feat(resize): Optimize resizing process and maintain zoom level (#3889)

extensions/cornerstone/package.json

@@ -25,6 +25,8 @@
     "access": "public"
   },
   "scripts": {
+    "clean": "shx rm -rf dist",
+    "clean:deep": "yarn run clean && shx rm -rf node_modules",
     "dev": "cross-env NODE_ENV=development webpack --config .webpack/webpack.dev.js --watch --output-pathinfo",
     "dev:cornerstone": "yarn run dev",
     "build": "cross-env NODE_ENV=production webpack --progress --config .webpack/webpack.prod.js",

extensions/cornerstone/src/Viewport/OHIFCornerstoneViewport.tsx

@@ -21,6 +21,7 @@ import getSOPInstanceAttributes from '../utils/measurementServiceMappings/utils/
 import CornerstoneServices from '../types/CornerstoneServices';
 import CinePlayer from '../components/CinePlayer';
 import { Types } from '@ohif/core';
+import { LutPresentation, PositionPresentation } from '../types/Presentation';
 
 const STACK = 'stack';
 
@@ -101,7 +102,6 @@ const OHIFCornerstoneViewport = React.memo(props => {
     viewportOptions,
     displaySetOptions,
     servicesManager,
-    commandsManager,
     onElementEnabled,
     onElementDisabled,
     isJumpToMeasurementDisabled,
@@ -277,7 +277,10 @@ const OHIFCornerstoneViewport = React.memo(props => {
       // The presentation state will have been stored previously by closing
       // a viewport.  Otherwise, this viewport will be unchanged and the
       // presentation information will be directly carried over.
-      const { lutPresentationStore, positionPresentationStore } = stateSyncService.getState();
+      const state = stateSyncService.getState();
+      const lutPresentationStore = state.lutPresentationStore as LutPresentation;
+      const positionPresentationStore = state.positionPresentationStore as PositionPresentation;
+
       const { presentationIds } = viewportOptions;
       const presentations = {
         positionPresentation: positionPresentationStore[presentationIds?.positionPresentationId],
@@ -360,8 +363,6 @@ const OHIFCornerstoneViewport = React.memo(props => {
     <React.Fragment>
       <div className="viewport-wrapper">
         <ReactResizeDetector
-          refreshMode="debounce"
-          refreshRate={50} // Wait 50 ms after last move to render
           onResize={onResize}
           targetRef={elementRef.current}
         />

extensions/cornerstone/src/init.tsx

@@ -204,6 +204,16 @@ export default async function init({
     }
   );
 
+  // resize the cornerstone viewport service when the grid size changes
+  // IMPORTANT: this should happen outside of the OHIFCornerstoneViewport
+  // since it will trigger a rerender of each viewport and each resizing
+  // the offscreen canvas which would result in a performance hit, this should
+  // done only once per grid resize here. Doing it once here, allows us to reduce
+  // the refreshRage(in ms) to 10 from 50. I tried with even 1 or 5 ms it worked fine
+  viewportGridService.subscribe(viewportGridService.EVENTS.GRID_SIZE_CHANGED, () => {
+    cornerstoneViewportService.resize(true);
+  });
+
   initContextMenu({
     cornerstoneViewportService,
     customizationService,

extensions/cornerstone/src/services/SegmentationService/SegmentationServiceTypes.ts

@@ -67,4 +67,4 @@ type SegmentationRepresentationData = {
   LABELMAP?: LabelmapSegmentationData;
 };
 
-export { SegmentationConfig, Segment, Segmentation };
+export type { SegmentationConfig, Segment, Segmentation };

extensions/cornerstone/src/services/ViewportService/CornerstoneViewportService.ts

