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How to use imgctx method in wpt

Best JavaScript code snippet using wpt

index.ts

1import { chunk, clone, sum } from 'lodash-es';2import { v4 } from 'uuid';3import * as fnv1a from '@sindresorhus/fnv1a';4const canvas = document.getElementById('canvas');5const ctx = (canvas as HTMLCanvasElement).getContext('2d');6const imgCanvas = document.getElementById('imgcanvas');7let imgCtx = (imgCanvas as HTMLCanvasElement).getContext('2d');8const loadImage = async (src: string) => {9    const imgCanvas = document.getElementById('imgcanvas');10    imgCtx = (imgCanvas as HTMLCanvasElement).getContext('2d');11    imgCtx.imageSmoothingEnabled = false;12    await new Promise((resolve, reject) => {13        try {14            const image = new Image();15            image.onload = () => {16                imgCtx.canvas.height = image.naturalHeight;17                imgCtx.canvas.width = image.naturalWidth;18                imgCtx.setTransform(1,0,0,1,0,0);19                imgCtx.drawImage(image, 0, 0, image.naturalWidth, image.naturalHeight);20                resolve(true);21            };22            image.onerror = (e) => { reject(e); }23            image.src = src;24        } catch (err) {25            reject(err);26        }27    })28    return imgCtx;29}30const percent = 0.2;31const draw = (ctx: CanvasRenderingContext2D, item: any, col: number, row: number) => {32    ctx.fillStyle = `rgba(${ item[0]},${  item[1] },${  item[2]}, 1.0`;33    ctx.fillRect(col, row, 1, 1);34}35function swap(items:any, leftIndex: any, rightIndex: any){36    let temp = items[leftIndex];37    draw(ctx, items[leftIndex], leftIndex  % ctx.canvas.width, Math.floor(leftIndex /  ctx.canvas.width))38    draw(ctx, items[rightIndex], rightIndex  % ctx.canvas.width, Math.floor(rightIndex /  ctx.canvas.width))39    items[leftIndex] = items[rightIndex];40    items[rightIndex] = temp;41}42const compIndex = (index: number, items: any) => sum(items[index]);43function partition(items: any, left: any, right: any) {44    const pivotIndex = Math.floor((right + left) / 2);45    let pivot = compIndex(pivotIndex, items);46    let i = left; //left pointer47    let j = right; //right pointer48    while (i <= j) {49        while (compIndex(i, items) < pivot) { i++; }50        while (compIndex(j, items) > pivot) { j--; }51        if (i <= j) { swap(items, i, j); i++; j--; }52    }53    return i;54}55async function quickSort(items: any, left: any, right:any, intervalId: string) {56    var index: number;57    if (items.length > 1) {58        if (intervalId !== currentId) { return items; }59        index = partition(items, left, right);60        if (left < index - 1) { requestAnimationFrame(() => quickSort(items, left, index - 1, intervalId)); }61        if (index < right) { requestAnimationFrame(() => quickSort(items, index, right, intervalId)); }62    }63    return items;64}65let currentId: string;66const main = async () => {67    const video = document.createElement('video');68    video.src = './bird.webm';69    video.muted = true;70    video.addEventListener('loadeddata', () => {71        video.oncanplay = function() {72            video.play();73        };74    })75    let interval: NodeJS.Timer;76    // video.addEventListener('play', async () => {77    //     ctx.canvas.width = (video as HTMLVideoElement).videoWidth;78    //     ctx.canvas.height = (video as HTMLVideoElement).videoHeight;79    //     ctx.imageSmoothingEnabled = false;80    //     ctx.setTransform(1,0,0,1,0,0);81    //     imgCtx.canvas.width = (video as HTMLVideoElement).videoWidth;82    //     imgCtx.canvas.height = (video as HTMLVideoElement).videoHeight;83    //     imgCtx.imageSmoothingEnabled = false;84    //     imgCtx.setTransform(1,0,0,1,0,0);85    //     clearInterval(interval);86    //     interval = setInterval(async () => {87    //         let id = v4();88    //         currentId = id;89    //         imgCtx.drawImage(video as HTMLVideoElement, 0, 0, imgCtx.canvas.width, imgCtx.canvas.height);90    //         const imageData = imgCtx.getImageData(0,0, imgCtx.canvas.width, imgCtx.canvas.height).data;91    //         let pixelData = chunk(imageData as any, 4);92    //         pixelData = await quickSort(pixelData, 0, pixelData.length - 1, id);93    //     }, 100);94    // }, false);95    console.log('yo')96    video.addEventListener('play', () => {97        ctx.canvas.width = (video as HTMLVideoElement).videoWidth;98        ctx.canvas.height = (video as HTMLVideoElement).videoHeight;99        ctx.imageSmoothingEnabled = false;100        ctx.setTransform(1,0,0,1,0,0);101        imgCtx.canvas.width = (video as HTMLVideoElement).videoWidth;102        imgCtx.canvas.height = (video as HTMLVideoElement).videoHeight;103        imgCtx.imageSmoothingEnabled = false;104        imgCtx.setTransform(1,0,0,1,0,0);105        clearInterval(interval);106        const bloomFilters = {107            r: new Map(),108            g: new Map(),109            b: new Map(),110        }111        interval = setInterval(async () => {112            imgCtx.drawImage(video as HTMLVideoElement, 0, 0, imgCtx.canvas.width, imgCtx.canvas.height);113            const imageData = imgCtx.getImageData(0,0, imgCtx.canvas.width, imgCtx.canvas.height).data;114            let pixeldata = chunk(imageData, 4);115            116            const len = Math.floor(pixeldata.length );117            const set = (map ,hash, value) => {118                if (map.has(hash)) {119                    // map.set(hash, Math.floor(map.get(hash)  +value) / 2));120                    // map.set(hash, Math.floor((map.get(hash)  +value) / 2));121                    map.set(hash, Math.max(map.get(hash), value));122                } else {123                    map.set(hash, value);124                }125            };126            pixeldata.forEach((data, i) => {127                set(bloomFilters.r, fnv1a(i.toString()) % len , data[0])128                set(bloomFilters.g, fnv1a(i.toString()) % len , data[1])129                set(bloomFilters.b, fnv1a(i.toString()) % len , data[2])130            });131            // const multiplier = Math.floor(Math.random() * 100)132            const multiplier = 1;133            pixeldata.forEach((data, i) => {134                draw(135                    ctx,136                    [137                        bloomFilters.r.get(fnv1a(data[0].toString()) % len) * multiplier % 255,138                        bloomFilters.g.get(fnv1a(data[1].toString()) % len) * multiplier % 255,139                        bloomFilters.b.get(fnv1a(data[2].toString()) % len) * multiplier % 255,140                        // bloomFilters.r[fnv1a(i.toString()) % len],141                        // bloomFilters.g[fnv1a(i.toString()) % len],142                        // bloomFilters.b[fnv1a(i.toString()) % len],143                        data[3]144                    ],145                    i % ctx.canvas.width,146                    Math.floor(i / ctx.canvas.width)147                );148            });149        },5);150    })151};...

