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# coding: UTF8
# Copyright 2009 Thomas Jourdan
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
import time
import random
import cairo
import ka_random
import model_allele
import model_constraintpool
# Cairo's compositing operators
# OPERATOR_ADD = 12
# OPERATOR_ATOP = 5
# OPERATOR_CLEAR = 0
# OPERATOR_DEST = 6
# OPERATOR_DEST_ATOP = 10
# OPERATOR_DEST_IN = 8
# OPERATOR_DEST_OUT = 9
# OPERATOR_DEST_OVER = 7
# OPERATOR_IN = 3
# OPERATOR_OUT = 4
# OPERATOR_OVER = 2
# OPERATOR_SATURATE = 13
# OPERATOR_SOURCE = 1
# OPERATOR_XOR = 11
#OPERATORS = [operator for operator in range(cairo.OPERATOR_SATURATE+1)]
#
OPERATOR_CONSTRAINT = 'operatorconstraint'
class Layer(model_allele.Allele):
"""Layer
inv: cairo.OPERATOR_CLEAR <= self.operator <= cairo.OPERATOR_SATURATE
"""
base_cdef = [{'bind' : OPERATOR_CONSTRAINT,
'name' : 'Permitted operators for combining two layers',
'domain': model_constraintpool.INT_M_OF_N,
'enum' : [('add', cairo.OPERATOR_ADD),
('atop', cairo.OPERATOR_ATOP),
# ('clear', cairo.OPERATOR_CLEAR),
# ('destination', cairo.OPERATOR_DEST),
('destination atop', cairo.OPERATOR_DEST_ATOP),
('destination in', cairo.OPERATOR_DEST_IN),
('destination out', cairo.OPERATOR_DEST_OUT),
# ('destination over', cairo.OPERATOR_DEST_OVER),
# ('in', cairo.OPERATOR_IN),
('out', cairo.OPERATOR_OUT),
('over', cairo.OPERATOR_OVER),
# ('saturate', cairo.OPERATOR_SATURATE),
('source', cairo.OPERATOR_SOURCE),
('xor', cairo.OPERATOR_XOR),],},
]
OPERATORS = [o[1] for o in base_cdef[0]['enum']]
# OPERATOR_NAMES = [o[0] for o in base_cdef[0]['enum']]
OPERATOR_NAMES = {
cairo.OPERATOR_ADD: 'ADD',
cairo.OPERATOR_ATOP: 'ATOP',
cairo.OPERATOR_CLEAR: 'CLEAR',
cairo.OPERATOR_DEST: 'DEST',
cairo.OPERATOR_DEST_ATOP: 'DEST_ATOP',
cairo.OPERATOR_DEST_IN: 'DEST_IN',
cairo.OPERATOR_DEST_OUT: 'DEST_OUT',
cairo.OPERATOR_DEST_OVER: 'DEST_OVER',
cairo.OPERATOR_IN: 'IN',
cairo.OPERATOR_OUT: 'OUT',
cairo.OPERATOR_OVER: 'OVER',
cairo.OPERATOR_SATURATE: 'SATURATE',
cairo.OPERATOR_SOURCE: 'SOURCE',
cairo.OPERATOR_XOR: 'XOR',
}
def __init__(self, trunk):
"""Layer constructor"""
super(Layer, self).__init__(trunk)
self.seed = 1512
self.operator = cairo.OPERATOR_OVER
def __eq__(self, other):
"""Equality based on the cells color components."""
equal = isinstance(other, Layer) \
and self.seed == other.seed \
and self.operator == other.operator
return equal
def randomize(self):
"""Randomize the layers components."""
cpool = model_constraintpool.ConstraintPool.get_pool()
self.seed = random.randint(1, 65535)
operator_constraint = cpool.get(self, OPERATOR_CONSTRAINT)
self.operator = random.choice(operator_constraint)
def mutate(self):
"""Make small random changes to the layers components."""
if ka_random.is_mutating():
cpool = model_constraintpool.ConstraintPool.get_pool()
operator_constraint = cpool.get(self, OPERATOR_CONSTRAINT)
self.operator = random.choice(operator_constraint)
def shuffle(self):
"""Shuffle similar componets.
For example exchange foreground and background color."""
def crossingover(self, other):
"""
"""
raise TypeError("Layer is an abstract class. Call crossingover() on sub classes only.")
def crossingover_base(self, new_one, other, cross_lenght):
"""
pre: isinstance(new_one, Layer)
pre: isinstance(other, Layer)
pre: cross_lenght >= 0
"""
cross_sequence = ka_random.crossing_sequence(cross_lenght + 2)
if cross_sequence[cross_lenght]:
new_one.seed = self.seed
else:
new_one.seed = other.seed
if cross_sequence[cross_lenght+1]:
new_one.operator = self.operator
else:
new_one.operator = other.operator
return cross_sequence
def draw(self, ctx, width, height):
raise TypeError("Layer is an abstract class. Call draw() on sub classes only.")
def begin_draw(self, ctx, width, height):
"""
pre: ctx is not None
pre: width > 0
pre: height > 0
pre: width == height
"""
time.sleep(0.001) # Python can not set thread priorities.
# Workaround: regularly released the global inter-
# preter lock GIL to give the GUI Thread a chance.
ctx.set_operator(self.operator)
def explain(self, formater):
formater.text_item('Compositing drawing operator: ' \
+ Layer.OPERATOR_NAMES[self.operator])
def copy(self):
raise TypeError("Layer is an abstract class. Call copy() on sub classes only.")
def copy_base(self, new_one):
"""The layers copy constructor
pre: isinstance(new_one, Layer)
"""
new_one.seed = self.seed
new_one.operator = self.operator
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