Add blurhash support

src/components/blurhash/Blurhash.vue

@@ -0,0 +1,66 @@
+<template>
+  <canvas
+    ref="canvas"
+    class="blurhash"
+  />
+</template>
+
+<script>
+import { decode } from "blurhash";
+
+export default {
+  name: 'Blurhash',
+  props: {
+    hash: {
+      type: String,
+      required: true,
+    },
+    width: {
+      type: Number,
+      required: true,
+    },
+    height: {
+      type: Number,
+      required: true,
+    },
+    punch: {
+      type: Number,
+      default: null,
+    },
+  },
+  data() {
+    return {
+      canvas: null,
+      ctx: null,
+    };
+  },
+  mounted() {
+    this.canvas = this.$refs.canvas;
+    this.ctx = this.canvas.getContext('2d');
+    this.canvas.width = 1024;
+    this.canvas.height = 512;
+    this.draw();
+  },
+  methods: {
+    draw() {
+      const pixels = decode(this.hash, this.width, this.height, this.punch);
+      const imageData = this.ctx.createImageData(this.width, this.height);
+      imageData.data.set(pixels);
+      this.ctx.putImageData(imageData, 0, 0);
+      fetch("/static/blurhash-overlay.png")
+        .then((response) => response.blob())
+        .then((blob) => {
+          const img = new Image();
+          img.src = URL.createObjectURL(blob);
+          img.onload = () => {
+            this.ctx.drawImage(img, 0, 0, this.width, this.height);
+          };
+        });
+    },
+  }
+}
+</script>
+
+<style scoped>
+
+</style>