webgpu sponza

interfaces/Crafter.Graphics-PipelineRTWebGPU.cppm

@@ -26,22 +26,31 @@ import std;
 import :RT;
 import :WebGPU;
 import :ShaderBindingTableWebGPU;
+import :WebGPUComputeShader;
 
 export namespace Crafter {
     class PipelineRTWebGPU {
     public:
         std::uint32_t pipelineHandle = 0;
+        // Mirror of the bindings handed to Init. Kept for the example /
+        // RTPass to consult when packing the handles[] array at dispatch
+        // time (one resolved u32 handle per binding, in declaration order).
+        std::vector<UICustomBinding> userBindings;
 
         // 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.
+        // `userBindings` declares extra @group(2)+ resources the user's
+        // closest-hit / miss / raygen WGSL touches (material SSBOs,
+        // albedo textures, samplers).
         void Init(WebGPUCommandEncoderRef                 cmd,
                   std::span<const RTShaderGroup>          raygenGroups,
                   std::span<const RTShaderGroup>          missGroups,
                   std::span<const RTShaderGroup>          hitGroups,
-                  const ShaderBindingTableWebGPU&         sbt);
+                  const ShaderBindingTableWebGPU&         sbt,
+                  std::span<const UICustomBinding>        bindings = {});
 
         PipelineRTWebGPU() = default;
         PipelineRTWebGPU(const PipelineRTWebGPU&) = delete;