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 "SkColorPriv.h" 12 13 /* 14 * The float values are 0...1 premultiplied 15 */ 16 struct SkPM4f { 17 enum { 18 A = SK_A32_SHIFT/8, 19 R = SK_R32_SHIFT/8, 20 G = SK_G32_SHIFT/8, 21 B = SK_B32_SHIFT/8, 22 }; 23 float fVec[4]; 24 25 float a() const { return fVec[A]; } 26 27 SkColor4f unpremul() const; 28 29 static SkPM4f FromPMColor(SkPMColor); 30 31 // half-float routines 32 void toF16(uint16_t[4]) const; 33 uint64_t toF16() const; // 4 float16 values packed into uint64_t 34 static SkPM4f FromF16(const uint16_t[4]); 35 36 #ifdef SK_DEBUG 37 void assertIsUnit() const; 38 #else 39 void assertIsUnit() const {} 40 #endif 41 }; 42 43 typedef SkPM4f (*SkXfermodeProc4f)(const SkPM4f& src, const SkPM4f& dst); 44 45 46 #endif 47
