From df37d6f9bc0471cd6c495ae523aa6242d88b5aa0 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?H=C3=A9ctor=20Ram=C3=B3n=20Jim=C3=A9nez?= <hector@hecrj.dev>
Date: Mon, 12 May 2025 18:11:51 +0200
Subject: [PATCH] Replace `blend` with `mix` equivalent in `quad` shaders

---
 wgpu/src/shader/quad.wgsl          | 4 ----
 wgpu/src/shader/quad/gradient.wgsl | 2 +-
 wgpu/src/shader/quad/solid.wgsl    | 4 ++--
 3 files changed, 3 insertions(+), 7 deletions(-)

diff --git a/wgpu/src/shader/quad.wgsl b/wgpu/src/shader/quad.wgsl
index bef8bd40..ff9fdae6 100644
--- a/wgpu/src/shader/quad.wgsl
+++ b/wgpu/src/shader/quad.wgsl
@@ -9,10 +9,6 @@ fn premultiply(color: vec4<f32>) -> vec4<f32> {
     return vec4(color.xyz * color.a, color.a);
 }
 
-fn blend(over: vec4<f32>, under: vec4<f32>, alpha: f32) -> vec4<f32> {
-    return over * alpha + under * (1.0 - alpha);
-}
-
 fn distance_alg(
     frag_coord: vec2<f32>,
     position: vec2<f32>,
diff --git a/wgpu/src/shader/quad/gradient.wgsl b/wgpu/src/shader/quad/gradient.wgsl
index d743e26d..e8c54790 100644
--- a/wgpu/src/shader/quad/gradient.wgsl
+++ b/wgpu/src/shader/quad/gradient.wgsl
@@ -179,7 +179,7 @@ fn gradient_fs_main(input: GradientVertexOutput) -> @location(0) vec4<f32> {
             internal_distance
         );
 
-        mixed_color = blend(input.border_color, mixed_color, border_mix);
+        mixed_color = mix(mixed_color, input.border_color, border_mix);
     }
 
     var dist: f32 = distance_alg(
diff --git a/wgpu/src/shader/quad/solid.wgsl b/wgpu/src/shader/quad/solid.wgsl
index d5d1e604..f4c39f3d 100644
--- a/wgpu/src/shader/quad/solid.wgsl
+++ b/wgpu/src/shader/quad/solid.wgsl
@@ -97,7 +97,7 @@ fn solid_fs_main(
             internal_distance
         );
 
-        mixed_color = blend(input.border_color, input.color, border_mix);
+        mixed_color = mix(input.color, input.border_color, border_mix);
     }
 
     var dist: f32 = distance_alg(
@@ -125,7 +125,7 @@ fn solid_fs_main(
         let shadow_distance = max(rounded_box_sdf(input.position.xy - input.pos - input.shadow_offset - (input.scale / 2.0), input.scale / 2.0, shadow_radius), 0.);
         let shadow_alpha = 1.0 - smoothstep(-input.shadow_blur_radius, input.shadow_blur_radius, shadow_distance);
 
-        return blend(input.shadow_color, quad_color, (1.0 - radius_alpha) * shadow_alpha);
+        return mix(quad_color, input.shadow_color, (1.0 - radius_alpha) * shadow_alpha);
     } else {
         return quad_color;
     }