def test_gradient_0(self):
# Empty
colors = ColorGradient()
self.assertEqual(colors._clauses(band='r'),
[])
self.assertEqual(colors._clauses(band='a'),
[])
self.assertEqual(colors._expression(band='r'),
None)
self.assertEqual(colors._expression(band='a'),
None)
# Empty, with nodata - no-op
self.assertEqual(colors._clauses(band='r', nodata=0),
[])
self.assertEqual(colors._clauses(band='a', nodata=0),
[])
self.assertEqual(colors._expression(band='r', nodata=0),
None)
self.assertEqual(colors._expression(band='a', nodata=0),
None)
def test_gradient_0(self):
# Empty
colors = ColorGradient()
self.assertEqual(colors._clauses(band='r'), [])
self.assertEqual(colors._clauses(band='a'), [])
self.assertEqual(colors._expression(band='r'), None)
self.assertEqual(colors._expression(band='a'), None)
# Empty, with nodata - no-op
self.assertEqual(colors._clauses(band='r', nodata=0), [])
self.assertEqual(colors._clauses(band='a', nodata=0), [])
self.assertEqual(colors._expression(band='r', nodata=0), None)
self.assertEqual(colors._expression(band='a', nodata=0), None)
def test_gradient_3(self):
# Three colors - one gradient split in half
dark_red = rgba(127, 0, 0, 255)
colors = ColorGradient({0: self.red, 128: dark_red, 255: self.black})
self.assertEqual(
colors._clauses(band='r'),
[('n >= 0', '-1.0 * n + {0}'.format(float(self.red.r))),
('n >= 255', self.black.r)])
self.assertEqual(colors._clauses(band='g'), [])
self.assertEqual(colors._clauses(band='a'), [('n >= 0', self.red.a)])
self.assertEqual(
colors._expression(band='r'), 'where(n >= 255, {black}, '
'where(n >= 0, -1.0 * n + {red}, {false}))'.format(
black=self.black.r,
red=float(self.red.r),
false=ColorGradient.BACKGROUND.r))
self.assertEqual(colors._expression(band='g'), None)
self.assertEqual(
colors._expression(band='a'),
'where(n >= 0, {red}, {false})'.format(
red=self.red.a, false=ColorGradient.BACKGROUND.a))
# Three colors - one gradient split in half
dark_red = rgba(127, 0, 0, 255)
colors = ColorGradient({0: self.red, 64: dark_red, 255: self.black})
self.assertEqual(
colors._clauses(band='r'),
[('n >= 0', '-0.5 * n + {0}'.format(float(self.red.r))),
('n >= 64', '-1.5039370078740157 * n + 223.251968503937'),
('n >= 255', self.black.r)])
self.assertEqual(colors._clauses(band='g'), [])
self.assertEqual(colors._clauses(band='a'), [('n >= 0', self.red.a)])
self.assertEqual(
colors._expression(band='r'), 'where(n >= 255, {black}, '
'where(n >= 64, -1.5039370078740157 * n + 223.251968503937, '
'where(n >= 0, -0.5 * n + {red}, {false})))'.format(
black=self.black.r,
red=float(self.red.r),
false=ColorGradient.BACKGROUND.r))
self.assertEqual(colors._expression(band='g'), None)
self.assertEqual(
colors._expression(band='a'),
'where(n >= 0, {red}, {false})'.format(
red=self.red.a, false=ColorGradient.BACKGROUND.a))
def test_gradient_2(self):
# Two colors
colors = ColorGradient({0: self.red, 255: self.green})
self.assertEqual(
colors._clauses(band='r'),
[('n >= 0', '-1.0 * n + {0}'.format(float(self.red.r))),
('n >= 255', self.green.r)])
self.assertEqual(
colors._clauses(band='g'),
[('n >= 0', '1.0 * n + {0}'.format(float(self.red.g))),
('n >= 255', self.green.g)])
self.assertEqual(colors._clauses(band='a'), [('n >= 0', self.red.a)])
self.assertEqual(
colors._expression(band='r'), 'where(n >= 255, {green}, '
'where(n >= 0, -1.0 * n + {red}, {false}))'.format(
red=float(self.red.r),
green=self.green.r,
false=ColorGradient.BACKGROUND.r))
self.assertEqual(
colors._expression(band='g'), 'where(n >= 255, {green}, '
'where(n >= 0, 1.0 * n + {red}, {false}))'.format(
red=float(self.red.g),
green=self.green.g,
