update: drag and drop + compression des textures

lib/texture-compression.ts

@@ -0,0 +1,47 @@
+import { extname } from 'path'
+import sharp from 'sharp'
+
+interface TextureCompressionResult {
+  buffer: Buffer
+  compressed: boolean
+  error?: string
+}
+
+export async function compressTextureBuffer(
+  filename: string,
+  buffer: Buffer,
+): Promise<TextureCompressionResult> {
+  const ext = extname(filename).toLowerCase()
+
+  try {
+    if (ext === '.jpg' || ext === '.jpeg') {
+      return {
+        buffer: await sharp(buffer).jpeg({ quality: 82, mozjpeg: true }).toBuffer(),
+        compressed: true,
+      }
+    }
+
+    if (ext === '.png') {
+      return {
+        buffer: await sharp(buffer).png({ compressionLevel: 9, adaptiveFiltering: true }).toBuffer(),
+        compressed: true,
+      }
+    }
+
+    if (ext === '.webp') {
+      return {
+        buffer: await sharp(buffer).webp({ quality: 82 }).toBuffer(),
+        compressed: true,
+      }
+    }
+  } catch (err) {
+    const message = err instanceof Error ? err.message : String(err)
+    return {
+      buffer,
+      compressed: false,
+      error: `Compression texture echouee pour ${filename}: ${message}`,
+    }
+  }
+
+  return { buffer, compressed: false }
+}