XPSSaveAsImage

PSSaveAsImage function

Converts the Postscript to image.

function AsposeXPSSaveAsImage(
    fileBlob, 
    fileName, 
    imageFormat, 
    supressErrors
)

Parameter	Type	Description
fileBlob	Blob object	Content of source font for convert.
fileName	string	File name.
imageFormat	ImageFormat	image format to convert into.
supressErrors	bool	Specifies whether errors must be suppressed or not.

Return Value

JSON object

Field	Description
errorCode	code error (0 no error)
errorText	text error ("" no error)
fileNameResult	result file name

Examples

  var fXpsAsPng = function (e) {
    const file_reader = new FileReader();
    file_reader.onload = (event) => {
      const json = XPSSaveAsImage(event.target.result, e.target.files[0].name, Module.ImageFormat.Png, true);
      if (json.errorCode == 0) {
        document.getElementById('output').textContent = "Files(pages) count: " + json.filesCount.toString();
        for (let fileIndex = 0; fileIndex < json.filesCount; fileIndex++) DownloadFile(json.filesNameResult[fileIndex], "image/png");
      }
      else 
        document.getElementById('output').textContent = json.errorText;
    }
    file_reader.readAsArrayBuffer(e.target.files[0]);
  }

Web Worker example:

  /*Create Web Worker*/
  const AsposePageWebWorker = new Worker("AsposePageforJS.js");
  AsposePageWebWorker.onerror = evt => console.log(`Error from Web Worker: ${evt.message}`);
  AsposePageWebWorker.onmessage = evt => document.getElementById('output').textContent = 
    (evt.data == 'ready') ? 'library loaded!' :
      (evt.data.json.errorCode == 0) ? `Result:\n${DownloadFile(evt.data.json.fileNameResult, "application/image", evt.data.params[0])}` : `Error: ${evt.data.json.errorText}`;

  /*Event handler*/
  const fXpsAsPng = e => {
    const file_reader = new FileReader();
    file_reader.onload = event => {
      /*Convert a XPS to PNG and save - Ask Web Worker*/
      AsposePageWebWorker.postMessage({ "operation": 'XPSSaveAsImage', "params": [event.target.result, e.target.files[0].name, 'Module.ImageFormat.Png'] }, [event.target.result]);
    };
    file_reader.readAsArrayBuffer(e.target.files[0]);
  };

  /*Make a link to download the result file*/
  const DownloadFile = function (filename, mime, content) {
      mime = mime || "application/octet-stream";
      var link = document.createElement("a"); 
      link.href = URL.createObjectURL(new Blob([content], {type: mime}));
      link.download = filename;
      link.textContent = filename;
      link.title = "Click here to download the file";
      document.getElementById('fileDownload').appendChild(link);
      document.getElementById('fileDownload').appendChild(document.createElement("br"));
  }

See Also

• function XPSSaveAsPdf
• enum ImageFormat