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import { Types as OhifTypes } from '@ohif/core';
import {
RenderingEngine,
StackViewport,
Types,
getRenderingEngine,
utilities as csUtils,
VolumeViewport,
VolumeViewport3D,
cache,
Enums as csEnums,
BaseVolumeViewport,
} from '@cornerstonejs/core';
import { utilities as csToolsUtils, Enums as csToolsEnums } from '@cornerstonejs/tools';
import { IViewportService } from './IViewportService';
import { RENDERING_ENGINE_ID } from './constants';
import ViewportInfo, { DisplaySetOptions, PublicViewportOptions } from './Viewport';
import { StackViewportData, VolumeViewportData } from '../../types/CornerstoneCacheService';
import {
LutPresentation,
PositionPresentation,
Presentations,
SegmentationPresentation,
SegmentationPresentationItem,
} from '../../types/Presentation';
import JumpPresets from '../../utils/JumpPresets';
import { ViewportProperties } from '@cornerstonejs/core/types';
import { useLutPresentationStore } from '../../stores/useLutPresentationStore';
import { usePositionPresentationStore } from '../../stores/usePositionPresentationStore';
import { useSynchronizersStore } from '../../stores/useSynchronizersStore';
import { useSegmentationPresentationStore } from '../../stores/useSegmentationPresentationStore';
const EVENTS = {
VIEWPORT_DATA_CHANGED: 'event::cornerstoneViewportService:viewportDataChanged',
VIEWPORT_VOLUMES_CHANGED: 'event::cornerstoneViewportService:viewportVolumesChanged',
};
export const WITH_NAVIGATION = { withNavigation: true, withOrientation: false };
/**
* Handles cornerstone viewport logic including enabling, disabling, and
* updating the viewport.
*/
class CornerstoneViewportService extends PubSubService implements IViewportService {
static REGISTRATION = {
name: 'cornerstoneViewportService',
altName: 'CornerstoneViewportService',
create: ({
servicesManager,
}: OhifTypes.Extensions.ExtensionParams): CornerstoneViewportService => {
return new CornerstoneViewportService(servicesManager);
},
};
renderingEngine: Types.IRenderingEngine | null;
viewportsById: Map<string, ViewportInfo> = new Map();
viewportGridResizeObserver: ResizeObserver | null;
viewportsDisplaySets: Map<string, string[]> = new Map();
beforeResizePositionPresentations: Map<string, PositionPresentation> = new Map();
// Some configs
enableResizeDetector: true;
resizeRefreshRateMs: 200;
resizeRefreshMode: 'debounce';
servicesManager: AppTypes.ServicesManager = null;
resizeQueue = [];
viewportResizeTimer = null;
gridResizeDelay = 50;
gridResizeTimeOut = null;
constructor(servicesManager: AppTypes.ServicesManager) {
super(EVENTS);
this.renderingEngine = null;
this.viewportGridResizeObserver = null;
this.servicesManager = servicesManager;
}
hangingProtocolService: unknown;
viewportsInfo: unknown;
sceneVolumeInputs: unknown;
viewportDivElements: unknown;
ViewportPropertiesMap: unknown;
volumeUIDs: unknown;
displaySetsNeedRerendering: unknown;
viewportDisplaySets: unknown;
/**
* Adds the HTML element to the viewportService
* @param {*} viewportId
* @param {*} elementRef
*/
public enableViewport(viewportId: string, elementRef: HTMLDivElement): void {
const viewportInfo = new ViewportInfo(viewportId);
viewportInfo.setElement(elementRef);
this.viewportsById.set(viewportId, viewportInfo);
}
public getViewportIds(): string[] {
return Array.from(this.viewportsById.keys());
}
/**
* It retrieves the renderingEngine if it does exist, or creates one otherwise
* @returns {RenderingEngine} rendering engine
*/
public getRenderingEngine() {
// get renderingEngine from cache if it exists
const renderingEngine = getRenderingEngine(RENDERING_ENGINE_ID);
if (renderingEngine) {
this.renderingEngine = renderingEngine;
return this.renderingEngine;
}
if (!renderingEngine || renderingEngine.hasBeenDestroyed) {
this.renderingEngine = new RenderingEngine(RENDERING_ENGINE_ID);
}
return this.renderingEngine;
}
/**
* It triggers the resize on the rendering engine, and renders the viewports
*
* @param isGridResize - if the resize is triggered by a grid resize
* this is used to avoid double resize of the viewports since if the
* grid is resized, all viewports will be resized so there is no need
* to resize them individually which will get triggered by their
* individual resize observers
*/
public resize(isGridResize = false) {
// https://stackoverflow.com/a/26279685
// This resize() call, among other things, rerenders the viewports. But when the entire viewer is
// display: none'd, it makes the size of all hidden elements 0, including the viewport canvas and its containers.
