/*
* 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
*/
#if !defined (HB_H_IN) && !defined (HB_NO_SINGLE_HEADER_ERROR)
#error "Include <hb.h> instead."
#endif
#ifndef HB_FONT_H
#define HB_FONT_H
#include "hb-common.h"
#include "hb-face.h"
#include "hb-draw.h"
#include "hb-paint.h"
HB_BEGIN_DECLS
/*
* hb_font_funcs_t
*/
/**
* hb_font_funcs_t :
*
* Data type containing a set of virtual methods used for
* working on # hb_font_t font objects .
*
* HarfBuzz provides a lightweight default function for each of
* the methods in # hb_font_funcs_t . Client programs can implement
* their own replacements for the individual font functions , as
* needed , and replace the default by calling the setter for a
* method .
*
**/
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 (const 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 extents */
/**
* hb_font_extents_t :
* @ ascender : The height of typographic ascenders .
* @ descender : The depth of typographic descenders .
* @ line_gap : The suggested line - spacing gap .
*
* Font - wide extent values , measured in font units .
*
* 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;
hb_position_t descender;
hb_position_t line_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;
/* func types */
/**
* hb_font_get_font_extents_func_t :
* @ font : # hb_font_t to work upon
* @ font_data : @ font user data pointer
* @ extents : ( out ) : The font extents retrieved
* @ user_data : User data pointer passed by the caller
*
* This method should retrieve the extents for a font .
*
**/
typedef hb_bool_t (*hb_font_get_font_extents_func_t) (hb_font_t *font, void *font_data,
hb_font_extents_t *extents,
void *user_data);
/**
* hb_font_get_font_h_extents_func_t :
*
* A virtual method for the # hb_font_funcs_t of an # hb_font_t object .
*
* This method should retrieve the extents for a font , for horizontal - direction
* text segments . Extents must be returned in an # hb_glyph_extents output
* parameter .
*
**/
typedef hb_font_get_font_extents_func_t hb_font_get_font_h_extents_func_t;
/**
* hb_font_get_font_v_extents_func_t :
*
* A virtual method for the # hb_font_funcs_t of an # hb_font_t object .
*
* This method should retrieve the extents for a font , for vertical - direction
* text segments . Extents must be returned in an # hb_glyph_extents output
* parameter .
*
**/
typedef hb_font_get_font_extents_func_t hb_font_get_font_v_extents_func_t;
/**
* hb_font_get_nominal_glyph_func_t :
* @ font : # hb_font_t to work upon
* @ font_data : @ font user data pointer
* @ unicode : The Unicode code point to query
* @ glyph : ( out ) : The glyph ID retrieved
* @ user_data : User data pointer passed by the caller
*
* A virtual method for the # hb_font_funcs_t of an # hb_font_t object .
*
* This method should retrieve the nominal glyph ID for a specified Unicode code
* point . Glyph IDs must be returned in a # hb_codepoint_t output parameter .
*
* Return value : ` true ` if data found , ` false ` otherwise
*
**/
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);
/**
* hb_font_get_variation_glyph_func_t :
* @ font : # hb_font_t to work upon
* @ font_data : @ font user data pointer
* @ unicode : The Unicode code point to query
* @ variation_selector : The variation - selector code point to query
* @ glyph : ( out ) : The glyph ID retrieved
* @ user_data : User data pointer passed by the caller
*
* A virtual method for the # hb_font_funcs_t of an # hb_font_t object .
*
* This method should retrieve the glyph ID for a specified Unicode code point
* followed by a specified Variation Selector code point . Glyph IDs must be
* returned in a # hb_codepoint_t output parameter .
*
* Return value : ` true ` if data found , ` false ` otherwise
*
**/
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);
/**
* hb_font_get_nominal_glyphs_func_t :
* @ font : # hb_font_t to work upon
* @ font_data : @ font user data pointer
* @ count : number of code points to query
* @ first_unicode : The first Unicode code point to query
* @ unicode_stride : The stride between successive code points
* @ first_glyph : ( out ) : The first glyph ID retrieved
* @ glyph_stride : The stride between successive glyph IDs
* @ user_data : User data pointer passed by the caller
*
* A virtual method for the # hb_font_funcs_t of an # hb_font_t object .
*
* This method should retrieve the nominal glyph IDs for a sequence of
* Unicode code points . Glyph IDs must be returned in a # hb_codepoint_t
* output parameter .
