From a239f91e7146d35082ffb594c1d6a279020cc8b4 Mon Sep 17 00:00:00 2001
From: Su_Laus <sulau@freenet.de>
Date: Tue, 21 Nov 2023 16:58:05 +0800
Subject: [PATCH] Check also if codec of input image is available,
 independently from codec check of output image and return with error if not.
 Fixes #606.

---
 tools/tiffcp.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tools/tiffcp.c b/tools/tiffcp.c
index 7120837..5b2e879 100644
--- a/tools/tiffcp.c
+++ b/tools/tiffcp.c
@@ -724,6 +724,8 @@ tiffcp(TIFF* in, TIFF* out)
 	else
 		CopyField(TIFFTAG_COMPRESSION, compression);
 	TIFFGetFieldDefaulted(in, TIFFTAG_COMPRESSION, &input_compression);
+    if (!TIFFIsCODECConfigured(input_compression))
+        return FALSE;
 	TIFFGetFieldDefaulted(in, TIFFTAG_PHOTOMETRIC, &input_photometric);
 	if (input_compression == COMPRESSION_JPEG) {
 		/* Force conversion to RGB */
-- 
2.27.0

