| // Copyright 2018 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef THIRD_PARTY_BLINK_RENDERER_PLATFORM_GEOMETRY_BLEND_H_ |
| #define THIRD_PARTY_BLINK_RENDERER_PLATFORM_GEOMETRY_BLEND_H_ |
| |
| #include "third_party/blink/renderer/platform/geometry/float_point.h" |
| #include "third_party/blink/renderer/platform/geometry/int_point.h" |
| #include "third_party/blink/renderer/platform/geometry/layout_unit.h" |
| #include "third_party/blink/renderer/platform/platform_export.h" |
| #include "third_party/blink/renderer/platform/wtf/math_extras.h" |
| |
| #include <type_traits> |
| |
| namespace blink { |
| |
| inline int Blend(int from, int to, double progress) { |
| return static_cast<int>(lround(from + (to - from) * progress)); |
| } |
| |
| // For unsigned types. |
| template <typename T> |
| inline T Blend(T from, T to, double progress) { |
| static_assert(std::is_integral<T>::value, |
| "blend can only be used with integer types"); |
| return clampTo<T>(round(to > from ? from + (to - from) * progress |
| : from - (from - to) * progress)); |
| } |
| |
| inline double Blend(double from, double to, double progress) { |
| return from + (to - from) * progress; |
| } |
| |
| inline float Blend(float from, float to, double progress) { |
| return static_cast<float>(from + (to - from) * progress); |
| } |
| |
| inline LayoutUnit Blend(LayoutUnit from, LayoutUnit to, double progress) { |
| return LayoutUnit(from + (to - from) * progress); |
| } |
| |
| inline IntPoint Blend(const IntPoint& from, |
| const IntPoint& to, |
| double progress) { |
| return IntPoint(Blend(from.X(), to.X(), progress), |
| Blend(from.Y(), to.Y(), progress)); |
| } |
| |
| inline FloatPoint Blend(const FloatPoint& from, |
| const FloatPoint& to, |
| double progress) { |
| return FloatPoint(Blend(from.X(), to.X(), progress), |
| Blend(from.Y(), to.Y(), progress)); |
| } |
| |
| } // namespace blink |
| |
| #endif // THIRD_PARTY_BLINK_RENDERER_PLATFORM_GEOMETRY_BLEND_H_ |