* @short_description: Font objects
* @include: hb.h
*
- * Font objects represent a font face at a certain size and other
- * parameters (pixels per EM, points per EM, variation settings.)
- * Fonts are created from font faces, and are used as input to
- * hb_shape() among other things.
+ * 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.
**/
*/
static hb_bool_t
-hb_font_get_font_h_extents_nil (hb_font_t *font HB_UNUSED,
- void *font_data HB_UNUSED,
+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)
+ 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_get_font_h_extents_default (hb_font_t *font,
+ void *font_data HB_UNUSED,
hb_font_extents_t *extents,
- void *user_data HB_UNUSED)
+ void *user_data HB_UNUSED)
{
hb_bool_t ret = font->parent->get_font_h_extents (extents);
if (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_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)
+ 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_get_font_v_extents_default (hb_font_t *font,
+ void *font_data HB_UNUSED,
hb_font_extents_t *extents,
- void *user_data HB_UNUSED)
+ void *user_data HB_UNUSED)
{
hb_bool_t ret = font->parent->get_font_v_extents (extents);
if (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_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)
+ 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_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)
+ void *user_data HB_UNUSED)
{
if (font->has_nominal_glyphs_func_set ())
{
}
#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,
+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)
+ 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 ())
{
}
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_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)
+ 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_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)
+ 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)
+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)
+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 ())
{
}
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)
+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)
+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 ())
{
}
#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,
+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)
+ 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 ())
{
#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,
+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)
+ 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 ())
{
}
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)
+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_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)
}
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)
+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_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)
}
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)
+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)
+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)
+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)
+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_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)
+ 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_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)
+ void *user_data HB_UNUSED)
{
hb_bool_t ret = font->parent->get_glyph_extents (glyph, extents);
if (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)
+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_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)
}
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)
+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)
+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_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)
+ 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_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)
+ void *user_data HB_UNUSED)
{
return font->parent->get_glyph_from_name (name, len, glyph);
}
/**
* hb_font_funcs_create: (Xconstructor)
*
+ * Creates a new #hb_font_funcs_t structure of font functions.
*
- *
- * Return value: (transfer full):
+ * Return value: (transfer full): The font-functions structure
*
* Since: 0.9.2
**/
/**
* hb_font_funcs_get_empty:
*
+ * Fetches an empty font-functions structure.
*
- *
- * Return value: (transfer full):
+ * Return value: (transfer full): The font-functions structure
*
* Since: 0.9.2
**/
/**
* hb_font_funcs_reference: (skip)
- * @ffuncs: font functions.
- *
+ * @ffuncs: The font-functions structure
*
+ * Increases the reference count on a font-functions structure.
*
- * Return value:
+ * Return value: The font-functions structure
*
* Since: 0.9.2
**/
/**
* hb_font_funcs_destroy: (skip)
- * @ffuncs: font functions.
- *
+ * @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
**/
HB_FONT_FUNCS_IMPLEMENT_CALLBACKS
#undef HB_FONT_FUNC_IMPLEMENT
- free (ffuncs);
+ hb_free (ffuncs);
}
/**
* hb_font_funcs_set_user_data: (skip)
- * @ffuncs: font functions.
- * @key:
- * @data:
- * @destroy:
- * @replace:
- *
+ * @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:
+ * Return value: %true if success, %false otherwise
*
* Since: 0.9.2
**/
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_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: font functions.
- * @key:
+ * @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):
+ * Return value: (transfer none): A pointer to the user data
*
* Since: 0.9.2
**/
/**
* hb_font_funcs_make_immutable:
- * @ffuncs: font functions.
- *
+ * @ffuncs: The font-functions structure
*
+ * Makes a font-functions structure immutable.
*
* Since: 0.9.2
**/
/**
* hb_font_funcs_is_immutable:
- * @ffuncs: font functions.
- *
+ * @ffuncs: The font-functions structure
*
+ * Tests whether a font-functions structure is immutable.
