import sys

import numpy as np

from . import _backend_tk

from .backend_cairo import cairo, FigureCanvasCairo

from ._backend_tk import _BackendTk, FigureCanvasTk

class FigureCanvasTkCairo(FigureCanvasCairo, FigureCanvasTk):

def draw(self):

width = int(self.figure.bbox.width)

height = int(self.figure.bbox.height)

surface = cairo.ImageSurface(cairo.FORMAT_ARGB32, width, height)

self._renderer.set_context(cairo.Context(surface))

self._renderer.dpi = self.figure.dpi

self.figure.draw(self._renderer)

buf = np.reshape(surface.get_data(), (height, width, 4))

_backend_tk.blit(

self._tkphoto, buf,

(2, 1, 0, 3) if sys.byteorder == "little" else (1, 2, 3, 0))

@_BackendTk.export

class _BackendTkCairo(_BackendTk):

FigureCanvas = FigureCanvasTkCairo