1 files changed, 25 insertions, 0 deletions
diff --git a/src/quickcontrols2/material/shaders/+glslcore/RectangularGlow.frag b/src/quickcontrols2/material/shaders/+glslcore/RectangularGlow.frag
new file mode 100644
index 00000000..432d86b5
--- /dev/null
+++ b/src/quickcontrols2/material/shaders/+glslcore/RectangularGlow.frag
@@ -0,0 +1,25 @@
+#version 150
+
+uniform float qt_Opacity;
+uniform float relativeSizeX;
+uniform float relativeSizeY;
+uniform float spread;
+uniform vec4 color;
+
+in vec2 qt_TexCoord0;
+out vec4 fragColor;
+
+float linearstep(float e0, float e1, float x)
+{
+    return clamp((x - e0) / (e1 - e0), 0.0, 1.0);
+}
+
+void main()
+{
+    float alpha =
+        smoothstep(0.0, relativeSizeX, 0.5 - abs(0.5 - qt_TexCoord0.x)) *
+        smoothstep(0.0, relativeSizeY, 0.5 - abs(0.5 - qt_TexCoord0.y));
+
+    float spreadMultiplier = linearstep(spread, 1.0 - spread, alpha);
+    fragColor = color * qt_Opacity * spreadMultiplier * spreadMultiplier;
+}