def do_effect(self, painting):
"""Process an image so that it is made up of circles.
This method processes an image so that it is made up of circles
of a supplied radius, on top of a given background colour.
The color of the circles correspond to the pixel that would have
been at its centre.
Arguments:
painting -- the painting.Painting that the effect should be applied to
"""
distance_between_centres = self.diameter + self.gap
# Half of distance so that circles fully visible on top and left edges
first_centre = distance_between_centres/2
canvas = painting.copy()
canvas.clear_image(self.background)
for x in range(first_centre, painting.width, distance_between_centres):
for y in range(first_centre, painting.height, distance_between_centres):
centre = point.Point(x, y)
centre_color = painting.get_pixel_color(centre)
circle = shape.Circle(centre, self.radius, centre_color)
circle.draw(canvas)
painting.img = canvas
def do_effect(self, painting):
"""Process an image so that it is made up of circles.
This method processes an image so that it is made up of circles
of a supplied radius, on top of a given background colour.
The color of the circles correspond to the pixel that would have
been at its centre.
Arguments:
painting -- the painting.Painting that the effect should be applied to
"""
distance_between_centres = self.diameter + self.gap
# Half of distance so that circles fully visible on top and left edges
first_centre = distance_between_centres / 2
canvas = painting.copy()
canvas.clear_image(self.background)
for x in range(first_centre, painting.width, distance_between_centres):
for y in range(first_centre, painting.height,
distance_between_centres):
centre = point.Point(x, y)
centre_color = painting.get_pixel_color(centre)
circle = shape.Circle(centre, self.radius, centre_color)
circle.draw(canvas)
painting.img = canvas
def __change_rest_to_black(self, painting):
"""Change the remaining pixels to black.
This method changes the colour of any pixel that
isn't one of the replacement_colors to black.
Arguments:
painting -- the painting.Painting to be processed
"""
for x in range(painting.width):
for y in range(painting.height):
current_coordinate = point.Point(x, y)
current_pixel_color = painting.get_pixel_color(current_coordinate)
if current_pixel_color not in self.replacement_colors:
painting.set_pixel_color(current_coordinate, color.Color(*color.BLACK))
def __change_rest_to_black(self, painting):
"""Change the remaining pixels to black.
This method changes the colour of any pixel that
isn't one of the replacement_colors to black.
Arguments:
painting -- the painting.Painting to be processed
"""
for x in range(painting.width):
for y in range(painting.height):
current_coordinate = point.Point(x, y)
current_pixel_color = painting.get_pixel_color(
current_coordinate)
if current_pixel_color not in self.replacement_colors:
painting.set_pixel_color(current_coordinate,
color.Color(*color.BLACK))
def __change_dominant_color(self, current_component_index, painting):
"""Change the pixel to the appropriate replacement colour.
This method changes the colour of the pixel to the replacement
colour corresponding to the dominant colour component of the pixel.
Arguments:
current_component_index -- the index of the RGB colour component to be checked
painting -- the Painting to be processed
"""
for x in range(painting.width):
for y in range(painting.height):
current_coordinate = point.Point(x, y)
current_pixel_color = painting.get_pixel_color(current_coordinate)
can_change = self.__check_dominant_color(current_pixel_color, current_component_index)
if can_change:
painting.set_pixel_color(current_coordinate, self.replacement_colors[current_component_index])
def __change_dominant_color(self, current_component_index, painting):
"""Change the pixel to the appropriate replacement colour.
This method changes the colour of the pixel to the replacement
colour corresponding to the dominant colour component of the pixel.
Arguments:
current_component_index -- the index of the RGB colour component to be checked
painting -- the Painting to be processed
"""
for x in range(painting.width):
for y in range(painting.height):
current_coordinate = point.Point(x, y)
current_pixel_color = painting.get_pixel_color(
current_coordinate)
can_change = self.__check_dominant_color(
current_pixel_color, current_component_index)
if can_change:
painting.set_pixel_color(
current_coordinate,
self.replacement_colors[current_component_index])
