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pango-ot.h
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pango-ot.h
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/* Pango
* pango-ot.h:
*
* Copyright (C) 2000,2007 Red Hat Software
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __PANGO_OT_H__
#define __PANGO_OT_H__
#include <pango/pangofc-font.h>
#include <pango/pango-glyph.h>
#include <pango/pango-font.h>
#include <pango/pango-script.h>
#include <pango/pango-language.h>
G_BEGIN_DECLS
#ifdef PANGO_ENABLE_ENGINE
typedef guint32 PangoOTTag;
#define PANGO_OT_TAG_MAKE(c1,c2,c3,c4) ((PangoOTTag) FT_MAKE_TAG (c1, c2, c3, c4))
#define PANGO_OT_TAG_MAKE_FROM_STRING(s) (PANGO_OT_TAG_MAKE(((const char *) s)[0], \
((const char *) s)[1], \
((const char *) s)[2], \
((const char *) s)[3]))
typedef struct _PangoOTInfo PangoOTInfo;
typedef struct _PangoOTBuffer PangoOTBuffer;
typedef struct _PangoOTGlyph PangoOTGlyph;
typedef struct _PangoOTRuleset PangoOTRuleset;
typedef struct _PangoOTFeatureMap PangoOTFeatureMap;
typedef struct _PangoOTRulesetDescription PangoOTRulesetDescription;
typedef enum
{
PANGO_OT_TABLE_GSUB,
PANGO_OT_TABLE_GPOS
} PangoOTTableType;
#define PANGO_OT_ALL_GLYPHS ((guint) 0xFFFF)
#define PANGO_OT_NO_FEATURE ((guint) 0xFFFF)
#define PANGO_OT_NO_SCRIPT ((guint) 0xFFFF)
#define PANGO_OT_DEFAULT_LANGUAGE ((guint) 0xFFFF)
#define PANGO_OT_TAG_DEFAULT_SCRIPT PANGO_OT_TAG_MAKE ('D', 'F', 'L', 'T')
#define PANGO_OT_TAG_DEFAULT_LANGUAGE PANGO_OT_TAG_MAKE ('d', 'f', 'l', 't')
/* Note that this must match HB_GlyphItem */
struct _PangoOTGlyph
{
guint glyph;
guint properties;
guint cluster;
gushort component;
gushort ligID;
gushort property_cache; /* Internal */
};
struct _PangoOTFeatureMap
{
char feature_name[5];
gulong property_bit;
};
struct _PangoOTRulesetDescription {
PangoScript script;
PangoLanguage *language;
const PangoOTFeatureMap *static_gsub_features;
guint n_static_gsub_features;
const PangoOTFeatureMap *static_gpos_features;
guint n_static_gpos_features;
const PangoOTFeatureMap *other_features;
guint n_other_features;
};
#define PANGO_TYPE_OT_INFO (pango_ot_info_get_type ())
#define PANGO_OT_INFO(object) (G_TYPE_CHECK_INSTANCE_CAST ((object), PANGO_TYPE_OT_INFO, PangoOTInfo))
#define PANGO_IS_OT_INFO(object) (G_TYPE_CHECK_INSTANCE_TYPE ((object), PANGO_TYPE_OT_INFO))
GType pango_ot_info_get_type (void) G_GNUC_CONST;
#define PANGO_TYPE_OT_RULESET (pango_ot_ruleset_get_type ())
#define PANGO_OT_RULESET(object) (G_TYPE_CHECK_INSTANCE_CAST ((object), PANGO_TYPE_OT_RULESET, PangoOTRuleset))
#define PANGO_IS_OT_RULESET(object) (G_TYPE_CHECK_INSTANCE_TYPE ((object), PANGO_TYPE_OT_RULESET))
GType pango_ot_ruleset_get_type (void) G_GNUC_CONST;
PangoOTInfo *pango_ot_info_get (FT_Face face);
gboolean pango_ot_info_find_script (PangoOTInfo *info,
PangoOTTableType table_type,
PangoOTTag script_tag,
guint *script_index);
gboolean pango_ot_info_find_language (PangoOTInfo *info,
PangoOTTableType table_type,
guint script_index,
PangoOTTag language_tag,
guint *language_index,
guint *required_feature_index);
