mapnik/tests/visual_tests/test.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-

import mapnik
import cairo
import sys
import os.path
from compare import compare, summary

dirname = os.path.dirname(sys.argv[0])
files = [
    ("list", 800, 600, 400, 300, 250, 200, 150, 100),
    ("simple", 800, 600, 400, 300, 250, 200, 150, 100),
    ("lines-1", (800, 800), (600, 600), (400, 400), (200, 200)),
    ("lines-2", (800, 800), (600, 600), (400, 400), (200, 200)),
    ("lines-3", (800, 800), (600, 600), (400, 400), (200, 200)),
    ("lines-shield", (800, 800), (600, 600), (400, 400), (200, 200)),
    ("simple-E", 500),
    ("simple-NE", 500),
    ("simple-NW", 500),
    ("simple-N", 500),
    ("simple-SE", 500),
    ("simple-SW", 500),
    ("simple-S", 500),
    ("simple-W", 500),
    ("formating-1", 500),
    ("formating-2", 500),
    ("formating-3", 500),
    ("formating-4", 500),
    ("shieldsymbolizer-1", 490, 495, 497, 498, 499, 500, 501, 502, 505, 510),
    ("expressionformat", 500)]

def render(filename, width, height=100):
    print "-"*80
    print "Rendering style \"%s\" with size %dx%d ... " % (filename, width, height)
    print "-"*80
    width = int(width)
    height = int(height)
    m = mapnik.Map(width, height)
    mapnik.load_map(m, os.path.join(dirname, "%s.xml" % filename), False)
    bbox = mapnik.Box2d(-0.05, -0.01, 0.95, 0.01)
    m.zoom_to_box(bbox)
    basefn = '%s-%d' % (filename, width)
    mapnik.render_to_file(m, basefn+'-agg.png')
    diff = compare(basefn + '-agg.png', basefn + '-reference.png')
    if diff > 0:
        print "-"*80
        print 'Error: %u different pixels' % diff
        print "-"*80

    return m

if len(sys.argv) == 2:
    files = [(sys.argv[1], 500)]
elif len(sys.argv) > 2:
    files = [sys.argv[1:]]

for f in files:
    for width in f[1:]:
        if isinstance(width, tuple):
            m = render(f[0], width[0], width[1])
        else:
            m = render(f[0], width)
    mapnik.save_map(m, "%s-out.xml" % f[0])

summary()