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Copy pathwebp_encoding_test.py
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177 lines (159 loc) · 6.85 KB
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import mapnik
import os
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_webp():
tmp_dir = '/tmp/mapnik-webp/'
if not os.path.exists(tmp_dir):
os.makedirs(tmp_dir)
opts = [
'webp',
'webp:method=0',
'webp:method=6',
'webp:quality=64',
'webp:alpha=false',
'webp:partitions=3',
'webp:preprocessing=1',
'webp:partition_limit=50',
'webp:pass=10',
'webp:alpha_quality=50',
'webp:alpha_filtering=2',
'webp:alpha_compression=0',
'webp:autofilter=0',
'webp:filter_type=1:autofilter=1',
'webp:filter_sharpness=4',
'webp:filter_strength=50',
'webp:sns_strength=50',
'webp:segments=3',
'webp:target_PSNR=.5',
'webp:target_size=100'
]
def gen_filepath(name, format):
return os.path.join('images/support/encoding-opts',
name + '-' + format.replace(":", "+") + '.webp')
def test_quality_threshold(setup):
im = mapnik.Image(256, 256)
im.to_string('webp:quality=99.99000')
im.to_string('webp:quality=0')
im.to_string('webp:quality=0.001')
def test_quality_threshold_invalid():
im = mapnik.Image(256, 256)
with pytest.raises(RuntimeError):
im.to_string('webp:quality=101')
def test_quality_threshold_invalid2():
im = mapnik.Image(256, 256)
with pytest.raises(RuntimeError):
im.to_string('webp:quality=-1')
def test_quality_threshold_invalid3():
im = mapnik.Image(256, 256)
with pytest.raises(RuntimeError):
im.to_string('webp:quality=101.1')
generate = os.environ.get('UPDATE')
def test_expected_encodings():
fails = []
try:
for opt in opts:
im = mapnik.Image(256, 256)
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', expected)
im.save(expected, opt)
im.save(actual, opt)
try:
expected_bytes = mapnik.Image.open(expected).to_string()
except RuntimeError:
# this will happen if libweb is old, since it cannot open
# images created by more recent webp
print(
'warning, cannot open webp expected image (your libwebp is likely too old)')
continue
if mapnik.Image.open(actual).to_string() != expected_bytes:
fails.append(
'%s (actual) not == to %s (expected)' %
(actual, expected))
for opt in opts:
im = mapnik.Image(256, 256)
im.fill(mapnik.Color('green'))
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', expected)
im.save(expected, opt)
im.save(actual, opt)
try:
expected_bytes = mapnik.Image.open(expected).to_string()
except RuntimeError:
# this will happen if libweb is old, since it cannot open
# images created by more recent webp
print(
'warning, cannot open webp expected image (your libwebp is likely too old)')
continue
if mapnik.Image.open(actual).to_string() != expected_bytes:
fails.append(
'%s (actual) not == to %s (expected)' %
(actual, expected))
for opt in opts:
im = mapnik.Image.open(
'images/support/transparency/aerial_rgba.png')
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', expected)
im.save(expected, opt)
im.save(actual, opt)
try:
expected_bytes = mapnik.Image.open(expected).to_string()
except RuntimeError:
# this will happen if libweb is old, since it cannot open
# images created by more recent webp
print(
'warning, cannot open webp expected image (your libwebp is likely too old)')
continue
if mapnik.Image.open(actual).to_string() != expected_bytes:
fails.append(
'%s (actual) not == to %s (expected)' %
(actual, expected))
# disabled to avoid failures on ubuntu when using old webp packages
# assert fails,[] == '\n'+'\n'.join(fails)
except RuntimeError as e:
print(e)
def test_transparency_levels():
try:
# 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-actual.webp'
# octree
format = 'webp'
expected = 'images/support/transparency/white0.webp'
if generate or not os.path.exists(expected):
im.save('images/support/transparency/white0.webp')
im.save(t0, format)
im_in = mapnik.Image.open(t0)
t0_len = len(im_in.to_string(format))
try:
expected_bytes = mapnik.Image.open(expected).to_string(format)
except RuntimeError:
# this will happen if libweb is old, since it cannot open
# images created by more recent webp
print(
'warning, cannot open webp expected image (your libwebp is likely too old)')
return
assert t0_len == len(expected_bytes)
except RuntimeError as e:
print(e)