C Specification
If the pNext
list of VkImageCreateInfo includes a
VkImageCompressionControlEXT
structure, then that structure describes
compression controls for this image.
The VkImageCompressionControlEXT
structure is defined as:
// Provided by VK_EXT_image_compression_control
typedef struct VkImageCompressionControlEXT {
VkStructureType sType;
const void* pNext;
VkImageCompressionFlagsEXT flags;
uint32_t compressionControlPlaneCount;
VkImageCompressionFixedRateFlagsEXT* pFixedRateFlags;
} VkImageCompressionControlEXT;
Members
-
sType
is a VkStructureType value identifying this structure. -
pNext
isNULL
or a pointer to a structure extending this structure. -
flags
is a bitmask of VkImageCompressionFlagBitsEXT describing compression controls for the image. -
compressionControlPlaneCount
is the number of entries in thepFixedRateFlags
array. -
pFixedRateFlags
isNULL
or a pointer to an array of VkImageCompressionFixedRateFlagsEXT bitfields describing allowed fixed-rate compression rates of each image plane. It is ignored ifflags
does not includeVK_IMAGE_COMPRESSION_FIXED_RATE_EXPLICIT_EXT
.
Description
If enabled, fixed-rate compression is done in an implementation-defined manner and may be applied at block granularity. In that case, a write to an individual texel may modify the value of other texels in the same block.
Note
|
Some combinations of compression properties may not be supported. For example, some implementations may not support different fixed-rate compression rates per plane of a multi-planar format and will not be able to enable fixed-rate compression for any plane if the requested rates differ. |
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.