[Piglit] [PATCH 3/4] arb_fragment_layer_viewport: Add tests for not-written cases

[Chris Forbes]

Signed-off-by: Chris Forbes <chrisf at ijw.co.nz>
---
 tests/all.py                                       |  6 +++
 .../layer-gs-no-write.shader_test                  | 51 ++++++++++++++++++++++
 .../layer-no-gs.shader_test                        | 37 ++++++++++++++++
 .../viewport-gs-no-write.shader_test               | 51 ++++++++++++++++++++++
 .../viewport-no-gs.shader_test                     | 37 ++++++++++++++++
 5 files changed, 182 insertions(+)
 create mode 100644 tests/spec/arb_fragment_layer_viewport/layer-gs-no-write.shader_test
 create mode 100644 tests/spec/arb_fragment_layer_viewport/layer-no-gs.shader_test
 create mode 100644 tests/spec/arb_fragment_layer_viewport/viewport-gs-no-write.shader_test
 create mode 100644 tests/spec/arb_fragment_layer_viewport/viewport-no-gs.shader_test

diff --git a/tests/all.py b/tests/all.py
index f9f1125..39fca0e 100644
--- a/tests/all.py
+++ b/tests/all.py
@@ -1569,6 +1569,12 @@ import_glsl_parser_tests(arb_fragment_coord_conventions,
                                       'arb_fragment_coord_conventions'),
                          ['compiler'])
 
