From 3d5f2e2b2509aa9a32680563a949d2732cbbb618 Mon Sep 17 00:00:00 2001
From: John Cupitt <jcupitt@gmail.com>
Date: Wed, 27 Jul 2016 17:11:58 +0100
Subject: [PATCH] quicker GA for gifload

---
 libvips/foreign/gifload.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/libvips/foreign/gifload.c b/libvips/foreign/gifload.c
index c6264266..15778c73 100644
--- a/libvips/foreign/gifload.c
+++ b/libvips/foreign/gifload.c
@@ -605,13 +605,13 @@ vips_foreign_load_gif_load( VipsForeignLoad *load )
 		im = t[1];
 	}
 	else if( gif->has_transparency ) {
-		/* GA.
+		/* GA. Take BA so we have neighboring channels. 
 		 */
-		if( vips_extract_band( im, &t[1], 0, NULL ) ||
-			vips_extract_band( im, &t[2], 3, NULL ) ||
-			vips_bandjoin2( t[1], t[2], &t[3], NULL ) )
+		if( vips_extract_band( im, &t[1], 2,
+			"n", 2,
+			NULL ) )
 			return( -1 );
-		im = t[3];
+		im = t[1];
 		im->Type = VIPS_INTERPRETATION_B_W;
 	}
 	else {