Description

A D3D12DDI_BARRIER_LAYOUT value describes the possible layouts used by D3D12 subresources with respect to texture barriers. Layouts apply only to texture resources.

Constants

D3D12DDI_BARRIER_LAYOUT_UNDEFINED

Provides support for subresource layout changes where the previous layout is irrelevant or undefined. Typically, this is used for full-subresource or full-resource Clear, Discard, and Copy commands.

A layout transition with both LayoutBefore and LayoutAfter set to D3D12_BARRIER_LAYOUT_UNDEFINED indicates a memory-access-only barrier. Many read/write operations support D3D12_BARRIER_LAYOUT_COMMON. In particular, Copy commands can write to textures using either the D3D12_BARRIER_LAYOUT_COMMON or D3D12_BARRIER_LAYOUT_COPY. A memory-access-only barrier can be used to flush copy writes to a texture without changing the texture layout.

D3D12DDI_BARRIER_LAYOUT_COMMON

This is the layout used by D3D12_RESOURCE_STATE_COMMON. Subresources with this layout are readable in any queue type without requiring a layout change. They are also writeable as a copy destination in any queue type.

Swap chain presentation requires that the back buffer is using D3D12_BARRIER_LAYOUT_COMMON.

D3D12DDI_BARRIER_LAYOUT_PRESENT

Alias for D3D12_BARRIER_LAYOUT_COMMON.

D3D12DDI_BARRIER_LAYOUT_GENERIC_READ

Provides support for any read-only access (for example: SHADER_RESOURCE, COPY_SOURCE). This value should only be used for textures that require multiple, concurrent read accesses since this might not be as optimal as a more specific read layout.

D3D12DDI_BARRIER_LAYOUT_RENDER_TARGET

Matches the layout used by D3D12_RESOURCE_STATE_RENDER_TARGET.

D3D12DDI_BARRIER_LAYOUT_UNORDERED_ACCESS

Matches the layout used by D3D12_RESOURCE_STATE_UNORDERED_ACCESS.

D3D12DDI_BARRIER_LAYOUT_DEPTH_STENCIL_WRITE

Matches the layout used by D3D12_RESOURCE_STATE_DEPTH_WRITE.

D3D12DDI_BARRIER_LAYOUT_DEPTH_STENCIL_READ

Matches the layout used by D3D12_RESOURCE_STATE_DEPTH_READ.

D3D12DDI_BARRIER_LAYOUT_SHADER_RESOURCE

Matches the layout used by D3D12_RESOURCE_STATE_PIXEL_SHADER_RESOURCE and D3D12_RESOURCE_STATE_NON_PIXEL_SHADER_RESOURCE.

D3D12DDI_BARRIER_LAYOUT_COPY_SOURCE

Matches the layout used by D3D12_RESOURCE_STATE_COPY_SOURCE.

D3D12DDI_BARRIER_LAYOUT_COPY_DEST

Matches the layout used by D3D12_RESOURCE_STATE_COPY_DEST.

D3D12DDI_BARRIER_LAYOUT_RESOLVE_SOURCE

Matches the layout used by D3D12DDI_RESOURCE_STATE_RESOLVE_SOURCE.

D3D12DDI_BARRIER_LAYOUT_RESOLVE_DEST

Matches the layout used by D3D12DDI_RESOURCE_STATE_RESOLVE_DEST.

D3D12DDI_BARRIER_LAYOUT_SHADING_RATE_SOURCE

Matches the layout used by D3D12DDI_RESOURCE_STATE_0062_SHADING_RATE_SOURCE.

D3D12DDI_BARRIER_LAYOUT_VIDEO_DECODE_READ

Matches the layout used by D3D12_RESOURCE_STATE_VIDEO_DECODE_READ.

D3D12DDI_BARRIER_LAYOUT_VIDEO_DECODE_WRITE

Matches the layout used by D3D12_RESOURCE_STATE_VIDEO_DECODE_WRITE.

D3D12DDI_BARRIER_LAYOUT_VIDEO_PROCESS_READ

Matches the layout used by D3D12_RESOURCE_STATE_VIDEO_PROCESS_READ.

D3D12DDI_BARRIER_LAYOUT_VIDEO_PROCESS_WRITE

Matches the layout used by D3D12_RESOURCE_STATE_VIDEO_PROCESS_WRITE.

D3D12DDI_BARRIER_LAYOUT_VIDEO_ENCODE_READ

Matches the layout used by D3D12_RESOURCE_STATE_VIDEO_ENCODE_READ.

D3D12DDI_BARRIER_LAYOUT_VIDEO_ENCODE_WRITE

Matches the layout used by D3D12_RESOURCE_STATE_VIDEO_ENCODE_WRITE.

D3D12DDI_BARRIER_LAYOUT_DIRECT_QUEUE_COMMON

Supports common (barrier free) usage on direct queues only. This value be more optimal than the more general D3D12DDI_BARRIER_LAYOUT_COMMON. Can only be used in barriers on direct queues.

