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import { cache as cs3DCache, Enums, volumeLoader } from '@cornerstonejs/core';
import getCornerstoneViewportType from '../../utils/getCornerstoneViewportType';
import { loadDisplaySetData } from '../../utils/loadDisplaySetData';
import { StackViewportData, VolumeViewportData } from '../../types/CornerstoneCacheService';
import { VOLUME_LOADER_SCHEME } from '../../constants';
class CornerstoneCacheService {
static REGISTRATION = {
name: 'cornerstoneCacheService',
altName: 'CornerstoneCacheService',
create: ({ servicesManager }: Types.Extensions.ExtensionParams): CornerstoneCacheService => {
return new CornerstoneCacheService(servicesManager);
},
};
stackImageIds: Map<string, string[]> = new Map();
volumeImageIds: Map<string, string[]> = new Map();
readonly servicesManager: AppTypes.ServicesManager;
constructor(servicesManager: AppTypes.ServicesManager) {
this.servicesManager = servicesManager;
}
public getCacheSize() {
return cs3DCache.getCacheSize();
}
public getCacheFreeSpace() {
return cs3DCache.getBytesAvailable();
}
public async createViewportData(
displaySets: Types.DisplaySet[],
viewportOptions: AppTypes.ViewportGrid.GridViewportOptions,
dataSource: unknown,
initialImageIndex?: number
): Promise<StackViewportData | VolumeViewportData> {
const viewportType = viewportOptions.viewportType as string;
const cs3DViewportType = getCornerstoneViewportType(viewportType, displaySets);
let viewportData: StackViewportData | VolumeViewportData;
// Native Generic ("next") viewport types (e.g. PLANAR_NEXT) intentionally
// collapse the stack/volume distinction into a single type, so they cannot
// drive the stack-vs-volume data-builder decision below. Resolve the data
// shape from the legacy mapping (which preserves that distinction) and keep
// the resolved native type as the produced viewportData's viewportType.
let dataShapeType = getCornerstoneViewportType(viewportType, displaySets, false);
// A data overlay (fusion) of two or more reconstructable image display sets
// must render as a volume viewport so the source and overlay share one
// representation (volume slice). Without this, a next (PLANAR_NEXT) viewport
// keeps the source in vtkImage (stack) mode while the added overlay is a
// vtkVolumeSlice, producing the broken/unstable fusion. SEG/RT overlays are
// non-reconstructable, so they are not affected.
//
// Scoped to the native (PLANAR_NEXT) path via cs3DViewportType — NOT the flag, and
// NOT the legacy lane: a legacy stack-shaped reconstructable overlay must keep its
// existing stack build so the flag-off path stays byte-identical.
const isReconstructableFusion =
displaySets.length > 1 && displaySets.every(ds => ds.isReconstructable);
if (
isReconstructableFusion &&
dataShapeType === Enums.ViewportType.STACK &&
cs3DViewportType === Enums.ViewportType.PLANAR_NEXT
) {
dataShapeType = Enums.ViewportType.ORTHOGRAPHIC;
}
if (
dataShapeType === Enums.ViewportType.ORTHOGRAPHIC ||
dataShapeType === Enums.ViewportType.VOLUME_3D
) {
viewportData = await this._getVolumeViewportData(dataSource, displaySets, cs3DViewportType);
} else if (dataShapeType === Enums.ViewportType.STACK) {
// Everything else looks like a stack
viewportData = await this._getStackViewportData(
dataSource,
displaySets,
initialImageIndex,
cs3DViewportType
);
} else {
viewportData = await this._getOtherViewportData(
dataSource,
displaySets,
initialImageIndex,
cs3DViewportType
);
}
viewportData.viewportType = cs3DViewportType;
// Persist the legacy stack/volume shape so consumers can distinguish stack from
// volume content even when viewportType is a native Generic type (PLANAR_NEXT).
viewportData.dataShapeType = dataShapeType;
return viewportData;
}
public async invalidateViewportData(
viewportData: VolumeViewportData | StackViewportData,
invalidatedDisplaySetInstanceUID: string,
dataSource,
displaySetService
): Promise<VolumeViewportData | StackViewportData> {
// Decide stack-vs-volume rebuild from the persisted data shape, NOT viewportType:
// native viewports collapse both onto PLANAR_NEXT, so a native stack would
// otherwise fall through to the volume rebuild and re-mount as volume data.
// Falls back to viewportType for legacy/older viewportData (byte-identical off-path).
const dataShapeType = viewportData.dataShapeType ?? viewportData.viewportType;
Iif (dataShapeType === Enums.ViewportType.STACK) {
const displaySet = displaySetService.getDisplaySetByUID(invalidatedDisplaySetInstanceUID);
const imageIds = this._getCornerstoneStackImageIds(displaySet, dataSource);
// remove images from the cache to be able to re-load them
imageIds.forEach(imageId => {
Iif (cs3DCache.getImageLoadObject(imageId)) {
cs3DCache.removeImageLoadObject(imageId);
}
});
return {
// Preserve the original viewportType (legacy STACK or native PLANAR_NEXT);
// the rebuilt data shape, not this field, drives the native re-mount dispatch.
