[PATCH 2/7] tests: Test packoffset().

[Francisco Casas]

From: Francisco Casas

---
 tests/cbuffer.shader_test | 232 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 232 insertions(+)

diff --git a/tests/cbuffer.shader_test b/tests/cbuffer.shader_test
index b0e8015d..d89ababd 100644
--- a/tests/cbuffer.shader_test
+++ b/tests/cbuffer.shader_test
@@ -93,3 +93,235 @@ uniform 12 float4 12.0 13.0 14.0 15.0
 draw quad
 probe all rgba (0.0, 4.0, 5.0, 6.0)

+
+[pixel shader fail]
+// Elements cannot overlap if buffer is used.
+cbuffer buffer
+{
+    float c : packoffset(c0);
+    float4 a[2] : packoffset(c1);
+    float4 b[2] : packoffset(c2);
+}
+
+float4 main() : sv_target
+{
+    return c;
+}
+
+
+[pixel shader todo]
+// Elements can overlap if buffer is not used.
+cbuffer buffer
+{
+    float4 a[2] : packoffset(c1);
+    float4 b[2] : packoffset(c2);
+}
+
+float4 main() : sv_target
+{
+    return 0;
+}
+
+
+[pixel shader todo]
+cbuffer buffer
+{
+    float4 a : packoffset(c1);
+    float4 b : packoffset(c2);
+}
+
+float4 main() : sv_target
+{
+    return 100 * a + b;
+}
+
+[test]
+uniform 0 float4 1.0 2.0 3.0 4.0
+uniform 4 float4 5.0 6.0 7.0 8.0
+uniform 8 float4 9.0 10.0 11.0 12.0
+todo draw quad
+todo probe all rgba (509, 610, 711, 812)
+
+
+[pixel shader todo]
+cbuffer buffer
+{
+    float2 c : packoffset(c0.y);
+}
+
+float4 main() : sv_target
+{
+    return float4(c, c);
+}
+
+[test]
+uniform 0 float4 1.0 2.0 3.0 4.0
+todo draw quad
+todo probe all rgba (2.0, 3.0, 2.0, 3.0)
+
+
+[pixel shader fail]
+// Elements must respect register boundaries
+cbuffer buffer
+{
+    float4 c : packoffset(c0.z);
+}
+
+float4 main() : sv_target
+{
+    return c;
+}
+
+
+[pixel shader todo]
+cbuffer buffer
+{
+    float4 a : packoffset(c1);
+    float1 b : packoffset(c0);
+    float1 c : packoffset(c0.y);
+}
+
+float4 main() : sv_target
+{
+    return 100 * a + 10 * b + c;
+}
+
+[test]
+uniform 0 float 1.0
+uniform 1 float 2.0
+uniform 4 float4 5.0 6.0 7.0 8.0
+todo draw quad
+todo probe all rgba (512.0, 612.0, 712.0, 812.0)
+
+
+[pixel shader fail]
+// packoffset cannot be used unless all elements use it.
+cbuffer buffer
+{
+    float4 a : packoffset(c0);
+    float4 b;
+}
+
+float4 main() : sv_target
+{
+    return a + b;
+}
+
+
+[pixel shader todo]
+cbuffer buffer
+{
+    float2 c : packoffset(c0.b);
+}
+
+float4 main() : sv_target
+{
+    return float4(c, c);
+}
+
+[test]
+uniform 0 float4 1.0 2.0 3.0 4.0
+todo draw quad
+todo probe all rgba (3.0, 4.0, 3.0, 4.0)
+
+
+[pixel shader fail]
+cbuffer buffer
+{
+    float2 c : packoffset(c0.xy);
+}
+
+float4 main() : sv_target
+{
+    return 0;
+}
+
+
+[pixel shader fail]
+cbuffer buffer
+{
+    float2 c : packoffset(c0.xz);
+}
+
+float4 main() : sv_target
+{
+    return 0;
+}
+
+
+[pixel shader fail]
+// packoffset cannot be used outside a constant buffer.
+float4 a : packoffset(c0);
+
+float4 main() : sv_target
+{
+    return 0;
+}
+
+
+[pixel shader fail]
+float4 foo(float4 a : packoffset(c0))
+{
+    return a;
+}
+
+float4 main() : sv_target
+{
+    return 0;
+}
+
+[pixel shader fail]
+float4 foo(float4 a) : packoffset(c0)
+{
+    return a;
+}
+
+float4 main() : sv_target
+{
+    return 0;
+}
+
+
+[texture 0]
+size (1, 1)
+0.0 0.0 0.0 4.0
+
+[sampler 0]
+filter linear linear linear
+address clamp clamp clamp
+
+
+[pixel shader]
+// Resources are allowed inside constant buffers but they behave as regular resources.
+cbuffer buffer
+{
+    float4 a;
+    Texture2D tex;
+    sampler sam;
+    float4 b;
+}
+
+float4 main() : sv_target
+{
+    return a + b + tex.Sample(sam, float2(0, 0));
+}
+
+[test]
+uniform 0 float4 1.0 0.0 0.0 0.0
+uniform 4 float4 0.0 2.0 0.0 0.0
+uniform 8 float4 0.0 0.0 3.0 0.0
+draw quad
+probe all rgba (1.0, 2.0, 0.0, 4.0)
+
+
+[pixel shader fail]
+cbuffer buffer
+{
+    float4 a : packoffset(c0);
+    Texture2D tex;
+}
+
+float4 main() : sv_target
+{
+    return a + tex.Load(int3(0, 0 ,0));
+}