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mask_pixel.py
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| #!/usr/bin/env python3 | |
| import signal | |
| import sys | |
| import time | |
| from contextlib import suppress | |
| from Xlib import X, Xatom, display | |
| X_COORD, Y_COORD = 100, 100 | |
| d = display.Display() | |
| root = d.screen().root | |
| atom_opacity = d.intern_atom("_NET_WM_WINDOW_OPACITY", only_if_exists=False) | |
| orig_w = orig_h = 2 | |
| pad_x = pad_y = 3 | |
| total_w = orig_w + pad_x * 2 | |
| total_h = orig_h + pad_y * 2 | |
| win_x = X_COORD - (orig_w // 2) - pad_x | |
| win_y = Y_COORD - (orig_h // 2) - pad_y | |
| CENTER_OPACITY = 0x33333333 | |
| EDGE_OPACITY = 0x05050505 | |
| def lerp(a, b, t): | |
| return int(a + (b - a) * t) | |
| cx0, cx1 = pad_x, pad_x + orig_w - 1 | |
| cy0, cy1 = pad_y, pad_y + orig_h - 1 | |
| def factor(idx, lo, hi, pad): | |
| if lo <= idx <= hi: | |
| return 1.0 | |
| dist = lo - idx if idx < lo else idx - hi | |
| return max(0.0, 1.0 - dist / float(pad)) | |
| h_factors = [factor(cx, cx0, cx1, pad_x) for cx in range(total_w)] | |
| v_factors = [factor(cy, cy0, cy1, pad_y) for cy in range(total_h)] | |
| cell_windows = [] | |
| depth = d.screen().root_depth | |
| bg = 0x000000 | |
| for cx, hf in enumerate(h_factors): | |
| x = win_x + cx | |
| for cy, vf in enumerate(v_factors): | |
| opacity = lerp(EDGE_OPACITY, CENTER_OPACITY, hf * vf) | |
| w = root.create_window( | |
| x, | |
| win_y + cy, | |
| 1, | |
| 1, | |
| 0, | |
| depth, | |
| X.InputOutput, | |
| X.CopyFromParent, | |
| background_pixel=bg, | |
| override_redirect=True, | |
| ) | |
| w.change_property(atom_opacity, Xatom.CARDINAL, 32, [opacity]) | |
| w.map() | |
| cell_windows.append(w) | |
| d.sync() | |
| def cleanup(*_): | |
| with suppress(Exception): | |
| for w in cell_windows: | |
| with suppress(Exception): | |
| w.unmap() | |
| w.destroy() | |
| d.sync() | |
| sys.exit(0) | |
| signal.signal(signal.SIGINT, cleanup) | |
| signal.signal(signal.SIGTERM, cleanup) | |
| try: | |
| while True: | |
| time.sleep(1) | |
| except KeyboardInterrupt: | |
| cleanup() |
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