cbb288bfe8
Rewrote SurfaceFlinger's buffer management from the ground-up. The design now support an arbitrary number of buffers per surface, however the current implementation is limited to four. Currently only 2 buffers are used in practice. The main new feature is to be able to dequeue all buffers at once (very important when there are only two). A client can dequeue all buffers until there are none available, it can lock all buffers except the last one that is used for composition. The client will block then, until a new buffer is enqueued. The current implementation requires that buffers are locked in the same order they are dequeued and enqueued in the same order they are locked. Only one buffer can be locked at a time. eg. Allowed sequence: DQ, DQ, LOCK, Q, LOCK, Q eg. Forbidden sequence: DQ, DQ, LOCK, LOCK, Q, Q
82 lines
2.2 KiB
C++
82 lines
2.2 KiB
C++
/*
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* Copyright (C) 2007 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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#ifndef ANDROID_UI_PRIVATE_SURFACE_BUFFER_H
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#define ANDROID_UI_PRIVATE_SURFACE_BUFFER_H
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#include <stdint.h>
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#include <sys/types.h>
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#include <utils/RefBase.h>
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#include <private/ui/android_natives_priv.h>
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namespace android {
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// ---------------------------------------------------------------------------
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class BufferMapper;
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class Parcel;
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class Rect;
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class Surface;
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class SurfaceBuffer;
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// ---------------------------------------------------------------------------
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class SurfaceBuffer
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: public EGLNativeBase<
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android_native_buffer_t,
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SurfaceBuffer,
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LightRefBase<SurfaceBuffer> >
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{
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public:
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status_t lock(uint32_t usage, void** vaddr);
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status_t lock(uint32_t usage, const Rect& rect, void** vaddr);
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status_t unlock();
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void setIndex(int index);
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int getIndex() const;
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protected:
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SurfaceBuffer();
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SurfaceBuffer(const Parcel& reply);
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virtual ~SurfaceBuffer();
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bool mOwner;
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inline const BufferMapper& getBufferMapper() const { return mBufferMapper; }
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inline BufferMapper& getBufferMapper() { return mBufferMapper; }
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private:
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friend class Surface;
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friend class BpSurface;
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friend class BnSurface;
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friend class LightRefBase<SurfaceBuffer>;
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SurfaceBuffer& operator = (const SurfaceBuffer& rhs);
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const SurfaceBuffer& operator = (const SurfaceBuffer& rhs) const;
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static status_t writeToParcel(Parcel* reply,
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android_native_buffer_t const* buffer);
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BufferMapper& mBufferMapper;
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int mIndex;
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};
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}; // namespace android
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#endif // ANDROID_UI_PRIVATE_SURFACE_BUFFER_H
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