false=ColorGradient.BACKGROUND.g))
self.assertEqual(
colors._expression(band='a'),
'where(n >= 0, {red}, {false})'.format(
red=self.red.a, false=ColorGradient.BACKGROUND.a))
# Two colors, with a nodata value in between them
colors = ColorGradient({0: self.red, 255: self.green})
self.assertEqual(
colors._clauses(band='r', nodata=1),
[('n >= 0', '-1.0 * n + {0}'.format(float(self.red.r))),
('n >= 255', self.green.r)])
self.assertEqual(
colors._clauses(band='g', nodata=1),
[('n >= 0', '1.0 * n + {0}'.format(float(self.red.g))),
('n >= 255', self.green.g)])
self.assertEqual(colors._clauses(band='a', nodata=1),
[('n >= 0', self.red.a),
('n == 1', ColorGradient.BACKGROUND.a)])
self.assertEqual(
colors._expression(band='r', nodata=1), 'where(n >= 255, {green}, '
'where(n >= 0, -1.0 * n + {red}, {false}))'.format(
red=float(self.red.r),
green=self.green.r,
false=ColorGradient.BACKGROUND.r))
self.assertEqual(
colors._expression(band='g', nodata=1), 'where(n >= 255, {green}, '
'where(n >= 0, 1.0 * n + {red}, {false}))'.format(
red=float(self.red.g),
green=self.green.g,
false=ColorGradient.BACKGROUND.g))
self.assertEqual(
colors._expression(band='a', nodata=1),
'where(n == 1, {false}, where(n >= 0, {red}, {false}))'.format(
red=self.red.a, false=ColorGradient.BACKGROUND.a))
# Two colors, with nodata value replacing one of them
colors = ColorGradient({0: self.red, 255: self.green})
self.assertEqual(
colors._clauses(band='r', nodata=0),
[('n >= 0', '-1.0 * n + {0}'.format(float(self.red.r))),
('n >= 255', self.green.r)])
self.assertEqual(
colors._clauses(band='g', nodata=0),
[('n >= 0', '1.0 * n + {0}'.format(float(self.red.g))),
('n >= 255', self.green.g)])
self.assertEqual(colors._clauses(band='a', nodata=0),
[('n >= 0', self.red.a),
('n == 0', ColorGradient.BACKGROUND.a)])
self.assertEqual(
colors._expression(band='r', nodata=0), 'where(n >= 255, {green}, '
'where(n >= 0, -1.0 * n + {red}, {false}))'.format(
red=float(self.red.r),
green=self.green.r,
false=ColorGradient.BACKGROUND.r))
self.assertEqual(
colors._expression(band='g', nodata=0), 'where(n >= 255, {green}, '
'where(n >= 0, 1.0 * n + {red}, {false}))'.format(
red=float(self.red.g),
green=self.green.g,
false=ColorGradient.BACKGROUND.g))
self.assertEqual(
colors._expression(band='a', nodata=0),
'where(n == 0, {false}, where(n >= 0, {red}, {false}))'.format(
red=self.red.a, false=ColorGradient.BACKGROUND.a))
def test_gradient_1(self):
# One color
colors = ColorGradient({0: self.red})
self.assertEqual(colors._clauses(band='r'), [('n >= 0', self.red.r)])
self.assertEqual(colors._clauses(band='a'), [('n >= 0', self.red.a)])
self.assertEqual(
colors._expression(band='r'),
'where(n >= 0, {true}, {false})'.format(
true=self.red.r, false=ColorGradient.BACKGROUND.r))
self.assertEqual(
colors._expression(band='a'),
'where(n >= 0, {true}, {false})'.format(
true=self.red.a, false=ColorGradient.BACKGROUND.a))
# One color, with nodata value before it
colors = ColorGradient({0: self.red})
self.assertEqual(colors._clauses(band='r', nodata=float('-inf')),
[('n >= 0', self.red.r)])
self.assertEqual(colors._clauses(band='a', nodata=float('-inf')),
[('n >= 0', self.red.a)])
self.assertEqual(
colors._expression(band='r', nodata=float('-inf')),
'where(n >= 0, {true}, {false})'.format(
true=self.red.r, false=ColorGradient.BACKGROUND.r))
self.assertEqual(
colors._expression(band='a', nodata=float('-inf')),
'where(n >= 0, {true}, {false})'.format(
true=self.red.a, false=ColorGradient.BACKGROUND.a))
# One color, with nodata value after it
colors = ColorGradient({0: self.red})
self.assertEqual(colors._clauses(band='r', nodata=float('inf')),
