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This commit is contained in:
hugovk 2014-07-15 18:38:10 +03:00
parent 4b40839970
commit 17223001df
1 changed files with 19 additions and 10 deletions
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9
PIL/ImagePalette.py
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@ -109,6 +109,7 @@ class ImagePalette:
fp.write("\n")
fp.close()
# --------------------------------------------------------------------
# Internal
@ -119,6 +120,7 @@ def raw(rawmode, data):
palette.dirty = 1
return palette
# --------------------------------------------------------------------
# Factories
@ -131,20 +133,24 @@ def _make_linear_lut(black, white):
raise NotImplementedError # FIXME
return lut
def _make_gamma_lut(exp, mode="RGB"):
lut = []
for i in range(256):
lut.append(int(((i / 255.0) ** exp) * 255.0 + 0.5))
return lut
def new(mode, data):
return Image.core.new_palette(mode, data)
def negative(mode="RGB"):
palette = list(range(256))
palette.reverse()
return ImagePalette(mode, palette * len(mode))
def random(mode="RGB"):
from random import randint
palette = []
@ -152,6 +158,7 @@ def random(mode="RGB"):
palette.append(randint(0, 255))
return ImagePalette(mode, palette)
def sepia(white="#fff0c0"):
r, g, b = ImageColor.getrgb(white)
r = _make_linear_lut(0, r)
@ -159,9 +166,11 @@ def sepia(white="#fff0c0"):
b = _make_linear_lut(0, b)
return ImagePalette("RGB", r + g + b)
def wedge(mode="RGB"):
return ImagePalette(mode, list(range(256)) * len(mode))
def load(filename):
# FIXME: supports GIMP gradients only