144 lines
3.5 KiB
Vue
144 lines
3.5 KiB
Vue
<template>
|
|
<div :class="[$style.root, { [$style.cover]: cover }]" :title="title ?? ''">
|
|
<TransitionGroup
|
|
:duration="defaultStore.state.animation && props.transition?.duration || undefined"
|
|
:enter-active-class="defaultStore.state.animation && props.transition?.enterActiveClass || undefined"
|
|
:leave-active-class="defaultStore.state.animation && (props.transition?.leaveActiveClass ?? $style['transition_leaveActive']) || undefined"
|
|
:enter-from-class="defaultStore.state.animation && props.transition?.enterFromClass || undefined"
|
|
:leave-to-class="defaultStore.state.animation && props.transition?.leaveToClass || undefined"
|
|
:enter-to-class="defaultStore.state.animation && props.transition?.enterToClass || undefined"
|
|
:leave-from-class="defaultStore.state.animation && props.transition?.leaveFromClass || undefined"
|
|
>
|
|
<canvas v-show="hide" key="canvas" ref="canvas" :class="$style.canvas" :width="canvasWidth" :height="canvasHeight" :title="title ?? undefined"/>
|
|
<img v-show="!hide" key="img" :height="height" :width="width" :class="$style.img" :src="src ?? undefined" :title="title ?? undefined" :alt="alt ?? undefined" loading="eager" @load="onLoad"/>
|
|
</TransitionGroup>
|
|
</div>
|
|
</template>
|
|
<script lang="ts">
|
|
import DrawBlurhash from '@/workers/draw-blurhash?worker';
|
|
|
|
const worker = new DrawBlurhash();
|
|
</script>
|
|
<script lang="ts" setup>
|
|
import { computed, onMounted, shallowRef, useCssModule, watch } from 'vue';
|
|
import { v4 as uuid } from 'uuid';
|
|
import { defaultStore } from '@/store';
|
|
const $style = useCssModule();
|
|
|
|
const props = withDefaults(defineProps<{
|
|
transition?: {
|
|
duration?: number | { enter: number; leave: number; };
|
|
enterActiveClass?: string;
|
|
leaveActiveClass?: string;
|
|
enterFromClass?: string;
|
|
leaveToClass?: string;
|
|
enterToClass?: string;
|
|
leaveFromClass?: string;
|
|
} | null;
|
|
src?: string | null;
|
|
hash?: string;
|
|
alt?: string | null;
|
|
title?: string | null;
|
|
height?: number;
|
|
width?: number;
|
|
cover?: boolean;
|
|
forceBlurhash?: boolean;
|
|
}>(), {
|
|
transition: null,
|
|
src: null,
|
|
alt: '',
|
|
title: null,
|
|
height: 64,
|
|
width: 64,
|
|
cover: true,
|
|
forceBlurhash: false,
|
|
});
|
|
|
|
const canvas = shallowRef<HTMLCanvasElement>();
|
|
let loaded = $ref(false);
|
|
let canvasWidth = $ref(props.width);
|
|
let canvasHeight = $ref(props.height);
|
|
let currentDrawId = $ref<string>();
|
|
const hide = computed(() => !loaded || props.forceBlurhash);
|
|
|
|
function onLoad() {
|
|
loaded = true;
|
|
}
|
|
|
|
watch([() => props.width, () => props.height], () => {
|
|
const ratio = props.width / props.height;
|
|
if (ratio > 1) {
|
|
canvasWidth = Math.round(64 * ratio);
|
|
canvasHeight = 64;
|
|
} else {
|
|
canvasWidth = 64;
|
|
canvasHeight = Math.round(64 / ratio);
|
|
}
|
|
}, {
|
|
immediate: true,
|
|
});
|
|
|
|
function draw() {
|
|
if (props.hash == null) return;
|
|
currentDrawId = uuid();
|
|
worker.postMessage({
|
|
id: currentDrawId,
|
|
hash: props.hash,
|
|
width: canvasWidth,
|
|
height: canvasHeight,
|
|
});
|
|
}
|
|
|
|
worker.addEventListener('message', event => {
|
|
if (!canvas.value) return;
|
|
if (event.data.id !== currentDrawId) return;
|
|
const ctx = canvas.value.getContext('2d');
|
|
if (!ctx) return;
|
|
const bitmap = event.data.bitmap as ImageBitmap;
|
|
ctx.drawImage(bitmap, 0, 0, canvasWidth, canvasHeight);
|
|
});
|
|
|
|
watch(() => props.hash, () => {
|
|
draw();
|
|
});
|
|
|
|
onMounted(() => {
|
|
draw();
|
|
});
|
|
</script>
|
|
|
|
<style lang="scss" module>
|
|
.transition_leaveActive {
|
|
position: absolute;
|
|
top: 0;
|
|
left: 0;
|
|
}
|
|
.root {
|
|
position: relative;
|
|
width: 100%;
|
|
height: 100%;
|
|
|
|
&.cover {
|
|
> .canvas,
|
|
> .img {
|
|
object-fit: cover;
|
|
}
|
|
}
|
|
}
|
|
|
|
.canvas,
|
|
.img {
|
|
display: block;
|
|
width: 100%;
|
|
height: 100%;
|
|
}
|
|
|
|
.canvas {
|
|
object-fit: contain;
|
|
}
|
|
|
|
.img {
|
|
object-fit: contain;
|
|
}
|
|
</style>
|