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+#
+# 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.
+#
+from __future__ import annotations
+
+import re
+from functools import lru_cache
+
+from . import Image
+
+
+@lru_cache
+def getrgb(color: str) -> tuple[int, int, int] | tuple[int, int, int, int]:
+ """
+ Convert a color string to an RGB or RGBA tuple. If the string cannot be
+ parsed, this function raises a :py:exc:`ValueError` exception.
+
+ .. versionadded:: 1.1.4
+
+ :param color: A color string
+ :return: ``(red, green, blue[, alpha])``
+ """
+ if len(color) > 100:
+ msg = "color specifier is too long"
+ raise ValueError(msg)
+ color = color.lower()
+
+ rgb = colormap.get(color, None)
+ if rgb:
+ if isinstance(rgb, tuple):
+ return rgb
+ rgb_tuple = getrgb(rgb)
+ assert len(rgb_tuple) == 3
+ colormap[color] = rgb_tuple
+ return rgb_tuple
+
+ # check for known string formats
+ if re.match("#[a-f0-9]{3}$", color):
+ return int(color[1] * 2, 16), int(color[2] * 2, 16), int(color[3] * 2, 16)
+
+ if re.match("#[a-f0-9]{4}$", color):
+ return (
+ int(color[1] * 2, 16),
+ int(color[2] * 2, 16),
+ int(color[3] * 2, 16),
+ int(color[4] * 2, 16),
+ )
+
+ if re.match("#[a-f0-9]{6}$", color):
+ return int(color[1:3], 16), int(color[3:5], 16), int(color[5:7], 16)
+
+ if re.match("#[a-f0-9]{8}$", color):
+ return (
+ int(color[1:3], 16),
+ int(color[3:5], 16),
+ int(color[5:7], 16),
+ int(color[7:9], 16),
+ )
+
+ m = re.match(r"rgb\(\s*(\d+)\s*,\s*(\d+)\s*,\s*(\d+)\s*\)$", color)
+ if m:
+ return int(m.group(1)), int(m.group(2)), int(m.group(3))
+
+ m = re.match(r"rgb\(\s*(\d+)%\s*,\s*(\d+)%\s*,\s*(\d+)%\s*\)$", color)
+ if m:
+ return (
+ 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),
+ )
+
+ m = re.match(
+ r"hsl\(\s*(\d+\.?\d*)\s*,\s*(\d+\.?\d*)%\s*,\s*(\d+\.?\d*)%\s*\)$", color
+ )
+ if m:
+ from colorsys import hls_to_rgb
+
+ rgb_floats = hls_to_rgb(
+ float(m.group(1)) / 360.0,
+ float(m.group(3)) / 100.0,
+ float(m.group(2)) / 100.0,
+ )
+ return (
+ int(rgb_floats[0] * 255 + 0.5),
+ int(rgb_floats[1] * 255 + 0.5),
+ int(rgb_floats[2] * 255 + 0.5),
+ )
+
+ m = re.match(
+ r"hs[bv]\(\s*(\d+\.?\d*)\s*,\s*(\d+\.?\d*)%\s*,\s*(\d+\.?\d*)%\s*\)$", color
+ )
+ if m:
+ from colorsys import hsv_to_rgb
+
+ rgb_floats = hsv_to_rgb(
+ float(m.group(1)) / 360.0,
+ float(m.group(2)) / 100.0,
+ float(m.group(3)) / 100.0,
+ )
+ return (
+ int(rgb_floats[0] * 255 + 0.5),
+ int(rgb_floats[1] * 255 + 0.5),
+ int(rgb_floats[2] * 255 + 0.5),
+ )
+
+ m = re.match(r"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))
+ msg = f"unknown color specifier: {repr(color)}"
+ raise ValueError(msg)
+
+
+@lru_cache
+def getcolor(color: str, mode: str) -> int | tuple[int, ...]:
+ """
+ Same as :py:func:`~PIL.ImageColor.getrgb` for most modes. However, if
+ ``mode`` is HSV, converts the RGB value to a HSV value, or if ``mode`` is
+ not color or a palette image, converts the RGB value to a grayscale value.
+ If the string cannot be parsed, this function raises a :py:exc:`ValueError`
+ exception.
+
+ .. versionadded:: 1.1.4
+
+ :param color: A color string
+ :param mode: Convert result to this mode
+ :return: ``graylevel, (graylevel, alpha) or (red, green, blue[, alpha])``
+ """
+ # same as getrgb, but converts the result to the given mode
+ rgb, alpha = getrgb(color), 255
+ if len(rgb) == 4:
+ alpha = rgb[3]
+ rgb = rgb[:3]
+
+ if mode == "HSV":
+ from colorsys import rgb_to_hsv
+
+ r, g, b = rgb
+ h, s, v = rgb_to_hsv(r / 255, g / 255, b / 255)
+ return int(h * 255), int(s * 255), int(v * 255)
+ elif Image.getmodebase(mode) == "L":
+ r, g, b = rgb
+ # ITU-R Recommendation 601-2 for nonlinear RGB
+ # scaled to 24 bits to match the convert's implementation.
+ graylevel = (r * 19595 + g * 38470 + b * 7471 + 0x8000) >> 16
+ if mode[-1] == "A":
+ return graylevel, alpha
+ return graylevel
+ elif mode[-1] == "A":
+ return rgb + (alpha,)
+ return rgb
+
+
+colormap: dict[str, str | tuple[int, int, int]] = {
+ # X11 colour table from https://drafts.csswg.org/css-color-4/, 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",
+ "rebeccapurple": "#663399",
+ "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",
+}
generated by cgit v1.2.3 (git 2.47.1) at 2025-07-27 03:42:17 +0000