mapnik/tests/python_tests/glyph_symbolizer_test.py

67 lines
2.1 KiB
Python

#!/usr/bin/env python
from nose.tools import *
from utilities import execution_path, save_data, Todo
import os, mapnik2
def setup():
# All of the paths used are relative, if we run the tests
# from another directory we need to chdir()
os.chdir(execution_path('.'))
def test_glyph_symbolizer():
srs = '+init=epsg:32630'
lyr = mapnik2.Layer('arrows')
lyr.datasource = mapnik2.Shapefile(
file = '../data/shp/arrows.shp',
)
lyr.srs = srs
_map = mapnik2.Map(256,256, srs)
style = mapnik2.Style()
rule = mapnik2.Rule()
sym = mapnik2.GlyphSymbolizer("DejaVu Sans Condensed", mapnik2.Expression("'A'"))
sym.allow_overlap = True
sym.angle = mapnik2.Expression("[azimuth]-90")
sym.value = mapnik2.Expression("[value]")
sym.size = mapnik2.Expression("[value]")
sym.colorizer = mapnik2.RasterColorizer()
for value, color in [
( 0, "#0044cc"),
( 10, "#00cc00"),
( 20, "#ffff00"),
( 30, "#ff7f00"),
( 40, "#ff0000"),
]:
sym.colorizer.append_band(value, mapnik2.Color(color))
rule.symbols.append(sym)
style.rules.append(rule)
_map.append_style('foo', style)
lyr.styles.append('foo')
_map.layers.append(lyr)
_map.zoom_to_box(mapnik2.Box2d(0,0,8,8))
im = mapnik2.Image(_map.width,_map.height)
mapnik2.render(_map, im)
save_data('test_glyph_symbolizer.png', im.tostring('png'))
imdata = im.tostring()
assert len(imdata) > 0
raise Todo("Implement the process methods of the agg/cairo renderers for GlyphSymbolizer")
# we have features with 20 as a value so check that they're colored
assert '\xff\xff\xff\x00' in imdata
def test_load_save_map():
raise Todo("Implement XML de/serialization for GlyphSymbolizer")
map = mapnik2.Map(256,256)
in_map = "../data/good_maps/glyph_symbolizer.xml"
mapnik2.load_map(map, in_map)
out_map = mapnik2.save_map_to_string(map)
assert 'GlyphSymbolizer' in out_map
assert 'RasterSymbolizer' in out_map
assert 'RasterColorizer' in out_map
assert 'ColorBand' in out_map