VK_EXT_depth_range_unrestricted(3)

# VK_EXT_depth_range_unrestricted(3) Manual Page

## Name

VK_EXT_depth_range_unrestricted - device extension

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## Registered Extension Number

14

## Revision

1

## Ratification Status

Not ratified

## Extension and Version Dependencies

None

## Contact

- Piers Daniell pdaniell-nv

## Other Extension Metadata

Last Modified Date

  2017-06-22

Contributors

  - Daniel Koch, NVIDIA

  - Jeff Bolz, NVIDIA

## Description

This extension removes the VkViewport `minDepth` and `maxDepth` restrictions that the values must be between `0.0` and `1.0`, inclusive. It also removes the same restriction on VkPipelineDepthStencilStateCreateInfo `minDepthBounds` and `maxDepthBounds`. Finally it removes the restriction on the `depth` value in VkClearDepthStencilValue.

## New Enum Constants

- `VK_EXT_DEPTH_RANGE_UNRESTRICTED_EXTENSION_NAME`

- `VK_EXT_DEPTH_RANGE_UNRESTRICTED_SPEC_VERSION`

## Issues

1) How do VkViewport `minDepth` and `maxDepth` values outside of the `0.0` to `1.0` range interact with Primitive Clipping?

RESOLVED: The behavior described in Primitive Clipping still applies. If depth clamping is disabled the depth values are still clipped to 0 ≤ zc ≤ wc before the viewport transform. If depth clamping is enabled the above equation is ignored and the depth values are instead clamped to the VkViewport `minDepth` and `maxDepth` values, which in the case of this extension can be outside of the `0.0` to `1.0` range.

2) What happens if a resulting depth fragment is outside of the `0.0` to `1.0` range and the depth buffer is fixed-point rather than floating-point?

RESOLVED: This situation can also arise without this extension (when fragment shaders replace depth values, for example), and this extension does not change the behaviour, which is defined in the Depth Test section of the Fragment Operations chapter.

## Version History

- Revision 1, 2017-06-22 (Piers Daniell)

  - Internal revisions

## 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 2014-2024 The Khronos Group Inc.

SPDX-License-Identifier: CC-BY-4.0