/*
* Copyright (C) 1998-2004 David Turner and Werner Lemberg
* Copyright (C) 2006 Behdad Esfahbod
- * Copyright (C) 2007,2008 Red Hat, Inc.
+ * Copyright (C) 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"
-/* XXX */
-#include "harfbuzz-buffer-private.h"
#include <stdlib.h>
#include <string.h>
+HB_BEGIN_DECLS
+
hb_ot_layout_t *
-hb_ot_layout_create (void)
+_hb_ot_layout_new (hb_face_t *face)
{
+ /* Remove this object altogether */
hb_ot_layout_t *layout = (hb_ot_layout_t *) calloc (1, sizeof (hb_ot_layout_t));
- layout->gdef = &Null(GDEF);
- layout->gsub = &Null(GSUB);
- layout->gpos = &/*XXX*/Null(GSUBGPOS);
+ layout->gdef_blob = Sanitizer<GDEF>::sanitize (hb_face_get_table (face, HB_OT_TAG_GDEF));
+ layout->gdef = Sanitizer<GDEF>::lock_instance (layout->gdef_blob);
+
+ layout->gsub_blob = Sanitizer<GSUB>::sanitize (hb_face_get_table (face, HB_OT_TAG_GSUB));
+ layout->gsub = Sanitizer<GSUB>::lock_instance (layout->gsub_blob);
+
+ layout->gpos_blob = Sanitizer<GPOS>::sanitize (hb_face_get_table (face, HB_OT_TAG_GPOS));
+ layout->gpos = Sanitizer<GPOS>::lock_instance (layout->gpos_blob);
return layout;
}
-hb_ot_layout_t *
-hb_ot_layout_create_for_data (const char *font_data,
- int face_index)
+void
+_hb_ot_layout_free (hb_ot_layout_t *layout)
{
- hb_ot_layout_t *layout;
+ hb_blob_unlock (layout->gdef_blob);
+ hb_blob_unlock (layout->gsub_blob);
+ hb_blob_unlock (layout->gpos_blob);
- if (HB_UNLIKELY (font_data == NULL))
- return hb_ot_layout_create ();
+ hb_blob_destroy (layout->gdef_blob);
+ hb_blob_destroy (layout->gsub_blob);
+ hb_blob_destroy (layout->gpos_blob);
- layout = (hb_ot_layout_t *) calloc (1, sizeof (hb_ot_layout_t));
-
- const OpenTypeFontFile &font = OpenTypeFontFile::get_for_data (font_data);
- const OpenTypeFontFace &face = font.get_face (face_index);
+ free (layout);
+}
- 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)));
+static const GDEF&
+_get_gdef (hb_face_t *face)
+{
+ return likely (face->ot_layout && face->ot_layout->gdef) ? *face->ot_layout->gdef : Null(GDEF);
+}
- return layout;
+static const GSUB&
+_get_gsub (hb_face_t *face)
+{
+ return likely (face->ot_layout && face->ot_layout->gsub) ? *face->ot_layout->gsub : Null(GSUB);
}
-void
-hb_ot_layout_destroy (hb_ot_layout_t *layout)
+static const GPOS&
+_get_gpos (hb_face_t *face)
{
- free (layout);
+ return likely (face->ot_layout && face->ot_layout->gpos) ? *face->ot_layout->gpos : Null(GPOS);
}
+
/*
* GDEF
*/
-/* XXX the public class_t is a mess */
-
hb_bool_t
-hb_ot_layout_has_font_glyph_classes (hb_ot_layout_t *layout)
+hb_ot_layout_has_glyph_classes (hb_face_t *face)
{
- return layout->gdef->has_glyph_classes ();
+ return _get_gdef (face).has_glyph_classes ();
}
-HB_OT_LAYOUT_INTERNAL hb_bool_t
-_hb_ot_layout_has_new_glyph_classes (hb_ot_layout_t *layout)
+static unsigned int
+_hb_ot_layout_get_glyph_property_from_gdef (hb_face_t *face,
+ hb_glyph_info_t *info)
{
- return layout->new_gdef.len > 0;
-}
+ hb_codepoint_t glyph = info->codepoint;
-HB_OT_LAYOUT_INTERNAL unsigned int
-_hb_ot_layout_get_glyph_property (hb_ot_layout_t *layout,
- hb_codepoint_t glyph)
-{
- 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;
+ unsigned int klass;
+ const GDEF &gdef = _get_gdef (face);
- klass = layout->gdef->get_glyph_class (glyph);
-
- if (!klass && glyph < layout->new_gdef.len)
