1 /* 2 * Copyright 2016 Google Inc. 3 * 4 * Use of this source code is governed by a BSD-style license that can be 5 * found in the LICENSE file. 6 */ 7 8 #ifndef SkPM4f_DEFINED 9 #define SkPM4f_DEFINED 10 11 #include "SkColorData.h" 12 #include "SkNx.h" 13 14 static inline Sk4f swizzle_rb(const Sk4f& x) { 15 return SkNx_shuffle<2, 1, 0, 3>(x); 16 } 17 18 static inline Sk4f swizzle_rb_if_bgra(const Sk4f& x) { 19 #ifdef SK_PMCOLOR_IS_BGRA 20 return swizzle_rb(x); 21 #else 22 return x; 23 #endif 24 } 25 26 /* 27 * The float values are 0...1 premultiplied in RGBA order (regardless of SkPMColor order) 28 */ 29 struct SK_API SkPM4f { 30 enum { 31 R, G, B, A, 32 }; 33 float fVec[4]; 34 35 float r() const { return fVec[R]; } 36 float g() const { return fVec[G]; } 37 float b() const { return fVec[B]; } 38 float a() const { return fVec[A]; } 39 40 static SkPM4f FromPremulRGBA(float r, float g, float b, float a) { 41 SkPM4f p; 42 p.fVec[R] = r; 43 p.fVec[G] = g; 44 p.fVec[B] = b; 45 p.fVec[A] = a; 46 return p; 47 } 48 49 static SkPM4f From4f(const Sk4f& x) { 50 SkPM4f pm; 51 x.store(pm.fVec); 52 return pm; 53 } 54 static SkPM4f FromF16(const uint16_t[4]); 55 static SkPM4f FromPMColor(SkPMColor); 56 57 Sk4f to4f() const { return Sk4f::Load(fVec); } 58 Sk4f to4f_rgba() const { return this->to4f(); } 59 Sk4f to4f_bgra() const { return swizzle_rb(this->to4f()); } 60 Sk4f to4f_pmorder() const { return swizzle_rb_if_bgra(this->to4f()); } 61 62 SkPMColor toPMColor() const { 63 Sk4f value = swizzle_rb_if_bgra(this->to4f()); 64 SkPMColor result; 65 SkNx_cast<uint8_t>(value * Sk4f(255) + Sk4f(0.5f)).store(&result); 66 return result; 67 } 68 69 void toF16(uint16_t[4]) const; 70 uint64_t toF16() const; // 4 float16 values packed into uint64_t 71 72 SkColor4f unpremul() const; 73 74 #ifdef SK_DEBUG 75 void assertIsUnit() const; 76 #else 77 void assertIsUnit() const {} 78 #endif 79 }; 80 81 #endif 82
