Texture Sample available in CUDA (#1176)

* WIP: Trying to figure out how texturing will work with CUDA.

* WIP: Fixes for CUDA layout. Initial CUDA texture test.

* WIP: Outputs something compilable by CUDA for TextureND.Sample

* 2d texture working with CUDA.

* Fix how binding for SamplerState occurs in CUDA.

* Small tidy up of comments.

1 files changed, 11 insertions, 0 deletions

diff --git a/prelude/slang-cuda-prelude.h b/prelude/slang-cuda-prelude.h
index f78814486..28e423b31 100644
--- a/prelude/slang-cuda-prelude.h
+++ b/prelude/slang-cuda-prelude.h
@@ -19,6 +19,17 @@ struct FixedArray
     T m_data[SIZE];
 };
 
+// Typically defined in cuda.h, but we can't ship/rely on that, so just define here
+typedef unsigned long long CUtexObject;                   
+typedef unsigned long long CUsurfObject;                  
+
+// On CUDA sampler state is actually bound up with the texture object. We have a SamplerState type, 
+// backed as a pointer, to simplify code generation, with the downside that such a binding will take up 
+// uniform space, even though it will have no effect. 
+// TODO(JS): Consider ways to strip use of variables of this type so have no binding,
+struct SamplerStateUnused;
+typedef SamplerStateUnused* SamplerState;
+
 // Code generator will generate the specific type
 template <typename T, int ROWS, int COLS>
 struct Matrix;