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#!/usr/bin/env python
import os
from nose.tools import eq_
import mapnik
from .utilities import execution_path, run_all
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_multi_tile_policy():
srs = '+proj=longlat +ellps=WGS84 +datum=WGS84 +no_defs'
lyr = mapnik.Layer('raster')
if 'raster' in mapnik.DatasourceCache.plugin_names():
lyr.datasource = mapnik.Raster(
file='../data/raster_tiles/${x}/${y}.tif',
lox=-180,
loy=-90,
hix=180,
hiy=90,
multi=1,
tile_size=256,
x_width=2,
y_width=2
)
lyr.srs = srs
_map = mapnik.Map(256, 256, srs)
style = mapnik.Style()
rule = mapnik.Rule()
sym = mapnik.RasterSymbolizer()
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(lyr.envelope())
im = mapnik.Image(_map.width, _map.height)
mapnik.render(_map, im)
# test green chunk
eq_(im.view(0, 64, 1, 1).tostring(), b'\x00\xff\x00\xff')
eq_(im.view(127, 64, 1, 1).tostring(), b'\x00\xff\x00\xff')
eq_(im.view(0, 127, 1, 1).tostring(), b'\x00\xff\x00\xff')
eq_(im.view(127, 127, 1, 1).tostring(), b'\x00\xff\x00\xff')
# test blue chunk
eq_(im.view(128, 64, 1, 1).tostring(), b'\x00\x00\xff\xff')
eq_(im.view(255, 64, 1, 1).tostring(), b'\x00\x00\xff\xff')
eq_(im.view(128, 127, 1, 1).tostring(), b'\x00\x00\xff\xff')
eq_(im.view(255, 127, 1, 1).tostring(), b'\x00\x00\xff\xff')
# test red chunk
eq_(im.view(0, 128, 1, 1).tostring(), b'\xff\x00\x00\xff')
eq_(im.view(127, 128, 1, 1).tostring(), b'\xff\x00\x00\xff')
eq_(im.view(0, 191, 1, 1).tostring(), b'\xff\x00\x00\xff')
eq_(im.view(127, 191, 1, 1).tostring(), b'\xff\x00\x00\xff')
# test magenta chunk
eq_(im.view(128, 128, 1, 1).tostring(), b'\xff\x00\xff\xff')
eq_(im.view(255, 128, 1, 1).tostring(), b'\xff\x00\xff\xff')
eq_(im.view(128, 191, 1, 1).tostring(), b'\xff\x00\xff\xff')
eq_(im.view(255, 191, 1, 1).tostring(), b'\xff\x00\xff\xff')
if __name__ == "__main__":
setup()
exit(run_all(eval(x) for x in dir() if x.startswith("test_")))
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