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.
5 #ifndef UI_GFX_GEOMETRY_SAFE_INTEGER_CONVERSIONS_H_
6 #define UI_GFX_GEOMETRY_SAFE_INTEGER_CONVERSIONS_H_
11 #include "ui/gfx/gfx_export.h"
15 inline int ClampToInt(float value) {
17 return 0; // no int NaN.
18 if (value >= std::numeric_limits<int>::max())
19 return std::numeric_limits<int>::max();
20 if (value <= std::numeric_limits<int>::min())
21 return std::numeric_limits<int>::min();
22 return static_cast<int>(value);
25 inline int ToFlooredInt(float value) {
26 return ClampToInt(std::floor(value));
29 inline int ToCeiledInt(float value) {
30 return ClampToInt(std::ceil(value));
33 inline int ToFlooredInt(double value) {
34 return ClampToInt(std::floor(value));
37 inline int ToCeiledInt(double value) {
38 return ClampToInt(std::ceil(value));
41 inline int ToRoundedInt(float value) {
44 rounded = std::floor(value + 0.5f);
46 rounded = std::ceil(value - 0.5f);
47 return ClampToInt(rounded);
50 inline int ToRoundedInt(double value) {
53 rounded = std::floor(value + 0.5);
55 rounded = std::ceil(value - 0.5);
56 return ClampToInt(rounded);
59 inline bool IsExpressibleAsInt(float value) {
61 return false; // no int NaN.
62 if (value > std::numeric_limits<int>::max())
64 if (value < std::numeric_limits<int>::min())
71 #endif // UI_GFX_GEOMETRY_SAFE_INTEGER_CONVERSIONS_H_