/*
* Copyright © 2009 Red Hat, Inc.
*
* This is part of HarfBuzz, a text shaping library.
*
* Permission is hereby granted, without written agreement and without
* license or royalty fees, to use, copy, modify, and distribute this
* software and its documentation for any purpose, provided that the
* above copyright notice and the following two paragraphs appear in
* all copies of this software.
*
* IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
* ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
* IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
* DAMAGE.
*
* THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
* ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
*
* Red Hat Author(s): Behdad Esfahbod
*/
#ifndef HB_H_IN
#error "Include <hb.h> instead."
#endif
#ifndef HB_FONT_H
#define HB_FONT_H
#include "hb-common.h"
#include "hb-face.h"
HB_BEGIN_DECLS
typedef struct hb_font_t hb_font_t;
/*
* hb_font_funcs_t
*/
typedef struct hb_font_funcs_t hb_font_funcs_t;
HB_EXTERN hb_font_funcs_t *
hb_font_funcs_create (void);
HB_EXTERN hb_font_funcs_t *
hb_font_funcs_get_empty (void);
HB_EXTERN hb_font_funcs_t *
hb_font_funcs_reference (hb_font_funcs_t *ffuncs);
HB_EXTERN void
hb_font_funcs_destroy (hb_font_funcs_t *ffuncs);
HB_EXTERN hb_bool_t
hb_font_funcs_set_user_data (hb_font_funcs_t *ffuncs,
hb_user_data_key_t *key,
void * data,
hb_destroy_func_t destroy,
hb_bool_t replace);
HB_EXTERN void *
hb_font_funcs_get_user_data (hb_font_funcs_t *ffuncs,
hb_user_data_key_t *key);
HB_EXTERN void
hb_font_funcs_make_immutable (hb_font_funcs_t *ffuncs);
HB_EXTERN hb_bool_t
hb_font_funcs_is_immutable (hb_font_funcs_t *ffuncs);
/* font and glyph extents */
/* Note that typically ascender is positive and descender negative in coordinate systems that grow up. */
typedef struct hb_font_extents_t
{
hb_position_t ascender; /* typographic ascender. */
hb_position_t descender; /* typographic descender. */
hb_position_t line_gap; /* suggested line spacing gap. */
/*< private >*/
hb_position_t reserved9;
hb_position_t reserved8;
hb_position_t reserved7;
hb_position_t reserved6;
hb_position_t reserved5;
hb_position_t reserved4;
hb_position_t reserved3;
hb_position_t reserved2;
hb_position_t reserved1;
} hb_font_extents_t;
/* Note that height is negative in coordinate systems that grow up. */
typedef struct hb_glyph_extents_t
{
hb_position_t x_bearing; /* left side of glyph from origin. */
hb_position_t y_bearing; /* top side of glyph from origin. */
hb_position_t width; /* distance from left to right side. */
hb_position_t height; /* distance from top to bottom side. */
} hb_glyph_extents_t;
/* func types */
typedef hb_bool_t (*hb_font_get_font_extents_func_t) (hb_font_t *font, void *font_data,
hb_font_extents_t *metrics,
void *user_data);
typedef hb_font_get_font_extents_func_t hb_font_get_font_h_extents_func_t;
typedef hb_font_get_font_extents_func_t hb_font_get_font_v_extents_func_t;
typedef hb_bool_t (*hb_font_get_nominal_glyph_func_t) (hb_font_t *font, void *font_data,
hb_codepoint_t unicode,
hb_codepoint_t *glyph,
void *user_data);
typedef hb_bool_t (*hb_font_get_variation_glyph_func_t) (hb_font_t *font, void *font_data,
