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23 bool SkSetPoly3To3(SkMatrix* matrix, const SkPoint src[3], const SkPoint dst[3]) {
49     matrix->reset();
50     matrix->setScaleX(dot(srcOP0, srcOP1, dstOP[0], dstOP[2]));
51     matrix->setSkewX( dot(srcOP2, srcOP3, dstOP[0], dstOP[2]));
52     matrix->setSkewY (dot(srcOP0, srcOP1, dstOP[1], dstOP[3]));
53     matrix->setScaleY(dot(srcOP2, srcOP3, dstOP[1], dstOP[3]));
54     matrix->setTranslateX(dstAve.fX - dot(srcAve.fX, srcAve.fY,
55                                     matrix->getScaleX(), matrix->getSkewX()));
56     matrix->setTranslateY(dstAve.fY - dot(srcAve.fX, srcAve.fY,
57                                     matrix->getSkewY(), matrix->getScaleY()));