@cornerstonejs/core/dist/esm/utilities/getScalingDescriptor.js

Cornerstone3D Core

import { isGenericViewport } from './viewportCapabilities.js';
import { getVolumeId } from './getVolumeId.js';
import { resolveGenericViewportVolumeId } from './resolveGenericViewportVolumeId.js';
function _getScalingDescriptor(viewport, targetId, getVolume) {
    if (!getVolume) {
        throw new Error('getVolume is required, use the utilities export instead');
    }
    if (isGenericViewport(viewport)) {
        const resolvedVolumeId = resolveGenericViewportVolumeId(viewport, targetId);
        const volume = resolvedVolumeId ? getVolume(resolvedVolumeId) : undefined;
        const imageData = viewport.getImageData?.();
        return {
            modality: volume?.metadata?.Modality ?? imageData?.metadata?.Modality,
            isPreScaled: isScalingPresent(volume?.scaling),
        };
    }
    if (typeof viewport.setVolumes === 'function') {
        const volumeViewport = viewport;
        const volumeId = targetId
            ? getVolumeId(targetId)
            : volumeViewport.getVolumeId();
        const volume = volumeId ? getVolume(volumeId) : undefined;
        return {
            modality: volume?.metadata?.Modality,
            isPreScaled: isScalingPresent(volume?.scaling),
        };
    }
    if (typeof viewport.setStack === 'function') {
        const stackViewport = viewport;
        const { preScale } = stackViewport.getImageData() || {};
        return {
            modality: stackViewport.modality,
            isPreScaled: !!preScale?.scaled,
        };
    }
    return undefined;
}
function isScalingPresent(scaling) {
    return !!scaling && Object.keys(scaling).length > 0;
}
export { _getScalingDescriptor };