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Diffstat (limited to 'gfx/harfbuzz/src/hb-font.h')
| -rw-r--r-- | gfx/harfbuzz/src/hb-font.h | 1153 |
1 files changed, 1153 insertions, 0 deletions
diff --git a/gfx/harfbuzz/src/hb-font.h b/gfx/harfbuzz/src/hb-font.h new file mode 100644 index 0000000000..3c2355af2d --- /dev/null +++ b/gfx/harfbuzz/src/hb-font.h @@ -0,0 +1,1153 @@ +/* + * Copyright © 2009 Red Hat, Inc. + * + * This is part of HarfBuzz, a text shaping library. + * + * Permission is hereby granted, without written agreement and without + * license or royalty fees, to use, copy, modify, and distribute this + * software and its documentation for any purpose, provided that the + * above copyright notice and the following two paragraphs appear in + * all copies of this software. + * + * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR + * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES + * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN + * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH + * DAMAGE. + * + * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, + * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND + * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS + * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO + * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. + * + * Red Hat Author(s): Behdad Esfahbod + */ + +#if !defined(HB_H_IN) && !defined(HB_NO_SINGLE_HEADER_ERROR) +#error "Include <hb.h> instead." +#endif + +#ifndef HB_FONT_H +#define HB_FONT_H + +#include "hb-common.h" +#include "hb-face.h" +#include "hb-draw.h" +#include "hb-paint.h" + +HB_BEGIN_DECLS + +/* + * hb_font_funcs_t + */ + +/** + * hb_font_funcs_t: + * + * Data type containing a set of virtual methods used for + * working on #hb_font_t font objects. + * + * HarfBuzz provides a lightweight default function for each of + * the methods in #hb_font_funcs_t. Client programs can implement + * their own replacements for the individual font functions, as + * needed, and replace the default by calling the setter for a + * method. + * + **/ +typedef struct hb_font_funcs_t hb_font_funcs_t; + +HB_EXTERN hb_font_funcs_t * +hb_font_funcs_create (void); + +HB_EXTERN hb_font_funcs_t * +hb_font_funcs_get_empty (void); + +HB_EXTERN hb_font_funcs_t * +hb_font_funcs_reference (hb_font_funcs_t *ffuncs); + +HB_EXTERN void +hb_font_funcs_destroy (hb_font_funcs_t *ffuncs); + +HB_EXTERN hb_bool_t +hb_font_funcs_set_user_data (hb_font_funcs_t *ffuncs, + hb_user_data_key_t *key, + void * data, + hb_destroy_func_t destroy, + hb_bool_t replace); + + +HB_EXTERN void * +hb_font_funcs_get_user_data (const hb_font_funcs_t *ffuncs, + hb_user_data_key_t *key); + + +HB_EXTERN void +hb_font_funcs_make_immutable (hb_font_funcs_t *ffuncs); + +HB_EXTERN hb_bool_t +hb_font_funcs_is_immutable (hb_font_funcs_t *ffuncs); + + +/* font extents */ + +/** + * hb_font_extents_t: + * @ascender: The height of typographic ascenders. + * @descender: The depth of typographic descenders. + * @line_gap: The suggested line-spacing gap. + * + * Font-wide extent values, measured in font units. + * + * Note that typically @ascender is positive and @descender + * negative, in coordinate systems that grow up. + **/ +typedef struct hb_font_extents_t { + hb_position_t ascender; + hb_position_t descender; + hb_position_t line_gap; + /*< private >*/ + hb_position_t reserved9; + hb_position_t reserved8; + hb_position_t reserved7; + hb_position_t reserved6; + hb_position_t reserved5; + hb_position_t reserved4; + hb_position_t reserved3; + hb_position_t reserved2; + hb_position_t reserved1; +} hb_font_extents_t; + +/* func types */ + +/** + * hb_font_get_font_extents_func_t: + * @font: #hb_font_t to work upon + * @font_data: @font user data pointer + * @extents: (out): The font extents retrieved + * @user_data: User data pointer passed by the caller + * + * This method should retrieve the extents for a font. + * + **/ +typedef hb_bool_t (*hb_font_get_font_extents_func_t) (hb_font_t *font, void *font_data, + hb_font_extents_t *extents, + void *user_data); + +/** + * hb_font_get_font_h_extents_func_t: + * + * A virtual method for the #hb_font_funcs_t of an #hb_font_t object. + * + * This method should retrieve the extents for a font, for horizontal-direction + * text segments. Extents must be returned in an #hb_glyph_extents output + * parameter. + * + **/ +typedef hb_font_get_font_extents_func_t hb_font_get_font_h_extents_func_t; + +/** + * hb_font_get_font_v_extents_func_t: + * + * A virtual method for the #hb_font_funcs_t of an #hb_font_t