// Even if the viewer is later displayed again, trying to render when the size is 0 permanently "breaks" the
// viewport, making it fully black even after the size is normal again. So just ignore resize events when hidden:
const areViewportsHidden = Array.from(this.viewportsById.values()).every(viewportInfo => {
const element = viewportInfo.getElement();
return element.clientWidth === 0 && element.clientHeight === 0;
});
if (areViewportsHidden) {
console.warn('Ignoring resize when viewports have size 0');
return;
}
// if there is a grid resize happening, it means the viewport grid
// has been manipulated (e.g., panels closed, added, etc.) and we need
// to resize all viewports, so we will add a timeout here to make sure
// we don't double resize the viewports when viewports in the grid are
// resized individually
if (isGridResize) {
this.performResize();
this.resetGridResizeTimeout();
this.resizeQueue = [];
clearTimeout(this.viewportResizeTimer);
} else {
this.enqueueViewportResizeRequest();
}
}
/**
* Removes the viewport from cornerstone, and destroys the rendering engine
*/
public destroy() {
this._removeResizeObserver();
this.viewportGridResizeObserver = null;
try {
this.renderingEngine?.destroy?.();
} catch (e) {
console.warn('Rendering engine not destroyed', e);
}
this.viewportsDisplaySets.clear();
this.renderingEngine = null;
cache.purgeCache();
}
/**
* Disables the viewport inside the renderingEngine, if no viewport is left
* it destroys the renderingEngine.
*
* This is called when the element goes away entirely - with new viewportId's
* created for every new viewport, this will be called whenever the set of
* viewports is changed, but NOT when the viewport position changes only.
*
* @param viewportId - The viewportId to disable
*/
public disableElement(viewportId: string): void {
this.renderingEngine?.disableElement(viewportId);
// clean up
this.viewportsById.delete(viewportId);
this.viewportsDisplaySets.delete(viewportId);
}
/**
* Sets the presentations for a given viewport. Presentations is an object
* that can define the lut or position for a viewport.
*
* @param viewportId - The ID of the viewport.
* @param presentations - The presentations to apply to the viewport.
* @param viewportInfo - Contains a view reference for immediate application
*/
public setPresentations(viewportId: string, presentations: Presentations): void {
const viewport = this.getCornerstoneViewport(viewportId) as
| Types.IStackViewport
| Types.IVolumeViewport;
if (!viewport || !presentations) {
return;
}
const { lutPresentation, positionPresentation, segmentationPresentation } = presentations;
// Always set the segmentation presentation first, since there might be some
// lutpresentation states that need to be set on the segmentation
// Todo: i think we should even await this
this._setSegmentationPresentation(viewport, segmentationPresentation);
this._setLutPresentation(viewport, lutPresentation);
this._setPositionPresentation(viewport, { ...positionPresentation, viewportId });
}
/**
* Stores the presentation state for a given viewport inside the
* each store. This is used to persist the presentation state
* across different scenarios e.g., when the viewport is changing the
* display set, or when the viewport is moving to a different layout.
*
* @param viewportId The ID of the viewport.
*/
public storePresentation({ viewportId }) {
const presentationIds = this.getPresentationIds(viewportId);
const { syncGroupService } = this.servicesManager.services;
const synchronizers = syncGroupService.getSynchronizersForViewport(viewportId);
if (!presentationIds || Object.keys(presentationIds).length === 0) {
return null;
}
const { lutPresentationId, positionPresentationId, segmentationPresentationId } =
presentationIds;
const positionPresentation = this._getPositionPresentation(viewportId);
const lutPresentation = this._getLutPresentation(viewportId);
const segmentationPresentation = this._getSegmentationPresentation(viewportId);
const { setLutPresentation } = useLutPresentationStore.getState();
const { setPositionPresentation } = usePositionPresentationStore.getState();
const { setSynchronizers } = useSynchronizersStore.getState();
const { setSegmentationPresentation } = useSegmentationPresentationStore.getState();
if (lutPresentationId) {
setLutPresentation(lutPresentationId, lutPresentation);
}
if (positionPresentationId) {
setPositionPresentation(positionPresentationId, positionPresentation);
}
if (segmentationPresentationId) {
setSegmentationPresentation(segmentationPresentationId, segmentationPresentation);
}
if (synchronizers?.length) {
setSynchronizers(
viewportId,
synchronizers.map(synchronizer => ({
id: synchronizer.id,
sourceViewports: [...synchronizer.getSourceViewports()],
targetViewports: [...synchronizer.getTargetViewports()],
}))
);
}
}
/**
* Retrieves the presentations for a given viewport.
* @param viewportId - The ID of the viewport.
* @returns The presentations for the viewport.
