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, 8 insertions, 0 deletions

diff --git a/tools/gfx/renderer-shared.cpp b/tools/gfx/renderer-shared.cpp
index 2eb19b6e9..bb80c4f53 100644
--- a/tools/gfx/renderer-shared.cpp
+++ b/tools/gfx/renderer-shared.cpp
@@ -605,6 +605,14 @@ Result RendererBase::maybeSpecializePipeline(
                     pipelineDesc, specializedPipelineComPtr.writeRef()));
                 break;
             }
+            case PipelineType::RayTracing:
+            {
+                auto pipelineDesc = currentPipeline->desc.rayTracing;
+                pipelineDesc.program = specializedProgram;
+                SLANG_RETURN_ON_FAIL(createRayTracingPipelineState(
+                    pipelineDesc, specializedPipelineComPtr.writeRef()));
+                break;
+            }
             default:
                 break;
             }