本文整理汇总了Python中rectangle.Rectangle.to_png方法的典型用法代码示例。如果您正苦于以下问题：Python Rectangle.to_png方法的具体用法？Python Rectangle.to_png怎么用？Python Rectangle.to_png使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类rectangle.Rectangle的用法示例。
在下文中一共展示了Rectangle.to_png方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: Flattener
# 需要导入模块: from rectangle import Rectangle [as 别名]
# 或者: from rectangle.Rectangle import to_png [as 别名]
class Flattener(Field):
def __init__(self, images, **kwargs):
"""Merge list of images.
Insert i-th image on (i-1)-th on specified position,
i = n, n-1, ..., 0.
This field is usefull for views to join Images (packed in ImageWrapper)
Args:
images (tuple): (ImageWrapper, (x, y)) image and it's position
relative to the background.
"""
super(Flattener, self).__init__(**kwargs)
self.images = images
max_width = max([image.get_width() + width for image, (width, height) in images])
max_height = max([image.get_height() + height for image, (width, height) in images])
self.background = Rectangle((max_width, max_height),
thickness=kwargs.get('thickness', 0))
def to_png(self):
def paste_pixels(pixel1, pixel2):
""" paste pixel2 on pixel1 """
r1, g1, b1, a1 = pixel1
r2, g2, b2, a2 = pixel2
if a1 and a2:
sub_merge = lambda x1, x2: x1 + (x2 - x1) * a2 / 255
r3 = sub_merge(r1, r2)
g3 = sub_merge(g1, g2)
b3 = sub_merge(b1, b2)
a3 = max(a1, a2)
return r3, g3, b3, a3
else:
if not a1:
return pixel2
else:
return pixel1
def transparent_paste(background, image, position):
width, height = image.size
for x in range(width):
for y in range(height):
pixel = image.getpixel((x, y))
background_position = position[0] + x, position[1] + y
try:
background_pixel = background.getpixel(background_position)
background.putpixel(background_position,
paste_pixels(background_pixel, pixel))
except IndexError:
# end of background image
break
background = self.background.to_png()
background_image = background.get_image()
for image, position in self.images:
transparent_paste(background_image, image.get_image(), map(self.pt_to_px, position))
background.set_image(background_image)
return background