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harfbuzz/src/hb-font.cc

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/*
* Copyright © 2009 Red Hat, Inc.
* Copyright © 2012 Google, 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
* Google Author(s): Behdad Esfahbod
*/
#include "hb.hh"
#include "hb-font.hh"
#include "hb-draw.hh"
#include "hb-machinery.hh"
#include "hb-ot.h"
#include "hb-ot-var-avar-table.hh"
#include "hb-ot-var-fvar-table.hh"
/**
* SECTION:hb-font
* @title: hb-font
* @short_description: Font objects
* @include: hb.h
*
* Functions for working with font objects.
*
* A font object represents a font face at a specific size and with
* certain other parameters (pixels-per-em, points-per-em, variation
* settings) specified. Font objects are created from font face
* objects, and are used as input to hb_shape(), among other things.
*
* Client programs can optionally pass in their own functions that
* implement the basic, lower-level queries of font objects. This set
* of font functions is defined by the virtual methods in
* #hb_font_funcs_t.
*
* HarfBuzz provides a built-in set of lightweight default
* functions for each method in #hb_font_funcs_t.
**/
/*
* hb_font_funcs_t
*/
static hb_bool_t
hb_font_get_font_h_extents_nil (hb_font_t *font HB_UNUSED,
void *font_data HB_UNUSED,
hb_font_extents_t *extents,
void *user_data HB_UNUSED)
{
memset (extents, 0, sizeof (*extents));
return false;
}
static hb_bool_t
hb_font_get_font_h_extents_default (hb_font_t *font,
void *font_data HB_UNUSED,
hb_font_extents_t *extents,
void *user_data HB_UNUSED)
{
hb_bool_t ret = font->parent->get_font_h_extents (extents);
if (ret) {
extents->ascender = font->parent_scale_y_distance (extents->ascender);
extents->descender = font->parent_scale_y_distance (extents->descender);
extents->line_gap = font->parent_scale_y_distance (extents->line_gap);
}
return ret;
}
static hb_bool_t
hb_font_get_font_v_extents_nil (hb_font_t *font HB_UNUSED,
void *font_data HB_UNUSED,
hb_font_extents_t *extents,
void *user_data HB_UNUSED)
{
memset (extents, 0, sizeof (*extents));
return false;
}
static hb_bool_t
hb_font_get_font_v_extents_default (hb_font_t *font,
void *font_data HB_UNUSED,
hb_font_extents_t *extents,
void *user_data HB_UNUSED)
{
hb_bool_t ret = font->parent->get_font_v_extents (extents);
if (ret) {
extents->ascender = font->parent_scale_x_distance (extents->ascender);
extents->descender = font->parent_scale_x_distance (extents->descender);
extents->line_gap = font->parent_scale_x_distance (extents->line_gap);
}
return ret;
}
static hb_bool_t
hb_font_get_nominal_glyph_nil (hb_font_t *font HB_UNUSED,
void *font_data HB_UNUSED,
hb_codepoint_t unicode HB_UNUSED,
hb_codepoint_t *glyph,
void *user_data HB_UNUSED)
{
*glyph = 0;
return false;
}
static hb_bool_t
hb_font_get_nominal_glyph_default (hb_font_t *font,
void *font_data HB_UNUSED,
hb_codepoint_t unicode,
hb_codepoint_t *glyph,
void *user_data HB_UNUSED)
{
if (font->has_nominal_glyphs_func_set ())
{
return font->get_nominal_glyphs (1, &unicode, 0, glyph, 0);
}
return font->parent->get_nominal_glyph (unicode, glyph);
}
#define hb_font_get_nominal_glyphs_nil hb_font_get_nominal_glyphs_default
static unsigned int
hb_font_get_nominal_glyphs_default (hb_font_t *font,
void *font_data HB_UNUSED,
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_UNUSED)
{
if (font->has_nominal_glyph_func_set ())
{
for (unsigned int i = 0; i < count; i++)
{
if (!font->get_nominal_glyph (*first_unicode, first_glyph))
return i;
first_unicode = &StructAtOffsetUnaligned<hb_codepoint_t> (first_unicode, unicode_stride);
first_glyph = &StructAtOffsetUnaligned<hb_codepoint_t> (first_glyph, glyph_stride);
}
return count;
}
return font->parent->get_nominal_glyphs (count,
first_unicode, unicode_stride,
first_glyph, glyph_stride);
}
static hb_bool_t
hb_font_get_variation_glyph_nil (hb_font_t *font HB_UNUSED,
void *font_data HB_UNUSED,
hb_codepoint_t unicode HB_UNUSED,
hb_codepoint_t variation_selector HB_UNUSED,
hb_codepoint_t *glyph,
void *user_data HB_UNUSED)
{
*glyph = 0;
return false;
}
static hb_bool_t
hb_font_get_variation_glyph_default (hb_font_t *font,
void *font_data HB_UNUSED,
hb_codepoint_t unicode,
hb_codepoint_t variation_selector,
hb_codepoint_t *glyph,
void *user_data HB_UNUSED)
{
return font->parent->get_variation_glyph (unicode, variation_selector, glyph);
}
static hb_position_t
hb_font_get_glyph_h_advance_nil (hb_font_t *font,
void *font_data HB_UNUSED,
hb_codepoint_t glyph HB_UNUSED,
void *user_data HB_UNUSED)
{
return font->x_scale;
}
static hb_position_t
hb_font_get_glyph_h_advance_default (hb_font_t *font,
void *font_data HB_UNUSED,
hb_codepoint_t glyph,
void *user_data HB_UNUSED)
{
if (font->has_glyph_h_advances_func_set ())
{
hb_position_t ret;
font->get_glyph_h_advances (1, &glyph, 0, &ret, 0);
return ret;
}
return font->parent_scale_x_distance (font->parent->get_glyph_h_advance (glyph));
}
static hb_position_t
hb_font_get_glyph_v_advance_nil (hb_font_t *font,
void *font_data HB_UNUSED,
hb_codepoint_t glyph HB_UNUSED,
void *user_data HB_UNUSED)
{
/* TODO use font_extents.ascender+descender */
return font->y_scale;
}
static hb_position_t
hb_font_get_glyph_v_advance_default (hb_font_t *font,
void *font_data HB_UNUSED,
hb_codepoint_t glyph,
void *user_data HB_UNUSED)
{
if (font->has_glyph_v_advances_func_set ())
{
hb_position_t ret;
font->get_glyph_v_advances (1, &glyph, 0, &ret, 0);
return ret;
}
return font->parent_scale_y_distance (font->parent->get_glyph_v_advance (glyph));
}
#define hb_font_get_glyph_h_advances_nil hb_font_get_glyph_h_advances_default
static void
hb_font_get_glyph_h_advances_default (hb_font_t* font,
void* font_data HB_UNUSED,
unsigned int count,
const hb_codepoint_t *first_glyph,
unsigned int glyph_stride,
hb_position_t *first_advance,
unsigned int advance_stride,
void *user_data HB_UNUSED)
{
if (font->has_glyph_h_advance_func_set ())
{
for (unsigned int i = 0; i < count; i++)
{
*first_advance = font->get_glyph_h_advance (*first_glyph);
first_glyph = &StructAtOffsetUnaligned<hb_codepoint_t> (first_glyph, glyph_stride);
first_advance = &StructAtOffsetUnaligned<hb_position_t> (first_advance, advance_stride);
}
return;
}
font->parent->get_glyph_h_advances (count,
first_glyph, glyph_stride,
first_advance, advance_stride);
for (unsigned int i = 0; i < count; i++)
{
*first_advance = font->parent_scale_x_distance (*first_advance);
first_advance = &StructAtOffsetUnaligned<hb_position_t> (first_advance, advance_stride);
}
}
#define hb_font_get_glyph_v_advances_nil hb_font_get_glyph_v_advances_default
static void
hb_font_get_glyph_v_advances_default (hb_font_t* font,
void* font_data HB_UNUSED,
unsigned int count,
const hb_codepoint_t *first_glyph,
unsigned int glyph_stride,
hb_position_t *first_advance,
unsigned int advance_stride,
void *user_data HB_UNUSED)
{
if (font->has_glyph_v_advance_func_set ())
{
for (unsigned int i = 0; i < count; i++)
{
*first_advance = font->get_glyph_v_advance (*first_glyph);