*
* Return value : the number of code points processed
*
**/
typedef unsigned int (*hb_font_get_nominal_glyphs_func_t) (hb_font_t *font, void *font_data,
unsigned int count,
const hb_codepoint_t *first_unicode,
unsigned int unicode_stride,
hb_codepoint_t *first_glyph,
unsigned int glyph_stride,
void *user_data);
/**
* hb_font_get_glyph_advance_func_t :
* @ font : # hb_font_t to work upon
* @ font_data : @ font user data pointer
* @ glyph : The glyph ID to query
* @ user_data : User data pointer passed by the caller
*
* A virtual method for the # hb_font_funcs_t of an # hb_font_t object .
*
* This method should retrieve the advance for a specified glyph . The
* method must return an # hb_position_t .
*
* Return value : The advance of @ glyph within @ font
*
**/
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);
/**
* hb_font_get_glyph_h_advance_func_t :
*
* A virtual method for the # hb_font_funcs_t of an # hb_font_t object .
*
* This method should retrieve the advance for a specified glyph , in
* horizontal - direction text segments . Advances must be returned in
* an # hb_position_t output parameter .
*
**/
typedef hb_font_get_glyph_advance_func_t hb_font_get_glyph_h_advance_func_t;
/**
* hb_font_get_glyph_v_advance_func_t :
*
* A virtual method for the # hb_font_funcs_t of an # hb_font_t object .
*
* This method should retrieve the advance for a specified glyph , in
* vertical - direction text segments . Advances must be returned in
* an # hb_position_t output parameter .
*
**/
typedef hb_font_get_glyph_advance_func_t hb_font_get_glyph_v_advance_func_t;
/**
* hb_font_get_glyph_advances_func_t :
* @ font : # hb_font_t to work upon
* @ font_data : @ font user data pointer
* @ count : The number of glyph IDs in the sequence queried
* @ first_glyph : The first glyph ID to query
* @ glyph_stride : The stride between successive glyph IDs
* @ first_advance : ( out ) : The first advance retrieved
* @ advance_stride : The stride between successive advances
* @ user_data : User data pointer passed by the caller
*
* A virtual method for the # hb_font_funcs_t of an # hb_font_t object .
*
* This method should retrieve the advances for a sequence of glyphs .
*
**/
typedef void (*hb_font_get_glyph_advances_func_t) (hb_font_t* font, void * font_data,
unsigned int count,
const hb_codepoint_t *first_glyph,
unsigned glyph_stride,
hb_position_t *first_advance,
unsigned advance_stride,
void *user_data);
/**
* hb_font_get_glyph_h_advances_func_t :
*
* A virtual method for the # hb_font_funcs_t of an # hb_font_t object .
*
* This method should retrieve the advances for a sequence of glyphs , in
* horizontal - direction text segments .
*
**/
typedef hb_font_get_glyph_advances_func_t hb_font_get_glyph_h_advances_func_t;
/**
* hb_font_get_glyph_v_advances_func_t :
*
* A virtual method for the # hb_font_funcs_t of an # hb_font_t object .
*
* This method should retrieve the advances for a sequence of glyphs , in
* vertical - direction text segments .
*
**/
typedef hb_font_get_glyph_advances_func_t hb_font_get_glyph_v_advances_func_t;
/**
* hb_font_get_glyph_origin_func_t :
* @ font : # hb_font_t to work upon
* @ font_data : @ font user data pointer
* @ glyph : The glyph ID to query
* @ x : ( out ) : The X coordinate of the origin
* @ y : ( out ) : The Y coordinate of the origin
* @ user_data : User data pointer passed by the caller
*
* A virtual method for the # hb_font_funcs_t of an # hb_font_t object .
*
* This method should retrieve the ( X , Y ) coordinates ( in font units ) of the
* origin for a glyph . Each coordinate must be returned in an # hb_position_t
* output parameter .
*
* Return value : ` true ` if data found , ` false ` otherwise
*
**/
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);
/**
* hb_font_get_glyph_h_origin_func_t :
*
* A virtual method for the # hb_font_funcs_t of an # hb_font_t object .
*
* This method should retrieve the ( X , Y ) coordinates ( in font units ) of the
* origin for a glyph , for horizontal - direction text segments . Each
* coordinate must be returned in an # hb_position_t output parameter .
