1 /* 2 * Copyright 2017 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 SkUnPreMultiplyPriv_DEFINED 9 #define SkUnPreMultiplyPriv_DEFINED 10 11 #include "SkColor.h" 12 #include "SkUnPreMultiply.h" 13 14 template <bool kSwapRB> 15 void SkUnpremultiplyRow(uint32_t* dst, const uint32_t* src, int count) { 16 const SkUnPreMultiply::Scale* table = SkUnPreMultiply::GetScaleTable(); 17 18 for (int i = 0; i < count; i++) { 19 uint32_t c = *src++; 20 uint8_t r, g, b, a; 21 if (kSwapRB) { 22 r = (c >> 16) & 0xFF; 23 g = (c >> 8) & 0xFF; 24 b = (c >> 0) & 0xFF; 25 a = (c >> 24) & 0xFF; 26 } else { 27 r = (c >> 0) & 0xFF; 28 g = (c >> 8) & 0xFF; 29 b = (c >> 16) & 0xFF; 30 a = (c >> 24) & 0xFF; 31 } 32 33 if (0 != a && 255 != a) { 34 SkUnPreMultiply::Scale scale = table[a]; 35 r = SkUnPreMultiply::ApplyScale(scale, r); 36 g = SkUnPreMultiply::ApplyScale(scale, g); 37 b = SkUnPreMultiply::ApplyScale(scale, b); 38 } 39 40 *dst++ = (r << 0) | (g << 8) | (b << 16) | (a << 24); 41 } 42 } 43 44 #endif 45
