blob: c8a5c0406f4b6410528d14746bb730a0a738a6ee [file] [log] [blame]
* 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 SkBitmapHasher_DEFINED
#define SkBitmapHasher_DEFINED
#include "SkBitmap.h"
* Static class that generates a uint64 hash digest from an SkBitmap.
class SkBitmapHasher {
* Fills in "result" with a hash of the pixels in this bitmap.
* If this is unable to compute the hash for some reason,
* it returns false.
* Note: depending on the bitmap colortype, we may need to create an
* intermediate SkBitmap and copy the pixels over to it... so in some
* cases, performance and memory usage can suffer.
static bool ComputeDigest(const SkBitmap& bitmap, uint64_t *result);
static bool ComputeDigestInternal(const SkBitmap& bitmap, uint64_t *result);