*
**/
typedef hb_font_get_glyph_origin_func_t hb_font_get_glyph_h_origin_func_t;
/**
* hb_font_get_glyph_v_origin_func_t :
*
* A virtual method for the # hb_font_funcs_t of an # hb_font_t object .
*
* This method should retrieve the ( X , Y ) coordinates ( in font units ) of the
* origin for a glyph , for vertical - direction text segments . Each coordinate
* must be returned in an # hb_position_t output parameter .
*
**/
typedef hb_font_get_glyph_origin_func_t hb_font_get_glyph_v_origin_func_t;
/**
* hb_font_get_glyph_kerning_func_t :
* @ font : # hb_font_t to work upon
* @ font_data : @ font user data pointer
* @ first_glyph : The glyph ID of the first glyph in the glyph pair
* @ second_glyph : The glyph ID of the second glyph in the glyph pair
* @ user_data : User data pointer passed by the caller
*
* This method should retrieve the kerning - adjustment value for a glyph - pair in
* the specified font , for horizontal text segments .
*
**/
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);
/**
* hb_font_get_glyph_h_kerning_func_t :
*
* A virtual method for the # hb_font_funcs_t of an # hb_font_t object .
*
* This method should retrieve the kerning - adjustment value for a glyph - pair in
* the specified font , for horizontal text segments .
*
**/
typedef hb_font_get_glyph_kerning_func_t hb_font_get_glyph_h_kerning_func_t;
/**
* hb_font_get_glyph_extents_func_t :
* @ font : # hb_font_t to work upon
* @ font_data : @ font user data pointer
* @ glyph : The glyph ID to query
* @ extents : ( out ) : The # hb_glyph_extents_t retrieved
* @ user_data : User data pointer passed by the caller
*
* A virtual method for the # hb_font_funcs_t of an # hb_font_t object .
*
* This method should retrieve the extents for a specified glyph . Extents must be
* returned in an # hb_glyph_extents output parameter .
*
* Return value : ` true ` if data found , ` false ` otherwise
*
**/
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);
/**
* hb_font_get_glyph_contour_point_func_t :
* @ font : # hb_font_t to work upon
* @ font_data : @ font user data pointer
* @ glyph : The glyph ID to query
* @ point_index : The contour - point index to query
* @ x : ( out ) : The X value retrieved for the contour point
* @ y : ( out ) : The Y value retrieved for the contour point
* @ user_data : User data pointer passed by the caller
*
* A virtual method for the # hb_font_funcs_t of an # hb_font_t object .
*
* This method should retrieve the ( X , Y ) coordinates ( in font units ) for a
* specified contour point in a glyph . Each coordinate must be returned as
* an # hb_position_t output parameter .
*
* Return value : ` true ` if data found , ` false ` otherwise
*
**/
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);
/**
* hb_font_get_glyph_name_func_t :
* @ font : # hb_font_t to work upon
* @ font_data : @ font user data pointer
* @ glyph : The glyph ID to query
* @ name : ( out ) ( array length = size ) : Name string retrieved for the glyph ID
* @ size : Length of the glyph - name string retrieved
* @ user_data : User data pointer passed by the caller
*
* A virtual method for the # hb_font_funcs_t of an # hb_font_t object .
*
* This method should retrieve the glyph name that corresponds to a
* glyph ID . The name should be returned in a string output parameter .
*
* Return value : ` true ` if data found , ` false ` otherwise
*
**/
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);
/**
* hb_font_get_glyph_from_name_func_t :
* @ font : # hb_font_t to work upon
* @ font_data : @ font user data pointer
* @ name : ( array length = len ) : The name string to query
* @ len : The length of the name queried
* @ glyph : ( out ) : The glyph ID retrieved
* @ user_data : User data pointer passed by the caller
*
* A virtual method for the # hb_font_funcs_t of an # hb_font_t object .
*
* This method should retrieve the glyph ID that corresponds to a glyph - name
* string .
*
* Return value : ` true ` if data found , ` false ` otherwise
*
**/
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);
/**
* hb_font_draw_glyph_func_t :
* @ font : # hb_font_t to work upon
* @ font_data : @ font user data pointer
* @ glyph : The glyph ID to query
* @ draw_funcs : The draw functions to send the shape data to
* @ draw_data : The data accompanying the draw functions
* @ user_data : User data pointer passed by the caller
*
* A virtual method for the # hb_font_funcs_t of an # hb_font_t object .
