| 1 | // Copyright 2013 The Flutter 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 FLUTTER_LIB_UI_FLOATING_POINT_H_ |
| 6 | #define FLUTTER_LIB_UI_FLOATING_POINT_H_ |
| 7 | |
| 8 | #include <algorithm> |
| 9 | #include <limits> |
| 10 | |
| 11 | namespace flutter { |
| 12 | |
| 13 | /// Converts a double to a float, truncating finite values that are larger than |
| 14 | /// FLT_MAX or smaller than FLT_MIN to those values. |
| 15 | static float SafeNarrow(double value) { |
| 16 | if (std::isinf(lcpp_x: value) || std::isnan(lcpp_x: value)) { |
| 17 | return static_cast<float>(value); |
| 18 | } else { |
| 19 | // Avoid truncation to inf/-inf. |
| 20 | return std::clamp(v: static_cast<float>(value), |
| 21 | lo: std::numeric_limits<float>::lowest(), |
| 22 | hi: std::numeric_limits<float>::max()); |
| 23 | } |
| 24 | } |
| 25 | |
| 26 | } // namespace flutter |
| 27 | |
| 28 | #endif // FLUTTER_LIB_UI_FLOATING_POINT_H_ |
| 29 |