[Piglit] [PATCH 1/3] arb_vertex_attrib_64bit: add simple vertex input fp64 test

[Dave Airlie]

From: Dave Airlie <airlied at redhat.com>

This is just a simple 64-bit vertex attrib test.

Signed-off-by: Dave Airlie <airlied at redhat.com>
---
 .../execution/vs-fp64-input-trunc.shader_test      | 42 ++++++++++++++++++++++
 1 file changed, 42 insertions(+)
 create mode 100644 tests/spec/arb_vertex_attrib_64bit/execution/vs-fp64-input-trunc.shader_test

diff --git a/tests/spec/arb_vertex_attrib_64bit/execution/vs-fp64-input-trunc.shader_test b/tests/spec/arb_vertex_attrib_64bit/execution/vs-fp64-input-trunc.shader_test
new file mode 100644
index 0000000..9fb3e4f
--- /dev/null
+++ b/tests/spec/arb_vertex_attrib_64bit/execution/vs-fp64-input-trunc.shader_test
@@ -0,0 +1,42 @@
+# test truncating a double holds precision
+[require]
+GLSL >= 1.50
+GL_ARB_gpu_shader_fp64
+GL_ARB_vertex_attrib_64bit
+
+[vertex shader]
+#version 150
+#extension GL_ARB_gpu_shader_fp64 : require
+#extension GL_ARB_vertex_attrib_64bit : require
+in dvec4 vertex;
+void main()
+{
+        gl_Position = vec4(vertex);
+}
+
+[fragment shader]
+#version 150
+#extension GL_ARB_gpu_shader_fp64 : require
+uniform double arg0;
+uniform double tolerance;
+uniform double expected;
+
+void main()
+{
+  double result = trunc(arg0);
+  gl_FragColor = distance(result, expected) <= tolerance ? vec4(0.0, 1.0, 0.0, 1.0) : vec4(1.0, 0.0, 0.0, 1.0);
+}
+
+[vertex data]
+vertex/double/2
+-1.0 -1.0
+ 1.0 -1.0
+ 1.0  1.0
+-1.0  1.0
+
+[test]
+uniform double arg0 1.7976931348623157E+308
+uniform double expected 1.7976931348623157E+308
+uniform double tolerance 2.0000000000000002e-05
+draw arrays GL_TRIANGLE_FAN 0 4
+probe rgba 0 0 0.0 1.0 0.0 1.0
-- 
1.9.3