O(1) SkPictureUtils::ApproxBytesUsed()

include/core/SkPicture.h

 /*
  * Copyright 2007 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 #ifndef SkPicture_DEFINED
 #define SkPicture_DEFINED
@@ skipping 239 matching lines @@
     // steps to generate new SKPs in (only accessible to Googlers): http://goo.gl/qATVcw
 
     // Only SKPs within the min/current picture version range (inclusive) can be read.
     static const uint32_t MIN_PICTURE_VERSION = 35;     // Produced by Chrome M39.
     static const uint32_t CURRENT_PICTURE_VERSION = 41;
 
     void createHeader(SkPictInfo* info) const;
     static bool IsValidPictInfo(const SkPictInfo& info);
 
     // Takes ownership of the SkRecord and (optional) SnapshotArray, refs the (optional) BBH.
-    SkPicture(const SkRect& cullRect, SkRecord*, SnapshotArray*, SkBBoxHierarchy*);
+    SkPicture(const SkRect& cullRect,
+             SkRecord*,
+             SnapshotArray*,
+             SkBBoxHierarchy*,
+             size_t approxBytesUsedBySubPictures);
 
     static SkPicture* Forwardport(const SkPictInfo&, const SkPictureData*);
     static SkPictureData* Backport(const SkRecord&, const SkPictInfo&,
                                    SkPicture const* const drawablePics[], int drawableCount);
 
     // uint32_t fRefCnt; from SkNVRefCnt<SkPicture>
     mutable uint32_t                      fUniqueID;
     const SkRect                          fCullRect;
     mutable SkAutoTUnref<const AccelData> fAccelData;
     SkAutoTUnref<const SkRecord>          fRecord;
     SkAutoTUnref<const SkBBoxHierarchy>   fBBH;
     SkAutoTDelete<const SnapshotArray>    fDrawablePicts;
+    size_t                                fApproxBytesUsedBySubPictures;

[reed1, 2015/04/21 22:13:04]

can this field be const?

[mtklein, 2015/04/21 22:18:31]

Yes, done.

 
     // helpers for fDrawablePicts
     int drawableCount() const;
     // will return NULL if drawableCount() returns 0
     SkPicture const* const* drawablePicts() const;
 
     struct PathCounter;
 
     struct Analysis {
         Analysis() {}  // Only used by SkPictureData codepath.
         explicit Analysis(const SkRecord&);
 
         bool suitableForGpuRasterization(const char** reason, int sampleCount) const;
 
         bool        fWillPlaybackBitmaps;
         bool        fHasText;
         int         fNumPaintWithPathEffectUses;
         int         fNumFastPathDashEffects;
         int         fNumAAConcavePaths;
         int         fNumAAHairlineConcavePaths;
         int         fNumAADFEligibleConcavePaths;
     } fAnalysis;
 
     friend class SkPictureRecorder;            // SkRecord-based constructor.
     friend class GrLayerHoister;               // access to fRecord
     friend class ReplaceDraw;
     friend class SkPictureUtils;
     friend class SkRecordedDrawable;
 };
-SK_COMPILE_ASSERT(sizeof(SkPicture) <= 96, SkPictureSize);
+SK_COMPILE_ASSERT(sizeof(SkPicture) <= 104, SkPictureSize);
 
 #endif