/* * Copyright © 2017 Google, Inc. * * This is part of HarfBuzz, a text shaping library. * * Permission is hereby granted, without written agreement and without * license or royalty fees, to use, copy, modify, and distribute this * software and its documentation for any purpose, provided that the * above copyright notice and the following two paragraphs appear in * all copies of this software. * * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH * DAMAGE. * * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. * * Google Author(s): Behdad Esfahbod */ #include "hb.hh" #ifndef HB_NO_VAR #include "hb-ot-var.h" #include "hb-ot-var-avar-table.hh" #include "hb-ot-var-fvar-table.hh" #include "hb-ot-var-mvar-table.hh" /** * 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 */ /** * hb_ot_var_has_data: * @face: The #hb_face_t to work on * * Tests whether a face includes any OpenType variation data in the `fvar` table. * * Return value: `true` if data found, `false` otherwise * * Since: 1.4.2 **/ hb_bool_t hb_ot_var_has_data (hb_face_t *face) { … } /** * 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) { … } #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, unsigned int start_offset, unsigned int *axes_count /* IN/OUT */, hb_ot_var_axis_t *axes_array /* OUT */) { … } /** * 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, hb_tag_t axis_tag, unsigned int *axis_index, hb_ot_var_axis_t *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 */) { … } /** * 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) { … } /* * 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) { … } /** * 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) { … } /** * 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) { … } /** * 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 */) { … } /** * 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 **/ void hb_ot_var_normalize_variations (hb_face_t *face, const hb_variation_t *variations, /* IN */ unsigned int variations_length, int *coords, /* OUT */ unsigned int 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 **/ void hb_ot_var_normalize_coords (hb_face_t *face, unsigned int coords_length, const float *design_coords, /* IN */ int *normalized_coords /* OUT */) { … } #endif
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