Support PDF files with magic byte in the header

davidbyttow · Oct 9, 2024 · 9b7e960 · 9b7e960
1 parent d925c83
commit 9b7e960
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Showing 3 changed files with 3 additions and 3 deletions.
diff --git a/resources/gif-animated.GIF_Animated-macos-14_arm64_libvips-8.15.3.golden.gif b/resources/gif-animated.GIF_Animated-macos-14_arm64_libvips-8.15.3.golden.gif
diff --git a/...gif-animated.GIF_Animated_ExportNative-macos-14_arm64_libvips-8.15.3.golden.gif b/...gif-animated.GIF_Animated_ExportNative-macos-14_arm64_libvips-8.15.3.golden.gif
diff --git a/vips/foreign.go b/vips/foreign.go
@@ -154,14 +154,14 @@ func DetermineImageType(buf []byte) ImageType {
 		return ImageTypeHEIF
 	} else if isSVG(buf) {
 		return ImageTypeSVG
-	} else if isPDF(buf) {
-		return ImageTypePDF
 	} else if isBMP(buf) {
 		return ImageTypeBMP
 	} else if isJP2K(buf) {
 		return ImageTypeJP2K
 	} else if isJXL(buf) {
 		return ImageTypeJXL
+	} else if isPDF(buf) {
+		return ImageTypePDF
 	} else {
 		return ImageTypeUnknown
 	}
@@ -240,7 +240,7 @@ func isSVG(buf []byte) bool {
 var pdf = []byte("\x25\x50\x44\x46")
 
 func isPDF(buf []byte) bool {
-	return bytes.HasPrefix(buf, pdf)
+	return bytes.Contains(buf[:1024], pdf)
 }
 
 var bmpHeader = []byte("BM")