VK_QNX_external_memory_screen_buffer

Other Extension Metadata

Last Modified Date

2023-05-17

IP Status

No known IP claims.

Contributors

• Mike Gorchak, QNX / Blackberry Limited
• Aaron Ruby, QNX / Blackberry Limited

Description

This extension enables an application to import QNX Screen _screen_buffer objects created outside of the Vulkan device into Vulkan memory objects, where they can be bound to images and buffers.

Some _screen_buffer images have implementation-defined external formats that may not correspond to Vulkan formats. Sampler Y′C_BC_R conversion can be used to sample from these images and convert them to a known color space.

_screen_buffer is strongly typed, so naming the handle type is redundant. The internal layout and therefore size of a _screen_buffer image may depend on native usage flags that do not have corresponding Vulkan counterparts.

New Commands

• vkGetScreenBufferPropertiesQNX

New Structures

• VkScreenBufferPropertiesQNX
• Extending VkImageCreateInfo, VkSamplerYcbcrConversionCreateInfo:
  • VkExternalFormatQNX
• Extending VkMemoryAllocateInfo:
  • VkImportScreenBufferInfoQNX
• Extending VkPhysicalDeviceFeatures2, VkDeviceCreateInfo:
  • VkPhysicalDeviceExternalMemoryScreenBufferFeaturesQNX
• Extending VkScreenBufferPropertiesQNX:
  • VkScreenBufferFormatPropertiesQNX

New Enum Constants

• VK_QNX_EXTERNAL_MEMORY_SCREEN_BUFFER_EXTENSION_NAME
• VK_QNX_EXTERNAL_MEMORY_SCREEN_BUFFER_SPEC_VERSION
• Extending VkExternalMemoryHandleTypeFlagBits:
  • VK_EXTERNAL_MEMORY_HANDLE_TYPE_SCREEN_BUFFER_BIT_QNX
• Extending VkStructureType:
  • VK_STRUCTURE_TYPE_EXTERNAL_FORMAT_QNX
  • VK_STRUCTURE_TYPE_IMPORT_SCREEN_BUFFER_INFO_QNX
  • VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_EXTERNAL_MEMORY_SCREEN_BUFFER_FEATURES_QNX
  • VK_STRUCTURE_TYPE_SCREEN_BUFFER_FORMAT_PROPERTIES_QNX
  • VK_STRUCTURE_TYPE_SCREEN_BUFFER_PROPERTIES_QNX

Issues

Version History

• Revision 1, 2023-05-17 (Mike Gorchak)
  • Initial version