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Diffstat (limited to 'ep_merger_layermask.py')
| -rw-r--r-- | ep_merger_layermask.py | 134 |
1 files changed, 134 insertions, 0 deletions
diff --git a/ep_merger_layermask.py b/ep_merger_layermask.py new file mode 100644 index 0000000..98272e5 --- /dev/null +++ b/ep_merger_layermask.py @@ -0,0 +1,134 @@ +# 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 random +import cairo +import model_allele +import ka_random + +class LayermaskMerger(model_allele.Allele): + """LayermaskMerger + inv: self.scale_x >= 1.0 + inv: self.scale_y >= 1.0 + """ + + def __init__(self, trunk): + """Constructor for a simple merger.""" + super(LayermaskMerger, self).__init__(trunk) + self.scale_x = 1.0 + self.scale_y = 1.0 + self.constraint_scale = (1.0, 2.5) + + def __eq__(self, other): + """Equality based on same instance.""" + equal = isinstance(other, LayermaskMerger) \ + and self.scale_x == other.scale_x \ + and self.scale_y == other.scale_y + return equal + + def randomize(self): + """No member variables. Nothing to do.""" + self.scale_x = random.uniform(self.constraint_scale[0], self.constraint_scale[1]) + self.scale_y = random.uniform(self.constraint_scale[0], self.constraint_scale[1]) + + def mutate(self): + """No member variables. Nothing to do.""" + if ka_random.is_mutating(): + self.scale_x += ka_random.jitter_constrained(self.constraint_scale) + self.scale_x = ka_random.limitate_range(self.scale_x, self.constraint_scale[0], self.constraint_scale[1]) + if ka_random.is_mutating(): + self.scale_y += ka_random.jitter_constrained(self.constraint_scale) + self.scale_y = ka_random.limitate_range(self.scale_y, self.constraint_scale[0], self.constraint_scale[1]) + + def shuffle(self): + """No member variables. Nothing to do.""" + pass + + def crossingover(self, other): + """ + pre: isinstance(other, LayermaskMerger) + pre: isinstance(self, LayermaskMerger) + # check for distinct references, needs to copy content, not references + post: __return__ is not self + post: __return__ is not other + """ + new_one = LayermaskMerger(self.get_trunk()) + cross_sequence = ka_random.crossing_sequence(2) + new_one.scale_x = self.scale_x if cross_sequence[0] else other.scale_x + new_one.scale_y = self.scale_y if cross_sequence[1] else other.scale_y + return new_one + + def draw_single_layer(self, single_layer, mask_layer, ctx, width, height): + """ + pre: single_layer is not None + pre: ctx is not None + pre: width > 0 + pre: height > 0 + pre: width == height + """ + # paint one layer + ctx.save() + msk_surface = ctx.get_target().create_similar(cairo.CONTENT_ALPHA, + width, height) + # draw mask. + msk_ctx = cairo.Context(msk_surface) + sx, sy = self.scale_x**2, self.scale_y**2 +# sx, sy = 2.5**2, 2.5**2 + msk_ctx.scale(sx*width, sy*height) +# msk_ctx.translate(0.5-0.5/sx, 0.5-0.5/sy) + msk_ctx.translate(0.5/sx, 0.5/sy) + + # draw mask background + msk_ctx.set_operator(cairo.OPERATOR_SOURCE) + msk_ctx.set_source_rgba(0.0, 0.0, 0.0, 0.5) + msk_ctx.paint() + # draw mask layer + msk_ctx.set_operator(cairo.OPERATOR_SOURCE) + mask_layer.draw(msk_ctx, width, height) +# dummy = ep_layer_referencepattern.ReferencePattern(self.path+'/TODO') +# dummy.operator = cairo.OPERATOR_SOURCE +# dummy.draw(msk_ctx, width, height) +# msk_surface.write_to_png('/dev/shm/TODO.png') + + ctx.save() + ctx.translate(-0.5, -0.5) + ctx.scale(1.0/msk_surface.get_width(), 1.0/msk_surface.get_height()) + ctx.mask_surface(msk_surface, 0, 0) + ctx.restore() + + single_layer.draw(ctx, width, height) + ctx.restore() + + def explain(self): + """ + post len(__return__) == 3 + """ + return 'Layermask merger, scale_x**2=' + unicode(self.scale_x**2) \ + + u' scale_y**2=' + unicode(self.scale_y**2), \ + None, \ + None + + def copy(self): + """A copy constructor. + post: isinstance(__return__, LayermaskMerger) + # check for distinct references, needs to copy content, not references + post: __return__ is not self + """ + new_one = LayermaskMerger(self.get_trunk()) + new_one.scale_x = self.scale_x + new_one.scale_y = self.scale_y + return new_one |