เพิ่มรูปแสตมป์ PDF ผ่าน JavaScript via C++

    var ffileStamp = function (e) {
        const file_reader = new FileReader();
        /*set the stamp filename*/
        fileStamp = e.target.files[0].name;
        file_reader.onload = (event) => {
        /*prepare(save) the stamp file from BLOB*/
        AsposePdfPrepare(event.target.result, fileStamp);
        };
        file_reader.readAsArrayBuffer(e.target.files[0]);
    };

    var ffileAddStamp = function (e) {
        const file_reader = new FileReader();
        file_reader.onload = (event) => {
        /*insert the stamp file to a PDF-file and save the "ResultStamp.pdf"*/
        const json = AsposePdfAddStamp(event.target.result, e.target.files[0].name, fileStamp, 0, 5, 5, 40, 40, Module.Rotation.on270, 0.5, "ResultStamp.pdf");
        if (json.errorCode == 0) document.getElementById('output').textContent = json.fileNameResult;
        else document.getElementById('output').textContent = json.errorText;
        /*make a link to download the result file*/
        DownloadFile(json.fileNameResult, "application/pdf");
        };
        file_reader.readAsArrayBuffer(e.target.files[0]);
    };