diff options
Diffstat (limited to 'src/3rdparty/harfbuzz-ng/src/hb-ot-var.cc')
| -rw-r--r-- | src/3rdparty/harfbuzz-ng/src/hb-ot-var.cc | 245 |
1 files changed, 207 insertions, 38 deletions
diff --git a/src/3rdparty/harfbuzz-ng/src/hb-ot-var.cc b/src/3rdparty/harfbuzz-ng/src/hb-ot-var.cc index 90ba0bd02c..f000f27263 100644 --- a/src/3rdparty/harfbuzz-ng/src/hb-ot-var.cc +++ b/src/3rdparty/harfbuzz-ng/src/hb-ot-var.cc @@ -24,66 +24,78 @@ * Google Author(s): Behdad Esfahbod */ -#include "hb-open-type-private.hh" +#include "hb.hh" + +#ifndef HB_NO_VAR + +#include "hb-ot-var.h" -#include "hb-ot-layout-private.hh" #include "hb-ot-var-avar-table.hh" #include "hb-ot-var-fvar-table.hh" #include "hb-ot-var-mvar-table.hh" -#include "hb-ot-var.h" + + +/** + * SECTION:hb-ot-var + * @title: hb-ot-var + * @short_description: OpenType Font Variations + * @include: hb-ot.h + * + * Functions for fetching information about OpenType Variable Fonts. + **/ + /* * fvar/avar */ -static inline const OT::fvar& -_get_fvar (hb_face_t *face) -{ - if (unlikely (!hb_ot_shaper_face_data_ensure (face))) return OT::Null(OT::fvar); - hb_ot_layout_t * layout = hb_ot_layout_from_face (face); - return *(layout->fvar.get ()); -} -static inline const OT::avar& -_get_avar (hb_face_t *face) -{ - if (unlikely (!hb_ot_shaper_face_data_ensure (face))) return OT::Null(OT::avar); - hb_ot_layout_t * layout = hb_ot_layout_from_face (face); - return *(layout->avar.get ()); -} /** * hb_ot_var_has_data: - * @face: #hb_face_t to test + * @face: The #hb_face_t to work on * - * This function allows to verify the presence of OpenType variation data on the face. - * Alternatively, use hb_ot_var_get_axis_count(). + * Tests whether a face includes any OpenType variation data in the `fvar` table. * - * Return value: true if face has a `fvar' table and false otherwise + * Return value: `true` if data found, `false` otherwise * * Since: 1.4.2 **/ hb_bool_t hb_ot_var_has_data (hb_face_t *face) { - return &_get_fvar (face) != &OT::Null(OT::fvar); + return face->table.fvar->has_data (); } /** * hb_ot_var_get_axis_count: + * @face: The #hb_face_t to work on + * + * Fetches the number of OpenType variation axes included in the face. + * + * Return value: the number of variation axes defined * * Since: 1.4.2 **/ unsigned int hb_ot_var_get_axis_count (hb_face_t *face) { - const OT::fvar &fvar = _get_fvar (face); - return fvar.get_axis_count (); + return face->table.fvar->get_axis_count (); } +#ifndef HB_DISABLE_DEPRECATED /** * hb_ot_var_get_axes: + * @face: #hb_face_t to work upon + * @start_offset: offset of the first lookup to retrieve + * @axes_count: (inout) (optional): Input = the maximum number of variation axes to return; + * Output = the actual number of variation axes returned (may be zero) + * @axes_array: (out caller-allocates) (array length=axes_count): The array of variation axes found + * + * Fetches a list of all variation axes in the specified face. The list returned will begin + * at the offset provided. * * Since: 1.4.2 + * Deprecated: 2.2.0: use hb_ot_var_get_axis_infos() instead **/ unsigned int hb_ot_var_get_axes (hb_face_t *face, @@ -91,14 +103,21 @@ hb_ot_var_get_axes (hb_face_t *face, unsigned int *axes_count /* IN/OUT */, hb_ot_var_axis_t *axes_array /* OUT */) { - const OT::fvar &fvar = _get_fvar (face); - return fvar.get_axis_infos (start_offset, axes_count, axes_array); + return face->table.fvar->get_axes_deprecated (start_offset, axes_count, axes_array); } /** * hb_ot_var_find_axis: + * @face: #hb_face_t to work upon + * @axis_tag: The #hb_tag_t of the variation axis