This Corda® Server™ Administrator screen controls settings for image generation.
Note: These settings do not affect Highwire™ documents—Highwire documents are always PDF.
The default image format for all images that Corda Server generates. Corda Server returns images in this format unless the request specifies otherwise. Set the default format to JPEG, FLASH, or SVG*.
For information about the different image formats, see Image Formats in the Corda Builder™ User Guide. For more information on requesting images in formats other than the default format, see Changing the Image Format in the Corda 7 Developer Reference.
This option tells the Corda Server to serve PNG instead of JPEG images when possible. When this is enabled and a client requests a JPEG image, the Corda Server automatically checks to see if the client's browser supports PNG. If so, the Corda Server sends a PNG image.
If this option is enabled, choose one of the following PNG compression methods:
Default - This parameter offers the best compromise between the other two image compression settings.
Smallest - This parameter makes the file as small as possible, but image compression is extremely slow.
Fastest - This parameter compresses the image as quickly as possible, but the file size is significantly larger.
Though actual performance may vary from system to system, the latter two methods usually offer only a small increase in performance, while causing very slow image generation time and very large image sizes, respectively. Thus, Default is usually the best option.
By default, Corda Server uses Javascript* to provide interactivity with PNG and JPEG images. If you want to disable this behavior, check this option.
When Javascript is disabled, image maps are used to provide this functionality instead. However, interactivity is limited. For details, see Drilldown / Hover / Roll-over Data Label Problems with PNG or JPEG Images.
On certain systems, including all UNIX-compatible systems, you may need to instruct Corda Server to use a Java* AWT for best performance Depending on the configuration of the system, these settings may also enhance server performance, even on Microsoft* Windows* and Macintosh systems. More information about the Java AWT is available in Corda Server and the Java AWT.
Use Neither
Instructs the Corda Server not to use a Java AWT. Do not select this option on UNIX*/Linux-compatible systems.
Use Headless AWT for Image Rendering
Instructs the Corda Server to use Java 1.4's Headless AWT when generating images. Be sure that you are using Java 1.4 before you enable this option.
Use Pure Java AWT For Image Rendering
Instructs the Corda Server to use the Pure Java AWT (PJA) when generating images. By default, this setting is enabled on UNIX-compatible systems, but disabled otherwise.
PJA Setup - This option is only available when Use Pure Java AWT is selected. By default, this is set to Normal. Under certain circumstances, however, you achieve better results using the Class Override setting.