6 files changed, 13 insertions, 3 deletions
diff --git a/src/render_helpers/shaders/border.frag b/src/render_helpers/shaders/border.frag
index adbc124b..fe121037 100644
--- a/src/render_helpers/shaders/border.frag
+++ b/src/render_helpers/shaders/border.frag
@@ -5,6 +5,7 @@ uniform float niri_tint;
 #endif
 
 uniform float niri_alpha;
+uniform float niri_scale;
 
 uniform vec2 niri_size;
 varying vec2 niri_v_coords;
@@ -56,7 +57,8 @@ float rounding_alpha(vec2 coords, vec2 size, vec4 corner_radius) {
     }
 
     float dist = distance(coords, center);
-    return 1.0 - smoothstep(radius - 0.5, radius + 0.5, dist);
+    float half_px = 0.5 / niri_scale;
+    return 1.0 - smoothstep(radius - half_px, radius + half_px, dist);
 }
 
 void main() {
diff --git a/src/render_helpers/shaders/clipped_surface.frag b/src/render_helpers/shaders/clipped_surface.frag
index 7bee28b1..f0c6e7f8 100644
--- a/src/render_helpers/shaders/clipped_surface.frag
+++ b/src/render_helpers/shaders/clipped_surface.frag
@@ -20,6 +20,8 @@ varying vec2 v_coords;
 uniform float tint;
 #endif
 
+uniform float niri_scale;
+
 uniform vec2 geo_size;
 uniform vec4 corner_radius;
 uniform mat3 input_to_geo;
@@ -45,7 +47,8 @@ float rounding_alpha(vec2 coords, vec2 size) {
     }
 
     float dist = distance(coords, center);
-    return 1.0 - smoothstep(radius - 0.5, radius + 0.5, dist);
+    float half_px = 0.5 / niri_scale;
+    return 1.0 - smoothstep(radius - half_px, radius + half_px, dist);
 }
 
 void main() {
diff --git a/src/render_helpers/shaders/close_prelude.frag b/src/render_helpers/shaders/close_prelude.frag
index db42190b..4d6abc71 100644
--- a/src/render_helpers/shaders/close_prelude.frag
+++ b/src/render_helpers/shaders/close_prelude.frag
@@ -18,4 +18,5 @@ uniform float niri_clamped_progress;
 uniform float niri_random_seed;
 
 uniform float niri_alpha;
+uniform float niri_scale;
 
diff --git a/src/render_helpers/shaders/mod.rs b/src/render_helpers/shaders/mod.rs
index 12e9d4ed..b4824931 100644
--- a/src/render_helpers/shaders/mod.rs
+++ b/src/render_helpers/shaders/mod.rs
@@ -55,6 +55,7 @@ impl Shaders {
             .compile_custom_texture_shader(
                 include_str!("clipped_surface.frag"),
                 &[
+                    UniformName::new("niri_scale", UniformType::_1f),
                     UniformName::new("geo_size", UniformType::_2f),
                     UniformName::new("corner_radius", UniformType::_4f),
                     UniformName::new("input_to_geo", UniformType::Matrix3x3),
diff --git a/src/render_helpers/shaders/open_prelude.frag b/src/render_helpers/shaders/open_prelude.frag
index db42190b..4d6abc71 100644
--- a/src/render_helpers/shaders/open_prelude.frag
+++ b/src/render_helpers/shaders/open_prelude.frag
@@ -18,4 +18,5 @@ uniform float niri_clamped_progress;
 uniform float niri_random_seed;
 
 uniform float niri_alpha;
+uniform float niri_scale;
 
diff --git a/src/render_helpers/shaders/resize_prelude.frag b/src/render_helpers/shaders/resize_prelude.frag
index 5c052277..519b1ee4 100644
--- a/src/render_helpers/shaders/resize_prelude.frag
+++ b/src/render_helpers/shaders/resize_prelude.frag
@@ -25,6 +25,7 @@ uniform vec4 niri_corner_radius;
 uniform float niri_clip_to_geometry;
 
 uniform float niri_alpha;
+uniform float niri_scale;
 
 float niri_rounding_alpha(vec2 coords, vec2 size) {
     vec2 center;
@@ -47,5 +48,6 @@ float niri_rounding_alpha(vec2 coords, vec2 size) {
     }
 
     float dist = distance(coords, center);
-    return 1.0 - smoothstep(radius - 0.5, radius + 0.5, dist);
+    float half_px = 0.5 / niri_scale;
+    return 1.0 - smoothstep(radius - half_px, radius + half_px, dist);
 }