MemBitmap GetTransformedBitmapNoInterpolation()
{
var destCB = new MemBitmap(_destBounds.Width, _destBounds.Height);
#if DEBUG
destCB._dbugNote = "GetTransformedBitmapNoInterpolation()";
#endif
var destWriter = new MyBitmapBlender(destCB);
PointF ptInPlane = new PointF();
int x1, y1;
double dab, dbc, dcd, dda;
int rectWidth = _destBounds.Width;
int rectHeight = _destBounds.Height;
Vector ab_vec = _AB;
Vector bc_vec = _BC;
Vector cd_vec = _CD;
Vector da_vec = _DA;
int rectLeft = _destBounds.Left;
int rectTop = _destBounds.Top;
unsafe
{
using (TempMemPtr.FromBmp(_srcBmp, out int *bufferPtr))
{
BufferReader4 reader = new BufferReader4(bufferPtr, _srcBmp.Width, _srcBmp.Height);
for (int y = 0; y < rectHeight; ++y)
{
for (int x = 0; x < rectWidth; ++x)
{
PointF srcPt = new PointF(x, y);
srcPt.Offset(rectLeft, rectTop);
if (!IsOnPlaneABCD(srcPt))
{
continue;
}
x1 = (int)ptInPlane.X;
y1 = (int)ptInPlane.Y;
reader.SetStartPixel(x1, y1);
destWriter.SetPixel(x, y, reader.Read1());
//-------------------------------------
dab = Math.Abs((MyVectorHelper.NewFromTwoPoints(_p0, srcPt)).CrossProduct(ab_vec));
dbc = Math.Abs((MyVectorHelper.NewFromTwoPoints(_p1, srcPt)).CrossProduct(bc_vec));
dcd = Math.Abs((MyVectorHelper.NewFromTwoPoints(_p2, srcPt)).CrossProduct(cd_vec));
dda = Math.Abs((MyVectorHelper.NewFromTwoPoints(_p3, srcPt)).CrossProduct(da_vec));
ptInPlane.X = (float)(_srcW * (dda / (dda + dbc)));
ptInPlane.Y = (float)(_srcH * (dab / (dab + dcd)));
}
}
return(destCB);
}
}
}
