38 lines
947 B
TypeScript
38 lines
947 B
TypeScript
import { GlCanvas, GlCanvasOptions } from './GlCanvas';
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export class FallbackCanvas extends GlCanvas {
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get type() {
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return 'legacy';
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}
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context: CanvasRenderingContext2D;
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constructor(options: GlCanvasOptions) {
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super(options);
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}
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/**
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* We need to override the following methods in order to avoid default behaviour,
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* since these methods in GlCanvas touch some webGL properties that we cannot really
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* touch in this class.
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*/
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destroy() { }
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protected initContext() {
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this.context = this.canvas.getContext('2d', {desynchronized: true});
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}
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protected initWebgl() { }
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drawVideoFrame(video: HTMLVideoElement) {
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this.context.drawImage(video, 0, 0, this.context.canvas.width, this.context.canvas.height);
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}
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getImageData() {
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this.frameBuffer = this.context.getImageData(0,0,this.context.canvas.width,this.context.canvas.height).data as any as Uint8Array;
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return this.frameBuffer;
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}
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}
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