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jpegexport.py
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jpegexport.py
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#! /usr/bin/env python
#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 3 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, see <http://www.gnu.org/licenses/>.
# Author: Giacomo Mirabassi <giacomo@mirabassi.it>
# Version: 0.2
import sys
import os
import re
from distutils.spawn import find_executable
import subprocess
import math
import inkex
import simpletransform
inkex.localize()
class JPEGExport(inkex.Effect):
def __init__(self):
"""Init the effect library and get options from gui."""
inkex.Effect.__init__(self)
self.OptionParser.add_option("--path", action="store", type="string", dest="path", default="", help="")
self.OptionParser.add_option("--bgcol", action="store", type="string", dest="bgcol", default="#ffffff", help="")
self.OptionParser.add_option("--quality", action="store", type="int", dest="quality", default="90", help="")
self.OptionParser.add_option("--density", action="store", type="int", dest="density", default="90", help="")
self.OptionParser.add_option("--page", action="store", type="inkbool", dest="page", default=False, help="")
self.OptionParser.add_option("--fast", action="store", type="inkbool", dest="fast", default=True, help="")
def effect(self):
"""get selected item coords and call command line command to export as a png"""
# The user must supply a directory to export:
if not self.options.path:
inkex.errormsg(_('Please indicate a file name and path to export the jpg.'))
exit()
if not os.path.basename(self.options.path):
inkex.errormsg(_('Please indicate a file name.'))
exit()
if not os.path.dirname(self.options.path):
inkex.errormsg(_('Please indicate a directory other than your system\'s base directory.'))
exit()
# Test if the directory exists:
if not os.path.exists(os.path.dirname(self.options.path)):
inkex.errormsg(_('The directory "%s" does not exist.') % os.path.dirname(self.options.path))
exit()
outfile=self.options.path
curfile = self.args[-1]
# Test if color is valid
_rgbhexstring = re.compile(r'#[a-fA-F0-9]{6}$')
if not _rgbhexstring.match(self.options.bgcol):
inkex.errormsg(_('Please indicate the background color like this: \"#abc123\" or leave the field empty for white.'))
exit()
bgcol = self.options.bgcol
if self.options.page == False:
if len(self.selected) == 0:
inkex.errormsg(_('Please select something.'))
exit()
coords=self.processSelected()
self.exportArea(int(coords[0]),int(coords[1]),int(coords[2]),int(coords[3]),curfile,outfile,bgcol)
elif self.options.page == True:
self.exportPage(curfile,outfile,bgcol)
def processSelected(self):
"""Iterate trough nodes and find the bounding coordinates of the selected area"""
startx=None
starty=None
endx=None
endy=None
nodelist=[]
root=self.document.getroot();
toty=self.getUnittouu(root.attrib['height'])
scale = self.getUnittouu('1px')
props=['x', 'y', 'width', 'height']
for id in self.selected:
if self.options.fast == True: # uses simpletransform
nodelist.append(self.getElementById(id))
else: # uses command line
rawprops=[]
for prop in props:
command=("inkscape", "--without-gui", "--query-id", id, "--query-"+prop, self.args[-1])
proc=subprocess.Popen(command,stdout=subprocess.PIPE,stderr=subprocess.PIPE)
proc.wait()
rawprops.append(math.ceil(self.getUnittouu(proc.stdout.read())))
nodeEndX = rawprops[0] + rawprops[2]
nodeStartY = toty - rawprops[1] - rawprops[3]
nodeEndY = toty - rawprops[1]
if rawprops[0] < startx or startx is None:
startx = rawprops[0]
if nodeStartY < starty or starty is None:
starty = nodeStartY
if nodeEndX > endx or endx is None:
endx = nodeEndX
if nodeEndY > endy or endy is None:
endy = nodeEndY
if self.options.fast == True: # uses simpletransform
bbox = simpletransform.computeBBox(nodelist)
startx = math.ceil(bbox[0])
endx = math.ceil(bbox[1])
h = -bbox[2] + bbox[3]
starty = toty - math.ceil(bbox[2]) -h
endy = toty - math.ceil(bbox[2])
coords = [startx / scale, starty / scale, endx / scale, endy / scale]
return coords
def exportArea(self, x0, y0, x1, y1, curfile, outfile, bgcol):
tmp = self.getTmpPath()
command="inkscape -a %s:%s:%s:%s -d %s -e \"%sjpinkexp.png\" -b \"%s\" %s" % (x0, y0, x1, y1, self.options.density, tmp, bgcol, curfile)
p = subprocess.Popen(command, shell=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
return_code = p.wait()
f = p.stdout
err = p.stderr
self.tojpeg(outfile)
def exportPage(self, curfile, outfile, bgcol):
tmp = self.getTmpPath()
command = "inkscape -C -d %s -e \"%sjpinkexp.png\" -b\"%s\" %s" % (self.options.density, tmp,bgcol, curfile)
p = subprocess.Popen(command, shell=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
return_code = p.wait()
f = p.stdout
err = p.stderr
self.tojpeg(outfile)
def tojpeg(self,outfile):
tmp = self.getTmpPath()
if os.name == 'nt':
outfile = outfile.encode('string-escape')
# set the ImageMagick command to run based on what's installed
if find_executable('magick'):
command = "magick -sampling-factor 4:4:4 -strip -interlace JPEG -colorspace RGB -quality %s -density %s \"%sjpinkexp.png\" \"%s\" " % (self.options.quality, self.options.density, tmp, outfile)
elif find_executable('convert'):
command = "convert \"%sjpinkexp.png\" -sampling-factor 4:4:4 -strip -interlace JPEG -colorspace RGB -quality %s -density %s \"%s\" " % (tmp, self.options.quality, self.options.density, outfile)
else:
inkex.errormsg(_('ImageMagick does not appear to be installed.'))
exit()
p = subprocess.Popen(command, shell=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
return_code = p.wait()
f = p.stdout
err = p.stderr
def getTmpPath(self):
"""Define the temporary folder path depending on the operating system"""
if os.name == 'nt':
return 'C:\\WINDOWS\\Temp\\'
else:
return '/tmp/'
def getUnittouu(self, param):
try:
return inkex.unittouu(param)
except AttributeError:
return self.unittouu(param)
def _main():
e = JPEGExport()
e.affect()
exit()
if __name__=="__main__":
_main()