*
* Since : 7 . 0 . 0
*
**/
typedef void (*hb_font_draw_glyph_func_t) (hb_font_t *font, void *font_data,
hb_codepoint_t glyph,
hb_draw_funcs_t *draw_funcs, void *draw_data,
void *user_data);
/**
* hb_font_paint_glyph_func_t :
* @ font : # hb_font_t to work upon
* @ font_data : @ font user data pointer
* @ glyph : The glyph ID to query
* @ paint_funcs : The paint functions to use
* @ paint_data : The data accompanying the paint functions
* @ palette_index : The color palette to use
* @ foreground : The foreground color
* @ user_data : User data pointer passed by the caller
*
* A virtual method for the # hb_font_funcs_t of an # hb_font_t object .
*
* Since : 7 . 0 . 0
*/
typedef void (*hb_font_paint_glyph_func_t) (hb_font_t *font, void *font_data,
hb_codepoint_t glyph,
hb_paint_funcs_t *paint_funcs, void *paint_data,
unsigned int palette_index,
hb_color_t foreground,
void *user_data);
/* func setters */
/**
* hb_font_funcs_set_font_h_extents_func :
* @ ffuncs : A font - function structure
* @ func : ( closure user_data ) ( destroy destroy ) ( scope notified ) : The callback function to assign
* @ user_data : Data to pass to @ func
* @ destroy : ( nullable ) : The function to call when @ user_data is not needed anymore
*
* Sets the implementation function for # hb_font_get_font_h_extents_func_t .
*
* 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 : A font - function structure
* @ func : ( closure user_data ) ( destroy destroy ) ( scope notified ) : The callback function to assign
* @ user_data : Data to pass to @ func
* @ destroy : ( nullable ) : The function to call when @ user_data is not needed anymore
*
* Sets the implementation function for # hb_font_get_font_v_extents_func_t .
*
* 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 : A font - function structure
* @ func : ( closure user_data ) ( destroy destroy ) ( scope notified ) : The callback function to assign
* @ user_data : Data to pass to @ func
* @ destroy : ( nullable ) : The function to call when @ user_data is not needed anymore
*
* Sets the implementation function for # hb_font_get_nominal_glyph_func_t .
*
* 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_nominal_glyphs_func :
* @ ffuncs : A font - function structure
* @ func : ( closure user_data ) ( destroy destroy ) ( scope notified ) : The callback function to assign
* @ user_data : Data to pass to @ func
* @ destroy : ( nullable ) : The function to call when @ user_data is not needed anymore
*
* Sets the implementation function for # hb_font_get_nominal_glyphs_func_t .
*
* Since : 2 . 0 . 0
**/
HB_EXTERN void
hb_font_funcs_set_nominal_glyphs_func (hb_font_funcs_t *ffuncs,
hb_font_get_nominal_glyphs_func_t func,
void *user_data, hb_destroy_func_t destroy);
/**
* hb_font_funcs_set_variation_glyph_func :
* @ ffuncs : A font - function structure
* @ func : ( closure user_data ) ( destroy destroy ) ( scope notified ) : The callback function to assign
* @ user_data : Data to pass to @ func
* @ destroy : ( nullable ) : The function to call when @ user_data is not needed anymore
*
* Sets the implementation function for # hb_font_get_variation_glyph_func_t .
*
* 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 : A font - function structure
* @ func : ( closure user_data ) ( destroy destroy ) ( scope notified ) : The callback function to assign
* @ user_data : Data to pass to @ func
* @ destroy : ( nullable ) : The function to call when @ user_data is not needed anymore
*
* Sets the implementation function for # hb_font_get_glyph_h_advance_func_t .
*
* 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 : A font - function structure
* @ func : ( closure user_data ) ( destroy destroy ) ( scope notified ) : The callback function to assign
* @ user_data : Data to pass to @ func
* @ destroy : ( nullable ) : The function to call when @ user_data is not needed anymore
*
* Sets the implementation function for # hb_font_get_glyph_v_advance_func_t .
*
* 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_advances_func :
* @ ffuncs : A font - function structure
* @ func : ( closure user_data ) ( destroy destroy ) ( scope notified ) : The callback function to assign
* @ user_data : Data to pass to @ func
* @ destroy : ( nullable ) : The function to call when @ user_data is not needed anymore
*
* Sets the implementation function for # hb_font_get_glyph_h_advances_func_t .
