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# coding: UTF-8
# Copyright 2009, 2010 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
from gettext import gettext as _
import traceback
import sys
import random
import cairo
import ka_debug
import model_locus
import model_allele
import model_random
class BorderModifier(model_allele.Allele):
"""BorderModifier
inv: 0.0 <= self.border_weight <= 0.5
inv: self.border_alpha == 0.0 or self.border_alpha == 1.0
"""
constraint_wieght = (0.0, 0.5)
def __init__(self, trunk):
"""Constructor for a simple modifier."""
super(BorderModifier, self).__init__(trunk)
self.border_weight = 0.25
self.border_alpha = 1.0
self.constraint_weight = (0.0, 0.5)
def __eq__(self, other):
"""Equality based on same instance."""
equal = isinstance(other, BorderModifier) \
and self.border_weight == other.border_weight \
and self.border_alpha == other.border_alpha
return equal
def randomize(self):
"""No member variables. Nothing to do."""
self.border_weight = random.uniform(self.constraint_weight[0], self.constraint_weight[1])
self.border_alpha = 1.0 if random.randint(0, 1) > 0 else 0.0
def mutate(self):
"""No member variables. Nothing to do."""
if model_random.is_mutating():
self.border_weight = model_random.jitter_constrained(self.border_weight, self.constraint_weight)
if model_random.is_mutating():
self.border_alpha = 1.0 if random.randint(0, 1) > 0 else 0.0
def swap_places(self):
"""Nothing to do."""
def crossingover(self, other):
"""
pre: isinstance(other, BorderModifier)
pre: isinstance(self, BorderModifier)
# check for distinct references, needs to copy content, not references
post: __return__ is not self
post: __return__ is not other
post: model_locus.unique_check(__return__, self, other) == ''
"""
new_one = BorderModifier(self.get_trunk())
cross_sequence = model_random.crossing_sequence(2)
new_one.border_weight = self.border_weight if cross_sequence[0] else other.border_weight
new_one.border_alpha = self.border_alpha if cross_sequence[1] else other.border_alpha
return new_one
def render_single_layer(self, task, single_layer, single_treenode, ctx, width, height):
"""
pre: single_layer is not None
pre: ctx is not None
pre: width > 0
pre: height > 0
pre: width == height
"""
try:
# paint one layer
msk_surface = ctx.get_target().create_similar(cairo.CONTENT_ALPHA,
width, height)
msk_ctx = cairo.Context(msk_surface)
msk_width = msk_surface.get_width()
msk_height = msk_surface.get_height()
# fill the whole background with an alpha value.
msk_ctx.set_operator(cairo.OPERATOR_SOURCE)
msk_ctx.set_source_rgba(1.0, 1.0, 1.0, self.border_alpha)
msk_ctx.paint()
# fill the interior with an alpha value.
msk_ctx.set_operator(cairo.OPERATOR_SOURCE)
msk_ctx.set_source_rgba(1.0, 1.0, 1.0, 1.0-self.border_alpha)
msk_ctx.rectangle(self.border_weight*msk_width,
self.border_weight*msk_height,
(1.0-2.0*self.border_weight)*msk_width,
(1.0-2.0*self.border_weight)*msk_height)
msk_ctx.fill()
ctx.save()
# ka_debug.matrix_s(ctx.get_matrix())
single_layer.render(task, ctx, width, height)
# msk_surface.write_to_png('/dev/shm/mask_' + self.get_unique_id() + '.png')
ctx.mask_surface(msk_surface, -0.5*width, -0.5*height)
single_treenode.render(task, ctx, width, height)
# ka_debug.matrix_r(ctx.get_matrix())
ctx.restore()
except:
ka_debug.err('failed calculating [%s] [%s] [%s]' % \
(self.get_unique_id(), sys.exc_info()[0], sys.exc_info()[1]))
traceback.print_exc(file=sys.__stderr__)
# ka_debug.matrix(ctx.get_matrix())
def explain(self, task, formater, single_layer, single_treenode):
formater.text_item(_('Border modifier, border weight=')
+ unicode(self.border_weight) \
+ _(' alpha=') + unicode(self.border_alpha))
single_layer.explain(formater)
single_treenode.explain(task, formater)
def copy(self):
"""A copy constructor.
post: isinstance(__return__, BorderModifier)
# check for distinct references, needs to copy content, not references
post: __return__ is not self
"""
new_one = BorderModifier(self.get_trunk())
new_one.border_weight = self.border_weight
new_one.border_alpha = self.border_alpha
return new_one
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