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Diffstat (limited to '')
| -rw-r--r-- | gfx/harfbuzz/src/hb-ot-var.h | 191 |
1 files changed, 191 insertions, 0 deletions
diff --git a/gfx/harfbuzz/src/hb-ot-var.h b/gfx/harfbuzz/src/hb-ot-var.h new file mode 100644 index 0000000000..05147cc25e --- /dev/null +++ b/gfx/harfbuzz/src/hb-ot-var.h @@ -0,0 +1,191 @@ +/* + * 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. + * + * Red Hat Author(s): Behdad Esfahbod + */ + +#if !defined(HB_OT_H_IN) && !defined(HB_NO_SINGLE_HEADER_ERROR) +#error "Include <hb-ot.h> instead." +#endif + +#ifndef HB_OT_VAR_H +#define HB_OT_VAR_H + +#include "hb.h" + +HB_BEGIN_DECLS + +/** + * HB_OT_TAG_VAR_AXIS_ITALIC: + * + * Registered tag for the roman/italic axis. + */ +#define HB_OT_TAG_VAR_AXIS_ITALIC HB_TAG('i','t','a','l') + +/** + * HB_OT_TAG_VAR_AXIS_OPTICAL_SIZE: + * + * Registered tag for the optical-size axis. + * <note>Note: The optical-size axis supersedes the OpenType `size` feature.</note> + */ +#define HB_OT_TAG_VAR_AXIS_OPTICAL_SIZE HB_TAG('o','p','s','z') + +/** + * HB_OT_TAG_VAR_AXIS_SLANT: + * + * Registered tag for the slant axis + */ +#define HB_OT_TAG_VAR_AXIS_SLANT HB_TAG('s','l','n','t') + +/** + * HB_OT_TAG_VAR_AXIS_WIDTH: + * + * Registered tag for the width axis. + */ +#define HB_OT_TAG_VAR_AXIS_WIDTH HB_TAG('w','d','t','h') + +/** + * HB_OT_TAG_VAR_AXIS_WEIGHT: + * + * Registered tag for the weight axis. + */ +#define HB_OT_TAG_VAR_AXIS_WEIGHT HB_TAG('w','g','h','t') + + +/* + * fvar / avar + */ + +HB_EXTERN hb_bool_t +hb_ot_var_has_data (hb_face_t *face); + + +/* + * Variation axes. + */ + + +HB_EXTERN unsigned int +hb_ot_var_get_axis_count (hb_face_t *face); + +/** + * hb_ot_var_axis_flags_t: + * @HB_OT_VAR_AXIS_FLAG_HIDDEN: The axis should not be exposed directly in user interfaces. + * + * Flags for #hb_ot_var_axis_info_t. + * + * Since: 2.2.0 + */ +typedef enum { /*< flags >*/ + HB_OT_VAR_AXIS_FLAG_HIDDEN = 0x00000001u, + + /*< private >*/ + _HB_OT_VAR_AXIS_FLAG_MAX_VALUE= HB_TAG_MAX_SIGNED /*< skip >*/ +} hb_ot_var_axis_flags_t; + +/** + * hb_ot_var_axis_info_t: + * @axis_index: Index of the axis in the variation-axis array + * @tag: The #hb_tag_t tag identifying the design variation of the axis + * @name_id: The `name` table Name ID that provides display names for the axis + * @flags: The #hb_ot_var_axis_flags_t flags for the axis + * @min_value: The minimum value on the variation axis that the font covers + * @default_value: The position on the variation axis corresponding to the font's defaults + * @max_value: The maximum value on the variation axis that the font covers + * + * Data type for holding variation-axis values. + * + * The minimum, default, and maximum values are in un-normalized, user scales. + * + * <note>Note: at present, the only flag defined for @flags is + * #HB_OT_VAR_AXIS_FLAG_HIDDEN.</note> + * + * Since: 2.2.0 + */ +typedef struct hb_ot_var_axis_info_t { + unsigned int axis_index; + hb_tag_t tag; + hb_ot_name_id_t name_id; + hb_ot_var_axis_flags_t flags; + float min_value; + float default_value; + float max_value; + /*< private >*/ + unsigned int reserved; +} hb_ot_var_axis_info_t; + +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_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_EXTERN unsigned int +hb_ot_var_get_named_instance_count (hb_face_t *face); + +HB_EXTERN hb_ot_name_id_t +hb_ot_var_named_instance_get_subfamily_name_id (hb_face_t *face, + unsigned int instance_index); + +HB_EXTERN hb_ot_name_id_t +hb_ot_var_named_instance_get_postscript_name_id (hb_face_t *face, + unsigned int instance_index); + +HB_EXTERN 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 */); + + +/* + * Conversions. + */ + +HB_EXTERN 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_EXTERN void +hb_ot_var_normalize_coords (hb_face_t *face, + unsigned int coords_length, + const float *design_coords, /* IN */ + int *normalized_coords /* OUT */); + + +HB_END_DECLS + +#endif /* HB_OT_VAR_H */ |