cache SkImage::Info calculation in lazypixelref

src/lazy/SkLazyPixelRef.h

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkLazyPixelRef_DEFINED
 #define SkLazyPixelRef_DEFINED
 
@@ skipping 54 matching lines @@
     virtual bool onDecodeInto(int pow2, SkBitmap*) SK_OVERRIDE;
 
 private:
     bool                        fErrorInDecoding;
     SkData*                     fData;
     SkBitmapFactory::DecodeProc fDecodeProc;
     SkImageCache*               fImageCache;
     intptr_t                    fCacheId;
     size_t                      fRowBytes;
 
+    const SkImage::Info* getInfo();

[scroggo, 2013/10/21 18:34:17]

Could you add comments that fInfo should never be used directly, and getInfo
should be called instead?

[reed1, 2013/10/21 18:46:10]

Done.

+
+    SkImage::Info               fInfo;

[scroggo, 2013/10/21 18:34:17]

Style nit: fields before methods

[reed1, 2013/10/21 18:46:10]

Done.

+
 #if LAZY_CACHE_STATS
     static int32_t              gCacheHits;
     static int32_t              gCacheMisses;
 #endif
 
     typedef SkPixelRef INHERITED;
 };
 
 #endif  // SkLazyPixelRef_DEFINED