From b903f5a5e9250691bab6644200b244a0da961219 Mon Sep 17 00:00:00 2001
From: cc <cc@localhost>
Date: Wed, 20 Aug 2025 21:01:36 -0700
Subject: Move flood fill

Make it crate-available
---
 src/label_formats/mod.rs | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)

(limited to 'src/label_formats/mod.rs')

diff --git a/src/label_formats/mod.rs b/src/label_formats/mod.rs
index 1e3e4ae..b48486a 100644
--- a/src/label_formats/mod.rs
+++ b/src/label_formats/mod.rs
@@ -3,3 +3,31 @@ mod label_format;
 
 pub use large_label_format::LargeLabelFormat;
 pub use label_format::LabelFormat;
+
+pub(crate) fn flood(source: &LargeLabelFormat, destination: &mut Vec<u16>, 
+    x: usize, y: usize,
+    from_color: u32, to_color: u16) {
+    let width = source.width;
+    let destination_color = destination[x + y * width];
+    if destination_color != 0 {
+        return;
+    }
+    let source_color = source.buffer[x + y * width];
+    if source_color != from_color {
+        return;
+    }
+    destination[x + y * width] = to_color;
+    if x > 0 {
+        flood(source, destination, x-1, y, from_color, to_color);
+    }
+    if (x+1) < width {
+        flood(source, destination, x+1, y, from_color, to_color);
+    }
+    if y > 0 {
+        flood(source, destination, x, y-1, from_color, to_color);
+    }
+    if (y+1) < source.height {
+        flood(source, destination, x, y+1, from_color, to_color);
+    }
+}
+
-- 
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