hb_ft_face_create ()

hb_face_t *
hb_ft_face_create (FT_Face ft_face,
                   hb_destroy_func_t destroy);

Creates an hb_face_t face object from the specified FT_Face.

Note that this is using the FT_Face object just to get at the underlying font data, and fonts created from the returned hb_face_t will use the native HarfBuzz font implementation, unless you call hb_ft_font_set_funcs() on them.

This variant of the function does not provide any life-cycle management.

Most client programs should use hb_ft_face_create_referenced() (or, perhaps, hb_ft_face_create_cached()) instead.

If you know you have valid reasons not to use hb_ft_face_create_referenced(), then it is the client program's responsibility to destroy ft_face after the hb_face_t face object has been destroyed.

Since: 0.9.2

hb_ft_face_create_cached ()

hb_face_t *
hb_ft_face_create_cached (FT_Face ft_face);

Creates an hb_face_t face object from the specified FT_Face.

Note that this is using the FT_Face object just to get at the underlying font data, and fonts created from the returned hb_face_t will use the native HarfBuzz font implementation, unless you call hb_ft_font_set_funcs() on them.

This variant of the function caches the newly created hb_face_t face object, using the generic pointer of ft_face . Subsequent function calls that are passed the same ft_face parameter will have the same hb_face_t returned to them, and that hb_face_t will be correctly reference counted.

However, client programs are still responsible for destroying ft_face after the last hb_face_t face object has been destroyed.

Since: 0.9.2

hb_ft_face_create_referenced ()

hb_face_t *
hb_ft_face_create_referenced (FT_Face ft_face);

Creates an hb_face_t face object from the specified FT_Face.

Note that this is using the FT_Face object just to get at the underlying font data, and fonts created from the returned hb_face_t will use the native HarfBuzz font implementation, unless you call hb_ft_font_set_funcs() on them.

This is the preferred variant of the hb_ft_face_create* function family, because it calls FT_Reference_Face() on ft_face , ensuring that ft_face remains alive as long as the resulting hb_face_t face object remains alive. Also calls FT_Done_Face() when the hb_face_t face object is destroyed.

Use this version unless you know you have good reasons not to.

Since: 0.9.38

hb_ft_font_create ()

hb_font_t *
hb_ft_font_create (FT_Face ft_face,
                   hb_destroy_func_t destroy);

Creates an hb_font_t font object from the specified FT_Face.

This variant of the function does not provide any life-cycle management.

Most client programs should use hb_ft_font_create_referenced() instead.

If you know you have valid reasons not to use hb_ft_font_create_referenced(), then it is the client program's responsibility to destroy ft_face after the hb_font_t font object has been destroyed.

HarfBuzz will use the destroy callback on the hb_font_t font object if it is supplied when you use this function. However, even if destroy is provided, it is the client program's responsibility to destroy ft_face , and it is the client program's responsibility to ensure that ft_face is destroyed only after the hb_font_t font object has been destroyed.

Since: 0.9.2

hb_ft_font_create_referenced ()

hb_font_t *
hb_ft_font_create_referenced (FT_Face ft_face);

Creates an hb_font_t font object from the specified FT_Face.

This is the preferred variant of the hb_ft_font_create* function family, because it calls FT_Reference_Face() on ft_face , ensuring that ft_face remains alive as long as the resulting hb_font_t font object remains alive.

Use this version unless you know you have good reasons not to.

Since: 0.9.38

hb_ft_font_changed ()

void
hb_ft_font_changed (hb_font_t *font);

Refreshes the state of font when the underlying FT_Face has changed. This function should be called after changing the size or variation-axis settings on the FT_Face.

Since: 1.0.5

hb_ft_font_get_face ()

FT_Face
hb_ft_font_get_face (hb_font_t *font);

Fetches the FT_Face associated with the specified hb_font_t font object.

This function works with hb_font_t objects created by hb_ft_font_create() or hb_ft_font_create_referenced().

[skip]

Since: 0.9.2

hb_ft_font_lock_face ()

FT_Face
hb_ft_font_lock_face (hb_font_t *font);

Gets the FT_Face associated with font .

This face will be kept around and access to the FT_Face object from other HarfBuzz API wil be blocked until you call hb_ft_font_unlock_face().

This function works with hb_font_t objects created by hb_ft_font_create() or hb_ft_font_create_referenced().

[skip]

Since: 2.6.5

hb_ft_font_unlock_face ()

void
hb_ft_font_unlock_face (hb_font_t *font);

Releases an FT_Face previously obtained with hb_ft_font_lock_face().

[skip]

Since: 2.6.5

hb_ft_font_set_load_flags ()

void
hb_ft_font_set_load_flags (hb_font_t *font,
                           int load_flags);

Sets the FT_Load_Glyph load flags for the specified hb_font_t.

For more information, see https://freetype.org/freetype2/docs/reference/ft2-glyph_retrieval.html#ft_load_xxx

This function works with hb_font_t objects created by hb_ft_font_create() or hb_ft_font_create_referenced().

Since: 1.0.5

hb_ft_font_get_load_flags ()

int
hb_ft_font_get_load_flags (hb_font_t *font);

Fetches the FT_Load_Glyph load flags of the specified hb_font_t.

For more information, see https://freetype.org/freetype2/docs/reference/ft2-glyph_retrieval.html#ft_load_xxx

This function works with hb_font_t objects created by hb_ft_font_create() or hb_ft_font_create_referenced().

Since: 1.0.5

hb_ft_font_set_funcs ()

void
hb_ft_font_set_funcs (hb_font_t *font);

Configures the font-functions structure of the specified hb_font_t font object to use FreeType font functions.

In particular, you can use this function to configure an existing hb_face_t face object for use with FreeType font functions even if that hb_face_t face object was initially created with hb_face_create(), and therefore was not initially configured to use FreeType font functions.

An hb_font_t object created with hb_ft_font_create() is preconfigured for FreeType font functions and does not require this function to be used.

Note that if you modify the underlying hb_font_t after calling this function, you need to call hb_ft_hb_font_changed() to update the underlying FT_Face.

Since: 1.0.5

hb_ft_hb_font_changed ()

hb_bool_t
hb_ft_hb_font_changed (hb_font_t *font);

Refreshes the state of the underlying FT_Face of font when the hb_font_t font has changed. This function should be called after changing the size or variation-axis settings on the font . This call is fast if nothing has changed on font .

Since: 4.4.0