gfx/skia/trunk/src/utils/SkBitmapHasher.h@deefc01c0e14 (annotated)
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.)
| michael@0 | 1 | |
| michael@0 | 2 | /* |
| michael@0 | 3 | * Copyright 2012 Google Inc. |
| michael@0 | 4 | * |
| michael@0 | 5 | * Use of this source code is governed by a BSD-style license that can be |
| michael@0 | 6 | * found in the LICENSE file. |
| michael@0 | 7 | */ |
| michael@0 | 8 | |
| michael@0 | 9 | #ifndef SkBitmapHasher_DEFINED |
| michael@0 | 10 | #define SkBitmapHasher_DEFINED |
| michael@0 | 11 | |
| michael@0 | 12 | #include "SkBitmap.h" |
| michael@0 | 13 | |
| michael@0 | 14 | /** |
| michael@0 | 15 | * Static class that generates a uint64 hash digest from an SkBitmap. |
| michael@0 | 16 | */ |
| michael@0 | 17 | class SkBitmapHasher { |
| michael@0 | 18 | public: |
| michael@0 | 19 | /** |
| michael@0 | 20 | * Fills in "result" with a hash of the pixels in this bitmap. |
| michael@0 | 21 | * |
| michael@0 | 22 | * If this is unable to compute the hash for some reason, |
| michael@0 | 23 | * it returns false. |
| michael@0 | 24 | * |
| michael@0 | 25 | * Note: depending on the bitmap config, we may need to create an |
| michael@0 | 26 | * intermediate SkBitmap and copy the pixels over to it... so in some |
| michael@0 | 27 | * cases, performance and memory usage can suffer. |
| michael@0 | 28 | */ |
| michael@0 | 29 | static bool ComputeDigest(const SkBitmap& bitmap, uint64_t *result); |
| michael@0 | 30 | |
| michael@0 | 31 | private: |
| michael@0 | 32 | static bool ComputeDigestInternal(const SkBitmap& bitmap, uint64_t *result); |
| michael@0 | 33 | }; |
| michael@0 | 34 | |
| michael@0 | 35 | #endif |
