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egradman/print_win32_vector.py

Created August 28, 2012 22:53
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print_win32_vector.py which fixes scale factor for ULS M300 et al.
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print_win32_vector.py
#!/usr/bin/env python
'''
print_win32_vector.py
This extension will generate vector graphics printout, specifically for Windows GDI32.
Copyright (C) 2012 Alvin Penner, penner@vaxxine.com
This is a modified version of the file dxf_outlines.py by Aaron Spike, aaron@ekips.org
It will write only to the default printer.
The printing preferences dialog will be called.
In order to ensure a pure vector output, use a linewidth < 1 printer pixel
- see http://www.lessanvaezi.com/changing-printer-settings-using-the-windows-api/
- get GdiPrintSample.zip at http://archive.msdn.microsoft.com/WindowsPrintSample
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
'''
from ctypes import *
import inkex, simplestyle, simpletransform, cubicsuperpath
import gettext
_ = gettext.gettext
if inkex.sys.platform != "win32":
exit(_("sorry, this will run only on Windows, exiting..."))
myspool = WinDLL("winspool.drv")
mygdi = WinDLL("gdi32.dll")
LOGBRUSH = c_long*3
DM_IN_PROMPT = 4 # call printer property sheet
DM_OUT_BUFFER = 2 # write to DEVMODE structure
class MyEffect(inkex.Effect):
def __init__(self):
inkex.Effect.__init__(self)
self.visibleLayers = True # print only visible layers
def process_shape(self, node, mat):
rgb = (0,0,0) # stroke color
fillcolor = None # fill color
stroke = 1 # pen width in printer pixels
# Very NB : If the pen width is greater than 1 then the output will Not be a vector output !
style = node.get('style')
if style:
style = simplestyle.parseStyle(style)
if style.has_key('stroke'):
if style['stroke'] and style['stroke'] != 'none' and style['stroke'][0:3] != 'url':
rgb = simplestyle.parseColor(style['stroke'])
if style.has_key('stroke-width'):
stroke = float(style['stroke-width'].replace('px', '').replace('pt', ''))
stroke = int(stroke*self.scale)
if style.has_key('fill'):
if style['fill'] and style['fill'] != 'none' and style['fill'][0:3] != 'url':
fill = simplestyle.parseColor(style['fill'])
fillcolor = fill[0] + 256*fill[1] + 256*256*fill[2]
color = rgb[0] + 256*rgb[1] + 256*256*rgb[2]
if node.tag == inkex.addNS('path','svg'):
d = node.get('d')
if not d:
return
p = cubicsuperpath.parsePath(d)
elif node.tag == inkex.addNS('rect','svg'):
x = float(node.get('x'))
y = float(node.get('y'))
width = float(node.get('width'))
height = float(node.get('height'))
p = [[[x, y],[x, y],[x, y]]]
p.append([[x + width, y],[x + width, y],[x + width, y]])
p.append([[x + width, y + height],[x + width, y + height],[x + width, y + height]])
p.append([[x, y + height],[x, y + height],[x, y + height]])
p.append([[x, y],[x, y],[x, y]])
p = [p]
else:
return
trans = node.get('transform')
if trans:
mat = simpletransform.composeTransform(mat, simpletransform.parseTransform(trans))
simpletransform.applyTransformToPath(mat, p)
hPen = mygdi.CreatePen(0, stroke, color)
mygdi.SelectObject(self.hDC, hPen)
self.emit_path(p)
if fillcolor is not None:
brush = LOGBRUSH(0, fillcolor, 0)
hBrush = mygdi.CreateBrushIndirect(addressof(brush))
mygdi.SelectObject(self.hDC, hBrush)
mygdi.BeginPath(self.hDC)
self.emit_path(p)
mygdi.EndPath(self.hDC)
mygdi.FillPath(self.hDC)
return
def emit_path(self, p):
for sub in p:
mygdi.MoveToEx(self.hDC, int(sub[0][1][0]), int(sub[0][1][1]), None)
POINTS = c_long*(6*(len(sub)-1))
points = POINTS()
for i in range(len(sub)-1):
points[6*i] = int(sub[i][2][0])
