commit ee44edd0acccbf5eaa918d75737c3b65ee04fff7
author Dan Stoza <stoza@google.com> Mon Mar 23 15:50:23 2015 -0700
committer Dan Stoza <stoza@google.com> Wed Apr 15 13:20:01 2015 -0700
tree 757e79db1df532e85418fe69af5d6e49732e6869
parent 5065a55291b67f584d7b0be3fa3cfc4e29a3cd1c

SurfaceFlinger: Pass surface damage to HWC

Passes the surface damage from the incoming SurfaceFlingerConsumer
BufferQueue down to the hardware composer HAL interface, if the
HWC version number is 1.5 or greater.

Bug: 11239309
Change-Id: Ic4305210593874a8d6deba3319055b2b8c57e926

services/surfaceflinger/Layer.cpp

diff --git a/services/surfaceflinger/Layer.cpp b/services/surfaceflinger/Layer.cpp
index 2ac4765..7bb7529 100644
--- a/services/surfaceflinger/Layer.cpp
+++ b/services/surfaceflinger/Layer.cpp
@@ -513,6 +513,16 @@
     Region visible = tr.transform(visibleRegion.intersect(hw->getViewport()));
     layer.setVisibleRegionScreen(visible);
 
+    // Pass full-surface damage down untouched
+    if (surfaceDamageRegion.isRect() &&
+            surfaceDamageRegion.getBounds() == Rect::INVALID_RECT) {
+        layer.setSurfaceDamage(surfaceDamageRegion);
+    } else {
+        Region surfaceDamage =
+            tr.transform(surfaceDamageRegion.intersect(hw->getViewport()));
+        layer.setSurfaceDamage(surfaceDamage);
+    }
+
     if (mSidebandStream.get()) {
         layer.setSidebandStream(mSidebandStream);
     } else {
@@ -1034,6 +1044,18 @@
     return true;
 }
 
+void Layer::useSurfaceDamage() {
+    if (mFlinger->mForceFullDamage) {
+        surfaceDamageRegion = Region::INVALID_REGION;
+    } else {
+        surfaceDamageRegion = mSurfaceFlingerConsumer->getSurfaceDamage();
+    }
+}
+
+void Layer::useEmptyDamage() {
+    surfaceDamageRegion.clear();
+}
+
 // ----------------------------------------------------------------------------
 // pageflip handling...
 // ----------------------------------------------------------------------------
@@ -1349,6 +1371,7 @@
 
     s.activeTransparentRegion.dump(result, "transparentRegion");
     visibleRegion.dump(result, "visibleRegion");
+    surfaceDamageRegion.dump(result, "surfaceDamageRegion");
     sp<Client> client(mClientRef.promote());
 
     result.appendFormat(            "      "