c1.add(COSFloat.get("0.5"));
fdict.setItem(COSName.DOMAIN, domain);
fdict.setItem(COSName.C0, c0);
fdict.setItem(COSName.C1, c1);
fdict.setInt(COSName.N, 1);
PDFunctionType2 func = new PDFunctionType2(fdict);
// axial shading with attributes
PDShadingType2 axialShading = new PDShadingType2(new COSDictionary());
axialShading.setColorSpace(PDDeviceRGB.INSTANCE);
axialShading.setShadingType(PDShading.SHADING_TYPE2);