1 files changed, 30 insertions, 0 deletions
diff --git a/src/effects/shaders/+glslcore/fastglow.frag b/src/effects/shaders/+glslcore/fastglow.frag
new file mode 100644
index 0000000..4e18c45
--- /dev/null
+++ b/src/effects/shaders/+glslcore/fastglow.frag
@@ -0,0 +1,30 @@
+#version 150 core
+uniform sampler2D source1;
+uniform sampler2D source2;
+uniform sampler2D source3;
+uniform sampler2D source4;
+uniform sampler2D source5;
+uniform float weight1;
+uniform float weight2;
+uniform float weight3;
+uniform float weight4;
+uniform float weight5;
+uniform vec4 color;
+uniform float spread;
+uniform float qt_Opacity;
+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() {
+    vec4 sourceColor = texture(source1, qt_TexCoord0) * weight1;
+    sourceColor += texture(source2, qt_TexCoord0) * weight2;
+    sourceColor += texture(source3, qt_TexCoord0) * weight3;
+    sourceColor += texture(source4, qt_TexCoord0) * weight4;
+    sourceColor += texture(source5, qt_TexCoord0) * weight5;
+    sourceColor = mix(vec4(0), color, linearstep(0.0, spread, sourceColor.a));
+    fragColor = sourceColor * qt_Opacity;
+}