# VK_AMDX_dense_geometry_format(3) Manual Page

## Name

VK_AMDX_dense_geometry_format - device extension

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## Registered Extension Number

479

## Revision

1

## Ratification Status

Not ratified

## Extension and Version Dependencies

VK_KHR_acceleration_structure
and
VK_KHR_maintenance5
or
Vulkan Version 1.4

- This is a provisional extension and must be used with caution. See the description of provisional header files for enablement and stability details.

## Contact

- Stu Smith [GitHub]stu-s

## Extension Proposal

VK_AMDX_dense_geometry_format

## Other Extension Metadata

Last Modified Date

  2025-07-10

IP Status

  No known IP claims.

Contributors

  - Stu Smith, AMD

  - Josh Barczak, AMD

  - Carsten Benthin, AMD

  - David McAllister, AMD

## Description

This extension adds the ability to build ray tracing acceleration structures from pre-compressed `Dense Geometry Format` geometry data.

## New Structures

- Extending VkAccelerationStructureGeometryKHR:

  - VkAccelerationStructureDenseGeometryFormatTrianglesDataAMDX

- Extending VkPhysicalDeviceFeatures2, VkDeviceCreateInfo:

  - VkPhysicalDeviceDenseGeometryFormatFeaturesAMDX

## New Enums

- VkCompressedTriangleFormatAMDX

## New Enum Constants

- `VK_AMDX_DENSE_GEOMETRY_FORMAT_EXTENSION_NAME`

- `VK_AMDX_DENSE_GEOMETRY_FORMAT_SPEC_VERSION`

- `VK_COMPRESSED_TRIANGLE_FORMAT_DGF1_BYTE_ALIGNMENT_AMDX`

- `VK_COMPRESSED_TRIANGLE_FORMAT_DGF1_BYTE_STRIDE_AMDX`

- Extending VkBufferUsageFlagBits2:

  - `VK_BUFFER_USAGE_2_COMPRESSED_DATA_DGF1_BIT_AMDX`

- Extending VkGeometryTypeKHR:

  - `VK_GEOMETRY_TYPE_DENSE_GEOMETRY_FORMAT_TRIANGLES_AMDX`

- Extending VkStructureType:

  - `VK_STRUCTURE_TYPE_ACCELERATION_STRUCTURE_DENSE_GEOMETRY_FORMAT_TRIANGLES_DATA_AMDX`

  - `VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_DENSE_GEOMETRY_FORMAT_FEATURES_AMDX`

## Issues

None.

## Examples

None.

## Version History

- Revision 1, 2025-07-10 (Stu Smith)

  - Initial revision.

## See Also

No cross-references are available

## Document Notes

For more information, see the Vulkan Specification.

This page is a generated document. Fixes and changes should be made to the generator scripts, not directly.

## Copyright

Copyright 2014-2025 The Khronos Group Inc.

SPDX-License-Identifier: CC-BY-4.0