Don't run animators in buildLayer

 Bug: 17172689

Change-Id: Ib47d589c002543327fa336718440f9f8c95524e0

3 files changed, 16 insertions, 2 deletions

diff --git a/libs/hwui/RenderNode.cpp b/libs/hwui/RenderNode.cpp
index 0db6198..898b66d 100644
--- a/libs/hwui/RenderNode.cpp
+++ b/libs/hwui/RenderNode.cpp
@@ -216,7 +216,10 @@ void RenderNode::prepareTreeImpl(TreeInfo& info) {
     if (info.mode == TreeInfo::MODE_FULL) {
         pushStagingPropertiesChanges(info);
     }
-    uint32_t animatorDirtyMask = mAnimatorManager.animate(info);
+    uint32_t animatorDirtyMask = 0;
+    if (CC_LIKELY(info.runAnimations)) {
+        animatorDirtyMask = mAnimatorManager.animate(info);
+    }
     prepareLayer(info, animatorDirtyMask);
     if (info.mode == TreeInfo::MODE_FULL) {
         pushStagingDisplayListChanges(info);
@@ -231,7 +234,9 @@ void RenderNode::pushStagingPropertiesChanges(TreeInfo& info) {
     // Push the animators first so that setupStartValueIfNecessary() is called
     // before properties() is trampled by stagingProperties(), as they are
     // required by some animators.
-    mAnimatorManager.pushStaging(info);
+    if (CC_LIKELY(info.runAnimations)) {
+        mAnimatorManager.pushStaging(info);
+    }
     if (mDirtyPropertyFields) {
         mDirtyPropertyFields = 0;
         damageSelf(info);
diff --git a/libs/hwui/TreeInfo.h b/libs/hwui/TreeInfo.h
index 331f157..74d52a3 100644
--- a/libs/hwui/TreeInfo.h
+++ b/libs/hwui/TreeInfo.h
@@ -65,6 +65,7 @@ public:
         , frameTimeMs(0)
         , animationHook(NULL)
         , prepareTextures(mode == MODE_FULL)
+        , runAnimations(true)
         , damageAccumulator(NULL)
         , renderState(renderState)
         , renderer(NULL)
@@ -76,6 +77,7 @@ public:
         , frameTimeMs(clone.frameTimeMs)
         , animationHook(clone.animationHook)
         , prepareTextures(mode == MODE_FULL)
+        , runAnimations(clone.runAnimations)
         , damageAccumulator(clone.damageAccumulator)
         , renderState(clone.renderState)
         , renderer(clone.renderer)
@@ -88,6 +90,12 @@ public:
     // TODO: Remove this? Currently this is used to signal to stop preparing
     // textures if we run out of cache space.
     bool prepareTextures;
+    // TODO: buildLayer uses this to suppress running any animations, but this
+    // should probably be refactored somehow. The reason this is done is
+    // because buildLayer is not setup for injecting the animationHook, as well
+    // as this being otherwise wasted work as all the animators will be
+    // re-evaluated when the frame is actually drawn
+    bool runAnimations;
 
     // Must not be null during actual usage
     DamageAccumulator* damageAccumulator;
diff --git a/libs/hwui/renderthread/CanvasContext.cpp b/libs/hwui/renderthread/CanvasContext.cpp
index 5922135..4bf5a8a 100644
--- a/libs/hwui/renderthread/CanvasContext.cpp
+++ b/libs/hwui/renderthread/CanvasContext.cpp
@@ -257,6 +257,7 @@ void CanvasContext::buildLayer(RenderNode* node) {
     info.frameTimeMs = mRenderThread.timeLord().frameTimeMs();
     info.damageAccumulator = &mDamageAccumulator;
     info.renderer = mCanvas;
+    info.runAnimations = false;
     node->prepareTree(info);
     SkRect ignore;
     mDamageAccumulator.finish(&ignore);