147 lines
4.2 KiB
C
147 lines
4.2 KiB
C
/*
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* Copyright © 2016 Google, Inc.
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* Copyright © 2018 Khaled Hosny
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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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#if !defined(HB_OT_H_IN) && !defined(HB_NO_SINGLE_HEADER_ERROR)
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#error "Include <hb-ot.h> instead."
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#endif
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#ifndef HB_OT_COLOR_H
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#define HB_OT_COLOR_H
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#include "hb.h"
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#include "hb-ot-name.h"
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HB_BEGIN_DECLS
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/*
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* Color palettes.
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*/
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HB_EXTERN hb_bool_t
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hb_ot_color_has_palettes (hb_face_t *face);
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HB_EXTERN unsigned int
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hb_ot_color_palette_get_count (hb_face_t *face);
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HB_EXTERN hb_ot_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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HB_EXTERN hb_ot_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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* hb_ot_color_palette_flags_t:
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* @HB_OT_COLOR_PALETTE_FLAG_DEFAULT: Default indicating that there is nothing special
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* to note about a color palette.
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* @HB_OT_COLOR_PALETTE_FLAG_USABLE_WITH_LIGHT_BACKGROUND: Flag indicating that the color
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* palette is appropriate to use when displaying the font on a light background such as white.
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* @HB_OT_COLOR_PALETTE_FLAG_USABLE_WITH_DARK_BACKGROUND: Flag indicating that the color
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* palette is appropriate to use when displaying the font on a dark background such as black.
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*
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* Flags that describe the properties of color palette.
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*
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* Since: 2.1.0
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*/
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typedef enum { /*< flags >*/
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HB_OT_COLOR_PALETTE_FLAG_DEFAULT = 0x00000000u,
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HB_OT_COLOR_PALETTE_FLAG_USABLE_WITH_LIGHT_BACKGROUND = 0x00000001u,
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HB_OT_COLOR_PALETTE_FLAG_USABLE_WITH_DARK_BACKGROUND = 0x00000002u
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} hb_ot_color_palette_flags_t;
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HB_EXTERN 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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HB_EXTERN unsigned int
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hb_ot_color_palette_get_colors (hb_face_t *face,
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unsigned int palette_index,
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unsigned int start_offset,
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unsigned int *color_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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* Color layers.
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*/
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HB_EXTERN hb_bool_t
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hb_ot_color_has_layers (hb_face_t *face);
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/**
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* hb_ot_color_layer_t:
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* @glyph: the glyph ID of the layer
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* @color_index: the palette color index of the layer
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*
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* Pairs of glyph and color index.
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*
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* A color index of 0xFFFF does not refer to a palette
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* color, but indicates that the foreground color should
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* be used.
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*
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* Since: 2.1.0
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**/
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typedef struct hb_ot_color_layer_t {
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hb_codepoint_t glyph;
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unsigned int color_index;
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} hb_ot_color_layer_t;
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HB_EXTERN 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 *layer_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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* SVG
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*/
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HB_EXTERN hb_bool_t
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hb_ot_color_has_svg (hb_face_t *face);
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HB_EXTERN hb_blob_t *
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hb_ot_color_glyph_reference_svg (hb_face_t *face, hb_codepoint_t glyph);
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/*
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* PNG: CBDT or sbix
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*/
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HB_EXTERN hb_bool_t
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hb_ot_color_has_png (hb_face_t *face);
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HB_EXTERN hb_blob_t *
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hb_ot_color_glyph_reference_png (hb_font_t *font, hb_codepoint_t glyph);
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HB_END_DECLS
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#endif /* HB_OT_COLOR_H */
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