From e77578a53f8bba0d1bf20cce4eb047fb71afcb79 Mon Sep 17 00:00:00 2001
From: Floyd Wang <gassnake999@gmail.com>
Date: Tue, 12 Nov 2024 19:26:24 +0800
Subject: [PATCH] svg_img: Fix the conversion error of the SVG fill color with
 alpha (#410)

### Before
<img width="156" alt="image"
src="https://github.com/user-attachments/assets/c7177ac7-58aa-4865-81c9-4f7ddff9f145">

### After
<img width="176" alt="image"
src="https://github.com/user-attachments/assets/a010e78d-752e-4298-bf40-7a42b916e547">
---
 crates/ui/src/svg_img.rs | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/crates/ui/src/svg_img.rs b/crates/ui/src/svg_img.rs
index cb028cbf..94f8337a 100644
--- a/crates/ui/src/svg_img.rs
+++ b/crates/ui/src/svg_img.rs
@@ -131,9 +131,15 @@ impl Asset for Image {
             let mut buffer = ImageBuffer::from_raw(pixmap.width(), pixmap.height(), pixmap.take())
                 .expect("invalid svg image buffer");
 
-            // Convert from RGBA to BGRA.
+            // Convert from RGBA with premultiplied alpha to BGRA with straight alpha.
             for pixel in buffer.chunks_exact_mut(4) {
                 pixel.swap(0, 2);
+                if pixel[3] > 0 {
+                    let a = pixel[3] as f32 / 255.;
+                    pixel[0] = (pixel[0] as f32 / a) as u8;
+                    pixel[1] = (pixel[1] as f32 / a) as u8;
+                    pixel[2] = (pixel[2] as f32 / a) as u8;
+                }
             }
 
             Ok(Arc::new(RenderImage::new(SmallVec::from_elem(