샘플

ImageUtils.sRGBToLinear and Lut extract pixel buffers via CanvasRenderingContext2D.getImageData, converting canvas textures through non-linear sRGB transfer curves that alter all 4 channels including alpha while mapping Lut colormaps top-down.

sha256:9184d8c8837ecc45292b8217132201933dbc175211ff61705b8bf9789e269e7c

MIT-0

실행 증거

선언된 환경과 서명된 검증 실행을 분리해 이 샘플이 실제로 증명하는 범위를 보여줍니다.

선언된 환경 node linux x64 node node npm

환경	컨트랙트	단계	실행일
node 22 · linux alpine/x64 · docker ed25519:d91480838ac982c9	PASS	compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · node-typescript@1	2026-08-19
node 22 · linux alpine/x64 · docker ed25519:2175b912ea1c23b1	PASS	compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · node-typescript@1	2026-08-19

HOW

목표: ImageUtils.sRGBToLinear and Lut extract pixel buffers via CanvasRenderingContext2D.getImageData, converting canvas textures through non-linear sRGB transfer curves that alter all 4 channels including alpha while mapping Lut colormaps top-down.
패키지: three 0.185.1
심벌: CanvasRenderingContext2D.getImageData
환경: node
생성일: 2026-08-19T13:04:55Z

ImageUtils.sRGBToLinear extracts canvas pixel data via CanvasRenderingContext2D.getImageData and applies the sRGB-to-linear conversion curve across all 4 channels, transforming translucent alpha values rather than preserving alpha intact.
ImageUtils.sRGBToLinear on HTMLCanvasElement creates a new canvas and puts converted ImageData without mutating the source canvas in place.
ImageUtils.sRGBToLinear on raw byte buffers uses Math.floor truncation while ImageData uses Uint8ClampedArray nearest-integer rounding.
Lut.updateCanvas queries CanvasRenderingContext2D.getImageData for a 1xN buffer and populates color stops from top (y=0, i=1.0) to bottom (y=N-1, i=0.0) with full opacity (alpha=255).
ImageUtils.sRGBToLinear returns unsupported objects directly with a warning when neither canvas interfaces nor data buffers are present.