private static Matrix parseTransformSkewX(String pString) {
var start = SVGConstants.ATTRIBUTE_TRANSFORM_VALUE_SKEW_X.Length + 1;
var svgNumberParserFloatResult = pString.Substring(start, pString.IndexOf(')') - start).ParseFloats ();
SVGTransformParser.assertNumberParserResultNumberCountMinimum(svgNumberParserFloatResult, 1);
float angle = svgNumberParserFloatResult[0];
Matrix matrix = new Matrix();
matrix.PostSkew((float) Math.Tan(angle), 0);
return matrix;
}