first_glyph = &StructAtOffsetUnaligned<hb_codepoint_t> (first_glyph, glyph_stride);
first_advance = &StructAtOffsetUnaligned<hb_position_t> (first_advance, advance_stride);
}
return;
}
font->parent->get_glyph_v_advances (count,
first_glyph, glyph_stride,
first_advance, advance_stride);
for (unsigned int i = 0; i < count; i++)
{
*first_advance = font->parent_scale_y_distance (*first_advance);
first_advance = &StructAtOffsetUnaligned<hb_position_t> (first_advance, advance_stride);
}
}
static hb_bool_t
hb_font_get_glyph_h_origin_nil (hb_font_t *font HB_UNUSED,
void *font_data HB_UNUSED,
hb_codepoint_t glyph HB_UNUSED,
hb_position_t *x,
hb_position_t *y,
void *user_data HB_UNUSED)
{
*x = *y = 0;
return true;
}
static hb_bool_t
hb_font_get_glyph_h_origin_default (hb_font_t *font,
void *font_data HB_UNUSED,
hb_codepoint_t glyph,
hb_position_t *x,
hb_position_t *y,
void *user_data HB_UNUSED)
{
hb_bool_t ret = font->parent->get_glyph_h_origin (glyph, x, y);
if (ret)
font->parent_scale_position (x, y);
return ret;
}
static hb_bool_t
hb_font_get_glyph_v_origin_nil (hb_font_t *font HB_UNUSED,
void *font_data HB_UNUSED,
hb_codepoint_t glyph HB_UNUSED,
hb_position_t *x,
hb_position_t *y,
void *user_data HB_UNUSED)
{
*x = *y = 0;
return false;
}
static hb_bool_t
hb_font_get_glyph_v_origin_default (hb_font_t *font,
void *font_data HB_UNUSED,
hb_codepoint_t glyph,
hb_position_t *x,
hb_position_t *y,
void *user_data HB_UNUSED)
{
hb_bool_t ret = font->parent->get_glyph_v_origin (glyph, x, y);
if (ret)
font->parent_scale_position (x, y);
return ret;
}
static hb_position_t
hb_font_get_glyph_h_kerning_nil (hb_font_t *font HB_UNUSED,
void *font_data HB_UNUSED,
hb_codepoint_t left_glyph HB_UNUSED,
hb_codepoint_t right_glyph HB_UNUSED,
void *user_data HB_UNUSED)
{
return 0;
}
static hb_position_t
hb_font_get_glyph_h_kerning_default (hb_font_t *font,
void *font_data HB_UNUSED,
hb_codepoint_t left_glyph,
hb_codepoint_t right_glyph,
void *user_data HB_UNUSED)
{
return font->parent_scale_x_distance (font->parent->get_glyph_h_kerning (left_glyph, right_glyph));
}
#ifndef HB_DISABLE_DEPRECATED
static hb_position_t
hb_font_get_glyph_v_kerning_nil (hb_font_t *font HB_UNUSED,
void *font_data HB_UNUSED,
hb_codepoint_t top_glyph HB_UNUSED,
hb_codepoint_t bottom_glyph HB_UNUSED,
void *user_data HB_UNUSED)
{
return 0;
}
static hb_position_t
hb_font_get_glyph_v_kerning_default (hb_font_t *font,
void *font_data HB_UNUSED,
hb_codepoint_t top_glyph,
hb_codepoint_t bottom_glyph,
void *user_data HB_UNUSED)
{
return font->parent_scale_y_distance (font->parent->get_glyph_v_kerning (top_glyph, bottom_glyph));
}
#endif
static hb_bool_t
hb_font_get_glyph_extents_nil (hb_font_t *font HB_UNUSED,
void *font_data HB_UNUSED,
hb_codepoint_t glyph HB_UNUSED,
hb_glyph_extents_t *extents,
void *user_data HB_UNUSED)
{
memset (extents, 0, sizeof (*extents));
return false;
}
static hb_bool_t
hb_font_get_glyph_extents_default (hb_font_t *font,
void *font_data HB_UNUSED,
hb_codepoint_t glyph,
hb_glyph_extents_t *extents,
void *user_data HB_UNUSED)
{
hb_bool_t ret = font->parent->get_glyph_extents (glyph, extents);
if (ret) {
font->parent_scale_position (&extents->x_bearing, &extents->y_bearing);
font->parent_scale_distance (&extents->width, &extents->height);
}
return ret;
}
static hb_bool_t
hb_font_get_glyph_contour_point_nil (hb_font_t *font HB_UNUSED,
void *font_data HB_UNUSED,
hb_codepoint_t glyph HB_UNUSED,
unsigned int point_index HB_UNUSED,
hb_position_t *x,
hb_position_t *y,
void *user_data HB_UNUSED)
{
*x = *y = 0;
return false;
}
static hb_bool_t
hb_font_get_glyph_contour_point_default (hb_font_t *font,
void *font_data HB_UNUSED,
hb_codepoint_t glyph,
unsigned int point_index,
hb_position_t *x,
hb_position_t *y,
void *user_data HB_UNUSED)
{
hb_bool_t ret = font->parent->get_glyph_contour_point (glyph, point_index, x, y);
if (ret)
font->parent_scale_position (x, y);
return ret;
}
static hb_bool_t
hb_font_get_glyph_name_nil (hb_font_t *font HB_UNUSED,
void *font_data HB_UNUSED,
hb_codepoint_t glyph HB_UNUSED,
char *name,
unsigned int size,
void *user_data HB_UNUSED)
{
if (size) *name = '\0';
return false;
}
static hb_bool_t
hb_font_get_glyph_name_default (hb_font_t *font,
void *font_data HB_UNUSED,
hb_codepoint_t glyph,
char *name,
unsigned int size,
void *user_data HB_UNUSED)
{
return font->parent->get_glyph_name (glyph, name, size);
}
static hb_bool_t
hb_font_get_glyph_from_name_nil (hb_font_t *font HB_UNUSED,
void *font_data HB_UNUSED,
const char *name HB_UNUSED,
int len HB_UNUSED, /* -1 means nul-terminated */
hb_codepoint_t *glyph,
void *user_data HB_UNUSED)
{
*glyph = 0;
return false;
}
static hb_bool_t
hb_font_get_glyph_from_name_default (hb_font_t *font,
void *font_data HB_UNUSED,
const char *name,
int len, /* -1 means nul-terminated */
hb_codepoint_t *glyph,
void *user_data HB_UNUSED)
{
return font->parent->get_glyph_from_name (name, len, glyph);
}
static void
hb_font_get_glyph_shape_nil (hb_font_t *font HB_UNUSED,
void *font_data HB_UNUSED,
hb_codepoint_t glyph,
hb_draw_funcs_t *draw_funcs,
void *draw_data,
void *user_data HB_UNUSED)
{
}
typedef struct hb_font_get_glyph_shape_default_adaptor_t {
hb_draw_funcs_t *draw_funcs;
void *draw_data;
float x_scale;
float y_scale;
} hb_font_get_glyph_shape_default_adaptor_t;
static void
hb_draw_move_to_default (hb_draw_funcs_t *dfuncs HB_UNUSED,
void *draw_data,
hb_draw_state_t *st,
float to_x, float to_y,
void *user_data HB_UNUSED)
{
hb_font_get_glyph_shape_default_adaptor_t *adaptor = (hb_font_get_glyph_shape_default_adaptor_t *) draw_data;
float x_scale = adaptor->x_scale;
float y_scale = adaptor->y_scale;
adaptor->draw_funcs->emit_move_to (adaptor->draw_data, *st,
x_scale * to_x, y_scale * to_y);
}
static void
hb_draw_line_to_default (hb_draw_funcs_t *dfuncs HB_UNUSED, void *draw_data,
hb_draw_state_t *st,
float to_x, float to_y,
void *user_data HB_UNUSED)
{
hb_font_get_glyph_shape_default_adaptor_t *adaptor = (hb_font_get_glyph_shape_default_adaptor_t *) draw_data;
float x_scale = adaptor->x_scale;
float y_scale = adaptor->y_scale;
st->current_x *= x_scale;
st->current_y *= y_scale;
adaptor->draw_funcs->emit_line_to (adaptor->draw_data, *st,
x_scale * to_x, y_scale * to_y);
}
static void
hb_draw_quadratic_to_default (hb_draw_funcs_t *dfuncs HB_UNUSED, void *draw_data,
hb_draw_state_t *st,
float control_x, float control_y,
float to_x, float to_y,
void *user_data HB_UNUSED)
{
hb_font_get_glyph_shape_default_adaptor_t *adaptor = (hb_font_get_glyph_shape_default_adaptor_t *) draw_data;
float x_scale = adaptor->x_scale;
float y_scale = adaptor->y_scale;
st->current_x *= x_scale;
st->current_y *= y_scale;
adaptor->draw_funcs->emit_quadratic_to (adaptor->draw_data, *st,
x_scale * control_x, y_scale * control_y,
x_scale * to_x, y_scale * to_y);
}
static void
hb_draw_cubic_to_default (hb_draw_funcs_t *dfuncs HB_UNUSED, void *draw_data,
hb_draw_state_t *st,
float control1_x, float control1_y,
float control2_x, float control2_y,
float to_x, float to_y,
void *user_data HB_UNUSED)
{
