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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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