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Pillow/PIL/ImageColor.py

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Forking PIL
2010-07-31 06:52:47 +04:00
#
# The Python Imaging Library
# $Id$
#
# map CSS3-style colour description strings to RGB
#
# History:
# 2002-10-24 fl Added support for CSS-style color strings
# 2002-12-15 fl Added RGBA support
# 2004-03-27 fl Fixed remaining int() problems for Python 1.5.2
# 2004-07-19 fl Fixed gray/grey spelling issues
# 2009-03-05 fl Fixed rounding error in grayscale calculation
#
# Copyright (c) 2002-2004 by Secret Labs AB
# Copyright (c) 2002-2004 by Fredrik Lundh
#
# See the README file for information on usage and redistribution.
#
Fix imports
2013-03-07 20:20:28 +04:00
from PIL import Image
py3k: Use string methods instead of string module First, we go for the obvious stuff. The string module methods are gone in 3.0, so we translate them to the appropriate methods on the string class.
2012-10-11 02:11:13 +04:00
import re
Forking PIL
2010-07-31 06:52:47 +04:00
##
# Convert color string to RGB tuple.
#
# @param color A CSS3-style colour string.
# @return An RGB-tuple.
# @exception ValueError If the color string could not be interpreted
# as an RGB value.
def getrgb(color):
try:
rgb = colormap[color]
except KeyError:
try:
# fall back on case-insensitive lookup
py3k: Use string methods instead of string module First, we go for the obvious stuff. The string module methods are gone in 3.0, so we translate them to the appropriate methods on the string class.
2012-10-11 02:11:13 +04:00
rgb = colormap[color.lower()]
Forking PIL
2010-07-31 06:52:47 +04:00
except KeyError:
rgb = None
# found color in cache
if rgb:
py3k: 2to3's "idiom" filter This is, I guess, a few things the Python devs were just fed up with. * "while 1" is now "while True" * Types are compared with isinstance instead of == * Sort a list in one go with sorted() My own twist is to also replace type('') with str, type(()) with tuple, type([]) with list, type(1) with int, and type(5000.0) with float.
2012-10-17 07:39:56 +04:00
if isinstance(rgb, tuple):
Forking PIL
2010-07-31 06:52:47 +04:00
return rgb
colormap[color] = rgb = getrgb(rgb)
return rgb
# check for known string formats
m = re.match("#\w\w\w$", color)
if m:
return (
py3k: Use string methods instead of string module First, we go for the obvious stuff. The string module methods are gone in 3.0, so we translate them to the appropriate methods on the string class.
2012-10-11 02:11:13 +04:00
int(color[1]*2, 16),
int(color[2]*2, 16),
int(color[3]*2, 16)
Forking PIL
2010-07-31 06:52:47 +04:00
)
m = re.match("#\w\w\w\w\w\w$", color)
if m:
return (
py3k: Use string methods instead of string module First, we go for the obvious stuff. The string module methods are gone in 3.0, so we translate them to the appropriate methods on the string class.
2012-10-11 02:11:13 +04:00
int(color[1:3], 16),
int(color[3:5], 16),
int(color[5:7], 16)
Forking PIL
2010-07-31 06:52:47 +04:00
)
m = re.match("rgb\(\s*(\d+)\s*,\s*(\d+)\s*,\s*(\d+)\s*\)$", color)
if m:
return (
py3k: Use string methods instead of string module First, we go for the obvious stuff. The string module methods are gone in 3.0, so we translate them to the appropriate methods on the string class.
2012-10-11 02:11:13 +04:00
int(m.group(1)),
int(m.group(2)),
int(m.group(3))
Forking PIL
2010-07-31 06:52:47 +04:00
)
m = re.match("rgb\(\s*(\d+)%\s*,\s*(\d+)%\s*,\s*(\d+)%\s*\)$", color)
if m:
return (
py3k: Use string methods instead of string module First, we go for the obvious stuff. The string module methods are gone in 3.0, so we translate them to the appropriate methods on the string class.
