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# Copyright 2015 Sean Vig
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import mmap
import os
import sys
this_file = os.path.abspath(__file__)
this_dir = os.path.split(this_file)[0]
root_dir = os.path.split(this_dir)[0]
pywayland_dir = os.path.join(root_dir, "pywayland")
if os.path.exists(pywayland_dir):
sys.path.append(root_dir)
from pywayland.client import Display # noqa: E402
from pywayland.protocol.wayland import WlCompositor, WlShell, WlShm # noqa: E402
from pywayland.utils import AnonymousFile # noqa: E402
WIDTH = 480
HEIGHT = 256
MARGIN = 10
class Window:
def __init__(self):
self.buffer = None
self.compositor = None
self.shell = None
self.shm = None
self.shm_data = None
self.surface = None
self.line_pos = MARGIN
self.line_speed = +1
def shell_surface_ping_handler(shell_surface, serial):
shell_surface.pong(serial)
print("pinged/ponged")
def shm_format_handler(shm, format_):
if format_ == WlShm.format.argb8888.value:
s = "ARGB8888"
elif format_ == WlShm.format.xrgb8888.value:
s = "XRGB8888"
elif format_ == WlShm.format.rgb565.value:
s = "RGB565"
else:
s = "other format"
print(f"Possible shmem format: {s}")
def registry_global_handler(registry, id_, interface, version):
window = registry.user_data
if interface == "wl_compositor":
print("got compositor")
window.compositor = registry.bind(id_, WlCompositor, version)
elif interface == "wl_shell":
print("got shell")
window.shell = registry.bind(id_, WlShell, version)
elif interface == "wl_shm":
print("got shm")
window.shm = registry.bind(id_, WlShm, version)
window.shm.dispatcher["format"] = shm_format_handler
def registry_global_remover(registry, id_):
print(f"got a registry losing event for {id}")
def create_buffer(window):
stride = WIDTH * 4
size = stride * HEIGHT
with AnonymousFile(size) as fd:
window.shm_data = mmap.mmap(
fd, size, prot=mmap.PROT_READ | mmap.PROT_WRITE, flags=mmap.MAP_SHARED
)
pool = window.shm.create_pool(fd, size)
buff = pool.create_buffer(0, WIDTH, HEIGHT, stride, WlShm.format.argb8888.value)
pool.destroy()
return buff
def create_window(window):
window.buffer = create_buffer(window)
window.surface.attach(window.buffer, 0, 0)
window.surface.commit()
def redraw(callback, time, destroy_callback=True):
window = callback.user_data
if destroy_callback:
callback._destroy()
paint(window)
window.surface.damage(0, 0, WIDTH, HEIGHT)
callback = window.surface.frame()
callback.dispatcher["done"] = redraw
callback.user_data = window
window.surface.attach(window.buffer, 0, 0)
window.surface.commit()
def paint(window):
mm = window.shm_data
# clear
mm.seek(0)
mm.write(b"\xff" * 4 * WIDTH * HEIGHT)
# draw progressing line
mm.seek((window.line_pos * WIDTH + MARGIN) * 4)
mm.write(b"\x00\x00\x00\xff" * (WIDTH - 2 * MARGIN))
window.line_pos += window.line_speed
# maybe reverse direction of progression
if window.line_pos >= HEIGHT - MARGIN or window.line_pos <= MARGIN:
window.line_speed = -window.line_speed
def main():
window = Window()
display = Display()
display.connect()
print("connected to display")
registry = display.get_registry()
registry.dispatcher["global"] = registry_global_handler
registry.dispatcher["global_remove"] = registry_global_remover
registry.user_data = window
display.dispatch(block=True)
display.roundtrip()
if window.compositor is None:
raise RuntimeError("no compositor found")
elif window.shell is None:
raise RuntimeError("no shell found")
elif window.shm is None:
raise RuntimeError("no shm found")
window.surface = window.compositor.create_surface()
shell_surface = window.shell.get_shell_surface(window.surface)
shell_surface.set_toplevel()
shell_surface.dispatcher["ping"] = shell_surface_ping_handler
frame_callback = window.surface.frame()
frame_callback.dispatcher["done"] = redraw
frame_callback.user_data = window
create_window(window)
redraw(frame_callback, 0, destroy_callback=False)
while display.dispatch(block=True) != -1:
pass
import time
time.sleep(1)
display.disconnect()
if __name__ == "__main__":
main()
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