Files
sideline/engine/display/backends/null.py
David Gwilliam f5de2c62e0 feat(display): add reuse flag to Display protocol
- Add reuse parameter to Display.init() for all backends
- PygameDisplay: reuse existing SDL window via class-level flag
- TerminalDisplay: skip re-init when reuse=True
- WebSocketDisplay: skip server start when reuse=True
- SixelDisplay, KittyDisplay, NullDisplay: ignore reuse (not applicable)
- MultiDisplay: pass reuse to child displays
- Update benchmark.py to reuse pygame display for effect benchmarks
- Add test_websocket_e2e.py with e2e marker
- Register e2e marker in pyproject.toml
2026-03-16 00:30:52 -07:00

44 lines
1.1 KiB
Python

"""
Null/headless display backend.
"""
import time
class NullDisplay:
"""Headless/null display - discards all output.
This display does nothing - useful for headless benchmarking
or when no display output is needed.
"""
width: int = 80
height: int = 24
def init(self, width: int, height: int, reuse: bool = False) -> None:
"""Initialize display with dimensions.
Args:
width: Terminal width in characters
height: Terminal height in rows
reuse: Ignored for NullDisplay (no resources to reuse)
"""
self.width = width
self.height = height
def show(self, buffer: list[str]) -> None:
from engine.display import get_monitor
monitor = get_monitor()
if monitor:
t0 = time.perf_counter()
chars_in = sum(len(line) for line in buffer)
elapsed_ms = (time.perf_counter() - t0) * 1000
monitor.record_effect("null_display", elapsed_ms, chars_in, chars_in)
def clear(self) -> None:
pass
def cleanup(self) -> None:
pass