MinikinInternal.cpp revision aaa4e3470270496e6eb80704eadecb2cb7c56bf0 
1/*
2 * Copyright (C) 2014 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17// Definitions internal to Minikin
18
19#include "MinikinInternal.h"
20#include "HbFontCache.h"
21
22#include <cutils/log.h>
23
24namespace android {
25
26Mutex gMinikinLock;
27
28void assertMinikinLocked() {
29#ifdef ENABLE_RACE_DETECTION
30    LOG_ALWAYS_FATAL_IF(gMinikinLock.tryLock() == 0);
31#endif
32}
33
34// Based on Modifiers from http://www.unicode.org/L2/L2016/16011-data-file.txt
35bool isEmojiModifier(uint32_t c) {
36    return (0x1F3FB <= c && c <= 0x1F3FF);
37}
38
39// Based on Emoji_Modifier_Base from
40// http://www.unicode.org/Public/emoji/3.0/emoji-data.txt
41bool isEmojiBase(uint32_t c) {
42    if (0x261D <= c && c <= 0x270D) {
43        return (c == 0x261D || c == 0x26F9 || (0x270A <= c && c <= 0x270D));
44    } else if (0x1F385 <= c && c <= 0x1F93E) {
45        return (c == 0x1F385
46                || (0x1F3C3 <= c && c <= 0x1F3C4)
47                || (0x1F3CA <= c && c <= 0x1F3CB)
48                || (0x1F442 <= c && c <= 0x1F443)
49                || (0x1F446 <= c && c <= 0x1F450)
50                || (0x1F466 <= c && c <= 0x1F469)
51                || c == 0x1F46E
52                || (0x1F470 <= c && c <= 0x1F478)
53                || c == 0x1F47C
54                || (0x1F481 <= c && c <= 0x1F483)
55                || (0x1F485 <= c && c <= 0x1F487)
56                || c == 0x1F4AA
57                || c == 0x1F575
58                || c == 0x1F57A
59                || c == 0x1F590
60                || (0x1F595 <= c && c <= 0x1F596)
61                || (0x1F645 <= c && c <= 0x1F647)
62                || (0x1F64B <= c && c <= 0x1F64F)
63                || c == 0x1F6A3
64                || (0x1F6B4 <= c && c <= 0x1F6B6)
65                || c == 0x1F6C0
66                || (0x1F918 <= c && c <= 0x1F91E)
67                || c == 0x1F926
68                || c == 0x1F930
69                || (0x1F933 <= c && c <= 0x1F939)
70                || (0x1F93B <= c && c <= 0x1F93E));
71    } else {
72        return false;
73    }
74}
75
76hb_blob_t* getFontTable(MinikinFont* minikinFont, uint32_t tag) {
77    assertMinikinLocked();
78    hb_font_t* font = getHbFontLocked(minikinFont);
79    hb_face_t* face = hb_font_get_face(font);
80    hb_blob_t* blob = hb_face_reference_table(face, tag);
81    hb_font_destroy(font);
82    return blob;
83}
84
85}
86