Package org.lwjgl.vulkan

Class KHRShaderDrawParameters

java.lang.Object

org.lwjgl.vulkan.KHRShaderDrawParameters

public final class KHRShaderDrawParameters
extends Object

This extension adds support for the following SPIR-V extension in Vulkan:

• SPV_KHR_shader_draw_parameters

The extension provides access to three additional built-in shader variables in Vulkan:

• BaseInstance, containing the firstInstance parameter passed to drawing commands,
• BaseVertex, containing the firstVertex or vertexOffset parameter passed to drawing commands, and
• DrawIndex, containing the index of the draw call currently being processed from an indirect drawing call.

When using GLSL source-based shader languages, the following variables from GL_ARB_shader_draw_parameters can map to these SPIR-V built-in decorations:

• in int gl_BaseInstanceARB; → BaseInstance,
• in int gl_BaseVertexARB; → BaseVertex, and
• in int gl_DrawIDARB; → DrawIndex.

Promotion to Vulkan 1.1

All functionality in this extension is included in core Vulkan 1.1. However, the shaderDrawParameters feature bit was added to distinguish whether it is actually available or not.

Name String

VK_KHR_shader_draw_parameters

Extension Type

Device extension

Registered Extension Number

64

Revision

1

SPIR-V Dependencies

• SPV_KHR_shader_draw_parameters

Deprecation State

• Promoted to Vulkan 1.1

Contact

• Daniel Koch dgkoch

Other Extension Metadata

Last Modified Date

2017-09-05

IP Status

No known IP claims.

Interactions and External Dependencies

• This extension provides API support for GL_ARB_shader_draw_parameters

Contributors

• Daniel Koch, NVIDIA Corporation
• Jeff Bolz, NVIDIA
• Daniel Rakos, AMD
• Jan-Harald Fredriksen, ARM
• John Kessenich, Google
• Stuart Smith, IMG

Field Summary

Fields

Modifier and Type	Field	Description
static final String	VK_KHR_SHADER_DRAW_PARAMETERS_EXTENSION_NAME	The extension name.
static final int	VK_KHR_SHADER_DRAW_PARAMETERS_SPEC_VERSION	The extension specification version.

Method Summary

Methods inherited from class java.lang.Object

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

Field Details

VK_KHR_SHADER_DRAW_PARAMETERS_SPEC_VERSION

public static final int VK_KHR_SHADER_DRAW_PARAMETERS_SPEC_VERSION

The extension specification version.

See Also:

• Constant Field Values

VK_KHR_SHADER_DRAW_PARAMETERS_EXTENSION_NAME

public static final String VK_KHR_SHADER_DRAW_PARAMETERS_EXTENSION_NAME

The extension name.

See Also:

• Constant Field Values