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#!/usr/bin/env python
import coloreffect
class C(coloreffect.ColorEffect):
def __init__(self):
coloreffect.ColorEffect.__init__(self)
self.OptionParser.add_option("--r",
action="store", type="string",
dest="rFunction", default="r",
help="red channel function")
self.OptionParser.add_option("--g",
action="store", type="string",
dest="gFunction", default="g",
help="green channel function")
self.OptionParser.add_option("--b",
action="store", type="string",
dest="bFunction", default="b",
help="blue channel function")
self.OptionParser.add_option("--tab",
action="store", type="string",
dest="tab",
help="The selected UI-tab when OK was pressed")
self.OptionParser.add_option("--scale",
action="store", type="string",
dest="scale",
help="The input (r,g,b) range")
def normalize(self, v):
if v<0:
return 0.0
if v > float(self.options.scale):
return float(self.options.scale)
return v
def _hexstr(self,r,g,b):
return '%02x%02x%02x' % (int(round(r)),int(round(g)),int(round(b)))
def colmod(self,_r,_g,_b):
factor = 255.0/float(self.options.scale)
r=float(_r)/factor
g=float(_g)/factor
b=float(_b)/factor
# add stuff to be accessible from within the custom color function here.
safeenv = {'__builtins__':{},'r':r,'g':g,'b':b}
try:
r2=self.normalize(eval(self.options.rFunction,safeenv))
g2=self.normalize(eval(self.options.gFunction,safeenv))
b2=self.normalize(eval(self.options.bFunction,safeenv))
except:
return self._hexstr(255.0,0.0,0.0)
return self._hexstr(r2*factor,g2*factor,b2*factor)
c = C()
c.affect()
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