1 files changed, 19 insertions, 0 deletions
diff --git a/src/imports/controls/material/shaders/RectangularGlow.frag b/src/imports/controls/material/shaders/RectangularGlow.frag
new file mode 100644
index 00000000..40bab580
--- /dev/null
+++ b/src/imports/controls/material/shaders/RectangularGlow.frag
@@ -0,0 +1,19 @@
+uniform highp float qt_Opacity;
+uniform mediump float relativeSizeX;
+uniform mediump float relativeSizeY;
+uniform mediump float spread;
+uniform lowp vec4 color;
+varying highp vec2 qt_TexCoord0;
+
+highp float linearstep(highp float e0, highp float e1, highp float x) {
+    return clamp((x - e0) / (e1 - e0), 0.0, 1.0);
+}
+
+void main() {
+    lowp 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));
+
+    highp float spreadMultiplier = linearstep(spread, 1.0 - spread, alpha);
+    gl_FragColor = color * qt_Opacity * spreadMultiplier * spreadMultiplier;
+}