- klass = layout->new_gdef.klasses[glyph];
+ klass = gdef.get_glyph_class (glyph);
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;
+ case GDEF::MarkGlyph:
+ klass = gdef.get_mark_attachment_type (glyph);
+ return HB_OT_LAYOUT_GLYPH_CLASS_MARK | (klass << 8);
}
}
-HB_OT_LAYOUT_INTERNAL hb_bool_t
-_hb_ot_layout_check_glyph_property (hb_ot_layout_t *layout,
- HB_GlyphItem gitem,
- unsigned int lookup_flags,
- unsigned int *property)
+static inline 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;
- unsigned int desired_attachment_class;
+ if (!info->gproperty())
+ info->gproperty() = _hb_ot_layout_get_glyph_property_from_gdef (face, info);
- if (gitem->gproperty == HB_BUFFER_GLYPH_PROPERTIES_UNKNOWN)
- {
- gitem->gproperty = *property = _hb_ot_layout_get_glyph_property (layout, gitem->gindex);
- if (gitem->gproperty == HB_OT_LAYOUT_GLYPH_CLASS_UNCLASSIFIED)
- return false;
- }
+ return info->gproperty();
+}
- *property = gitem->gproperty;
+hb_bool_t
+_hb_ot_layout_check_glyph_property (hb_face_t *face,
+ hb_glyph_info_t *ginfo,
+ unsigned int lookup_flags,
+ unsigned int *property_out)
+{
+ unsigned int property;
- /* 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;
+ property = _hb_ot_layout_get_glyph_property (face, ginfo);
+ if (property_out)
+ *property_out = property;
- /* Not covered, if, for example, basic_glyph_class
- * is HB_GDEF_LIGATURE and lookup_flags includes LookupFlags::IgnoreLigatures
+ /* Not covered, if, for example, glyph class is ligature and
+ * lookup_flags includes LookupFlags::IgnoreLigatures
*/
- if (lookup_flags & basic_glyph_class)
+ if (property & lookup_flags & 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 (property & 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_flags has the set index.
+ */
+ if (lookup_flags & LookupFlag::UseMarkFilteringSet)
+ return _get_gdef (face).mark_set_covers (lookup_flags >> 16, ginfo->codepoint);
+
+ /* The second byte of lookup_flags has the meaning
+ * "ignore marks of attachment type different than
+ * the attachment type specified."
+ */
+ if (lookup_flags & LookupFlag::MarkAttachmentType && property & LookupFlag::MarkAttachmentType)
+ return (lookup_flags & LookupFlag::MarkAttachmentType) == (property & LookupFlag::MarkAttachmentType);
}
return true;
}
-HB_OT_LAYOUT_INTERNAL void
-_hb_ot_layout_set_glyph_property (hb_ot_layout_t *layout,
- hb_codepoint_t glyph,
- unsigned int property)
-{
- hb_ot_layout_glyph_class_t klass;
-
- if (property & LookupFlag::MarkAttachmentType)
- klass = HB_OT_LAYOUT_GLYPH_CLASS_MARK;
- else
- klass = (hb_ot_layout_glyph_class_t) property;
-
- hb_ot_layout_set_glyph_class (layout, glyph, klass);
-}
-
-
-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_skip_mark (hb_face_t *face,
+ hb_glyph_info_t *ginfo,
+ unsigned int lookup_flags,
+ unsigned int *property_out)
{
unsigned int property;
- hb_ot_layout_class_t klass;
- property = _hb_ot_layout_get_glyph_property (layout, glyph);
+ property = _hb_ot_layout_get_glyph_property (face, ginfo);
+ if (property_out)
+ *property_out = property;
- if (property & LookupFlag::MarkAttachmentType)
- return HB_OT_LAYOUT_GLYPH_CLASS_MARK;
+ if (property & HB_OT_LAYOUT_GLYPH_CLASS_MARK)
+ {
+ /* Skip mark if lookup_flags includes LookupFlags::IgnoreMarks */
+ if (lookup_flags & LookupFlag::IgnoreMarks)
+ return true;
+
