def test_from_colormap(self):
from chaco.color_mapper import ColorMapper
def colormap_function(range, **traits):
""" Typical colormap generator """
_gray_data = {
'red': [(0., 0, 0), (1., 1.0, 1.0)],
'green': [(0., 0, 0), (1., 1.0, 1.0)],
'blue': [(0., 0, 0), (1., 1.0, 1.0)]
}
return ColorMapper.from_segment_map(_gray_data,
range=range,
**traits)
self.colormap = DiscreteColorMapper.from_colormap(colormap_function,
steps=5)
gray_data = empty(shape=(5, 4))
gray_data[:] = array([0.0, 0.25, 0.5, 0.75, 1.0]).reshape(5, 1)
self.colormap = DiscreteColorMapper.from_palette_array(gray_data)
a = array([0, 2, 3])
b = self.colormap.map_screen(a)
self.assertEqual(b.shape, (3, 4))
for i in range(4):
assert_array_almost_equal(b[:, i], array([0.0, 0.5, 0.75]))
def test_alpha_palette_rgb(self):
gray_data = empty(shape=(5, 4))
gray_data[:] = array([0.0, 0.25, 0.5, 0.75, 1.0]).reshape(5, 1)
self.colormap = DiscreteColorMapper.from_palette_array(gray_data, color_depth="rgb")
a = array([0, 2, 3])
b = self.colormap.map_screen(a)
self.assertEqual(b.shape, (3, 3))
for i in range(3):
assert_array_almost_equal(b[:, i], array([0.0, 0.5, 0.75]))
def test_alpha_palette(self):
gray_data = empty(shape=(5, 4))
gray_data[:] = array([0.0, 0.25, 0.5, 0.75, 1.0]).reshape(5, 1)
self.colormap = DiscreteColorMapper.from_palette_array(gray_data)
a = array([0, 2, 3])
b = self.colormap.map_screen(a)
self.assertEqual(b.shape, (3, 4))
for i in range(4):
assert_array_almost_equal(b[:, i], array([0.0, 0.5, 0.75]))
def test_alpha_palette_map_uint8(self):
gray_data = empty(shape=(5, 4))
gray_data[:] = array([0.0, 0.25, 0.5, 0.75, 1.0]).reshape(5, 1)
self.colormap = DiscreteColorMapper.from_palette_array(gray_data)
a = array([0, 2, 3])
b = self.colormap.map_uint8(a)
self.assertEqual(b.shape, (3, 4))
self.assertEqual(b.dtype, uint8)
for i in range(4):
assert_array_almost_equal(b[:, i], array([0, 128, 192]))
def test_alpha_palette_map_uint8_rgb(self):
gray_data = empty(shape=(5, 4))
gray_data[:] = array([0.0, 0.25, 0.5, 0.75, 1.0]).reshape(5, 1)
self.colormap = DiscreteColorMapper.from_palette_array(
gray_data, color_depth='rgb')
a = array([0, 2, 3])
b = self.colormap.map_uint8(a)
self.assertEqual(b.shape, (3, 3))
self.assertEqual(b.dtype, uint8)
for i in range(3):
assert_array_almost_equal(b[:, i], array([0, 128, 192]))
def test_from_colormap(self):
from chaco.color_mapper import ColorMapper
def colormap_function(range, **traits):
""" Typical colormap generator """
_gray_data = {
"red": [(0.0, 0, 0), (1.0, 1.0, 1.0)],
"green": [(0.0, 0, 0), (1.0, 1.0, 1.0)],
"blue": [(0.0, 0, 0), (1.0, 1.0, 1.0)],
}
return ColorMapper.from_segment_map(_gray_data, range=range, **traits)
self.colormap = DiscreteColorMapper.from_colormap(colormap_function, steps=5)
gray_data = empty(shape=(5, 4))
gray_data[:] = array([0.0, 0.25, 0.5, 0.75, 1.0]).reshape(5, 1)
self.colormap = DiscreteColorMapper.from_palette_array(gray_data)
a = array([0, 2, 3])
b = self.colormap.map_screen(a)
self.assertEqual(b.shape, (3, 4))
for i in range(4):
assert_array_almost_equal(b[:, i], array([0.0, 0.5, 0.75]))
def setUp(self):
gray_data = empty(shape=(5, 3))
gray_data[:] = array([0.0, 0.25, 0.5, 0.75, 1.0]).reshape(5, 1)
self.colormap = DiscreteColorMapper.from_palette_array(gray_data)
def setUp(self):
gray_data = empty(shape=(5, 3))
gray_data[:] = array([0.0, 0.25, 0.5, 0.75, 1.0]).reshape(5, 1)
self.colormap = DiscreteColorMapper.from_palette_array(gray_data)