+arb_fragment_layer_viewport = {}
+spec['ARB_fragment_layer_viewport'] = arb_fragment_layer_viewport
+add_shader_test_dir(arb_fragment_layer_viewport,
+                    os.path.join(testsDir, 'spec', 'arb_fragment_layer_viewport'),
+                    recursive=True)
+
 ati_fragment_shader = {}
 spec['ATI_fragment_shader'] = ati_fragment_shader
 add_plain_test(ati_fragment_shader, 'ati-fs-bad-delete')
diff --git a/tests/spec/arb_fragment_layer_viewport/layer-gs-no-write.shader_test b/tests/spec/arb_fragment_layer_viewport/layer-gs-no-write.shader_test
new file mode 100644
index 0000000..37de834
--- /dev/null
+++ b/tests/spec/arb_fragment_layer_viewport/layer-gs-no-write.shader_test
@@ -0,0 +1,51 @@
+[require]
+GLSL >= 1.50
+GL_ARB_fragment_layer_viewport
+
+#
+# If the geometry stage makes no static assignment to gl_Layer,
+# the fragment stage will read zero.
+#
+# This test covers the case where a GS is present, but does not write gl_Layer.
+#
+
+[vertex shader]
+#version 150
+in vec4 piglit_vertex;
+
+void main()
+{
+	gl_Position = piglit_vertex;
+}
+
+[geometry shader]
+#version 150
+
+layout(triangles) in;
+layout(triangle_strip, max_vertices=3) out;
+
+void main()
+{
+	for (int i = 0; i < 3; i++) {
+		gl_Position = gl_in[i].gl_Position;
+		EmitVertex();
+	}
+}
+
+[fragment shader]
+#version 150
+#extension GL_ARB_fragment_layer_viewport: require
+
+void main()
+{
+	if (gl_Layer == 0)
+		gl_FragColor = vec4(0,1,0,0);
+	else
+		gl_FragColor = vec4(1,0,0,0);
+}
+
+[test]
+clear color 0.0 0.0 0.0 0.0
+clear
+draw rect -1 -1 2 2
+probe all rgb 0.0 1.0 0.0
diff --git a/tests/spec/arb_fragment_layer_viewport/layer-no-gs.shader_test b/tests/spec/arb_fragment_layer_viewport/layer-no-gs.shader_test
new file mode 100644
index 0000000..504e954
--- /dev/null
+++ b/tests/spec/arb_fragment_layer_viewport/layer-no-gs.shader_test
@@ -0,0 +1,37 @@
+[require]
+GLSL >= 1.50
+GL_ARB_fragment_layer_viewport
+
+#
+# If the geometry stage makes no static assignment to gl_Layer,
+# the fragment stage will read zero.
+#
+# This test covers the case where there is no GS present at all.
+#
+
+[vertex shader]
+#version 150
+in vec4 piglit_vertex;
+
+void main()
+{
+	gl_Position = piglit_vertex;
+}
+
+[fragment shader]
+#version 150
+#extension GL_ARB_fragment_layer_viewport: require
+
+void main()
+{
+	if (gl_Layer == 0)
+		gl_FragColor = vec4(0,1,0,0);
+	else
+		gl_FragColor = vec4(1,0,0,0);
+}
+
+[test]
+clear color 0.0 0.0 0.0 0.0
+clear
+draw rect -1 -1 2 2
+probe all rgb 0.0 1.0 0.0
diff --git a/tests/spec/arb_fragment_layer_viewport/viewport-gs-no-write.shader_test b/tests/spec/arb_fragment_layer_viewport/viewport-gs-no-write.shader_test
new file mode 100644
index 0000000..6902195
--- /dev/null
+++ b/tests/spec/arb_fragment_layer_viewport/viewport-gs-no-write.shader_test
@@ -0,0 +1,51 @@
+[require]
+GLSL >= 1.50
+GL_ARB_fragment_layer_viewport
+
+#
+# If the geometry stage makes no static assignment to gl_ViewportIndex,
+# the fragment stage will read zero.
+#
+# This test covers the case where a GS is present, but does not write gl_ViewportIndex.
+#
+
+[vertex shader]
+#version 150
+in vec4 piglit_vertex;
+
+void main()
+{
+	gl_Position = piglit_vertex;
+}
+
+[geometry shader]
+#version 150
+
+layout(triangles) in;
+layout(triangle_strip, max_vertices=3) out;
+
+void main()
+{
+	for (int i = 0; i < 3; i++) {
+		gl_Position = gl_in[i].gl_Position;
+		EmitVertex();
+	}
+}
+
+[fragment shader]
+#version 150
+#extension GL_ARB_fragment_layer_viewport: require
+
+void main()
+{
+	if (gl_ViewportIndex == 0)
+		gl_FragColor = vec4(0,1,0,0);
+	else
+		gl_FragColor = vec4(1,0,0,0);
+}
+
+[test]
+clear color 0.0 0.0 0.0 0.0
+clear
+draw rect -1 -1 2 2
+probe all rgb 0.0 1.0 0.0
diff --git a/tests/spec/arb_fragment_layer_viewport/viewport-no-gs.shader_test b/tests/spec/arb_fragment_layer_viewport/viewport-no-gs.shader_test
new file mode 100644
index 0000000..4ac5e09
--- /dev/null
+++ b/tests/spec/arb_fragment_layer_viewport/viewport-no-gs.shader_test
@@ -0,0 +1,37 @@
+[require]
+GLSL >= 1.50
+GL_ARB_fragment_layer_viewport
+
+#
+# If the geometry stage makes no static assignment to gl_ViewportIndex,
+# the fragment stage will read zero.
+#
+# This test covers the case where there is no GS present at all.
+#
+
+[vertex shader]
+#version 150
+in vec4 piglit_vertex;
+
+void main()
+{
+	gl_Position = piglit_vertex;
+}
+
+[fragment shader]
+#version 150
+#extension GL_ARB_fragment_layer_viewport: require
+
+void main()
+{
+	if (gl_ViewportIndex == 0)
+		gl_FragColor = vec4(0,1,0,0);
+	else
+		gl_FragColor = vec4(1,0,0,0);
+}
+
+[test]
+clear color 0.0 0.0 0.0 0.0
+clear
+draw rect -1 -1 2 2
+probe all rgb 0.0 1.0 0.0
-- 
2.0.0