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import { buildPlanarActorEntry } from './buildPlanarActorEntry';
import CanvasActor from '../../CanvasActor';
import calculateTransform from '../../helpers/cpuFallback/rendering/calculateTransform';
import canvasToPixel from '../../helpers/cpuFallback/rendering/canvasToPixel';
import correctShift from '../../helpers/cpuFallback/rendering/correctShift';
import getDefaultViewport from '../../helpers/cpuFallback/rendering/getDefaultViewport';
import { getDefaultImageVOIRange } from '../../helpers/planarImageRendering';
import resizeEnabledElement from '../../helpers/cpuFallback/rendering/resize';
import drawImageSync from '../../helpers/cpuFallback/drawImageSync';
import { resolveCPUFallbackColormap } from '../../helpers/cpuFallback/colors';
import {
InterpolationType,
MetadataModules,
ViewportType,
Events,
ViewportStatus,
} from '../../../enums';
import { loadAndCacheImage } from '../../../loaders/imageLoader';
import * as metaData from '../../../metaData';
import { ActorRenderMode } from '../../../types';
import { getImageDataMetadata } from '../../../utilities/getImageDataMetadata';
import triggerEvent from '../../../utilities/triggerEvent';
import uuidv4 from '../../../utilities/uuidv4';
import { toWindowLevel } from '../../../utilities/windowLevel';
import type {
CPUIImageData,
CPUFallbackEnabledElement,
IImage,
Point2,
Point3,
} from '../../../types';
import type { IViewport } from '../../../types/IViewport';
import type {
DataAddOptions,
LoadedData,
RenderPathAttachment,
RenderPathDefinition,
RenderPath,
} from '../ViewportArchitectureTypes';
import type {
PlanarViewState,
PlanarDataPresentation,
PlanarCpuImageAdapterContext,
PlanarPayload,
PlanarResolvedICamera,
PlanarViewportRenderContext,
} from './PlanarViewportTypes';
import type { PlanarCpuImageRendering } from './planarRuntimeTypes';
import type { DerivedPlanarPresentation } from './planarRenderCamera';
import {
resolvePlanarCpuImageDisplayedArea,
resolvePlanarCpuViewportScale,
} from './planarCpuViewportMath';
import { triggerPlanarNewImage } from './planarImageEvents';
import {
canvasToWorldPlanarRenderPathProjection,
resolvePlanarRenderPathCurrentImageIdIndex,
resolvePlanarRenderPathProjection,
worldToCanvasPlanarRenderPathProjection,
} from './planarRenderPathProjection';
/** @internal */
export class CpuImageSliceRenderPath
implements RenderPath<PlanarCpuImageAdapterContext>
{
async addData(
ctx: PlanarCpuImageAdapterContext,
data: LoadedData,
options: DataAddOptions
): Promise<RenderPathAttachment<PlanarDataPresentation>> {
const payload: PlanarPayload = data as unknown as LoadedData<PlanarPayload>;
if (!payload.image) {
throw new Error('[PlanarViewport] CPU rendering requires an image');
}
ctx.display.activateRenderMode(ActorRenderMode.CPU_IMAGE);
let rendering: PlanarCpuImageRendering;
markCpuImagePreScaled(payload.image);
const compatibilityActor = new CanvasActor(
{
getImageData: () => this.getImageData(rendering),
} as unknown as IViewport,
payload.image
);
compatibilityActor.setVisibility(true);
const defaultViewport = getDefaultViewport(
ctx.cpu.canvas,
payload.image,
getCPUFallbackViewportModality(payload.image)
);
defaultViewport.displayedArea = resolvePlanarCpuImageDisplayedArea(
payload.image
);
const enabledElement = {
