PDRSTORE overview

PDRSTORE component is used to load printer driver information files and to create printer drivers. In a secure platform environment, the PDR information files are available in the \resource\printers folder.

The component has the following key concepts:

Banding

Banding is the breaking up of a whole page into smaller bands, or strips, so that less memory or disk space is required to render the image.

The PDRSTORE component has the following internal and external dependency relationships with other components.

Internal relationships

External relationships

Components must statically link to pdrstr.dll to access the PDRSTORE functionality.

Class Name Description CCommPrinterPort Comms-based printer port base class. CPdrControl Generic concrete printer control class. CPdrDevice Generic concrete printer device class. CMetafilePlayback Utility class for converting the stream of graphics commands generated by a CMetafileDevice object to a metafile for transmitting to a PC. The metafile is then printed by a PC-based connection application to any printer connected to the PC. CBandedDevice CGraphicsDevice derived class for breaking drawing into bands. This class prints using bitmaps and not a printer control language, because the high resolution of printers prevents a bitmap representing a whole page being created due to memory constraints.

The following are the typical use cases for this API:

Load printer driver information files

.pdr files contain printer driver access information. This access information can be used by applications to build printer driver lists. In a secure platform environment, the PDR information files are available in the \resource\printers folder. For more details, see Loading printer driver information files

Create printer drivers

.pdr files can be used to load and create appropriate printer drivers for a printer.

Printer driver plugins developed for unsecure Symbian OS versions will not work with the secure GDI & PDRSTORE. Therefore, they must be migrated to the generic ECOM plug-in framework. For more details, see Creating a printer driver

• How to load printer driver information files and create a printer driver