@@ -10,6 +10,7 @@ import {
   VolumeViewport3D,
   cache,
   Enums as csEnums,
+  BaseVolumeViewport,
 } from '@cornerstonejs/core';
 
 import { utilities as csToolsUtils, Enums as csToolsEnums } from '@cornerstonejs/tools';
@@ -17,7 +18,7 @@ import { IViewportService } from './IViewportService';
 import { RENDERING_ENGINE_ID } from './constants';
 import ViewportInfo, { DisplaySetOptions, PublicViewportOptions } from './Viewport';
 import { StackViewportData, VolumeViewportData } from '../../types/CornerstoneCacheService';
-import { Presentation, Presentations } from '../../types/Presentation';
+import { LutPresentation, PositionPresentation, Presentations } from '../../types/Presentation';
 
 import JumpPresets from '../../utils/JumpPresets';
 
@@ -44,6 +45,7 @@ class CornerstoneViewportService extends PubSubService implements IViewportServi
   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;
@@ -51,6 +53,11 @@ class CornerstoneViewportService extends PubSubService implements IViewportServi
   resizeRefreshMode: 'debounce';
   servicesManager = null;
 
+  resizeQueue = [];
+  viewportResizeTimer = null;
+  gridResizeDelay = 50;
+  gridResizeTimeOut = null;
+
   constructor(servicesManager: ServicesManager) {
     super(EVENTS);
     this.renderingEngine = null;
@@ -94,14 +101,28 @@ class CornerstoneViewportService extends PubSubService implements IViewportServi
   }
 
   /**
-   * It triggers the resize on the rendering engine.
+   * 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() {
-    const immediate = true;
-    const keepCamera = true;
-
-    this.renderingEngine.resize(immediate, keepCamera);
-    this.renderingEngine.render();
+  public resize(isGridResize = false) {
+    // 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();
+    }
   }
 
   /**
@@ -138,97 +159,239 @@ class CornerstoneViewportService extends PubSubService implements IViewportServi
     this.viewportsDisplaySets.delete(viewportId);
   }
 
-  public setPresentations(viewport, presentations?: Presentations): void {
-    const properties = presentations?.lutPresentation?.properties;
-    if (properties) {
-      viewport.setProperties(properties);
+  /**
+   * 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.
+   */
+  public setPresentations(viewportId: string, presentations?: Presentations): void {
+    const viewport = this.getCornerstoneViewport(viewportId) as
+      | Types.IStackViewport
+      | Types.IVolumeViewport;
+
+    if (!viewport) {
+      return;
     }
-    const camera = presentations?.positionPresentation?.camera;
-    if (camera) {
-      viewport.setCamera(camera);
+
+    if (!presentations) {
+      return;
+    }
+
+    const { lutPresentation, positionPresentation } = presentations;
+    if (lutPresentation) {
+      const { presentation } = lutPresentation;
+
+      if (viewport instanceof BaseVolumeViewport) {
+        Object.entries(presentation).forEach(
+          ([volumeId, properties]: [string, Types.ViewportProperties]) => {
+            viewport.setProperties(properties, volumeId);
+          }
+        );
+      } else {
+        viewport.setProperties(presentation);
+      }
+    }
+
+    if (positionPresentation) {
+      const { viewPlaneNormal, viewUp, zoom, pan } = positionPresentation.presentation;
+      viewport.setCamera({ viewPlaneNormal, viewUp });
+
+      if (zoom !== undefined) {
+        viewport.setZoom(zoom);
+      }
+
+      if (pan !== undefined) {
+        viewport.setPan(pan);
+      }
     }
   }
 
-  public getPresentation(viewportId: string): Presentation {
+  /**
+   * Retrieves the position presentation information for a given viewport.
+   * @param viewportId The ID of the viewport.
+   * @returns The position presentation object containing various properties
+   * such as ID, viewport type, initial image index, view plane normal, view up, zoom, and pan.
+   */
+  public getPositionPresentation(viewportId: string): PositionPresentation {
     const viewportInfo = this.viewportsById.get(viewportId);
     if (!viewportInfo) {
       return;
     }
-    const { viewportType, presentationIds } = viewportInfo.getViewportOptions();
+
+    const presentationIds = viewportInfo.getPresentationIds();
+
+    if (!presentationIds) {
+      return;
+    }
+
+    const { positionPresentationId } = presentationIds;
 
     const csViewport = this.getCornerstoneViewport(viewportId);
     if (!csViewport) {
       return;
     }
 
