[docs] Update gtk-doc comments in hb-font
This commit is contained in:
Nathan Willis
Khaled Hosny
parent
e8de26e1ef
commit
82092d4005
623
src/hb-font.cc
623
src/hb-font.cc
File diff suppressed because it is too large
Load Diff
371
src/hb-font.h
371
src/hb-font.h
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@ -45,6 +45,19 @@ typedef struct hb_font_t hb_font_t;
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* hb_font_funcs_t
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*/
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/**
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* hb_font_funcs_t:
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*
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* Data type containing a set of virtual methods used for
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* working on #hb_font_t font objects.
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*
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* HarfBuzz provides a lightweight default function for each of
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* the methods in #hb_font_funcs_t. Client programs can implement
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* their own replacements for the individual font functions, as
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* needed, and replace the default by calling the setter for a
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* method.
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*
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**/
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typedef struct hb_font_funcs_t hb_font_funcs_t;
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HB_EXTERN hb_font_funcs_t *
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@ -81,7 +94,17 @@ hb_font_funcs_is_immutable (hb_font_funcs_t *ffuncs);
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/* font and glyph extents */
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/* Note that typically ascender is positive and descender negative in coordinate systems that grow up. */
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/**
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* hb_font_extents_t:
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* @ascender: The height of typographic ascenders.
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* @descender: The depth of typographic descenders.
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* @line_gap: The suggested line-spacing gap.
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*
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* Font-wide extent values, measured in font units.
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*
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* Note that typically @ascender is positive and @descender
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* negative, in coordinate systems that grow up.
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**/
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typedef struct hb_font_extents_t {
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hb_position_t ascender; /* typographic ascender. */
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hb_position_t descender; /* typographic descender. */
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@ -98,7 +121,17 @@ typedef struct hb_font_extents_t {
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hb_position_t reserved1;
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} hb_font_extents_t;
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/* Note that height is negative in coordinate systems that grow up. */
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/**
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* hb_glyph_extents_t:
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* @x_bearing: Distance from the x-origin to the left extremum of the glyph.
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* @y_bearing: Distance from the top extremum of the glyph to the y-origin.
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* @width: Distance from the left extremum of the glyph to the right extremum.
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* @height: Distance from the top extremum of the glyph to the bottom extremum.
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*
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* Glyph extent values, measured in font units.
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*
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* Note that @height is negative, in coordinate systems that grow up.
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**/
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typedef struct hb_glyph_extents_t {
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hb_position_t x_bearing; /* left side of glyph from origin. */
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hb_position_t y_bearing; /* top side of glyph from origin. */
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@ -111,19 +144,72 @@ typedef struct hb_glyph_extents_t {
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typedef hb_bool_t (*hb_font_get_font_extents_func_t) (hb_font_t *font, void *font_data,
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hb_font_extents_t *extents,
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void *user_data);
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/**
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* hb_font_get_font_h_extents_func_t:
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*
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* A virtual method for the #hb_font_funcs_t of an #hb_font_t object.
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*
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* This method should retrieve the extents for a font, in horizontal-direction
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* text segments. Extents must be returned in an #hb_glyph_extents output
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* parameter.
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*
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**/
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typedef hb_font_get_font_extents_func_t hb_font_get_font_h_extents_func_t;
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/**
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* hb_font_get_font_v_extents_func_t:
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*
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* A virtual method for the #hb_font_funcs_t of an #hb_font_t object.
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*
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* This method should retrieve the extents for a font, in vertical-direction
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* text segments. Extents must be returned in an #hb_glyph_extents output
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* parameter.
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*
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**/
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typedef hb_font_get_font_extents_func_t hb_font_get_font_v_extents_func_t;
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/**
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* hb_font_get_nominal_glyph_func_t:
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*
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* A virtual method for the #hb_font_funcs_t of an #hb_font_t object.
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*
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* This method should retrieve the nominal glyph ID for a specified Unicode code
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* point. Glyph IDs must be returned in a #hb_codepoint_t output parameter.
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*
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**/
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typedef hb_bool_t (*hb_font_get_nominal_glyph_func_t) (hb_font_t *font, void *font_data,
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hb_codepoint_t unicode,
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hb_codepoint_t *glyph,
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void *user_data);
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/**
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* hb_font_get_variation_glyph_func_t:
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*
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* A virtual method for the #hb_font_funcs_t of an #hb_font_t object.
