Handle invariant decoration more robustly.

Avoids certain cases of variance between translation units by forcing
every dependent expression of a store to be temporary.
Should avoid the major failure cases where invariance matters.

1 files changed, 13 insertions, 0 deletions

diff --git a/shaders/vert/invariant.vert b/shaders/vert/invariant.vert
new file mode 100644
index 00000000..239b985d
--- /dev/null
+++ b/shaders/vert/invariant.vert
@@ -0,0 +1,13 @@
+#version 310 es
+
+invariant gl_Position;
+layout(location = 0) invariant out vec4 vColor;
+layout(location = 0) in vec4 vInput0;
+layout(location = 1) in vec4 vInput1;
+layout(location = 2) in vec4 vInput2;
+
+void main()
+{
+	gl_Position = vInput0 + vInput1 * vInput2;
+	vColor = (vInput0 - vInput1) * vInput2;
+}