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1755     SkScalar cos1, sin1;
1788         cos1 = 1;
1806         cos1 = SkDoubleToScalar(Sb); sin1 = SkDoubleToScalar(w1 - Sa);
1807         SkScalar reciplen = SkScalarInvert(SkScalarSqrt(cos1*cos1 + sin1*sin1));
1808         cos1 *= reciplen;
1812         cos2 = cos1*cosQ - sin1*sinQ;
1813         sin2 = sin1*cosQ + cos1*sinQ;
1824         rotation1->fX = cos1;