gboolean pango_ot_info_find_feature (PangoOTInfo *info,
PangoOTTableType table_type,
PangoOTTag feature_tag,
guint script_index,
guint language_index,
guint *feature_index);
PangoOTTag *pango_ot_info_list_scripts (PangoOTInfo *info,
PangoOTTableType table_type);
PangoOTTag *pango_ot_info_list_languages (PangoOTInfo *info,
PangoOTTableType table_type,
guint script_index,
PangoOTTag language_tag);
PangoOTTag *pango_ot_info_list_features (PangoOTInfo *info,
PangoOTTableType table_type,
PangoOTTag tag,
guint script_index,
guint language_index);
PangoOTBuffer *pango_ot_buffer_new (PangoFcFont *font);
void pango_ot_buffer_destroy (PangoOTBuffer *buffer);
void pango_ot_buffer_clear (PangoOTBuffer *buffer);
void pango_ot_buffer_set_rtl (PangoOTBuffer *buffer,
gboolean rtl);
void pango_ot_buffer_add_glyph (PangoOTBuffer *buffer,
guint glyph,
guint properties,
guint cluster);
void pango_ot_buffer_get_glyphs (const PangoOTBuffer *buffer,
PangoOTGlyph **glyphs,
int *n_glyphs);
void pango_ot_buffer_output (const PangoOTBuffer *buffer,
PangoGlyphString *glyphs);
void pango_ot_buffer_set_zero_width_marks (PangoOTBuffer *buffer,
gboolean zero_width_marks);
const PangoOTRuleset *pango_ot_ruleset_get_for_description (PangoOTInfo *info,
const PangoOTRulesetDescription *desc);
PangoOTRuleset *pango_ot_ruleset_new (PangoOTInfo *info);
PangoOTRuleset *pango_ot_ruleset_new_for (PangoOTInfo *info,
PangoScript script,
PangoLanguage *language);
PangoOTRuleset *pango_ot_ruleset_new_from_description (PangoOTInfo *info,
const PangoOTRulesetDescription *desc);
void pango_ot_ruleset_add_feature (PangoOTRuleset *ruleset,
PangoOTTableType table_type,
guint feature_index,
gulong property_bit);
gboolean pango_ot_ruleset_maybe_add_feature (PangoOTRuleset *ruleset,
PangoOTTableType table_type,
PangoOTTag feature_tag,
gulong property_bit);
guint pango_ot_ruleset_maybe_add_features (PangoOTRuleset *ruleset,
PangoOTTableType table_type,
const PangoOTFeatureMap *features,
guint n_features);
guint pango_ot_ruleset_get_feature_count (const PangoOTRuleset *ruleset,
guint *n_gsub_features,
guint *n_gpos_features);
void pango_ot_ruleset_substitute (const PangoOTRuleset *ruleset,
PangoOTBuffer *buffer);
void pango_ot_ruleset_position (const PangoOTRuleset *ruleset,
PangoOTBuffer *buffer);
PangoScript pango_ot_tag_to_script (PangoOTTag script_tag) G_GNUC_CONST;
PangoOTTag pango_ot_tag_from_script (PangoScript script) G_GNUC_CONST;
PangoLanguage *pango_ot_tag_to_language (PangoOTTag language_tag) G_GNUC_CONST;
PangoOTTag pango_ot_tag_from_language (PangoLanguage *language) G_GNUC_CONST;
guint pango_ot_ruleset_description_hash (const PangoOTRulesetDescription *desc) G_GNUC_PURE;
gboolean pango_ot_ruleset_description_equal (const PangoOTRulesetDescription *desc1,
const PangoOTRulesetDescription *desc2) G_GNUC_PURE;
PangoOTRulesetDescription *pango_ot_ruleset_description_copy (const PangoOTRulesetDescription *desc);
void pango_ot_ruleset_description_free (PangoOTRulesetDescription *desc);
#endif /* PANGO_ENABLE_ENGINE */
G_END_DECLS
#endif /* __PANGO_OT_H__ */