[('n >= 0', self.red.r)])
self.assertEqual(colors._clauses(band='a', nodata=float('inf')),
[('n >= 0', self.red.a),
('n == inf', ColorGradient.BACKGROUND.a)])
self.assertEqual(
colors._expression(band='r', nodata=float('inf')),
'where(n >= 0, {true}, {false})'.format(
true=self.red.r, false=ColorGradient.BACKGROUND.r))
self.assertEqual(
colors._expression(band='a', nodata=float('inf')),
'where(n == inf, {false}, where(n >= 0, {true}, {false}))'.format(
true=self.red.a, false=ColorGradient.BACKGROUND.a))
def test_gradient_3(self):
# Three colors - one gradient split in half
dark_red = rgba(127, 0, 0, 255)
colors = ColorGradient({0: self.red,
128: dark_red,
255: self.black})
self.assertEqual(
colors._clauses(band='r'),
[('n >= 0', '-1.0 * n + {0}'.format(float(self.red.r))),
('n >= 255', self.black.r)]
)
self.assertEqual(colors._clauses(band='g'),
[])
self.assertEqual(colors._clauses(band='a'),
[('n >= 0', self.red.a)])
self.assertEqual(colors._expression(band='r'),
'where(n >= 255, {black}, '
'where(n >= 0, -1.0 * n + {red}, {false}))'.format(
black=self.black.r,
red=float(self.red.r),
false=ColorGradient.BACKGROUND.r
))
self.assertEqual(colors._expression(band='g'),
None)
self.assertEqual(colors._expression(band='a'),
'where(n >= 0, {red}, {false})'.format(
red=self.red.a,
false=ColorGradient.BACKGROUND.a
))
# Three colors - one gradient split in half
dark_red = rgba(127, 0, 0, 255)
colors = ColorGradient({0: self.red,
64: dark_red,
255: self.black})
self.assertEqual(
colors._clauses(band='r'),
[('n >= 0', '-0.5 * n + {0}'.format(float(self.red.r))),
('n >= 64', '-1.5039370078740157 * n + 223.251968503937'),
('n >= 255', self.black.r)]
)
self.assertEqual(colors._clauses(band='g'),
[])
self.assertEqual(colors._clauses(band='a'),
[('n >= 0', self.red.a)])
self.assertEqual(
colors._expression(band='r'),
'where(n >= 255, {black}, '
'where(n >= 64, -1.5039370078740157 * n + 223.251968503937, '
'where(n >= 0, -0.5 * n + {red}, {false})))'.format(
black=self.black.r,
red=float(self.red.r),
false=ColorGradient.BACKGROUND.r
))
self.assertEqual(colors._expression(band='g'),
None)
self.assertEqual(colors._expression(band='a'),
'where(n >= 0, {red}, {false})'.format(
red=self.red.a,
false=ColorGradient.BACKGROUND.a
))
def test_gradient_2(self):
# Two colors
colors = ColorGradient({0: self.red,
255: self.green})
self.assertEqual(
colors._clauses(band='r'),
[('n >= 0', '-1.0 * n + {0}'.format(float(self.red.r))),
('n >= 255', self.green.r)]
)
self.assertEqual(
colors._clauses(band='g'),
[('n >= 0', '1.0 * n + {0}'.format(float(self.red.g))),
('n >= 255', self.green.g)]
)
self.assertEqual(colors._clauses(band='a'),
[('n >= 0', self.red.a)])
self.assertEqual(
colors._expression(band='r'),
'where(n >= 255, {green}, '
'where(n >= 0, -1.0 * n + {red}, {false}))'.format(
red=float(self.red.r),
green=self.green.r,
false=ColorGradient.BACKGROUND.r
)
)
self.assertEqual(
colors._expression(band='g'),
'where(n >= 255, {green}, '
'where(n >= 0, 1.0 * n + {red}, {false}))'.format(
red=float(self.red.g),
green=self.green.g,
false=ColorGradient.BACKGROUND.g
)
)
self.assertEqual(
colors._expression(band='a'),
'where(n >= 0, {red}, {false})'.format(
red=self.red.a,
false=ColorGradient.BACKGROUND.a
)
)
# Two colors, with a nodata value in between them
colors = ColorGradient({0: self.red,
255: self.green})
self.assertEqual(
colors._clauses(band='r', nodata=1),
[('n >= 0', '-1.0 * n + {0}'.format(float(self.red.r))),
('n >= 255', self.green.r)]
)
self.assertEqual(
colors._clauses(band='g', nodata=1),
[('n >= 0', '1.0 * n + {0}'.format(float(self.red.g))),