object. + * + * This method should retrieve the extents for a font, for vertical-direction + * text segments. Extents must be returned in an #hb_glyph_extents output + * parameter. + * + **/ +typedef hb_font_get_font_extents_func_t hb_font_get_font_v_extents_func_t; + + +/** + * hb_font_get_nominal_glyph_func_t: + * @font: #hb_font_t to work upon + * @font_data: @font user data pointer + * @unicode: The Unicode code point to query + * @glyph: (out): The glyph ID retrieved + * @user_data: User data pointer passed by the caller + * + * A virtual method for the #hb_font_funcs_t of an #hb_font_t object. + * + * This method should retrieve the nominal glyph ID for a specified Unicode code + * point. Glyph IDs must be returned in a #hb_codepoint_t output parameter. + * + * Return value: `true` if data found, `false` otherwise + * + **/ +typedef hb_bool_t (*hb_font_get_nominal_glyph_func_t) (hb_font_t *font, void *font_data, + hb_codepoint_t unicode, + hb_codepoint_t *glyph, + void *user_data); + +/** + * hb_font_get_variation_glyph_func_t: + * @font: #hb_font_t to work upon + * @font_data: @font user data pointer + * @unicode: The Unicode code point to query + * @variation_selector: The variation-selector code point to query + * @glyph: (out): The glyph ID retrieved + * @user_data: User data pointer passed by the caller + * + * A virtual method for the #hb_font_funcs_t of an #hb_font_t object. + * + * This method should retrieve the glyph ID for a specified Unicode code point + * followed by a specified Variation Selector code point. Glyph IDs must be + * returned in a #hb_codepoint_t output parameter. + * + * Return value: `true` if data found, `false` otherwise + * + **/ +typedef hb_bool_t (*hb_font_get_variation_glyph_func_t) (hb_font_t *font, void *font_data, + hb_codepoint_t unicode, hb_codepoint_t variation_selector, + hb_codepoint_t *glyph, + void *user_data); + + +/** + * hb_font_get_nominal_glyphs_func_t: + * @font: #hb_font_t to work upon + * @font_data: @font user data pointer + * @count: number of code points to query + * @first_unicode: The first Unicode code point to query + * @unicode_stride: The stride between successive code points + * @first_glyph: (out): The first glyph ID retrieved + * @glyph_stride: The stride between successive glyph IDs + * @user_data: User data pointer passed by the caller + * + * A virtual method for the #hb_font_funcs_t of an #hb_font_t object. + * + * This method should retrieve the nominal glyph IDs for a sequence of + * Unicode code points. Glyph IDs must be returned in a #hb_codepoint_t + * output parameter. + * + * Return value: the number of code points processed + * + **/ +typedef unsigned int (*hb_font_get_nominal_glyphs_func_t) (hb_font_t *font, void *font_data, + unsigned int count, + const hb_codepoint_t *first_unicode, + unsigned int unicode_stride, + hb_codepoint_t *first_glyph, + unsigned int glyph_stride, + void *user_data); + +/** + * hb_font_get_glyph_advance_func_t: + * @font: #hb_font_t to work upon + * @font_data: @font user data pointer + * @glyph: The glyph ID to query + * @user_data: User data pointer passed by the caller + * + * A virtual method for the #hb_font_funcs_t of an #hb_font_t object. + * + * This method should retrieve the advance for a specified glyph. The + * method must return an #hb_position_t. + * + * Return value: The advance of @glyph within @font + * + **/ +typedef hb_position_t (*hb_font_get_glyph_advance_func_t) (hb_font_t *font, void *font_data, + hb_codepoint_t glyph, + void *user_data); + +/** + * hb_font_get_glyph_h_advance_func_t: + * + * A virtual method for the #hb_font_funcs_t of an #hb_font_t object. + * + * This method should retrieve the advance for a specified glyph, in + * horizontal-direction text segments. Advances must be returned in + * an #hb_position_t output parameter. + * + **/ +typedef hb_font_get_glyph_advance_func_t hb_font_get_glyph_h_advance_func_t; + +/** + * hb_font_get_glyph_v_advance_func_t: + * + * A virtual method for the #hb_font_funcs_t of an #hb_font_t object. + * + * This method should retrieve the advance for a specified glyph, in + * vertical-direction text segments. Advances must be returned in + * an #hb_position_t output parameter. + * + **/ +typedef hb_font_get_glyph_advance_func_t hb_font_get_glyph_v_advance_func_t; + +/** + * hb_font_get_glyph_advances_func_t: + * @font: #hb_font_t to work upon + * @font_data: @font user data pointer + * @count: The number of glyph IDs in the sequence queried + * @first_glyph: The first glyph ID to query + * @glyph_stride: The stride between successive