使用 VC++ 将 Postscript 文档发送到打印机 [英] Send Postscript Document to Printer using VC++

问题描述

我有一个 postscript 文件.如何使用 Visual C++ 将其发送到打印机?这看起来应该很简单.

I have a postscript file. How can I send it to a printer using Visual C++? This seems like it should be simple.

推荐答案

如果打印机直接支持 PostScript，您可以像这样假脱机原始打印作业:

If the printer supports PostScript directly you can spool a raw print jobs like this:

HANDLE ph;

OpenPrinter(&ph, "Printer Name", NULL);

di1.pDatatype = IsV4Driver("Printer Name") ? "XPS_PASS" : "RAW"; 
di1.pDocName = "Raw print document";
di1.pOutputFile = NULL;

StartDocPrinter(ph, 1, (LPBYTE)&di1);

StartPagePrinter(ph);

WritePrinter(ph, buffer, dwRead, &dwWritten);

EndPagePrinter(ph);

EndDocPrinter(ph)

重复 WritePrinter，直到您完成整个文件的后台处理.

Repeat the WritePrinter until you have spooled the whole file.

IsV4Driver() 检查版本 4 驱动程序，这在 Windows 8 和 Server 2012 中是必需的:

IsV4Driver() Checks for version 4 drivers, this is necessary in Windows 8 and Server 2012:

bool IsV4Driver(wchar_t* printerName)
{
    HANDLE handle;
    PRINTER_DEFAULTS defaults;

    defaults.DesiredAccess = PRINTER_ACCESS_USE;
    defaults.pDatatype = L"RAW";
    defaults.pDevMode = NULL;

    if (::OpenPrinter(printerName, &handle, &defaults) == 0)
    {
        return false;
    }

    DWORD version = GetVersion(handle);

    ClosePrinter(handle);

    return version == 4;
}

DWORD GetVersion(HANDLE handle)
{
    DWORD needed;

    GetPrinterDriver(handle, NULL, 2, NULL, 0, &needed);

    std::vector<char> buffer(needed);

    return ((DRIVER_INFO_2*) &buffer[0])->cVersion;
}

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