Open BigTIFF (64-bit) files using the custom TIFF loader.

In the worst case, old libtiff versions will return a different error.
See http://www.awaresystems.be/imaging/tiff/bigtiff.html for more info.

diff --git a/src/image-load.c b/src/image-load.c
index 0a4cda6..bafc16c 100644 (file)
--- a/src/image-load.c
+++ b/src/image-load.c
@@ -614,6 +614,8 @@ static void image_loader_setup_loader(ImageLoader *il)
 #ifdef HAVE_TIFF
        if (il->bytes_total >= 10 &&
            (memcmp(il->mapped_file, "MM\0*", 4) == 0 ||
+            memcmp(il->mapped_file, "MM\0+\0\x08\0\0", 8) == 0 ||
+            memcmp(il->mapped_file, "II+\0\x08\0\0\0", 8) == 0 ||
             memcmp(il->mapped_file, "II*\0", 4) == 0))
                {
                DEBUG_1("Using custom tiff loader");