* Copyright (C) 2006 Behdad Esfahbod
* 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-private.h"
+#include "hb-ot-layout-private.hh"
#include "hb-ot-layout-gdef-private.hh"
#include "hb-ot-layout-gsub-private.hh"
#include <stdlib.h>
#include <string.h>
+HB_BEGIN_DECLS
-void
-_hb_ot_layout_init (hb_ot_layout_t *layout)
+
+hb_ot_layout_t *
+_hb_ot_layout_new (hb_face_t *face)
{
- layout->gdef = NULL;
- layout->gsub = NULL;
- layout->gpos = NULL;
+ /* Remove this object altogether */
+ hb_ot_layout_t *layout = (hb_ot_layout_t *) calloc (1, sizeof (hb_ot_layout_t));
+
+ 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;
}
void
-_hb_ot_layout_fini (hb_ot_layout_t *layout)
+_hb_ot_layout_free (hb_ot_layout_t *layout)
{
-}
+ hb_blob_unlock (layout->gdef_blob);
+ hb_blob_unlock (layout->gsub_blob);
+ hb_blob_unlock (layout->gpos_blob);
-static hb_ot_layout_t *
-_hb_ot_face_get_layout (hb_face_t *face)
-{
- return &face->ot_layout;
+ hb_blob_destroy (layout->gdef_blob);
+ hb_blob_destroy (layout->gsub_blob);
+ hb_blob_destroy (layout->gpos_blob);
+
+ free (layout);
}
static const GDEF&
_get_gdef (hb_face_t *face)
{
-#if 0
- if (HB_UNLIKELY (!layout->face))
- return Null(GDEF);
-
- if (HB_UNLIKELY (!layout->gdef)) {
- hb_blob_t *blob = hb_face_get_table (face, HB_OT_TAG_GDEF);
- unsigned int length;
- const char *data = hb_blob_get_data (blob,
- layout->gdef = &GDEF::get_for_data (font.get_table_data (face.get_table_by_tag (GDEF::Tag)));
- layout->gdef = &Null(GDEF);
- }
-
- return *layout->gdef;
-#endif
+ return likely (face->ot_layout && face->ot_layout->gdef) ? *face->ot_layout->gdef : Null(GDEF);
}
static const GSUB&
_get_gsub (hb_face_t *face)
{
- return Null(GSUB);
+ return likely (face->ot_layout && face->ot_layout->gsub) ? *face->ot_layout->gsub : Null(GSUB);
}
static const GPOS&
_get_gpos (hb_face_t *face)
{
- return Null(GPOS);
+ return likely (face->ot_layout && face->ot_layout->gpos) ? *face->ot_layout->gpos : Null(GPOS);
}
* GDEF
*/
-/* TODO the public class_t is a mess */
-
hb_bool_t
-hb_ot_layout_has_font_glyph_classes (hb_face_t *face)
+hb_ot_layout_has_glyph_classes (hb_face_t *face)
{
return _get_gdef (face).has_glyph_classes ();
}
-HB_INTERNAL hb_bool_t
-_hb_ot_layout_has_new_glyph_classes (hb_face_t *face)
-{
- return face->ot_layout.new_gdef.len > 0;
-}
-
static unsigned int
-_hb_ot_layout_get_glyph_property (hb_face_t *face,
- hb_codepoint_t glyph)
+_hb_ot_layout_get_glyph_property_from_gdef (hb_face_t *face,
+ hb_glyph_info_t *info)
{
- hb_ot_layout_class_t klass;
+ hb_codepoint_t glyph = info->codepoint;
+
+ unsigned int klass;
const GDEF &gdef = _get_gdef (face);
klass = gdef.get_glyph_class (glyph);
- if (!klass && glyph < face->ot_layout.new_gdef.len)
- klass = face->ot_layout.new_gdef.klasses[glyph];
-
switch (klass) {
default:
case GDEF::UnclassifiedGlyph: return HB_OT_LAYOUT_GLYPH_CLASS_UNCLASSIFIED;
case GDEF::LigatureGlyph: return HB_OT_LAYOUT_GLYPH_CLASS_LIGATURE;
case GDEF::ComponentGlyph: return HB_OT_LAYOUT_GLYPH_CLASS_COMPONENT;
case GDEF::MarkGlyph:
- /* 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 = gdef.get_mark_attachment_type (glyph);
- return HB_OT_LAYOUT_GLYPH_CLASS_MARK + (klass << 8);
+ return HB_OT_LAYOUT_GLYPH_CLASS_MARK | (klass << 8);
}
}
-HB_INTERNAL hb_bool_t
+static inline unsigned int
+_hb_ot_layout_get_glyph_property (hb_face_t *face,
+ hb_glyph_info_t *info)
+{
+ if (!info->gproperty())
+ info->gproperty() = _hb_ot_layout_get_glyph_property_from_gdef (face, info);
+
+ return info->gproperty();
+}
+
+hb_bool_t
_hb_ot_layout_check_glyph_property (hb_face_t *face,
- hb_internal_glyph_info_t *ginfo,
+ hb_glyph_info_t *ginfo,
unsigned int lookup_flags,
unsigned int *property_out)
{
unsigned int property;
