2015-01-29 03:20:14 +01:00
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#!/usr/bin/env python
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# -*- coding: utf-8 -*-
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import os, mapnik
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from nose.tools import *
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2015-01-29 21:27:42 +01:00
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from utilities import execution_path, run_all
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2015-01-29 03:20:14 +01:00
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def setup():
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# All of the paths used are relative, if we run the tests
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# from another directory we need to chdir()
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os.chdir(execution_path('.'))
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def test_image_16_8_simple():
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im = mapnik.Image(2,2,mapnik.ImageType.gray16)
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im.set_pixel(0,0, 256)
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im.set_pixel(0,1, 999)
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im.set_pixel(1,0, 5)
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im.set_pixel(1,1, 2)
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im2 = im.cast(mapnik.ImageType.gray8)
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eq_(im2.get_pixel(0,0), 255)
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eq_(im2.get_pixel(0,1), 255)
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eq_(im2.get_pixel(1,0), 5)
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eq_(im2.get_pixel(1,1), 2)
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# Cast back!
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im = im2.cast(mapnik.ImageType.gray16)
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eq_(im.get_pixel(0,0), 255)
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eq_(im.get_pixel(0,1), 255)
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eq_(im.get_pixel(1,0), 5)
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eq_(im.get_pixel(1,1), 2)
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def test_image_32f_8_simple():
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im = mapnik.Image(2,2,mapnik.ImageType.gray32f)
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im.set_pixel(0,0, 120.1234)
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im.set_pixel(0,1, -23.4)
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im.set_pixel(1,0, 120.6)
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im.set_pixel(1,1, 360.2)
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im2 = im.cast(mapnik.ImageType.gray8)
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eq_(im2.get_pixel(0,0), 120)
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eq_(im2.get_pixel(0,1), 0)
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eq_(im2.get_pixel(1,0), 120) # Notice this is truncated!
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eq_(im2.get_pixel(1,1), 255)
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def test_image_offset_and_scale():
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im = mapnik.Image(2,2,mapnik.ImageType.gray16)
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eq_(im.offset, 0.0)
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eq_(im.scaling, 1.0)
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im.offset = 1.0
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im.scaling = 2.0
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eq_(im.offset, 1.0)
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eq_(im.scaling, 2.0)
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def test_image_16_8_scale_and_offset():
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im = mapnik.Image(2,2,mapnik.ImageType.gray16)
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im.set_pixel(0,0, 256)
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im.set_pixel(0,1, 258)
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im.set_pixel(1,0, 99999)
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im.set_pixel(1,1, 615)
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offset = 255
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scaling = 3
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im2 = im.cast(mapnik.ImageType.gray8, offset, scaling)
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eq_(im2.get_pixel(0,0), 0)
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eq_(im2.get_pixel(0,1), 1)
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eq_(im2.get_pixel(1,0), 255)
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eq_(im2.get_pixel(1,1), 120)
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# pixels will be a little off due to offsets in reverting!
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im3 = im2.cast(mapnik.ImageType.gray16)
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eq_(im3.get_pixel(0,0), 255) # Rounding error with ints
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eq_(im3.get_pixel(0,1), 258) # same
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eq_(im3.get_pixel(1,0), 1020) # The other one was way out of range for our scale/offset
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eq_(im3.get_pixel(1,1), 615) # same
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def test_image_16_32f_scale_and_offset():
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im = mapnik.Image(2,2,mapnik.ImageType.gray16)
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im.set_pixel(0,0, 256)
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im.set_pixel(0,1, 258)
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im.set_pixel(1,0, 0)
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im.set_pixel(1,1, 615)
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offset = 255
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scaling = 3.2
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im2 = im.cast(mapnik.ImageType.gray32f, offset, scaling)
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eq_(im2.get_pixel(0,0), 0.3125)
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eq_(im2.get_pixel(0,1), 0.9375)
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eq_(im2.get_pixel(1,0), -79.6875)
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eq_(im2.get_pixel(1,1), 112.5)
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im3 = im2.cast(mapnik.ImageType.gray16)
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eq_(im3.get_pixel(0,0), 256)
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eq_(im3.get_pixel(0,1), 258)
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eq_(im3.get_pixel(1,0), 0)
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eq_(im3.get_pixel(1,1), 615)
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if __name__ == "__main__":
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setup()
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exit(run_all(eval(x) for x in dir() if x.startswith("test_")))
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