/// <summary>
/// This is the XBR4x by Hyllian (see http://board.byuu.org/viewtopic.php?f=10&t=2248)
/// </summary>
public static void Xbr4X(IPixelWorker <sPixel> worker, bool allowAlphaBlending)
{
Contract.Assume(worker != null);
var a1 = worker.SourceM1M2();
var b1 = worker.SourceP0M2();
var c1 = worker.SourceP1M2();
var a0 = worker.SourceM2M1();
var pa = worker.SourceM1M1();
var pb = worker.SourceP0M1();
var pc = worker.SourceP1M1();
var c4 = worker.SourceP2M1();
var d0 = worker.SourceM2P0();
var pd = worker.SourceM1P0();
var pe = worker.SourceP0P0();
var pf = worker.SourceP1P0();
var f4 = worker.SourceP2P0();
var g0 = worker.SourceM2P1();
var pg = worker.SourceM1P1();
var ph = worker.SourceP0P1();
var pi = worker.SourceP1P1();
var i4 = worker.SourceP2P1();
var g5 = worker.SourceM1P2();
var h5 = worker.SourceP0P2();
var i5 = worker.SourceP1P2();
sPixel e1, e2, e3, e4, e5, e6, e7, e8, e9, ea, eb, ec, ed, ee, ef;
var e0 = e1 = e2 = e3 = e4 = e5 = e6 = e7 = e8 = e9 = ea = eb = ec = ed = ee = ef = pe;
_Kernel4Xv2(pe, pi, ph, pf, pg, pc, pd, pb, f4, i4, h5, i5, ref ef, ref ee, ref eb, ref e3, ref e7, ref ea, ref ed, ref ec, allowAlphaBlending);
_Kernel4Xv2(pe, pc, pf, pb, pi, pa, ph, pd, b1, c1, f4, c4, ref e3, ref e7, ref e2, ref e0, ref e1, ref e6, ref eb, ref ef, allowAlphaBlending);
_Kernel4Xv2(pe, pa, pb, pd, pc, pg, pf, ph, d0, a0, b1, a1, ref e0, ref e1, ref e4, ref ec, ref e8, ref e5, ref e2, ref e3, allowAlphaBlending);
_Kernel4Xv2(pe, pg, pd, ph, pa, pi, pb, pf, h5, g5, d0, g0, ref ec, ref e8, ref ed, ref ef, ref ee, ref e9, ref e4, ref e0, allowAlphaBlending);
worker.TargetP0P0(e0);
worker.TargetP1P0(e1);
worker.TargetP2P0(e2);
worker.TargetP3P0(e3);
worker.TargetP0P1(e4);
worker.TargetP1P1(e5);
worker.TargetP2P1(e6);
worker.TargetP3P1(e7);
worker.TargetP0P2(e8);
worker.TargetP1P2(e9);
worker.TargetP2P2(ea);
worker.TargetP3P2(eb);
worker.TargetP0P3(ec);
worker.TargetP1P3(ed);
worker.TargetP2P3(ee);
worker.TargetP3P3(ef);
}