gfx/skia/trunk/src/utils/SkBitmapHasher.h@deefc01c0e14
gfx/skia/trunk/src/utils/SkBitmapHasher.h
Thu, 15 Jan 2015 21:03:48 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Thu, 15 Jan 2015 21:03:48 +0100
- branch
- TOR_BUG_9701
- changeset 11
- deefc01c0e14
- permissions
- -rw-r--r--
Integrate friendly tips from Tor colleagues to make (or not) 4.5 alpha 3;
This includes removal of overloaded (but unused) methods, and addition of
a overlooked call to DataStruct::SetData(nsISupports, uint32_t, bool.)
2 /*
3 * Copyright 2012 Google Inc.
4 *
5 * Use of this source code is governed by a BSD-style license that can be
6 * found in the LICENSE file.
7 */
9 #ifndef SkBitmapHasher_DEFINED
10 #define SkBitmapHasher_DEFINED
12 #include "SkBitmap.h"
14 /**
15 * Static class that generates a uint64 hash digest from an SkBitmap.
16 */
17 class SkBitmapHasher {
18 public:
19 /**
20 * Fills in "result" with a hash of the pixels in this bitmap.
21 *
22 * If this is unable to compute the hash for some reason,
23 * it returns false.
24 *
25 * Note: depending on the bitmap config, we may need to create an
26 * intermediate SkBitmap and copy the pixels over to it... so in some
27 * cases, performance and memory usage can suffer.
28 */
29 static bool ComputeDigest(const SkBitmap& bitmap, uint64_t *result);
31 private:
32 static bool ComputeDigestInternal(const SkBitmap& bitmap, uint64_t *result);
33 };
35 #endif
