Improve DisplayList state output

bug:17991451

Log hardware layers and shadow casting

Change-Id: I2ae40f270d18f5b2a5af985513e0f5e8841216c2

libs/hwui/RenderNode.cpp

@@ -105,8 +105,11 @@ void RenderNode::setStagingDisplayList(DisplayListData* data) {
  * display list. This function should remain in sync with the replay() function.
  */
 void RenderNode::output(uint32_t level) {
-    ALOGD("%*sStart display list (%p, %s, render=%d)", (level - 1) * 2, "", this,
-            getName(), isRenderable());
+    ALOGD("%*sStart display list (%p, %s%s%s%s)", (level - 1) * 2, "", this,
+            getName(),
+            (properties().hasShadow() ? ", casting shadow" : ""),
+            (isRenderable() ? "" : ", empty"),
+            (mLayer != NULL ? ", on HW Layer" : ""));
     ALOGD("%*s%s %d", level * 2, "", "Save",
             SkCanvas::kMatrix_SaveFlag | SkCanvas::kClip_SaveFlag);
 

libs/hwui/RenderProperties.h

@@ -570,7 +570,7 @@ public:
     }
 
     bool hasShadow() const {
-        return getZ() >= 0.0f
+        return getZ() > 0.0f
                 && getOutline().getPath() != NULL
                 && getOutline().getAlpha() != 0.0f;
     }

libs/hwui/tests/Android.mk

@@ -19,6 +19,7 @@ LOCAL_PATH:= $(call my-dir)
 include $(CLEAR_VARS)
 
 LOCAL_CFLAGS += -DUSE_OPENGL_RENDERER -DEGL_EGLEXT_PROTOTYPES -DGL_GLEXT_PROTOTYPES
+LOCAL_CFLAGS += -Wno-unused-parameter
 LOCAL_CFLAGS += -DATRACE_TAG=ATRACE_TAG_VIEW -DLOG_TAG=\"OpenGLRenderer\"
 
 LOCAL_SRC_FILES:= \