Add comment describing SkColorTable constructor.

include/core/SkColorTable.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 SkColorTable_DEFINED
 #define SkColorTable_DEFINED
 
 #include "SkColor.h"
 #include "SkFlattenable.h"
 #include "SkImageInfo.h"
 #include "SkLazyPtr.h"
 
 /** \class SkColorTable
 
     SkColorTable holds an array SkPMColors (premultiplied 32-bit colors) used by
     8-bit bitmaps, where the bitmap bytes are interpreted as indices into the colortable.
 
     SkColorTable is thread-safe.
 */
 class SK_API SkColorTable : public SkRefCnt {
 public:
     SK_DECLARE_INST_COUNT(SkColorTable)
 
+    /** Copy up to 256 colors into a new SkColorTable.
+     */
     SkColorTable(const SkPMColor colors[], int count);
     virtual ~SkColorTable();
 
     /** Returns the number of colors in the table.
      */
     int count() const { return fCount; }
 
     /** Returns the specified color from the table. In the debug build, this asserts that
      *  the index is in range (0 <= index < count).
      */
@@ skipping 19 matching lines @@
     SkPMColor*                          fColors;
     SkLazyPtr<uint16_t, Free16BitCache> f16BitCache;
     int                                 fCount;
 
     void init(const SkPMColor* colors, int count);
 
     typedef SkRefCnt INHERITED;
 };
 
 #endif