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/*
* Copyright 2017 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SkUnPreMultiplyPriv_DEFINED
#define SkUnPreMultiplyPriv_DEFINED
#include "SkColor.h"
#include "SkUnPreMultiply.h"
template <bool kSwapRB>
void SkUnpremultiplyRow(uint32_t* dst, const uint32_t* src, int count) {
const SkUnPreMultiply::Scale* table = SkUnPreMultiply::GetScaleTable();
for (int i = 0; i < count; i++) {
uint32_t c = *src++;
uint8_t r, g, b, a;
if (kSwapRB) {
r = (c >> 16) & 0xFF;
g = (c >> 8) & 0xFF;
b = (c >> 0) & 0xFF;
a = (c >> 24) & 0xFF;
} else {
r = (c >> 0) & 0xFF;
g = (c >> 8) & 0xFF;
b = (c >> 16) & 0xFF;
a = (c >> 24) & 0xFF;
}
if (0 != a && 255 != a) {
SkUnPreMultiply::Scale scale = table[a];
r = SkUnPreMultiply::ApplyScale(scale, r);
g = SkUnPreMultiply::ApplyScale(scale, g);
b = SkUnPreMultiply::ApplyScale(scale, b);
}
*dst++ = (r << 0) | (g << 8) | (b << 16) | (a << 24);
}
}
#endif
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