EXTQueueFamilyForeign (LWJGL 3.2.3 SNAPSHOT)

java.lang.Object
- org.lwjgl.vulkan.EXTQueueFamilyForeign

```
public final class EXTQueueFamilyForeign
extends java.lang.Object
```
This extension defines a special queue family, QUEUE_FAMILY_FOREIGN_EXT, which can be used to transfer ownership of resources backed by external memory to foreign, external queues. This is similar to QUEUE_FAMILY_EXTERNAL_KHR, defined in VK_KHR_external_memory. The key differences between the two are:
- The queues represented by QUEUE_FAMILY_EXTERNAL_KHR must share the same physical device and the same driver version as the current VkInstance. QUEUE_FAMILY_FOREIGN_EXT has no such restrictions. It can represent devices and drivers from other vendors, and can even represent non-Vulkan-capable devices.
- All resources backed by external memory support QUEUE_FAMILY_EXTERNAL_KHR. Support for QUEUE_FAMILY_FOREIGN_EXT is more restrictive.
- Applications should expect transitions to/from QUEUE_FAMILY_FOREIGN_EXT to be more expensive than transitions to/from QUEUE_FAMILY_EXTERNAL_KHR.
Name String

VK_EXT_queue_family_foreign

Extension Type

Device extension

Registered Extension Number

127

Revision

1

Extension and Version Dependencies
- Requires Vulkan 1.0
- Requires VK_KHR_external_memory
Contact
- Chad Versace chadversary
Last Modified Date

2017-11-01

IP Status

No known IP claims.

Contributors
- Chad Versace, Google
- James Jones, NVIDIA
- Jason Ekstrand, Intel
- Jesse Hall, Google
- Daniel Rakos, AMD
- Ray Smith, ARM

Field Summary

Fields
Modifier and Type	Field	Description
`static java.lang.String`	`VK_EXT_QUEUE_FAMILY_FOREIGN_EXTENSION_NAME`	The extension name.
`static int`	`VK_EXT_QUEUE_FAMILY_FOREIGN_SPEC_VERSION`	The extension specification version.
`static int`	`VK_QUEUE_FAMILY_FOREIGN_EXT`	VK_QUEUE_FAMILY_FOREIGN_EXT

Method Summary
- Methods inherited from class java.lang.Object
  equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - VK_EXT_QUEUE_FAMILY_FOREIGN_SPEC_VERSION
```
public static final int VK_EXT_QUEUE_FAMILY_FOREIGN_SPEC_VERSION
```
    The extension specification version.
    
    See Also:
    
    Constant Field Values
  - VK_EXT_QUEUE_FAMILY_FOREIGN_EXTENSION_NAME
```
public static final java.lang.String VK_EXT_QUEUE_FAMILY_FOREIGN_EXTENSION_NAME
```
    The extension name.
    
    See Also:
    
    Constant Field Values
  - VK_QUEUE_FAMILY_FOREIGN_EXT
```
public static final int VK_QUEUE_FAMILY_FOREIGN_EXT
```
    VK_QUEUE_FAMILY_FOREIGN_EXT
    
    See Also:
    
    Constant Field Values