*/
public getPresentations(viewportId: string): Presentations {
const positionPresentation = this._getPositionPresentation(viewportId);
const lutPresentation = this._getLutPresentation(viewportId);
const segmentationPresentation = this._getSegmentationPresentation(viewportId);
return {
positionPresentation,
lutPresentation,
segmentationPresentation,
};
}
private getPresentationIds(viewportId: string): AppTypes.PresentationIds | null {
const viewportInfo = this.viewportsById.get(viewportId);
Iif (!viewportInfo) {
return null;
}
return viewportInfo.getPresentationIds();
}
private _getPositionPresentation(viewportId: string): PositionPresentation {
const csViewport = this.getCornerstoneViewport(viewportId);
Iif (!csViewport) {
return;
}
const viewportInfo = this.viewportsById.get(viewportId);
return {
viewportType: viewportInfo.getViewportType(),
viewReference: csViewport instanceof VolumeViewport3D ? null : csViewport.getViewReference(),
viewPresentation: csViewport.getViewPresentation({ pan: true, zoom: true }),
viewportId,
};
}
private _getLutPresentation(viewportId: string): LutPresentation {
const csViewport = this.getCornerstoneViewport(viewportId) as
| Types.IStackViewport
| Types.IVolumeViewport;
Iif (!csViewport) {
return;
}
const cleanProperties = properties => {
if (properties?.isComputedVOI) {
delete properties?.voiRange;
delete properties?.VOILUTFunction;
}
return properties;
};
const properties =
csViewport instanceof BaseVolumeViewport
? new Map()
: cleanProperties(csViewport.getProperties());
if (properties instanceof Map) {
const volumeIds = (csViewport as Types.IBaseVolumeViewport).getAllVolumeIds();
volumeIds?.forEach(volumeId => {
const csProps = cleanProperties(csViewport.getProperties(volumeId));
properties.set(volumeId, csProps);
});
}
const viewportInfo = this.viewportsById.get(viewportId);
return {
viewportType: viewportInfo.getViewportType(),
properties,
};
}
private _getSegmentationPresentation(viewportId: string): SegmentationPresentation {
const { segmentationService } = this.servicesManager.services;
const presentation = segmentationService.getPresentation(viewportId);
return presentation;
}
/**
* Sets the viewport data for a viewport.
* @param viewportId - The ID of the viewport to set the data for.
* @param viewportData - The viewport data to set.
* @param publicViewportOptions - The public viewport options.
* @param publicDisplaySetOptions - The public display set options.
* @param presentations - The presentations to set.
*/
public setViewportData(
viewportId: string,
viewportData: StackViewportData | VolumeViewportData,
publicViewportOptions: PublicViewportOptions,
publicDisplaySetOptions: DisplaySetOptions[],
presentations?: Presentations
): void {
const renderingEngine = this.getRenderingEngine();
// if not valid viewportData then return early
if (viewportData.viewportType === csEnums.ViewportType.STACK) {
// check if imageIds is valid
Iif (!viewportData.data[0].imageIds?.length) {
return;
}
}
// This is the old viewportInfo, which may have old options but we might be
// using its viewport (same viewportId as the new viewportInfo)
const viewportInfo = this.viewportsById.get(viewportId);
// We should store the presentation for the current viewport since we can't only
// rely to store it WHEN the viewport is disabled since we might keep around the
// same viewport/element and just change the viewportData for it (drag and drop etc.)
// the disableElement storePresentation handle would not be called in this case
// and we would lose the presentation.
this.storePresentation({ viewportId: viewportInfo.getViewportId() });
// Todo: i don't like this here, move it
this.servicesManager.services.segmentationService.clearSegmentationRepresentations(
viewportInfo.getViewportId()
);
Iif (!viewportInfo) {
throw new Error('element is not enabled for the given viewportId');
}
// override the viewportOptions and displaySetOptions with the public ones
// since those are the newly set ones, we set them here so that it handles defaults
const displaySetOptions = viewportInfo.setPublicDisplaySetOptions(publicDisplaySetOptions);
// Specify an over-ride for the viewport type, even though it is in the public
// viewport options, because the one in the viewportData is a requirement based on the
// type of data being displayed.
