separate transactions from updates
with this changes, SF transactions are handled as soon as possible
but do not trigger updates. the update is delayed until the next
vsync.
this allows us to work much better without requiring triple-buffering.
Change-Id: I1fa10794d0cf742129f0877698b7b1e1f2ec7401
diff --git a/services/surfaceflinger/LayerBase.h b/services/surfaceflinger/LayerBase.h
index 6b62c9d..b8f7680 100644
--- a/services/surfaceflinger/LayerBase.h
+++ b/services/surfaceflinger/LayerBase.h
@@ -103,8 +103,6 @@
Rect visibleBounds() const;
void drawRegion(const Region& reg) const;
- void invalidate();
-
virtual sp<LayerBaseClient> getLayerBaseClient() const { return 0; }
virtual sp<Layer> getLayer() const { return 0; }
@@ -204,9 +202,16 @@
/** called with the state lock when the surface is removed from the
* current list */
- virtual void onRemoved() { };
+ virtual void onRemoved() { }
- virtual void onLayerDisplayed() { };
+ /** called after page-flip
+ */
+ virtual void onLayerDisplayed() { }
+
+ /** called before composition.
+ * returns true if the layer has pending updates.
+ */
+ virtual bool onPreComposition() { return false; }
/** always call base class first */
virtual void dump(String8& result, char* scratch, size_t size) const;
@@ -275,10 +280,6 @@
mutable bool mDebug;
- // atomic
- volatile int32_t mInvalidate;
-
-
public:
// called from class SurfaceFlinger
virtual ~LayerBase();