hb_font_get_glyph_shape_default_adaptor_t *adaptor = (hb_font_get_glyph_shape_default_adaptor_t *) draw_data;
float x_scale = adaptor->x_scale;
float y_scale = adaptor->y_scale;
st->current_x *= x_scale;
st->current_y *= y_scale;
adaptor->draw_funcs->emit_cubic_to (adaptor->draw_data, *st,
x_scale * control1_x, y_scale * control1_y,
x_scale * control2_x, y_scale * control2_y,
x_scale * to_x, y_scale * to_y);
}
static void
hb_draw_close_path_default (hb_draw_funcs_t *dfuncs HB_UNUSED, void *draw_data,
hb_draw_state_t *st,
void *user_data HB_UNUSED)
{
hb_font_get_glyph_shape_default_adaptor_t *adaptor = (hb_font_get_glyph_shape_default_adaptor_t *) draw_data;
adaptor->draw_funcs->emit_close_path (adaptor->draw_data, *st);
}
static const hb_draw_funcs_t _hb_draw_funcs_default = {
HB_OBJECT_HEADER_STATIC,
{
#define HB_DRAW_FUNC_IMPLEMENT(name) hb_draw_##name##_default,
HB_DRAW_FUNCS_IMPLEMENT_CALLBACKS
#undef HB_DRAW_FUNC_IMPLEMENT
}
};
static void
hb_font_get_glyph_shape_default (hb_font_t *font,
void *font_data HB_UNUSED,
hb_codepoint_t glyph,
hb_draw_funcs_t *draw_funcs,
void *draw_data,
void *user_data HB_UNUSED)
{
hb_font_get_glyph_shape_default_adaptor_t adaptor = {
draw_funcs,
draw_data,
(float) font->x_scale / (float) font->parent->x_scale,
(float) font->y_scale / (float) font->parent->y_scale
};
font->parent->get_glyph_shape (glyph,
const_cast<hb_draw_funcs_t *> (&_hb_draw_funcs_default),
&adaptor);
}
DEFINE_NULL_INSTANCE (hb_font_funcs_t) =
{
HB_OBJECT_HEADER_STATIC,
nullptr,
nullptr,
{
{
#define HB_FONT_FUNC_IMPLEMENT(name) hb_font_get_##name##_nil,
HB_FONT_FUNCS_IMPLEMENT_CALLBACKS
#undef HB_FONT_FUNC_IMPLEMENT
}
}
};
static const hb_font_funcs_t _hb_font_funcs_default = {
HB_OBJECT_HEADER_STATIC,
nullptr,
nullptr,
{
{
#define HB_FONT_FUNC_IMPLEMENT(name) hb_font_get_##name##_default,
HB_FONT_FUNCS_IMPLEMENT_CALLBACKS
#undef HB_FONT_FUNC_IMPLEMENT
}
}
};
/**
* hb_font_funcs_create:
*
* Creates a new #hb_font_funcs_t structure of font functions.
*
* Return value: (transfer full): The font-functions structure
*
* Since: 0.9.2
**/
hb_font_funcs_t *
hb_font_funcs_create ()
{
hb_font_funcs_t *ffuncs;
if (!(ffuncs = hb_object_create<hb_font_funcs_t> ()))
return hb_font_funcs_get_empty ();
ffuncs->get = _hb_font_funcs_default.get;
return ffuncs;
}
/**
* hb_font_funcs_get_empty:
*
* Fetches an empty font-functions structure.
*
* Return value: (transfer full): The font-functions structure
*
* Since: 0.9.2
**/
hb_font_funcs_t *
hb_font_funcs_get_empty ()
{
return const_cast<hb_font_funcs_t *> (&_hb_font_funcs_default);
}
/**
* hb_font_funcs_reference: (skip)
* @ffuncs: The font-functions structure
*
* Increases the reference count on a font-functions structure.
*
* Return value: The font-functions structure
*
* Since: 0.9.2
**/
hb_font_funcs_t *
hb_font_funcs_reference (hb_font_funcs_t *ffuncs)
{
return hb_object_reference (ffuncs);
}
/**
* hb_font_funcs_destroy: (skip)
* @ffuncs: The font-functions structure
*
* Decreases the reference count on a font-functions structure. When
* the reference count reaches zero, the font-functions structure is
* destroyed, freeing all memory.
*
* Since: 0.9.2
**/
void
hb_font_funcs_destroy (hb_font_funcs_t *ffuncs)
{
if (!hb_object_destroy (ffuncs)) return;
if (ffuncs->destroy)
{
#define HB_FONT_FUNC_IMPLEMENT(name) if (ffuncs->destroy->name) \
ffuncs->destroy->name (!ffuncs->user_data ? nullptr : ffuncs->user_data->name);
HB_FONT_FUNCS_IMPLEMENT_CALLBACKS
#undef HB_FONT_FUNC_IMPLEMENT
}
hb_free (ffuncs->destroy);
hb_free (ffuncs->user_data);
hb_free (ffuncs);
}
/**
* hb_font_funcs_set_user_data: (skip)
* @ffuncs: The font-functions structure
* @key: The user-data key to set
* @data: A pointer to the user data set
* @destroy: (nullable): A callback to call when @data is not needed anymore
* @replace: Whether to replace an existing data with the same key
*
* Attaches a user-data key/data pair to the specified font-functions structure.
*
* Return value: `true` if success, `false` otherwise
*
* Since: 0.9.2
**/
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 /* May be NULL. */,
hb_bool_t replace)
{
return hb_object_set_user_data (ffuncs, key, data, destroy, replace);
}
/**
* hb_font_funcs_get_user_data: (skip)
* @ffuncs: The font-functions structure
* @key: The user-data key to query
*
* Fetches the user data associated with the specified key,
* attached to the specified font-functions structure.
*
* Return value: (transfer none): A pointer to the user data
*
* Since: 0.9.2
**/
void *
hb_font_funcs_get_user_data (const hb_font_funcs_t *ffuncs,
hb_user_data_key_t *key)
{
return hb_object_get_user_data (ffuncs, key);
}
/**
* hb_font_funcs_make_immutable:
* @ffuncs: The font-functions structure
*
* Makes a font-functions structure immutable.
*
* Since: 0.9.2
**/
void
hb_font_funcs_make_immutable (hb_font_funcs_t *ffuncs)
{
if (hb_object_is_immutable (ffuncs))
return;
hb_object_make_immutable (ffuncs);
}
/**
* hb_font_funcs_is_immutable:
* @ffuncs: The font-functions structure
*
* Tests whether a font-functions structure is immutable.
*
* Return value: `true` if @ffuncs is immutable, `false` otherwise
*
* Since: 0.9.2
**/
hb_bool_t
hb_font_funcs_is_immutable (hb_font_funcs_t *ffuncs)
{
return hb_object_is_immutable (ffuncs);
}
#define HB_FONT_FUNC_IMPLEMENT(name) \
\
void \
hb_font_funcs_set_##name##_func (hb_font_funcs_t *ffuncs, \
hb_font_get_##name##_func_t func, \
void *user_data, \
hb_destroy_func_t destroy) \
{ \
if (hb_object_is_immutable (ffuncs)) \
goto fail; \
\
if (!func) \
{ \
if (destroy) \
destroy (user_data); \
destroy = nullptr; \
user_data = nullptr; \
} \
\
if (ffuncs->destroy && ffuncs->destroy->name) \
ffuncs->destroy->name (!ffuncs->user_data ? nullptr : ffuncs->user_data->name); \
\
if (user_data && !ffuncs->user_data) \
{ \
ffuncs->user_data = (decltype (ffuncs->user_data)) hb_calloc (1, sizeof (*ffuncs->user_data)); \
if (unlikely (!ffuncs->user_data)) \
goto fail; \
} \
if (destroy && !ffuncs->destroy) \
{ \
ffuncs->destroy = (decltype (ffuncs->destroy)) hb_calloc (1, sizeof (*ffuncs->destroy)); \
if (unlikely (!ffuncs->destroy)) \
goto fail; \
} \
\
if (func) { \
ffuncs->get.f.name = func; \
if (ffuncs->user_data) \
ffuncs->user_data->name = user_data; \
if (ffuncs->destroy) \
ffuncs->destroy->name = destroy; \
} else { \
ffuncs->get.f.name = hb_font_get_##name##_default; \
if (ffuncs->user_data) \
ffuncs->user_data->name = nullptr; \
if (ffuncs->destroy) \
ffuncs->destroy->name = nullptr; \
} \
return; \
\
fail: \
if (destroy) \
destroy (user_data); \
}
HB_FONT_FUNCS_IMPLEMENT_CALLBACKS
#undef HB_FONT_FUNC_IMPLEMENT
bool
hb_font_t::has_func_set (unsigned int i)
{
return this->klass->get.array[i] != _hb_font_funcs_default.get.array[i];
}
bool
hb_font_t::has_func (unsigned int i)
{
return has_func_set (i) ||
(parent && parent != &_hb_Null_hb_font_t && parent->has_func (i));
}
/* Public getters */
/**
* hb_font_get_h_extents:
* @font: #hb_font_t to work upon
* @extents: (out): The font extents retrieved
*
* Fetches the extents for a specified font, for horizontal
* text segments.