*
- * Return value:
+ * Return value: %true if @ffuncs is immutable, %false otherwise
*
* Since: 0.9.2
**/
/**
* hb_font_get_h_extents:
- * @font: a font.
- * @extents: (out):
- *
+ * @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:
+ * 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_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: a font.
- * @extents: (out):
- *
+ * @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:
+ * 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_get_v_extents (hb_font_t *font,
hb_font_extents_t *extents)
{
return font->get_font_v_extents (extents);
/**
* hb_font_get_glyph:
- * @font: a font.
- * @unicode:
- * @variation_selector:
- * @glyph: (out):
+ * @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:
+ * 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_font_get_glyph (hb_font_t *font,
+ hb_codepoint_t unicode,
+ hb_codepoint_t variation_selector,
hb_codepoint_t *glyph)
{
if (unlikely (variation_selector))
/**
* hb_font_get_nominal_glyph:
- * @font: a font.
- * @unicode:
- * @glyph: (out):
+ * @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:
+ * 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_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: a font.
+ * @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:
+ * Return value: the number of code points processed
*
* Since: 2.6.3
**/
/**
* hb_font_get_variation_glyph:
- * @font: a font.
- * @unicode:
- * @variation_selector:
- * @glyph: (out):
+ * @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:
+ * 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_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: a font.
- * @glyph:
+ * @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:
+ * 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)
+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: a font.
- * @glyph:
- *
+ * @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:
+ * 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)
+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: a font.
- *
+ * @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,
+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)
+ 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: a font.
- *
+ * @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,
+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)
+ 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: a font.
- * @glyph:
- * @x: (out):
- * @y: (out):
+ * @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:
+ * 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)
+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: a font.
- * @glyph:
- * @x: (out):
- * @y: (out):
+ * @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:
+ * 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)
+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: a font.
- * @left_glyph:
- * @right_glyph:
+ * @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:
+ * 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)
+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: a font.
- * @top_glyph:
- * @bottom_glyph:
+ * @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:
+ * 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)
+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);
}
/**
* hb_font_get_glyph_extents:
- * @font: a font.
- * @glyph:
- * @extents: (out):
- *
+ * @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:
+ * 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_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: a font.
- * @glyph:
- * @point_index:
- * @x: (out):
- * @y: (out):
- *
+ * @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:
+ * 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)
+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: a font.
- * @glyph:
- * @name: (array length=size):
- * @size:
- *
+ * @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:
+ * 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)
+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: a font.
- * @name: (array length=len):
- * @len:
- * @glyph: (out):
+ * @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:
+ * 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_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_extents_for_direction:
- * @font: a font.
- * @direction:
- * @extents: (out):
+ * @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_get_extents_for_direction (hb_font_t *font,
+ hb_direction_t direction,
hb_font_extents_t *extents)
{
return font->get_extents_for_direction (direction, extents);
}
/**
* hb_font_get_glyph_advance_for_direction:
- * @font: a font.
- * @glyph:
- * @direction:
- * @x: (out):
- * @y: (out):
+ * @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)
+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)
{
return font->get_glyph_advance_for_direction (glyph, direction, x, y);
}
/**
* hb_font_get_glyph_advances_for_direction:
- * @font: a font.
- * @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,
+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)
+ 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: a font.
- * @glyph:
- * @direction:
- * @x: (out):
- * @y: (out):
+ * @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)
+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: a font.
- * @glyph:
- * @direction:
- * @x: (out):
- * @y: (out):
+ * @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)
+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: a font.
- * @glyph:
- * @direction:
- * @x: (out):
- * @y: (out):
+ * @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)
+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: a font.
- * @first_glyph:
- * @second_glyph:
- * @direction:
- * @x: (out):
- * @y: (out):
+ * @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)
+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: a font.
- * @glyph:
- * @direction:
- * @extents: (out):
+ * @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:
+ * 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_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: a font.
