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 #include "generated/UnicodeData.h"
22 
23 #include <cutils/log.h>
24 
25 namespace android {
26 
27 Mutex gMinikinLock;
28 
assertMinikinLocked()29 void assertMinikinLocked() {
30 #ifdef ENABLE_RACE_DETECTION
31     LOG_ALWAYS_FATAL_IF(gMinikinLock.tryLock() == 0);
32 #endif
33 }
34 
isEmoji(uint32_t c)35 bool isEmoji(uint32_t c) {
36     const size_t length = sizeof(generated::EMOJI_LIST) / sizeof(generated::EMOJI_LIST[0]);
37     return std::binary_search(generated::EMOJI_LIST, generated::EMOJI_LIST + length, c);
38 }
39 
40 // Based on Modifiers from http://www.unicode.org/L2/L2016/16011-data-file.txt
isEmojiModifier(uint32_t c)41 bool isEmojiModifier(uint32_t c) {
42     return (0x1F3FB <= c && c <= 0x1F3FF);
43 }
44 
45 // Based on Emoji_Modifier_Base from
46 // http://www.unicode.org/Public/emoji/3.0/emoji-data.txt
isEmojiBase(uint32_t c)47 bool isEmojiBase(uint32_t c) {
48     if (0x261D <= c && c <= 0x270D) {
49         return (c == 0x261D || c == 0x26F9 || (0x270A <= c && c <= 0x270D));
50     } else if (0x1F385 <= c && c <= 0x1F93E) {
51         return (c == 0x1F385
52                 || (0x1F3C3 <= c && c <= 0x1F3C4)
53                 || (0x1F3CA <= c && c <= 0x1F3CB)
54                 || (0x1F442 <= c && c <= 0x1F443)
55                 || (0x1F446 <= c && c <= 0x1F450)
56                 || (0x1F466 <= c && c <= 0x1F469)
57                 || c == 0x1F46E
58                 || (0x1F470 <= c && c <= 0x1F478)
59                 || c == 0x1F47C
60                 || (0x1F481 <= c && c <= 0x1F483)
61                 || (0x1F485 <= c && c <= 0x1F487)
62                 || c == 0x1F4AA
63                 || c == 0x1F575
64                 || c == 0x1F57A
65                 || c == 0x1F590
66                 || (0x1F595 <= c && c <= 0x1F596)
67                 || (0x1F645 <= c && c <= 0x1F647)
68                 || (0x1F64B <= c && c <= 0x1F64F)
69                 || c == 0x1F6A3
70                 || (0x1F6B4 <= c && c <= 0x1F6B6)
71                 || c == 0x1F6C0
72                 || (0x1F918 <= c && c <= 0x1F91E)
73                 || c == 0x1F926
74                 || c == 0x1F930
75                 || (0x1F933 <= c && c <= 0x1F939)
76                 || (0x1F93B <= c && c <= 0x1F93E));
77     } else {
78         return false;
79     }
80 }
81 
getFontTable(MinikinFont * minikinFont,uint32_t tag)82 hb_blob_t* getFontTable(MinikinFont* minikinFont, uint32_t tag) {
83     assertMinikinLocked();
84     hb_font_t* font = getHbFontLocked(minikinFont);
85     hb_face_t* face = hb_font_get_face(font);
86     hb_blob_t* blob = hb_face_reference_table(face, tag);
87     hb_font_destroy(font);
88     return blob;
89 }
90 
91 }
92