glyph IDs + * @first_advance: (out): The first advance retrieved + * @advance_stride: The stride between successive advances + * @user_data: User data pointer passed by the caller + * + * A virtual method for the #hb_font_funcs_t of an #hb_font_t object. + * + * This method should retrieve the advances for a sequence of glyphs. + * + **/ +typedef void (*hb_font_get_glyph_advances_func_t) (hb_font_t* font, void* font_data, + unsigned int count, + const hb_codepoint_t *first_glyph, + unsigned glyph_stride, + hb_position_t *first_advance, + unsigned advance_stride, + void *user_data); + +/** + * hb_font_get_glyph_h_advances_func_t: + * + * A virtual method for the #hb_font_funcs_t of an #hb_font_t object. + * + * This method should retrieve the advances for a sequence of glyphs, in + * horizontal-direction text segments. + * + **/ +typedef hb_font_get_glyph_advances_func_t hb_font_get_glyph_h_advances_func_t; + +/** + * hb_font_get_glyph_v_advances_func_t: + * + * A virtual method for the #hb_font_funcs_t of an #hb_font_t object. + * + * This method should retrieve the advances for a sequence of glyphs, in + * vertical-direction text segments. + * + **/ +typedef hb_font_get_glyph_advances_func_t hb_font_get_glyph_v_advances_func_t; + +/** + * hb_font_get_glyph_origin_func_t: + * @font: #hb_font_t to work upon + * @font_data: @font user data pointer + * @glyph: The glyph ID to query + * @x: (out): The X coordinate of the origin + * @y: (out): The Y coordinate of the origin + * @user_data: User data pointer passed by the caller + * + * A virtual method for the #hb_font_funcs_t of an #hb_font_t object. + * + * This method should retrieve the (X,Y) coordinates (in font units) of the + * origin for a glyph. Each coordinate must be returned in an #hb_position_t + * output parameter. + * + * Return value: `true` if data found, `false` otherwise + * + **/ +typedef hb_bool_t (*hb_font_get_glyph_origin_func_t) (hb_font_t *font, void *font_data, + hb_codepoint_t glyph, + hb_position_t *x, hb_position_t *y, + void *user_data); + +/** + * hb_font_get_glyph_h_origin_func_t: + * + * A virtual method for the #hb_font_funcs_t of an #hb_font_t object. + * + * This method should retrieve the (X,Y) coordinates (in font units) of the + * origin for a glyph, for horizontal-direction text segments. Each + * coordinate must be returned in an #hb_position_t output parameter. + * + **/ +typedef hb_font_get_glyph_origin_func_t hb_font_get_glyph_h_origin_func_t; + +/** + * hb_font_get_glyph_v_origin_func_t: + * + * A virtual method for the #hb_font_funcs_t of an #hb_font_t object. + * + * This method should retrieve the (X,Y) coordinates (in font units) of the + * origin for a glyph, for vertical-direction text segments. Each coordinate + * must be returned in an #hb_position_t output parameter. + * + **/ +typedef hb_font_get_glyph_origin_func_t hb_font_get_glyph_v_origin_func_t; + +/** + * hb_font_get_glyph_kerning_func_t: + * @font: #hb_font_t to work upon + * @font_data: @font user data pointer + * @first_glyph: The glyph ID of the first glyph in the glyph pair + * @second_glyph: The glyph ID of the second glyph in the glyph pair + * @user_data: User data pointer passed by the caller + * + * This method should retrieve the kerning-adjustment value for a glyph-pair in + * the specified font, for horizontal text segments. + * + **/ +typedef hb_position_t (*hb_font_get_glyph_kerning_func_t) (hb_font_t *font, void *font_data, + hb_codepoint_t first_glyph, hb_codepoint_t second_glyph, + void *user_data); +/** + * hb_font_get_glyph_h_kerning_func_t: + * + * A virtual method for the #hb_font_funcs_t of an #hb_font_t object. + * + * This method should retrieve the kerning-adjustment value for a glyph-pair in + * the specified font, for horizontal text segments. + * + **/ +typedef hb_font_get_glyph_kerning_func_t hb_font_get_glyph_h_kerning_func_t; + + +/** + * hb_font_get_glyph_extents_func_t: + * @font: #hb_font_t to work upon + * @font_data: @font user data pointer + * @glyph: The glyph ID to query + * @extents: (out): The #hb_glyph_extents_t retrieved + * @user_data: User data pointer passed by the caller + * + * A virtual method for the #hb_font_funcs_t of an #hb_font_t object. + * + * This method should retrieve the extents for a specified glyph. Extents must be + * returned in an #hb_glyph_extents output parameter. + * + * Return value: `true` if data found, `false` otherwise + * + **/ +typedef hb_bool_t (*hb_font_get_glyph_extents_func_t) (hb_font_t *font, void *font_data, + hb_codepoint_t glyph, + hb_glyph_extents_t *extents, + void *user_data); + +/** + * hb_font_get_glyph_contour_point_func_t: + * @font: #hb_font_t to work upon + * @font_data: @font user data pointer + * @glyph: The glyph ID to query + * @point_index: The contour-point index to query + * @x: (out): The X value retrieved for the contour point + * @y: (out): The Y value retrieved for the contour point + * @user_data: User data pointer passed by the caller + * + * A virtual method for the #hb_font_funcs_t of an #hb_font_t object. + * + * This method should retrieve the (X,Y) coordinates (in font units) for a + * specified contour point in a glyph. Each coordinate must be returned as + * an #hb_position_t output parameter. + * + * Return value: `true` if data found, `false` otherwise + * + **/ +typedef hb_bool_t (*hb_font_get_glyph_contour_point_func_t) (hb_font_t *font, void *font_data, + hb_codepoint_t glyph, unsigned int point_index, + hb_position_t *x, hb_position_t *y, + void *user_data); + + +/** + * hb_font_get_glyph_name_func_t: + * @font: #hb_font_t to work upon + * @font_data: @font user data pointer + * @glyph: The glyph ID to query + * @name: (out) (array length=size): Name string retrieved for the glyph ID + * @size: Length of the glyph-name string retrieved + * @user_data: User data pointer passed by the caller + * + * A virtual method for the #hb_font_funcs_t of an #hb_font_t object. + * + * This method should retrieve the glyph name that corresponds to a + * glyph ID. The name should be returned in a string output parameter. + * + * Return value: `true` if data found, `false` otherwise + * + **/ +typedef hb_bool_t (*hb_font_get_glyph_name_func_t) (hb_font_t *font, void *font_data, + hb_codepoint_t glyph, + char *name, unsigned int size, + void *user_data); + +/** + * hb_font_get_glyph_from_name_func_t: + * @font: #hb_font_t to work upon + * @font_data: @font user data pointer + * @name: (array length=len): The name string to query + * @len: The length of the name queried + * @glyph: (out): The glyph ID retrieved + * @user_data: User data pointer passed by the caller + * + * A virtual method for the #hb_font_funcs_t of an #hb_font_t object. + * + * This method should retrieve the glyph ID that corresponds to a glyph-name + * string. + * + * Return value: `true` if data found, `false` otherwise + * + **/ +typedef hb_bool_t (*hb_font_get_glyph_from_name_func_t) (hb_font_t *font, void *font_data, + const char *name, int len, /* -1 means nul-terminated */ + hb_codepoint_t *glyph, + void *user_data); + +/** + * hb_font_draw_glyph_func_t: + * @font: #hb_font_t to work upon + * @font_data: @font user data pointer + * @glyph: The glyph ID to query + * @draw_funcs: The draw functions to send the shape data to + * @draw_data: The data accompanying the draw functions + * @user_data: User data pointer passed by the caller + * + * A virtual method for the #hb_font_funcs_t of an #hb_font_t object. + * + * Since: 7.0.0 + * + **/ +typedef void (*hb_font_draw_glyph_func_t) (hb_font_t *font, void *font_data, + hb_codepoint_t glyph, + hb_draw_funcs_t *draw_funcs, void *draw_data, + void *user_data); + +/** + * hb_font_paint_glyph_func_t: + * @font: #hb_font_t to work upon + * @font_data: @font user data pointer + * @glyph: The glyph ID to query + * @paint_funcs: The paint functions to use + * @paint_data: The data accompanying the paint functions + * @palette_index: The color palette to use + * @foreground: The foreground color + * @user_data: User data pointer passed by the caller + * + * A virtual method for the #hb_font_funcs_t of an #hb_font_t object. + * + * Since: 7.0.0 + */ +typedef void (*hb_font_paint_glyph_func_t) (hb_font_t *font, void *font_data, + hb_codepoint_t glyph, + hb_paint_funcs_t *paint_funcs, void *paint_data, + unsigned int palette_index, + hb_color_t foreground, + void *user_data); + +/* func setters */ + +/** + * hb_font_funcs_set_font_h_extents_func: + * @ffuncs: A font-function structure + * @func: (closure user_data) (destroy destroy) (scope notified): The callback function to assign + * @user_data: Data to pass to @func + * @destroy: (nullable): The function to call when @user_data is not needed anymore + * + * Sets the implementation function for #hb_font_get_font_h_extents_func_t. + * + * Since: 1.1.2 + **/ +HB_EXTERN void +hb_font_funcs_set_font_h_extents_func (hb_font_funcs_t *ffuncs, + hb_font_get_font_h_extents_func_t func, + void *user_data, hb_destroy_func_t destroy); + +/** + * hb_font_funcs_set_font_v_extents_func: + * @ffuncs: A font-function structure + * @func: (closure user_data) (destroy destroy) (scope notified): The callback