
-}
+ 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
-hb_ot_layout_language_get_feature_tag (hb_ot_layout_t *layout,
- hb_ot_layout_table_type_t table_type,
- unsigned int script_index,
- unsigned int language_index,
- unsigned int num_feature)
-{
- const GSUBGPOS &g = get_gsubgpos_table (layout, table_type);
- const LangSys &l = g.get_script (script_index).get_lang_sys (language_index);
- unsigned int feature_index = l.get_feature_index (num_feature);
+ if (feature_tags) {
+ unsigned int count = *feature_count;
+ for (unsigned int i = 0; i < count; i++)
+ feature_tags[i] = g.get_feature_tag ((unsigned int) feature_tags[i]);
+ }
- return g.get_feature_tag (feature_index);
+ return ret;
}
hb_bool_t
-hb_ot_layout_language_find_feature (hb_ot_layout_t *layout,
- hb_ot_layout_table_type_t table_type,
- unsigned int script_index,
- unsigned int language_index,
- hb_tag_t feature_tag,
- unsigned int *feature_index)
-{
- ASSERT_STATIC (NO_INDEX == HB_OT_LAYOUT_NO_FEATURE_INDEX);
- const GSUBGPOS &g = get_gsubgpos_table (layout, table_type);
+hb_ot_layout_language_find_feature (hb_face_t *face,
+ hb_tag_t table_tag,
+ unsigned int script_index,
+ unsigned int language_index,
+ 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);
- unsigned int i;
- for (i = 0; i < l.get_feature_count (); i++) {
+ unsigned int num_features = l.get_feature_count ();
+ for (unsigned int i = 0; i < num_features; i++) {
unsigned int f_index = l.get_feature_index (i);
if (feature_tag == g.get_feature_tag (f_index)) {
}
unsigned int
-hb_ot_layout_feature_get_lookup_count (hb_ot_layout_t *layout,
- hb_ot_layout_table_type_t table_type,
- unsigned int feature_index)
+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 */)
{
- const GSUBGPOS &g = get_gsubgpos_table (layout, table_type);
+ const GSUBGPOS &g = get_gsubgpos_table (face, table_tag);
const Feature &f = g.get_feature (feature_index);
- return f.get_lookup_count ();
+ return f.get_lookup_indexes (start_offset, lookup_count, lookup_indexes);
}
-unsigned int
-hb_ot_layout_feature_get_lookup_index (hb_ot_layout_t *layout,
- hb_ot_layout_table_type_t table_type,
- unsigned int feature_index,
- unsigned int num_lookup)
-{
- const GSUBGPOS &g = get_gsubgpos_table (layout, table_type);
- const Feature &f = g.get_feature (feature_index);
-
- return f.get_lookup_index (num_lookup);
-}
/*
* GSUB
*/
hb_bool_t
-hb_ot_layout_substitute_lookup (hb_ot_layout_t *layout,
- hb_buffer_t *buffer,
- unsigned int lookup_index,
- hb_ot_layout_feature_mask_t mask)
+hb_ot_layout_has_substitution (hb_face_t *face)
+{
+ return &_get_gsub (face) != &Null(GSUB);
+}
+
+void
+hb_ot_layout_substitute_start (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;
+}
+
+hb_bool_t
+hb_ot_layout_substitute_lookup (hb_face_t *face,
+ hb_buffer_t *buffer,
+ unsigned int lookup_index,
+ hb_mask_t mask)
{
- const GSUB &gsub = *(layout->gsub);
- const SubstLookup &l = gsub.get_lookup (lookup_index);
- unsigned int lookup_type = l.get_type ();
- unsigned int nesting_level_left = HB_OT_LAYOUT_MAX_NESTING_LEVEL;
- unsigned int context_length = NO_CONTEXT;
- bool handled, ret = false;
+ return _get_gsub (face).substitute_lookup (face, buffer, lookup_index, mask);
+}
- if (!l.is_reverse ()) {
+void
+hb_ot_layout_substitute_finish (hb_buffer_t *buffer HB_UNUSED)
+{
+}
- /* in/out forward substitution */
- _hb_buffer_clear_output (buffer);
- buffer->in_pos = 0;
- while (buffer->in_pos < buffer->in_length) {
- if ((~IN_PROPERTIES (buffer->in_pos) & mask) &&
- l.substitute (layout, buffer, context_length, nesting_level_left))
- ret = true;
- else
- _hb_buffer_copy_output_glyph (buffer);
+/*
+ * GPOS
+ */
- }
- _hb_buffer_swap (buffer);
+hb_bool_t
+hb_ot_layout_has_positioning (hb_face_t *face)
+{
+ return &_get_gpos (face) != &Null(GPOS);
+}
- } else {
+void
+hb_ot_layout_position_start (hb_buffer_t *buffer)
+{
+ buffer->clear_positions ();
+}
- /* in-place backward substitution */
- buffer->in_pos = buffer->in_length - 1;
- do {
+hb_bool_t
+hb_ot_layout_position_lookup (hb_font_t *font,
+ hb_buffer_t *buffer,
+ unsigned int lookup_index,
+ hb_mask_t mask)
+{
+ return _get_gpos (font->face).position_lookup (font, buffer, lookup_index, mask);
+}
- if ((~IN_PROPERTIES (buffer->in_pos) & mask) &&
- l.substitute (layout, buffer, context_length, nesting_level_left))
- ret = true;
- else
- buffer->in_pos--;
+void
+hb_ot_layout_position_finish (hb_buffer_t *buffer)
+{
+ GPOS::position_finish (buffer);
+}
- } while (buffer->in_pos);
- }
+/*
+ * head
+ */
- return ret;
+unsigned int
+_hb_ot_layout_get_upem (hb_face_t *face)
+{
+ return _get_head (face).get_upem ();
}
+
+
+HB_END_DECLS
projects / framework / uifw / harfbuzz.git / blobdiff