| /* |
| * Copyright 2016 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "SkColorPriv.h" |
| #include "SkNx.h" |
| |
| static inline float get_alpha(const Sk4f& f4) { |
| return f4.kth<SkPM4f::A>(); |
| } |
| |
| static inline Sk4f set_alpha(const Sk4f& f4, float alpha) { |
| static_assert(3 == SkPM4f::A, ""); |
| return Sk4f(f4.kth<0>(), f4.kth<1>(), f4.kth<2>(), alpha); |
| } |
| |
| static inline uint32_t to_4b(const Sk4f& f4) { |
| uint32_t b4; |
| SkNx_cast<uint8_t>(f4).store((uint8_t*)&b4); |
| return b4; |
| } |
| |
| static inline Sk4f to_4f(uint32_t b4) { |
| return SkNx_cast<float>(Sk4b::Load((const uint8_t*)&b4)); |
| } |
| |
| static inline Sk4f srgb_to_linear(const Sk4f& s4) { |
| return set_alpha(s4 * s4, get_alpha(s4)); |
| } |
| |
| static inline Sk4f linear_to_srgb(const Sk4f& l4) { |
| return set_alpha(l4.sqrt(), get_alpha(l4)); |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////////////////////////// |
| |
| static inline Sk4f Sk4f_fromL32(uint32_t src) { |
| return to_4f(src) * Sk4f(1.0f/255); |
| } |
| |
| static inline Sk4f Sk4f_fromS32(uint32_t src) { |
| return srgb_to_linear(to_4f(src) * Sk4f(1.0f/255)); |
| } |
| |
| static inline uint32_t Sk4f_toL32(const Sk4f& x4) { |
| return to_4b(x4 * Sk4f(255) + Sk4f(0.5f)); |
| } |
| |
| static inline uint32_t Sk4f_toS32(const Sk4f& x4) { |
| return to_4b(linear_to_srgb(x4) * Sk4f(255) + Sk4f(0.5f)); |
| } |