OpenGL contextの消失への対応(WIP)

main.py

from __future__ import print_function
from kivy.config import Config
Config.set('kivy', 'pause_on_minimize', 1)
# Config.set('graphics', 'fullscreen', 1)
from kivy.app import App
from kivy.factory import Factory
from kivy.graphics.texture import Texture
import kivy.core.window
from sys import stderr


class TestApp(App):

    def build(self):
        texture = Texture.create(size=(2, 2, ), colorfmt='rgb')
        texture.blit_buffer(
            b'\xff\xff\xff'   # White
            b'\xff\x00\x00'   # Red
            b'\x00\xff\x00'   # Green
            b'\x00\x00\xff',  # Blue
            colorfmt='rgb')
        return Factory.Image(texture=texture, keep_ratio=False, allow_stretch=True)

    def on_pause(self):
        print('on_pause', file=stderr)
        return True

    def on_resume(self):
        print('on_resume', file=stderr)

    def on_start(self):
        print('on_start', file=stderr)

    def on_stop(self):
        print('on_stop', file=stderr)


if __name__ == '__main__':
    TestApp().run()