Experimental DXR1.0 support in gfx. (#1915)

* Experimental DXR1.0 support in gfx.

- Add `dispatchRays` command.
- Add `createRayTracingPipelineState` method to construct a D3D ray tracing state object from a linked slang program and user specified shader table.

Limitations/simplifications: no local root signature support, shader table entries contains only shader identifiers and is specified at pipeline creation time, owned by the pipeline state object.

* Root object binding for raytracing pipelines.

* `maybeSpecializePipeline` implementation for raytracing pipelines.

* Add ray-tracing-pipeline example.

* Fixes.

* Update README.md

* Update comments on the lifespan of specialized pipelines

Co-authored-by: Yong He <yhe@nvidia.com>
Co-authored-by: jsmall-nvidia <jsmall@nvidia.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/tools/gfx/debug-layer.h b/tools/gfx/debug-layer.h
index 7433db966..c7de48149 100644
--- a/tools/gfx/debug-layer.h
+++ b/tools/gfx/debug-layer.h
@@ -351,6 +351,13 @@ public:
         IAccelerationStructure* const* structures,
         AccessFlag::Enum sourceAccess,
         AccessFlag::Enum destAccess) override;
+    virtual SLANG_NO_THROW void SLANG_MCALL
+        bindPipeline(IPipelineState* state, IShaderObject** outRootObject) override;
+    virtual SLANG_NO_THROW void SLANG_MCALL dispatchRays(
+        const char* rayGenShaderName,
+        int32_t width,
+        int32_t height,
+        int32_t depth) override;
 
 public:
     DebugCommandBuffer* commandBuffer;