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Diffstat (limited to 'ep_merger_alphaimage.py')
| -rw-r--r-- | ep_merger_alphaimage.py | 116 |
1 files changed, 116 insertions, 0 deletions
diff --git a/ep_merger_alphaimage.py b/ep_merger_alphaimage.py new file mode 100644 index 0000000..7e0c052 --- /dev/null +++ b/ep_merger_alphaimage.py @@ -0,0 +1,116 @@ +# 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 +import ka_importer + +class AlphaImageMerger(model_allele.Allele): + """AlphaImageMerger + """ + constraint_wieght = (0.0, 0.5) + + def __init__(self, trunk): + """Constructor for a simple merger.""" + super(AlphaImageMerger, self).__init__(trunk) + self.selected_image = '' + + def __eq__(self, other): + """Equality based on same instance.""" + equal = isinstance(other, AlphaImageMerger) \ + and self.selected_image == other.selected_image + return equal + + def randomize(self): + """No member variables. Nothing to do.""" + image_list = ka_importer.get_alpha_image_list() + self.selected_image = image_list[random.randint(0, len(image_list)-1)] + + def mutate(self): + """No member variables. Nothing to do.""" + if ka_random.is_mutating(): + image_list = ka_importer.get_alpha_image_list() + self.selected_image = image_list[random.randint(0, len(image_list)-1)] + + def shuffle(self): + """No member variables. Nothing to do.""" + pass + + def crossingover(self, other): + """ + pre: isinstance(other, AlphaImageMerger) + pre: isinstance(self, AlphaImageMerger) + # check for distinct references, needs to copy content, not references + post: __return__ is not self + post: __return__ is not other + """ + new_one = AlphaImageMerger(self.get_trunk()) + cross_sequence = ka_random.crossing_sequence(1) + new_one.selected_image = self.selected_image if cross_sequence[0] \ + else other.selected_image + 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 = cairo.ImageSurface.create_from_png(self.selected_image) + 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, 0.0) + ctx.restore() + + single_layer.draw(ctx, width, height) + ctx.restore() + + def explain(self): + """ + post len(__return__) == 3 + """ + png_surface = cairo.ImageSurface.create_from_png(self.selected_image) + width = height = 48 + surface = cairo.ImageSurface(cairo.FORMAT_ARGB32, width, height) + ctx = cairo.Context(surface) + ctx.scale(width, height) + ctx.scale(1.0/png_surface.get_width(), 1.0/png_surface.get_height()) + ctx.set_source_surface(png_surface) + ctx.paint() + + return u'Transparent image merger, image ' \ + + unicode(self.selected_image), \ + surface, \ + self.selected_image + + def copy(self): + """A copy constructor. + post: isinstance(__return__, AlphaImageMerger) + # check for distinct references, needs to copy content, not references + post: __return__ is not self + """ + new_one = AlphaImageMerger(self.get_trunk()) + new_one.selected_image = self.selected_image + return new_one |