101 lines
2.8 KiB
Python
101 lines
2.8 KiB
Python
import subprocess
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import tempfile
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import os
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import cairo
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import re
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from boxes import svgutil
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class PSFile:
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def __init__(self, filename):
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self.filename = filename
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def adjustDocumentMedia(self):
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with open(self.filename, "r+") as f:
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s = f.read(1024)
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m = re.search(r"%%BoundingBox: (\d+) (\d+) (\d+) (\d+)", s)
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if not m:
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raise ValueError("%%BoundingBox in Postscript file not found")
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x1, y1, x2, y2 = m.groups()
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m = re.search(r"%%DocumentMedia: \d+x\d+mm ((\d+) (\d+)) 0 \(", s)
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f.seek(m.start(1))
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media = "%i %i" % (int(x1) + int(x2), int(y1) + int(y2))
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f.write(media + " " * (len(m.group(1)) - len(media)))
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class Formats:
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pstoedit = "/usr/bin/pstoedit"
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formats = {
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"svg": None,
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"ps": None,
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"dxf": "-flat 0.1 -f dxf:-mm".split(),
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"gcode": "-f gcode".split(),
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"plt": "-f plot-hpgl".split(),
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"ai": "-f ps2ai".split(),
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"pdf": "-f pdf".split(),
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}
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http_headers = {
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"svg": [('Content-type', 'image/svg+xml; charset=utf-8')],
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"ps": [('Content-type', 'application/postscript')],
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"dxf": [('Content-type', 'image/vnd.dxf')],
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"plt": [('Content-type', ' application/vnd.hp-hpgl')],
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"gcode": [('Content-type', 'text/plain; charset=utf-8')],
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# "" : [('Content-type', '')],
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}
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def __init__(self):
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pass
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def getFormats(self):
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if os.path.isfile(self.pstoedit):
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return sorted(self.formats.keys())
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else:
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return ['svg', 'ps']
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def getSurface(self, fmt, filename):
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width = height = 10000 # mm
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if fmt == "svg":
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surface = cairo.SVGSurface(filename, width, height)
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mm2pt = 1.0
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else:
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mm2pt = 72 / 25.4
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width *= mm2pt
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height *= mm2pt # 3.543307
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surface = cairo.PSSurface(filename, width, height)
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ctx = cairo.Context(surface)
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ctx.translate(0, height)
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ctx.scale(mm2pt, -mm2pt)
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ctx.set_source_rgb(0.0, 0.0, 0.0)
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return surface, ctx
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def convert(self, filename, fmt):
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if fmt == 'svg':
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svg = svgutil.SVGFile(filename)
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svg.getEnvelope()
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svg.rewriteViewPort()
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else:
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ps = PSFile(filename)
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ps.adjustDocumentMedia()
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if fmt not in ("svg", "ps"):
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fd, tmpfile = tempfile.mkstemp(dir=os.path.dirname(filename))
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cmd = [self.pstoedit] + self.formats[fmt] + [filename, tmpfile]
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err = subprocess.call(cmd)
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if err:
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# XXX show stderr output
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raise ValueError("Conversion failed. pstoedit returned %i" % err)
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os.rename(tmpfile, filename)
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