hb_codepoint_t unicode, hb_codepoint_t variation_selector,
hb_codepoint_t *glyph,
void *user_data);
typedef hb_position_t (*hb_font_get_glyph_advance_func_t) (hb_font_t *font, void *font_data,
hb_codepoint_t glyph,
void *user_data);
typedef hb_font_get_glyph_advance_func_t hb_font_get_glyph_h_advance_func_t;
typedef hb_font_get_glyph_advance_func_t hb_font_get_glyph_v_advance_func_t;
typedef hb_bool_t (*hb_font_get_glyph_origin_func_t) (hb_font_t *font, void *font_data,
hb_codepoint_t glyph,
hb_position_t *x, hb_position_t *y,
void *user_data);
typedef hb_font_get_glyph_origin_func_t hb_font_get_glyph_h_origin_func_t;
typedef hb_font_get_glyph_origin_func_t hb_font_get_glyph_v_origin_func_t;
typedef hb_position_t (*hb_font_get_glyph_kerning_func_t) (hb_font_t *font, void *font_data,
hb_codepoint_t first_glyph, hb_codepoint_t second_glyph,
void *user_data);
typedef hb_font_get_glyph_kerning_func_t hb_font_get_glyph_h_kerning_func_t;
typedef hb_font_get_glyph_kerning_func_t hb_font_get_glyph_v_kerning_func_t;
typedef hb_bool_t (*hb_font_get_glyph_extents_func_t) (hb_font_t *font, void *font_data,
hb_codepoint_t glyph,
hb_glyph_extents_t *extents,
void *user_data);
typedef hb_bool_t (*hb_font_get_glyph_contour_point_func_t) (hb_font_t *font, void *font_data,
hb_codepoint_t glyph, unsigned int point_index,
hb_position_t *x, hb_position_t *y,
void *user_data);
typedef hb_bool_t (*hb_font_get_glyph_name_func_t) (hb_font_t *font, void *font_data,
hb_codepoint_t glyph,
char *name, unsigned int size,
void *user_data);
typedef hb_bool_t (*hb_font_get_glyph_from_name_func_t) (hb_font_t *font, void *font_data,
const char *name, int len, /* -1 means nul-terminated */
hb_codepoint_t *glyph,
void *user_data);
/* func setters */
/**
* hb_font_funcs_set_font_h_extents_func:
* @ffuncs: font functions.
* @func: (closure user_data) (destroy destroy) (scope notified):
* @user_data:
* @destroy:
*
*
*
* Since: 1.1.2
**/
HB_EXTERN void
hb_font_funcs_set_font_h_extents_func (hb_font_funcs_t *ffuncs,
hb_font_get_font_h_extents_func_t func,
void *user_data, hb_destroy_func_t destroy);
/**
* hb_font_funcs_set_font_v_extents_func:
* @ffuncs: font functions.
* @func: (closure user_data) (destroy destroy) (scope notified):
* @user_data:
* @destroy:
*
*
*
* Since: 1.1.2
**/
HB_EXTERN void
hb_font_funcs_set_font_v_extents_func (hb_font_funcs_t *ffuncs,
hb_font_get_font_v_extents_func_t func,
void *user_data, hb_destroy_func_t destroy);
/**
* hb_font_funcs_set_nominal_glyph_func:
* @ffuncs: font functions.
* @func: (closure user_data) (destroy destroy) (scope notified):
* @user_data:
* @destroy:
*
*
*
* Since: 1.2.3
**/
HB_EXTERN void
hb_font_funcs_set_nominal_glyph_func (hb_font_funcs_t *ffuncs,
hb_font_get_nominal_glyph_func_t func,
void *user_data, hb_destroy_func_t destroy);
/**
* hb_font_funcs_set_variation_glyph_func:
* @ffuncs: font functions.
* @func: (closure user_data) (destroy destroy) (scope notified):
* @user_data:
* @destroy:
*
*
*
* Since: 1.2.3
**/
HB_EXTERN void
hb_font_funcs_set_variation_glyph_func (hb_font_funcs_t *ffuncs,
hb_font_get_variation_glyph_func_t func,
void *user_data, hb_destroy_func_t destroy);
/**
* hb_font_funcs_set_glyph_h_advance_func:
* @ffuncs: font functions.
