Gecko [ www.uxijen.com ]

Name	Size	Permission	Date
__pycache__	[ DIR ]	drwxr-xr-x	2026-01-11 17:24
asyncio	[ DIR ]	drwxr-xr-x	2026-01-11 17:24
collections	[ DIR ]	drwxr-xr-x	2026-01-11 17:24
concurrent	[ DIR ]	drwxr-xr-x	2026-01-11 17:24
config-3.12-x86_64-linux-gnu	[ DIR ]	drwxr-xr-x	2026-01-11 17:24
ctypes	[ DIR ]	drwxr-xr-x	2026-01-11 17:24
curses	[ DIR ]	drwxr-xr-x	2026-01-11 17:24
dbm	[ DIR ]	drwxr-xr-x	2026-01-11 17:24
email	[ DIR ]	drwxr-xr-x	2026-01-11 17:24
encodings	[ DIR ]	drwxr-xr-x	2026-01-11 17:24
ensurepip	[ DIR ]	drwxr-xr-x	2026-01-11 17:24
html	[ DIR ]	drwxr-xr-x	2026-01-11 17:24
http	[ DIR ]	drwxr-xr-x	2026-01-11 17:24
importlib	[ DIR ]	drwxr-xr-x	2026-01-11 17:24
json	[ DIR ]	drwxr-xr-x	2026-01-11 17:24
lib-dynload	[ DIR ]	drwxr-xr-x	2026-01-11 17:24
lib2to3	[ DIR ]	drwxr-xr-x	2026-01-11 17:24
logging	[ DIR ]	drwxr-xr-x	2026-01-11 17:24
multiprocessing	[ DIR ]	drwxr-xr-x	2026-01-11 17:24
pydoc_data	[ DIR ]	drwxr-xr-x	2026-01-11 17:24
re	[ DIR ]	drwxr-xr-x	2026-01-11 17:24
site-packages	[ DIR ]	drwxr-xr-x	2026-01-11 17:24
sqlite3	[ DIR ]	drwxr-xr-x	2026-01-11 17:24
tomllib	[ DIR ]	drwxr-xr-x	2026-01-11 17:24
unittest	[ DIR ]	drwxr-xr-x	2026-01-11 17:24
urllib	[ DIR ]	drwxr-xr-x	2026-01-11 17:24
venv	[ DIR ]	drwxr-xr-x	2026-01-11 17:24
wsgiref	[ DIR ]	drwxr-xr-x	2026-01-11 17:24
xml	[ DIR ]	drwxr-xr-x	2026-01-11 17:24
xmlrpc	[ DIR ]	drwxr-xr-x	2026-01-11 17:24
zipfile	[ DIR ]	drwxr-xr-x	2026-01-11 17:24
zoneinfo	[ DIR ]	drwxr-xr-x	2026-01-11 17:24
LICENSE.txt	13.61 KB	-rw-r--r--	2025-10-09 11:07
__future__.py	5.1 KB	-rw-r--r--	2025-10-09 11:07
__hello__.py	227 B	-rw-r--r--	2025-10-09 11:07
_aix_support.py	3.93 KB	-rw-r--r--	2025-10-09 11:07
_collections_abc.py	31.34 KB	-rw-r--r--	2025-10-09 11:07
_compat_pickle.py	8.56 KB	-rw-r--r--	2025-10-09 11:07
_compression.py	5.55 KB	-rw-r--r--	2025-10-09 11:07
_markupbase.py	14.31 KB	-rw-r--r--	2025-10-09 11:07
_osx_support.py	21.51 KB	-rw-r--r--	2025-10-09 11:07
_py_abc.py	6.04 KB	-rw-r--r--	2025-10-09 11:07
_pydatetime.py	89.93 KB	-rw-r--r--	2025-10-09 11:07
_pydecimal.py	221.96 KB	-rw-r--r--	2025-10-09 11:07
_pyio.py	91.4 KB	-rw-r--r--	2025-10-09 11:07
_pylong.py	10.54 KB	-rw-r--r--	2025-10-09 11:07
_sitebuiltins.py	3.05 KB	-rw-r--r--	2025-10-09 11:07
_strptime.py	27.73 KB	-rw-r--r--	2025-10-09 11:07
