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#!/usr/bin/env python
# -*- coding: utf-8 -*-
from nose.tools import *
import os, mapnik2
from nose.tools import *
from utilities import execution_path
from utilities import Todo
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_simplest_render():
m = mapnik2.Map(256, 256)
i = mapnik2.Image(m.width, m.height)
mapnik2.render(m, i)
s = i.tostring()
eq_(s, 256 * 256 * '\x00\x00\x00\x00')
def test_render_image_to_string():
i = mapnik2.Image(256, 256)
i.background = mapnik2.Color('black')
s = i.tostring()
eq_(s, 256 * 256 * '\x00\x00\x00\xff')
s = i.tostring('png')
def test_setting_alpha():
w,h = 256,256
im1 = mapnik2.Image(w,h)
# white, half transparent
im1.background = mapnik2.Color('rgba(255,255,255,.5)')
# pure white
im2 = mapnik2.Image(w,h)
im2.background = mapnik2.Color('rgba(255,255,255,1)')
im2.set_alpha(.5)
eq_(len(im1.tostring()), len(im2.tostring()))
def test_render_image_to_file():
i = mapnik2.Image(256, 256)
i.background = mapnik2.Color('black')
if mapnik2.has_jpeg():
i.save('test.jpg')
i.save('test.png', 'png')
if os.path.exists('test.jpg'):
os.remove('test.jpg')
else:
return False
if os.path.exists('test.png'):
os.remove('test.png')
else:
return False
def get_paired_images(w,h,mapfile):
tmp_map = 'tmp_map.xml'
m = mapnik2.Map(w,h)
mapnik2.load_map(m,mapfile)
i = mapnik2.Image(w,h)
m.zoom_all()
mapnik2.render(m,i)
mapnik2.save_map(m,tmp_map)
m2 = mapnik2.Map(w,h)
mapnik2.load_map(m2,tmp_map)
i2 = mapnik2.Image(w,h)
m2.zoom_all()
mapnik2.render(m2,i2)
os.remove(tmp_map)
return i,i2
def test_render_from_serialization():
i,i2 = get_paired_images(100,100,'../data/good_maps/building_symbolizer.xml')
eq_(i.tostring(),i2.tostring())
i,i2 = get_paired_images(100,100,'../data/good_maps/polygon_symbolizer.xml')
eq_(i.tostring(),i2.tostring())
grid_correct = {"keys": ["", "North West", "North East", "South West", "South East"], "data": {"South East": {"Name": "South East"}, "North East": {"Name": "North East"}, "North West": {"Name": "North West"}, "South West": {"Name": "South West"}}, "grid": [" ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " !!! ### ", " !!!!! ##### ", " !!!!! ##### ", " !!! ### ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " $$$$ %%%% ", " $$$$$ %%%%% ", " $$$$$ %%%%% ", " $$$ %%% ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " "]}
def resolve(grid,x,y):
""" Resolve the attributes for a given pixel in a grid.
