1 files changed, 20 insertions, 0 deletions
diff --git a/vendor/gioui.org/shader/gio/cover.frag b/vendor/gioui.org/shader/gio/cover.frag
new file mode 100644
index 0000000..34c5e4c
--- /dev/null
+++ b/vendor/gioui.org/shader/gio/cover.frag
@@ -0,0 +1,20 @@
+#version 310 es
+
+// SPDX-License-Identifier: Unlicense OR MIT
+
+precision mediump float;
+
+{{.Header}}
+
+layout(location = 0) in highp vec2 vCoverUV;
+layout(location = 1) in highp vec2 vUV;
+
+layout(binding = 1) uniform sampler2D cover;
+
+layout(location = 0) out vec4 fragColor;
+
+void main() {
+    fragColor = {{.FetchColorExpr}};
+	float c = min(abs(texture(cover, vCoverUV).r), 1.0);
+	fragColor *= c;
+}