*
* Return value: `true` if data found, `false` otherwise
*
* Since: 1.1.3
**/
hb_bool_t
hb_font_get_h_extents (hb_font_t *font,
hb_font_extents_t *extents)
{
return font->get_font_h_extents (extents);
}
/**
* hb_font_get_v_extents:
* @font: #hb_font_t to work upon
* @extents: (out): The font extents retrieved
*
* Fetches the extents for a specified font, for vertical
* text segments.
*
* Return value: `true` if data found, `false` otherwise
*
* Since: 1.1.3
**/
hb_bool_t
hb_font_get_v_extents (hb_font_t *font,
hb_font_extents_t *extents)
{
return font->get_font_v_extents (extents);
}
/**
* hb_font_get_glyph:
* @font: #hb_font_t to work upon
* @unicode: The Unicode code point to query
* @variation_selector: A variation-selector code point
* @glyph: (out): The glyph ID retrieved
*
* Fetches the glyph ID for a Unicode code point in the specified
* font, with an optional variation selector.
*
* If @variation_selector is 0, calls hb_font_get_nominal_glyph();
* otherwise calls hb_font_get_variation_glyph().
*
* Return value: `true` if data found, `false` otherwise
*
* Since: 0.9.2
**/
hb_bool_t
hb_font_get_glyph (hb_font_t *font,
hb_codepoint_t unicode,
hb_codepoint_t variation_selector,
hb_codepoint_t *glyph)
{
if (unlikely (variation_selector))
return font->get_variation_glyph (unicode, variation_selector, glyph);
return font->get_nominal_glyph (unicode, glyph);
}
/**
* hb_font_get_nominal_glyph:
* @font: #hb_font_t to work upon
* @unicode: The Unicode code point to query
* @glyph: (out): The glyph ID retrieved
*
* Fetches the nominal glyph ID for a Unicode code point in the
* specified font.
*
* This version of the function should not be used to fetch glyph IDs
* for code points modified by variation selectors. For variation-selector
* support, user hb_font_get_variation_glyph() or use hb_font_get_glyph().
*
* Return value: `true` if data found, `false` otherwise
*
* Since: 1.2.3
**/
hb_bool_t
hb_font_get_nominal_glyph (hb_font_t *font,
hb_codepoint_t unicode,
hb_codepoint_t *glyph)
{
return font->get_nominal_glyph (unicode, glyph);
}
/**
* hb_font_get_nominal_glyphs:
* @font: #hb_font_t to work upon
* @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
*
* Fetches 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
*
* Since: 2.6.3
**/
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)
{
return font->get_nominal_glyphs (count,
first_unicode, unicode_stride,
first_glyph, glyph_stride);
}
/**
* hb_font_get_variation_glyph:
* @font: #hb_font_t to work upon
* @unicode: The Unicode code point to query
* @variation_selector: The variation-selector code point to query
* @glyph: (out): The glyph ID retrieved
*
* Fetches the glyph ID for a Unicode code point when followed by
* by the specified variation-selector code point, in the specified
* font.
*
* Return value: `true` if data found, `false` otherwise
*
* Since: 1.2.3
**/
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)
{
return font->get_variation_glyph (unicode, variation_selector, glyph);
}
/**
* hb_font_get_glyph_h_advance:
* @font: #hb_font_t to work upon
* @glyph: The glyph ID to query
*
* Fetches the advance for a glyph ID in the specified font,
* for horizontal text segments.
*
* Return value: The advance of @glyph within @font
*
* Since: 0.9.2
**/
hb_position_t
hb_font_get_glyph_h_advance (hb_font_t *font,
hb_codepoint_t glyph)
{
return font->get_glyph_h_advance (glyph);
}
/**
* hb_font_get_glyph_v_advance:
* @font: #hb_font_t to work upon
* @glyph: The glyph ID to query
*
* Fetches the advance for a glyph ID in the specified font,
* for vertical text segments.
*
* Return value: The advance of @glyph within @font
*
* Since: 0.9.2
**/
hb_position_t
hb_font_get_glyph_v_advance (hb_font_t *font,
hb_codepoint_t glyph)
{
return font->get_glyph_v_advance (glyph);
}
/**
* hb_font_get_glyph_h_advances:
* @font: #hb_font_t to work upon
* @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
*
* Fetches the advances for a sequence of glyph IDs in the specified
* font, for horizontal text segments.
*
* Since: 1.8.6
**/
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)
{
font->get_glyph_h_advances (count, first_glyph, glyph_stride, first_advance, advance_stride);
}
/**
* hb_font_get_glyph_v_advances:
* @font: #hb_font_t to work upon
* @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: (out): The stride between successive advances
*
* Fetches the advances for a sequence of glyph IDs in the specified
* font, for vertical text segments.
*
* Since: 1.8.6
**/
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)
{
font->get_glyph_v_advances (count, first_glyph, glyph_stride, first_advance, advance_stride);
}
/**
* hb_font_get_glyph_h_origin:
* @font: #hb_font_t to work upon
* @glyph: The glyph ID to query
* @x: (out): The X coordinate of the origin
* @y: (out): The Y coordinate of the origin
*
* Fetches the (X,Y) coordinates of the origin for a glyph ID
* in the specified font, for horizontal text segments.
*
* Return value: `true` if data found, `false` otherwise
*
* Since: 0.9.2
**/
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)
{
return font->get_glyph_h_origin (glyph, x, y);
}
/**
* hb_font_get_glyph_v_origin:
* @font: #hb_font_t to work upon
* @glyph: The glyph ID to query
* @x: (out): The X coordinate of the origin
* @y: (out): The Y coordinate of the origin
*
* Fetches the (X,Y) coordinates of the origin for a glyph ID
* in the specified font, for vertical text segments.
*
* Return value: `true` if data found, `false` otherwise
*
* Since: 0.9.2
**/
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)
{
return font->get_glyph_v_origin (glyph, x, y);
}
/**
* hb_font_get_glyph_h_kerning:
* @font: #hb_font_t to work upon
* @left_glyph: The glyph ID of the left glyph in the glyph pair
* @right_glyph: The glyph ID of the right glyph in the glyph pair
*
* Fetches the kerning-adjustment value for a glyph-pair in
* the specified font, for horizontal text segments.
*
* <note>It handles legacy kerning only (as returned by the corresponding
* #hb_font_funcs_t function).</note>
*
* Return value: The kerning adjustment value
*
* Since: 0.9.2
**/
hb_position_t
hb_font_get_glyph_h_kerning (hb_font_t *font,
hb_codepoint_t left_glyph,
hb_codepoint_t right_glyph)
{
return font->get_glyph_h_kerning (left_glyph, right_glyph);
}
#ifndef HB_DISABLE_DEPRECATED
/**
* hb_font_get_glyph_v_kerning:
* @font: #hb_font_t to work upon
* @top_glyph: The glyph ID of the top glyph in the glyph pair
* @bottom_glyph: The glyph ID of the bottom glyph in the glyph pair
*
* Fetches the kerning-adjustment value for a glyph-pair in
* the specified font, for vertical text segments.
*
* <note>It handles legacy kerning only (as returned by the corresponding
* #hb_font_funcs_t function).</note>
*
* Return value: The kerning adjustment value
*
* Since: 0.9.2
* Deprecated: 2.0.0
**/
hb_position_t
hb_font_get_glyph_v_kerning (hb_font_t *font,
hb_codepoint_t top_glyph,
hb_codepoint_t bottom_glyph)
{
return font->get_glyph_v_kerning (top_glyph, bottom_glyph);
}
#endif
/**
* hb_font_get_glyph_extents:
* @font: #hb_font_t to work upon
* @glyph: The glyph ID to query
* @extents: (out): The #hb_glyph_extents_t retrieved
*
* Fetches the #hb_glyph_extents_t data for a glyph ID
* in the specified font.
*
* Return value: `true` if data found, `false` otherwise
*
* Since: 0.9.2
**/
hb_bool_t
hb_font_get_glyph_extents (hb_font_t *font,
hb_codepoint_t glyph,
hb_glyph_extents_t *extents)
{
return font->get_glyph_extents (glyph, extents);
}
/**
* hb_font_get_glyph_contour_point:
* @font: #hb_font_t to work upon
* @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
*
* Fetches the (x,y) coordinates of a specified contour-point index
* in the specified glyph, within the specified font.
*
* Return value: `true` if data found, `false` otherwise
*
* Since: 0.9.2
**/
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)
{
return font->get_glyph_contour_point (glyph, point_index, x, y);
}
/**
* hb_font_get_glyph_name:
* @font: #hb_font_t to work upon
* @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
*
* Fetches the glyph-name string for a glyph ID in the specified @font.
