day 19

Charlie · Charlie · commit a00e71e10308 · 2017-01-02T20:58:11.000-06:00
diff --git a/19 - Webcam Fun/scripts.js b/19 - Webcam Fun/scripts.js
@@ -3,3 +3,62 @@ 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 => {
+      video.src = window.URL.createObjectURL(localMediaStream);
+      video.play();
+    })
+    .catch(err => console.log('fuck it!'));
+}
+
+function paintToCanvas() {
+  const { videoHeight: height, videoWidth: width} = video;
+  canvas.width = width;
+  canvas.height = height;
+  return setInterval(() => {
+    ctx.drawImage(video, 0, 0, width, height);
+    let pixels = ctx.getImageData(0, 0, width, height);
+    // pixels = redEffect(pixels);
+    pixels = rgbSplit(pixels);
+    ctx.putImageData(pixels, 0, 0);
+
+  }, 16);
+}
+
+function takePhoto() {
+  // play a sound
+  snap.currentTime = 0;
+  snap.play();
+
+  // take data out of the canvas
+  const data = canvas.toDataURL('image/jpeg');
+  const link = document.createElement('a');
+  link.href = data;
+  link.setAttribute('download', 'handsome');
+  link.innerHTML = `<img src="${data}"/>`;
+  strip.insertBefore(link, strip.firstChild);
+}
+
+function redEffect(pixels) {
+  for (let i = 0; i < pixels.data.length; i += 4) {
+    pixels.data[i + 0] = pixels.data[i + 0] + 100;
+    pixels.data[i + 1] = pixels.data[i + 1] - 50;
+    pixels.data[i + 2] = pixels.data[i + 2] * 0.5;
+  }
+  return pixels;
+}
+
+function rgbSplit(pixels) {
+  for (let i = 0; i < pixels.data.length; i += 4) {
+    pixels.data[i - 150] = pixels.data[i + 0];
+    pixels.data[i + 100] = pixels.data[i + 1];
+    pixels.data[i - 150] = pixels.data[i + 2];
+  }
+  return pixels;
+}
+
+getVideo();
+
+video.addEventListener('canplay', paintToCanvas);
