48 lines
1.4 KiB
Python
48 lines
1.4 KiB
Python
from logging import getLogger
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from typing import Optional
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from PIL import Image
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from ..params import ImageParams, StageParams, UpscaleParams
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from ..server import ServerContext
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from ..worker import WorkerContext
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from .stage import BaseStage
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logger = getLogger(__name__)
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class UpscaleSimpleStage(BaseStage):
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def run(
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self,
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_job: WorkerContext,
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_server: ServerContext,
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_stage: StageParams,
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_params: ImageParams,
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source: Image.Image,
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*,
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method: str,
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upscale: UpscaleParams,
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stage_source: Optional[Image.Image] = None,
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**kwargs,
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) -> Image.Image:
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source = stage_source or source
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if upscale.scale <= 1:
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logger.debug(
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"simple upscale stage run with scale of %s, skipping", upscale.scale
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)
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return source
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scaled_size = (source.width * upscale.scale, source.height * upscale.scale)
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if method == "bilinear":
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logger.debug("using bilinear interpolation for highres")
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source = source.resize(scaled_size, resample=Image.Resampling.BILINEAR)
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elif method == "lanczos":
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logger.debug("using Lanczos interpolation for highres")
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source = source.resize(scaled_size, resample=Image.Resampling.LANCZOS)
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else:
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logger.warning("unknown upscaling method: %s", method)
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return source
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