('n >= 255', self.green.g)]
)
self.assertEqual(colors._clauses(band='a', nodata=1),
[('n >= 0', self.red.a),
('n == 1', ColorGradient.BACKGROUND.a)])
self.assertEqual(
colors._expression(band='r', nodata=1),
'where(n >= 255, {green}, '
'where(n >= 0, -1.0 * n + {red}, {false}))'.format(
red=float(self.red.r),
green=self.green.r,
false=ColorGradient.BACKGROUND.r
)
)
self.assertEqual(
colors._expression(band='g', nodata=1),
'where(n >= 255, {green}, '
'where(n >= 0, 1.0 * n + {red}, {false}))'.format(
red=float(self.red.g),
green=self.green.g,
false=ColorGradient.BACKGROUND.g
)
)
self.assertEqual(
colors._expression(band='a', nodata=1),
'where(n == 1, {false}, where(n >= 0, {red}, {false}))'.format(
red=self.red.a,
false=ColorGradient.BACKGROUND.a
)
)
# Two colors, with nodata value replacing one of them
colors = ColorGradient({0: self.red,
255: self.green})
self.assertEqual(
colors._clauses(band='r', nodata=0),
[('n >= 0', '-1.0 * n + {0}'.format(float(self.red.r))),
('n >= 255', self.green.r)]
)
self.assertEqual(
colors._clauses(band='g', nodata=0),
[('n >= 0', '1.0 * n + {0}'.format(float(self.red.g))),
('n >= 255', self.green.g)]
)
self.assertEqual(colors._clauses(band='a', nodata=0),
[('n >= 0', self.red.a),
('n == 0', ColorGradient.BACKGROUND.a)])
self.assertEqual(
colors._expression(band='r', nodata=0),
'where(n >= 255, {green}, '
'where(n >= 0, -1.0 * n + {red}, {false}))'.format(
red=float(self.red.r),
green=self.green.r,
false=ColorGradient.BACKGROUND.r
)
)
self.assertEqual(
colors._expression(band='g', nodata=0),
'where(n >= 255, {green}, '
'where(n >= 0, 1.0 * n + {red}, {false}))'.format(
red=float(self.red.g),
green=self.green.g,
false=ColorGradient.BACKGROUND.g
)
)
self.assertEqual(
colors._expression(band='a', nodata=0),
'where(n == 0, {false}, where(n >= 0, {red}, {false}))'.format(
red=self.red.a,
false=ColorGradient.BACKGROUND.a
)
)
def test_gradient_1(self):
# One color
colors = ColorGradient({0: self.red})
self.assertEqual(colors._clauses(band='r'),
[('n >= 0', self.red.r)])
self.assertEqual(colors._clauses(band='a'),
[('n >= 0', self.red.a)])
self.assertEqual(colors._expression(band='r'),
'where(n >= 0, {true}, {false})'.format(
true=self.red.r,
false=ColorGradient.BACKGROUND.r
))
self.assertEqual(colors._expression(band='a'),
'where(n >= 0, {true}, {false})'.format(
true=self.red.a,
false=ColorGradient.BACKGROUND.a
))
# One color, with nodata value before it
colors = ColorGradient({0: self.red})
self.assertEqual(colors._clauses(band='r',
nodata=float('-inf')),
[('n >= 0', self.red.r)])
self.assertEqual(colors._clauses(band='a',
nodata=float('-inf')),
[('n >= 0', self.red.a)])
self.assertEqual(colors._expression(band='r', nodata=float('-inf')),
'where(n >= 0, {true}, {false})'.format(
true=self.red.r,
false=ColorGradient.BACKGROUND.r
))
self.assertEqual(colors._expression(band='a', nodata=float('-inf')),
'where(n >= 0, {true}, {false})'.format(
true=self.red.a,
false=ColorGradient.BACKGROUND.a
))
# One color, with nodata value after it
colors = ColorGradient({0: self.red})
self.assertEqual(colors._clauses(band='r',
nodata=float('inf')),
[('n >= 0', self.red.r)])
self.assertEqual(colors._clauses(band='a',
nodata=float('inf')),
[('n >= 0', self.red.a),
('n == inf', ColorGradient.BACKGROUND.a)])
self.assertEqual(colors._expression(band='r', nodata=float('inf')),
'where(n >= 0, {true}, {false})'.format(
true=self.red.r,
false=ColorGradient.BACKGROUND.r
))
self.assertEqual(
colors._expression(band='a', nodata=float('inf')),
'where(n == inf, {false}, where(n >= 0, {true}, {false}))'.format(
true=self.red.a,
false=ColorGradient.BACKGROUND.a
))