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*
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* This method should retrieve the glyph ID for a specified Unicode code point
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* followed by a specified Variation Selector code point. Glyph IDs must be
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* returned in a #hb_codepoint_t output parameter.
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*
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**/
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typedef hb_bool_t (*hb_font_get_variation_glyph_func_t) (hb_font_t *font, void *font_data,
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hb_codepoint_t unicode, hb_codepoint_t variation_selector,
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hb_codepoint_t *glyph,
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void *user_data);
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/**
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* hb_font_get_nominal_glyphs_func_t:
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*
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* A virtual method for the #hb_font_funcs_t of an #hb_font_t object.
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*
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* This method should retrieve the nominal glyph IDs for a sequence of
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* Unicode code points. Glyph IDs must be returned in a #hb_codepoint_t
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* output parameter.
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*
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**/
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typedef unsigned int (*hb_font_get_nominal_glyphs_func_t) (hb_font_t *font, void *font_data,
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unsigned int count,
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const hb_codepoint_t *first_unicode,
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@ -132,13 +218,51 @@ typedef unsigned int (*hb_font_get_nominal_glyphs_func_t) (hb_font_t *font, void
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unsigned int glyph_stride,
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void *user_data);
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/**
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* hb_font_get_glyph_advance_func_t:
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*
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* A virtual method for the #hb_font_funcs_t of an #hb_font_t object.
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*
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* This method should retrieve the advance for a specified glyph. The
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* method must return an #hb_position_t.
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*
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**/
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typedef hb_position_t (*hb_font_get_glyph_advance_func_t) (hb_font_t *font, void *font_data,
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hb_codepoint_t glyph,
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void *user_data);
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/**
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* hb_font_get_glyph_h_advance_func_t:
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*
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* A virtual method for the #hb_font_funcs_t of an #hb_font_t object.
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*
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* This method should retrieve the advance for a specified glyph, in
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* horizontal-direction text segments. Advances must be returned in
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* an #hb_position_t output parameter.
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*
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**/
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typedef hb_font_get_glyph_advance_func_t hb_font_get_glyph_h_advance_func_t;
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/**
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* hb_font_get_glyph_v_advance_func_t:
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*
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* A virtual method for the #hb_font_funcs_t of an #hb_font_t object.
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*
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* This method should retrieve the advance for a specified glyph, in
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* vertical-direction text segments. Advances must be returned in
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* an #hb_position_t output parameter.
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*
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**/
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typedef hb_font_get_glyph_advance_func_t hb_font_get_glyph_v_advance_func_t;
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/**
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* hb_font_get_glyph_advances_func_t:
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*
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* A virtual method for the #hb_font_funcs_t of an #hb_font_t object.
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*
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* This method should retrieve the advances for a sequence of glyphs.
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*
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**/
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typedef void (*hb_font_get_glyph_advances_func_t) (hb_font_t* font, void* font_data,
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unsigned int count,
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const hb_codepoint_t *first_glyph,
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@ -146,14 +270,66 @@ typedef void (*hb_font_get_glyph_advances_func_t) (hb_font_t* font, void* font_d
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hb_position_t *first_advance,
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unsigned advance_stride,
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void *user_data);
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/**
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* hb_font_get_glyph_h_advances_func_t:
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*
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* A virtual method for the #hb_font_funcs_t of an #hb_font_t object.
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*
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* This method should retrieve the advances for a sequence of glyphs, in
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* horizontal-direction text segments.
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*
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**/
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typedef hb_font_get_glyph_advances_func_t hb_font_get_glyph_h_advances_func_t;
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/**
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* hb_font_get_glyph_v_advances_func_t:
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*
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* A virtual method for the #hb_font_funcs_t of an #hb_font_t object.
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*
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* This method should retrieve the advances for a sequence of glyphs, in
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* vertical-direction text segments.
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*
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**/
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typedef hb_font_get_glyph_advances_func_t hb_font_get_glyph_v_advances_func_t;
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/**
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* hb_font_get_glyph_origin_func_t:
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*
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* A virtual method for the #hb_font_funcs_t of an #hb_font_t object.