-    const properties = csViewport.getProperties();
-    if (properties.isComputedVOI) {
-      delete properties.voiRange;
-      delete properties.VOILUTFunction;
-    }
+    const { viewPlaneNormal, viewUp } = csViewport.getCamera();
     const initialImageIndex = csViewport.getCurrentImageIdIndex();
-    const camera = csViewport.getCamera();
+    const zoom = csViewport.getZoom();
+    const pan = csViewport.getPan();
+
     return {
-      presentationIds,
-      viewportType: !viewportType || viewportType === 'stack' ? 'stack' : 'volume',
-      properties,
-      initialImageIndex,
-      camera,
+      id: positionPresentationId,
+      viewportType: viewportInfo.getViewportType(),
+      presentation: {
+        initialImageIndex,
+        viewUp,
+        viewPlaneNormal,
+        zoom,
+        pan,
+      },
     };
   }
 
-  public storePresentation({ viewportId }) {
-    const { stateSyncService, syncGroupService } = this.servicesManager.services;
-    let presentation;
-    try {
-      presentation = this.getPresentation(viewportId);
-    } catch (error) {
-      console.warn(error);
-    }
-
-    if (!presentation || !presentation.presentationIds) {
+  /**
+   * Retrieves the LUT (Lookup Table) presentation for a given viewport.
+   * @param viewportId The ID of the viewport.
+   * @returns The LUT presentation object, or undefined if the viewport does not exist.
+   */
+  public getLutPresentation(viewportId: string): LutPresentation {
+    const viewportInfo = this.viewportsById.get(viewportId);
+    if (!viewportInfo) {
       return;
     }
 
+    const presentationIds = viewportInfo.getPresentationIds();
+
+    if (!presentationIds) {
+      return;
+    }
+
+    const { lutPresentationId } = presentationIds;
+
+    const csViewport = this.getCornerstoneViewport(viewportId) as
+      | Types.IStackViewport
+      | Types.IVolumeViewport;
+
+    if (!csViewport) {
+      return;
+    }
+
+    const cleanProperties = properties => {
+      if (properties.isComputedVOI) {
+        delete properties.voiRange;
+        delete properties.VOILUTFunction;
+      }
+      return properties;
+    };
+
+    const presentation =
+      csViewport instanceof BaseVolumeViewport
+        ? new Map()
+        : cleanProperties(csViewport.getProperties());
+
+    if (presentation instanceof Map) {
+      csViewport.getActors().forEach(({ uid: volumeId }) => {
+        const properties = cleanProperties(csViewport.getProperties(volumeId));
+        presentation.set(volumeId, properties);
+      });
+    }
+
+    return {
+      id: lutPresentationId,
+      viewportType: viewportInfo.getViewportType(),
+      presentation,
+    };
+  }
+
+  /**
+   * 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 viewportInfo = this.viewportsById.get(viewportId);
+    if (!viewportInfo) {
+      return;
+    }
+
+    const positionPresentation = this.getPositionPresentation(viewportId);
+    const lutPresentation = this.getLutPresentation(viewportId);
+
+    return {
+      positionPresentation,
+      lutPresentation,
+    };
+  }
+
+  /**
+   * Stores the presentation state for a given viewport inside the
+   * stateSyncService. 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 }) {
+    let presentations = null as Presentations;
+    try {
+      presentations = this.getPresentations(viewportId);
+      if (!presentations?.positionPresentation && !presentations?.lutPresentation) {
+        return;
+      }
+    } catch (error) {
+      console.warn(error);
+      return;
+    }
+
+    const { stateSyncService, syncGroupService } = this.servicesManager.services;
+
     const synchronizers = syncGroupService.getSynchronizersForViewport(
       viewportId,
       this.renderingEngine.id
     );
 
