Bh worker off

packages/frontend/src/components/MkGalleryPostPreview.vue

@@ -5,12 +5,9 @@
 			<ImgWithBlurhash
 				class="img layered"
 				:transition="safe ? null : {
-					enterActiveClass: $style.transition_toggle_enterActive,
+					duration: 500,
 					leaveActiveClass: $style.transition_toggle_leaveActive,
-					enterFromClass: $style.transition_toggle_enterFrom,
 					leaveToClass: $style.transition_toggle_leaveTo,
-					enterToClass: $style.transition_toggle_enterTo,
-					leaveFromClass: $style.transition_toggle_leaveFrom,
 				}"
 				:src="post.files[0].thumbnailUrl"
 				:hash="post.files[0].blurhash"
@@ -53,24 +50,16 @@ function leaveHover(): void {
 </script>
 
 <style lang="scss" module>
-.transition_toggle_enterActive,
 .transition_toggle_leaveActive {
-	transition: opacity 0.5s;
+	transition: opacity .5s;
 	position: absolute;
 	top: 0;
 	left: 0;
 }
 
-.transition_toggle_enterFrom,
 .transition_toggle_leaveTo {
 	opacity: 0;
 }
-
-.transition_toggle_enterTo,
-.transition_toggle_leaveFrom {
-	transition: none;
-	opacity: 1;
-}
 </style>
 
 <style lang="scss" scoped>

packages/frontend/src/components/MkImgWithBlurhash.vue

@@ -1,30 +1,32 @@
 <template>
 <div :class="[$style.root, { [$style.cover]: cover }]" :title="title ?? ''">
-	<img v-if="!loaded && src && !forceBlurhash" :class="$style.loader" :src="src" @load="onLoad"/>
-	<Transition
-		mode="in-out"
-		:enter-active-class="defaultStore.state.animation && (props.transition?.enterActiveClass ?? $style['transition_toggle_enterActive']) || undefined"
-		:leave-active-class="defaultStore.state.animation && (props.transition?.leaveActiveClass ?? $style['transition_toggle_leaveActive']) || undefined"
+	<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 ?? $style['transition_toggle_enterTo']) || undefined"
-		:leave-from-class="defaultStore.state.animation && (props.transition?.leaveFromClass ?? $style['transition_toggle_leaveFrom']) || undefined"
+		:enter-to-class="defaultStore.state.animation && props.transition?.enterToClass || undefined"
+		:leave-from-class="defaultStore.state.animation && props.transition?.leaveFromClass || undefined"
 	>
-		<canvas v-if="!loaded || forceBlurhash" ref="canvas" :class="$style.canvas" :width="width" :height="height" :title="title ?? undefined"/>
-		<img v-else :class="$style.img" :src="src ?? undefined" :title="title ?? undefined" :alt="alt ?? undefined"/>
-	</Transition>
+		<canvas v-show="hide" key="canvas" ref="canvas" :class="$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" setup>
-import { onMounted, shallowRef, useCssModule, watch } from 'vue';
-import { decode } from 'blurhash';
+import { computed, onMounted, onUnmounted, shallowRef, useCssModule, watch } from 'vue';
 import { defaultStore } from '@/store';
+import DrawBlurhash from '@/workers/draw-blurhash?worker';
+
+const worker = new DrawBlurhash();
 
 const $style = useCssModule();
 
 const props = withDefaults(defineProps<{
 	transition?: {
+		duration?: number | { enter: number; leave: number; };
 		enterActiveClass?: string;
 		leaveActiveClass?: string;
 		enterFromClass?: string;
@@ -53,8 +55,9 @@ const props = withDefaults(defineProps<{
 
 const canvas = shallowRef<HTMLCanvasElement>();
 let loaded = $ref(false);
-let width = $ref(props.width);
-let height = $ref(props.height);
+let canvasWidth = $ref(props.width);
+let canvasHeight = $ref(props.height);
+const hide = computed(() => !loaded || props.forceBlurhash);
 
 function onLoad() {
 	loaded = true;
@@ -63,55 +66,55 @@ function onLoad() {
 watch([() => props.width, () => props.height], () => {
 	const ratio = props.width / props.height;
 	if (ratio > 1) {
-		width = Math.round(64 * ratio);
-		height = 64;
+		canvasWidth = Math.round(64 * ratio);
+		canvasHeight = 64;
 	} else {
-		width = 64;
-		height = Math.round(64 / ratio);
+		canvasWidth = 64;
+		canvasHeight = Math.round(64 / ratio);
 	}
 }, {
 	immediate: true,
 });
 