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*
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* This method should retrieve the (X,Y) coordinates (in font units) of the
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* origin for a glyph. Each coordinate must be returned in an #hb_position_t
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* output parameter.
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*
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**/
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typedef hb_bool_t (*hb_font_get_glyph_origin_func_t) (hb_font_t *font, void *font_data,
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hb_codepoint_t glyph,
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hb_position_t *x, hb_position_t *y,
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void *user_data);
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/**
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* hb_font_get_glyph_h_origin_func_t:
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*
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* A virtual method for the #hb_font_funcs_t of an #hb_font_t object.
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*
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* This method should retrieve the (X,Y) coordinates (in font units) of the
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* origin for a glyph, in horizontal-direction text segments. Each
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* coordinate must be returned in an #hb_position_t output parameter.
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*
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**/
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typedef hb_font_get_glyph_origin_func_t hb_font_get_glyph_h_origin_func_t;
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/**
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* hb_font_get_glyph_v_origin_func_t:
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*
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* A virtual method for the #hb_font_funcs_t of an #hb_font_t object.
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*
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* This method should retrieve the (X,Y) coordinates (in font units) of the
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* origin for a glyph, in vertical-direction text segments. Each coordinate
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* must be returned in an #hb_position_t output parameter.
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*
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**/
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typedef hb_font_get_glyph_origin_func_t hb_font_get_glyph_v_origin_func_t;
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typedef hb_position_t (*hb_font_get_glyph_kerning_func_t) (hb_font_t *font, void *font_data,
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@ -162,20 +338,59 @@ typedef hb_position_t (*hb_font_get_glyph_kerning_func_t) (hb_font_t *font, void
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typedef hb_font_get_glyph_kerning_func_t hb_font_get_glyph_h_kerning_func_t;
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/**
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* hb_font_get_glyph_extents_func_t:
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*
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* A virtual method for the #hb_font_funcs_t of an #hb_font_t object.
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*
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* This method should retrieve the extents for a specified glyph. Extents must be
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* returned in an #hb_glyph_extents output parameter.
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*
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**/
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typedef hb_bool_t (*hb_font_get_glyph_extents_func_t) (hb_font_t *font, void *font_data,
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hb_codepoint_t glyph,
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hb_glyph_extents_t *extents,
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void *user_data);
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/**
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* hb_font_get_glyph_contour_point_func_t:
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*
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* A virtual method for the #hb_font_funcs_t of an #hb_font_t object.
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*
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* This method should retrieve the (X,Y) coordinates (in font units) for a
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* specified contour point in a glyph. Each coordinate must be returned as
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* an #hb_position_t output parameter.
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*
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**/
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typedef hb_bool_t (*hb_font_get_glyph_contour_point_func_t) (hb_font_t *font, void *font_data,
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hb_codepoint_t glyph, unsigned int point_index,
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hb_position_t *x, hb_position_t *y,
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void *user_data);
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/**
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* hb_font_get_glyph_name_func_t:
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*
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* A virtual method for the #hb_font_funcs_t of an #hb_font_t object.
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*
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* This method should retrieve the glyph name that corresponds to a
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* glyph ID. The name should be returned in a string output parameter.
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*
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**/
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typedef hb_bool_t (*hb_font_get_glyph_name_func_t) (hb_font_t *font, void *font_data,
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hb_codepoint_t glyph,
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char *name, unsigned int size,
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void *user_data);
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/**
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* hb_font_get_glyph_from_name_func_t:
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*
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* A virtual method for the #hb_font_funcs_t of an #hb_font_t object.
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*
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* This method should retrieve the glyph ID that corresponds to a glyph-name
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* string.
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*
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**/
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typedef hb_bool_t (*hb_font_get_glyph_from_name_func_t) (hb_font_t *font, void *font_data,
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const char *name, int len, /* -1 means nul-terminated */
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hb_codepoint_t *glyph,
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@ -186,12 +401,12 @@ typedef hb_bool_t (*hb_font_get_glyph_from_name_func_t) (hb_font_t *font, void *
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/**
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* hb_font_funcs_set_font_h_extents_func:
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* @ffuncs: font functions.
