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hfeeki
V2EX  ›  程序员

请教一下,谁知道怎样编程控制打印机打印照片? 用 vc, python 为佳,多谢

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  •   hfeeki · 2014-06-10 15:41:26 +08:00 · 4492 次点击
    这是一个创建于 3040 天前的主题,其中的信息可能已经有所发展或是发生改变。
    请教一下,谁知道怎样编程控制打印机打印照片? 用vc, python为佳,多谢
    操作系统是windows
    8 条回复    2014-06-11 13:22:36 +08:00
    hfeeki
        1
    hfeeki  
    OP
       2014-06-10 15:43:49 +08:00
    假设只提供一个图片文件的全路径名,怎样开发一个把图片打印出来的函数?
    mhycy
        2
    mhycy  
       2014-06-10 15:49:10 +08:00
    貌似要调用打印机驱动。。。具体非常复杂,困难,麻烦。。。。
    hfeeki
        3
    hfeeki  
    OP
       2014-06-10 16:55:40 +08:00
    貌似不是很负责、困难、麻烦。。。 我已经知道怎样做了
    librehat
        4
    librehat  
       2014-06-10 18:15:19 +08:00
    用Qt吧,有现成函数库可以打印。QPrinter
    Comdex
        5
    Comdex  
       2014-06-10 18:18:53 +08:00
    @hfeeki 请问一下楼主能分享一下吗
    loading
        6
    loading  
       2014-06-10 18:25:57 +08:00 via iPhone
    LZ 没品
    hfeeki
        7
    hfeeki  
    OP
       2014-06-10 19:24:00 +08:00
    import win32print
    import win32ui
    from PIL import Image, ImageWin

    #
    # Constants for GetDeviceCaps
    #
    #
    # HORZRES / VERTRES = printable area
    #
    HORZRES = 8
    VERTRES = 10
    #
    # LOGPIXELS = dots per inch
    #
    LOGPIXELSX = 88
    LOGPIXELSY = 90
    #
    # PHYSICALWIDTH/HEIGHT = total area
    #
    PHYSICALWIDTH = 110
    PHYSICALHEIGHT = 111
    #
    # PHYSICALOFFSETX/Y = left / top margin
    #
    PHYSICALOFFSETX = 112
    PHYSICALOFFSETY = 113

    printer_name = win32print.GetDefaultPrinter ()
    file_name = "test.jpg"

    #
    # You can only write a Device-independent bitmap
    # directly to a Windows device context; therefore
    # we need (for ease) to use the Python Imaging
    # Library to manipulate the image.
    #
    # Create a device context from a named printer
    # and assess the printable size of the paper.
    #
    hDC = win32ui.CreateDC ()
    hDC.CreatePrinterDC (printer_name)
    printable_area = hDC.GetDeviceCaps (HORZRES), hDC.GetDeviceCaps (VERTRES)
    printer_size = hDC.GetDeviceCaps (PHYSICALWIDTH), hDC.GetDeviceCaps (PHYSICALHEIGHT)
    printer_margins = hDC.GetDeviceCaps (PHYSICALOFFSETX), hDC.GetDeviceCaps (PHYSICALOFFSETY)

    #
    # Open the image, rotate it if it's wider than
    # it is high, and work out how much to multiply
    # each pixel by to get it as big as possible on
    # the page without distorting.
    #
    bmp = Image.open (file_name)
    if bmp.size[0] > bmp.size[1]:
    bmp = bmp.rotate (90)

    ratios = [1.0 * printable_area[0] / bmp.size[0], 1.0 * printable_area[1] / bmp.size[1]]
    scale = min (ratios)

    #
    # Start the print job, and draw the bitmap to
    # the printer device at the scaled size.
    #
    hDC.StartDoc (file_name)
    hDC.StartPage ()

    dib = ImageWin.Dib (bmp)
    scaled_width, scaled_height = [int (scale * i) for i in bmp.size]
    x1 = int ((printer_size[0] - scaled_width) / 2)
    y1 = int ((printer_size[1] - scaled_height) / 2)
    x2 = x1 + scaled_width
    y2 = y1 + scaled_height
    dib.draw (hDC.GetHandleOutput (), (x1, y1, x2, y2))

    hDC.EndPage ()
    hDC.EndDoc ()
    hDC.DeleteDC ()
    tywtyw2002
        8
    tywtyw2002  
       2014-06-11 13:22:36 +08:00 via iPhone
    pdflatex。 然后用cups。
    python生成一个latex脚本,运行下pdflatex编译,剩下的cmd call lpr去打印。
    没想折腾cups api。
    linux上面没问题。

    以前做过一键重排版ppt,然后打印。
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