def check_rgb_irgb(self, irgb0, verbose):
''' Check that conversions between rgb and irgb are invertible. '''
rgb0 = colormodels.rgb_from_irgb (irgb0)
irgb1 = colormodels.irgb_from_rgb (rgb0)
rgb1 = colormodels.rgb_from_irgb (irgb1)
# Integer conversion should match exactly.
self.assertEqual(irgb0[0], irgb1[0])
self.assertEqual(irgb0[1], irgb1[1])
self.assertEqual(irgb0[2], irgb1[2])
msg = 'irgb0: %s irgb1: %s' % (str(irgb0), str(irgb1))
if verbose:
print (msg)
# Float conversion should match closely.
# (It actually seems to match exactly for me.)
tolerance = 1.0e-14
err_rgb = rgb1 - rgb0
err_r = math.fabs (err_rgb [0])
err_g = math.fabs (err_rgb [1])
err_b = math.fabs (err_rgb [2])
self.assertLessEqual(err_r, tolerance)
self.assertLessEqual(err_g, tolerance)
self.assertLessEqual(err_b, tolerance)
msg = 'rgb0: %s rgb1: %s' % (str(rgb0), str(rgb1))
if verbose:
print (msg)
def test_rgb_irgb(verbose=1):
'''Test that conversions between rgb and irgb are invertible.'''
for i in xrange(0, 100):
ir = random.randrange(0, 256)
ig = random.randrange(0, 256)
ib = random.randrange(0, 256)
irgb0 = colormodels.irgb_color(ir, ig, ib)
rgb0 = colormodels.rgb_from_irgb(irgb0)
irgb1 = colormodels.irgb_from_rgb(rgb0)
rgb1 = colormodels.rgb_from_irgb(irgb1)
if (irgb0[0] != irgb1[0]) or (irgb0[1] != irgb1[1]) or (irgb0[2] !=
irgb1[2]):
msg = 'irgb0 %s and irgb1 %s do not match' % (str(irgb0),
str(irgb1))
raise ValueError(msg)
tolerance = 1.0e-14
err_rgb = rgb1 - rgb0
err_r = math.fabs(err_rgb[0])
err_g = math.fabs(err_rgb[1])
err_b = math.fabs(err_rgb[2])
if (err_r > tolerance) or (err_g > tolerance) or (err_b > tolerance):
msg = 'rgb0 %s and rgb1 %s differ by %g' % (
str(rgb0), str(rgb1), max(err_r, err_g, err_b))
raise ValueError(msg)
if verbose >= 1:
print('Passed test_rgb_irgb()')
def check_rgb_irgb(self, irgb0, verbose):
''' Check that conversions between rgb and irgb are invertible. '''
rgb0 = colormodels.rgb_from_irgb(irgb0)
irgb1 = colormodels.irgb_from_rgb(rgb0)
rgb1 = colormodels.rgb_from_irgb(irgb1)
# Integer conversion should match exactly.
self.assertEqual(irgb0[0], irgb1[0])
self.assertEqual(irgb0[1], irgb1[1])
self.assertEqual(irgb0[2], irgb1[2])
msg = 'irgb0: %s irgb1: %s' % (str(irgb0), str(irgb1))
if verbose:
print(msg)
# Float conversion should match closely.
# (It actually seems to match exactly for me.)
tolerance = 1.0e-14
err_rgb = rgb1 - rgb0
err_r = math.fabs(err_rgb[0])
err_g = math.fabs(err_rgb[1])
err_b = math.fabs(err_rgb[2])
self.assertLessEqual(err_r, tolerance)
self.assertLessEqual(err_g, tolerance)
self.assertLessEqual(err_b, tolerance)
msg = 'rgb0: %s rgb1: %s' % (str(rgb0), str(rgb1))
if verbose:
print(msg)
def colorstring_patch_plot (colorstrings, color_names, title, filename, num_across=6):
'''Color patch plot for colors specified as hex strings.'''
rgb_colors = []
for color in colorstrings:
irgb = colormodels.irgb_from_irgb_string (color)
rgb = colormodels.rgb_from_irgb (irgb)
rgb_colors.append (rgb)
plots.rgb_patch_plot (
rgb_colors,
color_names,
title,
filename,
num_across=num_across)
def test_rgb_irgb (verbose=1):
'''Test that conversions between rgb and irgb are invertible.'''
for i in xrange (0, 100):
ir = random.randrange (0, 256)
ig = random.randrange (0, 256)
ib = random.randrange (0, 256)
irgb0 = colormodels.irgb_color (ir, ig, ib)
rgb0 = colormodels.rgb_from_irgb (irgb0)
irgb1 = colormodels.irgb_from_rgb (rgb0)
rgb1 = colormodels.rgb_from_irgb (irgb1)
if (irgb0[0] != irgb1[0]) or (irgb0[1] != irgb1[1]) or (irgb0[2] != irgb1[2]):
msg = 'irgb0 %s and irgb1 %s do not match' % (str (irgb0), str (irgb1))
raise ValueError, msg
tolerance = 1.0e-14
err_rgb = rgb1 - rgb0
err_r = math.fabs (err_rgb [0])
err_g = math.fabs (err_rgb [1])
err_b = math.fabs (err_rgb [2])
if (err_r > tolerance) or (err_g > tolerance) or (err_b > tolerance):
msg = 'rgb0 %s and rgb1 %s differ by %g' % (str (rgb0), str (rgb1), max (err_r,err_g,err_b))
raise ValueError, msg
if verbose >= 1:
print 'Passed test_rgb_irgb()'
def colorstring_patch_plot(colorstrings,
color_names,
title,
filename,
num_across=6):
'''Color patch plot for colors specified as hex strings.'''
rgb_colors = []
for color in colorstrings:
irgb = colormodels.irgb_from_irgb_string(color)
rgb = colormodels.rgb_from_irgb(irgb)
rgb_colors.append(rgb)
plots.rgb_patch_plot(rgb_colors,
color_names,
title,
filename,
num_across=num_across)