_sysconfigdata__linux_x86_64-linux-gnu.py	70.44 KB	-rw-r--r--	2026-01-06 20:14
_threading_local.py	7.05 KB	-rw-r--r--	2025-10-09 11:07
_weakrefset.py	5.75 KB	-rw-r--r--	2025-10-09 11:07
abc.py	6.38 KB	-rw-r--r--	2025-10-09 11:07
aifc.py	33.41 KB	-rw-r--r--	2025-10-09 11:07
antigravity.py	500 B	-rw-r--r--	2025-10-09 11:07
argparse.py	98.78 KB	-rw-r--r--	2025-10-09 11:07
ast.py	62.94 KB	-rw-r--r--	2025-10-09 11:07
base64.py	20.15 KB	-rwxr-xr-x	2025-10-09 11:07
bdb.py	32.79 KB	-rw-r--r--	2025-10-09 11:07
bisect.py	3.34 KB	-rw-r--r--	2025-10-09 11:07
bz2.py	11.57 KB	-rw-r--r--	2025-10-09 11:07
cProfile.py	6.4 KB	-rwxr-xr-x	2025-10-09 11:07
calendar.py	25.26 KB	-rw-r--r--	2025-10-09 11:07
cgi.py	33.61 KB	-rwxr-xr-x	2025-10-09 11:07
cgitb.py	12.13 KB	-rw-r--r--	2025-10-09 11:07
chunk.py	5.37 KB	-rw-r--r--	2025-10-09 11:07
cmd.py	14.52 KB	-rw-r--r--	2025-10-09 11:07
code.py	10.71 KB	-rw-r--r--	2025-10-09 11:07
codecs.py	36.01 KB	-rw-r--r--	2025-10-09 11:07
codeop.py	5.77 KB	-rw-r--r--	2025-10-09 11:07
colorsys.py	3.97 KB	-rw-r--r--	2025-10-09 11:07
compileall.py	20.03 KB	-rw-r--r--	2025-10-09 11:07
configparser.py	52.53 KB	-rw-r--r--	2025-10-09 11:07
contextlib.py	26.99 KB	-rw-r--r--	2025-10-09 11:07
contextvars.py	129 B	-rw-r--r--	2025-10-09 11:07
copy.py	8.21 KB	-rw-r--r--	2025-10-09 11:07
copyreg.py	7.44 KB	-rw-r--r--	2025-10-09 11:07
crypt.py	3.82 KB	-rw-r--r--	2025-10-09 11:07
csv.py	16 KB	-rw-r--r--	2025-10-09 11:07
dataclasses.py	60.63 KB	-rw-r--r--	2025-10-09 11:07
datetime.py	268 B	-rw-r--r--	2025-10-09 11:07
decimal.py	2.74 KB	-rw-r--r--	2025-10-09 11:07
difflib.py	81.41 KB	-rw-r--r--	2025-10-09 11:07
dis.py	29.52 KB	-rw-r--r--	2025-10-09 11:07
doctest.py	104.25 KB	-rw-r--r--	2025-10-09 11:07
enum.py	79.63 KB	-rw-r--r--	2025-10-09 11:07
filecmp.py	10.14 KB	-rw-r--r--	2025-10-09 11:07
fileinput.py	15.35 KB	-rw-r--r--	2025-10-09 11:07
fnmatch.py	5.86 KB	-rw-r--r--	2025-10-09 11:07
fractions.py	37.25 KB	-rw-r--r--	2025-10-09 11:07
ftplib.py	33.92 KB	-rw-r--r--	2025-10-09 11:07
functools.py	37.05 KB	-rw-r--r--	2025-10-09 11:07
genericpath.py	5.44 KB	-rw-r--r--	2025-10-09 11:07
getopt.py	7.31 KB	-rw-r--r--	2025-10-09 11:07
getpass.py	5.85 KB	-rw-r--r--	2025-10-09 11:07
gettext.py	20.82 KB	-rw-r--r--	2025-10-09 11:07
glob.py	8.53 KB	-rw-r--r--	2025-10-09 11:07
graphlib.py	9.42 KB	-rw-r--r--	2025-10-09 11:07
