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/*
* Copyright (C) 2014 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
// Definitions internal to Minikin
#ifndef MINIKIN_INTERNAL_H
#define MINIKIN_INTERNAL_H
#include <hb.h>
#include <utils/Mutex.h>
#include <minikin/MinikinFont.h>
namespace android {
// All external Minikin interfaces are designed to be thread-safe.
// Presently, that's implemented by through a global lock, and having
// all external interfaces take that lock.
extern Mutex gMinikinLock;
// Aborts if gMinikinLock is not acquired. Do nothing on the release build.
void assertMinikinLocked();
// Returns true if c is emoji.
bool isEmoji(uint32_t c);
// Returns true if c is emoji modifier base.
bool isEmojiBase(uint32_t c);
// Returns true if c is emoji modifier.
bool isEmojiModifier(uint32_t c);
hb_blob_t* getFontTable(MinikinFont* minikinFont, uint32_t tag);
// An RAII wrapper for hb_blob_t
class HbBlob {
public:
// Takes ownership of hb_blob_t object, caller is no longer
// responsible for calling hb_blob_destroy().
HbBlob(hb_blob_t* blob) : mBlob(blob) {
}
~HbBlob() {
hb_blob_destroy(mBlob);
}
const uint8_t* get() const {
const char* data = hb_blob_get_data(mBlob, nullptr);
return reinterpret_cast<const uint8_t*>(data);
}
size_t size() const {
unsigned int length = 0;
hb_blob_get_data(mBlob, &length);
return (size_t)length;
}
private:
hb_blob_t* mBlob;
};
}
#endif // MINIKIN_INTERNAL_H
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