Add layer counting to SkPictureRecord

src/core/SkPictureContentInfo.cpp

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkPaint.h"
 #include "SkPathEffect.h"
 #include "SkPictureContentInfo.h"
@@ skipping 53 matching lines @@
         }
     }
 }
 
 void SkPictureContentInfo::onAddPaintPtr(const SkPaint* paint) {
     if (NULL != paint && NULL != paint->getPathEffect()) {
         ++fNumPaintWithPathEffectUses;
     }
 }
 
+void SkPictureContentInfo::onSaveLayer() {
+    *fSaveStack.append() = kSaveLayer_Flag;
+}
+
+void SkPictureContentInfo::onSave() {
+    *fSaveStack.append() = kSave_Flag;
+}
+
+void SkPictureContentInfo::onRestore() {
+    SkASSERT(fSaveStack.count() > 0);
+
+    bool containedSaveLayer = fSaveStack.top() & kContainedSaveLayer_Flag;
+
+    if (fSaveStack.top() & kSaveLayer_Flag) {
+        ++fNumLayers;
+        if (containedSaveLayer) {
+            ++fNumInteriorLayers;
+        } else {
+            ++fNumLeafLayers;
+        }
+        containedSaveLayer = true;
+    }
+
+    fSaveStack.pop();
+
+    if (containedSaveLayer && fSaveStack.count() > 0) {
+        fSaveStack.top() |= kContainedSaveLayer_Flag;
+    }
+}
+
+void SkPictureContentInfo::rescindLastSave() {
+    SkASSERT(fSaveStack.count() > 0);
+    SkASSERT(fSaveStack.top() & kSave_Flag);
+
+    bool containedSaveLayer = fSaveStack.top() & kContainedSaveLayer_Flag;
+
+    fSaveStack.pop();
+
+    if (containedSaveLayer && fSaveStack.count() > 0) {
+        fSaveStack.top() |= kContainedSaveLayer_Flag;
+    }
+}
+
+void SkPictureContentInfo::rescindLastSaveLayer() {
+    SkASSERT(fSaveStack.count() > 0);
+    SkASSERT(fSaveStack.top() & kSaveLayer_Flag);
+
+    bool containedSaveLayer = fSaveStack.top() & kContainedSaveLayer_Flag;
+
+    fSaveStack.pop();
+
+    if (containedSaveLayer && fSaveStack.count() > 0) {
+        fSaveStack.top() |= kContainedSaveLayer_Flag;
+    }
+}
+
 void SkPictureContentInfo::set(const SkPictureContentInfo& src) {
     fNumOperations = src.fNumOperations;
     fNumTexts = src.fNumTexts;
     fNumPaintWithPathEffectUses = src.fNumPaintWithPathEffectUses;
     fNumFastPathDashEffects = src.fNumFastPathDashEffects;
     fNumAAConcavePaths = src.fNumAAConcavePaths;
     fNumAAHairlineConcavePaths = src.fNumAAHairlineConcavePaths;
+    fNumLayers = src.fNumLayers;
+    fNumInteriorLayers = src.fNumInteriorLayers;
+    fNumLeafLayers = src.fNumLeafLayers;
+    fSaveStack = src.fSaveStack;
 }
 
 void SkPictureContentInfo::reset() {
     fNumOperations = 0;
     fNumTexts = 0;
     fNumPaintWithPathEffectUses = 0;
     fNumFastPathDashEffects = 0;
     fNumAAConcavePaths = 0;
     fNumAAHairlineConcavePaths = 0;
+    fNumLayers = 0;
+    fNumInteriorLayers = 0;
+    fNumLeafLayers = 0;
+    fSaveStack.rewind();
 }
 
 void SkPictureContentInfo::swap(SkPictureContentInfo* other) {
     SkTSwap(fNumOperations, other->fNumOperations);
     SkTSwap(fNumTexts, other->fNumTexts);
     SkTSwap(fNumPaintWithPathEffectUses, other->fNumPaintWithPathEffectUses);
     SkTSwap(fNumFastPathDashEffects, other->fNumFastPathDashEffects);
     SkTSwap(fNumAAConcavePaths, other->fNumAAConcavePaths);
     SkTSwap(fNumAAHairlineConcavePaths, other->fNumAAHairlineConcavePaths);
+    SkTSwap(fNumLayers, other->fNumLayers);
+    SkTSwap(fNumInteriorLayers, other->fNumInteriorLayers);
+    SkTSwap(fNumLeafLayers, other->fNumLeafLayers);
+    fSaveStack.swap(other->fSaveStack);
 }