1 files changed, 21 insertions, 0 deletions
diff --git a/examples/quick/shadereffects/content/shaders/rhi/shadow.frag b/examples/quick/shadereffects/content/shaders/rhi/shadow.frag
new file mode 100644
index 0000000000..8247517b6d
--- /dev/null
+++ b/examples/quick/shadereffects/content/shaders/rhi/shadow.frag
@@ -0,0 +1,21 @@
+#version 440
+
+layout(location = 0) in vec2 qt_TexCoord0;
+layout(location = 0) out vec4 fragColor;
+
+layout(binding = 1) uniform sampler2D source;
+layout(binding = 2) uniform sampler2D shadow;
+
+layout(std140, binding = 0) uniform buf {
+    mat4 qt_Matrix;
+    float qt_Opacity;
+    float darkness;
+    vec2 delta;
+} ubuf;
+
+void main()
+{
+    vec4 fg = texture(source, qt_TexCoord0);
+    vec4 bg = texture(shadow, qt_TexCoord0 + ubuf.delta);
+    fragColor = (fg + vec4(0., 0., 0., ubuf.darkness * bg.a) * (1. - fg.a)) * ubuf.qt_Opacity;
+}