- if (ginfo->gproperty == HB_BUFFER_GLYPH_PROPERTIES_UNKNOWN)
- ginfo->gproperty = _hb_ot_layout_get_glyph_property (face, ginfo->codepoint);
- property = ginfo->gproperty;
+ property = _hb_ot_layout_get_glyph_property (face, ginfo);
if (property_out)
*property_out = property;
/* Not covered, if, for example, glyph class is ligature and
* lookup_flags includes LookupFlags::IgnoreLigatures
*/
- if (property & lookup_flags)
+ if (property & lookup_flags & LookupFlag::IgnoreFlags)
return false;
if (property & HB_OT_LAYOUT_GLYPH_CLASS_MARK)
return true;
}
-HB_INTERNAL hb_bool_t
+hb_bool_t
_hb_ot_layout_skip_mark (hb_face_t *face,
- hb_internal_glyph_info_t *ginfo,
+ hb_glyph_info_t *ginfo,
unsigned int lookup_flags,
unsigned int *property_out)
{
unsigned int property;
- if (ginfo->gproperty == HB_BUFFER_GLYPH_PROPERTIES_UNKNOWN)
- ginfo->gproperty = _hb_ot_layout_get_glyph_property (face, ginfo->codepoint);
- property = ginfo->gproperty;
+ property = _hb_ot_layout_get_glyph_property (face, ginfo);
if (property_out)
*property_out = property;
return false;
}
-HB_INTERNAL void
-_hb_ot_layout_set_glyph_class (hb_face_t *face,
- hb_codepoint_t glyph,
- hb_ot_layout_glyph_class_t klass)
-{
- if (HB_OBJECT_IS_INERT (face))
- return;
-
- /* TODO optimize this? similar to old harfbuzz code for example */
-
- hb_ot_layout_t *layout = &face->ot_layout;
- hb_ot_layout_class_t gdef_klass;
- int len = layout->new_gdef.len;
-
- if (HB_UNLIKELY (glyph > 65535))
- return;
-
- /* XXX this is not threadsafe */
- 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 (HB_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;
-}
-
-HB_INTERNAL void
-_hb_ot_layout_set_glyph_property (hb_face_t *face,
- hb_codepoint_t glyph,
- unsigned int property)
-{ _hb_ot_layout_set_glyph_class (face, glyph, (hb_ot_layout_glyph_class_t) (property & 0xff)); }
-
-
-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) (_hb_ot_layout_get_glyph_property (face, glyph) & 0xff);
-}
-
-void
-hb_ot_layout_set_glyph_class (hb_face_t *face,
- hb_codepoint_t glyph,
- hb_ot_layout_glyph_class_t klass)
-{
- _hb_ot_layout_set_glyph_class (face, glyph, klass);
-}
-
-void
-hb_ot_layout_build_glyph_classes (hb_face_t *face,
- uint16_t num_total_glyphs,
- hb_codepoint_t *glyphs,
- unsigned char *klasses,
- uint16_t count)
-{
- if (HB_OBJECT_IS_INERT (face))
- return;
-
- hb_ot_layout_t *layout = &face->ot_layout;
-
- if (HB_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 (face, glyphs[i], (hb_ot_layout_glyph_class_t) klasses[i]);
-}
-
-hb_bool_t
+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, point_count, point_array);
+ return _get_gdef (face).get_attach_points (glyph, start_offset, point_count, point_array);
}
-hb_bool_t
-hb_ot_layout_get_lig_carets (hb_face_t *face,
- hb_font_t *font,
- hb_codepoint_t glyph,
- unsigned int *caret_count /* IN/OUT */,
- int *caret_array /* OUT */)
+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 */)
{
- hb_ot_layout_context_t context;
- context.font = font;
- context.face = face;
- return _get_gdef (face).get_lig_carets (&context, glyph, caret_count, caret_array);
+ 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);
}
/*
unsigned int
-hb_ot_layout_table_get_script_count (hb_face_t *face,
- hb_tag_t table_tag)
-{
- const GSUBGPOS &g = get_gsubgpos_table (face, table_tag);
-
- return g.get_script_count ();
-}
-
-hb_tag_t
-hb_ot_layout_table_get_script_tag (hb_face_t *face,
- hb_tag_t table_tag,
- 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 (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_tag_t script_tag,
unsigned int *script_index)
{
- ASSERT_STATIC (NO_INDEX == HB_OT_LAYOUT_NO_SCRIPT_INDEX);
+ 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_face_t *face,
- hb_tag_t table_tag)
-{
