void SkLerpXfermode::xfer32(SkPMColor dst[], const SkPMColor src[], int count,
const SkAlpha aa[]) const {
const int scale = fScale256;
if (aa) {
for (int i = 0; i < count; ++i) {
unsigned a = aa[i];
if (a) {
SkPMColor dstC = dst[i];
SkPMColor resC = SkFastFourByteInterp256(src[i], dstC, scale);
if (a < 255) {
resC = SkFastFourByteInterp256(resC, dstC, a + (a >> 7));
}
dst[i] = resC;
}
}
} else {
void SkLumaMaskXfermode::xfer32(SkPMColor dst[], const SkPMColor src[],
int count, const SkAlpha aa[]) const {
const SkPMColor* a = lumaOpA<SkPMColor>(fMode, src, dst);
const SkPMColor* b = lumaOpB<SkPMColor>(fMode, src, dst);
if (aa) {
for (int i = 0; i < count; ++i) {
unsigned cov = aa[i];
if (cov) {
unsigned resC = luma_proc(a[i], b[i]);
if (cov < 255) {
resC = SkFastFourByteInterp256(resC, dst[i],
SkAlpha255To256(cov));
}
dst[i] = resC;
}
}
} else {
for (int i = 0; i < count; ++i) {
dst[i] = luma_proc(a[i], b[i]);
}
}
}
