Faster alpha reduction

shssoichiro · Feb 3, 2025 · 1b9e421 · 1b9e421
1 parent 76d24ff
commit 1b9e421
Showing 1 changed file with 4 additions and 1 deletion.
diff --git a/src/reduction/alpha.rs b/src/reduction/alpha.rs
@@ -80,7 +80,10 @@ pub fn reduced_alpha_channel(png: &PngImage, optimize_alpha: bool) -> Option<Png
             Some(trns) if pixel.iter().skip(colored_bytes).all(|b| *b == 0) => {
                 raw_data.resize(raw_data.len() + colored_bytes, trns);
             }
-            _ => raw_data.extend_from_slice(&pixel[0..colored_bytes]),
+            _ if colored_bytes == 6 => raw_data.extend_from_slice(&pixel[0..6]),
+            _ if colored_bytes == 3 => raw_data.extend_from_slice(&pixel[0..3]),
+            _ if colored_bytes == 2 => raw_data.extend_from_slice(&pixel[0..2]),
+            _ => raw_data.push(pixel[0]),
         };
     }