1064 lines
33 KiB
C
1064 lines
33 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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#if !defined(HB_H_IN) && !defined(HB_NO_SINGLE_HEADER_ERROR)
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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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#include "hb-draw.h"
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HB_BEGIN_DECLS
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/**
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* hb_font_t:
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*
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* Data type for holding fonts.
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*
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*/
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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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/**
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* hb_font_funcs_t:
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*
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* Data type containing a set of virtual methods used for
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* working on #hb_font_t font objects.
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*
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* HarfBuzz provides a lightweight default function for each of
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* the methods in #hb_font_funcs_t. Client programs can implement
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* their own replacements for the individual font functions, as
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* needed, and replace the default by calling the setter for a
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* method.
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*
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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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/**
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* hb_font_extents_t:
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* @ascender: The height of typographic ascenders.
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* @descender: The depth of typographic descenders.
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* @line_gap: The suggested line-spacing gap.
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*
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* Font-wide extent values, measured in font units.
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*
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* Note that typically @ascender is positive and @descender
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* negative, in coordinate systems that grow up.
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**/
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typedef struct hb_font_extents_t {
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hb_position_t ascender;
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hb_position_t descender;
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hb_position_t line_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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/**
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* hb_glyph_extents_t:
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* @x_bearing: Distance from the x-origin to the left extremum of the glyph.
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* @y_bearing: Distance from the top extremum of the glyph to the y-origin.
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* @width: Distance from the left extremum of the glyph to the right extremum.
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* @height: Distance from the top extremum of the glyph to the bottom extremum.
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*
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* Glyph extent values, measured in font units.
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*
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* Note that @height is negative, in coordinate systems that grow up.
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**/
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typedef struct hb_glyph_extents_t {
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hb_position_t x_bearing;
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hb_position_t y_bearing;
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hb_position_t width;
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hb_position_t height;
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} hb_glyph_extents_t;
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/* func types */
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/**
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* hb_font_get_font_extents_func_t:
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* @font: #hb_font_t to work upon
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* @font_data: @font user data pointer
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* @extents: (out): The font extents retrieved
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* @user_data: User data pointer passed by the caller
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*
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* This method should retrieve the extents for a font.
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*
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**/
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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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/**
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* hb_font_get_font_h_extents_func_t:
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*
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* A virtual method for the #hb_font_funcs_t of an #hb_font_t object.
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*
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* This method should retrieve the extents for a font, for horizontal-direction
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* text segments. Extents must be returned in an #hb_glyph_extents output
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* parameter.
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*
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**/
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typedef hb_font_get_font_extents_func_t hb_font_get_font_h_extents_func_t;
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/**
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* hb_font_get_font_v_extents_func_t:
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*
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* A virtual method for the #hb_font_funcs_t of an #hb_font_t object.
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*
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* This method should retrieve the extents for a font, for vertical-direction
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* text segments. Extents must be returned in an #hb_glyph_extents output
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* parameter.
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*
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**/
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typedef hb_font_get_font_extents_func_t hb_font_get_font_v_extents_func_t;
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/**
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* hb_font_get_nominal_glyph_func_t:
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* @font: #hb_font_t to work upon
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* @font_data: @font user data pointer
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* @unicode: The Unicode code point to query
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* @glyph: (out): The glyph ID retrieved
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* @user_data: User data pointer passed by the caller
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*
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* A virtual method for the #hb_font_funcs_t of an #hb_font_t object.
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*
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* This method should retrieve the nominal glyph ID for a specified Unicode code
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* point. Glyph IDs must be returned in a #hb_codepoint_t output parameter.
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*
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* Return value: %true if data found, %false otherwise
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*
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**/
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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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/**
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* hb_font_get_variation_glyph_func_t:
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* @font: #hb_font_t to work upon
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* @font_data: @font user data pointer
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* @unicode: The Unicode code point to query
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* @variation_selector: The variation-selector code point to query
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* @glyph: (out): The glyph ID retrieved
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* @user_data: User data pointer passed by the caller
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*
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* A virtual method for the #hb_font_funcs_t of an #hb_font_t object.
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*
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* This method should retrieve the glyph ID for a specified Unicode code point
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* followed by a specified Variation Selector code point. Glyph IDs must be
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* returned in a #hb_codepoint_t output parameter.
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*
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* Return value: %true if data found, %false otherwise
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*
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**/
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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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/**
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* hb_font_get_nominal_glyphs_func_t:
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* @font: #hb_font_t to work upon
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* @font_data: @font user data pointer
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* @count: number of code points to query
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* @first_unicode: The first Unicode code point to query
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* @unicode_stride: The stride between successive code points
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* @first_glyph: (out): The first glyph ID retrieved
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* @glyph_stride: The stride between successive glyph IDs
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* @user_data: User data pointer passed by the caller
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*
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* A virtual method for the #hb_font_funcs_t of an #hb_font_t object.