-    const { lutPresentationStore, positionPresentationStore, synchronizersStore } =
+    const { positionPresentationStore, synchronizersStore, lutPresentationStore } =
       stateSyncService.getState();
-    const { presentationIds } = presentation;
-    const { lutPresentationId, positionPresentationId } = presentationIds || {};
-    const storeState = {};
+
+    const { lutPresentation, positionPresentation } = presentations;
+    const { id: positionPresentationId } = positionPresentation;
+    const { id: lutPresentationId } = lutPresentation;
+
+    const updateStore = (store, id, value) => ({ ...store, [id]: value });
+
+    const newState = {} as { [key: string]: any };
+
     if (lutPresentationId) {
-      storeState.lutPresentationStore = {
-        ...lutPresentationStore,
-        [lutPresentationId]: presentation,
-      };
+      newState.lutPresentationStore = updateStore(
+        lutPresentationStore,
+        lutPresentationId,
+        lutPresentation
+      );
     }
+
     if (positionPresentationId) {
-      storeState.positionPresentationStore = {
-        ...positionPresentationStore,
-        [positionPresentationId]: presentation,
-      };
+      newState.positionPresentationStore = updateStore(
+        positionPresentationStore,
+        positionPresentationId,
+        positionPresentation
+      );
     }
 
     if (synchronizers?.length) {
-      storeState.synchronizersStore = {
-        ...synchronizersStore,
-        [viewportId]: synchronizers.map(synchronizer => {
-          const sourceViewports = synchronizer.getSourceViewports();
-          const targetViewports = synchronizer.getTargetViewports();
-          return {
-            id: synchronizer.id,
-            sourceViewports: [...sourceViewports],
-            targetViewports: [...targetViewports],
-          };
-        }),
-      };
+      newState.synchronizersStore = updateStore(
+        synchronizersStore,
+        viewportId,
+        synchronizers.map(synchronizer => ({
+          id: synchronizer.id,
+          sourceViewports: [...synchronizer.getSourceViewports()],
+          targetViewports: [...synchronizer.getTargetViewports()],
+        }))
+      );
     }
 
-    stateSyncService.store(storeState);
+    stateSyncService.store(newState);
   }
 
   /**
@@ -324,9 +487,13 @@ class CornerstoneViewportService extends PubSubService implements IViewportServi
     });
   }
 
-  public getCornerstoneViewport(
-    viewportId: string
-  ): Types.IStackViewport | Types.IVolumeViewport | null {
+  /**
+   * 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) {
@@ -338,15 +505,51 @@ class CornerstoneViewportService extends PubSubService implements IViewportServi
     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.
+   *
+   * @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,
+    displaySetInstanceUID: string,
+    cameraProps: unknown
+  ): string {
+    const viewportInfo = this.getViewportInfo(activeViewportId);
+    const { referencedImageId } = cameraProps;
+    if (viewportInfo?.contains(displaySetInstanceUID, referencedImageId)) {
+      return activeViewportId;
+    }
+
+    return (
+      [...this.viewportsById.values()].find(viewportInfo =>
+        viewportInfo.contains(displaySetInstanceUID, referencedImageId)
+      )?.viewportId ?? null
+    );
+  }
+
   private async _setStackViewport(
     viewport: Types.IStackViewport,
     viewportData: StackViewportData,
     viewportInfo: ViewportInfo,
-    presentations: Presentations
+    presentations: Presentations = {}
   ): Promise<void> {
     const displaySetOptions = viewportInfo.getDisplaySetOptions();
 
@@ -383,10 +586,7 @@ class CornerstoneViewportService extends PubSubService implements IViewportServi
 
     return viewport.setStack(imageIds, initialImageIndexToUse).then(() => {
       viewport.setProperties({ ...properties });
-      const camera = presentations.positionPresentation?.camera;
-      if (camera) {
-        viewport.setCamera(camera);
-      }
+      this.setPresentations(viewport.id, presentations);
     });
   }
 
@@ -454,7 +654,7 @@ class CornerstoneViewportService extends PubSubService implements IViewportServi
     viewport: Types.IVolumeViewport,
     viewportData: VolumeViewportData,
     viewportInfo: ViewportInfo,
-    presentations: Presentations
+    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
@@ -558,7 +758,7 @@ class CornerstoneViewportService extends PubSubService implements IViewportServi
       viewport.setProperties(properties, volumeId);
     });
 
-    this.setPresentations(viewport, presentations);
+    this.setPresentations(viewport.id, presentations);
 