detection-on-worker.https.worker.js

Source: detection-on-worker.https.worker.js

1importScripts("/resources/testharness.js");2importScripts("resources/shapedetection-helpers.js");3'use strict';4// These tests verify that a Detector's detect() works on an5// ImageBitmap on workers.6const imageBitmapTests =7    [8      {9        createDetector: () => { return new FaceDetector(); },10        mockTestName: "FaceDetectionTest",11        resultSize: 3, // Number of faces12        detectorType: "Face"13      },14      {15        createDetector: () => { return new BarcodeDetector(); },16        mockTestName: "BarcodeDetectionTest",17        resultSize: 2, // Number of barcodes18        detectorType: "Barcode"19      }20    ];21for (let imageBitmapTest of imageBitmapTests) {22  // ImageBitmap is of transferable type and can be sent to and23  // tested on worker.24  detection_test(imageBitmapTest.mockTestName, async (t, detectionTest) => {25    const img = createTestImage();26    const theImageBitmap = await createImageBitmap(img);27    const detector = imageBitmapTest.createDetector();28    const detectionResult = await detector.detect(theImageBitmap);29    assert_equals(detectionResult.length, imageBitmapTest.resultSize,30      `Number of ${imageBitmapTest.detectorType}`);31  }, `${imageBitmapTest.detectorType} Detector detect(ImageBitmap) on worker`);32}33function createTestImage() {34  const image = new OffscreenCanvas(100, 50);35  const imgctx = image.getContext('2d');36  imgctx.fillStyle = "#F00";37  imgctx.fillRect(0, 0, 2, 2);38  imgctx.fillStyle = "#0F0";39  imgctx.fillRect(0, 0, 1, 1);40  return image;41}...