gzip.py	24.81 KB	-rw-r--r--	2025-10-09 11:07
hashlib.py	9.46 KB	-rw-r--r--	2026-01-06 19:56
heapq.py	22.48 KB	-rw-r--r--	2025-10-09 11:07
hmac.py	7.85 KB	-rw-r--r--	2026-01-06 19:56
imaplib.py	52.77 KB	-rw-r--r--	2025-10-09 11:07
imghdr.py	4.29 KB	-rw-r--r--	2025-10-09 11:07
inspect.py	124.15 KB	-rw-r--r--	2025-10-09 11:07
io.py	3.5 KB	-rw-r--r--	2025-10-09 11:07
ipaddress.py	79.51 KB	-rw-r--r--	2025-10-09 11:07
keyword.py	1.05 KB	-rw-r--r--	2025-10-09 11:07
linecache.py	5.66 KB	-rw-r--r--	2025-10-09 11:07
locale.py	76.76 KB	-rw-r--r--	2025-10-09 11:07
lzma.py	12.97 KB	-rw-r--r--	2025-10-09 11:07
mailbox.py	77.06 KB	-rw-r--r--	2025-10-09 11:07
mailcap.py	9.11 KB	-rw-r--r--	2025-10-09 11:07
mimetypes.py	22.5 KB	-rw-r--r--	2025-10-09 11:07
modulefinder.py	23.14 KB	-rw-r--r--	2025-10-09 11:07
netrc.py	6.76 KB	-rw-r--r--	2025-10-09 11:07
nntplib.py	40.12 KB	-rw-r--r--	2025-10-09 11:07
ntpath.py	31.57 KB	-rw-r--r--	2025-10-09 11:07
nturl2path.py	2.32 KB	-rw-r--r--	2025-10-09 11:07
numbers.py	11.2 KB	-rw-r--r--	2025-10-09 11:07
opcode.py	12.87 KB	-rw-r--r--	2025-10-09 11:07
operator.py	10.71 KB	-rw-r--r--	2025-10-09 11:07
optparse.py	58.95 KB	-rw-r--r--	2025-10-09 11:07
os.py	39.86 KB	-rw-r--r--	2025-10-09 11:07
pathlib.py	49.86 KB	-rw-r--r--	2025-10-09 11:07
pdb.py	68.65 KB	-rwxr-xr-x	2025-10-09 11:07
pickle.py	65.34 KB	-rw-r--r--	2025-10-09 11:07
pickletools.py	91.85 KB	-rw-r--r--	2025-10-09 11:07
pipes.py	8.77 KB	-rw-r--r--	2025-10-09 11:07
pkgutil.py	17.85 KB	-rw-r--r--	2025-10-09 11:07
platform.py	42.37 KB	-rwxr-xr-x	2025-10-09 11:07
plistlib.py	27.68 KB	-rw-r--r--	2025-10-09 11:07
poplib.py	14.28 KB	-rw-r--r--	2025-10-09 11:07
posixpath.py	17.07 KB	-rw-r--r--	2025-10-09 11:07
pprint.py	23.59 KB	-rw-r--r--	2025-10-09 11:07
profile.py	22.55 KB	-rwxr-xr-x	2025-10-09 11:07
pstats.py	28.6 KB	-rw-r--r--	2025-10-09 11:07
pty.py	5.99 KB	-rw-r--r--	2025-10-09 11:07
py_compile.py	7.65 KB	-rw-r--r--	2025-10-09 11:07
pyclbr.py	11.13 KB	-rw-r--r--	2025-10-09 11:07
pydoc.py	110.85 KB	-rwxr-xr-x	2025-10-09 11:07
queue.py	11.23 KB	-rw-r--r--	2025-10-09 11:07
quopri.py	7.01 KB	-rwxr-xr-x	2025-10-09 11:07
random.py	33.88 KB	-rw-r--r--	2025-10-09 11:07
reprlib.py	6.98 KB	-rw-r--r--	2025-10-09 11:07
rlcompleter.py	7.64 KB	-rw-r--r--	2025-10-09 11:07
runpy.py	12.58 KB	-rw-r--r--	2025-10-09 11:07
sched.py	6.2 KB	-rw-r--r--	2025-10-09 11:07
