Tech Tip: Setting the Dots Per Inch (DPI) in VirtualViewer Java Content Server

Snowbound Software’s VirtualViewer Java Content Server includes parameters that allow you to define the dots per inch (DPI). By setting the DPI, you can control the performance or quality for displaying images. To improve performance, set the DPI to a lower value. To improve the quality of how the image displays, set the DPI to a higher value. For best performance, Snowbound Software recommends setting the default DPI value at 200.

To set the DPI value, open the web.xml file and set the value as shown in the example below. The web.xml file is located in the WEB-INF directory.

<param name="pclDPI" value="200">

You can set the DPI value for the servlet parameters shown in the table below in the web.xml file:

Name	Default Value	Description
iocaDPI	200	The Dots Per Inch to use when decompressing IOCA pages.
modcaDPI	200	The Dots Per Inch to use when decompressing MO:DCA pages.
pclDPI	200	The Dots Per Inch to use when decompressing PCL pages.
pdfDPI	200	The Dots Per Inch to use when decompressing PDF pages.
pptDPI	200	The Dots Per Inch to use when decompressing PPT pages.
wordDPI	200	The Dots Per Inch to use when decompressing Word pages.
xlsDPI	200	The Dots Per Inch to use when decompressing XLS pages.

For a list of all of the servlet parameters available in VirtualViewer Java Content Server, see Appendix A: Servlet Tags for web.xml in the VirtualViewer Java Content Server Administrator’s Guide.