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| Windows CE Driver |
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| Description |
| Table 1 • Driver Functions | |
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Function |
| Description |
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DrvGetModes |
| Lists the modes supported by a specified device. |
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DrvStartDoc |
| Called by the GDI to start a print job. |
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DrvStartPage |
| Called by the GDI to start printing the next page of a print |
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| job. |
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GetPrinterInfo |
| Obtains information about printers, such as the name of |
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| the printer or whether the printer can print in color. |
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PrinterClose |
| Closes a printer handle previously opened by a call to the |
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| PrinterOpen function. |
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PrinterOpen |
| Opens a specified printer port and returns a handle to the |
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| printer. |
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PrinterSend |
| Sends a block of data to a printer. |
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ReportPrinterStatus |
| Returns the status of a printer or printing operation that is |
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| in progress. |
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GetPrinterStatus |
| Returns a specific TTP 2030 status. |
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Port Monitor
The port monitor for the TTP 2030 is called TTPPort.DLL. Printing is supported over universal serial bus (USB) port only. The printing architecture provides application programming interfaces (APIs) that are exposed by the Graphics, Windowing, and Events Subsystem (GWES) to communicate with the printer driver. The printer driver communicates with the port driver that sends the print data over the supported bus. Therefore, the printer driver is independent of the bus and the corresponding bus driver.
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Print Spooling
No separate printer spooler component exists in Windows CE, unlike the desktop versions of the Windows OS. With Windows CE, spooling or background printing is implemented in the printer driver itself. However, because print spooling typically consumes a lot of memory, limited memory might be a problem. A practical print spooler usually has to implement a complicated compression scheme to store spooled documents before printing.
Status Monitoring
In order to allow applications to get status from the printer, there are two functions implemented:
•ReportPrinterStatus – the default function described in the MSDN documentation.
•GetPrinterStatus – the function that returns the actual printer status (described below).
4/14/2013 | TTP 2030™ Windows CE Software Integrator Guide |