Note that this cannot be used for Present. D3D12_BARRIER_LAYOUT_COMMON (also known as D3D12_BARRIER_LAYOUT_PRESENT) is still the required layout for Presentation.

D3D12DDI_BARRIER_LAYOUT_DIRECT_QUEUE_GENERIC_READ

Same as D3D12_BARRIER_LAYOUT_GENERIC_READ except with optimizations specific for direct queues. Can only be used in barriers on direct queues.

In addition, D3D12_BARRIER_LAYOUT_DIRECT_QUEUE_GENERIC_READ includes support for read-only depth, shading-rate source, and resolve source accesses on direct queues.

D3D12DDI_BARRIER_LAYOUT_DIRECT_QUEUE_UNORDERED_ACCESS

Same as D3D12_BARRIER_LAYOUT_UNORDERED_ACCESS except with optimizations specific for direct queues. Can only be used in barriers on direct queues.

D3D12DDI_BARRIER_LAYOUT_DIRECT_QUEUE_SHADER_RESOURCE

Same as D3D12_BARRIER_LAYOUT_SHADER_RESOURCE except with optimizations specific for direct queues. Can only be used in barriers on direct queues.

D3D12DDI_BARRIER_LAYOUT_DIRECT_QUEUE_COPY_SOURCE

Same as D3D12_BARRIER_LAYOUT_COPY_SOURCE except with optimizations specific for direct queues. Can only be used in barriers on direct queues.

D3D12DDI_BARRIER_LAYOUT_DIRECT_QUEUE_COPY_DEST

Same as D3D12_BARRIER_LAYOUT_COPY_DEST except with optimizations specific for direct queues. Can only be used in barriers on direct queues. Can prevent costly and unnecessary decompression on some layout transitions on resources with next access in a Direct queue.

D3D12DDI_BARRIER_LAYOUT_COMPUTE_QUEUE_COMMON

Supports common (barrier free) usage on compute queues only. May be more optimal than the more general D3D12_BARRIER_LAYOUT_COMMON. Can only be used in barriers on compute queues.

D3D12DDI_BARRIER_LAYOUT_COMPUTE_QUEUE_GENERIC_READ

Same as D3D12_BARRIER_LAYOUT_GENERIC_READ except with optimizations specific for compute queues. Can only be used in barriers on compute queues.

D3D12DDI_BARRIER_LAYOUT_COMPUTE_QUEUE_UNORDERED_ACCESS

Same as D3D12_BARRIER_LAYOUT_UNORDERED_ACCESS except with optimizations specific for compute queues. Can only be used in barriers on compute queues.

D3D12DDI_BARRIER_LAYOUT_COMPUTE_QUEUE_SHADER_RESOURCE

Same as D3D12_BARRIER_LAYOUT_SHADER_RESOURCE except with optimizations specific for compute queues. Can only be used in barriers on compute queues.

D3D12DDI_BARRIER_LAYOUT_COMPUTE_QUEUE_COPY_SOURCE

Same as D3D12_BARRIER_LAYOUT_COPY_SOURCE except with optimizations specific for compute queues. Can only be used in barriers on compute queues.

D3D12DDI_BARRIER_LAYOUT_COMPUTE_QUEUE_COPY_DEST

Same as D3D12_BARRIER_LAYOUT_COPY_DEST except with optimizations specific for compute queues. Can only be used in barriers on compute queues.

D3D12DDI_BARRIER_LAYOUT_VIDEO_QUEUE_COMMON

Supports common (barrier free) usage on video queues only. May be more optimal than the more general D3D12_BARRIER_LAYOUT_COMMON. Can only be used in barriers on video queues.

D3D12DDI_BARRIER_LAYOUT_LEGACY_DIRECT_QUEUE_GENERIC_READ_COMPUTE_QUEUE_ACCESSIBLE

Supports an internally-translated legacy resource state. No enhanced barrier APIs map to this value.

D3D12DDI_BARRIER_LAYOUT_LEGACY_COPY_SOURCE

Supports an internally-translated legacy resource state. No enhanced barrier APIs map to this value.

D3D12DDI_BARRIER_LAYOUT_LEGACY_COPY_DEST

Supports an internally-translated legacy resource state. No enhanced barrier APIs map to this value.

D3D12DDI_BARRIER_LAYOUT_LEGACY_SHADER_RESOURCE

Supports an internally-translated legacy resource state. No enhanced barrier APIs map to this value.

D3D12DDI_BARRIER_LAYOUT_LEGACY_PIXEL_SHADER_RESOURCE

Supports an internally-translated legacy resource state. No enhanced barrier APIs map to this value.

Remarks

Buffer resources have only a linear layout, regardless of access type.

Resource layouts must be compatible with the type of queue performing the layout transition.

See also

D3D12DDI_TEXTURE_BARRIER_0088

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