Enum GraphResourceClass 

pub enum GraphResourceClass {
    ColorTarget,
    DepthTarget,
    StorageImage,
    IndirectBuffer,
    StorageBuffer,
    UnorderedBuffer,
}

How a graph resource a backend drives from barriers_before is used, so the backend can translate the coarse ResourceState into a concrete native state: the same Write means a colour render target for one resource and a depth-stencil target for another, which map to different D3D12_RESOURCE_STATES / vk::ImageLayouts. The backend resolver assigns a class to each migrated resource; the backend’s barrier translator maps (class, state) to its native state. Extend as resources of new kinds (storage / compute targets, …) migrate.

Variants

ColorTarget

Sampled colour render target (e.g. the SSAO occlusion ao_output).

DepthTarget

Sampled depth-stencil render target (e.g. the CSM shadow_map).

StorageImage

Compute-written, shader-sampled storage image (e.g. the volumetric-fog fog_froxel_volume): a compute pass writes it (DirectX UNORDERED_ACCESS / Vulkan GENERAL) and a later fragment pass samples it. Unlike the two target classes its Write happens in the compute stage, so the translated state pairs a storage-write layout with the compute pipeline stage.

IndirectBuffer

Compute-written buffer consumed as draw arguments (e.g. the GPU cull pass’s draw_args): a compute pass writes it and the drawing pass reads it through the indirect-draw stage, which is neither of the shader stages ReadStages models. Buffers carry no layout, so a transition on this class is a pure execution + memory dependency.

StorageBuffer

Compute-written, shader-read buffer (e.g. the clustered-lighting cluster_light_list). Like IndirectBuffer it has no layout; its read side follows the consuming stage union, so it reads as a shader resource.

UnorderedBuffer

Buffer both written and read through an unordered-access view (e.g. the two-pass cull’s cull_status, which phase 1 writes and phase 2 reads with the same binding). Distinct from StorageBuffer because its read is not a shader-resource read: on DirectX it never leaves UNORDERED_ACCESS, so its ordering comes from a UAV barrier rather than a state transition.

Implementations

impl GraphResourceClass

pub const fn is_buffer(self) -> bool

Whether this class names a buffer rather than an image. Buffers have no layout, so a backend emits a buffer / global memory barrier for them and an image barrier for everything else.

Trait Implementations

impl Clone for GraphResourceClass

fn clone(&self) -> GraphResourceClass

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for GraphResourceClass

impl Debug for GraphResourceClass

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Eq for GraphResourceClass

impl PartialEq for GraphResourceClass

fn eq(&self, other: &GraphResourceClass) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for GraphResourceClass