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ChuckandClaude Opus 5.5
9964dd2183
DisplayManager.offscreen() gives a thread its own canvas, so Vegas renders every plugin's ticker content on its prefetch thread instead of pausing the scroll for canvas-bound plugins on the render thread. A render gate (src/common/render_gate.py, vegas_scroll.prefetch_gate, on by default with the GIL-releasing binding) lets the prefetch thread run Python only while the render thread waits in SwapOnVSync: on hdpi, frames 2+ refreshes late fell eightfold and late frames overall from 0.90% to 0.60%. See docs/OFFSCREEN_RENDERING.md. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
42 lines
1.3 KiB
Python
42 lines
1.3 KiB
Python
"""vegas_scroll.switch_interval_ms: applied for a Vegas run, restored after."""
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import sys
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from pathlib import Path
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sys.path.insert(0, str(Path(__file__).resolve().parent.parent))
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from src.vegas_mode.config import VegasModeConfig # noqa: E402
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from src.vegas_mode.coordinator import VegasModeCoordinator # noqa: E402
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def _coordinator(ms):
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c = VegasModeCoordinator.__new__(VegasModeCoordinator)
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c.vegas_config = VegasModeConfig(switch_interval_ms=ms)
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return c
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def test_applied_for_the_run_and_restored_after():
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before = sys.getswitchinterval()
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c = _coordinator(1.0)
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try:
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c._apply_switch_interval()
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assert abs(sys.getswitchinterval() - 0.001) < 1e-9
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c._apply_switch_interval() # a second start must not lose the original
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finally:
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c._restore_switch_interval()
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assert sys.getswitchinterval() == before
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def test_zero_leaves_the_interpreter_alone():
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before = sys.getswitchinterval()
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c = _coordinator(0.0)
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c._apply_switch_interval()
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c._restore_switch_interval()
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assert sys.getswitchinterval() == before
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def test_read_from_config():
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config = VegasModeConfig.from_config(
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{"display": {"vegas_scroll": {"switch_interval_ms": 1}}})
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assert config.switch_interval_ms == 1.0
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assert VegasModeConfig.from_config({"display": {"vegas_scroll": {}}}).switch_interval_ms == 0.0
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