- * @glyph:
- * @point_index:
- * @direction:
- * @x: (out):
- * @y: (out):
+ * @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:
+ * 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)
+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);
}
-/* Generates gidDDD if glyph has no name. */
/**
* hb_font_glyph_to_string:
- * @font: a font.
- * @glyph:
- * @s: (array length=size):
- * @size:
+ * @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)
+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);
}
-/* Parses gidDDD and uniUUUU strings automatically. */
/**
* hb_font_glyph_from_string:
- * @font: a font.
- * @s: (array length=len) (element-type uint8_t):
- * @len:
- * @glyph: (out):
+ * @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:
+ * 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, /* -1 means nul-terminated */
+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);
1000, /* x_scale */
1000, /* y_scale */
+ 0., /* slant */
+ 0., /* slant_xy; */
1<<16, /* x_mult */
1<<16, /* y_mult */
* hb_font_create: (Xconstructor)
* @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):
+ * Return value: (transfer full): The new font object
*
* Since: 0.9.2
**/
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;
}
float *design_coords,
unsigned int coords_length)
{
- free (font->coords);
- free (font->design_coords);
+ hb_free (font->coords);
+ hb_free (font->design_coords);
font->coords = coords;
font->design_coords = design_coords;
/**
* hb_font_create_sub_font:
- * @parent: parent 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):
+ * Return value: (transfer full): The new sub-font font object
*
* Since: 0.9.2
**/
font->x_scale = parent->x_scale;
font->y_scale = parent->y_scale;
+ font->slant = parent->slant;
font->mults_changed ();
font->x_ppem = parent->x_ppem;
font->y_ppem = parent->y_ppem;
unsigned int num_coords = parent->num_coords;
if (num_coords)
{
- int *coords = (int *) calloc (num_coords, sizeof (parent->coords[0]));
- float *design_coords = (float *) calloc (num_coords, sizeof (parent->design_coords[0]));
+ 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]));
}
else
{
- free (coords);
- free (design_coords);
+ hb_free (coords);
+ hb_free (design_coords);
}
}
/**
* hb_font_get_empty:
*
+ * Fetches the empty font object.
*
- *
- * Return value: (transfer full)
+ * Return value: (transfer full): The empty font object
*
* Since: 0.9.2
**/
/**
* hb_font_reference: (skip)
- * @font: a font.
+ * @font: #hb_font_t to work upon
*
+ * Increases the reference count on the given font object.
*
- *
- * Return value: (transfer full):
+ * Return value: (transfer full): The @font object
*
* Since: 0.9.2
**/
/**
* hb_font_destroy: (skip)
- * @font: a font.
- *
+ * @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
**/
hb_face_destroy (font->face);
hb_font_funcs_destroy (font->klass);
- free (font->coords);
- free (font->design_coords);
+ hb_free (font->coords);
+ hb_free (font->design_coords);
- free (font);
+ hb_free (font);
}
/**
* hb_font_set_user_data: (skip)
- * @font: a font.
- * @key:
- * @data:
- * @destroy:
- * @replace:
- *
+ * @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:
+ * Return value: %true if success, %false otherwise
*
* Since: 0.9.2
**/
hb_font_set_user_data (hb_font_t *font,
hb_user_data_key_t *key,
void * data,
- hb_destroy_func_t destroy,
+ hb_destroy_func_t destroy /* May be NULL. */,
hb_bool_t replace)
{
return hb_object_set_user_data (font, key, data, destroy, replace);
/**
* hb_font_get_user_data: (skip)
- * @font: a font.
- * @key:
- *
+ * @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):
+ * Return value: (transfer none): Pointer to the user data
*
* Since: 0.9.2
**/
/**
* hb_font_make_immutable:
- * @font: a font.
- *
+ * @font: #hb_font_t to work upon
*
+ * Makes @font immutable.
*
* Since: 0.9.2
**/
/**
* hb_font_is_immutable:
- * @font: a font.
+ * @font: #hb_font_t to work upon
*
+ * Tests whether a font object is immutable.
