summaryrefslogtreecommitdiff
path: root/Build/source/libs/harfbuzz/harfbuzz-src/src/hb-ot-color.cc
blob: ceebe0b7a0203f19369d1c1e9527d91503f2338c (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
/*
 * Copyright © 2016  Google, Inc.
 * Copyright © 2018  Ebrahim Byagowi
 *
 *  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): Sascha Brawer
 */

#include "hb-open-type-private.hh"
#include "hb-ot-color-colr-table.hh"
#include "hb-ot-color-cpal-table.hh"
#include "hb-ot.h"

#include <stdlib.h>
#include <string.h>

#include "hb-ot-layout-private.hh"
#include "hb-shaper-private.hh"

#if 0
HB_MARK_AS_FLAG_T (hb_ot_color_palette_flags_t)
//HB_SHAPER_DATA_ENSURE_DECLARE(ot, face) Hmm?


static inline const OT::COLR&
_get_colr (hb_face_t *face)
{
  if (unlikely (!hb_ot_shaper_face_data_ensure (face))) return OT::Null(OT::COLR);
  hb_ot_layout_t * layout = hb_ot_layout_from_face (face);
  return *(layout->colr.get ());
}

static inline const OT::CPAL&
_get_cpal (hb_face_t *face)
{
  if (unlikely (!hb_ot_shaper_face_data_ensure (face))) return OT::Null(OT::CPAL);
  hb_ot_layout_t * layout = hb_ot_layout_from_face (face);
  return *(layout->cpal.get ());
}


/**
 * hb_ot_color_get_palette_count:
 * @face: a font face.
 *
 * Returns: the number of color palettes in @face, or zero if @face has
 * no colors.
 *
 * Since: REPLACEME
 */
unsigned int
hb_ot_color_get_palette_count (hb_face_t *face)
{
  const OT::CPAL& cpal = _get_cpal (face);
  return cpal.get_palette_count ();
}


/**
 * hb_ot_color_get_palette_name_id:
 * @face: a font face.
 * @palette: the index of the color palette whose name is being requested.
 *
 * Retrieves the name id of a color palette. For example, a color font can
 * have themed palettes like "Spring", "Summer", "Fall", and "Winter".
 *
 * Returns: an identifier within @face's `name` table.
 * If the requested palette has no name, or if @face has no colors,
 * or if @palette is not between 0 and hb_ot_color_get_palette_count(),
 * the result is 0xFFFF. The implementation does not check whether
 * the returned palette name id is actually in @face's `name` table.
 *
 * Since: REPLACEME
 */
unsigned int
hb_ot_color_get_palette_name_id (hb_face_t *face, unsigned int palette)
{
  const OT::CPAL& cpal = _get_cpal (face);
  return cpal.get_palette_name_id (palette);
}


/**
 * hb_ot_color_get_palette_flags:
 * @face: a font face
 * @palette: the index of the color palette whose flags are being requested
 *
 * Returns: the flags for the requested color palette.  If @face has no colors,
 * or if @palette is not between 0 and hb_ot_color_get_palette_count(),
 * the result is #HB_OT_COLOR_PALETTE_FLAG_DEFAULT.
 *
 * Since: REPLACEME
 */
hb_ot_color_palette_flags_t
hb_ot_color_get_palette_flags (hb_face_t *face, unsigned int palette)
{
  const OT::CPAL& cpal = _get_cpal(face);
  return cpal.get_palette_flags (palette);
}


/**
 * hb_ot_color_get_palette_colors:
 * @face:         a font face.
 * @palette:      the index of the color palette whose colors
 *                are being requested.
 * @start_offset: the index of the first color being requested.
 * @color_count:  (inout) (optional): on input, how many colors
 *                can be maximally stored into the @colors array;
 *                on output, how many colors were actually stored.
 * @colors: (array length=color_count) (optional):
 *                an array of #hb_ot_color_t records. After calling
 *                this function, @colors will be filled with
 *                the palette colors. If @colors is NULL, the function
 *                will just return the number of total colors
 *                without storing any actual colors; this can be used
 *                for allocating a buffer of suitable size before calling
 *                hb_ot_color_get_palette_colors() a second time.
 *
 * Retrieves the colors in a color palette.
 *
 * Returns: the total number of colors in the palette. All palettes in
 * a font have the same number of colors. If @face has no colors, or if
 * @palette is not between 0 and hb_ot_color_get_palette_count(),
 * the result is zero.
 *
 * Since: REPLACEME
 */
unsigned int
hb_ot_color_get_palette_colors (hb_face_t       *face,
				unsigned int     palette, /* default=0 */
				unsigned int     start_offset,
				unsigned int    *color_count /* IN/OUT */,
				hb_ot_color_t   *colors /* OUT */)
{
  const OT::CPAL& cpal = _get_cpal(face);
  if (unlikely (palette >= cpal.numPalettes))
  {
    if (color_count) *color_count = 0;
    return 0;
  }

  const OT::ColorRecord* crec = &cpal.offsetFirstColorRecord (&cpal);
  crec += cpal.colorRecordIndices[palette];

  unsigned int num_results = 0;
  if (likely (color_count && colors))
  {
    for (unsigned int i = start_offset;
	 i < cpal.numPaletteEntries && num_results < *color_count; ++i)
    {
      hb_ot_color_t* result = &colors[num_results];
      result->red = crec[i].red;
      result->green = crec[i].green;
      result->blue = crec[i].blue;
      result->alpha = crec[i].alpha;
      ++num_results;
    }
  }

  if (likely (color_count)) *color_count = num_results;
  return cpal.numPaletteEntries;
}
#endif