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#!/usr/bin/env python
'''
dxf_input.py - input a DXF file >= (AutoCAD Release 13 == AC1012)
Copyright (C) 2008 Alvin Penner, penner@vaxxine.com
- thanks to Aaron Spike for inkex.py and simplestyle.py
- without which this would not have been possible
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
'''
import inkex, simplestyle, math
from StringIO import StringIO
def export_MTEXT():
# mandatory group codes : (1, 10, 20) (text, x, y)
if vals[groups['1']] and vals[groups['10']] and vals[groups['20']]:
x = vals[groups['10']][0]
y = vals[groups['20']][0]
# optional group codes : (40, 50) (text height mm, text angle)
size = 12 # default fontsize in px
if vals[groups['40']]:
size = scale*vals[groups['40']][0]
attribs = {'x': '%f' % x, 'y': '%f' % y, 'style': 'font-size: %dpx; fill: %s' % (size, color)}
angle = 0 # default angle in degrees
if vals[groups['50']]:
angle = vals[groups['50']][0]
attribs.update({'transform': 'rotate (%f %f %f)' % (-angle, x, y)})
attribs.update({'sodipodi:linespacing': '125%'})
node = inkex.etree.SubElement(layer, 'text', attribs)
text = vals[groups['1']][0]
found = text.find('\P') # new line
while found > -1:
tspan = inkex.etree.SubElement(node , 'tspan', {'sodipodi:role': 'line'})
tspan.text = text[:found]
text = text[(found+2):]
found = text.find('\P')
tspan = inkex.etree.SubElement(node , 'tspan', {'sodipodi:role': 'line'})
tspan.text = text
def export_POINT():
# mandatory group codes : (10, 20) (x, y)
if vals[groups['10']] and vals[groups['20']]:
generate_ellipse(vals[groups['10']][0], vals[groups['20']][0], w/2, 0.0, 1.0, 0.0, 0.0)
def export_LINE():
# mandatory group codes : (10, 11, 20, 21) (x1, x2, y1, y2)
if vals[groups['10']] and vals[groups['11']] and vals[groups['20']] and vals[groups['21']]:
path = 'M %f,%f %f,%f' % (vals[groups['10']][0], vals[groups['20']][0], scale*(vals[groups['11']][0] - xmin), - scale*(vals[groups['21']][0] - ymax))
attribs = {'d': path, 'style': style}
inkex.etree.SubElement(layer, 'path', attribs)
def export_SPLINE():
# mandatory group codes : (10, 20, 70) (x, y, flags)
if vals[groups['10']] and vals[groups['20']] and vals[groups['70']]:
if not (vals[groups['70']][0] & 3) and len(vals[groups['10']]) == 4 and len(vals[groups['20']]) == 4:
path = 'M %f,%f C %f,%f %f,%f %f,%f' % (vals[groups['10']][0], vals[groups['20']][0], vals[groups['10']][1], vals[groups['20']][1], vals[groups['10']][2], vals[groups['20']][2], vals[groups['10']][3], vals[groups['20']][3])
attribs = {'d': path, 'style': style}
inkex.etree.SubElement(layer, 'path', attribs)
if not (vals[groups['70']][0] & 3) and len(vals[groups['10']]) == 3 and len(vals[groups['20']]) == 3:
path = 'M %f,%f Q %f,%f %f,%f' % (vals[groups['10']][0], vals[groups['20']][0], vals[groups['10']][1], vals[groups['20']][1], vals[groups['10']][2], vals[groups['20']][2])
attribs = {'d': path, 'style': style}
inkex.etree.SubElement(layer, 'path', attribs)
def export_CIRCLE():
# mandatory group codes : (10, 20, 40) (x, y, radius)
if vals[groups['10']] and vals[groups['20']] and vals[groups['40']]:
generate_ellipse(vals[groups['10']][0], vals[groups['20']][0], scale*vals[groups['40']][0], 0.0, 1.0, 0.0, 0.0)
def export_ARC():
# mandatory group codes : (10, 20, 40, 50, 51) (x, y, radius, angle1, angle2)
if vals[groups['10']] and vals[groups['20']] and vals[groups['40']] and vals[groups['50']] and vals[groups['51']]:
