Revert overdraw avoidance visualization change

bug:18787324

Partial revert of 23d307c8d88f4a3849163b9e5b7cd11d0d4f372c.

Change-Id: Ic8b91b046707fc5b8fa53c35ea7b37bb19c3c943

3 files changed, 13 insertions, 8 deletions

diff --git a/libs/hwui/DeferredDisplayList.cpp b/libs/hwui/DeferredDisplayList.cpp
index fab4a1a..a998594 100644
--- a/libs/hwui/DeferredDisplayList.cpp
+++ b/libs/hwui/DeferredDisplayList.cpp
@@ -525,7 +525,7 @@ void DeferredDisplayList::addDrawOp(OpenGLRenderer& renderer, DrawOp* op) {
     deferInfo.mergeable &= !recordingComplexClip();
     deferInfo.opaqueOverBounds &= !recordingComplexClip() && mSaveStack.isEmpty();
 
-    if (mBatches.size() &&
+    if (CC_LIKELY(mAvoidOverdraw) && mBatches.size() &&
             state->mClipSideFlags != kClipSide_ConservativeFull &&
             deferInfo.opaqueOverBounds && state->mBounds.contains(mBounds)) {
         // avoid overdraw by resetting drawing state + discarding drawing ops
@@ -677,12 +677,13 @@ status_t DeferredDisplayList::flush(OpenGLRenderer& renderer, Rect& dirty) {
     DrawModifiers restoreDrawModifiers = renderer.getDrawModifiers();
     renderer.save(SkCanvas::kMatrix_SaveFlag | SkCanvas::kClip_SaveFlag);
 
-    for (unsigned int i = 1; i < mBatches.size(); i++) {
-        if (mBatches[i] && mBatches[i]->coversBounds(mBounds)) {
-            discardDrawingBatches(i - 1);
+    if (CC_LIKELY(mAvoidOverdraw)) {
+        for (unsigned int i = 1; i < mBatches.size(); i++) {
+            if (mBatches[i] && mBatches[i]->coversBounds(mBounds)) {
+                discardDrawingBatches(i - 1);
+            }
         }
     }
-
     // NOTE: depth of the save stack at this point, before playback, should be reflected in
     // FLUSH_SAVE_STACK_DEPTH, so that save/restores match up correctly
     status |= replayBatchList(mBatches, renderer, dirty);
diff --git a/libs/hwui/DeferredDisplayList.h b/libs/hwui/DeferredDisplayList.h
index 885b411..8a015b2 100644
--- a/libs/hwui/DeferredDisplayList.h
+++ b/libs/hwui/DeferredDisplayList.h
@@ -81,8 +81,8 @@ public:
 class DeferredDisplayList {
     friend class DeferStateStruct; // used to give access to allocator
 public:
-    DeferredDisplayList(const Rect& bounds) :
-            mBounds(bounds) {
+    DeferredDisplayList(const Rect& bounds, bool avoidOverdraw = true) :
+            mBounds(bounds), mAvoidOverdraw(avoidOverdraw) {
         clear();
     }
     ~DeferredDisplayList() { clear(); }
@@ -150,6 +150,7 @@ private:
 
     // layer space bounds of rendering
     Rect mBounds;
+    const bool mAvoidOverdraw;
 
     /**
      * At defer time, stores the *defer time* savecount of save/saveLayer ops that were deferred, so
diff --git a/libs/hwui/OpenGLRenderer.cpp b/libs/hwui/OpenGLRenderer.cpp
index 075f2c5..2b62684 100755
--- a/libs/hwui/OpenGLRenderer.cpp
+++ b/libs/hwui/OpenGLRenderer.cpp
@@ -1907,7 +1907,10 @@ status_t OpenGLRenderer::drawRenderNode(RenderNode* renderNode, Rect& dirty, int
             return status | replayStruct.mDrawGlStatus;
         }
 
-        DeferredDisplayList deferredList(*currentClipRect());
+        // Don't avoid overdraw when visualizing, since that makes it harder to
+        // debug where it's coming from, and when the problem occurs.
+        bool avoidOverdraw = !mCaches.debugOverdraw;
+        DeferredDisplayList deferredList(*currentClipRect(), avoidOverdraw);
         DeferStateStruct deferStruct(deferredList, *this, replayFlags);
         renderNode->defer(deferStruct, 0);