-function draw() {
-	if (props.hash == null || !canvas.value) return;
-	const pixels = decode(props.hash, width, height);
-	const ctx = canvas.value.getContext('2d');
-	const imageData = ctx!.createImageData(width, height);
-	imageData.data.set(pixels);
-	ctx!.putImageData(imageData, 0, 0);
+function draw(offscreen: OffscreenCanvas | null = null) {
+	if (props.hash == null) return;
+	worker.postMessage({
+		hash: props.hash,
+		width: canvasWidth,
+		height: canvasHeight,
+		canvas: offscreen,
+	}, offscreen ? [offscreen] : []);
 }
 
-watch([() => props.hash, canvas], () => {
+worker.addEventListener('message', event => {
+	if (!canvas.value) return;
+	const ctx = canvas.value.getContext('2d');
+	if (!ctx) return;
+	const bitmap = event.data as ImageBitmap;
+	ctx.drawImage(bitmap, 0, 0, canvasWidth, canvasHeight);
+});
+
+watch(() => props.hash, () => {
 	draw();
 });
 
 onMounted(() => {
-	draw();
+	if (canvas.value) {
+		draw(canvas.value.transferControlToOffscreen());
+	}
+});
+
+onUnmounted(() => {
+	worker.terminate();
 });
 </script>
 
 <style lang="scss" module>
-.transition_toggle_enterActive,
-.transition_toggle_leaveActive {
+.transition_leaveActive {
 	position: absolute;
 	top: 0;
 	left: 0;
 }
-
-.transition_toggle_enterTo,
-.transition_toggle_leaveFrom {
-	opacity: 0;
-}
-
-.loader {
-	position: absolute;
-	top: 0;
-	left: 0;
-	width: 0;
-	height: 0;
-}
-
 .root {
 	position: relative;
 	width: 100%;