*
* Since : 1 . 8 . 6
**/
HB_EXTERN void
hb_font_funcs_set_glyph_h_advances_func (hb_font_funcs_t *ffuncs,
hb_font_get_glyph_h_advances_func_t func,
void *user_data, hb_destroy_func_t destroy);
/**
* hb_font_funcs_set_glyph_v_advances_func :
* @ ffuncs : A font - function structure
* @ func : ( closure user_data ) ( destroy destroy ) ( scope notified ) : The callback function to assign
* @ user_data : Data to pass to @ func
* @ destroy : ( nullable ) : The function to call when @ user_data is not needed anymore
*
* Sets the implementation function for # hb_font_get_glyph_v_advances_func_t .
*
* Since : 1 . 8 . 6
**/
HB_EXTERN void
hb_font_funcs_set_glyph_v_advances_func (hb_font_funcs_t *ffuncs,
hb_font_get_glyph_v_advances_func_t func,
void *user_data, hb_destroy_func_t destroy);
/**
* hb_font_funcs_set_glyph_h_origin_func :
* @ ffuncs : A font - function structure
* @ func : ( closure user_data ) ( destroy destroy ) ( scope notified ) : The callback function to assign
* @ user_data : Data to pass to @ func
* @ destroy : ( nullable ) : The function to call when @ user_data is not needed anymore
*
* Sets the implementation function for # hb_font_get_glyph_h_origin_func_t .
*
* 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 : A font - function structure
* @ func : ( closure user_data ) ( destroy destroy ) ( scope notified ) : The callback function to assign
* @ user_data : Data to pass to @ func
* @ destroy : ( nullable ) : The function to call when @ user_data is not needed anymore
*
* Sets the implementation function for # hb_font_get_glyph_v_origin_func_t .
*
* 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 : A font - function structure
* @ func : ( closure user_data ) ( destroy destroy ) ( scope notified ) : The callback function to assign
* @ user_data : Data to pass to @ func
* @ destroy : ( nullable ) : The function to call when @ user_data is not needed anymore
*
* Sets the implementation function for # hb_font_get_glyph_h_kerning_func_t .
*
* 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_extents_func :
* @ ffuncs : A font - function structure
* @ func : ( closure user_data ) ( destroy destroy ) ( scope notified ) : The callback function to assign
* @ user_data : Data to pass to @ func
* @ destroy : ( nullable ) : The function to call when @ user_data is not needed anymore
*
* Sets the implementation function for # hb_font_get_glyph_extents_func_t .
*
* 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 : A font - function structure
* @ func : ( closure user_data ) ( destroy destroy ) ( scope notified ) : The callback function to assign
* @ user_data : Data to pass to @ func
* @ destroy : ( nullable ) : The function to call when @ user_data is not needed anymore
*
* Sets the implementation function for # hb_font_get_glyph_contour_point_func_t .
*
* 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 : A font - function structure
* @ func : ( closure user_data ) ( destroy destroy ) ( scope notified ) : The callback function to assign
* @ user_data : Data to pass to @ func
* @ destroy : ( nullable ) : The function to call when @ user_data is not needed anymore
*
* Sets the implementation function for # hb_font_get_glyph_name_func_t .
*
* 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 : A font - function structure
* @ func : ( closure user_data ) ( destroy destroy ) ( scope notified ) : The callback function to assign
* @ user_data : Data to pass to @ func
* @ destroy : ( nullable ) : The function to call when @ user_data is not needed anymore
*
* Sets the implementation function for # hb_font_get_glyph_from_name_func_t .
*
* 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);
/**
* hb_font_funcs_set_draw_glyph_func :
* @ ffuncs : A font - function structure
* @ func : ( closure user_data ) ( destroy destroy ) ( scope notified ) : The callback function to assign
* @ user_data : Data to pass to @ func
* @ destroy : ( nullable ) : The function to call when @ user_data is not needed anymore
*
* Sets the implementation function for # hb_font_draw_glyph_func_t .
*
* Since : 7 . 0 . 0
**/
HB_EXTERN void
hb_font_funcs_set_draw_glyph_func (hb_font_funcs_t *ffuncs,
hb_font_draw_glyph_func_t func,
void *user_data, hb_destroy_func_t destroy);
/**
* hb_font_funcs_set_paint_glyph_func :
* @ ffuncs : A font - function structure
* @ func : ( closure user_data ) ( destroy destroy ) ( scope notified ) : The callback function to assign
* @ user_data : Data to pass to @ func
* @ destroy : ( nullable ) : The function to call when @ user_data is no longer needed
*
* Sets the implementation function for # hb_font_paint_glyph_func_t .
