From 130e04d9a54f79003cfb8d60f554ff7097b0f188 Mon Sep 17 00:00:00 2001
From: Kornel <kornel@geekhood.net>
Date: Sun, 22 Jan 2023 20:04:50 +0000
Subject: [PATCH] Lowest qualities limit number of colors

---
 src/lib.rs | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/lib.rs b/src/lib.rs
index 28500e9..b4753ab 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -411,6 +411,9 @@ impl Writer {
             100 // the first frame is too important to ruin it
         };
         liq.set_quality(0, quality)?;
+        if settings.s.quality < 50 {
+            liq.set_max_colors(u32::from(settings.s.quality * 2).max(16).next_power_of_two())?;
+        }
         let (buf, width, height) = image.into_contiguous_buf();
         let mut img = liq.new_image(buf, width, height, 0.)?;
         // only later remapping tracks which area has been damaged by transparency