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Diffstat (limited to 'trunk/pango/pango-ot.h')
| -rw-r--r-- | trunk/pango/pango-ot.h | 185 |
1 files changed, 185 insertions, 0 deletions
diff --git a/trunk/pango/pango-ot.h b/trunk/pango/pango-ot.h new file mode 100644 index 00000000..1b3b8b7e --- /dev/null +++ b/trunk/pango/pango-ot.h @@ -0,0 +1,185 @@ +/* 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; +}; + + +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__ */ |