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import os
import mapnik
import pytest
from .utilities import execution_path
@pytest.fixture(scope="module")
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('.'))
yield
if mapnik.has_png():
tmp_dir = '/tmp/mapnik-png/'
if not os.path.exists(tmp_dir):
os.makedirs(tmp_dir)
opts = [
'png32',
'png32:t=0',
'png8:m=o',
'png8:m=o:c=1',
'png8:m=o:t=0',
'png8:m=o:c=1:t=0',
'png8:m=o:t=1',
'png8:m=o:t=2',
'png8:m=h',
'png8:m=h:c=1',
'png8:m=h:t=0',
'png8:m=h:c=1:t=0',
'png8:m=h:t=1',
'png8:m=h:t=2'
]
# Todo - use itertools.product
#z_opts = range(1,9+1)
#t_opts = range(0,2+1)
def gen_filepath(name, format):
return os.path.join('images/support/encoding-opts',
name + '-' + format.replace(":", "+") + '.png')
generate = os.environ.get('UPDATE')
@pytest.mark.xfail(strict=False, reason="Fails on big-endian")
def test_expected_encodings(setup):
# blank image
im = mapnik.Image(256, 256)
for opt in opts:
expected = gen_filepath('solid', opt)
actual = os.path.join(tmp_dir, os.path.basename(expected))
if generate or not os.path.exists(expected):
print('generating expected image %s' % expected)
im.save(expected, opt)
else:
im.save(actual, opt)
assert mapnik.Image.open(actual).tostring('png32') == mapnik.Image.open(expected).tostring('png32'), '%s (actual) not == to %s (expected)' % (actual, expected)
# solid image
im.fill(mapnik.Color('green'))
for opt in opts:
expected = gen_filepath('blank', opt)
actual = os.path.join(tmp_dir, os.path.basename(expected))
if generate or not os.path.exists(expected):
print('generating expected image %s' % expected)
im.save(expected, opt)
else:
im.save(actual, opt)
assert mapnik.Image.open(actual).tostring('png32') == mapnik.Image.open(expected).tostring('png32'), '%s (actual) not == to %s (expected)' % (actual, expected)
# aerial
im = mapnik.Image.open('./images/support/transparency/aerial_rgba.png')
for opt in opts:
expected = gen_filepath('aerial_rgba', opt)
actual = os.path.join(tmp_dir, os.path.basename(expected))
if generate or not os.path.exists(expected):
print('generating expected image %s' % expected)
im.save(expected, opt)
else:
im.save(actual, opt)
assert mapnik.Image.open(actual).tostring('png32') == mapnik.Image.open(expected).tostring('png32'), '%s (actual) not == to %s (expected)' % (actual, expected)
@pytest.mark.xfail(strict=False, reason="Fails on big-endian")
def test_transparency_levels():
# create partial transparency image
im = mapnik.Image(256, 256)
im.fill(mapnik.Color('rgba(255,255,255,.5)'))
c2 = mapnik.Color('rgba(255,255,0,.2)')
c3 = mapnik.Color('rgb(0,255,255)')
for y in range(0, int(im.height() / 2)):
for x in range(0, int(im.width() / 2)):
im.set_pixel(x, y, c2)
for y in range(int(im.height() / 2), im.height()):
for x in range(int(im.width() / 2), im.width()):
im.set_pixel(x, y, c3)
t0 = tmp_dir + 'white0.png'
t2 = tmp_dir + 'white2.png'
t1 = tmp_dir + 'white1.png'
# octree
format = 'png8:m=o:t=0'
im.save(t0, format)
im_in = mapnik.Image.open(t0)
t0_len = len(im_in.tostring(format))
assert t0_len == len(mapnik.Image.open('images/support/transparency/white0.png').tostring(format))
format = 'png8:m=o:t=1'
im.save(t1, format)
im_in = mapnik.Image.open(t1)
t1_len = len(im_in.tostring(format))
assert len(im.tostring(format)) == len(mapnik.Image.open('images/support/transparency/white1.png').tostring(format))
format = 'png8:m=o:t=2'
im.save(t2, format)
im_in = mapnik.Image.open(t2)
t2_len = len(im_in.tostring(format))
assert len(im.tostring(format)) == len(mapnik.Image.open('images/support/transparency/white2.png').tostring(format))
assert t0_len < t1_len < t2_len
# hextree
format = 'png8:m=h:t=0'
im.save(t0, format)
im_in = mapnik.Image.open(t0)
t0_len = len(im_in.tostring(format))
assert t0_len == len(mapnik.Image.open('images/support/transparency/white0.png').tostring(format))
format = 'png8:m=h:t=1'
im.save(t1, format)
im_in = mapnik.Image.open(t1)
t1_len = len(im_in.tostring(format))
