pangofc-fontmap.h

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/* Pango
 * pangofc-fontmap.h: Base fontmap type for fontconfig-based backends
 *
 * Copyright (C) 2003 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_FC_FONT_MAP_H__
#define __PANGO_FC_FONT_MAP_H__
 
#include <pango/pango.h>
#include <fontconfig/fontconfig.h>
#include <pango/pangofc-decoder.h>
#include <pango/pangofc-font.h>
#include <hb.h>
 
G_BEGIN_DECLS
 
 
/*
 * PangoFcFontMap
 */
 
#ifdef __GI_SCANNER__
#define PANGO_FC_TYPE_FONT_MAP              (pango_fc_font_map_get_type ())
#define PANGO_FC_FONT_MAP(object)           (G_TYPE_CHECK_INSTANCE_CAST ((object), PANGO_FC_TYPE_FONT_MAP, PangoFcFontMap))
#define PANGO_FC_IS_FONT_MAP(object)        (G_TYPE_CHECK_INSTANCE_TYPE ((object), PANGO_FC_TYPE_FONT_MAP))
#else
#define PANGO_TYPE_FC_FONT_MAP              (pango_fc_font_map_get_type ())
#define PANGO_FC_FONT_MAP(object)           (G_TYPE_CHECK_INSTANCE_CAST ((object), PANGO_TYPE_FC_FONT_MAP, PangoFcFontMap))
#define PANGO_IS_FC_FONT_MAP(object)        (G_TYPE_CHECK_INSTANCE_TYPE ((object), PANGO_TYPE_FC_FONT_MAP))
#endif
 
typedef struct _PangoFcFontMap        PangoFcFontMap;
typedef struct _PangoFcFontMapClass   PangoFcFontMapClass;
typedef struct _PangoFcFontMapPrivate PangoFcFontMapPrivate;
 
PANGO_AVAILABLE_IN_ALL
GType pango_fc_font_map_get_type (void) G_GNUC_CONST;
 
PANGO_AVAILABLE_IN_1_4
void           pango_fc_font_map_cache_clear    (PangoFcFontMap *fcfontmap);
 
PANGO_AVAILABLE_IN_1_38
void
pango_fc_font_map_config_changed (PangoFcFontMap *fcfontmap);
 
PANGO_AVAILABLE_IN_1_38
void
pango_fc_font_map_set_config (PangoFcFontMap *fcfontmap,
                  FcConfig       *fcconfig);
PANGO_AVAILABLE_IN_1_38
FcConfig *
pango_fc_font_map_get_config (PangoFcFontMap *fcfontmap);
 
/**
 * PangoFcDecoderFindFunc:
 * @pattern: a fully resolved `FcPattern` specifying the font on the system
 * @user_data: user data passed to
 *   [method@PangoFc.FontMap.add_decoder_find_func]
 *
 * Callback function passed to [method@PangoFc.FontMap.add_decoder_find_func].
 *
 * Return value: a new reference to a custom decoder for this pattern,
 *  or %NULL if the default decoder handling should be used.
 **/
typedef PangoFcDecoder * (*PangoFcDecoderFindFunc) (FcPattern *pattern,
                            gpointer   user_data);
 
PANGO_AVAILABLE_IN_1_6
void pango_fc_font_map_add_decoder_find_func (PangoFcFontMap        *fcfontmap,
                          PangoFcDecoderFindFunc findfunc,
                          gpointer               user_data,
                          GDestroyNotify         dnotify);
PANGO_AVAILABLE_IN_1_26
PangoFcDecoder *pango_fc_font_map_find_decoder (PangoFcFontMap *fcfontmap,
                            FcPattern      *pattern);
 
PANGO_AVAILABLE_IN_1_4
PangoFontDescription *pango_fc_font_description_from_pattern (FcPattern *pattern,
                                  gboolean   include_size);
 
#ifndef PANGO_DISABLE_DEPRECATED
PANGO_DEPRECATED_IN_1_22_FOR(pango_font_map_create_context)
PangoContext * pango_fc_font_map_create_context (PangoFcFontMap *fcfontmap);
#endif
PANGO_AVAILABLE_IN_1_4
void           pango_fc_font_map_shutdown       (PangoFcFontMap *fcfontmap);
 
 
PANGO_AVAILABLE_IN_1_44
hb_face_t * pango_fc_font_map_get_hb_face (PangoFcFontMap *fcfontmap,
                                           PangoFcFont    *fcfont);
 
