EXT_separate_shader_objects: add redeclare built-in variable test

Signed-off-by: cheyang <cheyang@bytedance.com>
Reviewed-by: Tapani Pälli <tapani.palli@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/piglit/-/merge_requests/438>

1 files changed, 31 insertions, 0 deletions

diff --git a/tests/spec/ext_separate_shader_objects/compiler/3.00/redeclare_built-in_variable.vert b/tests/spec/ext_separate_shader_objects/compiler/3.00/redeclare_built-in_variable.vert
new file mode 100644
index 000000000..597d4a9fe
--- /dev/null
+++ b/tests/spec/ext_separate_shader_objects/compiler/3.00/redeclare_built-in_variable.vert
@@ -0,0 +1,31 @@
+// [config]
+// expect_result: pass
+// glsl_version: 3.00
+// require_extensions: EXT_separate_shader_objects
+// [end config]
+//
+// From the EXT_separate_shader_objects:
+//
+// "The following vertex shader outputs may be redeclared
+//  at global scope to specify a built-in output interface,
+//  with or without special qualifiers:
+//
+//  gl_Position
+//  gl_PointSize
+//
+//  When compiling shaders using either of the above variables,
+//  both such variables must be redeclared prior to use."
+
+#version 300 es
+#extension GL_EXT_separate_shader_objects : require
+layout (location = 0) in vec3 aPos;
+out highp vec4 gl_Position;
+out highp float gl_PointSize;
+out vec4 vertexColor;
+
+void main()
+{
+    gl_Position = vec4(aPos, 1.0);
+    gl_PointSize = gl_Position.x;
+    vertexColor = vec4(0.5, 0.0, 0.0, 1.0);
+}