*
* Return value: `true` if data found, `false` otherwise
*
* Since: 0.9.2
**/
hb_bool_t
hb_font_get_glyph_name (hb_font_t *font,
hb_codepoint_t glyph,
char *name,
unsigned int size)
{
return font->get_glyph_name (glyph, name, size);
}
/**
* hb_font_get_glyph_from_name:
* @font: #hb_font_t to work upon
* @name: (array length=len): The name string to query
* @len: The length of the name queried
* @glyph: (out): The glyph ID retrieved
*
* Fetches the glyph ID that corresponds to a name string in the specified @font.
*
* <note>Note: @len == -1 means the name string is null-terminated.</note>
*
* Return value: `true` if data found, `false` otherwise
*
* Since: 0.9.2
**/
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)
{
return font->get_glyph_from_name (name, len, glyph);
}
/**
* hb_font_get_glyph_shape:
* @font: #hb_font_t to work upon
* @glyph: : The glyph ID
* @dfuncs: #hb_draw_funcs_t to draw to
* @draw_data: User data to pass to draw callbacks
*
* Fetches the glyph shape that corresponds to a glyph in the specified @font.
* The shape is returned by way of calls to the callsbacks of the @dfuncs
* objects, with @draw_data passed to them.
*
* Since: 4.0.0
**/
void
hb_font_get_glyph_shape (hb_font_t *font,
hb_codepoint_t glyph,
hb_draw_funcs_t *dfuncs, void *draw_data)
{
font->get_glyph_shape (glyph, dfuncs, draw_data);
}
/* A bit higher-level, and with fallback */
/**
* hb_font_get_extents_for_direction:
* @font: #hb_font_t to work upon
* @direction: The direction of the text segment
* @extents: (out): The #hb_font_extents_t retrieved
*
* Fetches the extents for a font in a text segment of the
* specified direction.
*
* Calls the appropriate direction-specific variant (horizontal
* or vertical) depending on the value of @direction.
*
* Since: 1.1.3
**/
void
hb_font_get_extents_for_direction (hb_font_t *font,
hb_direction_t direction,
hb_font_extents_t *extents)
{
font->get_extents_for_direction (direction, extents);
}
/**
* hb_font_get_glyph_advance_for_direction:
* @font: #hb_font_t to work upon
* @glyph: The glyph ID to query
* @direction: The direction of the text segment
* @x: (out): The horizontal advance retrieved
* @y: (out): The vertical advance retrieved
*
* Fetches the advance for a glyph ID from the specified font,
* in a text segment of the specified direction.
*
* Calls the appropriate direction-specific variant (horizontal
* or vertical) depending on the value of @direction.
*
* Since: 0.9.2
**/
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)
{
font->get_glyph_advance_for_direction (glyph, direction, x, y);
}
/**
* hb_font_get_glyph_advances_for_direction:
* @font: #hb_font_t to work upon
* @direction: The direction of the text segment
* @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: (out): The stride between successive advances
*
* Fetches the advances for a sequence of glyph IDs in the specified
* font, in a text segment of the specified direction.
*
* Calls the appropriate direction-specific variant (horizontal
* or vertical) depending on the value of @direction.
*
* Since: 1.8.6
**/
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)
{
font->get_glyph_advances_for_direction (direction, count, first_glyph, glyph_stride, first_advance, advance_stride);
}
/**
* hb_font_get_glyph_origin_for_direction:
* @font: #hb_font_t to work upon
* @glyph: The glyph ID to query
* @direction: The direction of the text segment
* @x: (out): The X coordinate retrieved for the origin
* @y: (out): The Y coordinate retrieved for the origin
*
* Fetches the (X,Y) coordinates of the origin for a glyph in
* the specified font.
*
* Calls the appropriate direction-specific variant (horizontal
* or vertical) depending on the value of @direction.
*
* Since: 0.9.2
**/
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)
{
return font->get_glyph_origin_for_direction (glyph, direction, x, y);
}
/**
* hb_font_add_glyph_origin_for_direction:
* @font: #hb_font_t to work upon
* @glyph: The glyph ID to query
* @direction: The direction of the text segment
* @x: (inout): Input = The original X coordinate
* Output = The X coordinate plus the X-coordinate of the origin
* @y: (inout): Input = The original Y coordinate
* Output = The Y coordinate plus the Y-coordinate of the origin
*
* Adds the origin coordinates to an (X,Y) point coordinate, in
* the specified glyph ID in the specified font.
*
* Calls the appropriate direction-specific variant (horizontal
* or vertical) depending on the value of @direction.
*
* Since: 0.9.2
**/
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)
{
return font->add_glyph_origin_for_direction (glyph, direction, x, y);
}
/**
* hb_font_subtract_glyph_origin_for_direction:
* @font: #hb_font_t to work upon
* @glyph: The glyph ID to query
* @direction: The direction of the text segment
* @x: (inout): Input = The original X coordinate
* Output = The X coordinate minus the X-coordinate of the origin
* @y: (inout): Input = The original Y coordinate
* Output = The Y coordinate minus the Y-coordinate of the origin
*
* Subtracts the origin coordinates from an (X,Y) point coordinate,
* in the specified glyph ID in the specified font.
*
* Calls the appropriate direction-specific variant (horizontal
* or vertical) depending on the value of @direction.
*
* Since: 0.9.2
**/
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)
{
return font->subtract_glyph_origin_for_direction (glyph, direction, x, y);
}
/**
* hb_font_get_glyph_kerning_for_direction:
* @font: #hb_font_t to work upon
* @first_glyph: The glyph ID of the first glyph in the glyph pair to query
* @second_glyph: The glyph ID of the second glyph in the glyph pair to query
* @direction: The direction of the text segment
* @x: (out): The horizontal kerning-adjustment value retrieved
* @y: (out): The vertical kerning-adjustment value retrieved
*
* Fetches the kerning-adjustment value for a glyph-pair in the specified font.
*
* Calls the appropriate direction-specific variant (horizontal
* or vertical) depending on the value of @direction.
*
* Since: 0.9.2
**/
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)
{
return font->get_glyph_kerning_for_direction (first_glyph, second_glyph, direction, x, y);
}
/**
* hb_font_get_glyph_extents_for_origin:
* @font: #hb_font_t to work upon
* @glyph: The glyph ID to query
* @direction: The direction of the text segment
* @extents: (out): The #hb_glyph_extents_t retrieved
*
* Fetches the #hb_glyph_extents_t data for a glyph ID
* in the specified font, with respect to the origin in
* a text segment in the specified direction.
*
* Calls the appropriate direction-specific variant (horizontal
* or vertical) depending on the value of @direction.
*
* Return value: `true` if data found, `false` otherwise
*
* Since: 0.9.2
**/
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)
{
return font->get_glyph_extents_for_origin (glyph, direction, extents);
}
/**
* hb_font_get_glyph_contour_point_for_origin:
* @font: #hb_font_t to work upon
* @glyph: The glyph ID to query
* @point_index: The contour-point index to query
* @direction: The direction of the text segment
* @x: (out): The X value retrieved for the contour point
* @y: (out): The Y value retrieved for the contour point
*
* Fetches the (X,Y) coordinates of a specified contour-point index
* in the specified glyph ID in the specified font, with respect
* to the origin in a text segment in the specified direction.
*
* Calls the appropriate direction-specific variant (horizontal
* or vertical) depending on the value of @direction.
*
* Return value: `true` if data found, `false` otherwise
*
* Since: 0.9.2
**/
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)
{
return font->get_glyph_contour_point_for_origin (glyph, point_index, direction, x, y);
}
/**
* hb_font_glyph_to_string:
* @font: #hb_font_t to work upon
* @glyph: The glyph ID to query
* @s: (out) (array length=size): The string containing the glyph name
* @size: Length of string @s
*
* Fetches the name of the specified glyph ID in @font and returns
* it in string @s.
*
* If the glyph ID has no name in @font, a string of the form `gidDDD` is
* generated, with `DDD` being the glyph ID.
*
* Since: 0.9.2
**/
void
hb_font_glyph_to_string (hb_font_t *font,
hb_codepoint_t glyph,
char *s,
unsigned int size)
{
font->glyph_to_string (glyph, s, size);
}
/**
* hb_font_glyph_from_string:
* @font: #hb_font_t to work upon
* @s: (array length=len) (element-type uint8_t): string to query
* @len: The length of the string @s
* @glyph: (out): The glyph ID corresponding to the string requested
*
* Fetches the glyph ID from @font that matches the specified string.
* Strings of the format `gidDDD` or `uniUUUU` are parsed automatically.
