Fix various flickering / artifacts
these were due to the "preserve backbuffer" optimization
interfering with hw composer. basically the screen needed
to be redrawn in the areas that move from GL to
overlay.
Bug: 5245513
Change-Id: I9bf75c4fe905f3ef62005e52108b94edae692304
diff --git a/services/surfaceflinger/SurfaceFlinger.cpp b/services/surfaceflinger/SurfaceFlinger.cpp
index 598220f..b4c5dec 100644
--- a/services/surfaceflinger/SurfaceFlinger.cpp
+++ b/services/surfaceflinger/SurfaceFlinger.cpp
@@ -817,6 +817,20 @@
mHwWorkListDirty = false;
HWComposer& hwc(graphicPlane(0).displayHardware().getHwComposer());
if (hwc.initCheck() == NO_ERROR) {
+
+ const DisplayHardware& hw(graphicPlane(0).displayHardware());
+ uint32_t flags = hw.getFlags();
+ if ((flags & DisplayHardware::SWAP_RECTANGLE) ||
+ (flags & DisplayHardware::BUFFER_PRESERVED))
+ {
+ // we need to redraw everything (the whole screen)
+ // NOTE: we could be more subtle here and redraw only
+ // the area which will end-up in an overlay. But since this
+ // shouldn't happen often, we invalidate everything.
+ mDirtyRegion.set(hw.bounds());
+ mInvalidRegion = mDirtyRegion;
+ }
+
const Vector< sp<LayerBase> >& currentLayers(mVisibleLayersSortedByZ);
const size_t count = currentLayers.size();
hwc.createWorkList(count);