Convert PDF Documents to RTF Documents

val cPDFConvert = CPDFConverterRtf(context, uri, "")

val params = CPDFConvertRtfOptions().apply {
     isContainImages = true
     isContainAnnotations = false
}

val result: ConvertError = cPDFConvert.convert(outputDir, outputFilenameNoSuffix, params, pageArrays, 
onHandle = onHandleCal, 
onProgress = onProgressCal, 
onPost = onPostCal)