PangoOTTag

typedef guint32  PangoOTTag;

The PangoOTTag typedef is used to represent TrueType and OpenType four letter tags inside Pango. Use the FT_MAKE_TAG() macro defined in the FreeType2 header freetype/freetype.h to create PangoOTTags manually.

struct PangoOTInfo

struct PangoOTInfo;

The PangoOTInfo struct contains the various tables associated with an OpenType font. It contains only private fields and should only be accessed via the pango_ot_info_* functions which are documented below. To obtain a PangoOTInfo, use pango_ot_info_new().

struct PangoOTBuffer

struct PangoOTBuffer;

struct PangoOTGlyph

struct PangoOTGlyph {

  guint    glyph;
  guint    properties;
  guint    cluster;
  gushort  component;
  gushort  ligID;
};

struct PangoOTRuleset

struct PangoOTRuleset;

The PangoOTRuleSet structure holds a set of features selected from the tables in an OpenType font. (A feature is an operation such as adjusting glyph positioning that should be applied to a text feature such as a certain type of accent.) A PangoOTRuleSet is created with pango_ot_ruleset_new(), features are addded to it with pango_ot_ruleset_add_feature(), then it is applied to a PangoGlyphString with pango_ot_ruleset_shape().

enum PangoOTTableType

typedef enum 
{
  PANGO_OT_TABLE_GSUB,
  PANGO_OT_TABLE_GPOS
} PangoOTTableType;

The PangoOTTableType enumeration values are used to identify the various OpenType tables in the pango_ot_info_* functions.

pango_ot_info_get ()

PangoOTInfo* pango_ot_info_get              (FT_Face face);

Returns the PangoOTInfo structure for the given FreeType font.

Since 1.2

pango_ot_info_find_script ()

gboolean    pango_ot_info_find_script       (PangoOTInfo *info,
                                             PangoOTTableType table_type,
                                             PangoOTTag script_tag,
                                             guint *script_index);

Finds the index of a script.

pango_ot_info_find_language ()

gboolean    pango_ot_info_find_language     (PangoOTInfo *info,
                                             PangoOTTableType table_type,
                                             guint script_index,
                                             PangoOTTag language_tag,
                                             guint *language_index,
                                             guint *required_feature_index);

Finds the index of a language and its required feature index.

pango_ot_info_find_feature ()

gboolean    pango_ot_info_find_feature      (PangoOTInfo *info,
                                             PangoOTTableType table_type,
                                             PangoOTTag feature_tag,
                                             guint script_index,
                                             guint language_index,
                                             guint *feature_index);

Finds the index of a feature.

pango_ot_info_list_scripts ()

PangoOTTag* pango_ot_info_list_scripts      (PangoOTInfo *info,
                                             PangoOTTableType table_type);

Obtains the list of available scripts.

pango_ot_info_list_languages ()

PangoOTTag* pango_ot_info_list_languages    (PangoOTInfo *info,
                                             PangoOTTableType table_type,
                                             guint script_index,
                                             PangoOTTag language_tag);

Obtains the list of available languages for a given script.

pango_ot_info_list_features ()

PangoOTTag* pango_ot_info_list_features     (PangoOTInfo *info,
                                             PangoOTTableType table_type,
                                             PangoOTTag tag,
                                             guint script_index,
                                             guint language_index);

Obtains the list of features for the given language of the given script.

pango_ot_buffer_new ()

PangoOTBuffer* pango_ot_buffer_new          (PangoFcFont *font);

pango_ot_buffer_destroy ()

void        pango_ot_buffer_destroy         (PangoOTBuffer *buffer);

pango_ot_buffer_clear ()

void        pango_ot_buffer_clear           (PangoOTBuffer *buffer);

pango_ot_buffer_add_glyph ()

void        pango_ot_buffer_add_glyph       (PangoOTBuffer *buffer,
                                             guint glyph_index,
                                             guint properties,
                                             guint cluster);

pango_ot_buffer_set_rtl ()

void        pango_ot_buffer_set_rtl         (PangoOTBuffer *buffer,
                                             gboolean rtl);

pango_ot_buffer_set_zero_width_marks ()

void        pango_ot_buffer_set_zero_width_marks
                                            (PangoOTBuffer *buffer,
                                             gboolean zero_width_marks);

Sets whether characters with a mark class should be forced to zero width. This setting is needed for proper positioning of Arabic accents, but will produce incorrect results with standard OpenType indic fonts.

pango_ot_buffer_get_glyphs ()

void        pango_ot_buffer_get_glyphs      (PangoOTBuffer *buffer,
                                             PangoOTGlyph **glyphs,
                                             int *n_glyphs);

pango_ot_buffer_output ()

void        pango_ot_buffer_output          (PangoOTBuffer *buffer,
                                             PangoGlyphString *glyphs);

pango_ot_ruleset_new ()

PangoOTRuleset* pango_ot_ruleset_new        (PangoOTInfo *info);

Creates a new PangoOTRuleset for the given OpenType info.

pango_ot_ruleset_add_feature ()

void        pango_ot_ruleset_add_feature    (PangoOTRuleset *ruleset,
                                             PangoOTTableType table_type,
                                             guint feature_index,
                                             gulong property_bit);

Adds a feature to the ruleset. See pango_ot_ruleset_shape() for an explanation of property_bit.

pango_ot_ruleset_substitute ()

void        pango_ot_ruleset_substitute     (PangoOTRuleset *ruleset,
                                             PangoOTBuffer *buffer);

pango_ot_ruleset_position ()

void        pango_ot_ruleset_position       (PangoOTRuleset *ruleset,
                                             PangoOTBuffer *buffer);