680 lines
18 KiB
C
680 lines
18 KiB
C
/*
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* Copyright © 2009 Red Hat, Inc.
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*
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* This is part of HarfBuzz, a text shaping library.
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*
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* Permission is hereby granted, without written agreement and without
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* license or royalty fees, to use, copy, modify, and distribute this
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* software and its documentation for any purpose, provided that the
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* above copyright notice and the following two paragraphs appear in
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* all copies of this software.
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*
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* IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
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* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
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* ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
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* IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
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* DAMAGE.
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*
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* THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
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* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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* FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
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* ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
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* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
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*
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* Red Hat Author(s): Behdad Esfahbod
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*/
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#ifndef HB_H_IN
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#error "Include <hb.h> instead."
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#endif
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#ifndef HB_FONT_H
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#define HB_FONT_H
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#include "hb-common.h"
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#include "hb-face.h"
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HB_BEGIN_DECLS
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typedef struct hb_font_t hb_font_t;
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/*
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* hb_font_funcs_t
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*/
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typedef struct hb_font_funcs_t hb_font_funcs_t;
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HB_EXTERN hb_font_funcs_t *
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hb_font_funcs_create (void);
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HB_EXTERN hb_font_funcs_t *
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hb_font_funcs_get_empty (void);
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HB_EXTERN hb_font_funcs_t *
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hb_font_funcs_reference (hb_font_funcs_t *ffuncs);
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HB_EXTERN void
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hb_font_funcs_destroy (hb_font_funcs_t *ffuncs);
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HB_EXTERN hb_bool_t
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hb_font_funcs_set_user_data (hb_font_funcs_t *ffuncs,
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hb_user_data_key_t *key,
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void * data,
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hb_destroy_func_t destroy,
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hb_bool_t replace);
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HB_EXTERN void *
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hb_font_funcs_get_user_data (hb_font_funcs_t *ffuncs,
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hb_user_data_key_t *key);
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HB_EXTERN void
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hb_font_funcs_make_immutable (hb_font_funcs_t *ffuncs);
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HB_EXTERN hb_bool_t
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hb_font_funcs_is_immutable (hb_font_funcs_t *ffuncs);
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/* font and glyph extents */
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/* Note that typically ascender is positive and descender negative in coordinate systems that grow up. */
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typedef struct hb_font_extents_t
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{
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hb_position_t ascender; /* typographic ascender. */
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hb_position_t descender; /* typographic descender. */
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hb_position_t line_gap; /* suggested line spacing gap. */
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/*< private >*/
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hb_position_t reserved9;
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hb_position_t reserved8;
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hb_position_t reserved7;
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hb_position_t reserved6;
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hb_position_t reserved5;
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hb_position_t reserved4;
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hb_position_t reserved3;
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hb_position_t reserved2;
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hb_position_t reserved1;
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} hb_font_extents_t;
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/* Note that height is negative in coordinate systems that grow up. */
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typedef struct hb_glyph_extents_t
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{
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hb_position_t x_bearing; /* left side of glyph from origin. */
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hb_position_t y_bearing; /* top side of glyph from origin. */
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hb_position_t width; /* distance from left to right side. */
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hb_position_t height; /* distance from top to bottom side. */
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} hb_glyph_extents_t;
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/* func types */
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typedef hb_bool_t (*hb_font_get_font_extents_func_t) (hb_font_t *font, void *font_data,
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hb_font_extents_t *extents,
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void *user_data);
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typedef hb_font_get_font_extents_func_t hb_font_get_font_h_extents_func_t;
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typedef hb_font_get_font_extents_func_t hb_font_get_font_v_extents_func_t;
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typedef hb_bool_t (*hb_font_get_nominal_glyph_func_t) (hb_font_t *font, void *font_data,
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hb_codepoint_t unicode,
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hb_codepoint_t *glyph,
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void *user_data);
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typedef hb_bool_t (*hb_font_get_variation_glyph_func_t) (hb_font_t *font, void *font_data,
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hb_codepoint_t unicode, hb_codepoint_t variation_selector,
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hb_codepoint_t *glyph,
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void *user_data);
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typedef unsigned int (*hb_font_get_nominal_glyphs_func_t) (hb_font_t *font, void *font_data,
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unsigned int count,
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const hb_codepoint_t *first_unicode,
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unsigned int unicode_stride,
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hb_codepoint_t *first_glyph,
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unsigned int glyph_stride,
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void *user_data);
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typedef hb_position_t (*hb_font_get_glyph_advance_func_t) (hb_font_t *font, void *font_data,