function to assign + * @user_data: Data to pass to @func + * @destroy: (nullable): The function to call when @user_data is not needed anymore + * + * Sets the implementation function for #hb_font_get_font_v_extents_func_t. + * + * Since: 1.1.2 + **/ +HB_EXTERN void +hb_font_funcs_set_font_v_extents_func (hb_font_funcs_t *ffuncs, + hb_font_get_font_v_extents_func_t func, + void *user_data, hb_destroy_func_t destroy); + +/** + * hb_font_funcs_set_nominal_glyph_func: + * @ffuncs: A font-function structure + * @func: (closure user_data) (destroy destroy) (scope notified): The callback function to assign + * @user_data: Data to pass to @func + * @destroy: (nullable): The function to call when @user_data is not needed anymore + * + * Sets the implementation function for #hb_font_get_nominal_glyph_func_t. + * + * Since: 1.2.3 + **/ +HB_EXTERN void +hb_font_funcs_set_nominal_glyph_func (hb_font_funcs_t *ffuncs, + hb_font_get_nominal_glyph_func_t func, + void *user_data, hb_destroy_func_t destroy); + +/** + * hb_font_funcs_set_nominal_glyphs_func: + * @ffuncs: A font-function structure + * @func: (closure user_data) (destroy destroy) (scope notified): The callback function to assign + * @user_data: Data to pass to @func + * @destroy: (nullable): The function to call when @user_data is not needed anymore + * + * Sets the implementation function for #hb_font_get_nominal_glyphs_func_t. + * + * Since: 2.0.0 + **/ +HB_EXTERN void +hb_font_funcs_set_nominal_glyphs_func (hb_font_funcs_t *ffuncs, + hb_font_get_nominal_glyphs_func_t func, + void *user_data, hb_destroy_func_t destroy); + +/** + * hb_font_funcs_set_variation_glyph_func: + * @ffuncs: A font-function structure + * @func: (closure user_data) (destroy destroy) (scope notified): The callback function to assign + * @user_data: Data to pass to @func + * @destroy: (nullable): The function to call when @user_data is not needed anymore + * + * Sets the implementation function for #hb_font_get_variation_glyph_func_t. + * + * Since: 1.2.3 + **/ +HB_EXTERN void +hb_font_funcs_set_variation_glyph_func (hb_font_funcs_t *ffuncs, + hb_font_get_variation_glyph_func_t func, + void *user_data, hb_destroy_func_t destroy); + +/** + * hb_font_funcs_set_glyph_h_advance_func: + * @ffuncs: A font-function structure + * @func: (closure user_data) (destroy destroy) (scope notified): The callback function to assign + * @user_data: Data to pass to @func + * @destroy: (nullable): The function to call when @user_data is not needed anymore + * + * Sets the implementation function for #hb_font_get_glyph_h_advance_func_t. + * + * Since: 0.9.2 + **/ +HB_EXTERN void +hb_font_funcs_set_glyph_h_advance_func (hb_font_funcs_t *ffuncs, + hb_font_get_glyph_h_advance_func_t func, + void *user_data, hb_destroy_func_t destroy); + +/** + * hb_font_funcs_set_glyph_v_advance_func: + * @ffuncs: A font-function structure + * @func: (closure user_data) (destroy destroy) (scope notified): The callback function to assign + * @user_data: Data to pass to @func + * @destroy: (nullable): The function to call when @user_data is not needed anymore + * + * Sets the implementation function for #hb_font_get_glyph_v_advance_func_t. + * + * Since: 0.9.2 + **/ +HB_EXTERN void +hb_font_funcs_set_glyph_v_advance_func (hb_font_funcs_t *ffuncs, + hb_font_get_glyph_v_advance_func_t func, + void *user_data, hb_destroy_func_t destroy); + +/** + * hb_font_funcs_set_glyph_h_advances_func: + * @ffuncs: A font-function structure + * @func: (closure user_data) (destroy destroy) (scope notified): The callback function to assign + * @user_data: Data to pass to @func + * @destroy: (nullable): The function to call when @user_data is not needed anymore + * + * Sets the implementation function for #hb_font_get_glyph_h_advances_func_t. + * + * Since: 1.8.6 + **/ +HB_EXTERN void +hb_font_funcs_set_glyph_h_advances_func (hb_font_funcs_t *ffuncs, + hb_font_get_glyph_h_advances_func_t func, + void *user_data, hb_destroy_func_t destroy); + +/** + * hb_font_funcs_set_glyph_v_advances_func: + * @ffuncs: A font-function structure + * @func: (closure user_data) (destroy destroy) (scope notified): The callback function to assign + * @user_data: Data to pass to @func + * @destroy: (nullable): The function to call when @user_data is not needed anymore + * + * Sets the implementation function for #hb_font_get_glyph_v_advances_func_t. + * + * Since: 1.8.6 + **/ +HB_EXTERN void +hb_font_funcs_set_glyph_v_advances_func (hb_font_funcs_t *ffuncs, + hb_font_get_glyph_v_advances_func_t func, + void *user_data, hb_destroy_func_t destroy); + +/** + * hb_font_funcs_set_glyph_h_origin_func: + * @ffuncs: A font-function structure + * @func: (closure user_data) (destroy destroy) (scope notified): The callback function to assign + * @user_data: Data to pass to @func + * @destroy: (nullable): The function to call when @user_data is not needed anymore + * + * Sets the implementation function for #hb_font_get_glyph_h_origin_func_t. + * + * Since: 0.9.2 + **/ +HB_EXTERN void +hb_font_funcs_set_glyph_h_origin_func (hb_font_funcs_t *ffuncs, + hb_font_get_glyph_h_origin_func_t func, + void *user_data, hb_destroy_func_t destroy); + +/** + * hb_font_funcs_set_glyph_v_origin_func: + * @ffuncs: A font-function structure + * @func: (closure user_data) (destroy destroy) (scope notified): The callback function to assign + * @user_data: Data to pass to @func + * @destroy: (nullable): The function to call when @user_data is not needed anymore + * + * Sets the implementation function for #hb_font_get_glyph_v_origin_func_t. + * + * Since: 0.9.2 + **/ +HB_EXTERN void +hb_font_funcs_set_glyph_v_origin_func (hb_font_funcs_t *ffuncs, + hb_font_get_glyph_v_origin_func_t func, + void *user_data, hb_destroy_func_t destroy); + +/** + * hb_font_funcs_set_glyph_h_kerning_func: + * @ffuncs: A font-function structure + * @func: (closure user_data) (destroy destroy) (scope notified): The callback function to assign + * @user_data: Data to pass to @func + * @destroy: (nullable): The function to call when @user_data is not needed anymore + * + * Sets the implementation function for #hb_font_get_glyph_h_kerning_func_t. + * + * Since: 0.9.2 + **/ +HB_EXTERN void +hb_font_funcs_set_glyph_h_kerning_func (hb_font_funcs_t *ffuncs, + hb_font_get_glyph_h_kerning_func_t func, + void *user_data, hb_destroy_func_t destroy); + +/** + * hb_font_funcs_set_glyph_extents_func: + * @ffuncs: A font-function structure + * @func: (closure user_data) (destroy destroy) (scope notified): The callback function to assign + * @user_data: Data to pass to @func + * @destroy: (nullable): The function to call when @user_data is not needed anymore + * + * Sets the implementation function for #hb_font_get_glyph_extents_func_t. + * + * Since: 0.9.2 + **/ +HB_EXTERN void +hb_font_funcs_set_glyph_extents_func (hb_font_funcs_t *ffuncs, + hb_font_get_glyph_extents_func_t func, + void *user_data, hb_destroy_func_t destroy); + +/** + * hb_font_funcs_set_glyph_contour_point_func: + * @ffuncs: A font-function structure + * @func: (closure user_data) (destroy destroy) (scope notified): The callback function to assign + * @user_data: Data to pass to @func + * @destroy: (nullable): The function to call when @user_data is not needed anymore + * + * Sets the implementation function for #hb_font_get_glyph_contour_point_func_t. + * + * Since: 0.9.2 + **/ +HB_EXTERN void +hb_font_funcs_set_glyph_contour_point_func (hb_font_funcs_t *ffuncs, + hb_font_get_glyph_contour_point_func_t func, + void *user_data, hb_destroy_func_t destroy); + +/** + * hb_font_funcs_set_glyph_name_func: + * @ffuncs: A font-function structure + * @func: (closure user_data) (destroy destroy) (scope notified): The callback function to assign + * @user_data: Data to pass to @func + * @destroy: (nullable): The function to call when @user_data is not needed anymore + * + * Sets the implementation function for #hb_font_get_glyph_name_func_t. + * + * Since: 0.9.2 + **/ +HB_EXTERN void +hb_font_funcs_set_glyph_name_func (hb_font_funcs_t *ffuncs, + hb_font_get_glyph_name_func_t func, + void *user_data, hb_destroy_func_t destroy); + +/** + * hb_font_funcs_set_glyph_from_name_func: + * @ffuncs: A font-function structure + * @func: (closure user_data) (destroy destroy) (scope notified): The callback function to assign + * @user_data: Data to pass to @func + * @destroy: (nullable): The function to call when @user_data is not needed anymore + * + * Sets the implementation function for #hb_font_get_glyph_from_name_func_t. + * + * Since: 0.9.2 + **/ +HB_EXTERN void +hb_font_funcs_set_glyph_from_name_func (hb_font_funcs_t *ffuncs, + hb_font_get_glyph_from_name_func_t func, + void *user_data, hb_destroy_func_t destroy); + +/** + * hb_font_funcs_set_draw_glyph_func: + * @ffuncs: A font-function structure + * @func: (closure user_data) (destroy destroy) (scope notified): The callback function to assign + * @user_data: Data to pass to @func + * @destroy: (nullable): The function to call when @user_data is not needed anymore + * + * Sets the implementation function for #hb_font_draw_glyph_func_t. + * + * Since: 7.0.0 + **/ +HB_EXTERN void +hb_font_funcs_set_draw_glyph_func (hb_font_funcs_t *ffuncs, + hb_font_draw_glyph_func_t func, + void *user_data, hb_destroy_func_t destroy); + +/** + * hb_font_funcs_set_paint_glyph_func: + * @ffuncs: A font-function structure + * @func: (closure user_data) (destroy destroy) (scope notified): The callback function to assign + * @user_data: Data to pass to @func + * @destroy: (nullable): The function to call when @user_data is no longer needed + * + * Sets the implementation function for #hb_font_paint_glyph_func_t. + * + * Since: 7.0.0 + */ +HB_EXTERN void +hb_font_funcs_set_paint_glyph_func (hb_font_funcs_t *ffuncs, + hb_font_paint_glyph_func_t func, + void *user_data, hb_destroy_func_t destroy); + +/* func dispatch */ + +HB_EXTERN hb_bool_t +hb_font_get_h_extents (hb_font_t *font, + hb_font_extents_t *extents); +HB_EXTERN hb_bool_t +hb_font_get_v_extents (hb_font_t *font, + hb_font_extents_t *extents); + +HB_EXTERN hb_bool_t +hb_font_get_nominal_glyph (hb_font_t *font, + hb_codepoint_t unicode, + hb_codepoint_t *glyph); +HB_EXTERN hb_bool_t +hb_font_get_variation_glyph (hb_font_t *font, + hb_codepoint_t unicode, hb_codepoint_t variation_selector, + hb_codepoint_t *glyph); + +HB_EXTERN unsigned int +hb_font_get_nominal_glyphs (hb_font_t *font, + unsigned int count, + const hb_codepoint_t *first_unicode, + unsigned int unicode_stride, + hb_codepoint_t *first_glyph, + unsigned int glyph_stride); + +HB_EXTERN hb_position_t +hb_font_get_glyph_h_advance (hb_font_t *font, + hb_codepoint_t glyph); +HB_EXTERN hb_position_t +hb_font_get_glyph_v_advance (hb_font_t *font, + hb_codepoint_t glyph); + +HB_EXTERN void +hb_font_get_glyph_h_advances (hb_font_t* font, + unsigned int count, + const hb_codepoint_t *first_glyph, + unsigned glyph_stride, + hb_position_t *first_advance, + unsigned advance_stride); +HB_EXTERN void +hb_font_get_glyph_v_advances (hb_font_t* font, + unsigned int count, + const hb_codepoint_t *first_glyph, + unsigned glyph_stride, + hb_position_t *first_advance, + unsigned advance_stride); + +HB_EXTERN hb_bool_t +hb_font_get_glyph_h_origin (hb_font_t *font, + hb_codepoint_t glyph, + hb_position_t *x, hb_position_t *y); +HB_EXTERN hb_bool_t +hb_font_get_glyph_v_origin (hb_font_t *font, + hb_codepoint_t glyph, + hb_position_t *x, hb_position_t *y); + +HB_EXTERN hb_position_t +hb_font_get_glyph_h_kerning (hb_font_t *font, + hb_codepoint_t left_glyph, hb_codepoint_t right_glyph); + +HB_EXTERN hb_bool_t +hb_font_get_glyph_extents (hb_font_t *font, + hb_codepoint_t glyph, + hb_glyph_extents_t *extents); + +HB_EXTERN hb_bool_t +hb_font_get_glyph_contour_point (hb_font_t *font, + hb_codepoint_t glyph, unsigned int point_index, + hb_position_t *x, hb_position_t *y); + +HB_EXTERN hb_bool_t +hb_font_get_glyph_name (hb_font_t *font, + hb_codepoint_t glyph, + char *name, unsigned int size); +HB_EXTERN hb_bool_t +hb_font_get_glyph_from_name (hb_font_t *font, + const char *name, int len, /* -1 means nul-terminated */ + hb_codepoint_t *glyph); + +HB_EXTERN void +hb_font_draw_glyph (hb_font_t *font, + hb_codepoint_t glyph, + hb_draw_funcs_t *dfuncs, void *draw_data); + +HB_EXTERN void +hb_font_paint_glyph (hb_font_t *font, + hb_codepoint_t glyph, + hb_paint_funcs_t *pfuncs, void *paint_data, + unsigned int palette_index, + hb_color_t foreground); + +/* high-level funcs, with fallback */ + +/* Calls either hb_font_get_nominal_glyph() if variation_selector is 0, + * otherwise calls hb_font_get_variation_glyph(). */ +HB_EXTERN hb_bool_t +hb_font_get_glyph (hb_font_t *font, + hb_codepoint_t unicode, hb_codepoint_t variation_selector, + hb_codepoint_t *glyph); + +HB_EXTERN void +hb_font_get_extents_for_direction (hb_font_t *font, + hb_direction_t direction, + hb_font_extents_t *extents); +HB_EXTERN void +hb_font_get_glyph_advance_for_direction (hb_font_t *font, + hb_codepoint_t glyph, + hb_direction_t direction, + hb_position_t *x, hb_position_t *y); +HB_EXTERN void +hb_font_get_glyph_advances_for_direction (hb_font_t* font, + hb_direction_t direction, + unsigned int count, + const hb_codepoint_t *first_glyph, + unsigned glyph_stride, + hb_position_t *first_advance, + unsigned advance_stride); +HB_EXTERN void +hb_font_get_glyph_origin_for_direction (hb_font_t *font, + hb_codepoint_t glyph, + hb_direction_t direction, + hb_position_t *x, hb_position_t *y); +HB_EXTERN void +hb_font_add_glyph_origin_for_direction (hb_font_t *font, + hb_codepoint_t glyph, + hb_direction_t direction, + hb_position_t *x, hb_position_t *y); +HB_EXTERN void +hb_font_subtract_glyph_origin_for_direction (hb_font_t *font, + hb_codepoint_t glyph, + hb_direction_t direction, + hb_position_t *x, hb_position_t *y); + +HB_EXTERN void +hb_font_get_glyph_kerning_for_direction (hb_font_t *font, + hb_codepoint_t first_glyph, hb_codepoint_t second_glyph, + hb_direction_t direction, + hb_position_t *x, hb_position_t *y); + +HB_EXTERN hb_bool_t +hb_font_get_glyph_extents_for_origin (hb_font_t *font, + hb_codepoint_t glyph, + hb_direction_t direction, + hb_glyph_extents_t *extents); + +HB_EXTERN hb_bool_t +hb_font_get_glyph_contour_point_for_origin (hb_font_t *font, + hb_codepoint_t glyph, unsigned int point_index, + hb_direction_t direction, + hb_position_t *x, hb_position_t *y); + +/* Generates gidDDD if glyph has no name. */ +HB_EXTERN void +hb_font_glyph_to_string (hb_font_t *font, + hb_codepoint_t glyph, + char *s, unsigned int size); +/* Parses gidDDD and uniUUUU strings automatically. */ +HB_EXTERN hb_bool_t +hb_font_glyph_from_string (hb_font_t *font, + const char *s, int len, /* -1 means nul-terminated */ + hb_codepoint_t *glyph); + + +/* + * hb_font_t + */ + +/* Fonts are very light-weight objects */ + +HB_EXTERN hb_font_t * +hb_font_create (hb_face_t *face); + +HB_EXTERN hb_font_t * +hb_font_create_sub_font (hb_font_t *parent); + +HB_EXTERN hb_font_t * +hb_font_get_empty (void); + +HB_EXTERN hb_font_t * +hb_font_reference (hb_font_t *font); + +HB_EXTERN void +hb_font_destroy (hb_font_t *font); + +HB_EXTERN hb_bool_t +hb_font_set_user_data (hb_font_t *font, + hb_user_data_key_t *key, + void * data, + hb_destroy_func_t destroy, + hb_bool_t replace); + + +HB_EXTERN void * +hb_font_get_user_data (const hb_font_t *font, + hb_user_data_key_t *key); + +HB_EXTERN void +hb_font_make_immutable (hb_font_t *font); + +HB_EXTERN hb_bool_t +hb_font_is_immutable (hb_font_t *font); + +HB_EXTERN unsigned int +hb_font_get_serial (hb_font_t *font); + +HB_EXTERN void +hb_font_changed (hb_font_t *font); + +HB_EXTERN void +hb_font_set_parent (hb_font_t *font, + hb_font_t *parent); + +HB_EXTERN hb_font_t * +hb_font_get_parent (hb_font_t *font); + +HB_EXTERN void +hb_font_set_face (hb_font_t *font, + hb_face_t *face); + +HB_EXTERN hb_face_t * +hb_font_get_face (hb_font_t *font); + + +HB_EXTERN void +hb_font_set_funcs (hb_font_t *font, + hb_font_funcs_t *klass, + void *font_data, + hb_destroy_func_t destroy); + +/* Be *very* careful with this function! */ +HB_EXTERN void +hb_font_set_funcs_data (hb_font_t *font, + void *font_data, + hb_destroy_func_t destroy); + + +HB_EXTERN void +hb_font_set_scale (hb_font_t *font, + int x_scale, + int y_scale); + +HB_EXTERN void +hb_font_get_scale (hb_font_t *font, + int *x_scale, + int *y_scale); + +/* + * A zero value means "no hinting in that direction" + */ +HB_EXTERN void +hb_font_set_ppem (hb_font_t *font, + unsigned int x_ppem, + unsigned int y_ppem); + +HB_EXTERN void +hb_font_get_ppem (hb_font_t *font, + unsigned int *x_ppem, + unsigned int *y_ppem); + +/* + * Point size per EM. Used for optical-sizing in CoreText. + * A value of zero means "not set". + */ +HB_EXTERN void +hb_font_set_ptem (hb_font_t *font, float ptem); + +HB_EXTERN float +hb_font_get_ptem (hb_font_t *font); + +HB_EXTERN void +hb_font_set_synthetic_bold (hb_font_t *font, + float x_embolden, float y_embolden, + hb_bool_t in_place); + +HB_EXTERN void +hb_font_get_synthetic_bold (hb_font_t *font, + float *x_embolden, float *y_embolden, + hb_bool_t *in_place); + +HB_EXTERN void +hb_font_set_synthetic_slant (hb_font_t *font, float slant); + +HB_EXTERN float +hb_font_get_synthetic_slant (hb_font_t *font); + +HB_EXTERN void +hb_font_set_variations (hb_font_t *font, + const hb_variation_t *variations, + unsigned int variations_length); + +HB_EXTERN void +hb_font_set_variation (hb_font_t *font, + hb_tag_t tag, + float value); + +HB_EXTERN void +hb_font_set_var_coords_design (hb_font_t *font, + const float *coords, + unsigned int coords_length); + +HB_EXTERN const float * +hb_font_get_var_coords_design (hb_font_t *font, + unsigned int *length); + +HB_EXTERN void +hb_font_set_var_coords_normalized (hb_font_t *font, + const int *coords, /* 2.14 normalized */ + unsigned int coords_length); + +HB_EXTERN const int * +hb_font_get_var_coords_normalized (hb_font_t *font, + unsigned int *length); + +/** + * HB_FONT_NO_VAR_NAMED_INSTANCE: + * + * Constant signifying that a font does not have any + * named-instance index set. This is the default of + * a font. + * + * Since: 7.0.0 + */ +#define HB_FONT_NO_VAR_NAMED_INSTANCE 0xFFFFFFFF + +HB_EXTERN void +hb_font_set_var_named_instance (hb_font_t *font, + unsigned int instance_index); + +HB_EXTERN unsigned int +hb_font_get_var_named_instance (hb_font_t *font); + +HB_END_DECLS + +#endif /* HB_FONT_H */ |