ImageGear for C and C++ on Linux v20.0 - Updated
API Reference Guide > PDF Component API Reference > PDF Component Objects Reference > General Objects > HIG_PDF_LAYER > IG_PDF_layer_get_usage_info

This function gets usage information from a layer object.


Copy Code
AT_ERRCOUNT ACCUAPI IG_PDF_layer_get_usage_info(
        HIG_PDF_LAYER hLayer,
        HIG_PDF_ATOM hUsageKey,
        LPHIG_PDF_BASOBJ lphUsageInfo


Name Type Description
hLayer HIG_PDF_LAYER Layer object whose usage information is obtained.
hUsageKey HIG_PDF_ATOM The usage key in the usage dictionary entry. Possible key values are:
  • CreatorInfo
  • Language
  • Export
  • Zoom
  • Print
  • View
  • User
  • PageElement
lphUsageInfo LPHIG_PDF_BASOBJ The usage information associated with the given key in the Usage dictionary for the layer, or a NULL if the operation fails (because the layer is malformed or has no dictionary, or because the dictionary has no entry corresponding to the given key).

Return Value:

Error count.

Supported Raster Image Formats:

This function does not process image pixels.


A Usage dictionary entry provides more specific intended usage information than an intent entry.

Is this page helpful?
Yes No
Thanks for your feedback.