def test_render_points():
# Test for effectivenes of ticket #402 (borderline points get lost on reprojection)
raise Todo("See: http://trac.mapnik2.org/ticket/402")
if not mapnik2.has_pycairo():
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",
}
from cairo import SVGSurface
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
import StringIO
svg_memory_file = StringIO.StringIO()
surface = SVGSurface(svg_memory_file, m.width, m.height)
mapnik2.render(m, surface)
surface.flush()
surface.finish()
svg = svg_memory_file.getvalue()
svg_memory_file.close()
num_points_present = len(places_ds.all_features())
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),
)
def test_render_points():
# Test for effectivenes of ticket #402 (borderline points get lost on reprojection)
raise Todo("See: http://trac.mapnik2.org/ticket/402")
if not mapnik2.has_pycairo(): 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'
}
from cairo import SVGSurface
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
import StringIO
svg_memory_file = StringIO.StringIO()
surface = SVGSurface(svg_memory_file, m.width, m.height)
mapnik2.render(m, surface)
surface.flush()
surface.finish()
svg = svg_memory_file.getvalue()
svg_memory_file.close()
num_points_present = len(places_ds.all_features())
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))
def _pycairo_surface(type,sym):
if mapnik2.has_pycairo():
import cairo
test_cairo_file = 'test.%s' % type
m = mapnik2.Map(256,256)
mapnik2.load_map(m,'../data/good_maps/%s_symbolizer.xml' % sym)
surface = getattr(cairo,'%sSurface' % type.upper())(test_cairo_file, m.width,m.height)
mapnik2.render(m, surface)
surface.finish()
if os.path.exists(test_cairo_file):
os.remove(test_cairo_file)
return True
else:
# Fail, the file wasn't written
return False
def _pycairo_surface(type, sym):
if mapnik2.has_pycairo():
import cairo
test_cairo_file = 'test.%s' % type
m = mapnik2.Map(256, 256)
mapnik2.load_map(m, '../data/good_maps/%s_symbolizer.xml' % sym)
surface = getattr(cairo, '%sSurface' % type.upper())(test_cairo_file,
m.width, m.height)
mapnik2.render(m, surface)
surface.finish()
if os.path.exists(test_cairo_file):
os.remove(test_cairo_file)
return True
else:
# Fail, the file wasn't written
return False
def test_renders_with_cairo():
if not mapnik2.has_pycairo():
return
sym = mapnik2.GlyphSymbolizer("DejaVu Sans Condensed",
mapnik2.Expression("'í'"))
sym.allow_overlap = True
sym.angle = mapnik2.Expression("[azimuth]+90") #+90 so the top of the glyph points upwards
sym.size = mapnik2.Expression("[value]")
sym.color = mapnik2.Expression("'#ff0000'")
_map = create_map_and_append_symbolyzer(sym)
from cStringIO import StringIO
import cairo
surface = cairo.ImageSurface(cairo.FORMAT_ARGB32, 256, 256)
mapnik2.render(_map, surface)
im = mapnik2.Image.from_cairo(surface)
save_data('cairo_glyph_symbolizer.png', im.tostring('png'))
assert contains_word('\xff\x00\x00\xff', im.tostring())
def test_renders_with_cairo():
if not mapnik2.has_pycairo():
return
sym = mapnik2.GlyphSymbolizer("DejaVu Sans Condensed",
mapnik2.Expression("'í'"))
sym.allow_overlap = True
sym.angle = mapnik2.Expression(
"[azimuth]+90") #+90 so the top of the glyph points upwards
sym.size = mapnik2.Expression("[value]")
sym.color = mapnik2.Expression("'#ff0000'")
_map = create_map_and_append_symbolyzer(sym)
from cStringIO import StringIO
import cairo
surface = cairo.ImageSurface(cairo.FORMAT_ARGB32, 256, 256)
mapnik2.render(_map, surface)
im = mapnik2.Image.from_cairo(surface)
save_data('cairo_glyph_symbolizer.png', im.tostring('png'))
assert contains_word('\xff\x00\x00\xff', im.tostring())
images_.append('demo256.png')
im.save('demo64_binary_transparency.png', 'png8:c=64:t=1')
images_.append('demo64_binary_transparency.png')
im.save('demo128_colors_hextree_no_alpha.png', 'png8:c=100:m=h:t=0')
images_.append('demo128_colors_hextree_no_alpha.png')
im.save('demo_high.jpg', 'jpeg100')
images_.append('demo_high.jpg')
im.save('demo_low.jpg', 'jpeg50')
images_.append('demo_low.jpg')
# Render cairo examples
if HAS_PYCAIRO_MODULE and mapnik2.has_pycairo():
svg_surface = cairo.SVGSurface('demo.svg', m.width,m.height)
mapnik2.render(m, svg_surface)
svg_surface.finish()
images_.append('demo.svg')
pdf_surface = cairo.PDFSurface('demo.pdf', m.width,m.height)
mapnik2.render(m, pdf_surface)
images_.append('demo.pdf')
pdf_surface.finish()
postscript_surface = cairo.PSSurface('demo.ps', m.width,m.height)
mapnik2.render(m, postscript_surface)
images_.append('demo.ps')
postscript_surface.finish()
images_.append('demo256.png')
im.save('demo64_binary_transparency.png', 'png8:c=64:t=1')
images_.append('demo64_binary_transparency.png')
im.save('demo128_colors_hextree_no_alpha.png', 'png8:c=100:m=h:t=0')
images_.append('demo128_colors_hextree_no_alpha.png')
im.save('demo_high.jpg', 'jpeg100')
images_.append('demo_high.jpg')
im.save('demo_low.jpg', 'jpeg50')
images_.append('demo_low.jpg')
# Render cairo examples
if HAS_PYCAIRO_MODULE and mapnik2.has_pycairo():
svg_surface = cairo.SVGSurface('demo.svg', m.width, m.height)
mapnik2.render(m, svg_surface)
svg_surface.finish()
images_.append('demo.svg')
pdf_surface = cairo.PDFSurface('demo.pdf', m.width, m.height)
mapnik2.render(m, pdf_surface)
images_.append('demo.pdf')
pdf_surface.finish()
postscript_surface = cairo.PSSurface('demo.ps', m.width, m.height)
mapnik2.render(m, postscript_surface)
images_.append('demo.ps')
postscript_surface.finish()
