#!/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('