- Refactored RDG to support free-threaded execution of passes.
- Refactored renderer to use specific RHI command list variants in pass lambda. Immediate command list passes are forced to stay on the render thread, while other variants can be parallelized.
#rb christopher.waters
[CL 16838717 by zach bethel in ue5-main branch]
- New Drain() method on FRDGBuilder; will flush all pending work.
- Drained passes are not culled; resource lifetimes are extended; async compute fences are optimized as best as possible but fence joining may occur after the drain.
- Batch up and pre-build all resource transitions. This is a prerequisite for parallel command lists.
- Removed ServiceLocalQueue passes with built-in RDG AddDispatchHint().
#jira UE-114622
[CL 16393495 by zach bethel in ue5-main branch]
- Simplified texture subresource tracking.
- Removed map lookup for each resource in SetupPass.
- Improved Compile / CollectPassResources to reduce cache misses.
- Added some container reservations to reduce reallocation costs.
- Added snapping of buffers to page boundaries to improve re-use.
#rb none
[CL 16208311 by zach bethel in ue5-main branch]
- Replaced legacy transient support from RDG and replaced with new API.
- Reworked acquire / discard operations a bit and added RHI validation to track correctness.
- Reworked RDG barrier batching to include acquire / discard operations.
- Hardened render pass merging logic and expanded to support lifetime extension of transient resources.
- Added transient tag to RDG insights to track which resources are transient.
#rb luke.thatcher, kenzo.terelst
[CL 15726534 by zach bethel in ue5-main branch]
- This function calls FRDGBuilder::PreallocateX, which sets bExternal to true.
- Culling relies on bUntrackedOutputs to mark passes with external resources as root nodes in the culling traversal.
- bUntrackedOutputs was being assigned during AddPass instead of during Compile.
#rb krzysztof.narkowicz
#jira none
[CL 14412855 by zach bethel in ue5-main branch]
#rnx
#rb none
#ROBOMERGE-OWNER: ryan.durand
#ROBOMERGE-AUTHOR: ryan.durand
#ROBOMERGE-SOURCE: CL 10869210 via CL 10869511 via CL 10869900
#ROBOMERGE-BOT: (v613-10869866)
[CL 10870549 by ryan durand in Main branch]
- Resource barriers are now batched and submitted as a group at the beginning of a pass.
- UAVs referencing the same underlying resource now only submit a single write barrier instead of a write + N UAV barriers.
- During a mip generation pass, barriers are not issued for textures (they are implicitly converted to the SubRWBarrier state).
- Depth / stencil read now transitions to the read state; this allows DSV + SRV to work correctly.
#jira UE-76196
#rb Guillaume.Abadie
[CL 7064877 by zach bethel in Main branch]
