forked from genewildish/Mainline
59 lines
1.6 KiB
Python
59 lines
1.6 KiB
Python
"""Adapter for camera stage."""
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import time
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from typing import Any
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from engine.pipeline.core import DataType, PipelineContext, Stage
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class CameraStage(Stage):
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"""Adapter wrapping Camera as a Stage."""
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def __init__(self, camera, name: str = "vertical"):
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self._camera = camera
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self.name = name
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self.category = "camera"
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self.optional = True
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self._last_frame_time: float | None = None
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@property
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def stage_type(self) -> str:
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return "camera"
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@property
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def capabilities(self) -> set[str]:
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return {"camera"}
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@property
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def dependencies(self) -> set[str]:
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return {"render.output"}
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@property
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def inlet_types(self) -> set:
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return {DataType.TEXT_BUFFER}
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@property
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def outlet_types(self) -> set:
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return {DataType.TEXT_BUFFER}
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def process(self, data: Any, ctx: PipelineContext) -> Any:
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"""Apply camera transformation to items."""
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if data is None:
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return data
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current_time = time.perf_counter()
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dt = 0.0
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if self._last_frame_time is not None:
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dt = current_time - self._last_frame_time
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self._camera.update(dt)
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self._last_frame_time = current_time
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ctx.set_state("camera_y", self._camera.y)
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ctx.set_state("camera_x", self._camera.x)
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if hasattr(self._camera, "apply"):
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viewport_width = ctx.params.viewport_width if ctx.params else 80
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viewport_height = ctx.params.viewport_height if ctx.params else 24
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return self._camera.apply(data, viewport_width, viewport_height)
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return data
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