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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 | 71x 71x 71x 71x 71x 71x | import vtkImageData from '@kitware/vtk.js/Common/DataModel/ImageData';
import { IImage, PixelDataTypedArray } from '../types';
function updateVTKImageDataWithCornerstoneImage(
sourceImageData: vtkImageData,
image: IImage
) {
const pixelData = image.getPixelData();
Iif (!sourceImageData.getPointData) {
// This happens for a CanvasActor, that doesn't have the getPointData
return;
}
const scalarData = sourceImageData
.getPointData()
.getScalars()
.getData() as PixelDataTypedArray;
// if the color image is loaded with CPU previously, it loads it
// with RGBA, and here we need to remove the A channel from the
// pixel data.
Iif (image.color && image.rgba) {
const newPixelData = new Uint8Array(image.columns * image.rows * 3);
for (let i = 0; i < image.columns * image.rows; i++) {
newPixelData[i * 3] = pixelData[i * 4];
newPixelData[i * 3 + 1] = pixelData[i * 4 + 1];
newPixelData[i * 3 + 2] = pixelData[i * 4 + 2];
}
// modify the image object to have the correct pixel data for later
// use.
image.rgba = false;
image.getPixelData = () => newPixelData;
scalarData.set(newPixelData);
} else {
scalarData.set(pixelData);
}
// Trigger modified on the VTK Object so the texture is updated
// TODO: evaluate directly changing things with texSubImage3D later
sourceImageData.modified();
}
export { updateVTKImageDataWithCornerstoneImage };
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