canvas: ctx.cpu.canvas,
image: payload.image,
renderingTools: {},
viewport: defaultViewport,
} as CPUFallbackEnabledElement;
resizeEnabledElement(enabledElement, true);
enabledElement.transform = calculateTransform(enabledElement);
rendering = {
renderMode: ActorRenderMode.CPU_IMAGE,
actorEntryUID: uuidv4(),
enabledElement,
compatibilityActor,
currentImageIdIndex: payload.initialImageIdIndex ?? 0,
defaultVOIRange: getDefaultImageVOIRange(payload.image),
dataPresentation: undefined,
fitScale: getCPUFallbackScalarScale(enabledElement.viewport.scale),
loadRequestId: 0,
renderingInvalidated: true,
};
triggerPlanarNewImage(ctx, {
image: payload.image,
imageIdIndex: payload.initialImageIdIndex ?? 0,
});
return {
rendering,
updateDataPresentation: (props) => {
this.updateDataPresentation(rendering, props);
},
applyViewState: (camera) => {
this.applyViewState(ctx, rendering, data.id, camera, payload.imageIds);
},
getFrameOfReferenceUID: () => {
return this.getFrameOfReferenceUID(rendering);
},
getActorEntry: (data) => {
return buildPlanarActorEntry(data as LoadedData<PlanarPayload>, {
actor: rendering.compatibilityActor,
mapper: rendering.compatibilityActor.getMapper(),
renderMode: ActorRenderMode.CPU_IMAGE,
uid: rendering.actorEntryUID,
referencedIdFallback: rendering.enabledElement.image?.imageId,
});
},
getImageData: () => {
return this.getImageData(rendering);
},
render: () => {
this.render(ctx, rendering, data.id);
},
resize: () => {
this.resize(ctx, rendering, data.id);
},
removeData: () => {
this.removeData(ctx, rendering);
},
};
}
private updateDataPresentation(
rendering: PlanarCpuImageRendering,
props: unknown
): void {
rendering.dataPresentation = props as PlanarDataPresentation | undefined;
applyDataPresentation(rendering, rendering.dataPresentation);
}
private applyViewState(
ctx: PlanarCpuImageAdapterContext,
rendering: PlanarCpuImageRendering,
dataId: string,
camera: unknown,
imageIds: string[]
): void {
const planarCamera = camera as PlanarViewState | undefined;
const image = rendering.enabledElement.image;
ctx.display.activateRenderMode(ActorRenderMode.CPU_IMAGE);
const projection = image
? resolvePlanarRenderPathProjection({
ctx,
dataId,
imageIds,
rendering,
viewState: planarCamera,
})
: undefined;
const nextImageIdIndex = resolvePlanarRenderPathCurrentImageIdIndex({
projection,
rendering,
viewState: planarCamera,
});
if (projection) {
applyPresentationState(
rendering,
projection.presentation,
projection.resolvedICamera
);
}
// See VtkImageMapperRenderPath for context on why this dedupes against
// lastRequestedImageIdIndex instead of currentImageIdIndex.
const dedupTarget =
rendering.lastRequestedImageIdIndex ?? rendering.currentImageIdIndex;
if (nextImageIdIndex === dedupTarget) {
return;
}
if (nextImageIdIndex < 0 || nextImageIdIndex >= imageIds.length) {
return;
}
rendering.lastRequestedImageIdIndex = nextImageIdIndex;
const requestId = ++rendering.loadRequestId;
void loadAndCacheImage(imageIds[nextImageIdIndex]).then((image) => {
if (requestId !== rendering.loadRequestId) {
return;
}
void updateRenderedImage({
ctx,
dataId,
image,
imageIdIndex: nextImageIdIndex,
props: rendering.dataPresentation,
rendering,
});
});
}
private canvasToWorld(
ctx: PlanarCpuImageAdapterContext,
rendering: PlanarCpuImageRendering,
canvasPos: Point2
