BufferQueue 详解

一张图把整个 BufferQueue 从上到下点清楚

flowchart LR
	hwui <--> a[OpenGL/EGL]
	游戏引擎 <--> a
	a <--> Surface --> b
	subgraph BLASTBufferQueue
	BBQBufferQueueProducer --> b
	BLASTBufferItemConsumer --> bic[BufferItemConsumer] --> c
	bic --> ConsumerBase 
	subgraph BufferQueue
	b[BufferQueueProducer] <--> BufferQueueCore <--> c[BufferQueueConsumer]
	subgraph BufferQueueCore
	biv[Vector<BufferItem> mQueue]
	slt[mSlots]
	slt --> mFreeSlots
	slt --> mFreeBuffers
	slt --> mAcquireBuffers
	slt --> mUnusedSlots
	end
	end
	end
	BufferQueueCore --> Gralloc --> ION
	BufferQueue -- Buffer --> t[SurfaceComposerClient::Transaction] --> s[SurfaceFlinger]
	SurfaceComposerClient --> Client --> s
	SurfaceControl --> t