+ /* If using mark filtering sets, the high short of lookup_flags has the set index. */
+ if (lookup_flags & LookupFlag::UseMarkFilteringSet)
+ return !_get_gdef (face).mark_set_covers (lookup_flags >> 16, ginfo->codepoint);
+
+ /* The second byte of lookup_flags has the meaning "ignore marks of attachment type
+ * different than the attachment type specified." */
+ if (lookup_flags & LookupFlag::MarkAttachmentType && property & LookupFlag::MarkAttachmentType)
+ return (lookup_flags & LookupFlag::MarkAttachmentType) != (property & LookupFlag::MarkAttachmentType);
+ }
- return (hb_ot_layout_glyph_class_t) property;
+ return false;
}
-void
-hb_ot_layout_set_glyph_class (hb_ot_layout_t *layout,
- hb_codepoint_t glyph,
- hb_ot_layout_glyph_class_t klass)
+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 */)
{
- /* TODO optimize this, similar to old harfbuzz code for example */
-
- hb_ot_layout_class_t gdef_klass;
- int len = layout->new_gdef.len;
-
- if (G_UNLIKELY (glyph > 65535))
- return;
-
- if (glyph >= len) {
- int new_len;
- unsigned char *new_klasses;
-
- 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 (G_UNLIKELY (!new_klasses))
- return;
-
- memset (new_klasses + len, 0, new_len - len);
-
- 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;
+ 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_face_t *face,
+ hb_direction_t direction,
+ hb_codepoint_t glyph,
+ unsigned int start_offset,
+ unsigned int *caret_count /* IN/OUT */,
+ int *caret_array /* OUT */)
{
- 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 (unsigned int i = 0; i < count; i++)
- hb_ot_layout_set_glyph_class (layout, glyphs[i], (hb_ot_layout_glyph_class_t) klasses[i]);
+ hb_ot_layout_context_t c;
+ c.font = font;
+ c.face = face;
+ return _get_gdef (face).get_lig_carets (&c, 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 Null(GSUBGPOS);
+ 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)
-{
- const LangSys &l = get_gsubgpos_table (layout, table_type).get_script (script_index).get_lang_sys (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 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)
-{
- const GSUBGPOS &g = get_gsubgpos_table (layout, table_type);
+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 (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 num_features = l.get_feature_count ();
}
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)
-{
- const GSUBGPOS &g = get_gsubgpos_table (layout, table_type);
+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 (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 layout->gsub->substitute_lookup (layout, buffer, lookup_index, mask);
+ return &_get_gsub (face) != &Null(GSUB);
}
-
-
-/* XXX dupped, until he old code can be removed */
-
-static HB_Error
-hb_buffer_duplicate_out_buffer( HB_Buffer buffer )
+hb_bool_t
+hb_ot_layout_substitute_lookup (hb_face_t *face,
+ hb_buffer_t *buffer,
+ unsigned int lookup_index,
+ hb_mask_t mask)
{
- if ( !buffer->alt_string )
- {
- HB_Error error;
+ hb_ot_layout_context_t c;
+ c.font = NULL;
+ c.face = face;
+ return _get_gsub (face).substitute_lookup (&c, buffer, lookup_index, mask);
+}
- if ( ALLOC_ARRAY( buffer->alt_string, buffer->allocated, HB_GlyphItemRec ) )
- return error;
- }
- buffer->out_string = buffer->alt_string;
- memcpy( buffer->out_string, buffer->in_string, buffer->out_length * sizeof (buffer->out_string[0]) );