generate_ellipse(vals[groups['10']][0], vals[groups['20']][0], scale*vals[groups['40']][0], 0.0, 1.0, vals[groups['50']][0]*math.pi/180.0, vals[groups['51']][0]*math.pi/180.0)
def export_ELLIPSE():
# mandatory group codes : (10, 11, 20, 21, 40, 41, 42) (xc, xm, yc, ym, width ratio, angle1, angle2)
if vals[groups['10']] and vals[groups['11']] and vals[groups['20']] and vals[groups['21']] and vals[groups['40']] and vals[groups['41']] and vals[groups['42']]:
generate_ellipse(vals[groups['10']][0], vals[groups['20']][0], scale*vals[groups['11']][0], scale*vals[groups['21']][0], vals[groups['40']][0], vals[groups['41']][0], vals[groups['42']][0])
def export_LEADER():
# mandatory group codes : (10, 20) (x, y)
if vals[groups['10']] and vals[groups['20']]:
if len(vals[groups['10']]) > 1 and len(vals[groups['20']]) == len(vals[groups['10']]):
path = 'M %f,%f' % (vals[groups['10']][0], vals[groups['20']][0])
for i in range (1, len(vals[groups['10']])):
path += ' %f,%f' % (vals[groups['10']][i], vals[groups['20']][i])
attribs = {'d': path, 'style': style}
inkex.etree.SubElement(layer, 'path', attribs)
def export_LWPOLYLINE():
# mandatory group codes : (10, 20, 70) (x, y, flags)
if vals[groups['10']] and vals[groups['20']] and vals[groups['70']]:
if len(vals[groups['10']]) > 1 and len(vals[groups['20']]) == len(vals[groups['10']]):
# optional group codes : (42) (bulge)
iseqs = 0
ibulge = 0
while seqs[iseqs] != '20':
iseqs += 1
path = 'M %f,%f' % (vals[groups['10']][0], vals[groups['20']][0])
xold = vals[groups['10']][0]
yold = vals[groups['20']][0]
for i in range (1, len(vals[groups['10']])):
bulge = 0
iseqs += 1
while seqs[iseqs] != '20':
if seqs[iseqs] == '42':
bulge = vals[groups['42']][ibulge]
ibulge += 1
iseqs += 1
if bulge:
sweep = 0 # sweep CCW
if bulge < 0:
sweep = 1 # sweep CW
bulge = -bulge
large = 0 # large-arc-flag
if bulge > 1:
large = 1
r = math.sqrt((vals[groups['10']][i] - xold)**2 + (vals[groups['20']][i] - yold)**2)
r = 0.25*r*(bulge + 1.0/bulge)
path += ' A %f,%f 0.0 %d %d %f,%f' % (r, r, large, sweep, vals[groups['10']][i], vals[groups['20']][i])
else:
path += ' L %f,%f' % (vals[groups['10']][i], vals[groups['20']][i])
xold = vals[groups['10']][i]
yold = vals[groups['20']][i]
if vals[groups['70']][0] == 1: # closed path
path += ' z'
attribs = {'d': path, 'style': style}
inkex.etree.SubElement(layer, 'path', attribs)
def generate_ellipse(xc, yc, xm, ym, w, a1, a2):
rm = math.sqrt(xm*xm + ym*ym)
a = math.atan(ym/xm)
if xm < 0:
a += math.pi
diff = (a2 - a1 + 2*math.pi) % (2*math.pi)
if diff: # open arc
large = 0 # large-arc-flag
if diff > math.pi:
large = 1
xt = rm*math.cos(a1)
yt = w*rm*math.sin(a1)
x1 = xt*math.cos(a) - yt*math.sin(a)
y1 = xt*math.sin(a) + yt*math.cos(a)
xt = rm*math.cos(a2)
yt = w*rm*math.sin(a2)
x2 = xt*math.cos(a) - yt*math.sin(a)
y2 = xt*math.sin(a) + yt*math.cos(a)
path = 'M %f,%f A %f,%f %f %d 0 %f,%f' % (xc+x1, yc-y1, rm, w*rm, -180.0*a/math.pi, large, xc+x2, yc-y2)
else: # closed arc
path = 'M %f,%f A %f,%f %f 1 0 %f,%f %f,%f %f 1 0 %f,%f z' % (xc+xm, yc-ym, rm, w*rm, -180.0*a/math.pi, xc-xm, yc+ym, rm, w*rm, -180.0*a/math.pi, xc+xm, yc-ym)
attribs = {'d': path, 'style': style}
inkex.etree.SubElement(layer, 'path', attribs)
def get_line():
return (stream.readline().strip(), stream.readline().strip())
def get_group(group):
line = get_line()
