New tests to check that an unused input varying, which would be
matched based on its explicit location, won't cause a link failure if
there is no matching output variable.
From the ARB_separate_shader_objects spec v.25:
" * An output variable is considered to match an input variable in
the subequent shader if:
* the two variables match in name, type, and qualification; or
* the two variables are declared with the same location layout
qualifier and match in type and qualification."
...
" For program objects containing multiple shaders, LinkProgram will
check for mismatches on interfaces between shader stages in the
program being linked and generate a link error if a mismatch is
detected. A link error will be generated if any statically
referenced input variable or block does not have a matching
output."
Cc: Timothy Arceri <tarc...@itsqueeze.com>
Cc: Iago Toral Quiroga <ito...@igalia.com>
Cc: Samuel Iglesias Gonsálvez <sigles...@igalia.com>
Cc: Tapani Pälli <tapani.pa...@intel.com>
Cc: Ian Romanick <ian.d.roman...@intel.com>
Signed-off-by: Andres Gomez <ago...@igalia.com>
---
...explicit-location-unused-input.shader_test | 38 +++++++++++++++++++
1 file changed, 38 insertions(+)
create mode 100644
tests/spec/arb_separate_shader_objects/linker/vs-to-fs-explicit-location-unused-input.shader_test
diff --git
a/tests/spec/arb_separate_shader_objects/linker/vs-to-fs-explicit-location-unused-input.shader_test
b/tests/spec/arb_separate_shader_objects/linker/vs-to-fs-explicit-location-unused-input.shader_test
new file mode 100644
index 000000000..c39fd4033
--- /dev/null
+++
b/tests/spec/arb_separate_shader_objects/linker/vs-to-fs-explicit-location-unused-input.shader_test
@@ -0,0 +1,38 @@
+// From the ARB_separate_shader_objects spec v.25:
+//
+// " * An output variable is considered to match an input variable
+// in the subequent shader if:
+//
+// * the two variables match in name, type, and qualification;
+// or
+//
+// * the two variables are declared with the same location
+// layout qualifier and match in type and qualification."
+//
+// ...
+//
+// " For program objects containing multiple shaders, LinkProgram
+// will check for mismatches on interfaces between shader stages
+// in the program being linked and generate a link error if a
+// mismatch is detected. A link error will be generated if any
+// statically referenced input variable or block does not have a
+// matching output."
+
+[require]
+GLSL >= 1.40
+GL_ARB_separate_shader_objects
+
+[vertex shader passthrough]
+
+[fragment shader]
+#version 140
+#extension GL_ARB_separate_shader_objects : require
+
+layout(location = 0) in vec4 in1;
+
+void main()
+{
+}
+
+[test]
+link success
--
2.20.1
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