def color_from_hsl(hue, sat, lig, alpha):
chroma = (1 - abs(2 * lig - 1)) * sat
h1 = hue * 6
x = chroma * (1 - abs(math.fmod(h1, 2) - 1))
col = QColor()
if 0 <= h1 < 1:
col = QColor.fromRgbF(chroma, x, 0)
elif h1 < 2:
col = QColor.fromRgbF(x, chroma, 0)
elif h1 < 3:
col = QColor.fromRgbF(0, chroma, x)
elif h1 < 4:
col = QColor.fromRgbF(0, x, chroma)
elif h1 < 5:
col = QColor.fromRgbF(x, 0, chroma)
elif h1 < 6:
col = QColor.fromRgbF(chroma, 0, x)
m = lig - chroma / 2
return QColor.fromRgbF(
clamp(col.redF() + m, 0.0, 1.0),
clamp(col.greenF() + m, 0.0, 1.0),
clamp(col.blueF() + m, 0.0, 1.0),
alpha
)
def color_from_lch(hue, chroma, luma, alpha=1):
h1 = hue * 6
x = chroma * (1 - abs(math.fmod(h1, 2) - 1))
col = QColor()
if 0 <= h1 < 1:
col = QColor.fromRgbF(chroma, x, 0)
elif h1 < 2:
col = QColor.fromRgbF(x, chroma, 0)
elif h1 < 3:
col = QColor.fromRgbF(0, chroma, x)
elif h1 < 4:
col = QColor.fromRgbF(0, x, chroma)
elif h1 < 5:
col = QColor.fromRgbF(x, 0, chroma)
elif h1 < 6:
col = QColor.fromRgbF(chroma, 0, x)
m = luma - color_luma_float(col)
return QColor.fromRgbF(
clamp(col.redF() + m, 0.0, 1.0),
clamp(col.greenF() + m, 0.0, 1.0),
clamp(col.blueF() + m, 0.0, 1.0),
alpha
)
