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#!/usr/bin/env python
# -*- coding: utf-8 -*-
import os
import sys
from nose.tools import assert_almost_equal, eq_, raises
from nose.plugins.skip import SkipTest
import mapnik
from .utilities import READ_FLAGS, execution_path, get_unique_colors, run_all
PYTHON3 = sys.version_info[0] == 3
if PYTHON3:
buffer = memoryview
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('.'))
def test_type():
im = mapnik.Image(256, 256)
eq_(im.get_type(), mapnik.ImageType.rgba8)
im = mapnik.Image(256, 256, mapnik.ImageType.gray8)
eq_(im.get_type(), mapnik.ImageType.gray8)
def test_image_premultiply():
im = mapnik.Image(256, 256)
eq_(im.premultiplied(), False)
# Premultiply should return true that it worked
eq_(im.premultiply(), True)
eq_(im.premultiplied(), True)
# Premultipling again should return false as nothing should happen
eq_(im.premultiply(), False)
eq_(im.premultiplied(), True)
# Demultiply should return true that it worked
eq_(im.demultiply(), True)
eq_(im.premultiplied(), False)
# Demultiply again should not work and return false as it did nothing
eq_(im.demultiply(), False)
eq_(im.premultiplied(), False)
def test_image_premultiply_values():
im = mapnik.Image(256, 256)
im.fill(mapnik.Color(16, 33, 255, 128))
im.premultiply()
c = im.get_pixel(0, 0, True)
eq_(c.r, 8)
eq_(c.g, 17)
eq_(c.b, 128)
eq_(c.a, 128)
im.demultiply()
# Do to the nature of this operation the result will not be exactly the
# same
c = im.get_pixel(0, 0, True)
eq_(c.r, 15)
eq_(c.g, 33)
eq_(c.b, 255)
eq_(c.a, 128)
def test_apply_opacity():
im = mapnik.Image(4, 4)
im.fill(mapnik.Color(128, 128, 128, 128))
im.apply_opacity(0.75)
c = im.get_pixel(0, 0, True)
eq_(c.r, 128)
eq_(c.g, 128)
eq_(c.b, 128)
eq_(c.a, 96)
def test_background():
im = mapnik.Image(256, 256)
eq_(im.premultiplied(), False)
im.fill(mapnik.Color(32, 64, 125, 128))
eq_(im.premultiplied(), False)
c = im.get_pixel(0, 0, True)
eq_(c.get_premultiplied(), False)
eq_(c.r, 32)
eq_(c.g, 64)
eq_(c.b, 125)
eq_(c.a, 128)
# Now again with a premultiplied alpha
im.fill(mapnik.Color(32, 64, 125, 128, True))
eq_(im.premultiplied(), True)
c = im.get_pixel(0, 0, True)
eq_(c.get_premultiplied(), True)
eq_(c.r, 32)
eq_(c.g, 64)
eq_(c.b, 125)
eq_(c.a, 128)
def test_set_and_get_pixel():
# Create an image that is not premultiplied
im = mapnik.Image(256, 256)
c0 = mapnik.Color(16, 33, 255, 128)
c0_pre = mapnik.Color(16, 33, 255, 128, True)
im.set_pixel(0, 0, c0)
im.set_pixel(1, 1, c0_pre)
# No differences for non premultiplied pixels
c1_int = mapnik.Color(im.get_pixel(0, 0))
eq_(c0.r, c1_int.r)
eq_(c0.g, c1_int.g)
eq_(c0.b, c1_int.b)
eq_(c0.a, c1_int.a)
c1 = im.get_pixel(0, 0, True)
eq_(c0.r, c1.r)
eq_(c0.g, c1.g)
eq_(c0.b, c1.b)
eq_(c0.a, c1.a)
