Fix loading large workflow embedded in webp (#777)

* Fix loading large workflow embedded in webp

* Update test expectations [skip ci]

* nit

---------

Co-authored-by: github-actions <github-actions@github.com>

browser_tests/loadWorkflowInMedia.spec.ts

@@ -2,12 +2,15 @@ import { expect } from '@playwright/test'
 import { comfyPageFixture as test } from './ComfyPage'
 
 test.describe('Load Workflow in Media', () => {
-  ;['workflow.webp', 'edited_workflow.webp', 'no_workflow.webp'].forEach(
-    async (fileName) => {
-      test(`Load workflow in ${fileName}`, async ({ comfyPage }) => {
-        await comfyPage.dragAndDropFile(fileName)
-        await expect(comfyPage.canvas).toHaveScreenshot(`${fileName}.png`)
-      })
-    }
-  )
+  ;[
+    'workflow.webp',
+    'edited_workflow.webp',
+    'no_workflow.webp',
+    'large_workflow.webp'
+  ].forEach(async (fileName) => {
+    test(`Load workflow in ${fileName}`, async ({ comfyPage }) => {
+      await comfyPage.dragAndDropFile(fileName)
+      await expect(comfyPage.canvas).toHaveScreenshot(`${fileName}.png`)
+    })
+  })
 })

src/scripts/pnginfo.ts

@@ -50,8 +50,8 @@ function parseExifData(exifData) {
       let value
       if (type === 2) {
         // ASCII string
-        value = String.fromCharCode(
-          ...exifData.slice(valueOffset, valueOffset + numValues - 1)
+        value = new TextDecoder('utf-8').decode(
+          exifData.subarray(valueOffset, valueOffset + numValues - 1)
         )
       }