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import vtkColorTransferFunction from '@kitware/vtk.js/Rendering/Core/ColorTransferFunction';
import {
cache,
getEnabledElementByIds,
StackViewport,
Types,
VolumeViewport,
} from '@cornerstonejs/core';
import Representations from '../../../enums/SegmentationRepresentations';
import * as SegmentationState from '../../../stateManagement/segmentation/segmentationState';
import { getToolGroup } from '../../../store/ToolGroupManager';
import type {
LabelmapConfig,
LabelmapRenderingConfig,
LabelmapSegmentationData,
} from '../../../types/LabelmapTypes';
import {
SegmentationRepresentationConfig,
ToolGroupSpecificRepresentation,
} from '../../../types/SegmentationStateTypes';
import addLabelmapToElement from './addLabelmapToElement';
import removeLabelmapFromElement from './removeLabelmapFromElement';
import { isVolumeSegmentation } from '../../segmentation/strategies/utils/stackVolumeCheck';
import { polySeg } from '../../../stateManagement/segmentation';
const MAX_NUMBER_COLORS = 255;
const labelMapConfigCache = new Map();
function getRepresentationRenderingConfig() {
const cfun = vtkColorTransferFunction.newInstance();
const ofun = vtkPiecewiseFunction.newInstance();
ofun.addPoint(0, 0);
return {
ofun,
cfun,
};
}
let polySegConversionInProgress = false;
/**
* For each viewport, and for each segmentation, set the segmentation for the viewport's enabled element
* Initializes the global and viewport specific state for the segmentation in the
* SegmentationStateManager.
* @param toolGroup - the tool group that contains the viewports
* @param segmentationRepresentationUID - The uid of the segmentation representation
* @param renderImmediate - If true, there will be a render call after the labelmap is removed
*/
function removeSegmentationRepresentation(
toolGroupId: string,
segmentationRepresentationUID: string,
renderImmediate = false
): void {
_removeLabelmapFromToolGroupViewports(
toolGroupId,
segmentationRepresentationUID
);
SegmentationState.removeSegmentationRepresentation(
toolGroupId,
segmentationRepresentationUID
);
Iif (renderImmediate) {
const viewportsInfo = getToolGroup(toolGroupId).getViewportsInfo();
viewportsInfo.forEach(({ viewportId, renderingEngineId }) => {
const enabledElement = getEnabledElementByIds(
viewportId,
renderingEngineId
);
enabledElement.viewport.render();
});
}
}
/**
* Checks if a segmentation data have the same frameOfReference as the series
* displayed in a given viewport
* @param viewport
* @param referencedVolumeId volume id of the segmentation reference series
* @returns
*/
function isSameFrameOfReference(viewport, referencedVolumeId) {
// if the referencedVolumeId is not defined, we acted as before to not break
// applications as referencedVolumeId is inserted in this change
// Can modify that in the future commits
Eif (!referencedVolumeId) {
return true;
}
const defaultActor = viewport.getDefaultActor();
if (!defaultActor) {
return false;
}
const { uid: defaultActorUID } = defaultActor;
const volume = cache.getVolume(defaultActorUID);
if (volume) {
const referencedVolume = cache.getVolume(referencedVolumeId);
if (
referencedVolume &&
volume.metadata.FrameOfReferenceUID ===
referencedVolume.metadata.FrameOfReferenceUID
) {
return true;
}
}
return false;
}
/**
* It takes the enabled element, the segmentation Id, and the configuration, and
* it sets the segmentation for the enabled element as a labelmap
* @param enabledElement - The cornerstone enabled element
* @param segmentationId - The id of the segmentation to be rendered.
* @param configuration - The configuration object for the labelmap.
