monomono
/
replica_gpx2svg
mirror of
1
0
Fork 0
Code Issues Releases Wiki Activity

Use a generator function instead of creating a huge string for each segment.

This commit is contained in:
Tobias Leupold 2015-01-04 02:26:04 +01:00
parent 6786336ea3
commit d2fcd55ec7
1 changed files with 21 additions and 32 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

53
gpx2svg
View File

@ -1,6 +1,6 @@
#!/usr/bin/env python3
# Copyright (c) 2012-2014 Tobias Leupold <tobias.leupold@web.de>
# Copyright (c) 2012-2015 Tobias Leupold <tobias.leupold@web.de>
#
# gpx2svg - Convert GPX formatted geodata to Scalable Vector Graphics (SVG)
#
@ -17,7 +17,7 @@
# with this program; if not, write to the Free Software Foundation, Inc.,
# 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
__version__ = '0.1.3'
__version__ = '0.1.4'
import argparse
import sys
@ -188,19 +188,10 @@ def scaleCoords(coord, height, scale):
"""Return a scaled pair of coordinates"""
return(coord[0] * scale, (coord[1] * -1 + height) * scale)
def createCoordString(segment, height, scale):
def generateScaledSegment(segment, height, scale):
"""Create the coordinate part of an SVG path string from a GPS data segment"""
coordString = ''
for coord in segment:
x, y = scaleCoords(coord, height, scale)
coordString = '{} {} {}'.format(coordString, x, y)
return coordString
def createPathString(drawCommand):
"""Return a complete path element for a draw command string"""
return '<path d="{}" style="fill:none;stroke:black" />\n'.format(drawCommand)
yield(scaleCoords(coord, height, scale))
def writeSvgData(gpsData, width, height, maxPixels, dropSinglePoints, outfile):
"""Output the SVG data -- quick 'n' dirty, without messing around with dom stuff ;-)"""
@ -218,24 +209,18 @@ def writeSvgData(gpsData, width, height, maxPixels, dropSinglePoints, outfile):
try:
fp = open(outfile, 'w')
except IOError as error:
print('Can\'t open output file: {}. Terminating.'.format(error), file = sys.stderr)
print("Can't open output file: {}. Terminating.".format(error), file = sys.stderr)
sys.exit(1)
else:
fp = sys.stdout
# Header data
fp.write('<?xml version="1.0" encoding="UTF-8" standalone="no"?>\n')
fp.write((
'<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" '
'"http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">\n'
))
fp.write('<!-- Created with gpx2svg {} -->\n'.format(__version__))
fp.write(
(
'<svg xmlns="http://www.w3.org/2000/svg" version="1.1" '
'width="{}px" height="{}px">\n'
).format(width * scale, height * scale)
)
fp.write( '<?xml version="1.0" encoding="UTF-8" standalone="no"?>\n')
fp.write(('<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" '
'"http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">\n'))
fp.write( '<!-- Created with gpx2svg {} -->\n'.format(__version__))
fp.write(('<svg xmlns="http://www.w3.org/2000/svg" version="1.1" '
'width="{}px" height="{}px">\n').format(width * scale, height * scale))
# Process all track segments and generate ids and path drawing commands for them
@ -270,14 +255,20 @@ def writeSvgData(gpsData, width, height, maxPixels, dropSinglePoints, outfile):
if len(circularSegments) > 0:
fp.write('<g>\n')
for segment in circularSegments:
fp.write(createPathString('M{} Z'.format(createCoordString(segment, height, scale))))
fp.write('<path d="M')
for x, y in generateScaledSegment(segment, height, scale):
fp.write(' {} {}'.format(x, y))
fp.write(' Z" style="fill:none;stroke:black"/>\n')
fp.write('</g>\n')
# Draw all un-closed paths
if len(straightSegments) > 0:
fp.write('<g>\n')
for segment in straightSegments:
fp.write(createPathString('M{}'.format(createCoordString(segment, height, scale))))
fp.write('<path d="M')
for x, y in generateScaledSegment(segment, height, scale):
fp.write(' {} {}'.format(x, y))
fp.write('" style="fill:none;stroke:black"/>\n')
fp.write('</g>\n')
# Close the XML
@ -311,10 +302,8 @@ def main():
)
cmdArgParser.add_argument(
'-r', action = 'store_true',
help = (
'"Raw" conversion: Create one SVG path per track segment, don\'t try to combine paths '
'that end with the starting point of another path'
)
help = ('"Raw" conversion: Create one SVG path per track segment, don\'t try to combine '
'paths that end with the starting point of another path')
)
# Get the given arguments