drawImage.ts

Source: drawImage.ts

1import { Vec2 } from "../lib/physics";2export type ImgCtx = {3    img: CanvasImageSource,4    x: number,5    y: number,6    offset: Vec2,7    w: number,8    h: number,9    flipH: boolean10    rotate: number11}12export function drawImage(cctx: CanvasRenderingContext2D, imgCtx: ImgCtx) {13    cctx.save();14    // move to the center of the canvas15    cctx.translate(imgCtx.x, imgCtx.y)16    // rotate the canvas to the specified degrees17    cctx.rotate(imgCtx.rotate * Math.PI / 180);18    cctx.translate(-imgCtx.x, -imgCtx.y)19    // draw the image20    if (imgCtx.flipH) drawImageFlipHorizontally(cctx, imgCtx.img, imgCtx.x - imgCtx.offset.x, imgCtx.y + imgCtx.offset.y, imgCtx.w, imgCtx.h)21    else cctx.drawImage(imgCtx.img, imgCtx.x + imgCtx.offset.x, imgCtx.y + imgCtx.offset.y, imgCtx.w, imgCtx.h)22    cctx.restore();23}24export function drawImageFlipHorizontally(cctx: CanvasRenderingContext2D, img: CanvasImageSource, x: number, y: number, w: number, h: number) {25    // move to x + img's width26    cctx.translate(x + Number(img.width), y);27    // scaleX by -1; this "trick" flips horizontally28    cctx.scale(-1, 1);29    // draw the img30    // no need for x,y since we've already translated31    cctx.drawImage(img, 0, 0, w, h);32    // always clean up -- reset transformations to default33    cctx.setTransform(1, 0, 0, 1, 0, 0);...

Using AI Code Generation

1var imgctx = require('imgctx');2image.save('logo.png', 'png');3image.save('logo.jpg', 'jpg');4image.save('logo.gif', 'gif');5image.save('logo.bmp', 'bmp');6image.save('logo.tiff', 'tiff');7var imgctx = require('imgctx');8image.save('logo.png', 'png');9image.save('logo.jpg', 'jpg');10image.save('logo.gif', 'gif');11image.save('logo.bmp', 'bmp');12image.save('logo.tiff', 'tiff');13var imgctx = require('imgctx');14image.save('logo.png', 'png');15image.save('logo.jpg', 'jpg');16image.save('logo.gif', 'gif');17image.save('logo.bmp', 'bmp');18image.save('logo.tiff', 'tiff');19var imgctx = require('imgctx');20image.save('logo.png', 'png');21image.save('logo.jpg', 'jpg');22image.save('logo.gif', 'gif');23image.save('logo.bmp', 'bmp');24image.save('logo.tiff', 'tiff');25var imgctx = require('imgctx');26image.save('logo.png', 'png');27image.save('logo.jpg', 'jpg');28image.save('logo.gif', 'gif');29image.save('logo.bmp', 'bmp');30image.save('logo.tiff', 'tiff');31var imgctx = require('imgctx');32image.save('logo.png', 'png');33image.save('logo.jpg', 'jpg');34image.save('logo.gif', 'gif');

Using AI Code Generation

1});2}, function(err) {3});4}, function(err) {5}, true);6}, function(err) {7}, false);8}, function(err) {9}, false, true);10}, function(err) {11}, false, false);12}, function(err) {13}, false, false, true);

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