From 08f64c4145fa6c10d2831e489d2c6ddb07f4f96e Mon Sep 17 00:00:00 2001
From: Laurentiu Ilie <lilie@exchange.transip.nl>
Date: Thu, 23 Jul 2020 16:27:41 +0200
Subject: [PATCH] remove test file and add the check

---
 type_test.go | 1 -
 vips.go      | 7 ++++++-
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/type_test.go b/type_test.go
index 83fee7b..f3ee219 100644
--- a/type_test.go
+++ b/type_test.go
@@ -21,7 +21,6 @@ func TestDeterminateImageType(t *testing.T) {
 		{"test.jp2", MAGICK},
 		{"test.heic", HEIF},
 		{"test2.heic", HEIF},
-		{"C001.heic", HEIF},
 	}
 
 	for _, file := range files {
diff --git a/vips.go b/vips.go
index 6a77570..8c55f62 100644
--- a/vips.go
+++ b/vips.go
@@ -654,6 +654,11 @@ func vipsImageType(buf []byte) ImageType {
 		// This is a HEIF file
 		return HEIF
 	}
+	if IsTypeSupported(HEIF) && buf[4] == 0x66 && buf[5] == 0x74 && buf[6] == 0x79 && buf[7] == 0x70 &&
+		buf[8] == 0x6d && buf[9] == 0x73 && buf[10] == 0x66 && buf[11] == 0x31 {
+		// This is a HEIFS file
+		return HEIF
+	}
 
 	return UNKNOWN
 }
@@ -733,4 +738,4 @@ func vipsGamma(image *C.VipsImage, Gamma float64) (*C.VipsImage, error) {
 		return nil, catchVipsError()
 	}
 	return out, nil
-}
\ No newline at end of file
+}