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hb_codepoint_t glyph,
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void *user_data);
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typedef hb_font_get_glyph_advance_func_t hb_font_get_glyph_h_advance_func_t;
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typedef hb_font_get_glyph_advance_func_t hb_font_get_glyph_v_advance_func_t;
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typedef void (*hb_font_get_glyph_advances_func_t) (hb_font_t* font, void* font_data,
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unsigned int count,
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const hb_codepoint_t *first_glyph,
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unsigned glyph_stride,
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hb_position_t *first_advance,
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unsigned advance_stride,
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void *user_data);
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typedef hb_font_get_glyph_advances_func_t hb_font_get_glyph_h_advances_func_t;
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typedef hb_font_get_glyph_advances_func_t hb_font_get_glyph_v_advances_func_t;
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typedef hb_bool_t (*hb_font_get_glyph_origin_func_t) (hb_font_t *font, void *font_data,
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hb_codepoint_t glyph,
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hb_position_t *x, hb_position_t *y,
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void *user_data);
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typedef hb_font_get_glyph_origin_func_t hb_font_get_glyph_h_origin_func_t;
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typedef hb_font_get_glyph_origin_func_t hb_font_get_glyph_v_origin_func_t;
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typedef hb_bool_t (*hb_font_get_glyph_extents_func_t) (hb_font_t *font, void *font_data,
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hb_codepoint_t glyph,
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hb_glyph_extents_t *extents,
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void *user_data);
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typedef hb_bool_t (*hb_font_get_glyph_contour_point_func_t) (hb_font_t *font, void *font_data,
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hb_codepoint_t glyph, unsigned int point_index,
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hb_position_t *x, hb_position_t *y,
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void *user_data);
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typedef hb_bool_t (*hb_font_get_glyph_name_func_t) (hb_font_t *font, void *font_data,
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hb_codepoint_t glyph,
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char *name, unsigned int size,
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void *user_data);
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typedef hb_bool_t (*hb_font_get_glyph_from_name_func_t) (hb_font_t *font, void *font_data,
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const char *name, int len, /* -1 means nul-terminated */
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hb_codepoint_t *glyph,
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void *user_data);
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/* func setters */
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/**
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* hb_font_funcs_set_font_h_extents_func:
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* @ffuncs: font functions.
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* @func: (closure user_data) (destroy destroy) (scope notified):
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* @user_data:
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* @destroy:
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*
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*
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*
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* Since: 1.1.2
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**/
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HB_EXTERN void
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hb_font_funcs_set_font_h_extents_func (hb_font_funcs_t *ffuncs,
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hb_font_get_font_h_extents_func_t func,
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void *user_data, hb_destroy_func_t destroy);
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/**
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* hb_font_funcs_set_font_v_extents_func:
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* @ffuncs: font functions.
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* @func: (closure user_data) (destroy destroy) (scope notified):
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* @user_data:
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* @destroy:
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*
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*
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*
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* Since: 1.1.2
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**/
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HB_EXTERN void
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hb_font_funcs_set_font_v_extents_func (hb_font_funcs_t *ffuncs,
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hb_font_get_font_v_extents_func_t func,
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void *user_data, hb_destroy_func_t destroy);
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/**
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* hb_font_funcs_set_nominal_glyph_func:
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* @ffuncs: font functions.
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* @func: (closure user_data) (destroy destroy) (scope notified):
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* @user_data:
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* @destroy:
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*
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*
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*
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* Since: 1.2.3
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**/
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HB_EXTERN void
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hb_font_funcs_set_nominal_glyph_func (hb_font_funcs_t *ffuncs,
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hb_font_get_nominal_glyph_func_t func,
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void *user_data, hb_destroy_func_t destroy);
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/**
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* hb_font_funcs_set_nominal_glyphs_func:
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* @ffuncs: font functions.
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* @func: (closure user_data) (destroy destroy) (scope notified):
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* @user_data:
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* @destroy:
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*
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*
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*
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* Since: 2.0.0
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**/
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HB_EXTERN void
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hb_font_funcs_set_nominal_glyphs_func (hb_font_funcs_t *ffuncs,
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hb_font_get_nominal_glyphs_func_t func,
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void *user_data, hb_destroy_func_t destroy);
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/**
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* hb_font_funcs_set_variation_glyph_func:
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* @ffuncs: font functions.
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* @func: (closure user_data) (destroy destroy) (scope notified):
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* @user_data:
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* @destroy:
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*
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*
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*
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* Since: 1.2.3
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**/
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HB_EXTERN void
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hb_font_funcs_set_variation_glyph_func (hb_font_funcs_t *ffuncs,
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hb_font_get_variation_glyph_func_t func,
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void *user_data, hb_destroy_func_t destroy);
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/**
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* hb_font_funcs_set_glyph_h_advance_func:
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* @ffuncs: font functions.