): Point3 {
return canvasToWorldPlanarRenderPathProjection({
canvas: ctx.cpu.canvas,
canvasPos,
ctx,
});
}
private worldToCanvas(
ctx: PlanarCpuImageAdapterContext,
rendering: PlanarCpuImageRendering,
worldPos: Point3
): Point2 {
return worldToCanvasPlanarRenderPathProjection({
canvas: ctx.cpu.canvas,
ctx,
worldPos,
});
}
private getFrameOfReferenceUID(
rendering: PlanarCpuImageRendering
): string | undefined {
const imageId = rendering.enabledElement.image?.imageId;
const imagePlaneModule = imageId
? (metaData.get(MetadataModules.IMAGE_PLANE, imageId) as
| { frameOfReferenceUID?: string }
| undefined)
: undefined;
return imagePlaneModule?.frameOfReferenceUID;
}
private getImageData(
rendering: PlanarCpuImageRendering
): CPUIImageData | undefined {
const image = rendering.enabledElement.image;
if (!image) {
return;
}
return buildPlanarImageData(image, this.getFrameOfReferenceUID(rendering));
}
private render(
ctx: PlanarCpuImageAdapterContext,
rendering: PlanarCpuImageRendering,
dataId: string
): void {
if (!ctx.viewport.isCurrentDataId(dataId)) {
return;
}
renderCPUImage(rendering);
renderCompatibilityOverlayActors(ctx);
ctx.display.markRendered();
triggerEvent(ctx.viewport.element, Events.IMAGE_RENDERED, {
element: ctx.viewport.element,
viewportId: ctx.viewportId,
renderingEngineId: ctx.renderingEngineId,
viewportStatus: ViewportStatus.RENDERED,
});
}
private resize(
ctx: PlanarCpuImageAdapterContext,
rendering: PlanarCpuImageRendering,
dataId: string
): void {
resizeEnabledElement(rendering.enabledElement, true);
const image = rendering.enabledElement.image;
const camera = ctx.viewport.getViewState();
if (!image) {
return;
}
const projection = resolvePlanarRenderPathProjection({
ctx,
dataId,
rendering,
viewState: camera,
});
rendering.fitScale = getCPUFallbackScalarScale(
getDefaultViewport(
rendering.enabledElement.canvas,
image,
getCPUFallbackViewportModality(image)
).scale
);
rendering.renderingInvalidated = true;
if (projection) {
applyPresentationState(
rendering,
projection.presentation,
projection.resolvedICamera
);
}
}
private removeData(
ctx: PlanarCpuImageAdapterContext,
rendering: PlanarCpuImageRendering
): void {
const { enabledElement } = rendering;
ctx.cpu.context.setTransform(1, 0, 0, 1, 0, 0);
ctx.cpu.context.clearRect(
0,
0,
ctx.cpu.canvas.width,
ctx.cpu.canvas.height
);
enabledElement.image = undefined;
}
}
/** @internal */
export class CpuImageSlicePath
implements
RenderPathDefinition<
PlanarViewportRenderContext,
PlanarCpuImageAdapterContext
>
{
readonly id = 'planar:cpu-image-slice';
readonly type = ViewportType.PLANAR_NEXT;
matches(data: LoadedData, options: DataAddOptions): boolean {
return (
data.type === 'image' && options.renderMode === ActorRenderMode.CPU_IMAGE
);
}
createRenderPath() {
return new CpuImageSliceRenderPath();
}
selectContext(
rootContext: PlanarViewportRenderContext
): PlanarCpuImageAdapterContext {
return {
viewportId: rootContext.viewportId,
renderingEngineId: rootContext.renderingEngineId,
type: rootContext.type,
viewport: rootContext.viewport,
renderPath: rootContext.renderPath,
view: rootContext.view,
display: rootContext.display,
cpu: rootContext.cpu,
};
}
}
function applyDataPresentation(
rendering: PlanarCpuImageRendering,
props?: PlanarDataPresentation
): void {
