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1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 #ifndef REMOTING_HOST_DIFFER_BLOCK_H_ | |
6 #define REMOTING_HOST_DIFFER_BLOCK_H_ | |
7 | |
8 #include "base/basictypes.h" | |
9 | |
10 namespace remoting { | |
11 | |
12 // Size (in pixels) of each square block used for diffing. | |
13 // This must be a multiple of sizeof(uint64)/8. | |
14 static const int kBlockSize = 32; | |
15 | |
16 // Format: BGRA 32 bit. | |
17 static const int kBytesPerPixel = 4; | |
18 | |
19 // Low level functions to compare 2 blocks of pixels. | |
20 // zero means the blocks are identical. | |
21 // one means the blocks are different. | |
22 int BlockDifference(const uint8* image1, const uint8* image2, int stride); | |
23 | |
24 } // namespace remoting | |
25 | |
26 #endif // REMOTING_HOST_DIFFER_BLOCK_H_ | |
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