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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 | import {
IImage,
CPUFallbackEnabledElement,
ViewportInputOptions,
IVolume,
} from '../types';
import getDefaultViewport from '../RenderingEngine/helpers/cpuFallback/rendering/getDefaultViewport';
import calculateTransform from '../RenderingEngine/helpers/cpuFallback/rendering/calculateTransform';
import drawImageSync from '../RenderingEngine/helpers/cpuFallback/drawImageSync';
import type { CanvasLoadPosition } from './loadImageToCanvas';
/**
* Renders a cornerstone image object to a canvas.
* Note: this does not load the image but only takes care of the rendering pipeline
*
* @param image - Cornerstone image object
* @param canvas - Canvas element to render to
*/
export default function renderToCanvasCPU(
canvas: HTMLCanvasElement,
imageOrVolume: IImage | IVolume,
modality?: string,
_renderingEngineId?: string,
_viewportOptions?: ViewportInputOptions
): Promise<CanvasLoadPosition> {
const volume = imageOrVolume as IVolume;
if (volume.volumeId) {
throw new Error('Unsupported volume rendering for CPU');
}
const image = imageOrVolume as IImage;
const viewport = getDefaultViewport(canvas, image, modality);
const enabledElement: CPUFallbackEnabledElement = {
canvas,
viewport,
image,
renderingTools: {},
};
enabledElement.transform = calculateTransform(enabledElement);
const invalidated = true;
return new Promise((resolve, reject) => {
drawImageSync(enabledElement, invalidated);
resolve(null);
});
}
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