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scripts.js
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69 lines (60 loc) · 1.91 KB
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const video = document.querySelector('.player');
const canvas = document.querySelector('.photo');
const ctx = canvas.getContext('2d');
const strip = document.querySelector('.strip');
const snap = document.querySelector('.snap');
function getVideo() {
navigator.mediaDevices.getUserMedia({ video: true, audio: false })
.then(localMediaStream => {
console.log(localMediaStream);
video.src = window.URL.createObjectURL(localMediaStream);
video.play();
})
.catch(err => {
console.error('eita', err);
})
}
function paintToCanvas() {
const width = video.videoWidth;
const height = video.videoHeight;
canvas.width = width;
canvas.height = height;
// console.log(width, height);
return setInterval(() => {
ctx.drawImage(video, 0, 0, width, height);
let pixels = ctx.getImageData(0 ,0 , width, height);
// console.log(pixels);
// pixels = redEffect(pixels);
pixels = rgbSplit(pixels);
ctx.putImageData(pixels, 0, 0);
}, 16)
}
function takePhoto() {
snap.currentTime = 0;
snap.play();
const data = canvas.toDataURL('image/jpeg');
const link = document.createElement('a');
link.href = data;
link.setAttribute('download', 'handsome');
link.textContent = 'Download Image';
link.innerHTML = `<img src="${data}">`;
strip.insertBefore(link, strip.firsChild);
}
function redEffect(pixels) {
for(let i = 0; i < pixels.data.length; i+=4) {
pixels.data[i + 0] = pixels.data[i + 0] + 200; // RED
pixels.data[i + 1] = pixels.data[i + 1] - 50; // GREEN
pixels.data[i + 2] = pixels.data[i + 2] * 0.5; // Blue
}
return pixels;
}
function rgbSplit(pixels) {
for(let i = 0; i < pixels.data.length; i+=4) {
pixels.data[i - 150] = pixels.data[i + 0]; // RED
pixels.data[i + 500] = pixels.data[i + 1]; // GREEN
pixels.data[i - 550] = pixels.data[i + 2]; // Blue
}
return pixels;
}
getVideo();
video.addEventListener('canplay', paintToCanvas);