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*
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* This method should retrieve the nominal glyph IDs for a sequence of
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* Unicode code points. Glyph IDs must be returned in a #hb_codepoint_t
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* output parameter.
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*
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* Return value: the number of code points processed
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*
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**/
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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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/**
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* hb_font_get_glyph_advance_func_t:
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* @font: #hb_font_t to work upon
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* @font_data: @font user data pointer
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* @glyph: The glyph ID to query
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* @user_data: User data pointer passed by the caller
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*
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* A virtual method for the #hb_font_funcs_t of an #hb_font_t object.
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*
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* This method should retrieve the advance for a specified glyph. The
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* method must return an #hb_position_t.
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*
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* Return value: The advance of @glyph within @font
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*
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**/
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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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/**
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* hb_font_get_glyph_h_advance_func_t:
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*
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* A virtual method for the #hb_font_funcs_t of an #hb_font_t object.
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*
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* This method should retrieve the advance for a specified glyph, in
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* horizontal-direction text segments. Advances must be returned in
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* an #hb_position_t output parameter.
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*
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**/
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typedef hb_font_get_glyph_advance_func_t hb_font_get_glyph_h_advance_func_t;
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/**
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* hb_font_get_glyph_v_advance_func_t:
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*
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* A virtual method for the #hb_font_funcs_t of an #hb_font_t object.
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*
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* This method should retrieve the advance for a specified glyph, in
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* vertical-direction text segments. Advances must be returned in
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* an #hb_position_t output parameter.
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*
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**/
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typedef hb_font_get_glyph_advance_func_t hb_font_get_glyph_v_advance_func_t;
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/**
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* hb_font_get_glyph_advances_func_t:
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* @font: #hb_font_t to work upon
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* @font_data: @font user data pointer
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* @count: The number of glyph IDs in the sequence queried
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* @first_glyph: The first glyph ID to query
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* @glyph_stride: The stride between successive glyph IDs
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* @first_advance: (out): The first advance retrieved
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* @advance_stride: The stride between successive advances
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* @user_data: User data pointer passed by the caller
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*
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* A virtual method for the #hb_font_funcs_t of an #hb_font_t object.
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*
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* This method should retrieve the advances for a sequence of glyphs.
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*
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**/
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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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/**
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* hb_font_get_glyph_h_advances_func_t:
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*
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* A virtual method for the #hb_font_funcs_t of an #hb_font_t object.
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*
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* This method should retrieve the advances for a sequence of glyphs, in
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* horizontal-direction text segments.
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*
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**/
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typedef hb_font_get_glyph_advances_func_t hb_font_get_glyph_h_advances_func_t;
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/**
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* hb_font_get_glyph_v_advances_func_t:
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*
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* A virtual method for the #hb_font_funcs_t of an #hb_font_t object.
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*
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* This method should retrieve the advances for a sequence of glyphs, in
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* vertical-direction text segments.
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*
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**/
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typedef hb_font_get_glyph_advances_func_t hb_font_get_glyph_v_advances_func_t;
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/**
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* hb_font_get_glyph_origin_func_t:
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* @font: #hb_font_t to work upon
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* @font_data: @font user data pointer
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* @glyph: The glyph ID to query
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* @x: (out): The X coordinate of the origin
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* @y: (out): The Y coordinate of the origin
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* @user_data: User data pointer passed by the caller
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*
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* A virtual method for the #hb_font_funcs_t of an #hb_font_t object.
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*
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* This method should retrieve the (X,Y) coordinates (in font units) of the
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* origin for a glyph. Each coordinate must be returned in an #hb_position_t
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* output parameter.
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*
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* Return value: %true if data found, %false otherwise
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*
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**/
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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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/**
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* hb_font_get_glyph_h_origin_func_t:
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*
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* A virtual method for the #hb_font_funcs_t of an #hb_font_t object.
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*
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* This method should retrieve the (X,Y) coordinates (in font units) of the
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* origin for a glyph, for horizontal-direction text segments. Each
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* coordinate must be returned in an #hb_position_t output parameter.
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*
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**/
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typedef hb_font_get_glyph_origin_func_t hb_font_get_glyph_h_origin_func_t;
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/**
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* hb_font_get_glyph_v_origin_func_t:
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*
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* A virtual method for the #hb_font_funcs_t of an #hb_font_t object.
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*
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* This method should retrieve the (X,Y) coordinates (in font units) of the
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* origin for a glyph, for vertical-direction text segments. Each coordinate
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* must be returned in an #hb_position_t output parameter.
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*
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**/
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typedef hb_font_get_glyph_origin_func_t hb_font_get_glyph_v_origin_func_t;
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/**
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* hb_font_get_glyph_kerning_func_t:
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* @font: #hb_font_t to work upon
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* @font_data: @font user data pointer
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* @first_glyph: The glyph ID of the first glyph in the glyph pair
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* @second_glyph: The glyph ID of the second glyph in the glyph pair
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* @user_data: User data pointer passed by the caller
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*
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* This method should retrieve the kerning-adjustment value for a glyph-pair in
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* the specified font, for horizontal text segments.
