Varia's website
https://varia.zone
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
101 lines
3.2 KiB
101 lines
3.2 KiB
1 week ago
|
from math import sqrt
|
||
|
|
from functools import lru_cache
|
||
|
|
from typing import Sequence, Tuple, TYPE_CHECKING
|
||
|
|
|
||
|
|
from .color_triplet import ColorTriplet
|
||
|
|
|
||
|
|
if TYPE_CHECKING:
|
||
|
|
from rich.table import Table
|
||
|
|
|
||
|
|
|
||
|
|
class Palette:
|
||
|
|
"""A palette of available colors."""
|
||
|
|
|
||
|
|
def __init__(self, colors: Sequence[Tuple[int, int, int]]):
|
||
|
|
self._colors = colors
|
||
|
|
|
||
|
|
def __getitem__(self, number: int) -> ColorTriplet:
|
||
|
|
return ColorTriplet(*self._colors[number])
|
||
|
|
|
||
|
|
def __rich__(self) -> "Table":
|
||
|
|
from rich.color import Color
|
||
|
|
from rich.style import Style
|
||
|
|
from rich.text import Text
|
||
|
|
from rich.table import Table
|
||
|
|
|
||
|
|
table = Table(
|
||
|
|
"index",
|
||
|
|
"RGB",
|
||
|
|
"Color",
|
||
|
|
title="Palette",
|
||
|
|
caption=f"{len(self._colors)} colors",
|
||
|
|
highlight=True,
|
||
|
|
caption_justify="right",
|
||
|
|
)
|
||
|
|
for index, color in enumerate(self._colors):
|
||
|
|
table.add_row(
|
||
|
|
str(index),
|
||
|
|
repr(color),
|
||
|
|
Text(" " * 16, style=Style(bgcolor=Color.from_rgb(*color))),
|
||
|
|
)
|
||
|
|
return table
|
||
|
|
|
||
|
|
# This is somewhat inefficient and needs caching
|
||
|
|
@lru_cache(maxsize=1024)
|
||
|
|
def match(self, color: Tuple[int, int, int]) -> int:
|
||
|
|
"""Find a color from a palette that most closely matches a given color.
|
||
|
|
|
||
|
|
Args:
|
||
|
|
color (Tuple[int, int, int]): RGB components in range 0 > 255.
|
||
|
|
|
||
|
|
Returns:
|
||
|
|
int: Index of closes matching color.
|
||
|
|
"""
|
||
|
|
red1, green1, blue1 = color
|
||
|
|
_sqrt = sqrt
|
||
|
|
get_color = self._colors.__getitem__
|
||
|
|
|
||
|
|
def get_color_distance(index: int) -> float:
|
||
|
|
"""Get the distance to a color."""
|
||
|
|
red2, green2, blue2 = get_color(index)
|
||
|
|
red_mean = (red1 + red2) // 2
|
||
|
|
red = red1 - red2
|
||
|
|
green = green1 - green2
|
||
|
|
blue = blue1 - blue2
|
||
|
|
return _sqrt(
|
||
|
|
(((512 + red_mean) * red * red) >> 8)
|
||
|
|
+ 4 * green * green
|
||
|
|
+ (((767 - red_mean) * blue * blue) >> 8)
|
||
|
|
)
|
||
|
|
|
||
|
|
min_index = min(range(len(self._colors)), key=get_color_distance)
|
||
|
|
return min_index
|
||
|
|
|
||
|
|
|
||
|
|
if __name__ == "__main__": # pragma: no cover
|
||
|
|
import colorsys
|
||
|
|
from typing import Iterable
|
||
|
|
from rich.color import Color
|
||
|
|
from rich.console import Console, ConsoleOptions
|
||
|
|
from rich.segment import Segment
|
||
|
|
from rich.style import Style
|
||
|
|
|
||
|
|
class ColorBox:
|
||
|
|
def __rich_console__(
|
||
|
|
self, console: Console, options: ConsoleOptions
|
||
|
|
) -> Iterable[Segment]:
|
||
|
|
height = console.size.height - 3
|
||
|
|
for y in range(0, height):
|
||
|
|
for x in range(options.max_width):
|
||
|
|
h = x / options.max_width
|
||
|
|
l = y / (height + 1)
|
||
|
|
r1, g1, b1 = colorsys.hls_to_rgb(h, l, 1.0)
|
||
|
|
r2, g2, b2 = colorsys.hls_to_rgb(h, l + (1 / height / 2), 1.0)
|
||
|
|
bgcolor = Color.from_rgb(r1 * 255, g1 * 255, b1 * 255)
|
||
|
|
color = Color.from_rgb(r2 * 255, g2 * 255, b2 * 255)
|
||
|
|
yield Segment("▄", Style(color=color, bgcolor=bgcolor))
|
||
|
|
yield Segment.line()
|
||
|
|
|
||
|
|
console = Console()
|
||
|
|
console.print(ColorBox())
|