1 /*
2 * Copyright (C) 2018 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_HB_UTILS_H
18 #define MINIKIN_HB_UTILS_H
19
20 #include <hb.h>
21 #include <cmath>
22 #include <memory>
23
24 namespace minikin {
25
HBFixedToFloat(hb_position_t v)26 inline float HBFixedToFloat(hb_position_t v) {
27 return scalbnf(v, -8);
28 }
29
HBFloatToFixed(float v)30 inline hb_position_t HBFloatToFixed(float v) {
31 return scalbnf(v, +8);
32 }
33
34 struct HbBlobDeleter {
operatorHbBlobDeleter35 void operator()(hb_blob_t* v) { hb_blob_destroy(v); }
36 };
37
38 struct HbFaceDeleter {
operatorHbFaceDeleter39 void operator()(hb_face_t* v) { hb_face_destroy(v); }
40 };
41
42 struct HbFontDeleter {
operatorHbFontDeleter43 void operator()(hb_font_t* v) { hb_font_destroy(v); }
44 };
45
46 struct HbBufferDeleter {
operatorHbBufferDeleter47 void operator()(hb_buffer_t* v) { hb_buffer_destroy(v); }
48 };
49
50 using HbBlobUniquePtr = std::unique_ptr<hb_blob_t, HbBlobDeleter>;
51 using HbFaceUniquePtr = std::unique_ptr<hb_face_t, HbFaceDeleter>;
52 using HbFontUniquePtr = std::unique_ptr<hb_font_t, HbFontDeleter>;
53 using HbBufferUniquePtr = std::unique_ptr<hb_buffer_t, HbBufferDeleter>;
54
55 } // namespace minikin
56
57 #endif // MINIKIN_HB_UTILS_H
58