Fix an issue is SF that caused drawing artifacts when hwc changed mode

we were not redrawing and/or clearing the FB properly when
hwc moved a layer from/to FB to/from OVERLAY.

In these cases we needed to expand the dirty region to include
the layer that changed mode.

Also split composeSurfaces() which was becoming quite large.

Change-Id: Id6fa1acfc4ff694037fddf7efd037a4405732073

1 files changed, 8 insertions, 0 deletions

diff --git a/services/surfaceflinger/LayerBase.cpp b/services/surfaceflinger/LayerBase.cpp
index 603fb607bae1..dfc531e2f15f 100644
--- a/services/surfaceflinger/LayerBase.cpp
+++ b/services/surfaceflinger/LayerBase.cpp
@@ -344,6 +344,14 @@ void LayerBase::setPerFrameData(hwc_layer_t* hwcl) {
     hwcl->handle = NULL;
 }
 
+void LayerBase::setOverlay(bool inOverlay) {
+    mInOverlay = inOverlay;
+}
+
+bool LayerBase::isOverlay() const {
+    return mInOverlay;
+}
+
 void LayerBase::setFiltering(bool filtering)
 {
     mFiltering = filtering;