2012-10-11 02:11:13 +04:00
int((int(m.group(1)) * 255) / 100.0 + 0.5),
int((int(m.group(2)) * 255) / 100.0 + 0.5),
int((int(m.group(3)) * 255) / 100.0 + 0.5)
Forking PIL
2010-07-31 06:52:47 +04:00
)
m = re.match("hsl\(\s*(\d+)\s*,\s*(\d+)%\s*,\s*(\d+)%\s*\)$", color)
if m:
from colorsys import hls_to_rgb
rgb = hls_to_rgb(
float(m.group(1)) / 360.0,
float(m.group(3)) / 100.0,
float(m.group(2)) / 100.0,
)
return (
int(rgb[0] * 255 + 0.5),
int(rgb[1] * 255 + 0.5),
int(rgb[2] * 255 + 0.5)
)
Add RGBA support to ImageColor
2013-07-30 18:43:40 +04:00
m = re.match("rgba\(\s*(\d+)\s*,\s*(\d+)\s*,\s*(\d+)\s*,\s*(\d+)\s*\)$", color)
if m:
return (
int(m.group(1)),
int(m.group(2)),
int(m.group(3)),
int(m.group(4))
)
Forking PIL
2010-07-31 06:52:47 +04:00
raise ValueError("unknown color specifier: %r" % color)
def getcolor(color, mode):
# same as getrgb, but converts the result to the given mode
color = getrgb(color)
if mode == "RGB":
return color
if mode == "RGBA":
ImageColor defaults to alpha = 255 in only rgb specified for RGBA mode
2013-09-19 18:30:08 +04:00
if len(color) == 3:
color = (color + (255,))
Add RGBA support to ImageColor
2013-07-30 18:43:40 +04:00
r, g, b, a = color
return r, g, b, a
Forking PIL
2010-07-31 06:52:47 +04:00
if Image.getmodebase(mode) == "L":
r, g, b = color
py3k: The big push There are two main issues fixed with this commit: * bytes vs. str: All file, image, and palette data are now handled as bytes. A new _binary module consolidates the hacks needed to do this across Python versions. tostring/fromstring methods have been renamed to tobytes/frombytes, but the Python 2.6/2.7 versions alias them to the old names for compatibility. Users should move to tobytes/frombytes. One other potentially-breaking change is that text data in image files (such as tags, comments) are now explicitly handled with a specific character encoding in mind. This works well with the Unicode str in Python 3, but may trip up old code expecting a straight byte-for-byte translation to a Python string. This also required a change to Gohlke's tags tests (in Tests/test_file_png.py) to expect Unicode strings from the code. * True div vs. floor div: Many division operations used the "/" operator to do floor division, which is now the "//" operator in Python 3. These were fixed. As of this commit, on the first pass, I have one failing test (improper handling of a slice object in a C module, test_imagepath.py) in Python 3, and three that that I haven't tried running yet (test_imagegl, test_imagegrab, and test_imageqt). I also haven't tested anything on Windows. All but the three skipped tests run flawlessly against Pythons 2.6 and 2.7.
