Push HWC cache slot generation down into CompositionEngine
Stop caching buffers inside SurfaceFlinger and remove the tight coupling
between SurfaceFlinger's ClientCache and the Hardware Composer cache.
This allows a better seperation of responsibility, where buffer cache
management is not split between HwcSlotGenerator and HwcBufferCache, but
is instead solely handled by HwcBufferCache.
Note that FramebufferSurface and VirtualDisplaySurface no longer use
HwcBufferCache, but instead use their own cache slot management that
is solely based on BufferQueue slot numbers.
Also do minor refactoring in FramebufferSurface to simplify code.
Bug: 258196272
Test: started and stopped multiple YouTube videos on adt4 and verified
no change in graphic buffer usage
Test: atest HwcBufferCacheTest
Test: atest OutputPrepareTest
Change-Id: Ica7955ab4bc70e3c70207390e36dff73a2fc4949
diff --git a/services/surfaceflinger/SurfaceFlinger.h b/services/surfaceflinger/SurfaceFlinger.h
index b9903a7..e7ecf6c 100644
--- a/services/surfaceflinger/SurfaceFlinger.h
+++ b/services/surfaceflinger/SurfaceFlinger.h
@@ -96,6 +96,7 @@
#include <unordered_map>
#include <unordered_set>
#include <utility>
+#include <vector>
#include <aidl/android/hardware/graphics/common/DisplayDecorationSupport.h>
#include "Client.h"
@@ -1091,6 +1092,10 @@
std::atomic<uint32_t> mUniqueTransactionId = 1;
SortedVector<sp<Layer>> mLayersPendingRemoval;
+ // Buffers that have been discarded by clients and need to be evicted from per-layer caches so
+ // the graphics memory can be immediately freed.
+ std::vector<uint64_t> mBufferIdsToUncache;
+
// global color transform states
Daltonizer mDaltonizer;
float mGlobalSaturationFactor = 1.0f;