*
* Since : 7 . 0 . 0
*/
HB_EXTERN void
hb_font_funcs_set_paint_glyph_func (hb_font_funcs_t *ffuncs,
hb_font_paint_glyph_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 unsigned int
hb_font_get_nominal_glyphs (hb_font_t *font,
unsigned int count,
const hb_codepoint_t *first_unicode,
unsigned int unicode_stride,
hb_codepoint_t *first_glyph,
unsigned int glyph_stride);
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 void
hb_font_get_glyph_h_advances (hb_font_t* font,
unsigned int count,
const hb_codepoint_t *first_glyph,
unsigned glyph_stride,
hb_position_t *first_advance,
unsigned advance_stride);
HB_EXTERN void
hb_font_get_glyph_v_advances (hb_font_t* font,
unsigned int count,
const hb_codepoint_t *first_glyph,
unsigned glyph_stride,
hb_position_t *first_advance,
unsigned advance_stride);
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_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);
HB_EXTERN void
hb_font_draw_glyph (hb_font_t *font,
hb_codepoint_t glyph,
hb_draw_funcs_t *dfuncs, void *draw_data);
HB_EXTERN void
hb_font_paint_glyph (hb_font_t *font,
hb_codepoint_t glyph,
hb_paint_funcs_t *pfuncs, void *paint_data,
unsigned int palette_index,
hb_color_t foreground);
/* high-level funcs, with fallback */
/* Calls either hb_font_get_nominal_glyph() if variation_selector is 0,
* otherwise calls 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_advances_for_direction (hb_font_t* font,
hb_direction_t direction,
unsigned int count,
const hb_codepoint_t *first_glyph,
unsigned glyph_stride,
hb_position_t *first_advance,
unsigned advance_stride);
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 (const 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 unsigned int
hb_font_get_serial (hb_font_t *font);
HB_EXTERN void
hb_font_changed (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 void
hb_font_set_face (hb_font_t *font,
hb_face_t *face);
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);
/*
* Point size per EM . Used for optical - sizing in CoreText .
* A value of zero means " not set " .
*/
HB_EXTERN void
hb_font_set_ptem (hb_font_t *font, float ptem);
HB_EXTERN float
hb_font_get_ptem (hb_font_t *font);
HB_EXTERN void
hb_font_set_synthetic_bold (hb_font_t *font,
float x_embolden, float y_embolden,
hb_bool_t in_place);
HB_EXTERN void
hb_font_get_synthetic_bold (hb_font_t *font,
float *x_embolden, float *y_embolden,
hb_bool_t *in_place);
HB_EXTERN void
hb_font_set_synthetic_slant (hb_font_t *font, float slant);
HB_EXTERN float
hb_font_get_synthetic_slant (hb_font_t *font);
HB_EXTERN void
hb_font_set_variations (hb_font_t *font,
const hb_variation_t *variations,
unsigned int variations_length);
HB_EXTERN void
hb_font_set_variation (hb_font_t *font,
hb_tag_t tag,
float value);
HB_EXTERN void
hb_font_set_var_coords_design (hb_font_t *font,
const float *coords,
unsigned int coords_length);
HB_EXTERN const float *
hb_font_get_var_coords_design (hb_font_t *font,
unsigned int *length);
HB_EXTERN void
hb_font_set_var_coords_normalized (hb_font_t *font,
const int *coords, /* 2.14 normalized */
unsigned int coords_length);
HB_EXTERN const int *
hb_font_get_var_coords_normalized (hb_font_t *font,
unsigned int *length);
/**
* HB_FONT_NO_VAR_NAMED_INSTANCE :
*
* Constant signifying that a font does not have any
* named - instance index set . This is the default of
* a font .
*
* Since : 7 . 0 . 0
*/
#define HB_FONT_NO_VAR_NAMED_INSTANCE 0 xFFFFFFFF
HB_EXTERN void
hb_font_set_var_named_instance (hb_font_t *font,
unsigned int instance_index);
HB_EXTERN unsigned int
hb_font_get_var_named_instance (hb_font_t *font);
HB_END_DECLS
#endif /* HB_FONT_H */
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