From 52ff5964e677526cc5a84f030c69ae76fa0da0cc Mon Sep 17 00:00:00 2001
From: +merlan #flirora <flirora@flirora.xyz>
Date: Tue, 24 Jun 2025 17:23:09 -0400
Subject: [PATCH] Make behavior match PDF backend behavior again

---
 crates/typst-library/src/visualize/gradient.rs  |  12 +++++++++---
 ...162-coincident-gradient-stops-export-png.png | Bin 520 -> 522 bytes
 2 files changed, 9 insertions(+), 3 deletions(-)

diff --git a/crates/typst-library/src/visualize/gradient.rs b/crates/typst-library/src/visualize/gradient.rs
index 20539197c..f61a60ee4 100644
--- a/crates/typst-library/src/visualize/gradient.rs
+++ b/crates/typst-library/src/visualize/gradient.rs
@@ -1287,13 +1287,19 @@ fn sample_stops(stops: &[(Color, Ratio)], mixing_space: ColorSpace, t: f64) -> C
     assert!(!stops.is_empty(), "Cannot sample from gradient with no stops");
 
     let t = t.clamp(0.0, 1.0);
-    let j = stops.partition_point(|(_, ratio)| ratio.get() < t);
+    let mut j = stops.partition_point(|(_, ratio)| ratio.get() < t);
 
     if j == 0 {
-        return stops[0].0;
+        while stops.get(j + 1).is_some_and(|(_, r)| r.is_zero()) {
+            j += 1;
+        }
+        return stops[j].0;
     }
     if j == stops.len() {
-        return stops.last().unwrap().0;
+        while j > 0 && stops[j].1.is_one() {
+            j -= 1;
+        }
+        return stops[j].0;
     }
 
     let (col_0, pos_0) = stops[j - 1];
diff --git a/tests/ref/issue-6162-coincident-gradient-stops-export-png.png b/tests/ref/issue-6162-coincident-gradient-stops-export-png.png
index 886ea195d7803623f0422d1c66e6edd2a1797c34..d269342c7c6678e525f62b7d85b080e2fcfd812d 100644
GIT binary patch
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