Convert PDF Documents to Image Documents
val cPDFConvert = CPDFConverterImg(context, uri, "")
val params = CPDFConvertImgOptions().apply {
imageDpi = 900
imgType = ImgType.JPEG
isContainAnnotations = true
}
val result: ConvertError = cPDFConvert.convert(outputDir, outputFilenameNoSuffix, params, pageArrays,
onHandle = onHandleCal,
onProgress = onProgressCal,
onPost = onPostCal)