viewportType: viewportData.viewportType,
dataShapeType: Enums.ViewportType.STACK,
data: {
StudyInstanceUID: displaySet.StudyInstanceUID,
displaySetInstanceUID: invalidatedDisplaySetInstanceUID,
imageIds,
},
};
}
// Todo: grab the volume and get the id from the viewport itself
const volumeId = `${VOLUME_LOADER_SCHEME}:${invalidatedDisplaySetInstanceUID}`;
const volume = cs3DCache.getVolume(volumeId);
Iif (volume) {
Iif (volume.imageIds) {
// also for each imageId in the volume, remove the imageId from the cache
// since that will hold the old metadata as well
volume.imageIds.forEach(imageId => {
Iif (cs3DCache.getImageLoadObject(imageId)) {
cs3DCache.removeImageLoadObject(imageId, { force: true });
}
});
}
// this shouldn't be via removeVolumeLoadObject, since that will
// remove the texture as well, but here we really just need a remove
// from registry so that we load it again
cs3DCache._volumeCache.delete(volumeId);
this.volumeImageIds.delete(volumeId);
}
const displaySets = viewportData.data.map(({ displaySetInstanceUID }) =>
displaySetService.getDisplaySetByUID(displaySetInstanceUID)
);
const newViewportData = await this._getVolumeViewportData(
dataSource,
displaySets,
viewportData.viewportType
);
newViewportData.dataShapeType = dataShapeType;
return newViewportData;
}
private async _getOtherViewportData(
dataSource,
displaySets,
_initialImageIndex,
viewportType: Enums.ViewportType
): Promise<StackViewportData> {
// TODO - handle overlays and secondary display sets, but for now assume
// the 1st display set is the one of interest
const [displaySet] = displaySets;
Iif (!displaySet.imageIds) {
displaySet.imagesIds = this._getCornerstoneStackImageIds(displaySet, dataSource);
}
const { imageIds: data, viewportType: dsViewportType } = displaySet;
return {
viewportType: dsViewportType || viewportType,
data: displaySets,
};
}
private async _getStackViewportData(
dataSource,
displaySets,
initialImageIndex,
viewportType: Enums.ViewportType
): Promise<StackViewportData> {
// Overlays are loaded before the loop below so that a segmentation can
// back-fill the imageIds of the series it references.
const overlayDisplaySets = displaySets.filter(ds => ds.isOverlayDisplaySet);
for (const overlayDisplaySet of overlayDisplaySets) {
await loadDisplaySetData(overlayDisplaySet, this.servicesManager);
}
// Ensuring the first non-overlay `displaySet` is always the primary one
const StackViewportData = [];
for (const displaySet of displaySets) {
const { displaySetInstanceUID, StudyInstanceUID, isCompositeStack } = displaySet;
await loadDisplaySetData(displaySet, this.servicesManager);
let stackImageIds = this.stackImageIds.get(displaySet.displaySetInstanceUID);
if (!stackImageIds) {
stackImageIds = this._getCornerstoneStackImageIds(displaySet, dataSource);
// assign imageIds to the displaySet
displaySet.imageIds = stackImageIds;
this.stackImageIds.set(displaySet.displaySetInstanceUID, stackImageIds);
}
StackViewportData.push({
StudyInstanceUID,
displaySetInstanceUID,
isCompositeStack,
imageIds: stackImageIds,
initialImageIndex,
});
}
return {
viewportType,
data: StackViewportData,
};
}
private async _getVolumeViewportData(
dataSource,
displaySets,
viewportType: Enums.ViewportType
): Promise<VolumeViewportData> {
// Todo: Check the cache for multiple scenarios to see if we need to
// decache the volume data from other viewports or not
const volumeData = [];
for (const displaySet of displaySets) {
const { Modality } = displaySet;
const isParametricMap = Modality === 'PMAP';
const isSegOrRtstruct = Modality === 'SEG' || Modality === 'RTSTRUCT';
// Don't create volumes for the displaySets that have custom load
// function (e.g., SEG, RT, since they rely on the reference volumes
// and they take care of their own loading after they are created in their
// getSOPClassHandler method
if (displaySet.load instanceof Function) {
await loadDisplaySetData(displaySet, this.servicesManager);
// Parametric maps have a `load` method but it should not be loaded in the
// same way as SEG and RTSTRUCT but like a normal volume
if (!isParametricMap) {
volumeData.push({
studyInstanceUID: displaySet.StudyInstanceUID,
displaySetInstanceUID: displaySet.displaySetInstanceUID,
});
// Todo: do some cache check and empty the cache if needed
continue;
}
}
const volumeLoaderSchema = displaySet.volumeLoaderSchema ?? VOLUME_LOADER_SCHEME;
const volumeId = `${volumeLoaderSchema}:${displaySet.displaySetInstanceUID}`;
let volumeImageIds = this.volumeImageIds.get(displaySet.displaySetInstanceUID);
let volume = cs3DCache.getVolume(volumeId);
// Parametric maps do not have image ids but they already have volume data
// therefore a new volume should not be created.
if (!isParametricMap && !isSegOrRtstruct && (!volumeImageIds || !volume)) {
volumeImageIds = this._getCornerstoneVolumeImageIds(displaySet, dataSource);
volume = await volumeLoader.createAndCacheVolume(volumeId, {
imageIds: volumeImageIds,
});
this.volumeImageIds.set(displaySet.displaySetInstanceUID, volumeImageIds);
// Add imageIds to the displaySet for volumes
displaySet.imageIds = volumeImageIds;
}
volumeData.push({
StudyInstanceUID: displaySet.StudyInstanceUID,
displaySetInstanceUID: displaySet.displaySetInstanceUID,
volume,
volumeId,
imageIds: volumeImageIds,
isDynamicVolume: displaySet.isDynamicVolume,
});
}
return {
viewportType,
data: volumeData,
};
}
private _getCornerstoneStackImageIds(displaySet, dataSource): string[] {
return dataSource.getImageIdsForDisplaySet(displaySet);
}
private _getCornerstoneVolumeImageIds(displaySet, dataSource): string[] {
if (displaySet.imageIds) {
return displaySet.imageIds;
}
const stackImageIds = this._getCornerstoneStackImageIds(displaySet, dataSource);
return stackImageIds;
}
}
export default CornerstoneCacheService;
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