HelperInvocation(3)

Name

HelperInvocation - Indication of whether a fragment shader is a helper invocation

Description

HelperInvocation

Decorating a variable with the HelperInvocation built-in decoration will make that variable contain whether the current invocation is a helper invocation. This variable is non-zero if the current fragment being shaded is a helper invocation and zero otherwise. A helper invocation is an invocation of the shader that is produced to satisfy internal requirements such as the generation of derivatives.

It is very likely that a helper invocation will have a value of SampleMask fragment shader input value that is zero.
Valid Usage

  • VUID-HelperInvocation-HelperInvocation-04239
    The HelperInvocation decoration must be used only within the Fragment Execution Model

  • VUID-HelperInvocation-HelperInvocation-04240
    The variable decorated with HelperInvocation must be declared using the Input Storage Class

  • VUID-HelperInvocation-HelperInvocation-04241
    The variable decorated with HelperInvocation must be declared as a boolean value

See Also

No cross-references are available

Document Notes

For more information, see the Vulkan Specification (NOTE: cannot determine Specification page containing this refpage).

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