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* @func: (closure user_data) (destroy destroy) (scope notified):
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* @user_data:
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* @destroy:
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*
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* @ffuncs: A font-function structure
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* @func: (closure user_data) (destroy destroy) (scope notified): The callback function to assign
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* @user_data: Data to pass to @func
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* @destroy: The function to call when @user_data is not needed anymore
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*
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* Sets the implementation function for #hb_font_get_font_h_extents_func_t.
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*
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* Since: 1.1.2
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**/
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@ -202,12 +417,12 @@ hb_font_funcs_set_font_h_extents_func (hb_font_funcs_t *ffuncs,
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/**
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* hb_font_funcs_set_font_v_extents_func:
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* @ffuncs: font functions.
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* @func: (closure user_data) (destroy destroy) (scope notified):
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* @user_data:
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* @destroy:
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*
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* @ffuncs: A font-function structure
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* @func: (closure user_data) (destroy destroy) (scope notified): The callback function to assign
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* @user_data: Data to pass to @func
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* @destroy: The function to call when @user_data is not needed anymore
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*
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* Sets the implementation function for #hb_font_get_font_v_extents_func_t.
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*
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* Since: 1.1.2
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**/
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@ -218,12 +433,12 @@ hb_font_funcs_set_font_v_extents_func (hb_font_funcs_t *ffuncs,
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/**
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* hb_font_funcs_set_nominal_glyph_func:
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* @ffuncs: font functions.
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* @func: (closure user_data) (destroy destroy) (scope notified):
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* @user_data:
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* @destroy:
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*
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* @ffuncs: A font-function structure
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* @func: (closure user_data) (destroy destroy) (scope notified): The callback function to assign
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* @user_data: Data to pass to @func
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* @destroy: The function to call when @user_data is not needed anymore
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*
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* Sets the implementation function for #hb_font_get_nominal_glyph_func_t.
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*
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* Since: 1.2.3
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**/
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@ -234,12 +449,12 @@ hb_font_funcs_set_nominal_glyph_func (hb_font_funcs_t *ffuncs,
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/**
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* hb_font_funcs_set_nominal_glyphs_func:
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* @ffuncs: font functions.
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* @func: (closure user_data) (destroy destroy) (scope notified):
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* @user_data:
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* @destroy:
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*
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* @ffuncs: A font-function structure
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* @func: (closure user_data) (destroy destroy) (scope notified): The callback function to assign
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* @user_data: Data to pass to @func
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* @destroy: The function to call when @user_data is not needed anymore
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*
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* Sets the implementation function for #hb_font_get_nominal_glyphs_func_t.
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*
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* Since: 2.0.0
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**/
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@ -250,12 +465,12 @@ hb_font_funcs_set_nominal_glyphs_func (hb_font_funcs_t *ffuncs,
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/**
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* hb_font_funcs_set_variation_glyph_func:
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* @ffuncs: font functions.
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* @func: (closure user_data) (destroy destroy) (scope notified):
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* @user_data:
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* @destroy:
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*
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* @ffuncs: A font-function structure
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* @func: (closure user_data) (destroy destroy) (scope notified): The callback function to assign
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* @user_data: Data to pass to @func
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* @destroy: The function to call when @user_data is not needed anymore
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*
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* Sets the implementation function for #hb_font_get_variation_glyph_func_t.
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*
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* Since: 1.2.3
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**/
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@ -266,12 +481,12 @@ hb_font_funcs_set_variation_glyph_func (hb_font_funcs_t *ffuncs,
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/**
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* hb_font_funcs_set_glyph_h_advance_func:
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* @ffuncs: font functions.