* @func: (closure user_data) (destroy destroy) (scope notified):
* @user_data:
* @destroy:
*
*
*
* Since: 0.9.2
**/
HB_EXTERN void
hb_font_funcs_set_glyph_h_advance_func (hb_font_funcs_t *ffuncs,
hb_font_get_glyph_h_advance_func_t func,
void *user_data, hb_destroy_func_t destroy);
/**
* hb_font_funcs_set_glyph_v_advance_func:
* @ffuncs: font functions.
* @func: (closure user_data) (destroy destroy) (scope notified):
* @user_data:
* @destroy:
*
*
*
* Since: 0.9.2
**/
HB_EXTERN void
hb_font_funcs_set_glyph_v_advance_func (hb_font_funcs_t *ffuncs,
hb_font_get_glyph_v_advance_func_t func,
void *user_data, hb_destroy_func_t destroy);
/**
* hb_font_funcs_set_glyph_h_origin_func:
* @ffuncs: font functions.
* @func: (closure user_data) (destroy destroy) (scope notified):
* @user_data:
* @destroy:
*
*
*
* Since: 0.9.2
**/
HB_EXTERN void
hb_font_funcs_set_glyph_h_origin_func (hb_font_funcs_t *ffuncs,
hb_font_get_glyph_h_origin_func_t func,
void *user_data, hb_destroy_func_t destroy);
/**
* hb_font_funcs_set_glyph_v_origin_func:
* @ffuncs: font functions.
* @func: (closure user_data) (destroy destroy) (scope notified):
* @user_data:
* @destroy:
*
*
*
* Since: 0.9.2
**/
HB_EXTERN void
hb_font_funcs_set_glyph_v_origin_func (hb_font_funcs_t *ffuncs,
hb_font_get_glyph_v_origin_func_t func,
void *user_data, hb_destroy_func_t destroy);
/**
* hb_font_funcs_set_glyph_h_kerning_func:
* @ffuncs: font functions.
* @func: (closure user_data) (destroy destroy) (scope notified):
* @user_data:
* @destroy:
*
*
*
* Since: 0.9.2
**/
HB_EXTERN void
hb_font_funcs_set_glyph_h_kerning_func (hb_font_funcs_t *ffuncs,
hb_font_get_glyph_h_kerning_func_t func,
void *user_data, hb_destroy_func_t destroy);
/**
* hb_font_funcs_set_glyph_v_kerning_func:
* @ffuncs: font functions.
* @func: (closure user_data) (destroy destroy) (scope notified):
* @user_data:
* @destroy:
*
*
*
* Since: 0.9.2
**/
HB_EXTERN void
hb_font_funcs_set_glyph_v_kerning_func (hb_font_funcs_t *ffuncs,
hb_font_get_glyph_v_kerning_func_t func,
void *user_data, hb_destroy_func_t destroy);
/**
* hb_font_funcs_set_glyph_extents_func:
* @ffuncs: font functions.
* @func: (closure user_data) (destroy destroy) (scope notified):
* @user_data:
* @destroy:
*
*
*
* Since: 0.9.2
**/
HB_EXTERN void
hb_font_funcs_set_glyph_extents_func (hb_font_funcs_t *ffuncs,
hb_font_get_glyph_extents_func_t func,
void *user_data, hb_destroy_func_t destroy);
/**
* hb_font_funcs_set_glyph_contour_point_func:
* @ffuncs: font functions.
* @func: (closure user_data) (destroy destroy) (scope notified):
* @user_data:
* @destroy:
*
*
*
* Since: 0.9.2
**/
HB_EXTERN void
hb_font_funcs_set_glyph_contour_point_func (hb_font_funcs_t *ffuncs,
hb_font_get_glyph_contour_point_func_t func,
void *user_data, hb_destroy_func_t destroy);
/**
* hb_font_funcs_set_glyph_name_func:
* @ffuncs: font functions.