const { enabledElement, defaultVOIRange } = rendering;
const { viewport } = enabledElement;
const canvas = enabledElement.canvas as HTMLCanvasElement;
const voiRange = props?.voiRange ?? defaultVOIRange;
canvas.style.display = props?.visible === false ? 'none' : '';
canvas.style.opacity = String(props?.opacity ?? 1);
viewport.colormap = resolveCPUFallbackColormap(
props?.colormap,
enabledElement.image?.colormap
);
viewport.invert = props?.invert ?? false;
if (voiRange) {
const { windowCenter, windowWidth } = toWindowLevel(
voiRange.lower,
voiRange.upper
);
viewport.voi = {
windowCenter,
windowWidth,
voiLUTFunction: enabledElement.image?.voiLUTFunction,
};
}
rendering.renderingInvalidated = true;
if (props?.interpolationType !== undefined) {
viewport.pixelReplication =
props.interpolationType !== InterpolationType.LINEAR;
}
}
function getCPUFallbackScalarScale(scale?: number | Point2): number {
return Array.isArray(scale) ? scale[1] : (scale ?? 1);
}
function applyPresentationState(
rendering: PlanarCpuImageRendering,
presentation?: DerivedPlanarPresentation,
activeSourceICamera?: PlanarResolvedICamera
): void {
const { enabledElement, fitScale } = rendering;
const viewport = enabledElement.viewport as Omit<
CPUFallbackEnabledElement['viewport'],
'scale'
> & {
scale?: number | Point2;
};
const desiredPan = presentation?.pan ?? [0, 0];
const zoom = Math.max(presentation?.zoom ?? 1, 0.001);
viewport.hflip = presentation?.flipHorizontal ?? false;
viewport.vflip = presentation?.flipVertical ?? false;
viewport.rotation = presentation?.rotation ?? 0;
viewport.scale =
typeof activeSourceICamera?.parallelScale === 'number'
? resolvePlanarCpuViewportScale({
canvas: enabledElement.canvas,
parallelScale: activeSourceICamera.parallelScale,
presentationScale: activeSourceICamera.presentationScale,
columnPixelSpacing: enabledElement.image?.columnPixelSpacing || 1,
rowPixelSpacing: enabledElement.image?.rowPixelSpacing || 1,
})
: [fitScale * (presentation?.scale?.[0] ?? zoom), fitScale * zoom];
viewport.parallelScale = activeSourceICamera?.parallelScale;
viewport.translation = activeSourceICamera?.focalPoint
? resolveCPUImageViewportTranslationFromFocalPoint(
enabledElement,
activeSourceICamera.focalPoint
)
: resolveCPUImageViewportTranslation(enabledElement, desiredPan);
enabledElement.transform = calculateTransform(enabledElement);
}
function resolveCPUImageViewportTranslationFromFocalPoint(
enabledElement: CPUFallbackEnabledElement,
focalPoint: Point3
): { x: number; y: number } {
const { image, viewport } = enabledElement;
const originalTranslation = viewport.translation || { x: 0, y: 0 };
if (!image) {
return originalTranslation;
}
viewport.translation = { x: 0, y: 0 };
enabledElement.transform = calculateTransform(enabledElement);
const referencePoint = canvasToPixel(enabledElement, [
enabledElement.canvas.width / 2,
enabledElement.canvas.height / 2,
]);
const targetPoint = worldToCPUImageDrawPoint(enabledElement, focalPoint);
const shift = correctShift(
{
x: targetPoint[0] - referencePoint[0],
y: targetPoint[1] - referencePoint[1],
},
viewport
);
viewport.translation = originalTranslation;
return {
x: -shift.x,
y: -shift.y,
};
}
function resolveCPUImageViewportTranslation(
enabledElement: CPUFallbackEnabledElement,
desiredPan: Point2
): { x: number; y: number } {
