79 lines
2.6 KiB
Python
79 lines
2.6 KiB
Python
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#!/usr/bin/env python
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# -*- coding: utf-8 -*-
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import sys
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import os, mapnik
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from timeit import Timer, time
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from nose.tools import *
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from utilities import execution_path
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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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tmp_dir = '/tmp/mapnik-png/'
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if not os.path.exists(tmp_dir):
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os.makedirs(tmp_dir)
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def test_transparency_levels():
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# create partial transparency image
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im = mapnik.Image(256,256)
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im.background = mapnik.Color('rgba(255,255,255,.5)')
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c2 = mapnik.Color('rgba(255,255,0,.2)')
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c3 = mapnik.Color('rgb(0,255,255)')
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for y in range(0,im.height()/2):
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for x in range(0,im.width()/2):
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im.set_pixel(x,y,c2)
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for y in range(im.height()/2,im.height()):
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for x in range(im.width()/2,im.width()):
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im.set_pixel(x,y,c3)
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t0 = tmp_dir + 'white0.png'
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t2 = tmp_dir + 'white2.png'
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t1 = tmp_dir + 'white1.png'
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# octree
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format = 'png8:m=o:t=0'
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im.save(t0,format)
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im_in = mapnik.Image.open(t0)
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t0_len = len(im_in.tostring(format))
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eq_(t0_len,len(mapnik.Image.open('images/support/transparency/white0.png').tostring(format)))
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format = 'png8:m=o:t=1'
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im.save(t1,format)
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im_in = mapnik.Image.open(t1)
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t1_len = len(im_in.tostring(format))
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eq_(len(im.tostring(format)),len(mapnik.Image.open('images/support/transparency/white1.png').tostring(format)))
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format = 'png8:m=o:t=2'
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im.save(t2,format)
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im_in = mapnik.Image.open(t2)
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t2_len = len(im_in.tostring(format))
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eq_(len(im.tostring(format)),len(mapnik.Image.open('images/support/transparency/white2.png').tostring(format)))
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eq_(t0_len < t1_len < t2_len,True)
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# hextree
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format = 'png8:m=h:t=0'
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im.save(t0,format)
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im_in = mapnik.Image.open(t0)
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t0_len = len(im_in.tostring(format))
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eq_(t0_len,len(mapnik.Image.open('images/support/transparency/white0.png').tostring(format)))
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format = 'png8:m=h:t=1'
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im.save(t1,format)
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im_in = mapnik.Image.open(t1)
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t1_len = len(im_in.tostring(format))
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eq_(len(im.tostring(format)),len(mapnik.Image.open('images/support/transparency/white1.png').tostring(format)))
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format = 'png8:m=h:t=2'
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im.save(t2,format)
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im_in = mapnik.Image.open(t2)
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t2_len = len(im_in.tostring(format))
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eq_(len(im.tostring(format)),len(mapnik.Image.open('images/support/transparency/white2.png').tostring(format)))
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eq_(t0_len < t1_len < t2_len,True)
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if __name__ == "__main__":
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setup()
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for t in dir():
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if 'test_' in t:
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eval(t)()
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