LayoutUtils.h revision 4e3adc6fb2073d5b466b88b8f5329d281038aba1
1/*
2 * Copyright (C) 2015 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#ifndef MINIKIN_LAYOUT_UTILS_H
18#define MINIKIN_LAYOUT_UTILS_H
19
20#include <stdint.h>
21
22/**
23 * Return offset of previous word break. It is either < offset or == 0.
24 *
25 * For the purpose of layout, a word break is a boundary with no
26 * kerning or complex script processing. This is necessarily a
27 * heuristic, but should be accurate most of the time.
28 */
29size_t getPrevWordBreakForCache(
30        const uint16_t* chars, size_t offset, size_t len);
31
32/**
33 * Return offset of next word break. It is either > offset or == len.
34 *
35 * For the purpose of layout, a word break is a boundary with no
36 * kerning or complex script processing. This is necessarily a
37 * heuristic, but should be accurate most of the time.
38 */
39size_t getNextWordBreakForCache(
40        const uint16_t* chars, size_t offset, size_t len);
41
42#endif  // MINIKIN_LAYOUT_UTILS_H
43