Package org.lwjgl.vulkan

Class EXTShaderDemoteToHelperInvocation

java.lang.Object

org.lwjgl.vulkan.EXTShaderDemoteToHelperInvocation

public final class EXTShaderDemoteToHelperInvocation
extends java.lang.Object

This extension adds Vulkan support for the SPV_EXT_demote_to_helper_invocation SPIR-V extension. That SPIR-V extension provides a new instruction OpDemoteToHelperInvocationEXT allowing shaders to “demote” a fragment shader invocation to behave like a helper invocation for its duration. The demoted invocation will have no further side effects and will not output to the framebuffer, but remains active and can participate in computing derivatives and in group operations. This is a better match for the “discard” instruction in HLSL.

Promotion to Vulkan 1.3

Functionality in this extension is included in core Vulkan 1.3, with the EXT suffix omitted. The original type, enum and command names are still available as aliases of the core functionality.

VK_EXT_shader_demote_to_helper_invocation

Name String

VK_EXT_shader_demote_to_helper_invocation

Extension Type

Device extension

Registered Extension Number

277

Revision

1

Extension and Version Dependencies

• Requires Vulkan 1.0
• Requires VK_KHR_get_physical_device_properties2

Deprecation state

• Promoted to Vulkan 1.3

Contact

• Jeff Bolz jeffbolznv

Other Extension Metadata

Last Modified Date

2019-06-01

Interactions and External Dependencies

• Promoted to Vulkan 1.3 Core

IP Status

No known IP claims.

Interactions and External Dependencies

• This extension requires SPV_EXT_demote_to_helper_invocation
• This extension provides API support for GL_EXT_demote_to_helper_invocation

Contributors

• Jeff Bolz, NVIDIA

Field Summary

Fields

Modifier and Type	Field	Description
static java.lang.String	VK_EXT_SHADER_DEMOTE_TO_HELPER_INVOCATION_EXTENSION_NAME	The extension name.
static int	VK_EXT_SHADER_DEMOTE_TO_HELPER_INVOCATION_SPEC_VERSION	The extension specification version.
static int	VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_SHADER_DEMOTE_TO_HELPER_INVOCATION_FEATURES_EXT	Extends VkStructureType.

Method Summary

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

VK_EXT_SHADER_DEMOTE_TO_HELPER_INVOCATION_SPEC_VERSION

public static final int VK_EXT_SHADER_DEMOTE_TO_HELPER_INVOCATION_SPEC_VERSION

The extension specification version.

See Also:

Constant Field Values

VK_EXT_SHADER_DEMOTE_TO_HELPER_INVOCATION_EXTENSION_NAME

public static final java.lang.String VK_EXT_SHADER_DEMOTE_TO_HELPER_INVOCATION_EXTENSION_NAME

The extension name.

See Also:

Constant Field Values

VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_SHADER_DEMOTE_TO_HELPER_INVOCATION_FEATURES_EXT

public static final int VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_SHADER_DEMOTE_TO_HELPER_INVOCATION_FEATURES_EXT

Extends VkStructureType.

See Also:

Constant Field Values