Trim the copy of the dst made for dst-reading effects using the clip and dev-bounds of draw.

include/core/SkTLazy.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.
  */
 
 
 
@@ skipping 63 matching lines @@
         return fPtr;
     }
 
     /**
      *  Returns true if a valid object has been initialized in the SkTLazy,
      *  false otherwise.
      */
     bool isValid() const { return NULL != fPtr; }
 
     /**
-     *  Returns either NULL, or a copy of the object that was passed to
-     *  set() or the constructor.
+     * Returns the object. This version should only be called when the caller
+     * knows that the object has been initialized.
      */
     T* get() const { SkASSERT(this->isValid()); return fPtr; }
+    
+    /**
+     * Like above but doesn't assert if object isn't initialized (in which case
+     * NULL is returned).
+     */
+    T* getMaybeNull() const { return fPtr; }
 
 private:
     friend void* operator new<T>(size_t, SkTLazy* lazy);
 
     T*   fPtr; // NULL or fStorage
     char fStorage[sizeof(T)];
 };
 
 // Use the below macro (SkNEW_IN_TLAZY) rather than calling this directly
 template <typename T> void* operator new(size_t, SkTLazy<T>* lazy) {
@@ skipping 69 matching lines @@
     operator const T*() const { return fObj; }
 
     const T& operator *() const { return *fObj; }
 
 private:
     const T*    fObj;
     SkTLazy<T>  fLazy;
 };
 
 #endif