if line[0] == group:
return float(line[1])
else:
return 0.0
# define DXF Entities and specify which Group Codes to monitor
entities = {'MTEXT': export_MTEXT, 'TEXT': export_MTEXT, 'POINT': export_POINT, 'LINE': export_LINE, 'SPLINE': export_SPLINE, 'CIRCLE': export_CIRCLE, 'ARC': export_ARC, 'ELLIPSE': export_ELLIPSE, 'LEADER': export_LEADER, 'LWPOLYLINE': export_LWPOLYLINE, 'ENDSEC': ''}
groups = {'1': 0, '8': 1, '10': 2, '11': 3, '20': 4, '21': 5, '40': 6, '41': 7, '42': 8, '50': 9, '51': 10, '62': 11, '70': 12, '370': 13}
colors = { 1: '#FF0000', 2: '#FFFF00', 3: '#00FF00', 4: '#00FFFF', 5: '#0000FF',
6: '#FF00FF', 8: '#414141', 9: '#808080', 30: '#FF7F00',
250: '#333333', 251: '#505050', 252: '#696969', 253: '#828282', 254: '#BEBEBE', 255: '#FFFFFF'}
doc = inkex.etree.parse(StringIO('<svg xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"></svg>'))
stream = open(inkex.sys.argv[1], 'r')
xmax = xmin = 0.0
ymax = 297.0 # default A4 height in mm
line = get_line()
flag = 0
layer_colors = {} # store colors by layer
layer_nodes = {} # store nodes by layer
while line[0] and line[1] != 'ENTITIES':
line = get_line()
if line[1] == '$EXTMIN':
xmin = get_group('10')
if line[1] == '$EXTMAX':
xmax = get_group('10')
ymax = get_group('20')
if flag and line[0] == '2':
name = line[1]
attribs = {inkex.addNS('groupmode','inkscape'): 'layer', inkex.addNS('label','inkscape'): '%s' % name}
layer_nodes[name] = inkex.etree.SubElement(doc.getroot(), 'g', attribs)
if line[0] == '2' and line[1] == 'LAYER':
flag = 1
if flag and line[0] == '62':
layer_colors[name] = int(line[1])
if line[0] == '0' and line[1] == 'ENDTAB':
flag = 0
scale = 90.0/25.4 # default convert from mm to pixels
if xmax > xmin:
scale *= 210.0/(xmax - xmin) # scale to A4 width
entity = ''
while line[0] and line[1] != 'ENDSEC':
line = get_line()
if entity and groups.has_key(line[0]):
seqs.append(line[0]) # list of group codes
if line[0] == '1' or line[0] == '8': # text value
val = line[1].replace('\~', ' ')
val = unicode(val, "iso-8859-1")
elif line[0] == '62' or line[0] == '70': # unscaled integer value
val = int(line[1])
elif line[0] == '10': # scaled float x value
val = scale*(float(line[1]) - xmin)
elif line[0] == '20': # scaled float y value
val = - scale*(float(line[1]) - ymax)
else: # unscaled float value
val = float(line[1])
vals[groups[line[0]]].append(val)
elif entities.has_key(line[1]):
if entities.has_key(entity):
color = '#000000' # default color
if vals[groups['8']]: # Common Layer Name
layer = layer_nodes[vals[groups['8']][0]]
if layer_colors.has_key(vals[groups['8']][0]):
if colors.has_key(layer_colors[vals[groups['8']][0]]):
color = colors[layer_colors[vals[groups['8']][0]]]
if vals[groups['62']]: # Common Color Number
if colors.has_key(vals[groups['62']][0]):
color = colors[vals[groups['62']][0]]
style = simplestyle.formatStyle({'stroke': '%s' % color, 'fill': 'none'})
w = 0.5 # default lineweight for POINT
if vals[groups['370']]: # Common Lineweight
if vals[groups['370']][0] > 0:
w = scale*vals[groups['370']][0]/100.0
if w < 0.5:
w = 0.5
style = simplestyle.formatStyle({'stroke': '%s' % color, 'fill': 'none', 'stroke-width': '%.1f' % w})
entities[entity]()
entity = line[1]
vals = [[],[],[],[],[],[],[],[],[],[],[],[],[],[]]
seqs = []
doc.write(inkex.sys.stdout)
# vim: expandtab shiftwidth=4 tabstop=8 softtabstop=4 encoding=utf-8 textwidth=99
|
