134 lines
3.9 KiB
Python
134 lines
3.9 KiB
Python
#!/usr/bin/env python
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from nose.tools import *
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import os, mapnik2
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from utilities import Todo
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def test_simplest_render():
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m = mapnik2.Map(256, 256)
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i = mapnik2.Image(m.width, m.height)
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mapnik2.render(m, i)
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s = i.tostring()
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eq_(s, 256 * 256 * '\x00\x00\x00\x00')
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def test_render_image_to_string():
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i = mapnik2.Image(256, 256)
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i.background = mapnik2.Color('black')
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s = i.tostring()
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eq_(s, 256 * 256 * '\x00\x00\x00\xff')
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s = i.tostring('png')
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def test_setting_alpha():
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w,h = 256,256
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im1 = mapnik2.Image(w,h)
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# white, half transparent
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im1.background = mapnik2.Color('rgba(255,255,255,.5)')
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# pure white
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im2 = mapnik2.Image(w,h)
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im2.background = mapnik2.Color('rgba(255,255,255,1)')
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im2.set_alpha(.5)
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eq_(len(im1.tostring()), len(im2.tostring()))
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def test_render_image_to_file():
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i = mapnik2.Image(256, 256)
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i.background = mapnik2.Color('black')
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if mapnik2.has_jpeg():
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i.save('test.jpg')
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i.save('test.png', 'png')
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if os.path.exists('test.jpg'):
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os.remove('test.jpg')
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else:
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return False
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if os.path.exists('test.png'):
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os.remove('test.png')
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else:
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return False
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def get_paired_images(w,h,mapfile):
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tmp_map = 'tmp_map.xml'
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m = mapnik2.Map(w,h)
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mapnik2.load_map(m,mapfile)
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i = mapnik2.Image(w,h)
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m.zoom_all()
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mapnik2.render(m,i)
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mapnik2.save_map(m,tmp_map)
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m2 = mapnik2.Map(w,h)
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mapnik2.load_map(m2,tmp_map)
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i2 = mapnik2.Image(w,h)
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m2.zoom_all()
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mapnik2.render(m2,i2)
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os.remove(tmp_map)
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return i,i2
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def test_render_from_serialization():
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i,i2 = get_paired_images(100,100,'../data/good_maps/building_symbolizer.xml')
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eq_(i.tostring(),i2.tostring())
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i,i2 = get_paired_images(100,100,'../data/good_maps/polygon_symbolizer.xml')
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eq_(i.tostring(),i2.tostring())
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def test_render_points():
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# Test for effectivenes of ticket #402 (borderline points get lost on reprojection)
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raise Todo("See: http://trac.mapnik2.org/ticket/402")
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if not mapnik2.has_pycairo(): return
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# create and populate point datasource (WGS84 lat-lon coordinates)
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places_ds = mapnik2.PointDatasource()
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places_ds.add_point(142.48,-38.38,'Name','Westernmost Point') # westernmost
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places_ds.add_point(143.10,-38.60,'Name','Southernmost Point') # southernmost
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# create layer/rule/style
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s = mapnik2.Style()
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r = mapnik2.Rule()
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symb = mapnik2.PointSymbolizer()
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symb.allow_overlap = True
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r.symbols.append(symb)
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s.rules.append(r)
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lyr = mapnik2.Layer('Places','+proj=latlon +datum=WGS84')
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lyr.datasource = places_ds
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lyr.styles.append('places_labels')
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# latlon bounding box corners
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ul_lonlat = mapnik2.Coord(142.30,-38.20)
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lr_lonlat = mapnik2.Coord(143.40,-38.80)
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# render for different projections
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projs = {
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'latlon': '+proj=latlon +datum=WGS84',
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'merc': '+proj=merc +datum=WGS84 +k=1.0 +units=m +over +no_defs',
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'google': '+proj=merc +ellps=sphere +R=6378137 +a=6378137 +units=m',
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'utm': '+proj=utm +zone=54 +datum=WGS84'
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}
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from cairo import SVGSurface
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for projdescr in projs.iterkeys():
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m = mapnik2.Map(1000, 500, projs[projdescr])
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m.append_style('places_labels',s)
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m.layers.append(lyr)
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p = mapnik2.Projection(projs[projdescr])
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m.zoom_to_box(p.forward(mapnik2.Box2d(ul_lonlat,lr_lonlat)))
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# Render to SVG so that it can be checked how many points are there with string comparison
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import StringIO
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svg_memory_file = StringIO.StringIO()
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surface = SVGSurface(svg_memory_file, m.width, m.height)
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mapnik2.render(m, surface)
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surface.flush()
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surface.finish()
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svg = svg_memory_file.getvalue()
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svg_memory_file.close()
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num_points_present = len(places_ds.all_features())
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num_points_rendered = svg.count('<image ')
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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))
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