Culling API

src/core/SkPictureRecord.h

Index: src/core/SkPictureRecord.h
diff --git a/src/core/SkPictureRecord.h b/src/core/SkPictureRecord.h
index 0df120b31a121b54f5681e6bed5dc3e75fc5cab3..b9345fedc26a092ad452513f1df899b0c1e63b1d 100644
--- a/src/core/SkPictureRecord.h
+++ b/src/core/SkPictureRecord.h
@@ -116,6 +116,7 @@ private:
 
 #ifndef SK_COLLAPSE_MATRIX_CLIP_STATE
     SkTDArray<int32_t> fRestoreOffsetStack;
+    SkTDArray<uint32_t> fCullOffsetStack;

[caryclark, 2014/02/14 14:54:35]

Since the restore offset stack is int and the cull offset stack is uint, I'm
going to assume that they use their offsets differently.

[f(malita), 2014/02/20 02:37:26]

Indeed: we store negative values in fRestoreOffsetStack (-offset) to distinguish
between save and clip skip offsets, whereas fCullOffsetStack only stores
actual/positive offsets.

     int fFirstSavedLayerIndex;
     enum {
         kNoSavedLayerIndex = -1
@@ -221,6 +222,8 @@ public:
 
 protected:
     virtual SkSurface* onNewSurface(const SkImageInfo&) SK_OVERRIDE;
+    virtual void onPushCull(const SkRect&) SK_OVERRIDE;
+    virtual void onPopCull() SK_OVERRIDE;
 
     // Return fontmetrics.fTop,fBottom in topbot[0,1], after they have been
     // tweaked by paint.computeFastBounds().