Add some tests of source modifiers on VS attributes.

I managed to drop them in the i965 VS backend.

2 files changed, 52 insertions, 0 deletions

diff --git a/tests/shaders/glsl-vs-abs-attribute.shader_test b/tests/shaders/glsl-vs-abs-attribute.shader_test
new file mode 100644
index 000000000..89cce21f7
--- /dev/null
+++ b/tests/shaders/glsl-vs-abs-attribute.shader_test
@@ -0,0 +1,26 @@
+[require]
+GLSL >= 1.10
+
+[vertex shader]
+varying vec4 color;
+
+void main()
+{
+        gl_Position = gl_Vertex;
+	if (abs(gl_Vertex).x < 0.0)
+		color = vec4(1.0, 0.0, 0.0, 0.0);
+	else
+		color = vec4(0.0, 1.0, 0.0, 0.0);
+}
+
+[fragment shader]
+varying vec4 color;
+
+void main()
+{
+        gl_FragColor = color;
+}
+
+[test]
+draw rect -1 -1 2 2
+probe all rgba 0.0 1.0 0.0 0.0
diff --git a/tests/shaders/glsl-vs-neg-attribute.shader_test b/tests/shaders/glsl-vs-neg-attribute.shader_test
new file mode 100644
index 000000000..db2c4669d
--- /dev/null
+++ b/tests/shaders/glsl-vs-neg-attribute.shader_test
@@ -0,0 +1,26 @@
+[require]
+GLSL >= 1.10
+
+[vertex shader]
+varying vec4 color;
+
+void main()
+{
+        gl_Position = gl_Vertex;
+	color = -gl_Vertex;
+}
+
+[fragment shader]
+varying vec4 color;
+
+void main()
+{
+        gl_FragColor = color;
+}
+
+[test]
+draw rect -1 -1 2 2
+relative probe rgba (0.0, 0.0) (1.0, 1.0, 0.0, 0.0)
+relative probe rgba (1.0, 0.0) (0.0, 1.0, 0.0, 0.0)
+relative probe rgba (0.0, 1.0) (1.0, 0.0, 0.0, 0.0)
+relative probe rgba (1.0, 1.0) (0.0, 0.0, 0.0, 0.0)