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@osdlabel/viewer-api

v0.21.0

Published

a day ago

Viewer state types for osdlabel — cell transforms, UI state, and keyboard shortcut mappings.

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@osdlabel/viewer-api

Viewer state types and utilities for osdlabel, a web-based image annotation library for gigapixel/DZI images.

Depends only on @osdlabel/annotation. No framework dependencies.

Installation

npm install @osdlabel/viewer-api

What's inside

ImageId (branded id), createImageId, ImageIdFields extension interface
ImageSource — describes a tile source / image to annotate
PixelSpacing — physical calibration for measurements
AnnotationState<E> and getAllAnnotationsFlat
CellTransform, DEFAULT_CELL_TRANSFORM — per-cell view state: rotation, flippedH / flippedV, and the tonal fields exposure, contrast (both -1–1, 0 = unchanged) and inverted
ViewerControlId — identifies a drag-driven viewer control (currently tone, the two-axis exposure/contrast gesture)
UIState, KeyboardShortcutMap

Usage

import {
  type ImageSource,
  type AnnotationState,
  createImageId,
  getAllAnnotationsFlat,
} from '@osdlabel/viewer-api';

const image: ImageSource = {
  id: createImageId('slide-1'),
  tileSource: 'https://example.com/slides/slide-1.dzi',
  label: 'Slide 1',
};

License

BSD-3-Clause. Part of the osdlabel monorepo.