From 33aa5060c25cfb00294638c2c4f6ae4de047d3a7 Mon Sep 17 00:00:00 2001
From: Brenden Matthews <brenden@brndn.io>
Date: Tue, 9 Mar 2021 07:54:37 -0600
Subject: [PATCH] Make sure gradient width is >=2.

This should resolve #1070 for real this time.
---
 src/colours.cc      | 4 ++++
 src/hsv_gradient.cc | 3 +++
 2 files changed, 7 insertions(+)

diff --git a/src/colours.cc b/src/colours.cc
index 3ffc578d..4437aa46 100644
--- a/src/colours.cc
+++ b/src/colours.cc
@@ -92,6 +92,10 @@ std::unique_ptr<unsigned long[]> do_gradient(int width,
   int reddiff, greendiff, bluediff;  // difference
   short redshift = (2 * colour_depth / 3 + colour_depth % 3);
   short greenshift = (colour_depth / 3);
+
+  // Make sure the width is always at least 2
+  width = std::max(2, width);
+
   std::unique_ptr<unsigned long[]> colours(new unsigned long[width]);
 
   if (colour_depth == 0) { set_up_gradient(); }
diff --git a/src/hsv_gradient.cc b/src/hsv_gradient.cc
index 6adc94d4..0962e0c3 100644
--- a/src/hsv_gradient.cc
+++ b/src/hsv_gradient.cc
@@ -153,6 +153,9 @@ std::unique_ptr<unsigned long[]> do_hsv_gradient(int width,
   int redshift = (2 * colour_depth / 3 + colour_depth % 3);
   int greenshift = (colour_depth / 3);
 
+  // Make sure the width is always at least 2
+  width = std::max(2, width);
+
   std::unique_ptr<unsigned long[]> colours(new unsigned long[width]);
 
   if (colour_depth == 0) { set_up_gradient(); }