const { viewport } = enabledElement;
const originalTranslation = viewport.translation || { x: 0, y: 0 };
viewport.translation = { x: 0, y: 0 };
const baseOrigin = calculateTransform(enabledElement).transformPoint([0, 0]);
viewport.translation = { x: 1, y: 0 };
const translatedXOrigin = calculateTransform(enabledElement).transformPoint([
0, 0,
]);
viewport.translation = { x: 0, y: 1 };
const translatedYOrigin = calculateTransform(enabledElement).transformPoint([
0, 0,
]);
viewport.translation = originalTranslation;
const deltaX: Point2 = [
translatedXOrigin[0] - baseOrigin[0],
translatedXOrigin[1] - baseOrigin[1],
];
const deltaY: Point2 = [
translatedYOrigin[0] - baseOrigin[0],
translatedYOrigin[1] - baseOrigin[1],
];
const determinant = deltaX[0] * deltaY[1] - deltaX[1] * deltaY[0];
if (Math.abs(determinant) < 1e-6) {
return { x: 0, y: 0 };
}
return {
x: (desiredPan[0] * deltaY[1] - desiredPan[1] * deltaY[0]) / determinant,
y: (deltaX[0] * desiredPan[1] - deltaX[1] * desiredPan[0]) / determinant,
};
}
function worldToCPUImageDrawPoint(
enabledElement: CPUFallbackEnabledElement,
worldPos: Point3
): Point2 {
const { image, viewport } = enabledElement;
if (!image) {
return [0, 0];
}
const { spacing, direction, origin } = getImageDataMetadata(image);
const rowVector = direction.slice(0, 3) as Point3;
const columnVector = direction.slice(3, 6) as Point3;
const displayedArea = viewport.displayedArea;
const sourceX = (displayedArea?.tlhc.x ?? 1) - 1;
const sourceY = (displayedArea?.tlhc.y ?? 1) - 1;
const diff = vec3.subtract(
vec3.create(),
worldPos as unknown as vec3,
origin as unknown as vec3
);
return [
vec3.dot(diff, rowVector as unknown as vec3) / spacing[0] + 0.5 - sourceX,
vec3.dot(diff, columnVector as unknown as vec3) / spacing[1] +
0.5 -
sourceY,
];
}
/**
* Mirror legacy StackViewport._setCSImage: when the cached image's pixel data is
* already pre-scaled (modality rescale baked in), flag it so the CPUFallback
* renderer skips the modality LUT. Without this the renderer
* (generateLut/getDefaultViewport/renderGrayscaleImage all branch on
* image.isPreScaled) re-applies slope/intercept on top of already-scaled data,
* shifting every pixel down by the rescale intercept — e.g. a CT renders far too
* dark, with only the densest bone surviving the window.
*/
function markCpuImagePreScaled(image: IImage): void {
image.isPreScaled = image.preScale?.scaled;
}
function getCPUFallbackViewportModality(image: IImage): string | undefined {
return (
image.preScale?.scalingParameters?.modality ||
(
metaData.get(MetadataModules.GENERAL_SERIES, image.imageId) as
| { modality?: string }
| undefined
)?.modality
);
}
export function buildPlanarImageData(
image: IImage,
frameOfReferenceUID?: string
): CPUIImageData {
const metadata = getImageDataMetadata(image);
const { dimensions, direction, modality, origin, spacing } = metadata;
// getImageDataMetadata().calibration is the DICOM calibration module; the USER
// calibration (CalibrationLine -> calibratedPixelSpacing provider) is stored
// separately, so merge it on top — mirroring legacy StackViewport.getImageData()
// (`calibration: { ...csImage.calibration, ...this.calibration }`). Without this,
// native getImageData().calibration ignores user calibration and length tools never
// rescale after calibrateImageSpacing().
