Lowestvariance section image space image effects with directx pixel shaders float

mean = tex2D(meanMap,In.texCoord);
total =0;

// Compute the the partial variance for the L-shape.

sampleCoords[2] = In.texCoord + sampleOffsets[5] + sampleOffsets[6]; //dn left

sampleCoords[3] = In.texCoord + sampleOffsets[7] + sampleOffsets[7]; //dn right

// Compare the winners of the two previous compares.

if( l2a < la )
{
lowestVariance = lowestVariance2;
}