2126 lines
102 KiB
Plaintext
2126 lines
102 KiB
Plaintext
// Copyright (c) 2015-2019 Khronos Group. This work is licensed under a
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// Creative Commons Attribution 4.0 International License; see
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// http://creativecommons.org/licenses/by/4.0/
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[[features]]
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= Features
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_Features_ describe functionality which is not supported on all
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implementations.
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Features are properties of the physical device.
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Features are optional:, and must: be explicitly enabled before use.
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Support for features is reported and enabled on a per-feature basis.
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[NOTE]
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.Note
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====
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Features are reported via the basic slink:VkPhysicalDeviceFeatures
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structure, as well as the extensible structure
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sname:VkPhysicalDeviceFeatures2, which was added in the
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`<<VK_KHR_get_physical_device_properties2>>` extension and included in
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Vulkan 1.1.
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When new features are added in future Vulkan versions or extensions, each
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extension should: introduce one new feature structure, if needed.
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This structure can: be added to the pname:pNext chain of the
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sname:VkPhysicalDeviceFeatures2 structure.
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====
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[open,refpage='vkGetPhysicalDeviceFeatures',desc='Reports capabilities of a physical device',type='protos']
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--
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To query supported features, call:
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include::../api/protos/vkGetPhysicalDeviceFeatures.txt[]
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* pname:physicalDevice is the physical device from which to query the
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supported features.
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* pname:pFeatures is a pointer to a slink:VkPhysicalDeviceFeatures
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structure in which the physical device features are returned.
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For each feature, a value of ename:VK_TRUE specifies that the feature is
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supported on this physical device, and ename:VK_FALSE specifies that the
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feature is not supported.
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include::../validity/protos/vkGetPhysicalDeviceFeatures.txt[]
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--
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Fine-grained features used by a logical device must: be enabled at
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sname:VkDevice creation time.
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If a feature is enabled that the physical device does not support,
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sname:VkDevice creation will fail and return
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ename:VK_ERROR_FEATURE_NOT_PRESENT.
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The fine-grained features are enabled by passing a pointer to the
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sname:VkPhysicalDeviceFeatures structure via the pname:pEnabledFeatures
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member of the sname:VkDeviceCreateInfo structure that is passed into the
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fname:vkCreateDevice call.
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If a member of pname:pEnabledFeatures is set to ename:VK_TRUE or
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ename:VK_FALSE, then the device will be created with the indicated feature
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enabled or disabled, respectively.
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ifdef::VK_VERSION_1_1,VK_KHR_get_physical_device_properties2[]
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Features can: also be enabled by using the slink:VkPhysicalDeviceFeatures2
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structure.
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endif::VK_VERSION_1_1,VK_KHR_get_physical_device_properties2[]
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If an application wishes to enable all features supported by a device, it
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can: simply pass in the sname:VkPhysicalDeviceFeatures structure that was
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previously returned by fname:vkGetPhysicalDeviceFeatures.
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To disable an individual feature, the application can: set the desired
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member to ename:VK_FALSE in the same structure.
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Setting pname:pEnabledFeatures to `NULL`
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ifdef::VK_VERSION_1_1,VK_KHR_get_physical_device_properties2[]
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and not including a slink:VkPhysicalDeviceFeatures2 in the pname:pNext
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member of slink:VkDeviceCreateInfo
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endif::VK_VERSION_1_1,VK_KHR_get_physical_device_properties2[]
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is equivalent to setting all members of the structure to ename:VK_FALSE.
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[NOTE]
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.Note
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====
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Some features, such as pname:robustBufferAccess, may: incur a run-time
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performance cost.
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Application writers should: carefully consider the implications of enabling
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all supported features.
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====
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ifdef::VK_VERSION_1_1,VK_KHR_get_physical_device_properties2[]
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[open,refpage='vkGetPhysicalDeviceFeatures2',desc='Reports capabilities of a physical device',type='protos']
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--
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To query supported features defined by the core or extensions, call:
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ifdef::VK_VERSION_1_1[]
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include::../api/protos/vkGetPhysicalDeviceFeatures2.txt[]
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endif::VK_VERSION_1_1[]
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ifdef::VK_VERSION_1_1+VK_KHR_get_physical_device_properties2[or the equivalent command]
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ifdef::VK_KHR_get_physical_device_properties2[]
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include::../api/protos/vkGetPhysicalDeviceFeatures2KHR.txt[]
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endif::VK_KHR_get_physical_device_properties2[]
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* pname:physicalDevice is the physical device from which to query the
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supported features.
