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#!/usr/bin/python
#
# examples/xdamage.py -- demonstrate damage extension
#
# Copyright (C) 2019 Mohit Garg <mrmohitgarg1990@gmail.com>
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public License
# as published by the Free Software Foundation; either version 2.1
# of the License, or (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
# See the GNU Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the
# Free Software Foundation, Inc.,
# 59 Temple Place,
# Suite 330,
# Boston, MA 02111-1307 USA
# Python 2/3 compatibility.
from __future__ import print_function
import sys
import os
# Change path so we find Xlib
sys.path.append(os.path.join(os.path.dirname(__file__), '..'))
from Xlib import display, X, threaded,Xutil
import time
try:
import thread
except ModuleNotFoundError:
import _thread as thread
from Xlib.ext import damage
from PIL import Image, ImageTk
import traceback
def redraw(win, gc):
# win.clear_area()
win.fill_rectangle(gc, 0, 0, 60, 60)
def blink(display, win, gc, cols):
while 1:
time.sleep(2)
print('Changing color', cols[0])
gc.change(foreground = cols[0])
cols = (cols[1], cols[0])
redraw(win, gc)
display.flush()
def get_image_from_win(win, pt_w, pt_h, pt_x=0, pt_y=0):
try:
raw = win.get_image(pt_x, pt_y, pt_w, pt_h, X.ZPixmap, 0xffffffff)
image = Image.frombytes("RGB", (pt_w, pt_h), raw.data, "raw", "BGRX")
return image
except Exception:
traceback.print_exc()
def check_ext(disp):
# Check for extension
if not disp.has_extension('DAMAGE'):
sys.stderr.write('server does not have the DAMAGE extension\n')
sys.stderr.write("\n".join(disp.list_extensions()))
if disp.query_extension('DAMAGE') is None:
sys.exit(1)
else:
r = disp.damage_query_version()
print('DAMAGE version {}.{}'.format(r.major_version, r.minor_version))
def main():
d = display.Display()
root = d.screen().root
check_ext(d)
colormap = d.screen().default_colormap
red = colormap.alloc_named_color("red").pixel
blue = colormap.alloc_named_color("blue").pixel
background = colormap.alloc_named_color("white").pixel
window1 = root.create_window(100, 100, 250, 100, 1,
X.CopyFromParent, X.InputOutput,
X.CopyFromParent,
background_pixel = background,
event_mask = X.StructureNotifyMask | X.ExposureMask)
window1.set_wm_name('Changing Window')
window1.map()
gc = window1.create_gc(foreground = red)
thread.start_new_thread(blink, (d, window1, gc, (blue, red)))
window1.damage_create(damage.DamageReportRawRectangles)
window1.set_wm_normal_hints(
flags=(Xutil.PPosition | Xutil.PSize | Xutil.PMinSize),
min_width=50,
min_height=50
)
window2 = root.create_window(100, 250, 250, 100, 1,
X.CopyFromParent, X.InputOutput,
X.CopyFromParent,
background_pixel = background,
event_mask = X.StructureNotifyMask | X.ExposureMask)
window2.set_wm_normal_hints(
flags=(Xutil.PPosition | Xutil.PSize | Xutil.PMinSize),
min_width=50,
min_height=50
)
window2.set_wm_name('Tracking Window')
window2.map()
while 1:
event = d.next_event()
if event.type == X.Expose:
if event.count == 0:
redraw(window1, gc)
elif event.type == d.extension_event.DamageNotify:
image = get_image_from_win(window1, event.area.width, event.area.height, event.area.x, event.area.y)
bgpm = window2.create_pixmap(image.width, image.height, d.screen().root_depth)
bggc = window2.create_gc(foreground=0, background=0)
bgpm.put_pil_image(bggc, 0, 0, image)
window2.copy_area(bggc, bgpm, 0, 0, image.width, image.height, 0, 0)
# bggc.free()
elif event.type == X.DestroyNotify:
sys.exit(0)
if __name__ == "__main__":
main()
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