68 lines
1.6 KiB
TypeScript
68 lines
1.6 KiB
TypeScript
import { RenderParams, histIndex, imageIndex } from "./0-utility.js";
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import {
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camera,
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transform1Weight,
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transform2Weight,
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transform3Weight,
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} from "./2a-baseline.js";
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import {
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TransformPost,
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transform1Post,
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transform2Post,
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transform3Post,
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transformAllPost,
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} from "./2b-post.js";
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import { RendererFinal, transformFinal } from "./2c-final.js";
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export class RendererHistogram extends RendererFinal {
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protected histogram: number[] = [];
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constructor(
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size: number,
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transforms: [number, TransformPost][],
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final: TransformPost
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) {
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super(size, transforms, final);
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for (var i = 0; i < this.size * this.size; i++) {
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this.histogram.push(0);
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}
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}
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plot(x: number, y: number): void {
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[x, y] = this.final.apply(x, y);
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const [pixelX, pixelY] = camera(x, y, this.size);
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if (
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pixelX < 0 ||
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pixelY >= this.size ||
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pixelY < 0 ||
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pixelY >= this.size
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) {
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return;
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}
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const hIndex = histIndex(pixelX, pixelY, this.size);
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this.histogram[hIndex] += 1;
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}
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render(image: ImageData): void {
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for (var x = 0; x < this.size; x++) {
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for (var y = 0; y < this.size; y++) {
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const hIndex = histIndex(x, y, this.size);
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const iIndex = imageIndex(x, y, this.size);
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image.data[iIndex + 0] = 0;
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image.data[iIndex + 1] = 0;
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image.data[iIndex + 2] = 0;
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image.data[iIndex + 3] = (this.histogram[hIndex] > 0 ? 1 : 0) * 0xff;
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}
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}
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}
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}
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export const paramsBinary: RenderParams = {
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quality: 1,
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renderer: (size) =>
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new RendererHistogram(size, transformAllPost, transformFinal),
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};
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