def bake(self, shape, target=None, offset=(0, 0)):
"""Apply the transformation stack for each pixel in the given shape
Args:
- shape: Source shape object to be processed
- target [Optional]: optional target where final pixels are blitted into.
If target is not given, 'shape' is modified inplace. Defaults to None.
- offset: pixel-offset to blit the data to. Most useful with the target
option.
Returns:
the affected Shape object
"""
from terminedia.image import FullShape
if target:
source = shape
else:
# Creates a copy of all data channels, sans sprites neither transformers:
source = FullShape.promote(shape)
target = shape
# if target is shape, bad things will happen for some transformers - specially Kernel based transforms
offset = V2(offset)
for pos, pixel in source:
target[pos + offset] = self.process(source, pos, pixel)
return target
def _check_and_promote(self):
"""called at initialization to try to promote any object that is not a Shape
to a Shape.
"""
from terminedia.image import shape, Shape, FullShape
for index, item in enumerate(self.shapes):
if not isinstance(item, Shape):
item = shape(item)
if not isinstance(item, FullShape):
item = FullShape.promote(item)
self.shapes[index] = shape(item)
def _check_and_promote(self, shape_specs):
"""called at initialization to try to promote any object that is not a Shape
to a Shape.
"""
from terminedia.image import shape, Shape, FullShape
if isinstance(
shape_specs,
(str, Path, Shape, V2)) or (isinstance(shape_specs, Sequence)
and len(shape_specs) == 2
and isinstance(shape_specs[0], Real)):
shape_specs = [shape_specs]
shapes = []
for index, item in enumerate(shape_specs):
if not isinstance(item, Shape):
item = shape(item)
if not isinstance(item, FullShape):
item = FullShape.promote(item)
shapes.append(item)
return shapes