webgpu triangle

interfaces/Crafter.Graphics-PipelineRTWebGPU.cppm

@@ -0,0 +1,51 @@
+/*
+Crafter®.Graphics
+Copyright (C) 2026 Catcrafts®
+catcrafts.net
+*/
+
+// DOM-mode RT pipeline. Mirrors PipelineRTVulkan's surface — Init takes
+// the same kind of (raygen, miss, hit) shader-group spans plus an SBT.
+// The big difference is implementation: there's no native RT pipeline on
+// WebGPU, so Init assembles a single megakernel WGSL by concatenating
+//   1. library prelude (types, bindings, ray-flag constants)
+//   2. user closesthit / anyhit / miss source files
+//   3. library mega-switches dispatched on per-hit hit-group index
+//   4. library helpers (rayAabb / rayTriangle / traverseBlas / traverseTlas)
+//   5. library traceRay function
+//   6. user raygen source files
+//   7. @compute entry calling the registered raygen
+// and hands the result to wgpuLoadRTPipeline.
+//
+// The library WGSL itself lives in additional/dom-webgpu.js (rtWgslPrelude
+// + rtWgslDispatchTemplate). C++ side only knows the substitution markers.
+
+export module Crafter.Graphics:PipelineRTWebGPU;
+#ifdef CRAFTER_GRAPHICS_WINDOW_DOM
+import std;
+import :RT;
+import :WebGPU;
+import :ShaderBindingTableWebGPU;
+
+export namespace Crafter {
+    class PipelineRTWebGPU {
+    public:
+        std::uint32_t pipelineHandle = 0;
+
+        // Build the megakernel pipeline. Groups carry indices into
+        // `sbt.shaders`. The library generates one `case` per registered
+        // group: closest-hit groups dispatch to their closestHitShader's
+        // entryFn, miss groups to their generalShader's entryFn, etc.
+        // The `cmd` parameter is unused on WebGPU; kept for API symmetry.
+        void Init(WebGPUCommandEncoderRef                 cmd,
+                  std::span<const RTShaderGroup>          raygenGroups,
+                  std::span<const RTShaderGroup>          missGroups,
+                  std::span<const RTShaderGroup>          hitGroups,
+                  const ShaderBindingTableWebGPU&         sbt);
+
+        PipelineRTWebGPU() = default;
+        PipelineRTWebGPU(const PipelineRTWebGPU&) = delete;
+        PipelineRTWebGPU& operator=(const PipelineRTWebGPU&) = delete;
+    };
+}
+#endif // CRAFTER_GRAPHICS_WINDOW_DOM