const viewportOptions = viewportInfo.setPublicViewportOptions(
publicViewportOptions,
viewportData.viewportType
);
const element = viewportInfo.getElement();
const type = viewportInfo.getViewportType();
const background = viewportInfo.getBackground();
const orientation = viewportInfo.getOrientation();
const displayArea = viewportInfo.getDisplayArea();
const viewportInput: Types.PublicViewportInput = {
viewportId,
element,
type,
defaultOptions: {
background,
orientation,
displayArea,
},
};
// Rendering Engine Id set should happen before enabling the element
// since there are callbacks that depend on the renderingEngine id
// Todo: however, this is a limitation which means that we can't change
// the rendering engine id for a given viewport which might be a super edge
// case
viewportInfo.setRenderingEngineId(renderingEngine.id);
// Todo: this is not optimal at all, we are re-enabling the already enabled
// element which is not what we want. But enabledElement as part of the
// renderingEngine is designed to be used like this. This will trigger
// ENABLED_ELEMENT again and again, which will run onEnableElement callbacks
renderingEngine.enableElement(viewportInput);
viewportInfo.setViewportOptions(viewportOptions);
viewportInfo.setDisplaySetOptions(displaySetOptions);
viewportInfo.setViewportData(viewportData);
viewportInfo.setViewportId(viewportId);
this.viewportsById.set(viewportId, viewportInfo);
const viewport = renderingEngine.getViewport(viewportId);
const displaySetPromise = this._setDisplaySets(
viewport,
viewportData,
viewportInfo,
presentations
);
// The broadcast event here ensures that listeners have a valid, up to date
// viewport to access. Doing it too early can result in exceptions or
// invalid data.
displaySetPromise.then(() => {
this._broadcastEvent(this.EVENTS.VIEWPORT_DATA_CHANGED, {
viewportData,
viewportId,
});
});
}
/**
* Retrieves the Cornerstone viewport with the specified ID.
*
* @param viewportId - The ID of the viewport.
* @returns The Cornerstone viewport object if found, otherwise null.
*/
public getCornerstoneViewport(viewportId: string): Types.IViewport | null {
const viewportInfo = this.getViewportInfo(viewportId);
if (!viewportInfo || !this.renderingEngine || this.renderingEngine.hasBeenDestroyed) {
return null;
}
const viewport = this.renderingEngine.getViewport(viewportId);
return viewport;
}
/**
* Retrieves the viewport information for a given viewport ID. The viewport information
* is the OHIF construct that holds different options and data for a given viewport and
* is different from the cornerstone viewport.
*
* @param viewportId The ID of the viewport.
* @returns The viewport information.
*/
public getViewportInfo(viewportId: string): ViewportInfo {
return this.viewportsById.get(viewportId);
}
/**
* Looks through the viewports to see if the specified measurement can be
* displayed in one of the viewports. This function tries to get a "best fit"
* viewport to display the image in where it matches, in order:
* * Active viewport that can be navigated to the given image without orientation change
* * Other viewport that can be navigated to the given image without orientation change
* * Active viewport that can change orientation to display the image
* * Other viewport that can change orientation to display the image
*
* It returns `null` otherwise, indicating that a viewport needs display set/type
* changes in order to display the image.
*
* Notes:
* * If the display set is displayed in multiple viewports all needing orientation change,
* then the active one or first one listed will be modified. This can create unexpected
* behaviour for MPR views.
* * If the image is contained in multiple display sets, then the first one
* found will be navigated (active first, followed by first found)
*
* @param measurement - The measurement that is desired to view.
* @param activeViewportId - the index that was active at the time the jump
* was initiated.
* @return the viewportId that the measurement should be displayed in.
*/
public getViewportIdToJump(activeViewportId: string, metadata): string {
// First check if the active viewport can just be navigated to show the given item
const activeViewport = this.getCornerstoneViewport(activeViewportId);
Iif (activeViewport.isReferenceViewable(metadata, { withNavigation: true })) {
return activeViewportId;
}
// Next, see if any viewport could be navigated to show the given item,
// without considering orientation changes.
for (const id of this.viewportsById.keys()) {
const viewport = this.getCornerstoneViewport(id);
Iif (viewport?.isReferenceViewable(metadata, { withNavigation: true })) {
return id;
}
}
// No viewport is in the right display set/orientation to show this, so see if
// the active viewport could change orientations to show this
Iif (
activeViewport.isReferenceViewable(metadata, { withNavigation: true, withOrientation: true })
) {
return activeViewportId;
}
// See if any viewport could show this with an orientation change
for (const id of this.viewportsById.keys()) {
const viewport = this.getCornerstoneViewport(id);
Iif (
viewport?.isReferenceViewable(metadata, { withNavigation: true, withOrientation: true })
) {
return id;
}
}
// No luck, need to update the viewport itself
return null;
}
/**
* Sets the image data for the given viewport.
*/
private async _setOtherViewport(
viewport: Types.IStackViewport,
viewportData: StackViewportData,
viewportInfo: ViewportInfo,
_presentations: Presentations = {}
): Promise<void> {
const [displaySet] = viewportData.data;
return viewport.setDataIds(displaySet.imageIds, {
groupId: displaySet.displaySetInstanceUID,
viewReference: viewportInfo.getViewReference(),
});
}
private async _setStackViewport(
viewport: Types.IStackViewport,
viewportData: StackViewportData,
viewportInfo: ViewportInfo,
presentations: Presentations = {}
): Promise<void> {
const displaySetOptions = viewportInfo.getDisplaySetOptions();
const displaySetInstanceUIDs = viewportData.data.map(data => data.displaySetInstanceUID);
// based on the cache service construct always the first one is the non-overlay
// and the rest are overlays
this.viewportsDisplaySets.set(viewport.id, [...displaySetInstanceUIDs]);
const { initialImageIndex, imageIds } = viewportData.data[0];
// Use the slice index from any provided view reference, as the view reference
// is being used to navigate to the initial view position for measurement
// navigation and other navigation forcing specific views.
