From 7eff2b83c4a0dca0d70559cfea754d5920c7415d Mon Sep 17 00:00:00 2001
From: David Capello <davidcapello@gmail.com>
Date: Fri, 19 May 2017 10:23:46 -0300
Subject: [PATCH] Fail when an invalid algorithm is specified in
 --dithering-algorithm

---
 src/app/cli/cli_processor.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/app/cli/cli_processor.cpp b/src/app/cli/cli_processor.cpp
index 248276da3..127d9ff66 100644
--- a/src/app/cli/cli_processor.cpp
+++ b/src/app/cli/cli_processor.cpp
@@ -352,6 +352,10 @@ void CliProcessor::process()
             ditheringAlgorithm = render::DitheringAlgorithm::OldOrdered;
           else if (value.value() == "ordered")
             ditheringAlgorithm = render::DitheringAlgorithm::Ordered;
+          else
+            throw std::runtime_error("--dithering-algorithm needs a valid algorithm name\n"
+                                     "Usage: --dithering-algorithm <algorithm>\n"
+                                     "Where <algorithm> can be none, old-ordered, or ordered");
         }
         // --color-mode <mode>
         else if (opt == &m_options.colorMode()) {