const userCalibration = metaData.get(
'calibratedPixelSpacing',
image.imageId
) as Record<string, unknown> | undefined;
const calibration = userCalibration
? { ...metadata.calibration, ...userCalibration }
: metadata.calibration;
const rowVector = direction.slice(0, 3) as Point3;
const columnVector = direction.slice(3, 6) as Point3;
const scalarData =
image.voxelManager?.getScalarData() || image.getPixelData?.();
return {
dimensions,
spacing,
origin,
direction,
metadata: {
Modality: modality,
FrameOfReferenceUID: frameOfReferenceUID,
},
imageData: {
getDirection: () => direction,
getDimensions: () => dimensions,
getScalarData: () => scalarData,
getSpacing: () => spacing,
worldToIndex: (point: Point3) => {
const diff = vec3.subtract(
vec3.create(),
point as unknown as vec3,
origin as unknown as vec3
);
return [
vec3.dot(diff, rowVector as unknown as vec3) / spacing[0],
vec3.dot(diff, columnVector as unknown as vec3) / spacing[1],
0,
] as Point3;
},
indexToWorld: (point: Point3) => {
const worldPoint = [...origin] as Point3;
vec3.scaleAndAdd(
worldPoint as unknown as vec3,
worldPoint as unknown as vec3,
rowVector as unknown as vec3,
point[0] * spacing[0]
);
vec3.scaleAndAdd(
worldPoint as unknown as vec3,
worldPoint as unknown as vec3,
columnVector as unknown as vec3,
point[1] * spacing[1]
);
return worldPoint;
},
},
scalarData,
scaling: image.scaling,
hasPixelSpacing: Boolean(image.rowPixelSpacing || image.columnPixelSpacing),
calibration,
preScale: image.preScale,
voxelManager: image.voxelManager,
};
}
function renderCPUImage(rendering: PlanarCpuImageRendering): void {
const { enabledElement, renderingInvalidated } = rendering;
if (!enabledElement.image) {
return;
}
drawImageSync(enabledElement, renderingInvalidated);
rendering.renderingInvalidated = false;
}
function renderCompatibilityOverlayActors(
ctx: PlanarCpuImageAdapterContext
): void {
const overlayActors = ctx.viewport.getOverlayActors();
for (const actorEntry of overlayActors) {
if (actorEntry.actorMapper?.renderMode !== ActorRenderMode.CPU_IMAGE) {
continue;
}
(actorEntry.actor as CanvasActor).render(
undefined as never,
ctx.cpu.context
);
}
}
async function updateRenderedImage(args: {
ctx: PlanarCpuImageAdapterContext;
dataId: string;
image: IImage;
imageIdIndex: number;
props?: PlanarDataPresentation;
rendering: PlanarCpuImageRendering;
}): Promise<void> {
const { ctx, dataId, image, imageIdIndex, props, rendering } = args;
const enabledElement = rendering.enabledElement;
markCpuImagePreScaled(image);
const camera = ctx.viewport.getViewState();
const defaultViewport = getDefaultViewport(
ctx.cpu.canvas,
image,
getCPUFallbackViewportModality(image)
);
const previousViewport = enabledElement.viewport;
defaultViewport.displayedArea = resolvePlanarCpuImageDisplayedArea(image);
enabledElement.image = image;
enabledElement.viewport = {
...defaultViewport,
hflip: previousViewport?.hflip ?? defaultViewport.hflip,
invert: defaultViewport.invert,
pixelReplication:
previousViewport?.pixelReplication ?? defaultViewport.pixelReplication,
rotation: previousViewport?.rotation ?? defaultViewport.rotation,
translation: previousViewport?.translation ?? defaultViewport.translation,
vflip: previousViewport?.vflip ?? defaultViewport.vflip,
};
rendering.currentImageIdIndex = imageIdIndex;
rendering.defaultVOIRange = getDefaultImageVOIRange(image);
rendering.fitScale = getCPUFallbackScalarScale(defaultViewport.scale);
rendering.renderingInvalidated = true;
ctx.viewport.invalidateResolvedView();
rendering.compatibilityActor
.getMapper()
.getInputData()
.setDerivedImage(image);
applyDataPresentation(rendering, props);
const projection = resolvePlanarRenderPathProjection({
ctx,
dataId,
rendering,
viewState: camera,
});
if (projection) {
applyPresentationState(
rendering,
projection.presentation,
projection.resolvedICamera
);
}
triggerPlanarNewImage(ctx, { image, imageIdIndex });
// cpuImage is drawn by the Planar viewport itself, not by the rendering
// engine's VTK pass. The image swap therefore needs an immediate viewport
// render or the visible canvas stays stale until another direct render.
ctx.display.renderNow();
}
|