PangoFcFontMap

typedef struct _PangoFcFontMap PangoFcFontMap;

PangoFcFontMap is a base class for font map implementations using the Fontconfig and FreeType libraries. To create a new backend using Fontconfig and FreeType, you derive from this class and implement a new_font() virtual function that creates an instance deriving from PangoFcFont.

PangoFcFontMapClass

typedef struct {
  /* Deprecated in favor of context_substitute */
  void         (*default_substitute) (PangoFcFontMap   *fontmap,
				      FcPattern        *pattern);
  /* Deprecated in favor of create_font */
  PangoFcFont  *(*new_font)          (PangoFcFontMap  *fontmap,
				      FcPattern       *pattern);

  double       (*get_resolution)     (PangoFcFontMap             *fcfontmap,
				      PangoContext               *context);

  gconstpointer (*context_key_get)   (PangoFcFontMap             *fcfontmap,
				      PangoContext               *context);
  gpointer     (*context_key_copy)   (PangoFcFontMap             *fcfontmap,
				      gconstpointer               key);
  void         (*context_key_free)   (PangoFcFontMap             *fcfontmap,
				      gpointer                    key);
  guint32      (*context_key_hash)   (PangoFcFontMap             *fcfontmap,
				      gconstpointer               key);
  gboolean     (*context_key_equal)  (PangoFcFontMap             *fcfontmap,
				      gconstpointer               key_a,
				      gconstpointer               key_b);

  void         (*context_substitute) (PangoFcFontMap             *fontmap,
				      PangoContext               *context,
				      FcPattern                  *pattern);
  PangoFcFont  *(*create_font)       (PangoFcFontMap             *fontmap,
				      PangoContext               *context,
				      const PangoFontDescription *desc,
				      FcPattern                  *pattern);
} PangoFcFontMapClass;

Class structure for PangoFcFontMap.

pango_fc_font_map_create_context ()

PangoContext*       pango_fc_font_map_create_context    (PangoFcFontMap *fcfontmap);

Creates a new context for this fontmap. This function is intended only for backend implementations deriving from PangoFcFontmap; it is possible that a backend will store additional information needed for correct operation on the PangoContext after calling this function.

Since 1.4

PangoFcDecoderFindFunc ()

PangoFcDecoder*     (*PangoFcDecoderFindFunc)           (FcPattern *pattern,
                                                         gpointer user_data);

Callback function passed to pango_fc_font_map_add_decoder_find_func().

pango_fc_font_map_add_decoder_find_func ()

void                pango_fc_font_map_add_decoder_find_func
                                                        (PangoFcFontMap *fcfontmap,
                                                         PangoFcDecoderFindFunc findfunc,
                                                         gpointer user_data,
                                                         GDestroyNotify dnotify);

This function saves a callback method in the PangoFcFontMap that will be called whenever new fonts are created. If the function returns a PangoFcDecoder, that decoder will be used to determine both coverage via a FcCharSet and a one-to-one mapping of characters to glyphs. This will allow applications to have application-specific encodings for various fonts.

Since 1.6.

pango_fc_font_map_cache_clear ()

void                pango_fc_font_map_cache_clear       (PangoFcFontMap *fcfontmap);

Clear all cached information and fontsets for this font map; this should be called whenever there is a change in the output of the default_substitute() virtual function.

This function is intended to be used only by backend implementations deriving from PangoFcFontmap.

Since 1.4

pango_fc_font_map_shutdown ()

void                pango_fc_font_map_shutdown          (PangoFcFontMap *fcfontmap);

Clears all cached information for the fontmap and marks all fonts open for the fontmap as dead. (See the shutdown() virtual function of PangoFcFont.) This function might be used by a backend when the underlying windowing system for the font map exits. This function is only intended to be called from only for backend implementations deriving from PangoFcFontmap.

Since 1.4

pango_fc_font_description_from_pattern ()

PangoFontDescription* pango_fc_font_description_from_pattern
                                                        (FcPattern *pattern,
                                                         gboolean include_size);

Creates a PangoFontDescription that matches the specified Fontconfig pattern as closely as possible. Many possible Fontconfig pattern values, such as FC_RASTERIZER or FC_DPI, don't make sense in the context of PangoFontDescription, so will be ignored.

Since 1.4

PANGO_FC_GRAVITY

#define PANGO_FC_GRAVITY "pangogravity"

String representing a fontconfig property name that Pango sets on any fontconfig pattern it passes to fontconfig if a PangoGravity other than PangoGravitySouth is desired.

The property will have a PangoGravity value as a string, like "east".

Since 1.20

PANGO_FC_VERSION

#define PANGO_FC_VERSION "pangoversion"

String representing a fontconfig property name that Pango sets on any fontconfig pattern it passes to fontconfig.

The property will have an integer value equal to what pango_version() returns.

Since 1.20