import coloreffect
import os
import math
import sys
import inkex

palette=[]


#loads lliurex palette
def load_palette(pal_name):
	if os.path.exists("/usr/share/inkscape/palettes/"+pal_name):
		f=open("/usr/share/inkscape/palettes/"+pal_name)
	
		lines=f.readlines()
		for line in lines:
			tmp=line.split()
			if len(tmp)>3:
				c=(int(tmp[0]),int(tmp[1]),int(tmp[2]))
				palette.append(c)

		
		f.close()



class C(coloreffect.ColorEffect):
	
	def __init__(self):
		coloreffect.ColorEffect.__init__(self)
		self.OptionParser.add_option('--type',  type = 'string', dest = 'pal_name', default = 'llx-gartoon.gpl')
		opt,args=self.OptionParser.parse_args()
		load_palette(opt.pal_name)
	
	def colmod(self,r,g,b):
		best=None
		best_dist=1000000

		#palette lookup
		for color in palette:
			ar,ag,ab=color
			#color differential
			dr=ar-r
			dg=ag-g
			db=ab-b
			#color square dist
			dist=(dr*dr)+(dg*dg)+(db*db)
			#euclidean dist
			dist=math.sqrt(dist)
			if dist<best_dist:
				best_dist=dist
				best=color

		cr,cg,cb=best
		return '%02x%02x%02x' % (cr,cg,cb)
		

	

#load_palette()
c = C()
c.affect()