*/
async function render(
viewport: Types.IVolumeViewport | Types.IStackViewport,
representation: ToolGroupSpecificRepresentation,
toolGroupConfig: SegmentationRepresentationConfig
): Promise<void> {
const {
colorLUTIndex,
active,
segmentationId,
segmentationRepresentationUID,
segmentsHidden,
config: renderingConfig,
} = representation;
const segmentation = SegmentationState.getSegmentation(segmentationId);
Iif (!segmentation) {
console.warn('No segmentation found for segmentationId: ', segmentationId);
return;
}
let labelmapData = segmentation.representationData[Representations.Labelmap];
let actorEntry = viewport.getActor(segmentationRepresentationUID);
Iif (
!labelmapData &&
polySeg.canComputeRequestedRepresentation(segmentationRepresentationUID) &&
!polySegConversionInProgress
) {
// meaning the requested segmentation representationUID does not have
// labelmap data, BUT we might be able to request a conversion from
// another representation to labelmap
// we need to check if we can request polySEG to convert the other
// underlying representations to Surface
polySegConversionInProgress = true;
labelmapData = await polySeg.computeAndAddLabelmapRepresentation(
segmentationId,
{
segmentationRepresentationUID,
viewport,
}
);
if (!labelmapData) {
throw new Error(
`No labelmap data found for segmentationId ${segmentationId}.`
);
}
polySegConversionInProgress = false;
}
Iif (!labelmapData) {
return;
}
if (isVolumeSegmentation(labelmapData, viewport)) {
Iif (viewport instanceof StackViewport) {
return;
}
const { volumeId: labelmapUID } = labelmapData;
const labelmap = cache.getVolume(labelmapUID);
Iif (!labelmap) {
throw new Error(`No Labelmap found for volumeId: ${labelmapUID}`);
}
Iif (!isSameFrameOfReference(viewport, labelmapData?.referencedVolumeId)) {
return;
}
if (!actorEntry) {
// only add the labelmap to ToolGroup viewports if it is not already added
await _addLabelmapToViewport(
viewport,
labelmapData,
segmentationRepresentationUID
);
}
actorEntry = viewport.getActor(segmentationRepresentationUID);
} else E{
if (viewport instanceof VolumeViewport) {
return;
}
// stack segmentation
const imageId = viewport.getCurrentImageId();
const { imageIdReferenceMap } = labelmapData;
// if the stack labelmap is not built for the current imageId that is
// rendered at the viewport then return
if (!imageIdReferenceMap.has(imageId)) {
return;
}
if (!actorEntry) {
// only add the labelmap to ToolGroup viewports if it is not already added
await _addLabelmapToViewport(
viewport,
labelmapData,
segmentationRepresentationUID
);
}
actorEntry = viewport.getActor(segmentationRepresentationUID);
}
Iif (!actorEntry) {
return;
}
const { cfun, ofun } = renderingConfig as LabelmapRenderingConfig;
const renderInactiveSegmentations =
toolGroupConfig.renderInactiveSegmentations;
_setLabelmapColorAndOpacity(
viewport.id,
actorEntry,
cfun,
ofun,
colorLUTIndex,
toolGroupConfig.representations[Representations.Labelmap],
representation,
active,
renderInactiveSegmentations,
segmentsHidden
);
}
function _setLabelmapColorAndOpacity(
viewportId: string,
actorEntry: Types.ActorEntry,
cfun: vtkColorTransferFunction,
ofun: vtkPiecewiseFunction,
colorLUTIndex: number,
toolGroupLabelmapConfig: LabelmapConfig,
segmentationRepresentation: ToolGroupSpecificRepresentation,
isActiveLabelmap: boolean,
renderInactiveSegmentations: boolean,
segmentsHidden: Set<number>
): void {
const { segmentSpecificConfig, segmentationRepresentationSpecificConfig } =
segmentationRepresentation;
const segmentationRepresentationLabelmapConfig =
segmentationRepresentationSpecificConfig[Representations.Labelmap];
// Note: MAX_NUMBER_COLORS = 256 is needed because the current method to generate
// the default color table uses RGB.