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* pname:pFeatures is a pointer to a slink:VkPhysicalDeviceFeatures2
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structure in which the physical device features are returned.
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Each structure in pname:pFeatures and its pname:pNext chain contain members
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corresponding to fine-grained features.
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fname:vkGetPhysicalDeviceFeatures2 writes each member to a boolean value
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indicating whether that feature is supported.
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include::../validity/protos/vkGetPhysicalDeviceFeatures2.txt[]
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--
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[open,refpage='VkPhysicalDeviceFeatures2',desc='Structure describing the fine-grained features that can be supported by an implementation',type='structs']
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--
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The sname:VkPhysicalDeviceFeatures2 structure is defined as:
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include::../api/structs/VkPhysicalDeviceFeatures2.txt[]
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ifdef::VK_KHR_get_physical_device_properties2[]
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or the equivalent
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include::../api/structs/VkPhysicalDeviceFeatures2KHR.txt[]
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endif::VK_KHR_get_physical_device_properties2[]
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The sname:VkPhysicalDeviceFeatures2 structure is defined as:
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* pname:sType is the type of this structure.
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* pname:pNext is `NULL` or a pointer to an extension-specific structure.
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* pname:features is a structure of type slink:VkPhysicalDeviceFeatures
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describing the fine-grained features of the Vulkan 1.0 API.
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The pname:pNext chain of this structure is used to extend the structure with
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features defined by extensions.
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This structure can: be used in flink:vkGetPhysicalDeviceFeatures2 or can: be
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in the pname:pNext chain of a slink:VkDeviceCreateInfo structure, in which
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case it controls which features are enabled in the device in lieu of
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pname:pEnabledFeatures.
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include::../validity/structs/VkPhysicalDeviceFeatures2.txt[]
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--
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endif::VK_VERSION_1_1,VK_KHR_get_physical_device_properties2[]
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[open,refpage='VkPhysicalDeviceFeatures',desc='Structure describing the fine-grained features that can be supported by an implementation',type='structs']
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--
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The sname:VkPhysicalDeviceFeatures structure is defined as:
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include::../api/structs/VkPhysicalDeviceFeatures.txt[]
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The members of the sname:VkPhysicalDeviceFeatures structure describe the
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following features:
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* [[features-robustBufferAccess]] pname:robustBufferAccess specifies that
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accesses to buffers are bounds-checked against the range of the buffer
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descriptor (as determined by sname:VkDescriptorBufferInfo::pname:range,
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sname:VkBufferViewCreateInfo::pname:range, or the size of the buffer).
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Out of bounds accesses must: not cause application termination, and the
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effects of shader loads, stores, and atomics must: conform to an
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implementation-dependent behavior as described below.
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** A buffer access is considered to be out of bounds if any of the
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following are true:
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*** The pointer was formed by code:OpImageTexelPointer and the coordinate
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is less than zero or greater than or equal to the number of whole
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elements in the bound range.
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*** The pointer was not formed by code:OpImageTexelPointer and the object
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pointed to is not wholly contained within the bound range.
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ifdef::VK_VERSION_1_1,VK_KHR_variable_pointers[]
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This includes accesses performed via _variable pointers_ where the
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buffer descriptor being accessed cannot be statically determined.
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Uninitialized pointers and pointers equal to code:OpConstantNull are
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treated as pointing to a zero-sized object, so all accesses through
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such pointers are considered to be out of bounds.
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endif::VK_VERSION_1_1,VK_KHR_variable_pointers[]
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ifdef::VK_EXT_buffer_device_address[]
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Buffer accesses through buffer device addresses are not
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bounds-checked.
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endif::VK_EXT_buffer_device_address[]
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ifdef::VK_NV_cooperative_matrix[]
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If the
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<<features-cooperativeMatrixRobustBufferAccess,pname:cooperativeMatrixRobustBufferAccess>>
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feature is not enabled, then accesses using
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code:OpCooperativeMatrixLoadNV and code:OpCooperativeMatrixStoreNV
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may: not be bounds-checked.
