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/*
* Copyright (C) 2017 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.
*/
/**
* @addtogroup AHardwareBuffer
* @{
*/
/**
* @file hardware_buffer_jni.h
* @brief JNI glue for native hardware buffers.
*/
#ifndef ANDROID_HARDWARE_BUFFER_JNI_H
#define ANDROID_HARDWARE_BUFFER_JNI_H
#include <sys/cdefs.h>
#include <android/hardware_buffer.h>
#include <jni.h>
__BEGIN_DECLS
/**
* Return the AHardwareBuffer wrapped by a Java HardwareBuffer object.
*
* This method does not acquire any additional reference to the AHardwareBuffer
* that is returned. To keep the AHardwareBuffer alive after the Java
* HardwareBuffer object is closed, explicitly or by the garbage collector, be
* sure to use AHardwareBuffer_acquire() to acquire an additional reference.
*
* Available since API level 26.
*/
AHardwareBuffer* AHardwareBuffer_fromHardwareBuffer(JNIEnv* env,
jobject hardwareBufferObj) __INTRODUCED_IN(26);
/**
* Return a new Java HardwareBuffer object that wraps the passed native
* AHardwareBuffer object. The Java HardwareBuffer will acquire a reference to
* the internal buffer and manage its lifetime. For example:
*
* <pre><code>
* AHardwareBuffer* buffer;
* AHardwareBuffer_allocate(..., &buffer); // `buffer` has reference count 1
* jobject java_result = AHardwareBuffer_toHardwareBuffer(buffer); // `buffer` has reference count 2.
* AHardwareBuffer_release(buffer); // `buffer` has reference count 1
* return result; // The underlying buffer is kept alive by `java_result` and
* // will be set to 0 when it is closed on the Java side with
* // HardwareBuffer::close().
* </code></pre>
*
* Available since API level 26.
*/
jobject AHardwareBuffer_toHardwareBuffer(JNIEnv* env,
AHardwareBuffer* hardwareBuffer) __INTRODUCED_IN(26);
__END_DECLS
#endif // ANDROID_HARDWARE_BUFFER_JNI_H
/** @} */
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