const colorLUT = SegmentationState.getColorLUT(colorLUTIndex);
const numColors = Math.min(256, colorLUT.length);
const { uid: actorUID } = actorEntry;
// Note: right now outlineWidth and renderOutline are not configurable
// at the segment level, so we don't need to check for segment specific
// configuration in the loop, Todo: make them configurable at the segment level
const { outlineWidth, renderOutline, outlineOpacity } = _getLabelmapConfig(
toolGroupLabelmapConfig,
segmentationRepresentationLabelmapConfig,
isActiveLabelmap
);
// Todo: the below loop probably can be optimized so that we don't hit it
// unless a config has changed. Right now we get into the following loop
// even for brush drawing which does not makes sense
for (let i = 0; i < numColors; i++) {
const segmentIndex = i;
const segmentColor = colorLUT[segmentIndex];
const segmentSpecificLabelmapConfig =
segmentSpecificConfig[segmentIndex]?.[Representations.Labelmap];
const { fillAlpha, outlineWidth, renderFill, renderOutline } =
_getLabelmapConfig(
toolGroupLabelmapConfig,
segmentationRepresentationLabelmapConfig,
isActiveLabelmap,
segmentSpecificLabelmapConfig
);
const { forceOpacityUpdate, forceColorUpdate } =
_needsTransferFunctionUpdate(viewportId, actorUID, segmentIndex, {
fillAlpha,
renderFill,
renderOutline,
segmentColor,
outlineWidth,
segmentsHidden,
});
if (forceColorUpdate) {
cfun.addRGBPoint(
segmentIndex,
segmentColor[0] / MAX_NUMBER_COLORS,
segmentColor[1] / MAX_NUMBER_COLORS,
segmentColor[2] / MAX_NUMBER_COLORS
);
}
if (forceOpacityUpdate) {
if (renderFill) {
const segmentOpacity = segmentsHidden.has(segmentIndex)
? 0
: (segmentColor[3] / 255) * fillAlpha;
ofun.removePoint(segmentIndex);
ofun.addPointLong(segmentIndex, segmentOpacity, 0.5, 1.0);
} else E{
ofun.addPointLong(segmentIndex, 0.01, 0.5, 1.0);
}
}
}
const actor = actorEntry.actor as Types.VolumeActor;
actor.getProperty().setRGBTransferFunction(0, cfun);
ofun.setClamping(false);
actor.getProperty().setScalarOpacity(0, ofun);
actor.getProperty().setInterpolationTypeToNearest();
actor.getProperty().setUseLabelOutline(renderOutline);
// @ts-ignore - fix type in vtk
actor.getProperty().setLabelOutlineOpacity(outlineOpacity);
const { activeSegmentIndex } = SegmentationState.getSegmentation(
segmentationRepresentation.segmentationId
);
// create an array that contains all the segment indices and for the active
// segment index, use the activeSegmentOutlineWidthDelta, otherwise use the
// outlineWidth
// Pre-allocate the array with the required size to avoid dynamic resizing.
const outlineWidths = new Array(numColors - 1);
for (let i = 1; i < numColors; i++) {
// Start from 1 to skip the background segment index.