to query + * @axis_index: The index of the variation axis + * @axis_info: (out): The #hb_ot_var_axis_info_t of the axis tag queried + * + * Fetches the variation-axis information corresponding to the specified axis tag + * in the specified face. * * Since: 1.4.2 + * Deprecated: 2.2.0 - use hb_ot_var_find_axis_info() instead **/ hb_bool_t hb_ot_var_find_axis (hb_face_t *face, @@ -106,13 +125,148 @@ hb_ot_var_find_axis (hb_face_t *face, unsigned int *axis_index, hb_ot_var_axis_t *axis_info) { - const OT::fvar &fvar = _get_fvar (face); - return fvar.find_axis (axis_tag, axis_index, axis_info); + return face->table.fvar->find_axis_deprecated (axis_tag, axis_index, axis_info); +} +#endif + +/** + * hb_ot_var_get_axis_infos: + * @face: #hb_face_t to work upon + * @start_offset: offset of the first lookup to retrieve + * @axes_count: (inout) (optional): Input = the maximum number of variation axes to return; + * Output = the actual number of variation axes returned (may be zero) + * @axes_array: (out caller-allocates) (array length=axes_count): The array of variation axes found + * + * Fetches a list of all variation axes in the specified face. The list returned will begin + * at the offset provided. + * + * Return value: the number of variation axes in the face + * + * Since: 2.2.0 + **/ +HB_EXTERN unsigned int +hb_ot_var_get_axis_infos (hb_face_t *face, + unsigned int start_offset, + unsigned int *axes_count /* IN/OUT */, + hb_ot_var_axis_info_t *axes_array /* OUT */) +{ + return face->table.fvar->get_axis_infos (start_offset, axes_count, axes_array); +} + +/** + * hb_ot_var_find_axis_info: + * @face: #hb_face_t to work upon + * @axis_tag: The #hb_tag_t of the variation axis to query + * @axis_info: (out): The #hb_ot_var_axis_info_t of the axis tag queried + * + * Fetches the variation-axis information corresponding to the specified axis tag + * in the specified face. + * + * Return value: `true` if data found, `false` otherwise + * + * Since: 2.2.0 + **/ +HB_EXTERN hb_bool_t +hb_ot_var_find_axis_info (hb_face_t *face, + hb_tag_t axis_tag, + hb_ot_var_axis_info_t *axis_info) +{ + return face->table.fvar->find_axis_info (axis_tag, axis_info); +} + + +/* + * Named instances. + */ + +/** + * hb_ot_var_get_named_instance_count: + * @face: The #hb_face_t to work on + * + * Fetches the number of named instances included in the face. + * + * Return value: the number of named instances defined + * + * Since: 2.2.0 + **/ +unsigned int +hb_ot_var_get_named_instance_count (hb_face_t *face) +{ + return face->table.fvar->get_instance_count (); +} + +/** + * hb_ot_var_named_instance_get_subfamily_name_id: + * @face: The #hb_face_t to work on + * @instance_index: The index of the named instance to query + * + * Fetches the `name` table Name ID that provides display names for + * the "Subfamily name" defined for the given named instance in the face. + * + * Return value: the Name ID found for the Subfamily name + * + * Since: 2.2.0 + **/ +hb_ot_name_id_t +hb_ot_var_named_instance_get_subfamily_name_id (hb_face_t *face, + unsigned int instance_index) +{ + return face->table.fvar->get_instance_subfamily_name_id (instance_index); +} + +/** + * hb_ot_var_named_instance_get_postscript_name_id: + * @face: The #hb_face_t to work on + * @instance_index: The index of the named instance to query + * + * Fetches the `name` table Name ID that provides display names for + * the "PostScript name" defined for the given named instance in the face. + * + * Return value: the Name ID found for the PostScript name + * + * Since: 2.2.0 + **/ +hb_ot_name_id_t +hb_ot_var_named_instance_get_postscript_name_id (hb_face_t *face, + unsigned int instance_index) +{ + return face->table.fvar->get_instance_postscript_name_id (instance_index); +} + +/** + * hb_ot_var_named_instance_get_design_coords: + * @face: The #hb_face_t to work on + * @instance_index: The index of the named instance to query + * @coords_length: (inout) (optional): Input = the maximum number of coordinates to return; + * Output = the actual number of coordinates returned (may be zero) + * @coords: (out) (array length=coords_length): The array of coordinates found for the query + * + * Fetches the design-space coordinates corresponding to the given + * named instance in the face. + * + * Return value: the number of variation axes in the face + * + * Since: 2.2.0 + **/ +unsigned int +hb_ot_var_named_instance_get_design_coords (hb_face_t *face, + unsigned int instance_index, + unsigned int *coords_length, /* IN/OUT */ + float *coords /* OUT */) +{ + return face->table.fvar->get_instance_coords (instance_index, coords_length, coords); } /** * hb_ot_var_normalize_variations: + * @face: The #hb_face_t to work on + * @variations: The array of variations to normalize + * @variations_length: The number of variations to normalize + * @coords: (out) (array length=coords_length): The array of normalized coordinates + * @coords_length: The length of the coordinate array + * + * Normalizes all of the coordinates in the given list of variation axes. * * Since: 1.4.2 **/ @@ -126,21 +280,34 @@ hb_ot_var_normalize_variations (hb_face_t *face, for (unsigned int i = 0; i < coords_length; i++) coords[i] = 0; - const OT::fvar &fvar = _get_fvar (face); + const OT::fvar &fvar = *face->table.fvar; for (unsigned int i = 0; i < variations_length; i++) { - unsigned int axis_index; - if (hb_ot_var_find_axis (face, variations[i].tag, &axis_index, nullptr) && - axis_index < coords_length) - coords[axis_index] = fvar.normalize_axis_value (axis_index, variations[i].value); + hb_ot_var_axis_info_t info; + if (hb_ot_var_find_axis_info (face, variations[i].tag, &info) && + info.axis_index < coords_length) + coords[info.axis_index] = fvar.normalize_axis_value (info.axis_index, variations[i].value); } - const OT::avar &avar = _get_avar (face); - avar.map_coords (coords, coords_length); + face->table.avar->map_coords (coords, coords_length); } /** * hb_ot_var_normalize_coords: + * @face: The #hb_face_t to work on + * @coords_length: The length of the coordinate array + * @design_coords: The design-space coordinates to normalize + * @normalized_coords: (out): The normalized coordinates + * + * Normalizes the given design-space coordinates. The minimum and maximum + * values for the axis are mapped to the interval [-1,1], with the default + * axis value mapped to 0. + * + * The normalized values have 14 bits of fixed-point sub-integer precision as per + * OpenType specification. + * + * Any additional scaling defined in the face's `avar` table is also + * applied, as described at https://docs.microsoft.com/en-us/typography/opentype/spec/avar * * Since: 1.4.2 **/ @@ -150,10 +317,12 @@ hb_ot_var_normalize_coords (hb_face_t *face, const float *design_coords, /* IN */ int *normalized_coords /* OUT */) { - const OT::fvar &fvar = _get_fvar (face); + const OT::fvar &fvar = *face->table.fvar; for (unsigned int i = 0; i < coords_length; i++) normalized_coords[i] = fvar.normalize_axis_value (i, design_coords[i]); - const OT::avar &avar = _get_avar (face); - avar.map_coords (normalized_coords, coords_length); + face->table.avar->map_coords (normalized_coords, coords_length); } + + +#endif |