[babl] babl: adjust default path parameters to a path_length of 3

[Øyvind "pippin" Kolås <ok src gnome org>]

commit 950ad3faac1d12f47ed4cd0f70a07ed99ac11e25
Author: Øyvind Kolås <pippin gimp org>
Date:   Sun Jan 23 04:18:01 2022 +0100

    babl: adjust default path parameters to a path_length of 3
    
    Also adjust so that the max additional bits of depth is 2, this makes us
    catch some fast paths that are missed by very promising slow two-step
    converters.

 babl/babl-fish-path.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)
---
diff --git a/babl/babl-fish-path.c b/babl/babl-fish-path.c
index 32da078..f005a86 100644
--- a/babl/babl-fish-path.c
+++ b/babl/babl-fish-path.c
@@ -145,9 +145,9 @@ max_path_length (void)
   if (env)
     max_length = atoi (env);
   else
-    max_length = 2; /* reducing this number makes finding short fishes much
+    max_length = 3; /* reducing this number makes finding short fishes much
                        faster - even if we lose out on some of the fast
-                       bigger fish, the fishes we can get with a max_length of 2
+                       bigger fish, the fishes we can get with a max_length of 3
                        is actually 5, since we deepen the search to that
                        depth if none are found within two steps in the
                        initial search.
@@ -604,7 +604,7 @@ babl_fish_path2 (const Babl *source,
   {
     PathContext pc;
     int start_depth = max_path_length ();
-    int end_depth = start_depth + 2 + ((destination->format.space != sRGB)?1:0);
+    int end_depth = start_depth + 1 + ((destination->format.space != sRGB)?1:0);
     end_depth = MIN(end_depth, BABL_HARD_MAX_PATH_LENGTH);
 
     pc.current_path = babl_list_init_with_size (BABL_HARD_MAX_PATH_LENGTH);