264 lines
7.1 KiB
C++
264 lines
7.1 KiB
C++
/*
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* Copyright © 2016 Google, Inc.
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* Copyright © 2018 Ebrahim Byagowi
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*
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* This is part of HarfBuzz, a text shaping library.
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*
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* Permission is hereby granted, without written agreement and without
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* license or royalty fees, to use, copy, modify, and distribute this
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* software and its documentation for any purpose, provided that the
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* above copyright notice and the following two paragraphs appear in
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* all copies of this software.
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*
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* IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
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* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
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* ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
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* IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
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* DAMAGE.
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*
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* THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
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* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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* FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
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* ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
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* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
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*
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* Google Author(s): Sascha Brawer, Behdad Esfahbod
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*/
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#include "hb-open-type.hh"
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#include "hb-ot-color-cbdt-table.hh"
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#include "hb-ot-color-colr-table.hh"
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#include "hb-ot-color-cpal-table.hh"
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#include "hb-ot-color-sbix-table.hh"
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#include "hb-ot-color-svg-table.hh"
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#include "hb-ot-face.hh"
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#include "hb-ot.h"
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#include <stdlib.h>
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#include <string.h>
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#include "hb-ot-layout.hh"
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static inline const OT::COLR&
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_get_colr (hb_face_t *face)
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{
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if (unlikely (!hb_ot_shaper_face_data_ensure (face))) return Null(OT::COLR);
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return *(hb_ot_face_data (face)->COLR.get ());
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}
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static inline const OT::CPAL&
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_get_cpal (hb_face_t *face)
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{
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if (unlikely (!hb_ot_shaper_face_data_ensure (face))) return Null(OT::CPAL);
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return *(hb_ot_face_data (face)->CPAL.get ());
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}
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#if 0
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static inline const OT::CBDT_accelerator_t&
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_get_cbdt (hb_face_t *face)
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{
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if (unlikely (!hb_ot_shaper_face_data_ensure (face))) return Null(OT::CBDT_accelerator_t);
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return *(hb_ot_face_data (face)->CBDT.get ());
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}
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static inline const OT::sbix&
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_get_sbix (hb_face_t *face)
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{
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if (unlikely (!hb_ot_shaper_face_data_ensure (face))) return Null(OT::sbix);
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return *(hb_ot_face_data (face)->sbix.get ());
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}
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static inline const OT::SVG&
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_get_svg (hb_face_t *face)
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{
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if (unlikely (!hb_ot_shaper_face_data_ensure (face))) return Null(OT::SVG);
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return *(hb_ot_face_data (face)->SVG.get ());
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}
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#endif
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/*
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* CPAL
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*/
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/**
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* hb_ot_color_has_palettes:
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* @face: a font face.
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*
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* Returns: whether CPAL table is available.
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*
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* Since: REPLACEME
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*/
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hb_bool_t
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hb_ot_color_has_palettes (hb_face_t *face)
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{
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return _get_cpal (face).has_data ();
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}
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/**
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* hb_ot_color_palette_get_count:
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* @face: a font face.
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*
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* Returns: the number of color palettes in @face, or zero if @face has
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* no colors.
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*
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* Since: REPLACEME
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*/
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unsigned int
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hb_ot_color_palette_get_count (hb_face_t *face)
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{
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return _get_cpal (face).get_palette_count ();
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}
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/**
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* hb_ot_color_palette_get_name_id:
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* @face: a font face.
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* @palette: the index of the color palette whose name is being requested.
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*
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* Retrieves the name id of a color palette. For example, a color font can
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* have themed palettes like "Spring", "Summer", "Fall", and "Winter".
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*
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* Returns: an identifier within @face's `name` table.
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* If the requested palette has no name the result is #HB_NAME_ID_INVALID.
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*
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* Since: REPLACEME
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*/
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hb_name_id_t
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hb_ot_color_palette_get_name_id (hb_face_t *face,
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unsigned int palette_index)
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{
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return _get_cpal (face).get_palette_name_id (palette_index);
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}
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/**
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* hb_ot_color_palette_color_get_name_id:
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* @face: a font face.