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* @func: (closure user_data) (destroy destroy) (scope notified):
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* @user_data:
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* @destroy:
|
||||
*
|
||||
* @ffuncs: A font-function structure
|
||||
* @func: (closure user_data) (destroy destroy) (scope notified): The callback function to assign
|
||||
* @user_data: Data to pass to @func
|
||||
* @destroy: The function to call when @user_data is not needed anymore
|
||||
*
|
||||
* Sets the implementation function for #hb_font_get_glyph_h_advance_func_t.
|
||||
*
|
||||
* Since: 0.9.2
|
||||
**/
|
||||
|
|
@ -282,12 +497,12 @@ hb_font_funcs_set_glyph_h_advance_func (hb_font_funcs_t *ffuncs,
|
|||
|
||||
/**
|
||||
* hb_font_funcs_set_glyph_v_advance_func:
|
||||
* @ffuncs: font functions.
|
||||
* @func: (closure user_data) (destroy destroy) (scope notified):
|
||||
* @user_data:
|
||||
* @destroy:
|
||||
*
|
||||
* @ffuncs: A font-function structure
|
||||
* @func: (closure user_data) (destroy destroy) (scope notified): The callback function to assign
|
||||
* @user_data: Data to pass to @func
|
||||
* @destroy: The function to call when @user_data is not needed anymore
|
||||
*
|
||||
* Sets the implementation function for #hb_font_get_glyph_v_advance_func_t.
|
||||
*
|
||||
* Since: 0.9.2
|
||||
**/
|
||||
|
|
@ -298,12 +513,12 @@ hb_font_funcs_set_glyph_v_advance_func (hb_font_funcs_t *ffuncs,
|
|||
|
||||
/**
|
||||
* hb_font_funcs_set_glyph_h_advances_func:
|
||||
* @ffuncs: font functions.
|
||||
* @func: (closure user_data) (destroy destroy) (scope notified):
|
||||
* @user_data:
|
||||
* @destroy:
|
||||
*
|
||||
* @ffuncs: A font-function structure
|
||||
* @func: (closure user_data) (destroy destroy) (scope notified): The callback function to assign
|
||||
* @user_data: Data to pass to @func
|
||||
* @destroy: The function to call when @user_data is not needed anymore
|
||||
*
|
||||
* Sets the implementation function for #hb_font_get_glyph_h_advances_func_t.
|
||||
*
|
||||
* Since: 1.8.6
|
||||
**/
|
||||
|
|
@ -314,12 +529,12 @@ hb_font_funcs_set_glyph_h_advances_func (hb_font_funcs_t *ffuncs,
|
|||
|
||||
/**
|
||||
* hb_font_funcs_set_glyph_v_advances_func:
|
||||
* @ffuncs: font functions.
|
||||
* @func: (closure user_data) (destroy destroy) (scope notified):
|
||||
* @user_data:
|
||||
* @destroy:
|
||||
*
|
||||
* @ffuncs: A font-function structure
|
||||
* @func: (closure user_data) (destroy destroy) (scope notified): The callback function to assign
|
||||
* @user_data: Data to pass to @func
|
||||
* @destroy: The function to call when @user_data is not needed anymore
|
||||
*
|
||||
* Sets the implementation function for #hb_font_get_glyph_v_advances_func_t.
|
||||
*
|
||||
* Since: 1.8.6
|
||||
**/
|
||||
|
|
@ -330,12 +545,12 @@ hb_font_funcs_set_glyph_v_advances_func (hb_font_funcs_t *ffuncs,
|
|||
|
||||
/**
|
||||
* hb_font_funcs_set_glyph_h_origin_func:
|
||||
* @ffuncs: font functions.
|
||||
* @func: (closure user_data) (destroy destroy) (scope notified):
|
||||
* @user_data:
|
||||
* @destroy:
|
||||
*
|
||||
* @ffuncs: A font-function structure
|
||||
* @func: (closure user_data) (destroy destroy) (scope notified): The callback function to assign
|
||||
* @user_data: Data to pass to @func
|
||||
* @destroy: The function to call when @user_data is not needed anymore
|
||||
*
|
||||
* Sets the implementation function for #hb_font_get_glyph_h_origin_func_t.
|
||||
*
|
||||
* Since: 0.9.2
|
||||
**/
|
||||
|
|
@ -346,12 +561,12 @@ hb_font_funcs_set_glyph_h_origin_func (hb_font_funcs_t *ffuncs,
|
|||
|
||||
/**
|
||||
* hb_font_funcs_set_glyph_v_origin_func:
|
||||
* @ffuncs: font functions.
