Add SkSpecialImage::extractSubset & NewFromPixmap

include/core/SkPixmap.h

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkPixmap_DEFINED
 #define SkPixmap_DEFINED
 
@@ skipping 204 matching lines @@
      * alloc/tryAlloc was called.
      */
     static size_t AllocSize(const SkImageInfo& info, size_t* rowBytes);
 
     /**
      *  Returns an SkData object wrapping the allocated pixels memory, and resets the pixmap.
      *  If the storage hasn't been allocated, the result is NULL.
      */
     const SkData* SK_WARN_UNUSED_RESULT detachPixelsAsData();
 
+    void release();

[reed1, 2016/03/15 03:13:03]

Docs? What does this do differently from reset()?

[robertphillips, 2016/03/16 15:31:58]

Done.

+
     // We wrap these so we can clear our internal storage
 
     void reset() {
         this->freeStorage();
         this->INHERITED::reset();
     }
     void reset(const SkImageInfo& info, const void* addr, size_t rb, SkColorTable* ctable = NULL) {
         this->freeStorage();
         this->INHERITED::reset(info, addr, rb, ctable);
     }
@@ skipping 59 matching lines @@
 private:
     void        (*fUnlockProc)(void*);
     void*       fUnlockContext;
     SkPixmap    fPixmap;
     bool        fIsLocked;
 
     friend class SkBitmap;
 };
 
 #endif