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* @color_index:
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*
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* Returns: Name ID associated with a palette entry, e.g. eye color
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*
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* Since: REPLACEME
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*/
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hb_name_id_t
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hb_ot_color_palette_color_get_name_id (hb_face_t *face,
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unsigned int color_index)
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{
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return _get_cpal (face).get_color_name_id (color_index);
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}
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/**
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* hb_ot_color_palette_get_flags:
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* @face: a font face
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* @palette_index: the index of the color palette whose flags are being requested
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*
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* Returns: the flags for the requested color palette.
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*
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* Since: REPLACEME
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*/
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hb_ot_color_palette_flags_t
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hb_ot_color_palette_get_flags (hb_face_t *face,
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unsigned int palette_index)
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{
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const OT::CPAL& cpal = _get_cpal(face);
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return cpal.get_palette_flags (palette_index);
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}
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/**
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* hb_ot_color_palette_get_colors:
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* @face: a font face.
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* @palette_index:the index of the color palette whose colors
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* are being requested.
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* @start_offset: the index of the first color being requested.
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* @color_count: (inout) (optional): on input, how many colors
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* can be maximally stored into the @colors array;
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* on output, how many colors were actually stored.
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* @colors: (array length=color_count) (out) (optional):
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* an array of #hb_color_t records. After calling
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* this function, @colors will be filled with
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* the palette colors. If @colors is NULL, the function
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* will just return the number of total colors
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* without storing any actual colors; this can be used
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* for allocating a buffer of suitable size before calling
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* hb_ot_color_palette_get_colors() a second time.
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*
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* Retrieves the colors in a color palette.
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*
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* Returns: the total number of colors in the palette.
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*
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* Since: REPLACEME
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*/
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unsigned int
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hb_ot_color_palette_get_colors (hb_face_t *face,
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unsigned int palette_index, /* default=0 */
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unsigned int start_offset,
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unsigned int *colors_count /* IN/OUT. May be NULL. */,
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hb_color_t *colors /* OUT. May be NULL. */)
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{
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const OT::CPAL& cpal = _get_cpal(face);
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if (unlikely (palette_index >= cpal.get_palette_count ()))
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{
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if (colors_count) *colors_count = 0;
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return 0;
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}
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unsigned int num_results = 0;
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if (colors_count)
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{
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unsigned int platte_count;
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platte_count = MIN<unsigned int>(*colors_count,
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cpal.get_color_count () - start_offset);
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for (unsigned int i = 0; i < platte_count; i++)
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{
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if (cpal.get_color_record_argb(start_offset + i, palette_index, &colors[num_results]))
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++num_results;
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}
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}
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if (likely (colors_count)) *colors_count = num_results;
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return cpal.get_color_count ();
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}
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/*
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* COLR
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*/
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/**
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* hb_ot_color_has_layers:
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* @face: a font face.
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*
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* Returns: whether COLR table is available.
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*
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* Since: REPLACEME
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*/
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hb_bool_t
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hb_ot_color_has_layers (hb_face_t *face)
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{
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return _get_colr (face).has_data ();
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}
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/**
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* hb_ot_color_glyph_get_layers:
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* @face: a font face.
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* @glyph:
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* @start_offset:
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* @count: (inout) (optional):
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* @layers: (array length=count) (out) (optional):
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*
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* Returns:
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*
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* Since: REPLACEME
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*/
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unsigned int
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hb_ot_color_glyph_get_layers (hb_face_t *face,
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hb_codepoint_t glyph,
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unsigned int start_offset,
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unsigned int *count, /* IN/OUT. May be NULL. */
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hb_ot_color_layer_t *layers /* OUT. May be NULL. */)
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{
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const OT::COLR& colr = _get_colr (face);
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return colr.get_glyph_layers (glyph, start_offset, count, layers);
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}
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