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# coding: utf-8
# /*##########################################################################
#
# Copyright (c) 2004-2017 European Synchrotron Radiation Facility
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
#
# ###########################################################################*/
"""Color conversion function, color dictionary and colormap tools."""
from __future__ import absolute_import
__authors__ = ["V.A. Sole", "T. Vincent"]
__license__ = "MIT"
__date__ = "15/05/2017"
from silx.utils.deprecation import deprecated
import logging
import numpy
from .Colormap import Colormap
_logger = logging.getLogger(__name__)
COLORDICT = {}
"""Dictionary of common colors."""
COLORDICT['b'] = COLORDICT['blue'] = '#0000ff'
COLORDICT['r'] = COLORDICT['red'] = '#ff0000'
COLORDICT['g'] = COLORDICT['green'] = '#00ff00'
COLORDICT['k'] = COLORDICT['black'] = '#000000'
COLORDICT['w'] = COLORDICT['white'] = '#ffffff'
COLORDICT['pink'] = '#ff66ff'
COLORDICT['brown'] = '#a52a2a'
COLORDICT['orange'] = '#ff9900'
COLORDICT['violet'] = '#6600ff'
COLORDICT['gray'] = COLORDICT['grey'] = '#a0a0a4'
# COLORDICT['darkGray'] = COLORDICT['darkGrey'] = '#808080'
# COLORDICT['lightGray'] = COLORDICT['lightGrey'] = '#c0c0c0'
COLORDICT['y'] = COLORDICT['yellow'] = '#ffff00'
COLORDICT['m'] = COLORDICT['magenta'] = '#ff00ff'
COLORDICT['c'] = COLORDICT['cyan'] = '#00ffff'
COLORDICT['darkBlue'] = '#000080'
COLORDICT['darkRed'] = '#800000'
COLORDICT['darkGreen'] = '#008000'
COLORDICT['darkBrown'] = '#660000'
COLORDICT['darkCyan'] = '#008080'
COLORDICT['darkYellow'] = '#808000'
COLORDICT['darkMagenta'] = '#800080'
def rgba(color, colorDict=None):
"""Convert color code '#RRGGBB' and '#RRGGBBAA' to (R, G, B, A)
It also convert RGB(A) values from uint8 to float in [0, 1] and
accept a QColor as color argument.
:param str color: The color to convert
:param dict colorDict: A dictionary of color name conversion to color code
:returns: RGBA colors as floats in [0., 1.]
:rtype: tuple
"""
if colorDict is None:
colorDict = COLORDICT
if hasattr(color, 'getRgbF'): # QColor support
color = color.getRgbF()
values = numpy.asarray(color).ravel()
if values.dtype.kind in 'iuf': # integer or float
# Color is an array
assert len(values) in (3, 4)
# Convert from integers in [0, 255] to float in [0, 1]
if values.dtype.kind in 'iu':
values = values / 255.
# Clip to [0, 1]
values[values < 0.] = 0.
values[values > 1.] = 1.
if len(values) == 3:
return values[0], values[1], values[2], 1.
else:
return tuple(values)
# We assume color is a string
if not color.startswith('#'):
color = colorDict[color]
assert len(color) in (7, 9) and color[0] == '#'
r = int(color[1:3], 16) / 255.
g = int(color[3:5], 16) / 255.
b = int(color[5:7], 16) / 255.
a = int(color[7:9], 16) / 255. if len(color) == 9 else 1.
return r, g, b, a
_COLORMAP_CURSOR_COLORS = {
'gray': 'pink',
'reversed gray': 'pink',
'temperature': 'pink',
'red': 'green',
'green': 'pink',
'blue': 'yellow',
'jet': 'pink',
'viridis': 'pink',
'magma': 'green',
'inferno': 'green',
'plasma': 'green',
}
def cursorColorForColormap(colormapName):
"""Get a color suitable for overlay over a colormap.
:param str colormapName: The name of the colormap.
:return: Name of the color.
:rtype: str
"""
return _COLORMAP_CURSOR_COLORS.get(colormapName, 'black')
@deprecated(replacement='silx.gui.plot.Colormap.applyColormap')
def applyColormapToData(data,
name='gray',
normalization='linear',
autoscale=True,
vmin=0.,
vmax=1.,
colors=None):
"""Apply a colormap to the data and returns the RGBA image
This supports data of any dimensions (not only of dimension 2).
The returned array will have one more dimension (with 4 entries)
than the input data to store the RGBA channels
corresponding to each bin in the array.
:param numpy.ndarray data: The data to convert.
:param str name: Name of the colormap (default: 'gray').
:param str normalization: Colormap mapping: 'linear' or 'log'.
:param bool autoscale: Whether to use data min/max (True, default)
or [vmin, vmax] range (False).
:param float vmin: The minimum value of the range to use if
'autoscale' is False.
:param float vmax: The maximum value of the range to use if
'autoscale' is False.
:param numpy.ndarray colors: Only used if name is None.
Custom colormap colors as Nx3 or Nx4 RGB or RGBA arrays
:return: The computed RGBA image
:rtype: numpy.ndarray of uint8
"""
colormap = Colormap(name=name,
normalization=normalization,
vmin=vmin,
vmax=vmax,
colors=colors)
return colormap.applyToData(data)
@deprecated(replacement='silx.gui.plot.Colormap.getSupportedColormaps')
def getSupportedColormaps():
"""Get the supported colormap names as a tuple of str.
The list should at least contain and start by:
('gray', 'reversed gray', 'temperature', 'red', 'green', 'blue')
"""
return Colormap.getSupportedColormaps()
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