74 lines
2.2 KiB
C
74 lines
2.2 KiB
C
/*
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* Copyright (C) 2015 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 Choreographer
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* @{
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*/
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/**
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* @file choreographer.h
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*/
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#ifndef ANDROID_CHOREOGRAPHER_H
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#define ANDROID_CHOREOGRAPHER_H
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#include <sys/cdefs.h>
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__BEGIN_DECLS
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#if __ANDROID_API__ >= 24
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struct AChoreographer;
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typedef struct AChoreographer AChoreographer;
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/**
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* Prototype of the function that is called when a new frame is being rendered.
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* It's passed the time that the frame is being rendered as nanoseconds in the
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* CLOCK_MONOTONIC time base, as well as the data pointer provided by the
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* application that registered a callback. All callbacks that run as part of
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* rendering a frame will observe the same frame time, so it should be used
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* whenever events need to be synchronized (e.g. animations).
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*/
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typedef void (*AChoreographer_frameCallback)(long frameTimeNanos, void* data);
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/**
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* Get the AChoreographer instance for the current thread. This must be called
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* on an ALooper thread.
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*/
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AChoreographer* AChoreographer_getInstance();
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/**
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* Post a callback to be run on the next frame. The data pointer provided will
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* be passed to the callback function when it's called.
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*/
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void AChoreographer_postFrameCallback(AChoreographer* choreographer,
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AChoreographer_frameCallback callback, void* data);
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/**
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* Post a callback to be run on the frame following the specified delay. The
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* data pointer provided will be passed to the callback function when it's
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* called.
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*/
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void AChoreographer_postFrameCallbackDelayed(AChoreographer* choreographer,
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AChoreographer_frameCallback callback, void* data, long delayMillis);
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#endif /* __ANDROID_API__ >= 24 */
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__END_DECLS
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#endif // ANDROID_CHOREOGRAPHER_H
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/** @} */
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