Information available for each member include the name, C++ type, HLSL type, and byte offset. This metadata enables runtime traversal of the struct, which is necessary to dynamically bind parameters to the RHI. These macros generate an equivalent flat C++ data structure along with compile-time reflection metadata, which is accessible as a static member of the struct.Ĭompile-Time Reflection Metadata: const FShaderParametersMetadata* ParameterMetadata = FMyShaderParameters::FTypeInfo::GetStructMetadata() SHADER_PARAMETER_UAV(RWTexture2D, SceneColorOutput) SHADER_PARAMETER_SAMPLER(SamplerState, SceneColorSampler) SHADER_PARAMETER_TEXTURE(Texture2D, SceneColorTexture) SHADER_PARAMETER_SAMPLER(SamplerState, BlueNoiseSampler) SHADER_PARAMETER_TEXTURE(Texture2D, BlueNoiseTexture) SHADER_PARAMETER_ARRAY(FVector, FooBarArray, ) SHADER_PARAMETER(FVector2D, ViewportSize) Shader Parameter Structs: BEGIN_SHADER_PARAMETER_STRUCT(FMyShaderParameters, /** MODULE_API_TAG */) The shader parameters struct system employs a set of declaration macros to achieve this. These shader parameters can also be represented by a flat C++ data structure.Īn ideal C++ Equivalent: struct FMyShaderParametersįRHISamplerState* BlueNoiseSampler = nullptr įRHITexture* SceneColorTexture = nullptr įRHISamplerState* SceneColorSampler = nullptr įRHIUnorderedAccessView* SceneColorOutput = nullptr Shader Inputs in an HLSL Source File: float2 ViewportSize Visualization of the graph structure and memory lifetimes in RDG InsightsĬonsider the following shader parameters declared in an HLSL source file. Validation of API usage and resource dependencies

Transitioning of sub-resources using split-barriers to hide latency and improve overlap on the GPUĬulling of unused resources and passes in the graph

Scheduling of asynchronous compute fencesĪllocation of transient resources with optimal lifetimes and memory aliasing Render Dependency Graph includes the following features: RDG simplifies high level rendering code by automating error-prone operations, and traverses the graph to optimize memory usage and parallelize render passes on the CPU and GPU. The Render Dependency Graph, also called Render Graph or RDG, is an immediate-mode application programming interface (API) which records render commands into a graph data structure to be compiled and executed.

Pso point of free material slots