SPIR-V Extension SPV_EXT_shader_stencil_export

SPV_EXT_shader_stencil_export

To report problems with this extension, please open a new issue at:

https://github.com/KhronosGroup/SPIRV-Registry

Copyright (c) 2017 The Khronos Group Inc. Copyright terms at http://www.khronos.org/registry/speccopyright.html

Released.

Modified Date: 08/10/2017

Revision: 3

This extension is written against Revision 1 of the version 1.10 of the SPIR-V Specification.

The extension is written against Revision 1 of the OpenGL extension ARB_shader_stencil_export.

This extension is written to provide the functionality of the ARB_shader_stencil_export, OpenGL Shading Language Specification extension, for SPIR-V.

This extension adds a new capability, as well as a new built-in. Both, when combined, let the application output a specific reference stencil value from within a fragment shader.

To enable SPV_EXT_shader_stencil_export extension in SPIR-V, use

This extension introduces a new execution mode:

This extension adds the following builtins:

FragStencilRefEXT must only decorate output variable whose type is an arbitrary-sized integer type scalar.

Modify Section 3.21, the BuiltIn list.

(Add to the list of builtins with a CapabilityStencilExportEXT capability)

The FragStencilRefEXT builtin can be used to output reference stencil value.

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