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mightyscape-1.1-deprecated/extensions/fablabchemnitz/webp_import/webp_import.py

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#!/usr/bin/env python3
import sys
import os
import argparse
import inkex
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import shutil
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from inkex import Rectangle
from PIL import Image
import base64
from io import BytesIO, StringIO
import subprocess
from lxml import etree
class WebpImport(inkex.InputExtension):
def add_arguments(self, pars):
pars.add_argument('inputfile')
def effect(self):
if os.name == 'nt':
tmp = os.getenv('TEMP') + '\\'
else:
tmp = '/tmp/'
convertfile = os.path.join(tmp, "webp.png")
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if shutil.which('magick'):
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command = "magick \"%s\" \"%s\" " % (self.options.inputfile, convertfile)
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elif shutil.which('convert'):
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command = "convert \"%s\" \"%s\" " % (self.options.inputfile, convertfile)
else:
inkex.errormsg('ImageMagick does not appear to be installed.')
exit()
p = subprocess.Popen(command, shell=True)
return_code = p.wait()
#inkex.utils.debug("command:" + command)
#inkex.utils.debug("Errorcode:" + str(return_code))
try:
img = Image.open(convertfile)
except Image.DecompressionBombError as e: #we could also increse PIL.Image.MAX_IMAGE_PIXELS = some large int
self.msg("Error. Image is too large. Reduce DPI and try again!")
exit(1)
output_buffer = BytesIO()
img.save(output_buffer, format='PNG')
width, height = img.size
byte_data = output_buffer.getvalue()
base64_str = base64.b64encode(byte_data).decode('UTF-8')
webp = etree.SubElement(Rectangle(), '{http://www.w3.org/2000/svg}image')
webp.attrib['x'] = str(0)
webp.attrib['y'] = str(0)
webp.attrib['width'] = str(width)
webp.attrib['height'] = str(height)
webp.attrib['{http://www.w3.org/1999/xlink}href'] = "data:image/png;base64,{}".format(base64_str)
base = ('<svg xmlns="http://www.w3.org/2000/svg"'
' width="{}px" height="{}px" viewBox="{} {} {} {}"/>'
).format(width, height, 0, 0, width, height)
output = StringIO(base)
tree = etree.parse(output)
output.close()
tree.getroot().append(webp)
svgfile = os.path.join(tmp, "webp.svg")
with open(svgfile, 'w') as file:
tree.write(svgfile)
with open(svgfile, 'r') as newfile:
sys.stdout.write(newfile.read())
def load(self, stream):
return str(stream.read())
if __name__ == '__main__':
WebpImport().run()