js version:
https://github.com/mapbox/mbtiles-spec/blob/master/1.1/utfgrid.md
spec:
https://github.com/mapbox/wax/blob/master/control/lib/gridutil.js
"""
utf_val = grid['grid'][x][y]
#http://docs.python.org/library/functions.html#ord
codepoint = ord(utf_val)
if (codepoint >= 93):
codepoint-=1
if (codepoint >= 35):
codepoint-=1
codepoint -= 32
key = grid['keys'][codepoint]
return grid['data'].get(key)
def test_render_grid():
places_ds = mapnik2.PointDatasource()
places_ds.add_point(143.10,-38.60,'Name','South East')
places_ds.add_point(142.48,-38.60,'Name','South West')
places_ds.add_point(142.48,-38.38,'Name','North West')
places_ds.add_point(143.10,-38.38,'Name','North East')
s = mapnik2.Style()
r = mapnik2.Rule()
#symb = mapnik2.PointSymbolizer()
symb = mapnik2.MarkersSymbolizer()
symb.allow_overlap = True
r.symbols.append(symb)
label = mapnik2.TextSymbolizer(mapnik2.Expression('[Name]'),
'DejaVu Sans Book',
10,
mapnik2.Color('black')
)
label.allow_overlap = True
label.displacement = (0,-10)
#r.symbols.append(label)
s.rules.append(r)
lyr = mapnik2.Layer('Places')
lyr.datasource = places_ds
lyr.styles.append('places_labels')
m = mapnik2.Map(256,256)
m.append_style('places_labels',s)
m.layers.append(lyr)
ul_lonlat = mapnik2.Coord(142.30,-38.20)
lr_lonlat = mapnik2.Coord(143.40,-38.80)
m.zoom_to_box(mapnik2.Box2d(ul_lonlat,lr_lonlat))
grid = mapnik2.render_grid(m,0,key='Name',resolution=4,fields=['Name'])
eq_(grid,grid_correct)
eq_(resolve(grid,0,0),None)
# check every pixel of the nw symbol
expected = {"Name": "North West"}
# top row
eq_(resolve(grid,23,9),expected)
eq_(resolve(grid,23,10),expected)
eq_(resolve(grid,23,11),expected)
# core
eq_(resolve(grid,24,8),expected)
eq_(resolve(grid,24,9),expected)
eq_(resolve(grid,24,10),expected)
eq_(resolve(grid,24,11),expected)
eq_(resolve(grid,24,12),expected)
eq_(resolve(grid,25,8),expected)
eq_(resolve(grid,25,9),expected)
eq_(resolve(grid,25,10),expected)
eq_(resolve(grid,25,11),expected)
eq_(resolve(grid,25,12),expected)
# bottom row
eq_(resolve(grid,26,9),expected)
eq_(resolve(grid,26,10),expected)
eq_(resolve(grid,26,11),expected)
def test_render_points():
if not mapnik2.has_cairo(): return
# create and populate point datasource (WGS84 lat-lon coordinates)
places_ds = mapnik2.PointDatasource()
places_ds.add_point(142.48,-38.38,'Name','Westernmost Point') # westernmost
places_ds.add_point(143.10,-38.60,'Name','Southernmost Point') # southernmost
# create layer/rule/style
s = mapnik2.Style()
r = mapnik2.Rule()
symb = mapnik2.PointSymbolizer()
symb.allow_overlap = True
r.symbols.append(symb)
s.rules.append(r)
lyr = mapnik2.Layer('Places','+proj=latlon +datum=WGS84')
lyr.datasource = places_ds
lyr.styles.append('places_labels')
# latlon bounding box corners
ul_lonlat = mapnik2.Coord(142.30,-38.20)
lr_lonlat = mapnik2.Coord(143.40,-38.80)
# render for different projections
projs = {
'latlon': '+proj=latlon +datum=WGS84',
'merc': '+proj=merc +datum=WGS84 +k=1.0 +units=m +over +no_defs',
'google': '+proj=merc +ellps=sphere +R=6378137 +a=6378137 +units=m',
'utm': '+proj=utm +zone=54 +datum=WGS84'
}
for projdescr in projs.iterkeys():
m = mapnik2.Map(1000, 500, projs[projdescr])
m.append_style('places_labels',s)
m.layers.append(lyr)
p = mapnik2.Projection(projs[projdescr])
m.zoom_to_box(p.forward(mapnik2.Box2d(ul_lonlat,lr_lonlat)))
# Render to SVG so that it can be checked how many points are there with string comparison
svg_file = '/tmp/%s.svg'
mapnik2.render_to_file(m, svg_file)
num_points_present = len(places_ds.all_features())
svg = open(svg_file,'r').read()
num_points_rendered = svg.count('<image ')
eq_(num_points_present, num_points_rendered, "Not all points were rendered (%d instead of %d) at projection %s" % (num_points_rendered, num_points_present, projdescr))
if __name__ == "__main__":
setup()
[eval(run)() for run in dir() if 'test_' in run]
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