|
||||
* @func: (closure user_data) (destroy destroy) (scope notified):
|
||||
* @user_data:
|
||||
* @destroy:
|
||||
*
|
||||
* @ffuncs: A font-function structure
|
||||
* @func: (closure user_data) (destroy destroy) (scope notified): The callback function to assign
|
||||
* @user_data: Data to pass to @func
|
||||
* @destroy: The function to call when @user_data is not needed anymore
|
||||
*
|
||||
* Sets the implementation function for #hb_font_get_glyph_v_origin_func_t.
|
||||
*
|
||||
* Since: 0.9.2
|
||||
**/
|
||||
|
|
@ -378,12 +593,12 @@ hb_font_funcs_set_glyph_h_kerning_func (hb_font_funcs_t *ffuncs,
|
|||
|
||||
/**
|
||||
* hb_font_funcs_set_glyph_extents_func:
|
||||
* @ffuncs: font functions.
|
||||
* @func: (closure user_data) (destroy destroy) (scope notified):
|
||||
* @user_data:
|
||||
* @destroy:
|
||||
*
|
||||
* @ffuncs: A font-function structure
|
||||
* @func: (closure user_data) (destroy destroy) (scope notified): The callback function to assign
|
||||
* @user_data: Data to pass to @func
|
||||
* @destroy: The function to call when @user_data is not needed anymore
|
||||
*
|
||||
* Sets the implementation function for #hb_font_get_glyph_extents_func_t.
|
||||
*
|
||||
* Since: 0.9.2
|
||||
**/
|
||||
|
|
@ -394,12 +609,12 @@ hb_font_funcs_set_glyph_extents_func (hb_font_funcs_t *ffuncs,
|
|||
|
||||
/**
|
||||
* hb_font_funcs_set_glyph_contour_point_func:
|
||||
* @ffuncs: font functions.
|
||||
* @func: (closure user_data) (destroy destroy) (scope notified):
|
||||
* @user_data:
|
||||
* @destroy:
|
||||
*
|
||||
* @ffuncs: A font-function structure
|
||||
* @func: (closure user_data) (destroy destroy) (scope notified): The callback function to assign
|
||||
* @user_data: Data to pass to @func
|
||||
* @destroy: The function to call when @user_data is not needed anymore
|
||||
*
|
||||
* Sets the implementation function for #hb_font_get_glyph_contour_point_func_t.
|
||||
*
|
||||
* Since: 0.9.2
|
||||
**/
|
||||
|
|
@ -410,12 +625,12 @@ hb_font_funcs_set_glyph_contour_point_func (hb_font_funcs_t *ffuncs,
|
|||
|
||||
/**
|
||||
* hb_font_funcs_set_glyph_name_func:
|
||||
* @ffuncs: font functions.
|
||||
* @func: (closure user_data) (destroy destroy) (scope notified):
|
||||
* @user_data:
|
||||
* @destroy:
|
||||
*
|
||||
* @ffuncs: A font-function structure
|
||||
* @func: (closure user_data) (destroy destroy) (scope notified): The callback function to assign
|
||||
* @user_data: Data to pass to @func
|
||||
* @destroy: The function to call when @user_data is not needed anymore
|
||||
*
|
||||
* Sets the implementation function for #hb_font_get_glyph_name_func_t.
|
||||
*
|
||||
* Since: 0.9.2
|
||||
**/
|
||||
|
|
@ -426,12 +641,12 @@ hb_font_funcs_set_glyph_name_func (hb_font_funcs_t *ffuncs,
|
|||
|
||||
/**
|
||||
* hb_font_funcs_set_glyph_from_name_func:
|
||||
* @ffuncs: font functions.
|
||||
* @func: (closure user_data) (destroy destroy) (scope notified):
|
||||
* @user_data:
|
||||
* @destroy:
|
||||
*
|
||||
* @ffuncs: A font-function structure
|
||||
* @func: (closure user_data) (destroy destroy) (scope notified): The callback function to assign
|
||||
* @user_data: Data to pass to @func
|
||||
* @destroy: The function to call when @user_data is not needed anymore
|
||||
*
|
||||
* Sets the implementation function for #hb_font_get_glyph_from_name_func_t.
|
||||
*
|
||||
* Since: 0.9.2
|
||||
**/
|
||||
|
|
|
|||
Loading…
Reference in New Issue