let initialImageIndexToUse =
presentations?.positionPresentation?.initialImageIndex ?? initialImageIndex;
const { rotation, flipHorizontal, displayArea } = viewportInfo.getViewportOptions();
const properties = { ...presentations.lutPresentation?.properties };
if (!presentations.lutPresentation?.properties) {
const { voi, voiInverted, colormap } = displaySetOptions[0];
Iif (voi && (voi.windowWidth || voi.windowCenter)) {
const { lower, upper } = csUtils.windowLevel.toLowHighRange(
voi.windowWidth,
voi.windowCenter
);
properties.voiRange = { lower, upper };
}
properties.invert = voiInverted ?? properties.invert;
properties.colormap = colormap ?? properties.colormap;
}
viewport.element.addEventListener(csEnums.Events.VIEWPORT_NEW_IMAGE_SET, evt => {
const { element } = evt.detail;
Iif (element !== viewport.element) {
return;
}
csToolsUtils.stackContextPrefetch.enable(element);
});
let imageIdsToSet = imageIds;
const overlayProcessingResult = this._processExtraDisplaySetsForViewport(viewport);
imageIdsToSet = overlayProcessingResult?.imageIds ?? imageIdsToSet;
const referencedImageId = presentations?.positionPresentation?.viewReference?.referencedImageId;
if (referencedImageId) {
initialImageIndexToUse = imageIdsToSet.indexOf(referencedImageId);
}
if (initialImageIndexToUse === undefined || initialImageIndexToUse === null) {
initialImageIndexToUse = this._getInitialImageIndexForViewport(viewportInfo, imageIds) || 0;
}
return viewport.setStack(imageIdsToSet, initialImageIndexToUse).then(() => {
viewport.setProperties({ ...properties });
this.setPresentations(viewport.id, presentations, viewportInfo);
if (overlayProcessingResult?.addOverlayFn) {
overlayProcessingResult.addOverlayFn();
}
Iif (displayArea) {
viewport.setDisplayArea(displayArea);
}
Iif (rotation) {
viewport.setProperties({ rotation });
}
Iif (flipHorizontal) {
viewport.setCamera({ flipHorizontal: true });
}
});
}
private _getInitialImageIndexForViewport(
viewportInfo: ViewportInfo,
imageIds?: string[]
): number {
const initialImageOptions = viewportInfo.getInitialImageOptions();
if (!initialImageOptions) {
return;
}
const { index, preset } = initialImageOptions;
const viewportType = viewportInfo.getViewportType();
let numberOfSlices;
Iif (viewportType === csEnums.ViewportType.STACK) {
numberOfSlices = imageIds.length;
} else if (viewportType === csEnums.ViewportType.ORTHOGRAPHIC) {
const viewport = this.getCornerstoneViewport(viewportInfo.getViewportId());
const imageSliceData = csUtils.getImageSliceDataForVolumeViewport(viewport);
Iif (!imageSliceData) {
return;
}
({ numberOfSlices } = imageSliceData);
} else E{
return;
}
return this._getInitialImageIndex(numberOfSlices, index, preset);
}
_getInitialImageIndex(numberOfSlices: number, imageIndex?: number, preset?: JumpPresets): number {
const lastSliceIndex = numberOfSlices - 1;
Iif (imageIndex !== undefined) {
return csUtils.clip(imageIndex, 0, lastSliceIndex);
}
Iif (preset === JumpPresets.First) {
return 0;
}
Iif (preset === JumpPresets.Last) {
return lastSliceIndex;
}
if (preset === JumpPresets.Middle) {
// Note: this is a simple but yet very important formula.
// since viewport reset works with the middle slice
// if the below formula is not correct, on a viewport reset
// it will jump to a different slice than the middle one which
// was the initial slice, and we have some tools such as Crosshairs
// which rely on a relative camera modifications and those will break.
return lastSliceIndex % 2 === 0 ? lastSliceIndex / 2 : (lastSliceIndex + 1) / 2;
}
return 0;
}
async _setVolumeViewport(
viewport: Types.IVolumeViewport,
viewportData: VolumeViewportData,
viewportInfo: ViewportInfo,
presentations: Presentations = {}
): Promise<void> {
// TODO: We need to overhaul the way data sources work so requests can be made
// async. I think we should follow the image loader pattern which is async and
// has a cache behind it.
// The problem is that to set this volume, we need the metadata, but the request is
// already in-flight, and the promise is not cached, so we have no way to wait for
// it and know when it has fully arrived.
