- Refactord 'Finalized Access' feature into a more flexible 'External' vs. 'Internal' access mode per resource toggle.
- Resources can transition between modes multiple times within the graph.
- Supports async compute pipeline.
- Supports queueing of requests to avoid back-to-back helper passes.
- This feature is needed to support conversion of GPU scene buffers.
- Deprecated the ReadOnly and ForceTracking resource flags and added a 'SkipTracking' flag instead.
- Previous semantics were confusing and error prone.
- New model requires a manual flag to tell RDG never to transition a resource.
- This flag is used for read-only dummy resources as an optimization.
- Renamed some of the auxiliary 'FinalizedResource' utilities since the name no longer matches the semantics.
#preflight 6266cc6d0634d0904ce4ba46
[CL 19904734 by zach bethel in ue5-main branch]
- New RHI command list SetTrackedAccess method for the user to supply a current whole-resource state.
- New RHI command context GetTrackedAccess method for querying the tracked access in RHIBeginTransitions / RHIEndTransitions on the RHI thread.
- Hooked RHICmdList.Transition and FRHICommandListExecutor::Transition to assign tracked state automatically.
- Refactored RDG and resource pools to use new RHI tracking.
- FRDGPooledBuffer / FRDGPooledTexture no longer contain tracked state. RDG temp-allocates state through the graph allocator instead.
- All prologue transitions are 'Unknown', and all epilogue transitions coalesce into a whole resource state.
- Implemented platform support for patching the 'before' state with the tracked state.
- Implemented various RHI validation checks:
- Asserts that the user assigned tracked state matches RHI validation tracked state, for all subresources.
- Asserts that tracked state is not assigned or queried from a parallel translation context.
- Added FRHIViewableResource and FRHIView base classes to RHI. FRHIView contains a pointer to an FRHIViewableResource. This is currently a raw pointer, but should be extended to a full reference in a later CL.
NOTE on RHI thread constraint:
Transition evaluation is now restricted to the RHI thread (i.e. no parallel translation contexts). Transitions aren't performed in parallel translate contexts anyway, so this is not a problem. If, however, we decide to refactor parallel translation to be more general, this implementation could be extended to track the state per context and update from the 'dispatch' thread.
#preflight 6233b4396666d7e753a16aaf
#rb kenzo.terelst
[CL 19513316 by zach bethel in ue5-main branch]
- Deprecated legacy members from FPooledRenderTargetDesc.
- Deprecated ETextureRenderTarget and removed from RDG.
- TargetableTexture always equals ShaderResourceTexture.
- Simplified render target pool FindFreeElement.
- Create pooled buffers and textures with a known state.
#rb graham.wihlidal
#preflight 61f8488568795b2f45852274
#ROBOMERGE-AUTHOR: zach.bethel
#ROBOMERGE-SOURCE: CL 18796880 in //UE5/Release-5.0/... via CL 18797840 via CL 18799070
#ROBOMERGE-BOT: UE5 (Release-Engine-Test -> Main) (v908-18788545)
[CL 18799188 by zach bethel in ue5-main branch]
* Added single-callback version of CreateStructuredBuffer to automatically infer element size, total size, element count and data pointer (e.g. CreateStructuredBuffer(GraphBuilder, TEXT("MyBuffer"), [&]() -> auto& { return BufferSource; });, where BufferSource is a TArray)
* Added support for uint2 shader parameters
* Added ForceTracking flag to ERDGBufferFlags/ERDGTextureFlags : force the RDG to track a resource even if it can be considered as readonly (no UAV, no RTV, etc.) This allows the graph to copy from and to external textures, and handling the corresponding transitions, for example.
#rb zach.bethel, sebastien.lussier
#tests editor
#preflight 61d8bc681f62d3ad4d728095
#ROBOMERGE-OWNER: jonathan.bard
#ROBOMERGE-AUTHOR: jonathan.bard
#ROBOMERGE-SOURCE: CL 18595021 via CL 18595031 via CL 18595035 via CL 18595668 via CL 18595682 via CL 18595700
#ROBOMERGE-BOT: STARSHIP (Release-Engine-Test -> Main) (v899-18417669)
[CL 18596726 by jonathan bard in ue5-main branch]
- Implemented common transient page allocator in RHICore.
- Implemented XBox specific GPU page table mapping allocator.
- Extended RDG insights to support viewing heap visualization or page pool visualization.
#preflight 61d356682e0e436c725818bf
[CL 18504626 by zach bethel in ue5-main branch]
- 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
#ROBOMERGE-SOURCE: CL 16838717 in //UE5/Main/...
#ROBOMERGE-BOT: STARSHIP (Main -> Release-Engine-Test) (v836-16769935)
[CL 16838724 by zach bethel in ue5-release-engine-test branch]
- 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]
