VK_KHR_8bit_storage

Other Extension Metadata

Last Modified Date

2018-02-05

Interactions and External Dependencies

• This extension provides API support for GL_EXT_shader_16bit_storage

IP Status

No known IP claims.

Contributors

• Alexander Galazin, Arm

Description

The VK_KHR_8bit_storage extension allows use of 8-bit types in uniform and storage buffers, and push constant blocks. This extension introduces several new optional features which map to SPIR-V capabilities and allow access to 8-bit data in Block-decorated objects in the Uniform and the StorageBuffer storage classes, and objects in the PushConstant storage class.

The StorageBuffer8BitAccess capability must be supported by all implementations of this extension. The other capabilities are optional.

Promotion to Vulkan 1.2

Vulkan APIs in this extension are included in core Vulkan 1.2, with the KHR suffix omitted. However, if Vulkan 1.2 is supported and this extension is not, the StorageBuffer8BitAccess capability is optional. External interactions defined by this extension, such as SPIR-V token names, retain their original names. The original Vulkan API names are still available as aliases of the core functionality.

Promotion to Vulkan 1.4

If Vulkan 1.4 is supported, support for the storageBuffer8BitAccess capability is required.

New Structures

• Extending VkPhysicalDeviceFeatures2, VkDeviceCreateInfo:
  • VkPhysicalDevice8BitStorageFeaturesKHR

New Enum Constants

• VK_KHR_8BIT_STORAGE_EXTENSION_NAME
• VK_KHR_8BIT_STORAGE_SPEC_VERSION
• Extending VkStructureType:
  • VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_8BIT_STORAGE_FEATURES_KHR

New SPIR-V Capabilities

• StorageBuffer8BitAccess
• UniformAndStorageBuffer8BitAccess
• StoragePushConstant8

Version History

• Revision 1, 2018-02-05 (Alexander Galazin)
  • Initial draft