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 #ifndef MINIKIN_INTERNAL_H 20 #define MINIKIN_INTERNAL_H 21 22 #include <hb.h> 23 24 #include <utils/Mutex.h> 25 26 #include <minikin/MinikinFont.h> 27 28 namespace android { 29 30 // All external Minikin interfaces are designed to be thread-safe. 31 // Presently, that's implemented by through a global lock, and having 32 // all external interfaces take that lock. 33 34 extern Mutex gMinikinLock; 35 36 // Aborts if gMinikinLock is not acquired. Do nothing on the release build. 37 void assertMinikinLocked(); 38 39 // Returns true if c is emoji. 40 bool isEmoji(uint32_t c); 41 42 // Returns true if c is emoji modifier base. 43 bool isEmojiBase(uint32_t c); 44 45 // Returns true if c is emoji modifier. 46 bool isEmojiModifier(uint32_t c); 47 48 hb_blob_t* getFontTable(MinikinFont* minikinFont, uint32_t tag); 49 50 // An RAII wrapper for hb_blob_t 51 class HbBlob { 52 public: 53 // Takes ownership of hb_blob_t object, caller is no longer 54 // responsible for calling hb_blob_destroy(). 55 HbBlob(hb_blob_t* blob) : mBlob(blob) { 56 } 57 58 ~HbBlob() { 59 hb_blob_destroy(mBlob); 60 } 61 62 const uint8_t* get() const { 63 const char* data = hb_blob_get_data(mBlob, nullptr); 64 return reinterpret_cast<const uint8_t*>(data); 65 } 66 67 size_t size() const { 68 unsigned int length = 0; 69 hb_blob_get_data(mBlob, &length); 70 return (size_t)length; 71 } 72 73 private: 74 hb_blob_t* mBlob; 75 }; 76 77 } 78 79 #endif // MINIKIN_INTERNAL_H 80