// loadStudyMetadata(StudyInstanceUID) => Promise([instances for study])
// loadSeriesMetadata(StudyInstanceUID, SeriesInstanceUID) => Promise([instances for series])
// If you call loadStudyMetadata and it's not in the DicomMetadataStore cache, it should fire
// a request through the data source?
// (This call may or may not create sub-requests for series metadata)
const { displaySetService } = this.servicesManager.services;
const volumeInputArray = [];
const displaySetOptionsArray = viewportInfo.getDisplaySetOptions();
const { hangingProtocolService } = this.servicesManager.services;
const volumeToLoad = [];
const displaySetInstanceUIDs = [];
for (const [index, data] of viewportData.data.entries()) {
const { imageIds, displaySetInstanceUID } = data;
let volume = data.volume;
if (!volume) {
const displaySet = displaySetService.getDisplaySetByUID(displaySetInstanceUID);
volume = csToolsUtils.getOrCreateImageVolume(displaySet.images.map(image => image.imageId));
}
displaySetInstanceUIDs.push(displaySetInstanceUID);
Iif (!volume) {
console.log('Volume display set not found');
continue;
}
volumeToLoad.push(volume);
const displaySetOptions = displaySetOptionsArray[index];
const { volumeId } = volume;
volumeInputArray.push({
imageIds,
volumeId,
blendMode: displaySetOptions.blendMode,
slabThickness: this._getSlabThickness(displaySetOptions, volumeId),
});
}
this.viewportsDisplaySets.set(viewport.id, displaySetInstanceUIDs);
const volumesNotLoaded = volumeToLoad.filter(volume => !volume.loadStatus?.loaded);
if (volumesNotLoaded.length) {
if (hangingProtocolService.getShouldPerformCustomImageLoad()) {
// delegate the volume loading to the hanging protocol service if it has a custom image load strategy
return hangingProtocolService.runImageLoadStrategy({
viewportId: viewport.id,
volumeInputArray,
});
}
volumesNotLoaded.forEach(volume => {
if (!volume.loadStatus?.loading && volume.load instanceof Function) {
volume.load();
}
});
}
// It's crucial not to return here because the volume may be loaded,
// but the viewport also needs to set the volume.
// if (!volumesNotLoaded.length) {
// return;
// }
// This returns the async continuation only
return this.setVolumesForViewport(viewport, volumeInputArray, presentations);
}
public async setVolumesForViewport(viewport, volumeInputArray, presentations) {
const { displaySetService, viewportGridService } = this.servicesManager.services;
const viewportInfo = this.getViewportInfo(viewport.id);
const displaySetOptions = viewportInfo.getDisplaySetOptions();
const displaySetUIDs = viewportGridService.getDisplaySetsUIDsForViewport(viewport.id);
const displaySet = displaySetService.getDisplaySetByUID(displaySetUIDs[0]);
const displaySetModality = displaySet?.Modality;
// Todo: use presentations states
const volumesProperties = volumeInputArray.map((volumeInput, index) => {
const { volumeId } = volumeInput;
const displaySetOption = displaySetOptions[index];
const { voi, voiInverted, colormap, displayPreset } = displaySetOption;
const properties = {} as ViewportProperties;
Iif (voi && (voi.windowWidth || voi.windowCenter)) {
const { lower, upper } = csUtils.windowLevel.toLowHighRange(
voi.windowWidth,
voi.windowCenter
);
properties.voiRange = { lower, upper };
}
Iif (voiInverted !== undefined) {
properties.invert = voiInverted;
}
Iif (colormap !== undefined) {
properties.colormap = colormap;
}
if (displayPreset !== undefined) {
properties.preset = displayPreset[displaySetModality] || displayPreset.default;
}
return { properties, volumeId };
});
// For SEG and RT viewports
const { addOverlayFn } = this._processExtraDisplaySetsForViewport(viewport) || {};
await viewport.setVolumes(volumeInputArray);
if (addOverlayFn) {
addOverlayFn();
}
viewport.render();
volumesProperties.forEach(({ properties, volumeId }) => {
setTimeout(() => {
// seems like a hack but we need the actor to be ready first before
// we set the properties
viewport.setProperties(properties, volumeId);
viewport.render();
}, 0);
});
this.setPresentations(viewport.id, presentations, viewportInfo);
if (!presentations.positionPresentation) {
const imageIndex = this._getInitialImageIndexForViewport(viewportInfo);
if (imageIndex !== undefined) {
csUtils.jumpToSlice(viewport.element, {
imageIndex,
});
}
}
this._broadcastEvent(this.EVENTS.VIEWPORT_VOLUMES_CHANGED, {
viewportInfo,
});
}
private _processExtraDisplaySetsForViewport(
viewport: Types.IStackViewport | Types.IVolumeViewport
) {
const { displaySetService } = this.servicesManager.services;
// load any secondary displaySets
const displaySetInstanceUIDs = this.viewportsDisplaySets.get(viewport.id);
// Can be SEG or RTSTRUCT for now but not PMAP
const segOrRTSOverlayDisplaySet = displaySetInstanceUIDs
.map(displaySetService.getDisplaySetByUID)
.find(
displaySet =>
displaySet?.isOverlayDisplaySet && ['SEG', 'RTSTRUCT'].includes(displaySet.Modality)
);
// if it is only the overlay displaySet, then we need to get the reference
// displaySet imageIds and set them as the imageIds for the viewport,
