From ceb1b96d060e22eac18007e58b1a5724b9f03d1b Mon Sep 17 00:00:00 2001
From: John Cupitt <jcupitt@gmail.com>
Date: Thu, 8 Oct 2015 17:40:37 +0100
Subject: [PATCH] note that quadratic is unfinished

---
 TODO                         | 3 +++
 libvips/resample/quadratic.c | 2 ++
 2 files changed, 5 insertions(+)

diff --git a/TODO b/TODO
index 907447ff..10e8cc19 100644
--- a/TODO
+++ b/TODO
@@ -202,6 +202,9 @@
 
   because we step across tiles left to right: y doesn't change, only x does
 
+  not sure it works for order 2 either, we are seeing interpolation errors 
+  on image edges
+
 
 mosaic
 ======
diff --git a/libvips/resample/quadratic.c b/libvips/resample/quadratic.c
index 47e1973b..1720c2f0 100644
--- a/libvips/resample/quadratic.c
+++ b/libvips/resample/quadratic.c
@@ -374,6 +374,8 @@ vips_quadratic_init( VipsQuadratic *quadratic )
  *
  * @interpolate: use this interpolator (default bilinear)
  *
+ * This operation is unfinished and unusable, sorry. 
+ *
  * See also: vips_affine().
  *
  * Returns: 0 on success, -1 on error