packages/frontend/src/components/MkMediaImage.vue

@@ -1,29 +1,43 @@
 <template>
+<!--
 <div v-if="hide" :class="$style.hidden" @click="hide = false">
 	<ImgWithBlurhash style="filter: brightness(0.5);" :hash="image.blurhash" :title="image.comment" :alt="image.comment" :width="image.properties.width" :height="image.properties.height" :force-blurhash="defaultStore.state.enableDataSaverMode"/>
-	<div :class="$style.hiddenText">
-		<div :class="$style.hiddenTextWrapper">
-			<b v-if="image.isSensitive" style="display: block;"><i class="ti ti-alert-triangle"></i> {{ i18n.ts.sensitive }}{{ defaultStore.state.enableDataSaverMode ? ` (${i18n.ts.image}${image.size ? ' ' + bytes(image.size) : ''})` : '' }}</b>
-			<b v-else style="display: block;"><i class="ti ti-photo"></i> {{ defaultStore.state.enableDataSaverMode && image.size ? bytes(image.size) : i18n.ts.image }}</b>
-			<span style="display: block;">{{ i18n.ts.clickToShow }}</span>
-		</div>
-	</div>
-</div>
-<div v-else :class="$style.visible" :style="darkMode ? '--c: rgb(255 255 255 / 2%);' : '--c: rgb(0 0 0 / 2%);'">
+</div>-->
+<div :class="hide ? $style.hidden : $style.visible" :style="darkMode ? '--c: rgb(255 255 255 / 2%);' : '--c: rgb(0 0 0 / 2%);'" @click="onclick">
 	<a
 		:class="$style.imageContainer"
 		:href="image.url"
 		:title="image.name"
 	>
-		<ImgWithBlurhash :hash="image.blurhash" :src="url" :alt="image.comment || image.name" :title="image.comment || image.name" :width="image.properties.width" :height="image.properties.height" :cover="false"/>
+		<ImgWithBlurhash
+			:hash="image.blurhash"
+			:src="(defaultStore.state.enableDataSaverMode && hide) ? null : url"
+			:force-blurhash="hide"
+			:cover="hide"
+			:alt="image.comment || image.name"
+			:title="image.comment || image.name"
+			:width="image.properties.width"
+			:height="image.properties.height"
+			:style="hide ? 'filter: brightness(0.5);' : null"
+		/>
 	</a>
-	<div :class="$style.indicators">
-		<div v-if="['image/gif', 'image/apng'].includes(image.type)" :class="$style.indicator">GIF</div>
-		<div v-if="image.comment" :class="$style.indicator">ALT</div>
-		<div v-if="image.isSensitive" :class="$style.indicator" style="color: var(--warn);">NSFW</div>
+	<template v-if="hide">
+		<div :class="$style.hiddenText">
+		<div :class="$style.hiddenTextWrapper">
+			<b v-if="image.isSensitive" style="display: block;"><i class="ti ti-alert-triangle"></i> {{ i18n.ts.sensitive }}{{ defaultStore.state.enableDataSaverMode ? ` (${i18n.ts.image}${image.size ? ' ' + bytes(image.size) : ''})` : '' }}</b>
+			<b v-else style="display: block;"><i class="ti ti-photo"></i> {{ defaultStore.state.enableDataSaverMode && image.size ? bytes(image.size) : i18n.ts.image }}</b>
+			<span style="display: block;">{{ i18n.ts.clickToShow }}</span>
+		</div>
 	</div>
-	<button v-tooltip="i18n.ts.hide" :class="$style.hide" class="_button" @click="hide = true"><i class="ti ti-eye-off"></i></button>
-	<button :class="$style.menu" class="_button" @click.stop="showMenu"><i class="ti ti-dots"></i></button>
+	</template>
+	<template v-else>
+		<div :class="$style.indicators">
+			<div v-if="['image/gif', 'image/apng'].includes(image.type)" :class="$style.indicator">GIF</div>
+			<div v-if="image.comment" :class="$style.indicator">ALT</div>
+			<div v-if="image.isSensitive" :class="$style.indicator" style="color: var(--warn);">NSFW</div>
+		</div>
+		<button v-tooltip="i18n.ts.hide" :class="$style.hide" class="_button" @click.stop.prevent="hide = true"><i class="ti ti-eye-off"></i></button>
+	</template>
 </div>
 </template>
 
@@ -53,6 +67,12 @@ const url = $computed(() => (props.raw || defaultStore.state.loadRawImages)
 		: props.image.thumbnailUrl,
 );
 
+function onclick() {
+	if (hide) {
+		hide = false;
+	}
+}
+
 // Plugin:register_note_view_interruptor を使って書き換えられる可能性があるためwatchする
 watch(() => props.image, () => {
 	hide = (defaultStore.state.nsfw === 'force' || defaultStore.state.enableDataSaverMode) ? true : (props.image.isSensitive && defaultStore.state.nsfw !== 'ignore');

packages/frontend/src/workers/draw-blurhash.ts

@@ -0,0 +1,23 @@
+import { decode } from 'blurhash';
+
+let canvas: OffscreenCanvas;
+
+onmessage = async (event) => {
+    if ('canvas' in event.data) {
+        canvas = event.data.canvas;
+    }
+    if (!canvas) {
+        throw new Error('Canvas not set');
+    }
+    if (!('hash' in event.data && typeof event.data.hash === 'string')) {
+        return;
+    }
+    const width = event.data.width ?? 64;
+    const height = event.data.height ?? 64;
+	const ctx = canvas.getContext!('2d');
+    if (!ctx) return;
+	const imageData = ctx.createImageData(width, height);
+    const pixels = decode(event.data.hash, width, height);
+	imageData.data.set(pixels);
+	ctx.putImageData(imageData, 0, 0);
+};

packages/frontend/src/workers/tsconfig.json

@@ -0,0 +1,5 @@
+{
+	"compilerOptions": {
+		"lib": ["esnext", "webworker"],
+	}
+}

packages/frontend/vite.config.ts

@@ -139,6 +139,10 @@ export function getConfig(): UserConfig {
 			},
 		},
 
+		worker: {
+			format: 'es',
+		},
+
 		test: {
 			environment: 'happy-dom',
 			deps: {