/**
 * PangoFcSubstituteFunc:
 * @pattern: the FcPattern to tweak.
 * @data: user data.
 *
 * Function type for doing final config tweaking on prepared `FcPattern`s.
 */
typedef void (*PangoFcSubstituteFunc) (FcPattern *pattern,
                       gpointer   data);
 
/**
 * pango_fc_font_map_set_default_substitute:
 * @fontmap: a `PangoFcFontMap`
 * @func: function to call to to do final config tweaking on `FcPattern` objects
 * @data: data to pass to @func
 * @notify: function to call when @data is no longer used
 *
 * Sets a function that will be called to do final configuration
 * substitution on a `FcPattern` before it is used to load
 * the font.
 *
 * This function can be used to do things like set
 * hinting and antialiasing options.
 *
 * Since: 1.48
 */
PANGO_AVAILABLE_IN_1_48
void pango_fc_font_map_set_default_substitute (PangoFcFontMap        *fontmap,
                           PangoFcSubstituteFunc func,
                           gpointer              data,
                           GDestroyNotify        notify);
 
/**
 * pango_fc_font_map_substitute_changed:
 * @fontmap: a `PangoFcFontMap`
 *
 * Call this function any time the results of the default
 * substitution function set with
 * [method@PangoFc.FontMap.set_default_substitute] change.
 *
 * That is, if your substitution function will return different
 * results for the same input pattern, you must call this function.
 *
 * Since: 1.48
 */
PANGO_AVAILABLE_IN_1_48
void pango_fc_font_map_substitute_changed (PangoFcFontMap *fontmap);
 
/**
 * PANGO_FC_GRAVITY:
 *
 * Fontconfig property that Pango sets on any
 * fontconfig pattern it passes to fontconfig
 * if a `PangoGravity` other than %PANGO_GRAVITY_SOUTH
 * is desired.
 *
 * The property will have a `PangoGravity` value as a string,
 * like "east". This can be used to write fontconfig configuration
 * rules to choose different fonts for horizontal and vertical
 * writing directions.
 *
 * Since: 1.20
 */
#define PANGO_FC_GRAVITY "pangogravity"
 
/**
 * PANGO_FC_VERSION:
 *
 * Fontconfig property that Pango sets on any
 * fontconfig pattern it passes to fontconfig.
 *
 * The property will have an integer value equal to what
 * [func@Pango.version] returns. This can be used to write
 * fontconfig configuration rules that only affect certain
 * pango versions (or only pango-using applications, or only
 * non-pango-using applications).
 *
 * Since: 1.20
 */
#define PANGO_FC_VERSION "pangoversion"
 
/**
 * PANGO_FC_PRGNAME:
 *
 * Fontconfig property that Pango sets on any
 * fontconfig pattern it passes to fontconfig.
 *
 * The property will have a string equal to what
 * g_get_prgname() returns. This can be used to write
 * fontconfig configuration rules that only affect
 * certain applications.
 *
 * This is equivalent to FC_PRGNAME in versions of
 * fontconfig that have that.
 *
 * Since: 1.24
 */
#define PANGO_FC_PRGNAME "prgname"
 
/**
 * PANGO_FC_FONT_FEATURES:
 *
 * Fontconfig property that Pango reads from font
 * patterns to populate list of OpenType features
 * to be enabled for the font by default.
 *
 * The property will have a number of string elements,
 * each of which is the OpenType feature tag of one feature
 * to enable.
 *
 * This is equivalent to FC_FONT_FEATURES in versions of
 * fontconfig that have that.
 *
 * Since: 1.34
 */
#define PANGO_FC_FONT_FEATURES "fontfeatures"
 
/**
 * PANGO_FC_FONT_VARIATIONS:
 *
 * Fontconfig property that Pango reads from font
 * patterns to populate list of OpenType font variations
 * to be used for a font.
 *
 * The property will have a string elements, each of which
 * a comma-separated list of OpenType axis setting of the
 * form AXIS=VALUE.
 *
 * This is equivalent to FC_FONT_VARIATIONS in versions of
 * fontconfig that have that.
 */
#define PANGO_FC_FONT_VARIATIONS "fontvariations"
 
G_END_DECLS
 
#endif /* __PANGO_FC_FONT_MAP_H__ */