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63 lines
1.5 KiB
63 lines
1.5 KiB
4 months ago
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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef UI_GFX_GEOMETRY_SAFE_INTEGER_CONVERSIONS_H_
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#define UI_GFX_GEOMETRY_SAFE_INTEGER_CONVERSIONS_H_
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#include <cmath>
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#include <limits>
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#include "base/numerics/safe_conversions.h"
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#include "ui/gfx/gfx_export.h"
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namespace gfx {
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inline int ToFlooredInt(float value) {
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return base::saturated_cast<int>(std::floor(value));
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}
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inline int ToCeiledInt(float value) {
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return base::saturated_cast<int>(std::ceil(value));
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}
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inline int ToFlooredInt(double value) {
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return base::saturated_cast<int>(std::floor(value));
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}
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inline int ToCeiledInt(double value) {
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return base::saturated_cast<int>(std::ceil(value));
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}
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inline int ToRoundedInt(float value) {
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float rounded;
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if (value >= 0.0f)
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rounded = std::floor(value + 0.5f);
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else
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rounded = std::ceil(value - 0.5f);
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return base::saturated_cast<int>(rounded);
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}
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inline int ToRoundedInt(double value) {
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double rounded;
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if (value >= 0.0)
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rounded = std::floor(value + 0.5);
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else
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rounded = std::ceil(value - 0.5);
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return base::saturated_cast<int>(rounded);
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}
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inline bool IsExpressibleAsInt(float value) {
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if (value != value)
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return false; // no int NaN.
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if (value > std::numeric_limits<int>::max())
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return false;
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if (value < std::numeric_limits<int>::min())
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return false;
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return true;
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}
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} // namespace gfx
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#endif // UI_GFX_GEOMETRY_SAFE_INTEGER_CONVERSIONS_H_
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