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*
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**/
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typedef hb_position_t (*hb_font_get_glyph_kerning_func_t) (hb_font_t *font, void *font_data,
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hb_codepoint_t first_glyph, hb_codepoint_t second_glyph,
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void *user_data);
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/**
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* hb_font_get_glyph_h_kerning_func_t:
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*
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* A virtual method for the #hb_font_funcs_t of an #hb_font_t object.
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*
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* This method should retrieve the kerning-adjustment value for a glyph-pair in
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* the specified font, for horizontal text segments.
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*
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**/
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typedef hb_font_get_glyph_kerning_func_t hb_font_get_glyph_h_kerning_func_t;
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/**
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* hb_font_get_glyph_extents_func_t:
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* @font: #hb_font_t to work upon
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* @font_data: @font user data pointer
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* @glyph: The glyph ID to query
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* @extents: (out): The #hb_glyph_extents_t retrieved
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* @user_data: User data pointer passed by the caller
|
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*
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* A virtual method for the #hb_font_funcs_t of an #hb_font_t object.
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*
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* This method should retrieve the extents for a specified glyph. Extents must be
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* returned in an #hb_glyph_extents output parameter.
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*
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* Return value: %true if data found, %false otherwise
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*
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**/
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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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|
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/**
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* hb_font_get_glyph_contour_point_func_t:
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* @font: #hb_font_t to work upon
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* @font_data: @font user data pointer
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* @glyph: The glyph ID to query
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* @point_index: The contour-point index to query
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* @x: (out): The X value retrieved for the contour point
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* @y: (out): The Y value retrieved for the contour point
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* @user_data: User data pointer passed by the caller
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*
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* A virtual method for the #hb_font_funcs_t of an #hb_font_t object.
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*
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|
* This method should retrieve the (X,Y) coordinates (in font units) for a
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* specified contour point in a glyph. Each coordinate must be returned as
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* an #hb_position_t output parameter.
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*
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* Return value: %true if data found, %false otherwise
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*
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**/
|
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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,
|
|
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);
|
|
|
|
|
|
/* 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);
|
|
|
|
/* 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);
|
|
|
|
|
|
/* 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,
|
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hb_position_t *x, hb_position_t *y);
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HB_EXTERN void
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hb_font_get_glyph_kerning_for_direction (hb_font_t *font,
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hb_codepoint_t first_glyph, hb_codepoint_t second_glyph,
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hb_direction_t direction,
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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_extents_for_origin (hb_font_t *font,
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hb_codepoint_t glyph,
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hb_direction_t direction,
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hb_glyph_extents_t *extents);
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HB_EXTERN hb_bool_t
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hb_font_get_glyph_contour_point_for_origin (hb_font_t *font,
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hb_codepoint_t glyph, unsigned int point_index,
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hb_direction_t direction,
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hb_position_t *x, hb_position_t *y);
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/* Generates gidDDD if glyph has no name. */
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HB_EXTERN void
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hb_font_glyph_to_string (hb_font_t *font,
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hb_codepoint_t glyph,
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char *s, unsigned int size);
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/* Parses gidDDD and uniUUUU strings automatically. */
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HB_EXTERN hb_bool_t
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hb_font_glyph_from_string (hb_font_t *font,
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|
const char *s, int len, /* -1 means nul-terminated */
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hb_codepoint_t *glyph);
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|
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/*
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|
* hb_font_t
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*/
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|
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/* Fonts are very light-weight objects */
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HB_EXTERN hb_font_t *
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|
hb_font_create (hb_face_t *face);
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|
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HB_EXTERN hb_font_t *
|
|
hb_font_create_sub_font (hb_font_t *parent);
|
|
|
|
HB_EXTERN hb_font_t *
|
|
hb_font_get_empty (void);
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|
|
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HB_EXTERN hb_font_t *
|
|
hb_font_reference (hb_font_t *font);
|
|
|
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HB_EXTERN void
|
|
hb_font_destroy (hb_font_t *font);
|
|
|
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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);
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|
|
|
|
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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);
|
|
|
|
#ifdef HB_EXPERIMENTAL_API
|
|
HB_EXTERN const float *
|
|
hb_font_get_var_coords_design (hb_font_t *font,
|
|
unsigned int *length);
|
|
#endif
|
|
|
|
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_EXTERN void
|
|
hb_font_set_var_named_instance (hb_font_t *font,
|
|
unsigned instance_index);
|
|
|
|
#ifdef HB_EXPERIMENTAL_API
|
|
HB_EXTERN hb_bool_t
|
|
hb_font_draw_glyph (hb_font_t *font, hb_codepoint_t glyph,
|
|
const hb_draw_funcs_t *funcs, void *user_data);
|
|
#endif
|
|
|
|
HB_END_DECLS
|
|
|
|
#endif /* HB_FONT_H */
|