* @func: (closure user_data) (destroy destroy) (scope notified):
* @user_data:
* @destroy:
*
*
*
* Since: 0.9.2
**/
HB_EXTERN void
hb_font_funcs_set_glyph_name_func (hb_font_funcs_t *ffuncs,
hb_font_get_glyph_name_func_t func,
void *user_data, hb_destroy_func_t destroy);
/**
* hb_font_funcs_set_glyph_from_name_func:
* @ffuncs: font functions.
* @func: (closure user_data) (destroy destroy) (scope notified):
* @user_data:
* @destroy:
*
*
*
* Since: 0.9.2
**/
HB_EXTERN void
hb_font_funcs_set_glyph_from_name_func (hb_font_funcs_t *ffuncs,
hb_font_get_glyph_from_name_func_t func,
void *user_data, hb_destroy_func_t destroy);
/* func dispatch */
HB_EXTERN hb_bool_t
hb_font_get_h_extents (hb_font_t *font,
hb_font_extents_t *extents);
HB_EXTERN hb_bool_t
hb_font_get_v_extents (hb_font_t *font,
hb_font_extents_t *extents);
HB_EXTERN hb_bool_t
hb_font_get_nominal_glyph (hb_font_t *font,
hb_codepoint_t unicode,
hb_codepoint_t *glyph);
HB_EXTERN hb_bool_t
hb_font_get_variation_glyph (hb_font_t *font,
hb_codepoint_t unicode, hb_codepoint_t variation_selector,
hb_codepoint_t *glyph);
HB_EXTERN hb_position_t
hb_font_get_glyph_h_advance (hb_font_t *font,
hb_codepoint_t glyph);
HB_EXTERN hb_position_t
hb_font_get_glyph_v_advance (hb_font_t *font,
hb_codepoint_t glyph);
HB_EXTERN hb_bool_t
hb_font_get_glyph_h_origin (hb_font_t *font,
hb_codepoint_t glyph,
hb_position_t *x, hb_position_t *y);
HB_EXTERN hb_bool_t
hb_font_get_glyph_v_origin (hb_font_t *font,
hb_codepoint_t glyph,
hb_position_t *x, hb_position_t *y);
HB_EXTERN hb_position_t
hb_font_get_glyph_h_kerning (hb_font_t *font,
hb_codepoint_t left_glyph, hb_codepoint_t right_glyph);
HB_EXTERN hb_position_t
hb_font_get_glyph_v_kerning (hb_font_t *font,
hb_codepoint_t top_glyph, hb_codepoint_t bottom_glyph);
HB_EXTERN hb_bool_t
hb_font_get_glyph_extents (hb_font_t *font,
hb_codepoint_t glyph,
hb_glyph_extents_t *extents);
HB_EXTERN hb_bool_t
hb_font_get_glyph_contour_point (hb_font_t *font,
hb_codepoint_t glyph, unsigned int point_index,
hb_position_t *x, hb_position_t *y);
HB_EXTERN hb_bool_t
hb_font_get_glyph_name (hb_font_t *font,
hb_codepoint_t glyph,
char *name, unsigned int size);
HB_EXTERN hb_bool_t
hb_font_get_glyph_from_name (hb_font_t *font,
const char *name, int len, /* -1 means nul-terminated */
hb_codepoint_t *glyph);
/* high-level funcs, with fallback */
/* Calls either hb_font_get_nominal_glyph() if variation_selector is 0,
* otherwise callse hb_font_get_variation_glyph(). */
HB_EXTERN hb_bool_t
hb_font_get_glyph (hb_font_t *font,
hb_codepoint_t unicode, hb_codepoint_t variation_selector,
hb_codepoint_t *glyph);
HB_EXTERN void
hb_font_get_extents_for_direction (hb_font_t *font,
hb_direction_t direction,
hb_font_extents_t *extents);
HB_EXTERN void
hb_font_get_glyph_advance_for_direction (hb_font_t *font,
hb_codepoint_t glyph,
hb_direction_t direction,
hb_position_t *x, hb_position_t *y);
HB_EXTERN void