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* @func: (closure user_data) (destroy destroy) (scope notified):
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* @user_data:
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* @destroy:
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*
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*
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*
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* Since: 0.9.2
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**/
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HB_EXTERN void
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hb_font_funcs_set_glyph_h_advance_func (hb_font_funcs_t *ffuncs,
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hb_font_get_glyph_h_advance_func_t func,
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void *user_data, hb_destroy_func_t destroy);
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/**
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* hb_font_funcs_set_glyph_v_advance_func:
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* @ffuncs: font functions.
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* @func: (closure user_data) (destroy destroy) (scope notified):
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* @user_data:
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* @destroy:
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*
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*
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*
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* Since: 0.9.2
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**/
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HB_EXTERN void
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hb_font_funcs_set_glyph_v_advance_func (hb_font_funcs_t *ffuncs,
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hb_font_get_glyph_v_advance_func_t func,
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void *user_data, hb_destroy_func_t destroy);
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/**
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* hb_font_funcs_set_glyph_h_advances_func:
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* @ffuncs: font functions.
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* @func: (closure user_data) (destroy destroy) (scope notified):
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* @user_data:
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* @destroy:
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*
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*
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*
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* Since: 1.8.6
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**/
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HB_EXTERN void
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hb_font_funcs_set_glyph_h_advances_func (hb_font_funcs_t *ffuncs,
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hb_font_get_glyph_h_advances_func_t func,
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void *user_data, hb_destroy_func_t destroy);
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/**
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* hb_font_funcs_set_glyph_v_advances_func:
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* @ffuncs: font functions.
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* @func: (closure user_data) (destroy destroy) (scope notified):
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* @user_data:
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* @destroy:
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*
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*
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*
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* Since: 1.8.6
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**/
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HB_EXTERN void
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hb_font_funcs_set_glyph_v_advances_func (hb_font_funcs_t *ffuncs,
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hb_font_get_glyph_v_advances_func_t func,
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void *user_data, hb_destroy_func_t destroy);
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/**
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* hb_font_funcs_set_glyph_h_origin_func:
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* @ffuncs: font functions.
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* @func: (closure user_data) (destroy destroy) (scope notified):
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* @user_data:
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* @destroy:
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*
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*
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*
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* Since: 0.9.2
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**/
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HB_EXTERN void
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hb_font_funcs_set_glyph_h_origin_func (hb_font_funcs_t *ffuncs,
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hb_font_get_glyph_h_origin_func_t func,
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void *user_data, hb_destroy_func_t destroy);
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/**
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* hb_font_funcs_set_glyph_v_origin_func:
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* @ffuncs: font functions.
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* @func: (closure user_data) (destroy destroy) (scope notified):
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* @user_data:
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* @destroy:
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*
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*
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*
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* Since: 0.9.2
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**/
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HB_EXTERN void
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hb_font_funcs_set_glyph_v_origin_func (hb_font_funcs_t *ffuncs,
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hb_font_get_glyph_v_origin_func_t func,
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void *user_data, hb_destroy_func_t destroy);
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/**
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* hb_font_funcs_set_glyph_extents_func:
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* @ffuncs: font functions.
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* @func: (closure user_data) (destroy destroy) (scope notified):
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* @user_data:
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* @destroy:
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*
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*
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*
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* Since: 0.9.2
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**/
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HB_EXTERN void
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hb_font_funcs_set_glyph_extents_func (hb_font_funcs_t *ffuncs,
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hb_font_get_glyph_extents_func_t func,
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void *user_data, hb_destroy_func_t destroy);
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/**
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* hb_font_funcs_set_glyph_contour_point_func:
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* @ffuncs: font functions.
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* @func: (closure user_data) (destroy destroy) (scope notified):
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* @user_data:
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* @destroy:
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*
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*
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*
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* Since: 0.9.2
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**/
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HB_EXTERN void
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hb_font_funcs_set_glyph_contour_point_func (hb_font_funcs_t *ffuncs,
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hb_font_get_glyph_contour_point_func_t func,
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void *user_data, hb_destroy_func_t destroy);
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/**
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* hb_font_funcs_set_glyph_name_func:
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* @ffuncs: font functions.
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* @func: (closure user_data) (destroy destroy) (scope notified):
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* @user_data:
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* @destroy:
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*
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*
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*
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* Since: 0.9.2
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**/
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HB_EXTERN void
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hb_font_funcs_set_glyph_name_func (hb_font_funcs_t *ffuncs,
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hb_font_get_glyph_name_func_t func,
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void *user_data, hb_destroy_func_t destroy);
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/**
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* hb_font_funcs_set_glyph_from_name_func:
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* @ffuncs: font functions.