*
* <note>Note: @len == -1 means the string is null-terminated.</note>
*
* Return value: `true` if data found, `false` otherwise
*
* Since: 0.9.2
**/
hb_bool_t
hb_font_glyph_from_string (hb_font_t *font,
const char *s,
int len,
hb_codepoint_t *glyph)
{
return font->glyph_from_string (s, len, glyph);
}
/*
* hb_font_t
*/
DEFINE_NULL_INSTANCE (hb_font_t) =
{
HB_OBJECT_HEADER_STATIC,
0, /* serial */
0, /* serial_coords */
nullptr, /* parent */
const_cast<hb_face_t *> (&_hb_Null_hb_face_t),
1000, /* x_scale */
1000, /* y_scale */
0., /* slant */
0., /* slant_xy; */
1.f, /* x_multf */
1.f, /* y_multf */
1<<16, /* x_mult */
1<<16, /* y_mult */
0, /* x_ppem */
0, /* y_ppem */
0, /* ptem */
0, /* num_coords */
nullptr, /* coords */
nullptr, /* design_coords */
const_cast<hb_font_funcs_t *> (&_hb_Null_hb_font_funcs_t),
/* Zero for the rest is fine. */
};
static hb_font_t *
_hb_font_create (hb_face_t *face)
{
hb_font_t *font;
if (unlikely (!face))
face = hb_face_get_empty ();
if (!(font = hb_object_create<hb_font_t> ()))
return hb_font_get_empty ();
hb_face_make_immutable (face);
font->parent = hb_font_get_empty ();
font->face = hb_face_reference (face);
font->klass = hb_font_funcs_get_empty ();
font->data.init0 (font);
font->x_scale = font->y_scale = face->get_upem ();
font->x_multf = font->y_multf = 1.f;
font->x_mult = font->y_mult = 1 << 16;
return font;
}
/**
* hb_font_create:
* @face: a face.
*
* Constructs a new font object from the specified face.
*
* <note>Note: If @face's index value (as passed to hb_face_create()
* has non-zero top 16-bits, those bits minus one are passed to
* hb_font_set_var_named_instance(), effectively loading a named-instance
* of a variable font, instead of the default-instance. This allows
* specifying which named-instance to load by default when creating the
* face.</note>
*
* Return value: (transfer full): The new font object
*
* Since: 0.9.2
**/
hb_font_t *
hb_font_create (hb_face_t *face)
{
hb_font_t *font = _hb_font_create (face);
#ifndef HB_NO_OT_FONT
/* Install our in-house, very lightweight, funcs. */
hb_ot_font_set_funcs (font);
#endif
#ifndef HB_NO_VAR
if (face && face->index >> 16)
hb_font_set_var_named_instance (font, (face->index >> 16) - 1);
#endif
return font;
}
static void
_hb_font_adopt_var_coords (hb_font_t *font,
int *coords, /* 2.14 normalized */
float *design_coords,
unsigned int coords_length)
{
hb_free (font->coords);
hb_free (font->design_coords);
font->coords = coords;
font->design_coords = design_coords;
font->num_coords = coords_length;
font->mults_changed (); // Easiest to call this to drop cached data
}
/**
* hb_font_create_sub_font:
* @parent: The parent font object
*
* Constructs a sub-font font object from the specified @parent font,
* replicating the parent's properties.
*
* Return value: (transfer full): The new sub-font font object
*
* Since: 0.9.2
**/
hb_font_t *
hb_font_create_sub_font (hb_font_t *parent)
{
if (unlikely (!parent))
parent = hb_font_get_empty ();
hb_font_t *font = _hb_font_create (parent->face);
if (unlikely (hb_object_is_immutable (font)))
return font;
font->parent = hb_font_reference (parent);
font->x_scale = parent->x_scale;
font->y_scale = parent->y_scale;
font->slant = parent->slant;
font->x_ppem = parent->x_ppem;
font->y_ppem = parent->y_ppem;
font->ptem = parent->ptem;
unsigned int num_coords = parent->num_coords;
if (num_coords)
{
int *coords = (int *) hb_calloc (num_coords, sizeof (parent->coords[0]));
float *design_coords = (float *) hb_calloc (num_coords, sizeof (parent->design_coords[0]));
if (likely (coords && design_coords))
{
memcpy (coords, parent->coords, num_coords * sizeof (parent->coords[0]));
memcpy (design_coords, parent->design_coords, num_coords * sizeof (parent->design_coords[0]));
_hb_font_adopt_var_coords (font, coords, design_coords, num_coords);
}
else
{
hb_free (coords);
hb_free (design_coords);
}
}
font->mults_changed ();
return font;
}
/**
* hb_font_get_empty:
*
* Fetches the empty font object.
*
* Return value: (transfer full): The empty font object
*
* Since: 0.9.2
**/
hb_font_t *
hb_font_get_empty ()
{
return const_cast<hb_font_t *> (&Null (hb_font_t));
}
/**
* hb_font_reference: (skip)
* @font: #hb_font_t to work upon
*
* Increases the reference count on the given font object.
*
* Return value: (transfer full): The @font object
*
* Since: 0.9.2
**/
hb_font_t *
hb_font_reference (hb_font_t *font)
{
return hb_object_reference (font);
}
/**
* hb_font_destroy: (skip)
* @font: #hb_font_t to work upon
*
* Decreases the reference count on the given font object. When the
* reference count reaches zero, the font is destroyed,
* freeing all memory.
*
* Since: 0.9.2
**/
void
hb_font_destroy (hb_font_t *font)
{
if (!hb_object_destroy (font)) return;
font->data.fini ();
if (font->destroy)
font->destroy (font->user_data);
hb_font_destroy (font->parent);
hb_face_destroy (font->face);
hb_font_funcs_destroy (font->klass);
hb_free (font->coords);
hb_free (font->design_coords);
hb_free (font);
}
/**
* hb_font_set_user_data: (skip)
* @font: #hb_font_t to work upon
* @key: The user-data key
* @data: A pointer to the user data
* @destroy: (nullable): A callback to call when @data is not needed anymore
* @replace: Whether to replace an existing data with the same key
*
* Attaches a user-data key/data pair to the specified font object.
*
* Return value: `true` if success, `false` otherwise
*
* Since: 0.9.2
**/
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 /* May be NULL. */,
hb_bool_t replace)
{
if (!hb_object_is_immutable (font))
font->serial++;
return hb_object_set_user_data (font, key, data, destroy, replace);
}
/**
* hb_font_get_user_data: (skip)
* @font: #hb_font_t to work upon
* @key: The user-data key to query
*
* Fetches the user-data object associated with the specified key,
* attached to the specified font object.
*
* Return value: (transfer none): Pointer to the user data
*
* Since: 0.9.2
**/
void *
hb_font_get_user_data (const hb_font_t *font,
hb_user_data_key_t *key)
{
return hb_object_get_user_data (font, key);
}
/**
* hb_font_make_immutable:
* @font: #hb_font_t to work upon
*
* Makes @font immutable.
*
* Since: 0.9.2
**/
void
hb_font_make_immutable (hb_font_t *font)
{
if (hb_object_is_immutable (font))
return;
if (font->parent)
hb_font_make_immutable (font->parent);
hb_object_make_immutable (font);
}
/**
* hb_font_is_immutable:
* @font: #hb_font_t to work upon
*
* Tests whether a font object is immutable.
*
* Return value: `true` if @font is immutable, `false` otherwise
*
* Since: 0.9.2
**/
hb_bool_t
hb_font_is_immutable (hb_font_t *font)
{
return hb_object_is_immutable (font);
}
/**
* hb_font_get_serial:
* @font: #hb_font_t to work upon
*
* Returns the internal serial number of the font. The serial
* number is increased every time a setting on the font is
* changed, using a setter function.
*
* Return value: serial number
*
* Since: 4.4.0
**/
unsigned int
hb_font_get_serial (hb_font_t *font)
{
return font->serial;
}
/**
* hb_font_changed:
* @font: #hb_font_t to work upon
*
* Notifies the @font that underlying font data has changed.
* This has the effect of increasing the serial as returned
* by hb_font_get_serial(), which invalidates internal caches.
*
* Since: 4.4.0
**/
void
hb_font_changed (hb_font_t *font)
{
if (hb_object_is_immutable (font))
return;
font->serial++;
font->mults_changed ();
}
/**
* hb_font_set_parent:
* @font: #hb_font_t to work upon
* @parent: The parent font object to assign
*
* Sets the parent font of @font.
*
* Since: 1.0.5
**/
void
hb_font_set_parent (hb_font_t *font,
hb_font_t *parent)
{
if (hb_object_is_immutable (font))
return;
if (parent == font->parent)
return;
font->serial++;
if (!parent)
parent = hb_font_get_empty ();
hb_font_t *old = font->parent;
font->parent = hb_font_reference (parent);
hb_font_destroy (old);
}
/**
* hb_font_get_parent:
* @font: #hb_font_t to work upon
*
* Fetches the parent font of @font.
