This extension allows an application to specify areas of the render target where the fragment shader may be invoked fewer times. These fragments are broadcasted out to multiple pixels to cover the render target.

The primary use of this extension is to reduce workloads in areas where lower quality may not be perceived such as the distorted edges of a lens or the periphery of a user’s gaze.

VK_EXT_fragment_density_map

Name String

VK_EXT_fragment_density_map

Extension Type

Device extension

Registered Extension Number

219

Revision

2

Extension and Version Dependencies

VK_KHR_get_physical_device_properties2

Contact

• Matthew Netsch mnetsch

Other Extension Metadata

Last Modified Date

2021-09-30

Interactions and External Dependencies

• This extension requires SPV_EXT_fragment_invocation_density
• This extension provides API support for GL_EXT_fragment_invocation_density

Contributors

• Matthew Netsch, Qualcomm Technologies, Inc.
• Robert VanReenen, Qualcomm Technologies, Inc.
• Jonathan Wicks, Qualcomm Technologies, Inc.
• Tate Hornbeck, Qualcomm Technologies, Inc.
• Sam Holmes, Qualcomm Technologies, Inc.
• Jeff Leger, Qualcomm Technologies, Inc.
• Jan-Harald Fredriksen, ARM
• Jeff Bolz, NVIDIA
• Pat Brown, NVIDIA
• Daniel Rakos, AMD
• Piers Daniell, NVIDIA