# The premultiplied Color should be demultiplied before being applied.
c0_pre.demultiply()
c1_int = mapnik.Color(im.get_pixel(1, 1))
eq_(c0_pre.r, c1_int.r)
eq_(c0_pre.g, c1_int.g)
eq_(c0_pre.b, c1_int.b)
eq_(c0_pre.a, c1_int.a)
c1 = im.get_pixel(1, 1, True)
eq_(c0_pre.r, c1.r)
eq_(c0_pre.g, c1.g)
eq_(c0_pre.b, c1.b)
eq_(c0_pre.a, c1.a)
# Now create a new image that is premultiplied
im = mapnik.Image(256, 256, mapnik.ImageType.rgba8, True, True)
c0 = mapnik.Color(16, 33, 255, 128)
c0_pre = mapnik.Color(16, 33, 255, 128, True)
im.set_pixel(0, 0, c0)
im.set_pixel(1, 1, c0_pre)
# It should have put pixels that are the same as premultiplied so
# premultiply c0
c0.premultiply()
c1_int = mapnik.Color(im.get_pixel(0, 0))
eq_(c0.r, c1_int.r)
eq_(c0.g, c1_int.g)
eq_(c0.b, c1_int.b)
eq_(c0.a, c1_int.a)
c1 = im.get_pixel(0, 0, True)
eq_(c0.r, c1.r)
eq_(c0.g, c1.g)
eq_(c0.b, c1.b)
eq_(c0.a, c1.a)
# The premultiplied Color should be the same though
c1_int = mapnik.Color(im.get_pixel(1, 1))
eq_(c0_pre.r, c1_int.r)
eq_(c0_pre.g, c1_int.g)
eq_(c0_pre.b, c1_int.b)
eq_(c0_pre.a, c1_int.a)
c1 = im.get_pixel(1, 1, True)
eq_(c0_pre.r, c1.r)
eq_(c0_pre.g, c1.g)
eq_(c0_pre.b, c1.b)
eq_(c0_pre.a, c1.a)
def test_pixel_gray8():
im = mapnik.Image(4, 4, mapnik.ImageType.gray8)
val_list = range(20)
for v in val_list:
im.set_pixel(0, 0, v)
eq_(im.get_pixel(0, 0), v)
im.set_pixel(0, 0, -v)
eq_(im.get_pixel(0, 0), 0)
def test_pixel_gray8s():
im = mapnik.Image(4, 4, mapnik.ImageType.gray8s)
val_list = range(20)
for v in val_list:
im.set_pixel(0, 0, v)
eq_(im.get_pixel(0, 0), v)
im.set_pixel(0, 0, -v)
eq_(im.get_pixel(0, 0), -v)
def test_pixel_gray16():
im = mapnik.Image(4, 4, mapnik.ImageType.gray16)
val_list = range(20)
for v in val_list:
im.set_pixel(0, 0, v)
eq_(im.get_pixel(0, 0), v)
im.set_pixel(0, 0, -v)
eq_(im.get_pixel(0, 0), 0)
def test_pixel_gray16s():
im = mapnik.Image(4, 4, mapnik.ImageType.gray16s)
val_list = range(20)
for v in val_list:
im.set_pixel(0, 0, v)
eq_(im.get_pixel(0, 0), v)
im.set_pixel(0, 0, -v)
eq_(im.get_pixel(0, 0), -v)
def test_pixel_gray32():
im = mapnik.Image(4, 4, mapnik.ImageType.gray32)
val_list = range(20)
for v in val_list:
im.set_pixel(0, 0, v)
eq_(im.get_pixel(0, 0), v)
im.set_pixel(0, 0, -v)
eq_(im.get_pixel(0, 0), 0)
def test_pixel_gray32s():
im = mapnik.Image(4, 4, mapnik.ImageType.gray32s)
val_list = range(20)
for v in val_list:
im.set_pixel(0, 0, v)
eq_(im.get_pixel(0, 0), v)
im.set_pixel(0, 0, -v)
eq_(im.get_pixel(0, 0), -v)
def test_pixel_gray64():
im = mapnik.Image(4, 4, mapnik.ImageType.gray64)
val_list = range(20)
for v in val_list:
im.set_pixel(0, 0, v)
eq_(im.get_pixel(0, 0), v)
im.set_pixel(0, 0, -v)
eq_(im.get_pixel(0, 0), 0)
def test_pixel_gray64s():
im = mapnik.Image(4, 4, mapnik.ImageType.gray64s)
val_list = range(20)
for v in val_list:
im.set_pixel(0, 0, v)
eq_(im.get_pixel(0, 0), v)
im.set_pixel(0, 0, -v)
eq_(im.get_pixel(0, 0), -v)
def test_pixel_floats():
im = mapnik.Image(4, 4, mapnik.ImageType.gray32f)
val_list = [0.9, 0.99, 0.999, 0.9999, 0.99999, 1, 1.0001, 1.001, 1.01, 1.1]
for v in val_list:
im.set_pixel(0, 0, v)
assert_almost_equal(im.get_pixel(0, 0), v)
im.set_pixel(0, 0, -v)
assert_almost_equal(im.get_pixel(0, 0), -v)
def test_pixel_doubles():
im = mapnik.Image(4, 4, mapnik.ImageType.gray64f)
val_list = [0.9, 0.99, 0.999, 0.9999, 0.99999, 1, 1.0001, 1.001, 1.01, 1.1]
for v in val_list:
im.set_pixel(0, 0, v)
assert_almost_equal(im.get_pixel(0, 0), v)
im.set_pixel(0, 0, -v)
assert_almost_equal(im.get_pixel(0, 0), -v)
def test_pixel_overflow():
im = mapnik.Image(4, 4, mapnik.ImageType.gray8)
im.set_pixel(0, 0, 256)
eq_(im.get_pixel(0, 0), 255)
def test_pixel_underflow():
im = mapnik.Image(4, 4, mapnik.ImageType.gray8)