// here we can do some logic if the reference is missing
// then find the most similar match of displaySet instead
if (!segOrRTSOverlayDisplaySet) {
return;
}
const referenceDisplaySet = displaySetService.getDisplaySetByUID(
segOrRTSOverlayDisplaySet.referencedDisplaySetInstanceUID
);
const imageIds = referenceDisplaySet.images.map(image => image.imageId);
return {
imageIds,
addOverlayFn: () =>
this.addOverlayRepresentationForDisplaySet(segOrRTSOverlayDisplaySet, viewport),
};
}
private addOverlayRepresentationForDisplaySet(
displaySet: OhifTypes.DisplaySet,
viewport: Types.IViewport
) {
const { segmentationService } = this.servicesManager.services;
const segmentationId = displaySet.displaySetInstanceUID;
const representationType =
displaySet.Modality === 'SEG'
? csToolsEnums.SegmentationRepresentations.Labelmap
: csToolsEnums.SegmentationRepresentations.Contour;
segmentationService.addSegmentationRepresentation(viewport.id, {
segmentationId,
type: representationType,
});
// store the segmentation presentation id in the viewport info
this.storePresentation({ viewportId: viewport.id });
}
// Todo: keepCamera is an interim solution until we have a better solution for
// keeping the camera position when the viewport data is changed
public updateViewport(viewportId: string, viewportData, keepCamera = false) {
const viewportInfo = this.getViewportInfo(viewportId);
const viewport = this.getCornerstoneViewport(viewportId);
const viewportCamera = viewport.getCamera();
let displaySetPromise;
Iif (viewport instanceof VolumeViewport || viewport instanceof VolumeViewport3D) {
displaySetPromise = this._setVolumeViewport(viewport, viewportData, viewportInfo).then(() => {
Iif (keepCamera) {
viewport.setCamera(viewportCamera);
viewport.render();
}
});
}
Iif (viewport instanceof StackViewport) {
displaySetPromise = this._setStackViewport(viewport, viewportData, viewportInfo);
}
displaySetPromise.then(() => {
this._broadcastEvent(this.EVENTS.VIEWPORT_DATA_CHANGED, {
viewportData,
viewportId,
});
});
}
_setDisplaySets(
viewport: Types.IViewport,
viewportData: StackViewportData | VolumeViewportData,
viewportInfo: ViewportInfo,
presentations: Presentations = {}
): Promise<void> {
if (viewport instanceof StackViewport) {
return this._setStackViewport(
viewport,
viewportData as StackViewportData,
viewportInfo,
presentations
);
}
if ([VolumeViewport, VolumeViewport3D].some(type => viewport instanceof type)) {
return this._setVolumeViewport(
viewport as Types.IVolumeViewport,
viewportData as VolumeViewportData,
viewportInfo,
presentations
);
}
return this._setOtherViewport(
viewport,
viewportData as StackViewportData,
viewportInfo,
presentations
);
}
/**
* Removes the resize observer from the viewport element
*/
_removeResizeObserver() {
Iif (this.viewportGridResizeObserver) {
this.viewportGridResizeObserver.disconnect();
}
}
_getSlabThickness(displaySetOptions, volumeId) {
const { blendMode } = displaySetOptions;
if (blendMode === undefined || displaySetOptions.slabThickness === undefined) {
return;
}
// if there is a slabThickness set as a number then use it
Iif (typeof displaySetOptions.slabThickness === 'number') {
return displaySetOptions.slabThickness;
}
Iif (displaySetOptions.slabThickness.toLowerCase() === 'fullvolume') {
// calculate the slab thickness based on the volume dimensions
const imageVolume = cache.getVolume(volumeId);
const { dimensions, spacing } = imageVolume;
const slabThickness = Math.sqrt(
Math.pow(dimensions[0] * spacing[0], 2) +
Math.pow(dimensions[1] * spacing[1], 2) +
Math.pow(dimensions[2] * spacing[2], 2)
);
return slabThickness;
}
}
_getFrameOfReferenceUID(displaySetInstanceUID) {
const { displaySetService } = this.servicesManager.services;
const displaySet = displaySetService.getDisplaySetByUID(displaySetInstanceUID);
Iif (!displaySet) {
return;
}
Iif (displaySet.frameOfReferenceUID) {
return displaySet.frameOfReferenceUID;
}
Iif (displaySet.Modality === 'SEG') {
const { instance } = displaySet;
return instance.FrameOfReferenceUID;
}
Iif (displaySet.Modality === 'RTSTRUCT') {
const { instance } = displaySet;
return instance.ReferencedFrameOfReferenceSequence.FrameOfReferenceUID;
}
const { images } = displaySet;
Iif (images && images.length) {
return images[0].FrameOfReferenceUID;
}
}
private enqueueViewportResizeRequest() {
this.resizeQueue.push(false); // false indicates viewport resize
clearTimeout(this.viewportResizeTimer);
this.viewportResizeTimer = setTimeout(() => {
this.processViewportResizeQueue();
}, this.gridResizeDelay);
}
private processViewportResizeQueue() {
const isGridResizeInQueue = this.resizeQueue.some(isGridResize => isGridResize);
if (this.resizeQueue.length > 0 && !isGridResizeInQueue && !this.gridResizeTimeOut) {
this.performResize();
}
// Clear the queue after processing viewport resizes
this.resizeQueue = [];
}
private performResize() {
const isImmediate = false;
try {
const viewports = this.getRenderingEngine().getViewports();
// Store the current position presentations for each viewport.