     // load any secondary displaySets
     const displaySetInstanceUIDs = this.viewportsDisplaySets.get(viewport.id);
@@ -712,7 +912,7 @@ class CornerstoneViewportService extends PubSubService implements IViewportServi
   }
 
   _setDisplaySets(
-    viewport: StackViewport | VolumeViewport,
+    viewport: Types.IViewport,
     viewportData: StackViewportData | VolumeViewportData,
     viewportInfo: ViewportInfo,
     presentations: Presentations = {}
@@ -724,16 +924,18 @@ class CornerstoneViewportService extends PubSubService implements IViewportServi
         viewportInfo,
         presentations
       );
-    } else if (viewport instanceof VolumeViewport || viewport instanceof VolumeViewport3D) {
+    }
+
+    if ([VolumeViewport, VolumeViewport3D].some(type => viewport instanceof type)) {
       return this._setVolumeViewport(
-        viewport,
+        viewport as Types.IVolumeViewport,
         viewportData as VolumeViewportData,
         viewportInfo,
         presentations
       );
-    } else {
-      throw new Error('Unknown viewport type');
     }
+
+    throw new Error('Unknown viewport type');
   }
 
   /**
@@ -763,8 +965,8 @@ class CornerstoneViewportService extends PubSubService implements IViewportServi
       const { dimensions } = imageVolume;
       const slabThickness = Math.sqrt(
         dimensions[0] * dimensions[0] +
-        dimensions[1] * dimensions[1] +
-        dimensions[2] * dimensions[2]
+          dimensions[1] * dimensions[1] +
+          dimensions[2] * dimensions[2]
       );
 
       return slabThickness;
@@ -799,32 +1001,57 @@ class CornerstoneViewportService extends PubSubService implements IViewportServi
     }
   }
 
-  /**
-   * Looks through the viewports to see if the specified measurement can be
-   * displayed in one of the viewports.
-   *
-   * @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,
-    displaySetInstanceUID: string,
-    cameraProps: unknown
-  ): string {
-    const viewportInfo = this.getViewportInfo(activeViewportId);
-    const { referencedImageId } = cameraProps;
-    if (viewportInfo?.contains(displaySetInstanceUID, referencedImageId)) {
-      return activeViewportId;
+  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();
     }
 
-    return (
-      [...this.viewportsById.values()].find(viewportInfo =>
-        viewportInfo.contains(displaySetInstanceUID, referencedImageId)
-      )?.viewportId ?? null
-    );
+    // Clear the queue after processing viewport resizes
+    this.resizeQueue = [];
+  }
+
+  private performResize() {
+    const isImmediate = false;
+
+    const viewports = this.getRenderingEngine().getViewports();
+
+    // Store the current position presentations for each viewport.
+    viewports.forEach(({ id }) => {
+      const presentation = this.getPositionPresentation(id);
+      this.beforeResizePositionPresentations.set(id, presentation);
+    });
+
+    // Resize the rendering engine and render.
+    const renderingEngine = this.renderingEngine;
+    renderingEngine.resize(isImmediate);
+    renderingEngine.render();
+
+    // Reset the camera for viewports that should reset their camera on resize,
+    // 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();
+  }
+
+  private resetGridResizeTimeout() {
+    clearTimeout(this.gridResizeTimeOut);
+    this.gridResizeTimeOut = setTimeout(() => {
+      this.gridResizeTimeOut = null;
+    }, this.gridResizeDelay);
   }
 }
 

extensions/cornerstone/src/services/ViewportService/IViewportService.ts

@@ -1,6 +1,7 @@
 import { Types } from '@cornerstonejs/core';
-import { StackData, VolumeData } from '../../types/CornerstoneCacheService';
-import { DisplaySetOptions, PublicViewportOptions, ViewportOptions } from './Viewport';
+import { StackViewportData, VolumeViewportData } from '../../types/CornerstoneCacheService';
+import { DisplaySetOptions, PublicViewportOptions } from './Viewport';
+import { Presentations } from '../../types/Presentation';
 
