surfaceflinger: cache HWC client targets and buffers
Remember HWC client targets and buffers, and make sure we send each
unique slot/handle pair only once. This allows the composer to
clone/register/retain each buffer only once.
Test: builds and boots
Change-Id: Ib485189043a9c132031e82d4d7380ace3bf9453d
diff --git a/include/gui/GLConsumer.h b/include/gui/GLConsumer.h
index f8ded74..4a49f53 100644
--- a/include/gui/GLConsumer.h
+++ b/include/gui/GLConsumer.h
@@ -172,7 +172,9 @@
void setFilteringEnabled(bool enabled);
// getCurrentBuffer returns the buffer associated with the current image.
- sp<GraphicBuffer> getCurrentBuffer() const;
+ // When outSlot is not nullptr, the current buffer slot index is also
+ // returned.
+ sp<GraphicBuffer> getCurrentBuffer(int* outSlot = nullptr) const;
// getCurrentTextureTarget returns the texture target of the current
// texture as returned by updateTexImage().