我正在使用Windows CE 6.0在ARM平台上开发设备。其中一个目标是为用户提供直接从设备打印的可能性(而不仅仅是文本!)。这意味着Windows必须处理各种类型的打印机。我怎样才能实现这样的功能?
我的猜测是: - PCL打印(你还能买到PCL打印机吗?) - 网络打印(怎么做 - 任何例子?)
谢谢!
答案 0 :(得分:3)
在Windows CE 6.0下可以打印。 “\ WINCE600 \ PUBLIC \ COMMON \ OAK \ DRIVERS \ PRINTER \ PCL”中有一个PCL驱动程序示例。要将它包含在OS设计中,请在Configuraiton Properties中将SYSGEN_PRINTING,SYSGEN_PCL和SYSGEN_USB_PRINTER设置为1 - >环境。它将导致编译示例并将pcl.dll添加到OS Design。还将添加USB打印机类驱动程序。
以上操作让我们以ASCII代码打印文本:
// initialize printing
//hPrinter = CreateFile(L"LPT1:", GENERIC_READ | GENERIC_WRITE, 0, NULL, OPEN_EXISTING, 0, NULL);
//if (hPrinter == NULL) RETAILMSG(TRUE, (L"Error in OnClick5 (GUI): CreateFile() returned NULL"));
// print text WORKS
//WriteFile(hPrinter, szText, sizeof(szText), &cBytes, NULL);
// close printer port
//CloseHandle(hPrinter);
但是要打印例如BMP文件,我们需要真正使用PCL驱动程序(请查看以下代码)。问题是,我无法摆脱一个错误:StartDoc()总是返回“不支持网络请求”。启动打印作业的正确方法是什么?
LPVOID lpMsgBuf = NULL;
HDC hdc = NULL;
DOCINFO di;
DEVMODE dm;
// initialize DEVMODE struct
memset(&dm, 0, sizeof(DEVMODE));
wcscpy(dm.dmDeviceName, L"Hewlett-Packard LaserJet P3010 Series");
dm.dmSize = sizeof(DEVMODE);
dm.dmPaperSize = DMPAPER_A4;
dm.dmPrintQuality = DMRES_DRAFT;
dm.dmFields = DM_PAPERSIZE | DM_PRINTQUALITY;
//PAGESETUPDLG psd;
//memset(&psd, 0, sizeof(psd));
//psd.hwndOwner = NULL;
//psd.hDevMode = NULL;
//psd.hDevNames = NULL;
//psd.Flags = PSD_RETURNDEFAULT;
//psd.lStructSize = sizeof(psd);
//PageSetupDlg(&psd);
//RETAILMSG(TRUE, (L"GUI: PageSetupDlg() result 0x%x", CommDlgExtendedError()));
//if (psd.hDevMode == NULL) return -1;
//DEVMODE* lpdm = (DEVMODE*)psd.hDevMode;
DEVMODE* lpdm = &dm;
// initialize device context
hdc = CreateDC(L"pcl.dll", L"Printer", L"LPT1:", lpdm);
if (hdc == NULL) {
RETAILMSG(TRUE, (L"GUI: CreateDC() error 0x%x", GetLastError()));
return -1;
}
// register abort procedure
SetAbortProc(hdc, AbortProc);
// initialize DOCINFO struct
memset(&di, 0, sizeof(DOCINFO));
di.cbSize = sizeof(DOCINFO);
di.lpszDocName = L"logo.bmp";
di.lpszOutput = NULL;
di.lpszDatatype = 0;
di.fwType = 0;
// print file
if (StartDoc(hdc, &di) <= 0) {
RETAILMSG(TRUE, (L"Error in OnClick5 (GUI): StartDoc() returned non-positive value"));
FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
NULL, GetLastError(), 0, (LPTSTR)&lpMsgBuf, 0, NULL);
RETAILMSG(TRUE, ((LPWSTR)lpMsgBuf));
LocalFree( lpMsgBuf );
DeleteDC(hdc);
return -1;
}