hb_font_get_glyph_origin_for_direction (hb_font_t *font,
hb_codepoint_t glyph,
hb_direction_t direction,
hb_position_t *x, hb_position_t *y);
HB_EXTERN void
hb_font_add_glyph_origin_for_direction (hb_font_t *font,
hb_codepoint_t glyph,
hb_direction_t direction,
hb_position_t *x, hb_position_t *y);
HB_EXTERN void
hb_font_subtract_glyph_origin_for_direction (hb_font_t *font,
hb_codepoint_t glyph,
hb_direction_t direction,
hb_position_t *x, hb_position_t *y);
HB_EXTERN void
hb_font_get_glyph_kerning_for_direction (hb_font_t *font,
hb_codepoint_t first_glyph, hb_codepoint_t second_glyph,
hb_direction_t direction,
hb_position_t *x, hb_position_t *y);
HB_EXTERN hb_bool_t
hb_font_get_glyph_extents_for_origin (hb_font_t *font,
hb_codepoint_t glyph,
hb_direction_t direction,
hb_glyph_extents_t *extents);
HB_EXTERN hb_bool_t
hb_font_get_glyph_contour_point_for_origin (hb_font_t *font,
hb_codepoint_t glyph, unsigned int point_index,
hb_direction_t direction,
hb_position_t *x, hb_position_t *y);
/* Generates gidDDD if glyph has no name. */
HB_EXTERN void
hb_font_glyph_to_string (hb_font_t *font,
hb_codepoint_t glyph,
char *s, unsigned int size);
/* Parses gidDDD and uniUUUU strings automatically. */
HB_EXTERN hb_bool_t
hb_font_glyph_from_string (hb_font_t *font,
const char *s, int len, /* -1 means nul-terminated */
hb_codepoint_t *glyph);
/*
* hb_font_t
*/
/* Fonts are very light-weight objects */
HB_EXTERN hb_font_t *
hb_font_create (hb_face_t *face);
HB_EXTERN hb_font_t *
hb_font_create_sub_font (hb_font_t *parent);
HB_EXTERN hb_font_t *
hb_font_get_empty (void);
HB_EXTERN hb_font_t *
hb_font_reference (hb_font_t *font);
HB_EXTERN void
hb_font_destroy (hb_font_t *font);
HB_EXTERN hb_bool_t
hb_font_set_user_data (hb_font_t *font,
hb_user_data_key_t *key,
void * data,
hb_destroy_func_t destroy,
hb_bool_t replace);
HB_EXTERN void *
hb_font_get_user_data (hb_font_t *font,
hb_user_data_key_t *key);
HB_EXTERN void
hb_font_make_immutable (hb_font_t *font);
HB_EXTERN hb_bool_t
hb_font_is_immutable (hb_font_t *font);
HB_EXTERN void
hb_font_set_parent (hb_font_t *font,
hb_font_t *parent);
HB_EXTERN hb_font_t *
hb_font_get_parent (hb_font_t *font);
HB_EXTERN hb_face_t *
hb_font_get_face (hb_font_t *font);
HB_EXTERN void
hb_font_set_funcs (hb_font_t *font,
hb_font_funcs_t *klass,
void *font_data,
hb_destroy_func_t destroy);
/* Be *very* careful with this function! */
HB_EXTERN void
hb_font_set_funcs_data (hb_font_t *font,
void *font_data,
hb_destroy_func_t destroy);
HB_EXTERN void
hb_font_set_scale (hb_font_t *font,
int x_scale,
int y_scale);
HB_EXTERN void
hb_font_get_scale (hb_font_t *font,
int *x_scale,
int *y_scale);
/*
* A zero value means "no hinting in that direction"
*/
HB_EXTERN void
hb_font_set_ppem (hb_font_t *font,
unsigned int x_ppem,
unsigned int y_ppem);
HB_EXTERN void
hb_font_get_ppem (hb_font_t *font,
unsigned int *x_ppem,
unsigned int *y_ppem);
HB_END_DECLS
#endif /* HB_FONT_H */