From 953861ab30222535fb3ad8a6cc80d7f339c530c7 Mon Sep 17 00:00:00 2001
From: Simon Willison <swillison@gmail.com>
Date: Tue, 26 Mar 2024 16:26:17 -0700
Subject: [PATCH] File signatures for heic/heif, refs #1613

---
 src/core/lib/FileSignatures.mjs | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/src/core/lib/FileSignatures.mjs b/src/core/lib/FileSignatures.mjs
index 4cba4bc7..69157a1b 100644
--- a/src/core/lib/FileSignatures.mjs
+++ b/src/core/lib/FileSignatures.mjs
@@ -72,6 +72,27 @@ export const FILE_SIGNATURES = {
             },
             extractor: extractWEBP
         },
+        {
+            name: "High Efficiency Image File Format",
+            extension: "heic,heif",
+            mime: "image/heif",
+            description: "",
+            signature: {
+                0: 0x00,
+                1: 0x00,
+                2: 0x00,
+                // 3 could be 0x24 or 0x18, so skip it
+                4: 0x66, // ftypheic
+                5: 0x74,
+                6: 0x79,
+                7: 0x70,
+                8: 0x68,
+                9: 0x65,
+                10: 0x69,
+                11: 0x63
+            },
+            extractor: null
+        },
         {
             name: "Camera Image File Format",
             extension: "crw",