C Specification
The VkImageMemoryBarrier structure is defined as:
// Provided by VK_VERSION_1_0
typedef struct VkImageMemoryBarrier {
VkStructureType sType;
const void* pNext;
VkAccessFlags srcAccessMask;
VkAccessFlags dstAccessMask;
VkImageLayout oldLayout;
VkImageLayout newLayout;
uint32_t srcQueueFamilyIndex;
uint32_t dstQueueFamilyIndex;
VkImage image;
VkImageSubresourceRange subresourceRange;
} VkImageMemoryBarrier;Members
-
sTypeis the type of this structure. -
pNextisNULLor a pointer to a structure extending this structure. -
srcAccessMaskis a bitmask of VkAccessFlagBits specifying a source access mask. -
dstAccessMaskis a bitmask of VkAccessFlagBits specifying a destination access mask. -
oldLayoutis the old layout in an image layout transition. -
newLayoutis the new layout in an image layout transition. -
srcQueueFamilyIndexis the source queue family for a queue family ownership transfer. -
dstQueueFamilyIndexis the destination queue family for a queue family ownership transfer. -
imageis a handle to the image affected by this barrier. -
subresourceRangedescribes the image subresource range withinimagethat is affected by this barrier.
Description
The first access scope is
limited to access to memory through the specified image subresource range,
via access types in the source access mask
specified by srcAccessMask.
If srcAccessMask includes VK_ACCESS_HOST_WRITE_BIT, memory
writes performed by that access type are also made visible, as that access
type is not performed through a resource.
The second access scope is
limited to access to memory through the specified image subresource range,
via access types in the destination access
mask specified by dstAccessMask.
If dstAccessMask includes VK_ACCESS_HOST_WRITE_BIT or
VK_ACCESS_HOST_READ_BIT, available memory writes are also made visible
to accesses of those types, as those access types are not performed through
a resource.
If srcQueueFamilyIndex is not equal to dstQueueFamilyIndex, and
srcQueueFamilyIndex is equal to the current queue family, then the
memory barrier defines a queue
family release operation for the specified image subresource range, and
the second access scope includes no access, as if dstAccessMask was
0.
If dstQueueFamilyIndex is not equal to srcQueueFamilyIndex, and
dstQueueFamilyIndex is equal to the current queue family, then the
memory barrier defines a queue
family acquire operation for the specified image subresource range, and
the first access scope includes no access, as if srcAccessMask was
0.
If the synchronization2 feature is not
enabled or oldLayout is not equal to newLayout,
oldLayout and newLayout define an
image layout transition for
the specified image subresource range.
|
Note
If the |
If image has a multi-planar format and the image is disjoint, then
including VK_IMAGE_ASPECT_COLOR_BIT in the aspectMask member of
subresourceRange is equivalent to including
VK_IMAGE_ASPECT_PLANE_0_BIT, VK_IMAGE_ASPECT_PLANE_1_BIT, and
(for three-plane formats only) VK_IMAGE_ASPECT_PLANE_2_BIT.
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.