assert len(im.tostring(format)) == len(mapnik.Image.open('images/support/transparency/white1.png').tostring(format))
format = 'png8:m=h:t=2'
im.save(t2, format)
im_in = mapnik.Image.open(t2)
t2_len = len(im_in.tostring(format))
assert len(im.tostring(format)) == len(mapnik.Image.open('images/support/transparency/white2.png').tostring(format))
assert t0_len < t1_len < t2_len
def test_transparency_levels_aerial():
if not os.path.exists('../data/images/12_654_1580.png'):
pytest.skip('Missing data')
im = mapnik.Image.open('../data/images/12_654_1580.png')
im_in = mapnik.Image.open(
'./images/support/transparency/aerial_rgba.png')
assert len(im.tostring('png8')) == len(im_in.tostring('png8'))
assert len(im.tostring('png32')) == len(im_in.tostring('png32'))
im_in = mapnik.Image.open(
'./images/support/transparency/aerial_rgb.png')
assert len(im.tostring('png32')) == len(im_in.tostring('png32'))
assert len(im.tostring('png32:t=0')) == len(im_in.tostring('png32:t=0'))
assert not len(im.tostring('png32:t=0')) == len(im_in.tostring('png32'))
assert len(im.tostring('png8')) == len(im_in.tostring('png8'))
assert len(im.tostring('png8:t=0')) == len(im_in.tostring('png8:t=0'))
# unlike png32 paletted images without alpha will look the same even if
# no alpha is forced
assert len(im.tostring('png8:t=0')) == len(im_in.tostring('png8'))
assert len(im.tostring('png8:t=0:m=o')) == len(im_in.tostring('png8:m=o'))
@pytest.mark.xfail(strict=False, reason="Fails on big-endian")
def test_9_colors_hextree():
expected = './images/support/encoding-opts/png8-9cols.png'
im = mapnik.Image.open(expected)
t0 = tmp_dir + 'png-encoding-9-colors.result-hextree.png'
im.save(t0, 'png8:m=h')
assert mapnik.Image.open(t0).tostring() == mapnik.Image.open(expected).tostring(), '%s (actual) not == to %s (expected)' % (t0, expected)
@pytest.mark.xfail(strict=False, reason="Fails on big-endian")
def test_9_colors_octree():
expected = './images/support/encoding-opts/png8-9cols.png'
im = mapnik.Image.open(expected)
t0 = tmp_dir + 'png-encoding-9-colors.result-octree.png'
im.save(t0, 'png8:m=o')
assert mapnik.Image.open(t0).tostring() == mapnik.Image.open(expected).tostring(), '%s (actual) not == to %s (expected)' % (t0, expected)
@pytest.mark.xfail(strict=False, reason="Fails on big-endian")
def test_17_colors_hextree():
expected = './images/support/encoding-opts/png8-17cols.png'
im = mapnik.Image.open(expected)
t0 = tmp_dir + 'png-encoding-17-colors.result-hextree.png'
im.save(t0, 'png8:m=h')
assert mapnik.Image.open(t0).tostring() == mapnik.Image.open(expected).tostring(), '%s (actual) not == to %s (expected)' % (t0, expected)
@pytest.mark.xfail(strict=False, reason="Fails on big-endian")
def test_17_colors_octree():
expected = './images/support/encoding-opts/png8-17cols.png'
im = mapnik.Image.open(expected)
t0 = tmp_dir + 'png-encoding-17-colors.result-octree.png'
im.save(t0, 'png8:m=o')
assert mapnik.Image.open(t0).tostring() == mapnik.Image.open(expected).tostring(), '%s (actual) not == to %s (expected)' % (t0, expected)
@pytest.mark.xfail(strict=False, reason="Fails on big-endian")
def test_2px_regression_hextree():
im = mapnik.Image.open('./images/support/encoding-opts/png8-2px.A.png')
expected = './images/support/encoding-opts/png8-2px.png'
t0 = tmp_dir + 'png-encoding-2px.result-hextree.png'
im.save(t0, 'png8:m=h')
assert mapnik.Image.open(t0).tostring() == mapnik.Image.open(expected).tostring(), '%s (actual) not == to %s (expected)' % (t0, expected)
@pytest.mark.xfail(strict=False, reason="Fails on big-endian")
def test_2px_regression_octree():
im = mapnik.Image.open('./images/support/encoding-opts/png8-2px.A.png')
expected = './images/support/encoding-opts/png8-2px.png'
t0 = tmp_dir + 'png-encoding-2px.result-octree.png'
im.save(t0, 'png8:m=o')
assert mapnik.Image.open(t0).tostring() == mapnik.Image.open(expected).tostring(), '%s (actual) not == to %s (expected)' % (t0, expected)
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