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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 | import type { ICamera, Point2, Point3 } from '../../../types';
import type DisplayArea from '../../../types/displayArea';
import type { ProjectionScale } from '../ViewportProjectionTypes';
import { clonePlanarScale, getPlanarScaleZoom } from './planarCameraScale';
import { getPlanarProjectionFallbackPan } from './planarProjectionFallback';
import {
PLANAR_PROJECTION_ID,
type PlanarProjectionRequest,
type PlanarProjectionSnapshot,
} from './PlanarProjectionTypes';
import { normalizePlanarRotation } from './planarViewPresentation';
import { cloneDisplayArea, normalizePlanarViewState } from './planarViewState';
import type { PlanarDisplayArea, PlanarViewState } from './PlanarViewportTypes';
function clonePoint2(point: Point2): Point2 {
return [point[0], point[1]];
}
function clonePoint3(point: Point3): Point3 {
return [point[0], point[1], point[2]];
}
function getProjectionScale(args: {
displayArea?: PlanarDisplayArea;
scaleMode?: PlanarViewState['scaleMode'];
zoom: number;
}): ProjectionScale {
const { displayArea, scaleMode, zoom } = args;
if (displayArea) {
return {
kind: 'displayArea',
value: zoom,
area: displayArea as unknown as DisplayArea,
};
}
if (scaleMode === 'fitWidth') {
return { kind: 'fitWidth', value: zoom };
}
if (scaleMode === 'fitHeight') {
return { kind: 'fitHeight', value: zoom };
}
return { kind: 'fit', value: zoom };
}
function getProjectionPosition(
viewState: PlanarViewState,
rendererCamera?: ICamera<unknown>
) {
if (viewState.anchorWorld) {
return {
kind: 'anchor' as const,
worldPoint: clonePoint3(viewState.anchorWorld),
canvasPoint: clonePoint2(viewState.anchorCanvas ?? [0.5, 0.5]),
};
}
if (rendererCamera?.focalPoint) {
return {
kind: 'focalPoint' as const,
worldPoint: clonePoint3(rendererCamera.focalPoint as Point3),
};
}
return {
kind: 'anchor' as const,
canvasPoint: clonePoint2(viewState.anchorCanvas ?? [0.5, 0.5]),
};
}
/**
* Builds the capability-based Planar projection snapshot for a viewport-like
* object or an explicit view-state request.
*/
export function getPlanarProjectionSnapshot(
request: PlanarProjectionRequest
): PlanarProjectionSnapshot | undefined {
const { viewport } = request;
const viewState = normalizePlanarViewState(
request.viewState ?? viewport.getViewState?.() ?? {}
);
const resolvedView =
request.resolvedView ??
(request.viewState && request.resolveViewState
? request.resolveViewState(viewState)
: viewport.getResolvedView?.({
frameOfReferenceUID: request.frameOfReferenceUID,
sliceIndex: request.sliceIndex,
}));
const canvasWidth =
request.canvasWidth ??
resolvedView?.state.canvasWidth ??
viewport.element?.clientWidth ??
1;
const canvasHeight =
request.canvasHeight ??
resolvedView?.state.canvasHeight ??
viewport.element?.clientHeight ??
1;
const displayArea =
request.displayArea ?? viewport.getDisplayArea?.() ?? viewState.displayArea;
const scaleVector = resolvedView?.scale ?? clonePlanarScale(viewState.scale);
const zoom = resolvedView?.zoom ?? getPlanarScaleZoom(viewState.scale);
const rawPan =
resolvedView?.pan ??
getPlanarProjectionFallbackPan(viewState, canvasWidth, canvasHeight);
const rendererCamera = resolvedView?.toICamera();
const frameOfReferenceUID =
request.frameOfReferenceUID ??
resolvedView?.getFrameOfReferenceUID() ??
viewport.getFrameOfReferenceUID?.();
return {
kind: PLANAR_PROJECTION_ID,
adapterId: PLANAR_PROJECTION_ID,
canvasHeight,
canvasWidth,
dataId: request.dataId,
displayArea: cloneDisplayArea(displayArea),
frameOfReferenceUID,
presentation: {
displayArea: cloneDisplayArea(displayArea),
flipHorizontal: viewState.flipHorizontal === true,
flipVertical: viewState.flipVertical === true,
pan: clonePoint2(rawPan),
position: getProjectionPosition(viewState, rendererCamera),
rawPan: clonePoint2(rawPan),
rotation:
resolvedView?.rotation ?? normalizePlanarRotation(viewState.rotation),
scale: getProjectionScale({
displayArea,
scaleMode: viewState.scaleMode,
zoom,
}),
scaleVector: clonePoint2(scaleVector),
zoom,
},
rendererCamera,
resolveViewState: request.resolveViewState,
resolvedView,
spaces: {
canvas: true,
image: true,
renderer: Boolean(rendererCamera),
world: Boolean(resolvedView),
},
transforms: resolvedView
? {
canvasToWorld: (point) => resolvedView.canvasToWorld(point),
worldToCanvas: (point) => resolvedView.worldToCanvas(point),
}
: undefined,
viewState,
viewportType: viewport.type,
};
}
/**
* Reads the legacy uniform zoom value from a Planar projection snapshot.
*/
export function getPlanarProjectionZoom(
snapshot: PlanarProjectionSnapshot
): number {
return snapshot.presentation.zoom ?? 1;
}
/**
* Reads the native two-axis Planar scale from a projection snapshot.
*/
export function getPlanarProjectionScale(
snapshot: PlanarProjectionSnapshot
): Point2 {
return clonePoint2(snapshot.presentation.scaleVector);
}
/**
* Reads raw canvas-space pan from a projection snapshot.
*/
export function getPlanarProjectionPan(
snapshot: PlanarProjectionSnapshot
): Point2 {
return clonePoint2(snapshot.presentation.rawPan);
}
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