C Specification
Bits which may be set in
VkExternalMemoryProperties::externalMemoryFeatures
, specifying
features of an external memory handle type, are:
// Provided by VK_VERSION_1_1
typedef enum VkExternalMemoryFeatureFlagBits {
VK_EXTERNAL_MEMORY_FEATURE_DEDICATED_ONLY_BIT = 0x00000001,
VK_EXTERNAL_MEMORY_FEATURE_EXPORTABLE_BIT = 0x00000002,
VK_EXTERNAL_MEMORY_FEATURE_IMPORTABLE_BIT = 0x00000004,
// Provided by VK_KHR_external_memory_capabilities
VK_EXTERNAL_MEMORY_FEATURE_DEDICATED_ONLY_BIT_KHR = VK_EXTERNAL_MEMORY_FEATURE_DEDICATED_ONLY_BIT,
// Provided by VK_KHR_external_memory_capabilities
VK_EXTERNAL_MEMORY_FEATURE_EXPORTABLE_BIT_KHR = VK_EXTERNAL_MEMORY_FEATURE_EXPORTABLE_BIT,
// Provided by VK_KHR_external_memory_capabilities
VK_EXTERNAL_MEMORY_FEATURE_IMPORTABLE_BIT_KHR = VK_EXTERNAL_MEMORY_FEATURE_IMPORTABLE_BIT,
} VkExternalMemoryFeatureFlagBits;
or the equivalent
// Provided by VK_KHR_external_memory_capabilities
typedef VkExternalMemoryFeatureFlagBits VkExternalMemoryFeatureFlagBitsKHR;
Description
-
VK_EXTERNAL_MEMORY_FEATURE_DEDICATED_ONLY_BIT
specifies that images or buffers created with the specified parameters and handle type must use the mechanisms defined by VkMemoryDedicatedRequirements and VkMemoryDedicatedAllocateInfo to create (or import) a dedicated allocation for the image or buffer. -
VK_EXTERNAL_MEMORY_FEATURE_EXPORTABLE_BIT
specifies that handles of this type can be exported from Vulkan memory objects. -
VK_EXTERNAL_MEMORY_FEATURE_IMPORTABLE_BIT
specifies that handles of this type can be imported as Vulkan memory objects.
Because their semantics in external APIs roughly align with that of an image
or buffer with a dedicated allocation in Vulkan, implementations are
required to report VK_EXTERNAL_MEMORY_FEATURE_DEDICATED_ONLY_BIT
for
the following external handle types:
-
VK_EXTERNAL_MEMORY_HANDLE_TYPE_D3D11_TEXTURE_BIT
-
VK_EXTERNAL_MEMORY_HANDLE_TYPE_D3D11_TEXTURE_KMT_BIT
-
VK_EXTERNAL_MEMORY_HANDLE_TYPE_D3D12_RESOURCE_BIT
-
VK_EXTERNAL_MEMORY_HANDLE_TYPE_ANDROID_HARDWARE_BUFFER_BIT_ANDROID
for images only -
VK_EXTERNAL_MEMORY_HANDLE_TYPE_SCREEN_BUFFER_BIT_QNX
for images only
Implementations must not report
VK_EXTERNAL_MEMORY_FEATURE_DEDICATED_ONLY_BIT
for buffers with
external handle type
VK_EXTERNAL_MEMORY_HANDLE_TYPE_ANDROID_HARDWARE_BUFFER_BIT_ANDROID
.
Implementations must not report
VK_EXTERNAL_MEMORY_FEATURE_DEDICATED_ONLY_BIT
for buffers with
external handle type
VK_EXTERNAL_MEMORY_HANDLE_TYPE_SCREEN_BUFFER_BIT_QNX
.
Implementations must not report
VK_EXTERNAL_MEMORY_FEATURE_DEDICATED_ONLY_BIT
for images or buffers
with external handle type
VK_EXTERNAL_MEMORY_HANDLE_TYPE_HOST_ALLOCATION_BIT_EXT
, or
VK_EXTERNAL_MEMORY_HANDLE_TYPE_HOST_MAPPED_FOREIGN_MEMORY_BIT_EXT
.
Document Notes
For more information, see the Vulkan Specification
This page is extracted from the Vulkan Specification. Fixes and changes should be made to the Specification, not directly.