*
* Return value: (transfer none): The parent font object
*
* Since: 0.9.2
**/
hb_font_t *
hb_font_get_parent (hb_font_t *font)
{
return font->parent;
}
/**
* hb_font_set_face:
* @font: #hb_font_t to work upon
* @face: The #hb_face_t to assign
*
* Sets @face as the font-face value of @font.
*
* Since: 1.4.3
**/
void
hb_font_set_face (hb_font_t *font,
hb_face_t *face)
{
if (hb_object_is_immutable (font))
return;
if (face == font->face)
return;
font->serial++;
if (unlikely (!face))
face = hb_face_get_empty ();
hb_face_t *old = font->face;
hb_face_make_immutable (face);
font->face = hb_face_reference (face);
font->mults_changed ();
hb_face_destroy (old);
}
/**
* hb_font_get_face:
* @font: #hb_font_t to work upon
*
* Fetches the face associated with the specified font object.
*
* Return value: (transfer none): The #hb_face_t value
*
* Since: 0.9.2
**/
hb_face_t *
hb_font_get_face (hb_font_t *font)
{
return font->face;
}
/**
* hb_font_set_funcs:
* @font: #hb_font_t to work upon
* @klass: (closure font_data) (destroy destroy) (scope notified): The font-functions structure.
* @font_data: Data to attach to @font
* @destroy: (nullable): The function to call when @font_data is not needed anymore
*
* Replaces the font-functions structure attached to a font, updating
* the font's user-data with @font-data and the @destroy callback.
*
* Since: 0.9.2
**/
void
hb_font_set_funcs (hb_font_t *font,
hb_font_funcs_t *klass,
void *font_data,
hb_destroy_func_t destroy /* May be NULL. */)
{
if (hb_object_is_immutable (font))
{
if (destroy)
destroy (font_data);
return;
}
font->serial++;
if (font->destroy)
font->destroy (font->user_data);
if (!klass)
klass = hb_font_funcs_get_empty ();
hb_font_funcs_reference (klass);
hb_font_funcs_destroy (font->klass);
font->klass = klass;
font->user_data = font_data;
font->destroy = destroy;
}
/**
* hb_font_set_funcs_data:
* @font: #hb_font_t to work upon
* @font_data: (destroy destroy) (scope notified): Data to attach to @font
* @destroy: (nullable): The function to call when @font_data is not needed anymore
*
* Replaces the user data attached to a font, updating the font's
* @destroy callback.
*
* Since: 0.9.2
**/
void
hb_font_set_funcs_data (hb_font_t *font,
void *font_data,
hb_destroy_func_t destroy /* May be NULL. */)
{
/* Destroy user_data? */
if (hb_object_is_immutable (font))
{
if (destroy)
destroy (font_data);
return;
}
font->serial++;
if (font->destroy)
font->destroy (font->user_data);
font->user_data = font_data;
font->destroy = destroy;
}
/**
* hb_font_set_scale:
* @font: #hb_font_t to work upon
* @x_scale: Horizontal scale value to assign
* @y_scale: Vertical scale value to assign
*
* Sets the horizontal and vertical scale of a font.
*
* Since: 0.9.2
**/
void
hb_font_set_scale (hb_font_t *font,
int x_scale,
int y_scale)
{
if (hb_object_is_immutable (font))
return;
if (font->x_scale == x_scale && font->y_scale == y_scale)
return;
font->serial++;
font->x_scale = x_scale;
font->y_scale = y_scale;
font->mults_changed ();
}
/**
* hb_font_get_scale:
* @font: #hb_font_t to work upon
* @x_scale: (out): Horizontal scale value
* @y_scale: (out): Vertical scale value
*
* Fetches the horizontal and vertical scale of a font.
*
* Since: 0.9.2
**/
void
hb_font_get_scale (hb_font_t *font,
int *x_scale,
int *y_scale)
{
if (x_scale) *x_scale = font->x_scale;
if (y_scale) *y_scale = font->y_scale;
}
/**
* hb_font_set_ppem:
* @font: #hb_font_t to work upon
* @x_ppem: Horizontal ppem value to assign
* @y_ppem: Vertical ppem value to assign
*
* Sets the horizontal and vertical pixels-per-em (ppem) of a font.
*
* Since: 0.9.2
**/
void
hb_font_set_ppem (hb_font_t *font,
unsigned int x_ppem,
unsigned int y_ppem)
{
if (hb_object_is_immutable (font))
return;
if (font->x_ppem == x_ppem && font->y_ppem == y_ppem)
return;
font->serial++;
font->x_ppem = x_ppem;
font->y_ppem = y_ppem;
}
/**
* hb_font_get_ppem:
* @font: #hb_font_t to work upon
* @x_ppem: (out): Horizontal ppem value
* @y_ppem: (out): Vertical ppem value
*
* Fetches the horizontal and vertical points-per-em (ppem) of a font.
*
* Since: 0.9.2
**/
void
hb_font_get_ppem (hb_font_t *font,
unsigned int *x_ppem,
unsigned int *y_ppem)
{
if (x_ppem) *x_ppem = font->x_ppem;
if (y_ppem) *y_ppem = font->y_ppem;
}
/**
* hb_font_set_ptem:
* @font: #hb_font_t to work upon
* @ptem: font size in points.
*
* Sets the "point size" of a font. Set to zero to unset.
* Used in CoreText to implement optical sizing.
*
* <note>Note: There are 72 points in an inch.</note>
*
* Since: 1.6.0
**/
void
hb_font_set_ptem (hb_font_t *font,
float ptem)
{
if (hb_object_is_immutable (font))
return;
if (font->ptem == ptem)
return;
font->serial++;
font->ptem = ptem;
}
/**
* hb_font_get_ptem:
* @font: #hb_font_t to work upon
*
* Fetches the "point size" of a font. Used in CoreText to
* implement optical sizing.
*
* Return value: Point size. A value of zero means "not set."
*
* Since: 1.6.0
**/
float
hb_font_get_ptem (hb_font_t *font)
{
return font->ptem;
}
/**
* hb_font_set_synthetic_slant:
* @font: #hb_font_t to work upon
* @slant: synthetic slant value.
*
* Sets the "synthetic slant" of a font. By default is zero.
* Synthetic slant is the graphical skew applied to the font
* at rendering time.
*
* HarfBuzz needs to know this value to adjust shaping results,
* metrics, and style values to match the slanted rendering.
*
* <note>Note: The glyph shape fetched via the
* hb_font_get_glyph_shape() is slanted to reflect this value
* as well.</note>
*
* <note>Note: The slant value is a ratio. For example, a
* 20% slant would be represented as a 0.2 value.</note>
*
* Since: 3.3.0
**/
HB_EXTERN void
hb_font_set_synthetic_slant (hb_font_t *font, float slant)
{
if (hb_object_is_immutable (font))
return;
if (font->slant == slant)
return;
font->serial++;
font->slant = slant;
font->mults_changed ();
}
/**
* hb_font_get_synthetic_slant:
* @font: #hb_font_t to work upon
*
* Fetches the "synthetic slant" of a font.
*
* Return value: Synthetic slant. By default is zero.
*
* Since: 3.3.0
**/
HB_EXTERN float
hb_font_get_synthetic_slant (hb_font_t *font)
{
return font->slant;
}
#ifndef HB_NO_VAR
/*
* Variations
*/
/**
* hb_font_set_variations:
* @font: #hb_font_t to work upon
* @variations: (array length=variations_length): Array of variation settings to apply
* @variations_length: Number of variations to apply
*
* Applies a list of font-variation settings to a font.
*
* Note that this overrides all existing variations set on @font.
* Axes not included in @variations will be effectively set to their
* default values.
*
* Since: 1.4.2
*/
void
hb_font_set_variations (hb_font_t *font,
const hb_variation_t *variations,
unsigned int variations_length)
{
if (hb_object_is_immutable (font))
return;
font->serial_coords = ++font->serial;
if (!variations_length)
{
hb_font_set_var_coords_normalized (font, nullptr, 0);
return;
}
const OT::fvar &fvar = *font->face->table.fvar;
auto axes = fvar.get_axes ();
const unsigned coords_length = axes.length;
int *normalized = coords_length ? (int *) hb_calloc (coords_length, sizeof (int)) : nullptr;
float *design_coords = coords_length ? (float *) hb_calloc (coords_length, sizeof (float)) : nullptr;
if (unlikely (coords_length && !(normalized && design_coords)))
{
hb_free (normalized);
hb_free (design_coords);
return;
}
/* Initialize design coords to default from fvar. */
for (unsigned int i = 0; i < coords_length; i++)
design_coords[i] = axes[i].get_default ();
for (unsigned int i = 0; i < variations_length; i++)
{
const auto tag = variations[i].tag;
const auto v = variations[i].value;
for (unsigned axis_index = 0; axis_index < coords_length; axis_index++)
if (axes[axis_index].axisTag == tag)
{
design_coords[axis_index] = v;
normalized[axis_index] = fvar.normalize_axis_value (axis_index, v);
}
}
font->face->table.avar->map_coords (normalized, coords_length);
_hb_font_adopt_var_coords (font, normalized, design_coords, coords_length);
}
/**
* hb_font_set_var_coords_design:
* @font: #hb_font_t to work upon
* @coords: (array length=coords_length): Array of variation coordinates to apply
* @coords_length: Number of coordinates to apply
*
* Applies a list of variation coordinates (in design-space units)
* to a font.