points[6*i + 1] = int(sub[i][2][1])
points[6*i + 2] = int(sub[i + 1][0][0])
points[6*i + 3] = int(sub[i + 1][0][1])
points[6*i + 4] = int(sub[i + 1][1][0])
points[6*i + 5] = int(sub[i + 1][1][1])
mygdi.PolyBezierTo(self.hDC, addressof(points), 3*(len(sub)-1))
return
def process_clone(self, node):
trans = node.get('transform')
x = node.get('x')
y = node.get('y')
mat = [[1.0, 0.0, 0.0], [0.0, 1.0, 0.0]]
if trans:
mat = simpletransform.composeTransform(mat, simpletransform.parseTransform(trans))
if x:
mat = simpletransform.composeTransform(mat, [[1.0, 0.0, float(x)], [0.0, 1.0, 0.0]])
if y:
mat = simpletransform.composeTransform(mat, [[1.0, 0.0, 0.0], [0.0, 1.0, float(y)]])
# push transform
if trans or x or y:
self.groupmat.append(simpletransform.composeTransform(self.groupmat[-1], mat))
# get referenced node
refid = node.get(inkex.addNS('href','xlink'))
refnode = self.getElementById(refid[1:])
if refnode is not None:
if refnode.tag == inkex.addNS('g','svg'):
self.process_group(refnode)
elif refnode.tag == inkex.addNS('use', 'svg'):
self.process_clone(refnode)
else:
self.process_shape(refnode, self.groupmat[-1])
# pop transform
if trans or x or y:
self.groupmat.pop()
def process_group(self, group):
if group.get(inkex.addNS('groupmode', 'inkscape')) == 'layer':
style = group.get('style')
if style:
style = simplestyle.parseStyle(style)
if style.has_key('display'):
if style['display'] == 'none' and self.visibleLayers:
return
trans = group.get('transform')
if trans:
self.groupmat.append(simpletransform.composeTransform(self.groupmat[-1], simpletransform.parseTransform(trans)))
for node in group:
if node.tag == inkex.addNS('g','svg'):
self.process_group(node)
elif node.tag == inkex.addNS('use', 'svg'):
self.process_clone(node)
else:
self.process_shape(node, self.groupmat[-1])
if trans:
self.groupmat.pop()
def effect(self):
pcchBuffer = c_long()
myspool.GetDefaultPrinterA(None, byref(pcchBuffer)) # get length of printer name
pname = create_string_buffer(pcchBuffer.value)
myspool.GetDefaultPrinterA(pname, byref(pcchBuffer)) # get printer name
hPrinter = c_long()
if myspool.OpenPrinterA(pname.value, byref(hPrinter), None) == 0:
exit(_("Failed to open default printer"))
# get printer properties dialog
pcchBuffer = myspool.DocumentPropertiesA(0, hPrinter, pname, None, None, 0)
pDevMode = create_string_buffer(pcchBuffer + 100) # allocate extra just in case
pcchBuffer = myspool.DocumentPropertiesA(0, hPrinter, pname, byref(pDevMode), None, DM_IN_PROMPT + DM_OUT_BUFFER)
myspool.ClosePrinter(hPrinter)
if pcchBuffer != 1: # user clicked Cancel
exit()
# initiallize print document
docname = self.document.getroot().xpath('@sodipodi:docname', namespaces=inkex.NSS)
if not docname:
docname = ['New document 1']
lpszDocName = create_string_buffer('Inkscape ' + docname[0].split('\\')[-1])
DOCINFO = c_long*5
docInfo = DOCINFO(20, addressof(lpszDocName), 0, 0, 0)
self.hDC = mygdi.CreateDCA(None, pname, None, byref(pDevMode))
if mygdi.StartDocA(self.hDC, byref(docInfo)) < 0:
exit() # user clicked Cancel
self.scale = (ord(pDevMode[58]) + 256.0*ord(pDevMode[59]))/90 # use PrintQuality from DEVMODE
self.groupmat = [[[self.scale, 0.0, 0.0], [0.0, self.scale, 0.0]]]
doc = self.document.getroot()
scalemat = simpletransform.composeTransform(
self.groupmat[-1],
[[1.0/1.2, 0, 0], [0, 1.0/1.2, 0]]
)
self.groupmat.append(scalemat)
self.process_group(doc)
mygdi.EndDoc(self.hDC)
if __name__ == '__main__':
e = MyEffect()
e.affect()
# vim: expandtab shiftwidth=4 tabstop=8 softtabstop=4 fileencoding=utf-8 textwidth=99
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