On 10/1/19 4:35 am, Danylo Piliaiev wrote:
In all GLSL ES versions output variables in fragment shader are allowed
to be invariant.
From Section 4.6.1 ("The Invariant Qualifier") GLSL ES 1.00 spec:
"Only the following variables may be declared as invariant:
...
- Built-in special variables output from the fragment shader."
From Section 4.6.1 ("The Invariant Qualifier") GLSL ES 3.00 spec:
"Only variables output from a shader can be candidates for invariance."
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=107842
Signed-off-by: Danylo Piliaiev <[email protected]>
---
.../glslparsertest/shaders/invariant.V100.frag | 18 ++++++++++++++++++
.../glslparsertest/shaders/invariant.V300.frag | 16 ++++++++++++++++
New tests should not go in this dir. Please put them in
tests/spec/glsl-es-1.00/compiler/invariant.frag
tests/spec/glsl-es-3.00/compiler/invariant.frag
2 files changed, 34 insertions(+)
create mode 100644 tests/glslparsertest/shaders/invariant.V100.frag
create mode 100644 tests/glslparsertest/shaders/invariant.V300.frag
diff --git a/tests/glslparsertest/shaders/invariant.V100.frag
b/tests/glslparsertest/shaders/invariant.V100.frag
new file mode 100644
index 000000000..a6463d1dd
--- /dev/null
+++ b/tests/glslparsertest/shaders/invariant.V100.frag
@@ -0,0 +1,18 @@
+// [config]
+// expect_result: pass
+// glsl_version: 1.00
+//
+// [end config]
+
+/* From Section 4.6.1 ("The Invariant Qualifier") GLSL ES 1.00 spec:
+ *
+ * "Only the following variables may be declared as invariant:
+ * Built-in special variables output from the fragment shader."
+ */
+
+#version 100
+
+invariant gl_FragColor;
+invariant gl_FragData;
+
+void main() { }
diff --git a/tests/glslparsertest/shaders/invariant.V300.frag
b/tests/glslparsertest/shaders/invariant.V300.frag
new file mode 100644
index 000000000..8d7707d8c
--- /dev/null
+++ b/tests/glslparsertest/shaders/invariant.V300.frag
@@ -0,0 +1,16 @@
+// [config]
+// expect_result: pass
+// glsl_version: 3.00
+//
+// [end config]
+
+/* From Section 4.6.1 ("The Invariant Qualifier") GLSL ES 3.00 spec:
+ *
+ * "Only variables output from a shader can be candidates for invariance."
+ */
+
+#version 300 es
+
+invariant out highp vec4 test;
+
+void main() { }
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