2012-10-21 01:01:53 +04:00
return (r*299 + g*587 + b*114)//1000
Forking PIL
2010-07-31 06:52:47 +04:00
return color
colormap = {
# X11 colour table (from "CSS3 module: Color working draft"), with
# gray/grey spelling issues fixed. This is a superset of HTML 4.0
# colour names used in CSS 1.
"aliceblue": "#f0f8ff",
"antiquewhite": "#faebd7",
"aqua": "#00ffff",
"aquamarine": "#7fffd4",
"azure": "#f0ffff",
"beige": "#f5f5dc",
"bisque": "#ffe4c4",
"black": "#000000",
"blanchedalmond": "#ffebcd",
"blue": "#0000ff",
"blueviolet": "#8a2be2",
"brown": "#a52a2a",
"burlywood": "#deb887",
"cadetblue": "#5f9ea0",
"chartreuse": "#7fff00",
"chocolate": "#d2691e",
"coral": "#ff7f50",
"cornflowerblue": "#6495ed",
"cornsilk": "#fff8dc",
"crimson": "#dc143c",
"cyan": "#00ffff",
"darkblue": "#00008b",
"darkcyan": "#008b8b",
"darkgoldenrod": "#b8860b",
"darkgray": "#a9a9a9",
"darkgrey": "#a9a9a9",
"darkgreen": "#006400",
"darkkhaki": "#bdb76b",
"darkmagenta": "#8b008b",
"darkolivegreen": "#556b2f",
"darkorange": "#ff8c00",
"darkorchid": "#9932cc",
"darkred": "#8b0000",
"darksalmon": "#e9967a",
"darkseagreen": "#8fbc8f",
"darkslateblue": "#483d8b",
"darkslategray": "#2f4f4f",
"darkslategrey": "#2f4f4f",
"darkturquoise": "#00ced1",
"darkviolet": "#9400d3",
"deeppink": "#ff1493",
"deepskyblue": "#00bfff",
"dimgray": "#696969",
"dimgrey": "#696969",
"dodgerblue": "#1e90ff",
"firebrick": "#b22222",
"floralwhite": "#fffaf0",
"forestgreen": "#228b22",
"fuchsia": "#ff00ff",
"gainsboro": "#dcdcdc",
"ghostwhite": "#f8f8ff",
"gold": "#ffd700",
"goldenrod": "#daa520",
"gray": "#808080",
"grey": "#808080",
"green": "#008000",
"greenyellow": "#adff2f",
"honeydew": "#f0fff0",
"hotpink": "#ff69b4",
"indianred": "#cd5c5c",
"indigo": "#4b0082",
"ivory": "#fffff0",
"khaki": "#f0e68c",
"lavender": "#e6e6fa",
"lavenderblush": "#fff0f5",
"lawngreen": "#7cfc00",
"lemonchiffon": "#fffacd",
"lightblue": "#add8e6",
"lightcoral": "#f08080",
"lightcyan": "#e0ffff",
"lightgoldenrodyellow": "#fafad2",
"lightgreen": "#90ee90",
"lightgray": "#d3d3d3",
"lightgrey": "#d3d3d3",
"lightpink": "#ffb6c1",
"lightsalmon": "#ffa07a",
"lightseagreen": "#20b2aa",
"lightskyblue": "#87cefa",
"lightslategray": "#778899",
"lightslategrey": "#778899",
"lightsteelblue": "#b0c4de",
"lightyellow": "#ffffe0",
"lime": "#00ff00",
"limegreen": "#32cd32",
"linen": "#faf0e6",
"magenta": "#ff00ff",
"maroon": "#800000",
"mediumaquamarine": "#66cdaa",
"mediumblue": "#0000cd",
"mediumorchid": "#ba55d3",
"mediumpurple": "#9370db",
"mediumseagreen": "#3cb371",
"mediumslateblue": "#7b68ee",
"mediumspringgreen": "#00fa9a",
"mediumturquoise": "#48d1cc",
"mediumvioletred": "#c71585",
"midnightblue": "#191970",
"mintcream": "#f5fffa",
"mistyrose": "#ffe4e1",
"moccasin": "#ffe4b5",
"navajowhite": "#ffdead",
"navy": "#000080",
"oldlace": "#fdf5e6",
"olive": "#808000",
"olivedrab": "#6b8e23",
"orange": "#ffa500",
"orangered": "#ff4500",
"orchid": "#da70d6",
"palegoldenrod": "#eee8aa",
"palegreen": "#98fb98",
"paleturquoise": "#afeeee",
"palevioletred": "#db7093",
"papayawhip": "#ffefd5",
"peachpuff": "#ffdab9",
"peru": "#cd853f",
"pink": "#ffc0cb",
"plum": "#dda0dd",
"powderblue": "#b0e0e6",
"purple": "#800080",
"red": "#ff0000",
"rosybrown": "#bc8f8f",
"royalblue": "#4169e1",
"saddlebrown": "#8b4513",
"salmon": "#fa8072",
"sandybrown": "#f4a460",
"seagreen": "#2e8b57",
"seashell": "#fff5ee",
"sienna": "#a0522d",
"silver": "#c0c0c0",
"skyblue": "#87ceeb",
"slateblue": "#6a5acd",
"slategray": "#708090",
"slategrey": "#708090",
"snow": "#fffafa",
"springgreen": "#00ff7f",
"steelblue": "#4682b4",
"tan": "#d2b48c",
"teal": "#008080",
"thistle": "#d8bfd8",
"tomato": "#ff6347",
"turquoise": "#40e0d0",
"violet": "#ee82ee",
"wheat": "#f5deb3",
"white": "#ffffff",
"whitesmoke": "#f5f5f5",
"yellow": "#ffff00",
"yellowgreen": "#9acd32",
}
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