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* @func: (closure user_data) (destroy destroy) (scope notified):
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* @user_data:
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* @destroy:
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*
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*
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*
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* Since: 0.9.2
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**/
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HB_EXTERN void
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hb_font_funcs_set_glyph_from_name_func (hb_font_funcs_t *ffuncs,
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hb_font_get_glyph_from_name_func_t func,
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void *user_data, hb_destroy_func_t destroy);
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/* func dispatch */
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HB_EXTERN hb_bool_t
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hb_font_get_h_extents (hb_font_t *font,
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hb_font_extents_t *extents);
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HB_EXTERN hb_bool_t
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hb_font_get_v_extents (hb_font_t *font,
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hb_font_extents_t *extents);
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HB_EXTERN hb_bool_t
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hb_font_get_nominal_glyph (hb_font_t *font,
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hb_codepoint_t unicode,
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hb_codepoint_t *glyph);
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HB_EXTERN hb_bool_t
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hb_font_get_variation_glyph (hb_font_t *font,
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hb_codepoint_t unicode, hb_codepoint_t variation_selector,
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hb_codepoint_t *glyph);
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HB_EXTERN hb_position_t
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hb_font_get_glyph_h_advance (hb_font_t *font,
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hb_codepoint_t glyph);
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HB_EXTERN hb_position_t
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hb_font_get_glyph_v_advance (hb_font_t *font,
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hb_codepoint_t glyph);
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HB_EXTERN void
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hb_font_get_glyph_h_advances (hb_font_t* font,
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unsigned int count,
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const hb_codepoint_t *first_glyph,
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unsigned glyph_stride,
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hb_position_t *first_advance,
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unsigned advance_stride);
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HB_EXTERN void
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hb_font_get_glyph_v_advances (hb_font_t* font,
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unsigned int count,
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const hb_codepoint_t *first_glyph,
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unsigned glyph_stride,
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hb_position_t *first_advance,
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unsigned advance_stride);
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HB_EXTERN hb_bool_t
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hb_font_get_glyph_h_origin (hb_font_t *font,
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hb_codepoint_t glyph,
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hb_position_t *x, hb_position_t *y);
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HB_EXTERN hb_bool_t
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hb_font_get_glyph_v_origin (hb_font_t *font,
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hb_codepoint_t glyph,
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hb_position_t *x, hb_position_t *y);
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HB_EXTERN hb_bool_t
|
|
hb_font_get_glyph_extents (hb_font_t *font,
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|
hb_codepoint_t glyph,
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|
hb_glyph_extents_t *extents);
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|
|
|
HB_EXTERN hb_bool_t
|
|
hb_font_get_glyph_contour_point (hb_font_t *font,
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hb_codepoint_t glyph, unsigned int point_index,
|
|
hb_position_t *x, hb_position_t *y);
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|
|
|
HB_EXTERN hb_bool_t
|
|
hb_font_get_glyph_name (hb_font_t *font,
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|
hb_codepoint_t glyph,
|
|
char *name, unsigned int size);
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|
HB_EXTERN hb_bool_t
|
|
hb_font_get_glyph_from_name (hb_font_t *font,
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|
const char *name, int len, /* -1 means nul-terminated */
|
|
hb_codepoint_t *glyph);
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|
|
|
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/* high-level funcs, with fallback */
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/* Calls either hb_font_get_nominal_glyph() if variation_selector is 0,
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* otherwise calls hb_font_get_variation_glyph(). */
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|
HB_EXTERN hb_bool_t
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|
hb_font_get_glyph (hb_font_t *font,
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hb_codepoint_t unicode, hb_codepoint_t variation_selector,
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|
hb_codepoint_t *glyph);
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|
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HB_EXTERN void
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hb_font_get_extents_for_direction (hb_font_t *font,
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|
hb_direction_t direction,
|
|
hb_font_extents_t *extents);
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HB_EXTERN void
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hb_font_get_glyph_advance_for_direction (hb_font_t *font,
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|
hb_codepoint_t glyph,
|
|
hb_direction_t direction,
|
|
hb_position_t *x, hb_position_t *y);
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|
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 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 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_variations (hb_font_t *font,
|
|
const hb_variation_t *variations,
|
|
unsigned int variations_length);
|
|
|
|
HB_EXTERN void
|
|
hb_font_set_var_coords_design (hb_font_t *font,
|
|
const float *coords,
|
|
unsigned int coords_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_END_DECLS
|
|
|
|
#endif /* HB_FONT_H */
|