how needs float or double

Former-commit-id: 4636317442582ed070b7e5b60a1c1671ee04fe49
Former-commit-id: b9cfab5bc32cd78a1f3c6ea65b3eb3026214dc66
Former-commit-id: 0cd0ab47777a3a93bb5a4edb0b9cd644b7311d55

src/ImageProcessorCore/Samplers/Processors/SkewProcessor.cs

@@ -116,13 +116,13 @@ namespace ImageProcessorCore
                       deltaX = (((skewMaxX * sy)) / (source.Height - 1));
                   }
 
-
+                  int off = (skewMaxY*skewMaxX)/(source.Width - skewMaxX - 1);
                   for (int sx = 0; sx < source.Width; sx++)
                   {
                       int deltaY;
                       if (revY)
                       {
-                          deltaY = ((((-skewMaxY*(sx + deltaX)))/(source.Width-skewMaxX - 1)))+skewMaxY;
+                          deltaY = ((((-skewMaxY*(sx + deltaX)))/(source.Width-skewMaxX - 1)))+skewMaxY+off;
                           //deltaY = (((skewMaxY * sx)) / (source.Height - 1));
                           // deltaY = -deltaY + skewMaxY;
                          // deltaY = sx+deltaX;