*
* Note that this overrides all existing variations set on @font.
* Axes not included in @coords will be effectively set to their
* default values.
*
* Since: 1.4.2
*/
void
hb_font_set_var_coords_design (hb_font_t *font,
const float *coords,
unsigned int coords_length)
{
if (hb_object_is_immutable (font))
return;
font->serial_coords = ++font->serial;
int *normalized = coords_length ? (int *) hb_calloc (coords_length, sizeof (int)) : nullptr;
float *design_coords = coords_length ? (float *) hb_calloc (coords_length, sizeof (float)) : nullptr;
if (unlikely (coords_length && !(normalized && design_coords)))
{
hb_free (normalized);
hb_free (design_coords);
return;
}
if (coords_length)
memcpy (design_coords, coords, coords_length * sizeof (font->design_coords[0]));
hb_ot_var_normalize_coords (font->face, coords_length, coords, normalized);
_hb_font_adopt_var_coords (font, normalized, design_coords, coords_length);
}
/**
* hb_font_set_var_named_instance:
* @font: a font.
* @instance_index: named instance index.
*
* Sets design coords of a font from a named instance index.
*
* Since: 2.6.0
*/
void
hb_font_set_var_named_instance (hb_font_t *font,
unsigned instance_index)
{
if (hb_object_is_immutable (font))
return;
font->serial_coords = ++font->serial;
unsigned int coords_length = hb_ot_var_named_instance_get_design_coords (font->face, instance_index, nullptr, nullptr);
float *coords = coords_length ? (float *) hb_calloc (coords_length, sizeof (float)) : nullptr;
if (unlikely (coords_length && !coords))
return;
hb_ot_var_named_instance_get_design_coords (font->face, instance_index, &coords_length, coords);
hb_font_set_var_coords_design (font, coords, coords_length);
hb_free (coords);
}
/**
* hb_font_set_var_coords_normalized:
* @font: #hb_font_t to work upon
* @coords: (array length=coords_length): Array of variation coordinates to apply
* @coords_length: Number of coordinates to apply
*
* Applies a list of variation coordinates (in normalized units)
* to a font.
*
* Note that this overrides all existing variations set on @font.
* Axes not included in @coords will be effectively set to their
* default values.
*
* <note>Note: Coordinates should be normalized to 2.14.</note>
*
* Since: 1.4.2
*/
void
hb_font_set_var_coords_normalized (hb_font_t *font,
const int *coords, /* 2.14 normalized */
unsigned int coords_length)
{
if (hb_object_is_immutable (font))
return;
font->serial_coords = ++font->serial;
int *copy = coords_length ? (int *) hb_calloc (coords_length, sizeof (coords[0])) : nullptr;
int *unmapped = coords_length ? (int *) hb_calloc (coords_length, sizeof (coords[0])) : nullptr;
float *design_coords = coords_length ? (float *) hb_calloc (coords_length, sizeof (design_coords[0])) : nullptr;
if (unlikely (coords_length && !(copy && unmapped && design_coords)))
{
hb_free (copy);
hb_free (unmapped);
hb_free (design_coords);
return;
}
if (coords_length)
{
memcpy (copy, coords, coords_length * sizeof (coords[0]));
memcpy (unmapped, coords, coords_length * sizeof (coords[0]));
}
/* Best effort design coords simulation */
font->face->table.avar->unmap_coords (unmapped, coords_length);
for (unsigned int i = 0; i < coords_length; ++i)
design_coords[i] = font->face->table.fvar->unnormalize_axis_value (i, unmapped[i]);
hb_free (unmapped);
_hb_font_adopt_var_coords (font, copy, design_coords, coords_length);
}
/**
* hb_font_get_var_coords_normalized:
* @font: #hb_font_t to work upon
* @length: (out): Number of coordinates retrieved
*
* Fetches the list of normalized variation coordinates currently
* set on a font.
*
* Note that this returned array may only contain values for some
* (or none) of the axes; omitted axes effectively have zero values.
*
* Return value is valid as long as variation coordinates of the font
* are not modified.
*
* Return value: coordinates array
*
* Since: 1.4.2
*/
const int *
hb_font_get_var_coords_normalized (hb_font_t *font,
unsigned int *length)
{
if (length)
*length = font->num_coords;
return font->coords;
}
/**
* hb_font_get_var_coords_design:
* @font: #hb_font_t to work upon
* @length: (out): Number of coordinates retrieved
*
* Fetches the list of variation coordinates (in design-space units) currently
* set on a font.
*
* Note that this returned array may only contain values for some
* (or none) of the axes; omitted axes effectively have their default
* values.
*
* Return value is valid as long as variation coordinates of the font
* are not modified.
*
* Return value: coordinates array
*
* Since: 3.3.0
*/
const float *
hb_font_get_var_coords_design (hb_font_t *font,
unsigned int *length)
{
if (length)
*length = font->num_coords;
return font->design_coords;
}
#endif
#ifndef HB_DISABLE_DEPRECATED
/*
* Deprecated get_glyph_func():
*/
struct hb_trampoline_closure_t
{
void *user_data;
hb_destroy_func_t destroy;
unsigned int ref_count;
};
template <typename FuncType>
struct hb_trampoline_t
{
hb_trampoline_closure_t closure; /* Must be first. */
FuncType func;
};
template <typename FuncType>
static hb_trampoline_t<FuncType> *
trampoline_create (FuncType func,
void *user_data,
hb_destroy_func_t destroy)
{
typedef hb_trampoline_t<FuncType> trampoline_t;
trampoline_t *trampoline = (trampoline_t *) hb_calloc (1, sizeof (trampoline_t));
if (unlikely (!trampoline))
return nullptr;
trampoline->closure.user_data = user_data;
trampoline->closure.destroy = destroy;
trampoline->closure.ref_count = 1;
trampoline->func = func;
return trampoline;
}
static void
trampoline_reference (hb_trampoline_closure_t *closure)
{
closure->ref_count++;
}
static void
trampoline_destroy (void *user_data)
{
hb_trampoline_closure_t *closure = (hb_trampoline_closure_t *) user_data;
if (--closure->ref_count)
return;
if (closure->destroy)
closure->destroy (closure->user_data);
hb_free (closure);
}
typedef hb_trampoline_t<hb_font_get_glyph_func_t> hb_font_get_glyph_trampoline_t;
static hb_bool_t
hb_font_get_nominal_glyph_trampoline (hb_font_t *font,
void *font_data,
hb_codepoint_t unicode,
hb_codepoint_t *glyph,
void *user_data)
{
hb_font_get_glyph_trampoline_t *trampoline = (hb_font_get_glyph_trampoline_t *) user_data;
return trampoline->func (font, font_data, unicode, 0, glyph, trampoline->closure.user_data);
}
static hb_bool_t
hb_font_get_variation_glyph_trampoline (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_glyph_trampoline_t *trampoline = (hb_font_get_glyph_trampoline_t *) user_data;
return trampoline->func (font, font_data, unicode, variation_selector, glyph, trampoline->closure.user_data);
}
/**
* hb_font_funcs_set_glyph_func:
* @ffuncs: The font-functions structure
* @func: (closure user_data) (destroy destroy) (scope notified): callback function
* @user_data: data to pass to @func
* @destroy: (nullable): function to call when @user_data is not needed anymore
*
* Deprecated. Use hb_font_funcs_set_nominal_glyph_func() and
* hb_font_funcs_set_variation_glyph_func() instead.
*
* Since: 0.9.2
* Deprecated: 1.2.3
**/
void
hb_font_funcs_set_glyph_func (hb_font_funcs_t *ffuncs,
hb_font_get_glyph_func_t func,
void *user_data,
hb_destroy_func_t destroy /* May be NULL. */)
{
if (hb_object_is_immutable (ffuncs))
{
if (destroy)
destroy (user_data);
return;
}
hb_font_get_glyph_trampoline_t *trampoline;
trampoline = trampoline_create (func, user_data, destroy);
if (unlikely (!trampoline))
{
if (destroy)
destroy (user_data);
return;
}
/* Since we pass it to two destroying functions. */
trampoline_reference (&trampoline->closure);
hb_font_funcs_set_nominal_glyph_func (ffuncs,
hb_font_get_nominal_glyph_trampoline,
trampoline,
trampoline_destroy);
hb_font_funcs_set_variation_glyph_func (ffuncs,
hb_font_get_variation_glyph_trampoline,
trampoline,
trampoline_destroy);
}
#endif
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