[Piglit] [PATCH] arb_shader_storage_buffer_object: Test copying a large SSBO item

[Jordan Justen]

Signed-off-by: Jordan Justen <jordan.l.justen at intel.com>
Cc: Kristian Høgsberg <krh at bitplanet.net>
Cc: Samuel Iglesias Gonsalvez <siglesias at igalia.com>
Cc: Iago Toral Quiroga <itoral at igalia.com>
---
 This fails to link on i965.

 .../execution/large-field-copy.shader_test         | 66 ++++++++++++++++++++++
 1 file changed, 66 insertions(+)
 create mode 100644 tests/spec/arb_shader_storage_buffer_object/execution/large-field-copy.shader_test

diff --git a/tests/spec/arb_shader_storage_buffer_object/execution/large-field-copy.shader_test b/tests/spec/arb_shader_storage_buffer_object/execution/large-field-copy.shader_test
new file mode 100644
index 0000000..a949507
--- /dev/null
+++ b/tests/spec/arb_shader_storage_buffer_object/execution/large-field-copy.shader_test
@@ -0,0 +1,66 @@
+# Test that a 'large' field of an SSBO can be copied.
+
+[require]
+GL >= 3.3
+GLSL >= 3.30
+GL_ARB_shader_storage_buffer_object
+
+[vertex shader passthrough]
+
+[fragment shader]
+#version 330
+#extension GL_ARB_shader_storage_buffer_object: require
+
+#define SIZE 16
+
+layout (std430) buffer SSBO {
+    mat4 m1[SIZE];
+    mat4 m2[SIZE];
+};
+
+out vec4 color;
+
+uniform uint mode;
+
+void main() {
+    bool pass = true;
+    int i;
+
+    switch (mode) {
+    case 0u:
+        for (i = 0; i < SIZE; i++) {
+	    m1[i] = mat4(vec4(i + 0), vec4(i + 1),
+	                 vec4(i + 2), vec4(i + 3));
+	}
+	break;
+    case 1u:
+        m2 = m1;
+	break;
+    case 2u:
+        for (i = 0; i < SIZE; i++) {
+	    pass = pass && (m2[i] == mat4(vec4(i + 0), vec4(i + 1),
+	                                  vec4(i + 2), vec4(i + 3)));
+	}
+	break;
+    }
+
+    if (pass)
+        color = vec4(0.0, 1.0, 0.0, 1.0);
+    else
+        color = vec4(1.0, 0.0, 0.0, 1.0);
+}
+
+[test]
+ssbo 2048
+
+uniform uint mode 0
+draw rect -1 -1 2 2
+probe all rgba 0.0 1.0 0.0 1.0
+
+uniform uint mode 1
+draw rect -1 -1 2 2
+probe all rgba 0.0 1.0 0.0 1.0
+
+uniform uint mode 2
+draw rect -1 -1 2 2
+probe all rgba 0.0 1.0 0.0 1.0
-- 
2.6.2