C Specification
To query the compression properties of an image, add a
VkImageCompressionPropertiesEXT structure to the pNext chain of
the VkSubresourceLayout2 structure in a call to
vkGetImageSubresourceLayout2.
To determine the compression rates that are supported for a given image
format, add a VkImageCompressionPropertiesEXT structure to the
pNext chain of the VkImageFormatProperties2 structure in a call
to vkGetPhysicalDeviceImageFormatProperties2.
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Note
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Since fixed-rate compression is disabled by default, the
VkImageCompressionPropertiesEXT structure passed to
vkGetPhysicalDeviceImageFormatProperties2 will not indicate any
fixed-rate compression support unless a VkImageCompressionControlEXT
structure is also included in the |
The VkImageCompressionPropertiesEXT structure is defined as:
// Provided by VK_EXT_image_compression_control
typedef struct VkImageCompressionPropertiesEXT {
VkStructureType sType;
void* pNext;
VkImageCompressionFlagsEXT imageCompressionFlags;
VkImageCompressionFixedRateFlagsEXT imageCompressionFixedRateFlags;
} VkImageCompressionPropertiesEXT;Members
-
sTypeis a VkStructureType value identifying this structure. -
pNextisNULLor a pointer to a structure extending this structure. -
imageCompressionFlagsreturns a value describing the compression controls that apply to the image. The value will be either VK_IMAGE_COMPRESSION_DEFAULT_EXT to indicate no fixed-rate compression, VK_IMAGE_COMPRESSION_FIXED_RATE_EXPLICIT_EXT to indicate fixed-rate compression, or VK_IMAGE_COMPRESSION_DISABLED_EXT to indicate no compression. -
imageCompressionFixedRateFlagsreturns a VkImageCompressionFixedRateFlagsEXT value describing the compression rates that apply to the specified aspect of the image.
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.