im.set_pixel(0, 0, -1)
eq_(im.get_pixel(0, 0), 0)
im = mapnik.Image(4, 4, mapnik.ImageType.gray16)
im.set_pixel(0, 0, -1)
eq_(im.get_pixel(0, 0), 0)
@raises(IndexError)
def test_set_pixel_out_of_range_1():
im = mapnik.Image(4, 4)
c = mapnik.Color('blue')
im.set_pixel(5, 5, c)
@raises(OverflowError)
def test_set_pixel_out_of_range_2():
im = mapnik.Image(4, 4)
c = mapnik.Color('blue')
im.set_pixel(-1, 1, c)
@raises(IndexError)
def test_get_pixel_out_of_range_1():
im = mapnik.Image(4, 4)
c = im.get_pixel(5, 5)
@raises(OverflowError)
def test_get_pixel_out_of_range_2():
im = mapnik.Image(4, 4)
c = im.get_pixel(-1, 1)
@raises(IndexError)
def test_get_pixel_color_out_of_range_1():
im = mapnik.Image(4, 4)
c = im.get_pixel(5, 5, True)
@raises(OverflowError)
def test_get_pixel_color_out_of_range_2():
im = mapnik.Image(4, 4)
c = im.get_pixel(-1, 1, True)
def test_set_color_to_alpha():
im = mapnik.Image(256, 256)
im.fill(mapnik.Color('rgba(12,12,12,255)'))
eq_(get_unique_colors(im), ['rgba(12,12,12,255)'])
im.set_color_to_alpha(mapnik.Color('rgba(12,12,12,0)'))
eq_(get_unique_colors(im), ['rgba(0,0,0,0)'])
@raises(RuntimeError)
def test_negative_image_dimensions():
# TODO - this may have regressed in
# https://github.com/mapnik/mapnik/commit/4f3521ac24b61fc8ae8fd344a16dc3a5fdf15af7
im = mapnik.Image(-40, 40)
# should not get here
eq_(im.width(), 0)
eq_(im.height(), 0)
def test_jpeg_round_trip():
filepath = '/tmp/mapnik-jpeg-io.jpeg'
im = mapnik.Image(255, 267)
im.fill(mapnik.Color('rgba(1,2,3,.5)'))
im.save(filepath, 'jpeg')
im2 = mapnik.Image.open(filepath)
with open(filepath, READ_FLAGS) as f:
im3 = mapnik.Image.fromstring(f.read())
eq_(im.width(), im2.width())
eq_(im.height(), im2.height())
eq_(im.width(), im3.width())
eq_(im.height(), im3.height())
eq_(len(im.tostring()), len(im2.tostring()))
eq_(len(im.tostring('jpeg')), len(im2.tostring('jpeg')))
eq_(len(im.tostring()), len(im3.tostring()))
eq_(len(im.tostring('jpeg')), len(im3.tostring('jpeg')))
def test_png_round_trip():
filepath = '/tmp/mapnik-png-io.png'
im = mapnik.Image(255, 267)
im.fill(mapnik.Color('rgba(1,2,3,.5)'))
im.save(filepath, 'png')
im2 = mapnik.Image.open(filepath)
with open(filepath, READ_FLAGS) as f:
im3 = mapnik.Image.fromstring(f.read())
eq_(im.width(), im2.width())
eq_(im.height(), im2.height())
eq_(im.width(), im3.width())
eq_(im.height(), im3.height())
eq_(len(im.tostring()), len(im2.tostring()))
eq_(len(im.tostring('png')), len(im2.tostring('png')))
eq_(len(im.tostring('png8')), len(im2.tostring('png8')))
eq_(len(im.tostring()), len(im3.tostring()))
eq_(len(im.tostring('png')), len(im3.tostring('png')))
eq_(len(im.tostring('png8')), len(im3.tostring('png8')))
def test_image_open_from_string():
if not os.path.exists('../data/images/dummy.png'):
raise SkipTest
filepath = '../data/images/dummy.png'
im1 = mapnik.Image.open(filepath)
with open(filepath, READ_FLAGS) as f:
im2 = mapnik.Image.fromstring(f.read())
eq_(im1.width(), im2.width())
length = len(im1.tostring())
eq_(length, len(im2.tostring()))
eq_(len(mapnik.Image.fromstring(im1.tostring('png')).tostring()), length)
eq_(len(mapnik.Image.fromstring(im1.tostring('jpeg')).tostring()), length)
eq_(len(mapnik.Image.frombuffer(buffer(im1.tostring('png'))).tostring()), length)
eq_(len(mapnik.Image.frombuffer(buffer(im1.tostring('jpeg'))).tostring()), length)
# TODO - https://github.com/mapnik/mapnik/issues/1831
eq_(len(mapnik.Image.fromstring(im1.tostring('tiff')).tostring()), length)
eq_(len(mapnik.Image.frombuffer(buffer(im1.tostring('tiff'))).tostring()), length)
if __name__ == "__main__":
setup()
exit(run_all(eval(x) for x in dir() if x.startswith("test_")))
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