secrets.py	1.94 KB	-rw-r--r--	2025-10-09 11:07
selectors.py	19.21 KB	-rw-r--r--	2025-10-09 11:07
shelve.py	8.36 KB	-rw-r--r--	2025-10-09 11:07
shlex.py	13.04 KB	-rw-r--r--	2025-10-09 11:07
shutil.py	55.43 KB	-rw-r--r--	2025-10-09 11:07
signal.py	2.44 KB	-rw-r--r--	2025-10-09 11:07
site.py	22.89 KB	-rw-r--r--	2026-01-06 19:56
smtplib.py	42.51 KB	-rwxr-xr-x	2025-10-09 11:07
sndhdr.py	7.27 KB	-rw-r--r--	2025-10-09 11:07
socket.py	36.93 KB	-rw-r--r--	2025-10-09 11:07
socketserver.py	27.41 KB	-rw-r--r--	2025-10-09 11:07
sre_compile.py	231 B	-rw-r--r--	2025-10-09 11:07
sre_constants.py	232 B	-rw-r--r--	2025-10-09 11:07
sre_parse.py	229 B	-rw-r--r--	2025-10-09 11:07
ssl.py	49.71 KB	-rw-r--r--	2025-10-09 11:07
stat.py	5.36 KB	-rw-r--r--	2025-10-09 11:07
statistics.py	49.05 KB	-rw-r--r--	2025-10-09 11:07
string.py	11.51 KB	-rw-r--r--	2025-10-09 11:07
stringprep.py	12.61 KB	-rw-r--r--	2025-10-09 11:07
struct.py	257 B	-rw-r--r--	2025-10-09 11:07
subprocess.py	86.67 KB	-rw-r--r--	2025-10-09 11:07
sunau.py	18.04 KB	-rw-r--r--	2025-10-09 11:07
symtable.py	12.18 KB	-rw-r--r--	2025-10-09 11:07
sysconfig.py	32.98 KB	-rw-r--r--	2026-01-06 20:14
tabnanny.py	11.26 KB	-rwxr-xr-x	2025-10-09 11:07
tarfile.py	111.57 KB	-rwxr-xr-x	2026-01-06 19:56
telnetlib.py	22.79 KB	-rw-r--r--	2025-10-09 11:07
tempfile.py	31.63 KB	-rw-r--r--	2025-10-09 11:07
textwrap.py	19.26 KB	-rw-r--r--	2025-10-09 11:07
this.py	1003 B	-rw-r--r--	2025-10-09 11:07
threading.py	58.34 KB	-rw-r--r--	2026-01-06 19:56
timeit.py	13.15 KB	-rwxr-xr-x	2025-10-09 11:07
token.py	2.45 KB	-rw-r--r--	2025-10-09 11:07
tokenize.py	21.06 KB	-rw-r--r--	2025-10-09 11:07
trace.py	28.66 KB	-rwxr-xr-x	2025-10-09 11:07
traceback.py	45.31 KB	-rw-r--r--	2025-10-09 11:07
tracemalloc.py	17.62 KB	-rw-r--r--	2025-10-09 11:07
tty.py	1.99 KB	-rw-r--r--	2025-10-09 11:07
types.py	10.74 KB	-rw-r--r--	2025-10-09 11:07
typing.py	116.05 KB	-rw-r--r--	2025-10-09 11:07
uu.py	7.17 KB	-rw-r--r--	2026-01-06 20:14
uuid.py	28.96 KB	-rw-r--r--	2025-10-09 11:07
warnings.py	21.4 KB	-rw-r--r--	2025-10-09 11:07
wave.py	22.24 KB	-rw-r--r--	2025-10-09 11:07
weakref.py	21.01 KB	-rw-r--r--	2025-10-09 11:07
webbrowser.py	23.18 KB	-rwxr-xr-x	2025-10-09 11:07
xdrlib.py	5.8 KB	-rw-r--r--	2025-10-09 11:07
zipapp.py	7.37 KB	-rw-r--r--	2025-10-09 11:07
zipimport.py	27.19 KB	-rw-r--r--	2025-10-09 11:07