 /**
  * Handles cornerstone viewport logic including enabling, disabling, and
@@ -36,7 +37,7 @@ export interface IViewportService {
    * the element for resizing events
    * @param {*} elementRef
    */
-  resize(element: HTMLDivElement): void;
+  resize(isGridResize: boolean): void;
   /**
    * Removes the viewport from cornerstone, and destroys the rendering engine
    */
@@ -55,8 +56,10 @@ export interface IViewportService {
    * @returns
    */
   setViewportData(
-    viewportData: StackData | VolumeData,
+    viewportId: string,
+    viewportData: StackViewportData | VolumeViewportData,
     publicViewportOptions: PublicViewportOptions,
-    publicDisplaySetOptions: DisplaySetOptions[]
+    publicDisplaySetOptions: DisplaySetOptions[],
+    presentations?: Presentations
   ): void;
 }

extensions/cornerstone/src/services/ViewportService/Viewport.ts

@@ -238,6 +238,11 @@ class ViewportInfo {
     return this.viewportOptions;
   }
 
+  public getPresentationIds(): CoreTypes.PresentationIds {
+    const { presentationIds } = this.viewportOptions;
+    return presentationIds;
+  }
+
   public setDisplaySetOptions(displaySetOptions: Array<DisplaySetOptions>): void {
     this.displaySetOptions = displaySetOptions;
   }

extensions/cornerstone/src/types/Presentation.ts

@@ -1,23 +1,45 @@
-/** Store presentation data for either stack viewports or volume viewports */
-import { Types } from '@cornerstonejs/core';
-import { Types as CoreTypes } from '@ohif/core';
+import type { Types } from '@cornerstonejs/core';
 
 /**
- * Has information on the presentation of the viewport.
+ * Represents a position presentation in a viewport. This is basically
+ * viewport specific camera position and zoom, and not the display set
  */
-export interface Presentation extends Types.StackViewportProperties {
-  presentationIds: CoreTypes.PresentationIds;
+export type PositionPresentation = {
+  id: string;
   viewportType: string;
-  initialImageIndex: number;
-  camera: Types.ICamera;
-  properties: Types.StackViewportProperties | Types.VolumeViewportProperties;
-  zoom?: number;
-  pan?: [number, number];
+  presentation: {
+    initialImageIndex: number;
+    viewUp: Types.Point3;
+    viewPlaneNormal: Types.Point3;
+    zoom?: number;
+    pan?: Types.Point2;
+  };
+};
+
+/**
+ * Represents a LUT presentation in a viewport, and is really related
+ * to displaySets and not the viewport itself. So that is why it can
+ * be an object with volumeId keys, or a single object with the properties
+ * itself
+ */
+export interface LutPresentation {
+  id: string;
+  viewportType: string;
+  presentation: Record<string, Types.ViewportProperties> | Types.ViewportProperties;
 }
 
+/**
+ * Presentation can be a PositionPresentation or a LutPresentation.
+ */
+type Presentation = PositionPresentation | LutPresentation;
+
+/**
+ * Viewport presentations object that can contain a positionPresentation
+ * and or a lutPresentation.
+ */
 export type Presentations = {
-  positionPresentation?: Presentation;
-  lutPresentation?: Presentation;
+  positionPresentation?: PositionPresentation;
+  lutPresentation?: LutPresentation;
 };
 
 export default Presentation;

extensions/cornerstone/src/utils/CornerstoneViewportDownloadForm.tsx

@@ -93,6 +93,7 @@ const CornerstoneViewportDownloadForm = ({
       renderingEngine.resize();
 
       // Trigger the render on the viewport to update the on screen
+      downloadViewport.resetCamera();
       downloadViewport.render();
 
       downloadViewportElement.addEventListener(
@@ -223,7 +224,6 @@ const CornerstoneViewportDownloadForm = ({
       minimumSize={MINIMUM_SIZE}
       maximumSize={MAX_TEXTURE_SIZE}
       defaultSize={DEFAULT_SIZE}
-      canvasClass={'cornerstone-canvas'}
       activeViewportElement={activeViewportElement}
       enableViewport={enableViewport}
       disableViewport={disableViewport}