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| 1 // Copyright (c) 2012 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 #include <cmath> |
| 6 #include <limits> |
| 7 |
| 8 namespace gfx { |
| 9 |
| 10 int ClampToInt(float value) { |
| 11 if (value != value) |
| 12 return 0; // no int NaN. |
| 13 if (value > std::numeric_limits<int>::max()) |
| 14 return std::numeric_limits<int>::max(); |
| 15 if (value < std::numeric_limits<int>::min()) |
| 16 return std::numeric_limits<int>::min(); |
| 17 return static_cast<int>(value); |
| 18 } |
| 19 |
| 20 int ToFlooredInt(float value) { |
| 21 return ClampToInt(std::floor(value)); |
| 22 } |
| 23 |
| 24 int ToCeiledInt(float value) { |
| 25 return ClampToInt(std::ceil(value)); |
| 26 } |
| 27 |
| 28 } // namespace gfx |
| 29 |
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