本文整理匯總了Python中matplotlib._png.PNG_FILTER_NONE屬性的典型用法代碼示例。如果您正苦於以下問題：Python _png.PNG_FILTER_NONE屬性的具體用法？Python _png.PNG_FILTER_NONE怎麽用？Python _png.PNG_FILTER_NONE使用的例子？那麽, 這裏精選的屬性代碼示例或許可以為您提供幫助。您也可以進一步了解該屬性所在類matplotlib._png的用法示例。
在下文中一共展示了_png.PNG_FILTER_NONE屬性的1個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的Python代碼示例。
示例1: get_diff_image
# 需要導入模塊: from matplotlib import _png [as 別名]
# 或者: from matplotlib._png import PNG_FILTER_NONE [as 別名]
def get_diff_image(self):
if self._png_is_old:
renderer = self.get_renderer()
# The buffer is created as type uint32 so that entire
# pixels can be compared in one numpy call, rather than
# needing to compare each plane separately.
buff = (np.frombuffer(renderer.buffer_rgba(), dtype=np.uint32)
.reshape((renderer.height, renderer.width)))
# If any pixels have transparency, we need to force a full
# draw as we cannot overlay new on top of old.
pixels = buff.view(dtype=np.uint8).reshape(buff.shape + (4,))
if self._force_full or np.any(pixels[:, :, 3] != 255):
self.set_image_mode('full')
output = buff
else:
self.set_image_mode('diff')
last_buffer = (np.frombuffer(self._last_renderer.buffer_rgba(),
dtype=np.uint32)
.reshape((renderer.height, renderer.width)))
diff = buff != last_buffer
output = np.where(diff, buff, 0)
# TODO: We should write a new version of write_png that
# handles the differencing inline
buff = _png.write_png(
output.view(dtype=np.uint8).reshape(output.shape + (4,)),
None, compression=6, filter=_png.PNG_FILTER_NONE)
# Swap the renderer frames
self._renderer, self._last_renderer = (
self._last_renderer, renderer)
self._force_full = False
self._png_is_old = False
return buff