Make setter methods on Outline call setEmpty() based on params

bug:16142564

Additionally, better define behavior around null outline providers:

A view with an empty outline, and setClipToOutline=true will not be
rendered, though one with a null outline provider
(and thus no outline) will be.

Change-Id: Ic9549841b107b2eb51b417c66058a0cd69dd89eb

2 files changed, 25 insertions, 12 deletions

diff --git a/libs/hwui/Outline.h b/libs/hwui/Outline.h
index 024bdfd..83426e8 100644
--- a/libs/hwui/Outline.h
+++ b/libs/hwui/Outline.h
@@ -49,15 +49,20 @@ public:
         mBounds.set(outline->getBounds());
     }
 
-    bool isEmpty() const {
-        return mType == kOutlineType_None;
+    void setEmpty() {
+        mType = kOutlineType_Empty;
+        mPath.reset();
     }
 
-    void setEmpty() {
+    void setNone() {
         mType = kOutlineType_None;
         mPath.reset();
     }
 
+    bool isEmpty() const {
+        return mType == kOutlineType_Empty;
+    }
+
     void setShouldClip(bool clip) {
         mShouldClip = clip;
     }
@@ -81,7 +86,7 @@ public:
     }
 
     const SkPath* getPath() const {
-        if (mType == kOutlineType_None) return NULL;
+        if (mType == kOutlineType_None || mType == kOutlineType_Empty) return NULL;
 
         return &mPath;
     }
@@ -89,8 +94,9 @@ public:
 private:
     enum OutlineType {
         kOutlineType_None = 0,
-        kOutlineType_ConvexPath = 1,
-        kOutlineType_RoundRect = 2
+        kOutlineType_Empty = 1,
+        kOutlineType_ConvexPath = 2,
+        kOutlineType_RoundRect = 3
     };
 
     bool mShouldClip;
diff --git a/libs/hwui/RenderNode.cpp b/libs/hwui/RenderNode.cpp
index fe03806..3eb779f 100644
--- a/libs/hwui/RenderNode.cpp
+++ b/libs/hwui/RenderNode.cpp
@@ -581,7 +581,7 @@ void RenderNode::buildZSortedChildList(Vector<ZDrawRenderNodeOpPair>& zTranslate
 
 template <class T>
 void RenderNode::issueDrawShadowOperation(const Matrix4& transformFromParent, T& handler) {
-    if (properties().getAlpha() <= 0.0f || properties().getOutline().isEmpty()) return;
+    if (properties().getAlpha() <= 0.0f || !properties().getOutline().getPath()) return;
 
     mat4 shadowMatrixXY(transformFromParent);
     applyViewPropertyTransforms(shadowMatrixXY);
@@ -776,16 +776,23 @@ void RenderNode::issueOperationsOfProjectedChildren(OpenGLRenderer& renderer, T&
  */
 template <class T>
 void RenderNode::issueOperations(OpenGLRenderer& renderer, T& handler) {
+    const int level = handler.level();
+    if (mDisplayListData->isEmpty()) {
+        DISPLAY_LIST_LOGD("%*sEmpty display list (%p, %s)", level * 2, "", this, getName());
+        return;
+    }
+
     const bool drawLayer = (mLayer && (&renderer != mLayer->renderer));
     // If we are updating the contents of mLayer, we don't want to apply any of
     // the RenderNode's properties to this issueOperations pass. Those will all
     // be applied when the layer is drawn, aka when this is true.
     const bool useViewProperties = (!mLayer || drawLayer);
-
-    const int level = handler.level();
-    if (mDisplayListData->isEmpty() || (useViewProperties && properties().getAlpha() <= 0)) {
-        DISPLAY_LIST_LOGD("%*sEmpty display list (%p, %s)", level * 2, "", this, getName());
-        return;
+    if (useViewProperties) {
+        const Outline& outline = properties().getOutline();
+        if (properties().getAlpha() <= 0 || (outline.getShouldClip() && outline.isEmpty())) {
+            DISPLAY_LIST_LOGD("%*sRejected display list (%p, %s)", level * 2, "", this, getName());
+            return;
+        }
     }
 
     handler.startMark(getName());