Basic test of python-mpv mpv render context mapping used with GTK

mpv_render_context_gtk_example.py

#!/usr/bin/env python3
import ctypes

import gi

gi.require_version('Gtk', '3.0')
from gi.repository import Gtk, GLib

gi.require_version('GL', '1.0')
from OpenGL import GL, GLX

from mpv import MPV, MpvRenderContext, OpenGlCbGetProcAddrFn


def get_process_address(_, name):
    address = GLX.glXGetProcAddress(name.decode("utf-8"))
    return ctypes.cast(address, ctypes.c_void_p).value


class MainClass(Gtk.Window):

    def __init__(self, media):
        super(MainClass, self).__init__()
        self.media = media
        self.set_default_size(600, 400)
        self.connect("destroy", self.on_destroy)

        frame = Gtk.Frame()
        self.area = OpenGlArea()
        self.area.connect("realize", self.play)
        frame.add(self.area)
        self.add(frame)
        self.show_all()

    def on_destroy(self, widget, data=None):
        Gtk.main_quit()

    def play(self, arg1):
        self.area.play(self.media)


class OpenGlArea(Gtk.GLArea):

    def __init__(self, **properties):
        super().__init__(**properties)

        self._proc_addr_wrapper = OpenGlCbGetProcAddrFn(get_process_address)

        self.ctx = None
        self.mpv = MPV()  # log_handler=print, loglevel='debug')

        self.connect("realize", self.on_realize)
        self.connect("render", self.on_render)
        self.connect("unrealize", self.on_unrealize)

    def on_realize(self, area):
        print('\033[91mon_realize called\033[0m')
        self.make_current()
        self.ctx = MpvRenderContext(self.mpv, 'opengl',
                                    opengl_init_params={'get_proc_address': self._proc_addr_wrapper})
        self.ctx.update_cb = self.wrapped_c_render_func

    def on_unrealize(self, arg):
        print('\033[91munrealize called\033[0m')
        self.ctx.free()
        self.mpv.terminate()

    def wrapped_c_render_func(self):
        print('\033[91mwrapped_c_render_func called\033[0m')
        GLib.idle_add(self.call_frame_ready, None, GLib.PRIORITY_HIGH)

    def call_frame_ready(self, *args):
        print('\033[91mcall_frame_ready called\033[0m')
        if self.ctx.update():
            self.queue_render()

    def on_render(self, arg1, arg2):
        print('\033[91mon_render called\033[0m')
        if self.ctx:
            factor = self.get_scale_factor()
            rect = self.get_allocated_size()[0]

            width = rect.width * factor
            height = rect.height * factor

            fbo = GL.glGetIntegerv(GL.GL_DRAW_FRAMEBUFFER_BINDING)
            self.ctx.render(flip_y=True, opengl_fbo={'w': width, 'h': height, 'fbo': fbo})
            return True
        return False

    def play(self, media):
        self.mpv.play(media)


if __name__ == '__main__':
    import locale

    locale.setlocale(locale.LC_NUMERIC, 'C')

    application = MainClass(media='test.webm')
    Gtk.main()

On Ubuntu 22.04.1:
I have the import error :
from mpv import MPV, MpvRenderContext,OpenGlCbGetProcAddrFn
ImportError: cannot import name 'OpenGlCbGetProcAddrFn' from 'mpv' (/home/jp/.local/lib/python3.10/site-packages/mpv.py)

On Ubuntu 20.04, it was OK !!!!

Thanks for your response

Please use the MpvGlGetProcAddressFn function instead. The usage is the same. 👍