Culling API

src/core/SkPictureRecord.h

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkPictureRecord_DEFINED
 #define SkPictureRecord_DEFINED
 
@@ skipping 98 matching lines @@
     void beginRecording();
     void endRecording();
 
 private:
     void handleOptimization(int opt);
     int recordRestoreOffsetPlaceholder(SkRegion::Op);
     void fillRestoreOffsetPlaceholdersForCurrentStackLevel(uint32_t restoreOffset);
 
 #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
     };
 #endif
 
     /*
      * Write the 'drawType' operation and chunk size to the skp. 'size'
      * can potentially be increased if the chunk size needs its own storage
      * location (i.e., it overflows 24 bits).
@@ skipping 85 matching lines @@
     void validateRegions() const;
 #else
 public:
     void validate(size_t initialOffset, uint32_t size) const {
         SkASSERT(fWriter.bytesWritten() == initialOffset + size);
     }
 #endif
 
 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().
     static void ComputeFontMetricsTopBottom(const SkPaint& paint, SkScalar topbot[2]);
 
     // Make sure that flat has fTopBot written.
     static void WriteTopBot(const SkPaint& paint, const SkFlatData& flat) {
         if (!flat.isTopBotWritten()) {
             ComputeFontMetricsTopBottom(paint, flat.writableTopBot());
             SkASSERT(flat.isTopBotWritten());
@@ skipping 52 matching lines @@
     friend class SkPictureTester; // for unit testing
 
 #ifdef SK_COLLAPSE_MATRIX_CLIP_STATE
     SkMatrixClipStateMgr fMCMgr;
 #endif
 
     typedef SkCanvas INHERITED;
 };
 
 #endif