boxespy/boxes/formats.py

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2016-06-27 09:10:00 +02:00
import subprocess
import tempfile
import os
import cairo
from boxes import svgutil
class Formats:
pstoedit = "/usr/bin/pstoedit"
formats = {
"svg" : None,
"ps" : None,
"dxf" : "-f dxf -mm".split(),
"gcode" : "-f gcode".split(),
"plt" : "-f hpgl".split(),
}
http_headers = {
"svg" : [('Content-type', 'image/svg+xml; charset=utf-8')],
"ps" : [('Content-type', 'application/postscript')],
"dxf" : [('Content-type', 'image/vnd.dxf')],
"plt" : [('Content-type', ' application/vnd.hp-hpgl')],
"gcode" : [('Content-type', 'text/plain; charset=utf-8')],
# "" : [('Content-type', '')],
}
def __init__(self):
pass
def getFormats(self):
if os.path.isfile(self.pstoedit):
return sorted(self.formats.keys())
else:
return ['svg', 'ps']
def getSurface(self, fmt, filename):
width = height = 10000 # mm
2016-06-27 09:10:00 +02:00
if fmt == "svg":
surface = cairo.SVGSurface(filename, width, height)
mm2pt = 1.0
else:
mm2pt = 72 / 25.4
width *= mm2pt
height *= mm2pt #3.543307
surface = cairo.PSSurface(filename, width, height)
ctx = cairo.Context(surface)
ctx.translate(0, height)
ctx.scale(mm2pt, -mm2pt)
ctx.set_source_rgb(0.0, 0.0, 0.0)
return surface, ctx
def convert(self, filename, fmt):
if fmt == 'svg':
svg = svgutil.SVGFile(filename)
svg.getEnvelope()
svg.rewriteViewPort()
elif fmt == "ps":
pass
else:
fd, tmpfile = tempfile.mkstemp()
cmd = [self.pstoedit] + self.formats[fmt] + [filename, tmpfile]
print(cmd)
err = subprocess.call(cmd)
if err:
# XXX show stderr output
raise ValueError("Conversion failed. pstoedit returned %i" % err)
os.rename(tmpfile, filename)