- buffer->separate_out = TRUE;
+/*
+ * GPOS
+ */
- return HB_Err_Ok;
+hb_bool_t
+hb_ot_layout_has_positioning (hb_face_t *face)
+{
+ return &_get_gpos (face) != &Null(GPOS);
}
+hb_bool_t
+hb_ot_layout_position_lookup (hb_font_t *font,
+ hb_face_t *face,
+ hb_buffer_t *buffer,
+ unsigned int lookup_index,
+ hb_mask_t mask)
+{
+ hb_ot_layout_context_t c;
+ c.font = font;
+ c.face = face;
+ return _get_gpos (face).position_lookup (&c, buffer, lookup_index, mask);
+}
-
-HB_INTERNAL HB_Error
-_hb_buffer_add_output_glyph_ids( HB_Buffer buffer,
- HB_UShort num_in,
- HB_UShort num_out,
- const GlyphID *glyph_data,
- HB_UShort component,
- HB_UShort ligID )
+void
+hb_ot_layout_position_finish (hb_font_t *font HB_UNUSED,
+ hb_face_t *face HB_UNUSED,
+ hb_buffer_t *buffer)
{
- HB_Error error;
- HB_UShort i;
- HB_UInt properties;
- HB_UInt cluster;
+ unsigned int i, j;
+ unsigned int len = hb_buffer_get_length (buffer);
+ hb_glyph_position_t *pos = hb_buffer_get_glyph_positions (buffer);
+ hb_direction_t direction = buffer->props.direction;
- error = hb_buffer_ensure( buffer, buffer->out_pos + num_out );
- if ( error )
- return error;
+ /* TODO: Vertical */
- if ( !buffer->separate_out )
- {
- error = hb_buffer_duplicate_out_buffer( buffer );
- if ( error )
- return error;
+ /* Handle cursive connections:
+ * First handle all chain-back connections, then handle all chain-forward connections. */
+ if (likely (HB_DIRECTION_IS_HORIZONTAL (direction)))
+ {
+ for (j = 0; j < len; j++) {
+ if (pos[j].cursive_chain() < 0)
+ pos[j].y_offset += pos[j + pos[j].cursive_chain()].y_offset;
}
-
- properties = buffer->in_string[buffer->in_pos].properties;
- cluster = buffer->in_string[buffer->in_pos].cluster;
- if ( component == 0xFFFF )
- component = buffer->in_string[buffer->in_pos].component;
- if ( ligID == 0xFFFF )
- ligID = buffer->in_string[buffer->in_pos].ligID;
-
- for ( i = 0; i < num_out; i++ )
+ for (i = len; i > 0; i--) {
+ j = i - 1;
+ if (pos[j].cursive_chain() > 0)
+ pos[j].y_offset += pos[j + pos[j].cursive_chain()].y_offset;
+ }
+ }
+ else
{
- HB_GlyphItem item = &buffer->out_string[buffer->out_pos + i];
-
- item->gindex = glyph_data[i];
- item->properties = properties;
- item->cluster = cluster;
- item->component = component;
- item->ligID = ligID;
- item->gproperty = HB_GLYPH_PROPERTY_UNKNOWN;
+ for (j = 0; j < len; j++) {
+ if (pos[j].cursive_chain() < 0)
+ pos[j].x_offset += pos[j + pos[j].cursive_chain()].x_offset;
+ }
+ for (i = len; i > 0; i--) {
+ j = i - 1;
+ if (pos[j].cursive_chain() > 0)
+ pos[j].x_offset += pos[j + pos[j].cursive_chain()].x_offset;
+ }
}
- buffer->in_pos += num_in;
- buffer->out_pos += num_out;
- buffer->out_length = buffer->out_pos;
-
- return HB_Err_Ok;
+ /* Handle attachments */
+ for (i = 0; i < len; i++)
+ if (pos[i].back())
+ {
+ unsigned int back = i - pos[i].back();
+ pos[i].x_offset += pos[back].x_offset;
+ pos[i].y_offset += pos[back].y_offset;
+
+ if (HB_DIRECTION_IS_BACKWARD (buffer->props.direction))
+ for (j = back + 1; j < i + 1; j++) {
+ pos[i].x_offset += pos[j].x_advance;
+ pos[i].y_offset += pos[j].y_advance;
+ }
+ else
+ for (j = back; j < i; j++) {
+ pos[i].x_offset -= pos[j].x_advance;
+ pos[i].y_offset -= pos[j].y_advance;
+ }
+ }
}
+
+HB_END_DECLS
projects / profile / ivi / org.tizen.video-player.git / blobdiff