From dca526405ea6233bbc6694397b5c7dec7f9a78d9 Mon Sep 17 00:00:00 2001
From: John Cupitt <jcupitt@gmail.com>
Date: Tue, 25 May 2021 14:06:47 +0100
Subject: [PATCH] revise old comment

---
 libvips/conversion/zoom.c | 22 ++++++++--------------
 1 file changed, 8 insertions(+), 14 deletions(-)

diff --git a/libvips/conversion/zoom.c b/libvips/conversion/zoom.c
index e5576f04..368f5cd9 100644
--- a/libvips/conversion/zoom.c
+++ b/libvips/conversion/zoom.c
@@ -52,20 +52,9 @@
 
  */
 
-/*
- * TODO:
- * Test for pixel size and use memcpy() on individual pixels once they reach
- * sizes of the order of tens of bytes. char-wise copy is quicker than 
- * memcpy() for smaller pixels.
- *
- * Also, I haven't tested it but int-wise copying may be faster still, as 
- * long as alignment permits it.
- *
- * tcv.  2006-09-01
- */
-
-/* Turn on ADDR() range checks.
-#define DEBUG 1
+/* 
+#define DEBUG 
+#define DEBUG_VERBOSE
  */
 
 #ifdef HAVE_CONFIG_H
@@ -254,6 +243,11 @@ vips_zoom_gen( VipsRegion *or, void *seq, void *a, void *b, gboolean *stop )
 	int left, right, top, bottom;
 	int width, height;
 
+#ifdef DEBUG_VERBOSE
+	printf( "vips_zoom_gen: left=%d, top=%d, width=%d, height=%d\n", 
+		r->left, r->top, r->width, r->height );
+#endif /*DEBUG_VERBOSE*/
+
 	/* Area of input we need. We have to round out, as we may have
 	 * part-pixels all around the edges.
 	 */