feat: webp convert @frontend (misskey-dev#11150)

* webp convert @frontend * 0.85 → 0.90 --------- Co-authored-by: tamaina <[email protected]>
Secineralyr · Jul 21, 2023 · e6b959b · e6b959b
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commit e6b959b
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diff --git a/packages/frontend/src/scripts/upload/compress-config.ts b/packages/frontend/src/scripts/upload/compress-config.ts
@@ -1,15 +1,23 @@
 import isAnimated from 'is-file-animated';
+import { isWebpSupported } from './isWebpSupported';
 import type { BrowserImageResizerConfig } from 'browser-image-resizer';
 
 const compressTypeMap = {
+	'image/jpeg': { quality: 0.90, mimeType: 'image/webp' },
+	'image/png': { quality: 1, mimeType: 'image/webp' },
+	'image/webp': { quality: 0.90, mimeType: 'image/webp' },
+	'image/svg+xml': { quality: 1, mimeType: 'image/webp' },
+} as const;
+
+const compressTypeMapFallback = {
 	'image/jpeg': { quality: 0.85, mimeType: 'image/jpeg' },
 	'image/png': { quality: 1, mimeType: 'image/png' },
 	'image/webp': { quality: 0.85, mimeType: 'image/jpeg' },
 	'image/svg+xml': { quality: 1, mimeType: 'image/png' },
 } as const;
 
 export async function getCompressionConfig(file: File): Promise<BrowserImageResizerConfig | undefined> {
-	const imgConfig = compressTypeMap[file.type];
+	const imgConfig = (isWebpSupported() ? compressTypeMap : compressTypeMapFallback)[file.type];
 	if (!imgConfig || await isAnimated(file)) {
 		return;
 	}

diff --git a/packages/frontend/src/scripts/upload/isWebpSupported.ts b/packages/frontend/src/scripts/upload/isWebpSupported.ts
@@ -0,0 +1,10 @@
+let isWebpSupportedCache: boolean | undefined;
+export function isWebpSupported() {
+	if (isWebpSupportedCache === undefined) {
+		const canvas = document.createElement('canvas');
+		canvas.width = 1;
+		canvas.height = 1;
+		isWebpSupportedCache = canvas.toDataURL('image/webp').startsWith('data:image/webp');
+	}
+	return isWebpSupportedCache;
+}