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Side by Side Diff: remoting/capturer/differ_block.h

Issue 11470028: Move screen capturers to remoting/capturer. (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src
Patch Set: Created 8 years ago
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1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. 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 2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file. 3 // found in the LICENSE file.
4 4
5 #ifndef REMOTING_HOST_DIFFER_BLOCK_H_ 5 #ifndef REMOTING_HOST_DIFFER_BLOCK_H_
6 #define REMOTING_HOST_DIFFER_BLOCK_H_ 6 #define REMOTING_HOST_DIFFER_BLOCK_H_
7 7
8 #include "base/basictypes.h" 8 #include "base/basictypes.h"
9 9
10 namespace remoting { 10 namespace remoting {
11 11
12 // Size (in pixels) of each square block used for diffing. 12 // Size (in pixels) of each square block used for diffing.
13 // This must be a multiple of sizeof(uint64)/8. 13 // This must be a multiple of sizeof(uint64)/8.
14 static const int kBlockSize = 32; 14 static const int kBlockSize = 32;
15 15
16 // Format: BGRA 32 bit. 16 // Format: BGRA 32 bit.
17 static const int kBytesPerPixel = 4; 17 static const int kBytesPerPixel = 4;
18 18
19 // Low level functions to compare 2 blocks of pixels. 19 // Low level functions to compare 2 blocks of pixels.
20 // zero means the blocks are identical. 20 // zero means the blocks are identical.
21 // one means the blocks are different. 21 // one means the blocks are different.
22 int BlockDifference(const uint8* image1, const uint8* image2, int stride); 22 int BlockDifference(const uint8* image1, const uint8* image2, int stride);
23 23
24 } // namespace remoting 24 } // namespace remoting
25 25
26 #endif // REMOTING_HOST_DIFFER_BLOCK_H_ 26 #endif // REMOTING_HOST_DIFFER_BLOCK_H_
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