openpdu-libs/usr/lib/python2.7/site-packages/oled/mixin.py

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2018-04-16 20:08:38 +00:00
# -*- coding: utf-8 -*-
# Copyright (c) 2016 Richard Hull and contributors
# See LICENSE.rst for details.
from PIL import Image
class capabilities(object):
def capabilities(self, width, height, rotate, mode="1"):
assert mode in ("1", "RGB", "RGBA")
assert rotate in (0, 1, 2, 3)
self._w = width
self._h = height
self.width = width if rotate % 2 == 0 else height
self.height = height if rotate % 2 == 0 else width
self.size = (self.width, self.height)
self.bounding_box = (0, 0, self.width - 1, self.height - 1)
self.rotate = rotate
self.mode = mode
def clear(self):
"""
Initializes the device memory with an empty (blank) image.
"""
self.display(Image.new(self.mode, self.size))
def preprocess(self, image):
if self.rotate == 0:
return image
angle = self.rotate * -90
return image.rotate(angle, expand=True).crop((0, 0, self._w, self._h))
def display(self, image):
raise NotImplementedError()