From 6b6f8790d594c0e870055109c9aef71469c5a934 Mon Sep 17 00:00:00 2001
From: Thomas Bernard <miniupnp@free.fr>
Date: Sun, 20 Dec 2020 17:48:07 +0100
Subject: [PATCH] fix the "Screen_size_in_GIF" feature. The canvas must not be
 smaller than the picture !

---
 src/giformat.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/giformat.c b/src/giformat.c
index bf2b7d01..45f27cdc 100644
--- a/src/giformat.c
+++ b/src/giformat.c
@@ -879,8 +879,9 @@ void Save_GIF(T_IO_Context * context)
       alphabet_sister = (word *)GFX2_malloc(4096*sizeof(word));
 
       // On initialise le LSDB du fichier
-      if (Config.Screen_size_in_GIF)
+      if (Config.Screen_size_in_GIF && Screen_width >= context->Width && Screen_height >= context->Height)
       {
+        // Canvas bigger than the image
         LSDB.Width=Screen_width;
         LSDB.Height=Screen_height;
       }