Description

FragDepth

To have a shader supply a fragment-depth value, the shader must declare the DepthReplacing execution mode. Such a shader’s fragment-depth value will come from the variable decorated with the FragDepth built-in decoration.

This value will be used for any subsequent depth testing performed by the implementation or writes to the depth attachment. See fragment shader depth replacement for details.

Valid Usage

  • VUID-FragDepth-FragDepth-04213
    The FragDepth decoration must be used only within the Fragment Execution Model

  • VUID-FragDepth-FragDepth-04214
    The variable decorated with FragDepth must be declared using the Output Storage Class

  • VUID-FragDepth-FragDepth-04215
    The variable decorated with FragDepth must be declared as a scalar 32-bit floating-point value

  • VUID-FragDepth-FragDepth-04216
    If the shader dynamically writes to the variable decorated with FragDepth, the DepthReplacing Execution Mode must be declared

See Also

No cross-references are available

Document Notes

For more information, see the Vulkan Specification

This page is extracted from the Vulkan Specification. Fixes and changes should be made to the Specification, not directly.

Copyright

Copyright 2014-2023 The Khronos Group Inc.

SPDX-License-Identifier: CC-BY-4.0