- const GSUBGPOS &g = get_gsubgpos_table (face, table_tag);
-
- return g.get_feature_count ();
-}
-
-hb_tag_t
-hb_ot_layout_table_get_feature_tag (hb_face_t *face,
- hb_tag_t table_tag,
- 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)
{
+ 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_face_t *face,
- hb_tag_t table_tag,
- 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 (face, table_tag);
+ /* 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_face_t *face,
- hb_tag_t table_tag)
+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 (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_face_t *face,
- hb_tag_t table_tag,
- unsigned int script_index)
-{
- const Script &s = get_gsubgpos_table (face, table_tag).get_script (script_index);
-
- return s.get_lang_sys_count ();
-}
-
-hb_tag_t
-hb_ot_layout_script_get_language_tag (hb_face_t *face,
- hb_tag_t table_tag,
- 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 (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_tag_t language_tag,
unsigned int *language_index)
{
- ASSERT_STATIC (NO_INDEX == HB_OT_LAYOUT_DEFAULT_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);
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;
}
unsigned int
-hb_ot_layout_language_get_feature_count (hb_face_t *face,
- hb_tag_t table_tag,
- 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 (face, table_tag).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_face_t *face,
- hb_tag_t table_tag,
- 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 (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_face_t *face,
- hb_tag_t table_tag,
- unsigned int script_index,
- unsigned int language_index,
- unsigned int num_feature)
-{
- const GSUBGPOS &g = get_gsubgpos_table (face, table_tag);
- 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_tag_t feature_tag,
unsigned int *feature_index)
{
- ASSERT_STATIC (NO_INDEX == HB_OT_LAYOUT_NO_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
-hb_ot_layout_feature_get_lookup_count (hb_face_t *face,
- hb_tag_t table_tag,
- 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 (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_face_t *face,
- hb_tag_t table_tag,
- unsigned int feature_index,
- unsigned int num_lookup)
-{
- const GSUBGPOS &g = get_gsubgpos_table (face, table_tag);
- 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_face_t *face,
- hb_buffer_t *buffer,
- unsigned int lookup_index,
- hb_ot_layout_feature_mask_t mask)
+hb_ot_layout_substitute_lookup (hb_face_t *face,
+ hb_buffer_t *buffer,
+ unsigned int lookup_index,
+ hb_mask_t mask)
{
- hb_ot_layout_context_t context;
- context.font = NULL;
- context.face = face;
- return _get_gsub (face).substitute_lookup (&context, buffer, lookup_index, mask);
+ hb_ot_layout_context_t c;
+ c.font = NULL;
+ c.face = face;
+ return _get_gsub (face).substitute_lookup (&c, buffer, lookup_index, mask);
}
+
/*
* GPOS
*/
}
hb_bool_t
-hb_ot_layout_position_lookup (hb_face_t *face,
- hb_font_t *font,
- hb_buffer_t *buffer,
- unsigned int lookup_index,
- hb_ot_layout_feature_mask_t mask)
+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);
+}
+
+void
+hb_ot_layout_position_finish (hb_font_t *font HB_UNUSED,
+ hb_face_t *face HB_UNUSED,
+ hb_buffer_t *buffer)
{
- hb_ot_layout_context_t context;
- context.font = font;
- context.face = face;
- return _get_gpos (face).position_lookup (&context, buffer, lookup_index, mask);
+ 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;
+
+ /* TODO: Vertical */
+
+ /* 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;
+ }
+ 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
+ {
+ 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;
+ }
+ }
+
+
+ /* 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