const isHidden = segmentsHidden.has(i);
Iif (isHidden) {
outlineWidths[i - 1] = 0;
continue;
}
outlineWidths[i - 1] =
i === activeSegmentIndex
? outlineWidth + toolGroupLabelmapConfig.activeSegmentOutlineWidthDelta
: outlineWidth;
}
actor.getProperty().setLabelOutlineThickness(outlineWidths);
// Set visibility based on whether actor visibility is specifically asked
// to be turned on/off (on by default) AND whether is is in active but
// we are rendering inactive labelmap
const visible = isActiveLabelmap || renderInactiveSegmentations;
actor.setVisibility(visible);
}
function _getLabelmapConfig(
toolGroupLabelmapConfig: LabelmapConfig,
segmentationRepresentationLabelmapConfig: LabelmapConfig,
isActiveLabelmap: boolean,
segmentsLabelmapConfig?: LabelmapConfig
) {
const segmentLabelmapConfig = segmentsLabelmapConfig || {};
const configToUse = {
...toolGroupLabelmapConfig,
...segmentationRepresentationLabelmapConfig,
...segmentLabelmapConfig,
};
const fillAlpha = isActiveLabelmap
? configToUse.fillAlpha
: configToUse.fillAlphaInactive;
const outlineWidth = isActiveLabelmap
? configToUse.outlineWidthActive
: configToUse.outlineWidthInactive;
const renderFill = isActiveLabelmap
? configToUse.renderFill
: configToUse.renderFillInactive;
const renderOutline = configToUse.renderOutline;
const outlineOpacity = isActiveLabelmap
? configToUse.outlineOpacity
: configToUse.outlineOpacityInactive;
return {
fillAlpha,
outlineWidth,
renderFill,
renderOutline,
outlineOpacity,
};
}
function _needsTransferFunctionUpdate(
viewportId: string,
actorUID: string,
segmentIndex: number,
{
fillAlpha,
renderFill,
renderOutline,
segmentColor,
outlineWidth,
segmentsHidden,
}: {
fillAlpha: number;
renderFill: boolean;
renderOutline: boolean;
outlineWidth: number;
segmentColor: number[];
segmentsHidden: Set<number>;
}
) {
const cacheUID = `${viewportId}-${actorUID}-${segmentIndex}`;
const oldConfig = labelMapConfigCache.get(cacheUID);
if (!oldConfig) {
labelMapConfigCache.set(cacheUID, {
fillAlpha,
renderFill,
renderOutline,
outlineWidth,
segmentColor: segmentColor.slice(), // Create a copy
segmentsHidden: new Set(segmentsHidden), // Create a copy
});
return {
forceOpacityUpdate: true,
forceColorUpdate: true,
};
}
const {
fillAlpha: oldFillAlpha,
renderFill: oldRenderFill,
renderOutline: oldRenderOutline,
outlineWidth: oldOutlineWidth,
segmentColor: oldSegmentColor,
segmentsHidden: oldSegmentsHidden,
} = oldConfig;
const forceColorUpdate =
oldSegmentColor[0] !== segmentColor[0] ||
oldSegmentColor[1] !== segmentColor[1] ||
oldSegmentColor[2] !== segmentColor[2];
const forceOpacityUpdate =
oldSegmentColor[3] !== segmentColor[3] ||
oldFillAlpha !== fillAlpha ||
oldRenderFill !== renderFill ||
oldRenderOutline !== renderOutline ||
oldOutlineWidth !== outlineWidth ||
oldSegmentsHidden.has(segmentIndex) !== segmentsHidden.has(segmentIndex);
// update the cache
labelMapConfigCache.set(cacheUID, {
fillAlpha,
renderFill,
renderOutline,
outlineWidth,
segmentColor: segmentColor.slice(), // Create a copy
segmentsHidden: new Set(segmentsHidden), // Create a copy
});
return {
forceOpacityUpdate,
forceColorUpdate,
};
}
function _removeLabelmapFromToolGroupViewports(
toolGroupId: string,
segmentationRepresentationUID: string
): void {
const toolGroup = getToolGroup(toolGroupId);
Iif (toolGroup === undefined) {
throw new Error(`ToolGroup with ToolGroupId ${toolGroupId} does not exist`);
}
const { viewportsInfo } = toolGroup;
for (const viewportInfo of viewportsInfo) {
const { viewportId, renderingEngineId } = viewportInfo;
const enabledElement = getEnabledElementByIds(
viewportId,
renderingEngineId
);
removeLabelmapFromElement(
enabledElement.viewport.element,
segmentationRepresentationUID
);
}
}
async function _addLabelmapToViewport(
viewport: Types.IVolumeViewport | Types.IStackViewport,
labelmapData: LabelmapSegmentationData,
segmentationRepresentationUID
): Promise<void> {
await addLabelmapToElement(
viewport.element,
labelmapData,
segmentationRepresentationUID
);
}
export default {
getRepresentationRenderingConfig,
render,
removeSegmentationRepresentation,
};
export {
getRepresentationRenderingConfig,
render,
removeSegmentationRepresentation,
};
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