*
- *
- * Return value:
+ * Return value: %true if @font is immutable, %false otherwise
*
* Since: 0.9.2
**/
/**
* hb_font_set_parent:
- * @font: a font.
- * @parent: new parent.
+ * @font: #hb_font_t to work upon
+ * @parent: The parent font object to assign
*
- * Sets parent font of @font.
+ * Sets the parent font of @font.
*
* Since: 1.0.5
**/
/**
* hb_font_get_parent:
- * @font: a font.
+ * @font: #hb_font_t to work upon
*
+ * Fetches the parent font of @font.
*
- *
- * Return value: (transfer none):
+ * Return value: (transfer none): The parent font object
*
* Since: 0.9.2
**/
/**
* hb_font_set_face:
- * @font: a font.
- * @face: new face.
+ * @font: #hb_font_t to work upon
+ * @face: The #hb_face_t to assign
*
- * Sets font-face of @font.
+ * Sets @face as the font-face value of @font.
*
* Since: 1.4.3
**/
/**
* hb_font_get_face:
- * @font: a font.
- *
+ * @font: #hb_font_t to work upon
*
+ * Fetches the face associated with the specified font object.
*
- * Return value: (transfer none):
+ * Return value: (transfer none): The #hb_face_t value
*
* Since: 0.9.2
**/
/**
* hb_font_set_funcs:
- * @font: a font.
- * @klass: (closure font_data) (destroy destroy) (scope notified):
- * @font_data:
- * @destroy:
- *
+ * @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
**/
hb_font_set_funcs (hb_font_t *font,
hb_font_funcs_t *klass,
void *font_data,
- hb_destroy_func_t destroy)
+ hb_destroy_func_t destroy /* May be NULL. */)
{
if (hb_object_is_immutable (font))
{
/**
* hb_font_set_funcs_data:
- * @font: a font.
- * @font_data: (destroy destroy) (scope notified):
- * @destroy:
- *
+ * @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)
+ void *font_data,
+ hb_destroy_func_t destroy /* May be NULL. */)
{
/* Destroy user_data? */
if (hb_object_is_immutable (font))
/**
* hb_font_set_scale:
- * @font: a font.
- * @x_scale:
- * @y_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)
+ int x_scale,
+ int y_scale)
{
if (hb_object_is_immutable (font))
return;
/**
* hb_font_get_scale:
- * @font: a font.
- * @x_scale: (out):
- * @y_scale: (out):
- *
+ * @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)
+ 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: a font.
- * @x_ppem:
- * @y_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)
+hb_font_set_ppem (hb_font_t *font,
+ unsigned int x_ppem,
+ unsigned int y_ppem)
{
if (hb_object_is_immutable (font))
return;
/**
* hb_font_get_ppem:
- * @font: a font.
- * @x_ppem: (out):
- * @y_ppem: (out):
- *
+ * @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,
+hb_font_get_ppem (hb_font_t *font,
unsigned int *x_ppem,
unsigned int *y_ppem)
{
/**
* hb_font_set_ptem:
- * @font: a font.
+ * @font: #hb_font_t to work upon
* @ptem: font size in points.
*
- * Sets "point size" of the font. Set to 0 to unset.
+ * Sets the "point size" of a font. Set to zero to unset.
+ * Used in CoreText to implement optical sizing.
*
- * There are 72 points in an inch.
+ * <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)
+hb_font_set_ptem (hb_font_t *font,
+ float ptem)
{
if (hb_object_is_immutable (font))
return;
/**
* hb_font_get_ptem:
- * @font: a font.
+ * @font: #hb_font_t to work upon
*
- * Gets the "point size" of the font. A value of 0 means unset.
+ * Fetches the "point size" of a font. Used in CoreText to
+ * implement optical sizing.
*
- * Return value: Point size.
+ * Return value: Point size. A value of zero means "not set."