viewports.forEach(({ id: viewportId }) => {
const presentation = this._getPositionPresentation(viewportId);
// During a resize, the slice index should remain unchanged. This is a temporary fix for
// a larger issue regarding the definition of slice index with slab thickness.
// We need to revisit this to make it more robust and understandable.
delete presentation.viewReference?.sliceIndex;
this.beforeResizePositionPresentations.set(viewportId, presentation);
});
// Resize the rendering engine and render.
const renderingEngine = this.renderingEngine;
renderingEngine.resize(isImmediate);
renderingEngine.render();
// Reset the camera for all viewports using position presentation to maintain relative size/position
// which means only those viewports that have a zoom level of 1.
this.beforeResizePositionPresentations.forEach((positionPresentation, viewportId) => {
this.setPresentations(viewportId, {
positionPresentation,
});
});
// Resize and render the rendering engine again.
renderingEngine.resize(isImmediate);
renderingEngine.render();
} catch (e) {
// This can happen if the resize is too close to navigation or shutdown
console.warn('Caught resize exception', e);
}
}
private resetGridResizeTimeout() {
clearTimeout(this.gridResizeTimeOut);
this.gridResizeTimeOut = setTimeout(() => {
this.gridResizeTimeOut = null;
}, this.gridResizeDelay);
}
private _setLutPresentation(
viewport: Types.IStackViewport | Types.IVolumeViewport,
lutPresentation: LutPresentation
): void {
if (!lutPresentation) {
return;
}
const { properties } = lutPresentation;
if (viewport instanceof BaseVolumeViewport) {
if (properties instanceof Map) {
properties.forEach((propertiesEntry, volumeId) => {
viewport.setProperties(propertiesEntry, volumeId);
});
} else {
viewport.setProperties(properties);
}
} else {
viewport.setProperties(properties);
}
}
private _setPositionPresentation(
viewport: Types.IStackViewport | Types.IVolumeViewport,
positionPresentation: PositionPresentation
): void {
const viewRef = positionPresentation?.viewReference;
if (viewRef) {
if (viewport.isReferenceViewable(viewRef, WITH_NAVIGATION)) {
viewport.setViewReference(viewRef);
} else {
console.warn('Unable to apply reference viewable', viewRef);
}
}
const viewPresentation = positionPresentation?.viewPresentation;
if (viewPresentation) {
viewport.setViewPresentation(viewPresentation);
}
}
private _setSegmentationPresentation(
viewport: Types.IStackViewport | Types.IVolumeViewport,
segmentationPresentation: SegmentationPresentation
): void {
if (!segmentationPresentation) {
return;
}
const { segmentationService } = this.servicesManager.services;
segmentationPresentation.forEach((presentationItem: SegmentationPresentationItem) => {
const { segmentationId, type, hydrated } = presentationItem;
if (hydrated) {
segmentationService.addSegmentationRepresentation(viewport.id, {
segmentationId,
type,
});
}
});
}
/**
* Gets the display sets for a given viewport
* @param viewportId - The ID of the viewport to get display sets for
* @returns Array of display sets for the viewport
*/
public getViewportDisplaySets(viewportId: string): OhifTypes.DisplaySet[] {
const { displaySetService } = this.servicesManager.services;
const displaySetInstanceUIDs = this.viewportsDisplaySets.get(viewportId) || [];
return displaySetInstanceUIDs
.map(uid => displaySetService.getDisplaySetByUID(uid))
.filter(Boolean);
}
}
export default CornerstoneViewportService;
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