Rename

"""Conversion functions between RGB and other color systems.

This modules provides two functions for each color system ABC:

rgb_to_abc(r, g, b) --> a, b, c
  abc_to_rgb(a, b, c) --> r, g, b

All inputs and outputs are triples of floats in the range [0.0...1.0]
(with the exception of I and Q, which covers a slightly larger range).
Inputs outside the valid range may cause exceptions or invalid outputs.

Supported color systems:
RGB: Red, Green, Blue components
YIQ: Luminance, Chrominance (used by composite video signals)
HLS: Hue, Luminance, Saturation
HSV: Hue, Saturation, Value
"""

# References:
# http://en.wikipedia.org/wiki/YIQ
# http://en.wikipedia.org/wiki/HLS_color_space
# http://en.wikipedia.org/wiki/HSV_color_space

__all__ = ["rgb_to_yiq","yiq_to_rgb","rgb_to_hls","hls_to_rgb",
           "rgb_to_hsv","hsv_to_rgb"]

# Some floating-point constants

ONE_THIRD = 1.0/3.0
ONE_SIXTH = 1.0/6.0
TWO_THIRD = 2.0/3.0

# YIQ: used by composite video signals (linear combinations of RGB)
# Y: perceived grey level (0.0 == black, 1.0 == white)
# I, Q: color components
#
# There are a great many versions of the constants used in these formulae.
# The ones in this library uses constants from the FCC version of NTSC.

def rgb_to_yiq(r, g, b):
    y = 0.30*r + 0.59*g + 0.11*b
    i = 0.74*(r-y) - 0.27*(b-y)
    q = 0.48*(r-y) + 0.41*(b-y)
    return (y, i, q)

def yiq_to_rgb(y, i, q):
    # r = y + (0.27*q + 0.41*i) / (0.74*0.41 + 0.27*0.48)
    # b = y + (0.74*q - 0.48*i) / (0.74*0.41 + 0.27*0.48)
    # g = y - (0.30*(r-y) + 0.11*(b-y)) / 0.59

r = y + 0.9468822170900693*i + 0.6235565819861433*q
    g = y - 0.27478764629897834*i - 0.6356910791873801*q
    b = y - 1.1085450346420322*i + 1.7090069284064666*q

if r < 0.0:
        r = 0.0
    if g < 0.0:
        g = 0.0
    if b < 0.0:
        b = 0.0
    if r > 1.0:
        r = 1.0
    if g > 1.0:
        g = 1.0
    if b > 1.0:
        b = 1.0
    return (r, g, b)

# HLS: Hue, Luminance, Saturation
# H: position in the spectrum
# L: color lightness
# S: color saturation

def rgb_to_hls(r, g, b):
    maxc = max(r, g, b)
    minc = min(r, g, b)
    sumc = (maxc+minc)
    rangec = (maxc-minc)
    l = sumc/2.0
    if minc == maxc:
        return 0.0, l, 0.0
    if l <= 0.5:
        s = rangec / sumc
    else:
        s = rangec / (2.0-maxc-minc)  # Not always 2.0-sumc: gh-106498.
    rc = (maxc-r) / rangec
    gc = (maxc-g) / rangec
    bc = (maxc-b) / rangec
    if r == maxc:
        h = bc-gc
    elif g == maxc:
        h = 2.0+rc-bc
    else:
        h = 4.0+gc-rc
    h = (h/6.0) % 1.0
    return h, l, s

def hls_to_rgb(h, l, s):
    if s == 0.0:
        return l, l, l
    if l <= 0.5:
        m2 = l * (1.0+s)
    else:
        m2 = l+s-(l*s)
    m1 = 2.0*l - m2
    return (_v(m1, m2, h+ONE_THIRD), _v(m1, m2, h), _v(m1, m2, h-ONE_THIRD))

def _v(m1, m2, hue):
    hue = hue % 1.0
    if hue < ONE_SIXTH:
        return m1 + (m2-m1)*hue*6.0
    if hue < 0.5:
        return m2
    if hue < TWO_THIRD:
        return m1 + (m2-m1)*(TWO_THIRD-hue)*6.0
    return m1

# HSV: Hue, Saturation, Value
# H: position in the spectrum
# S: color saturation ("purity")
# V: color brightness

def rgb_to_hsv(r, g, b):
    maxc = max(r, g, b)
    minc = min(r, g, b)
    rangec = (maxc-minc)
    v = maxc
    if minc == maxc:
        return 0.0, 0.0, v
    s = rangec / maxc
    rc = (maxc-r) / rangec
    gc = (maxc-g) / rangec
    bc = (maxc-b) / rangec
    if r == maxc:
        h = bc-gc
    elif g == maxc:
        h = 2.0+rc-bc
    else:
        h = 4.0+gc-rc
    h = (h/6.0) % 1.0
    return h, s, v

def hsv_to_rgb(h, s, v):
    if s == 0.0:
        return v, v, v
    i = int(h*6.0) # XXX assume int() truncates!
    f = (h*6.0) - i
    p = v*(1.0 - s)
    q = v*(1.0 - s*f)
    t = v*(1.0 - s*(1.0-f))
    i = i%6
    if i == 0:
        return v, t, p
    if i == 1:
        return q, v, p
    if i == 2:
        return p, v, t
    if i == 3:
        return p, q, v
    if i == 4:
        return t, p, v
    if i == 5:
        return v, p, q
    # Cannot get here