1 files changed, 23 insertions, 0 deletions
diff --git a/src/effects/shaders_ng/thresholdmask.frag b/src/effects/shaders_ng/thresholdmask.frag
new file mode 100644
index 0000000..7740e7e
--- /dev/null
+++ b/src/effects/shaders_ng/thresholdmask.frag
@@ -0,0 +1,23 @@
+#version 440
+
+layout(location = 0) in vec2 qt_TexCoord0;
+layout(location = 0) out vec4 fragColor;
+
+layout(std140, binding = 0) uniform buf {
+    // qt_Matrix and qt_Opacity must always be both present
+    // if the built-in vertex shader is used.
+    mat4 qt_Matrix;
+    float qt_Opacity;
+    float threshold;
+    float spread;
+};
+
+layout(binding = 1) uniform sampler2D source;
+layout(binding = 2) uniform sampler2D maskSource;
+
+void main()
+{
+    vec4 colorFragment = texture(source, qt_TexCoord0.st);
+    vec4 maskFragment = texture(maskSource, qt_TexCoord0.st);
+    fragColor = colorFragment * smoothstep(threshold * (1.0 + spread) - spread, threshold * (1.0 + spread), maskFragment.a) * qt_Opacity;
+}