*
- * Since: 0.9.2
+ * 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 that the renderer
+ * applies 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 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;
+
+ 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,
+hb_font_set_variations (hb_font_t *font,
const hb_variation_t *variations,
- unsigned int variations_length)
+ unsigned int variations_length)
{
if (hb_object_is_immutable (font))
return;
return;
}
- unsigned int coords_length = hb_ot_var_get_axis_count (font->face);
+ const OT::fvar &fvar = *font->face->table.fvar;
+ auto axes = fvar.get_axes ();
+ const unsigned coords_length = axes.length;
- int *normalized = coords_length ? (int *) calloc (coords_length, sizeof (int)) : nullptr;
- float *design_coords = coords_length ? (float *) calloc (coords_length, sizeof (float)) : nullptr;
+ 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)))
{
- free (normalized);
- free (design_coords);
+ hb_free (normalized);
+ hb_free (design_coords);
return;
}
- const OT::fvar &fvar = *font->face->table.fvar;
for (unsigned int i = 0; i < variations_length; i++)
{
- hb_ot_var_axis_info_t info;
- if (hb_ot_var_find_axis_info (font->face, variations[i].tag, &info) &&
- info.axis_index < coords_length)
- {
- float v = variations[i].value;
- design_coords[info.axis_index] = v;
- normalized[info.axis_index] = fvar.normalize_axis_value (info.axis_index, v);
- }
+ 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_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)
+hb_font_set_var_coords_design (hb_font_t *font,
+ const float *coords,
+ unsigned int coords_length)
{
if (hb_object_is_immutable (font))
return;
- int *normalized = coords_length ? (int *) calloc (coords_length, sizeof (int)) : nullptr;
- float *design_coords = coords_length ? (float *) calloc (coords_length, sizeof (float)) : nullptr;
+ 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)))
{
- free (normalized);
- free (design_coords);
+ hb_free (normalized);
+ hb_free (design_coords);
return;
}
unsigned int coords_length = hb_ot_var_named_instance_get_design_coords (font->face, instance_index, nullptr, nullptr);
- float *coords = coords_length ? (float *) calloc (coords_length, sizeof (float)) : 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);
- free (coords);
+ 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)
+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;
- int *copy = coords_length ? (int *) calloc (coords_length, sizeof (coords[0])) : nullptr;
- int *unmapped = coords_length ? (int *) calloc (coords_length, sizeof (coords[0])) : nullptr;
- float *design_coords = coords_length ? (float *) calloc (coords_length, sizeof (design_coords[0])) : nullptr;
+ 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)))
{
- free (copy);
- free (unmapped);
- free (design_coords);
+ hb_free (copy);
+ hb_free (unmapped);
+ hb_free (design_coords);
return;
}
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]);
- free (unmapped);
+ 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,
+hb_font_get_var_coords_normalized (hb_font_t *font,
unsigned int *length)
{
if (length)
return font->coords;
}
-#ifdef HB_EXPERIMENTAL_API
/**
* 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.
*
- * Since: EXPERIMENTAL
+ * Return value: coordinates array
+ *
+ * Since: 3.3.0
*/
const float *
hb_font_get_var_coords_design (hb_font_t *font,
return font->design_coords;
}
#endif
-#endif
#ifndef HB_DISABLE_DEPRECATED
/*
{
typedef hb_trampoline_t<FuncType> trampoline_t;
- trampoline_t *trampoline = (trampoline_t *) calloc (1, sizeof (trampoline_t));
+ trampoline_t *trampoline = (trampoline_t *) hb_calloc (1, sizeof (trampoline_t));
if (unlikely (!trampoline))
return nullptr;
if (closure->destroy)
closure->destroy (closure->user_data);
- free (closure);
+ 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_font_get_nominal_glyph_trampoline (hb_font_t *font,
+ void *font_data,
+ hb_codepoint_t unicode,
hb_codepoint_t *glyph,
- void *user_data)
+ 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_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)
+ 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: font functions.
- * @func: (closure user_data) (destroy destroy) (scope notified): callback function.
- * @user_data: data to pass to @func.
- * @destroy: function to call when @user_data is not needed anymore.
+ * @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.
* 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)
+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))
{
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