1 /*
2 * Copyright © 2016 Google, Inc.
3 * Copyright © 2018 Khaled Hosny
4 * Copyright © 2018 Ebrahim Byagowi
5 *
6 * This is part of HarfBuzz, a text shaping library.
7 *
8 * Permission is hereby granted, without written agreement and without
9 * license or royalty fees, to use, copy, modify, and distribute this
10 * software and its documentation for any purpose, provided that the
11 * above copyright notice and the following two paragraphs appear in
12 * all copies of this software.
13 *
14 * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
15 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
16 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
17 * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
18 * DAMAGE.
19 *
20 * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
21 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
22 * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
23 * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
24 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
25 *
26 * Google Author(s): Sascha Brawer, Behdad Esfahbod
27 */
28
29 #ifndef HB_OT_H_IN
30 #error "Include <hb-ot.h> instead."
31 #endif
32
33 #ifndef HB_OT_COLOR_H
34 #define HB_OT_COLOR_H
35
36 #include "hb.h"
37 #include "hb-ot-name.h"
38
39 HB_BEGIN_DECLS
40
41
42 /*
43 * Color palettes.
44 */
45
46 HB_EXTERN hb_bool_t
47 hb_ot_color_has_palettes (hb_face_t *face);
48
49 HB_EXTERN unsigned int
50 hb_ot_color_palette_get_count (hb_face_t *face);
51
52 HB_EXTERN hb_ot_name_id_t
53 hb_ot_color_palette_get_name_id (hb_face_t *face,
54 unsigned int palette_index);
55
56 HB_EXTERN hb_ot_name_id_t
57 hb_ot_color_palette_color_get_name_id (hb_face_t *face,
58 unsigned int color_index);
59
60 /**
61 * hb_ot_color_palette_flags_t:
62 * @HB_OT_COLOR_PALETTE_FLAG_DEFAULT: default indicating that there is nothing special
63 * to note about a color palette.
64 * @HB_OT_COLOR_PALETTE_FLAG_USABLE_WITH_LIGHT_BACKGROUND: flag indicating that the color
65 * palette is appropriate to use when displaying the font on a light background such as white.
66 * @HB_OT_COLOR_PALETTE_FLAG_USABLE_WITH_DARK_BACKGROUND: flag indicating that the color
67 * palette is appropriate to use when displaying the font on a dark background such as black.
68 *
69 * Since: 2.1.0
70 */
71 typedef enum { /*< flags >*/
72 HB_OT_COLOR_PALETTE_FLAG_DEFAULT = 0x00000000u,
73 HB_OT_COLOR_PALETTE_FLAG_USABLE_WITH_LIGHT_BACKGROUND = 0x00000001u,
74 HB_OT_COLOR_PALETTE_FLAG_USABLE_WITH_DARK_BACKGROUND = 0x00000002u
75 } hb_ot_color_palette_flags_t;
76
77 HB_EXTERN hb_ot_color_palette_flags_t
78 hb_ot_color_palette_get_flags (hb_face_t *face,
79 unsigned int palette_index);
80
81 HB_EXTERN unsigned int
82 hb_ot_color_palette_get_colors (hb_face_t *face,
83 unsigned int palette_index,
84 unsigned int start_offset,
85 unsigned int *color_count, /* IN/OUT. May be NULL. */
86 hb_color_t *colors /* OUT. May be NULL. */);
87
88
89 /*
90 * Color layers.
91 */
92
93 HB_EXTERN hb_bool_t
94 hb_ot_color_has_layers (hb_face_t *face);
95
96 /**
97 * hb_ot_color_layer_t:
98 *
99 * Pairs of glyph and color index.
100 *
101 * Since: 2.1.0
102 **/
103 typedef struct hb_ot_color_layer_t
104 {
105 hb_codepoint_t glyph;
106 unsigned int color_index;
107 } hb_ot_color_layer_t;
108
109 HB_EXTERN unsigned int
110 hb_ot_color_glyph_get_layers (hb_face_t *face,
111 hb_codepoint_t glyph,
112 unsigned int start_offset,
113 unsigned int *count, /* IN/OUT. May be NULL. */
114 hb_ot_color_layer_t *layers /* OUT. May be NULL. */);
115
116 /*
117 * SVG
118 */
119
120 HB_EXTERN hb_bool_t
121 hb_ot_color_has_svg (hb_face_t *face);
122
123 HB_EXTERN hb_blob_t *
124 hb_ot_color_glyph_reference_svg (hb_face_t *face, hb_codepoint_t glyph);
125
126 /*
127 * PNG: CBDT or sbix
128 */
129
130 HB_EXTERN hb_bool_t
131 hb_ot_color_has_png (hb_face_t *face);
132
133 HB_EXTERN hb_blob_t *
134 hb_ot_color_glyph_reference_png (hb_font_t *font, hb_codepoint_t glyph);
135
136
137 HB_END_DECLS
138
139 #endif /* HB_OT_COLOR_H */