Printing images through Python

[Tim Golden]

> -----Original Message-----
> From: Tim Golden 
> Sent: 03 October 2003 09:49
> To: 'Kevin'
> Cc: python-list at python.org
> Subject: RE: Printing images through Python
> 
> 
> > From: Kevin [mailto:other at cazabon.com]
> > Does ANYONE have Python code to print PIL images?
> 
> It just so happens that I've been going through the same bit 
> of grief recently. Depending on just how much control you 
> want, I advocate two approaches, with several others possible 
> if I had more time to explore the, frankly arcane, 
> possibilities offered by the Win32 SDK:
> 
> 1) Use ReportLab's PDF generator to embed the image. Get the 
> ReportLab docs (http://www.reportlab.com/docs/userguide.pdf) 
> and search for InlineImage. If you need a code example I can 
> give you one, but it's pretty straightforward. This has the 
> advantage that you can then call whatever Acrobat viewer you 
> want in print mode (eg acrord32.exe /p) to give the user the 
> chance to select the printer, paper size etc. You can even 
> get Acrobat to print using defaults without asking the user 
> anything (can't remember the switch).
> 
> 2) If you want quick-and-dirty, make use of the fact that 
> Device-Independent Bitmaps are *much* easier to work with in 
> Windows than the convention HBITMAP variety. So (with minimal 
> comments):
> 
> <code>
> import win32ui
> import win32gui
> import win32con
> from PIL import Image, ImageWin
> 
> #
> # Constants for GetDeviceCaps 
> #
> HORZRES = 8
> VERTRES = 10
> 
> #
> # Find the printer resolution to scale to
> #
> hDC = win32ui.CreateDC ()
> hDC.CreatePrinterDC () # can optionally put a printer name in here
> printer_resolution = hDC.GetDeviceCaps (HORZRES), 
> hDC.GetDeviceCaps (VERTRES)
> print "printer resolution =", printer_resolution
> 
> #
> # Open the bitmap and rotate because we know it's
> #  really landscape
> #
> bmp = Image.open ("screen.bmp")
> print "original bitmap size =", bmp.size
> bmp = bmp.rotate (90)
> print "rotated bitmap size =", bmp.size
> 
> #
> # Resize the image to fit the page but not to overflow
> #
> ratios = [1.0 * printer_resolution[0] / bmp.size[0], 1.0 * 
> printer_resolution[1] / bmp.size[1]]
> print "ratios =", ratios
> scale = min (ratios)
> print "scale =", scale
> 
> #
> # Create the printer document and send the page
> #
> hDC.StartDoc ("Test")
> hDC.StartPage ()
> 
> dib = ImageWin.Dib (bmp)
> scaled_size = [scale * i for i in bmp.size]
> print "scaled bitmap size =", scaled_size
> dib.draw (hDC.GetHandleOutput (), [0, 0] + scaled_size)
> 
> hDC.EndPage ()
> hDC.EndDoc ()
> </code>
> 
> HTH. 
> TJG
> 

Also meant to suggest looking on Roger Burnham's site for a fuller example:

http://starship.python.net/crew/roger/

TJG

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