public void Invoke(PdfContentStreamProcessor processor, PdfLiteral oper, List<PdfObject> operands)
{
float a = ((PdfNumber)operands[0]).FloatValue;
float b = ((PdfNumber)operands[1]).FloatValue;
float c = ((PdfNumber)operands[2]).FloatValue;
float d = ((PdfNumber)operands[3]).FloatValue;
float e = ((PdfNumber)operands[4]).FloatValue;
float f = ((PdfNumber)operands[5]).FloatValue;
Matrix matrix = new Matrix(a, b, c, d, e, f);
GraphicsState gs = processor.gsStack.Peek();
gs.ctm = matrix.Multiply(gs.ctm);
}