76 lines
2.4 KiB
C
76 lines
2.4 KiB
C
/*
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* Copyright (C) 2017 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/**
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* @addtogroup AHardwareBuffer
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* @{
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*/
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/**
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* @file hardware_buffer_jni.h
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* @brief JNI glue for native hardware buffers.
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*/
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#ifndef ANDROID_HARDWARE_BUFFER_JNI_H
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#define ANDROID_HARDWARE_BUFFER_JNI_H
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#include <sys/cdefs.h>
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#include <android/hardware_buffer.h>
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#include <jni.h>
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__BEGIN_DECLS
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/**
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* Return the AHardwareBuffer wrapped by a Java HardwareBuffer object.
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*
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* This method does not acquire any additional reference to the AHardwareBuffer
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* that is returned. To keep the AHardwareBuffer alive after the Java
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* HardwareBuffer object is closed, explicitly or by the garbage collector, be
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* sure to use AHardwareBuffer_acquire() to acquire an additional reference.
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*
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* Available since API level 26.
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*/
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AHardwareBuffer* AHardwareBuffer_fromHardwareBuffer(JNIEnv* env,
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jobject hardwareBufferObj) __INTRODUCED_IN(26);
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/**
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* Return a new Java HardwareBuffer object that wraps the passed native
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* AHardwareBuffer object. The Java HardwareBuffer will acquire a reference to
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* the internal buffer and manage its lifetime. For example:
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*
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* <pre><code>
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* AHardwareBuffer* buffer;
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* AHardwareBuffer_allocate(..., &buffer); // `buffer` has reference count 1
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* jobject java_result = AHardwareBuffer_toHardwareBuffer(buffer); // `buffer` has reference count 2.
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* AHardwareBuffer_release(buffer); // `buffer` has reference count 1
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* return result; // The underlying buffer is kept alive by `java_result` and
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* // will be set to 0 when it is closed on the Java side with
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* // HardwareBuffer::close().
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* </code></pre>
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*
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* Available since API level 26.
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*/
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jobject AHardwareBuffer_toHardwareBuffer(JNIEnv* env,
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AHardwareBuffer* hardwareBuffer) __INTRODUCED_IN(26);
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__END_DECLS
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#endif // ANDROID_HARDWARE_BUFFER_JNI_H
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/** @} */
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