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endif::VK_NV_cooperative_matrix[]
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+
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[NOTE]
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.Note
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====
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If a SPIR-V code:OpLoad instruction loads a structure and the tail end of
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the structure is out of bounds, then all members of the structure are
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considered out of bounds even if the members at the end are not statically
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used.
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====
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*** If any buffer access in a given SPIR-V block is determined to be out
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of bounds, then any other access of the same type (load, store, or
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atomic) in the same SPIR-V block that accesses an address less than 16
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bytes away from the out of bounds address may: also be considered out
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of bounds.
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** Out-of-bounds buffer loads will return any of the following values:
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*** Values from anywhere within the memory range(s) bound to the buffer
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(possibly including bytes of memory past the end of the buffer, up to
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the end of the bound range).
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*** Zero values, or [eq]#(0,0,0,x)# vectors for vector reads where x is a
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valid value represented in the type of the vector components and may:
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be any of:
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**** 0, 1, or the maximum representable positive integer value, for signed
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or unsigned integer components
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**** 0.0 or 1.0, for floating-point components
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** Out-of-bounds writes may: modify values within the memory range(s)
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bound to the buffer, but must: not modify any other memory.
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** Out-of-bounds atomics may: modify values within the memory range(s)
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bound to the buffer, but must: not modify any other memory, and return
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an undefined: value.
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** Vertex input attributes are considered out of bounds if the offset of
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the attribute in the bound vertex buffer range plus the size of the
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attribute is greater than either:
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+
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*** code:vertexBufferRangeSize, if [eq]#code:bindingStride == 0#; or
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*** [eq]#(code:vertexBufferRangeSize - (code:vertexBufferRangeSize %
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code:bindingStride))#
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+
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where code:vertexBufferRangeSize is the byte size of the memory range bound
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to the vertex buffer binding and code:bindingStride is the byte stride of
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the corresponding vertex input binding.
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Further, if any vertex input attribute using a specific vertex input binding
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is out of bounds, then all vertex input attributes using that vertex input
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binding for that vertex shader invocation are considered out of bounds.
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*** If a vertex input attribute is out of bounds, it will be assigned one
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of the following values:
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**** Values from anywhere within the memory range(s) bound to the buffer,
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converted according to the format of the attribute.
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**** Zero values, format converted according to the format of the
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attribute.
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**** Zero values, or [eq]#(0,0,0,x)# vectors, as described above.
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** If pname:robustBufferAccess is not enabled, applications must: not
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perform out of bounds accesses.
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* [[features-fullDrawIndexUint32]] pname:fullDrawIndexUint32 specifies the
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full 32-bit range of indices is supported for indexed draw calls when
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using a elink:VkIndexType of ename:VK_INDEX_TYPE_UINT32.
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pname:maxDrawIndexedIndexValue is the maximum index value that may: be
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used (aside from the primitive restart index, which is always 2^32^-1
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when the elink:VkIndexType is ename:VK_INDEX_TYPE_UINT32).
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If this feature is supported, pname:maxDrawIndexedIndexValue must: be
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2^32^-1; otherwise it must: be no smaller than 2^24^-1.
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See <<limits-maxDrawIndexedIndexValue,maxDrawIndexedIndexValue>>.
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* [[features-imageCubeArray]] pname:imageCubeArray specifies whether image
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views with a elink:VkImageViewType of
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ename:VK_IMAGE_VIEW_TYPE_CUBE_ARRAY can: be created, and that the
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corresponding code:SampledCubeArray and code:ImageCubeArray SPIR-V
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capabilities can: be used in shader code.
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* [[features-independentBlend]] pname:independentBlend specifies whether
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the sname:VkPipelineColorBlendAttachmentState settings are controlled
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independently per-attachment.
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If this feature is not enabled, the
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sname:VkPipelineColorBlendAttachmentState settings for all color
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attachments must: be identical.
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Otherwise, a different sname:VkPipelineColorBlendAttachmentState can: be
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provided for each bound color attachment.
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* [[features-geometryShader]] pname:geometryShader specifies whether
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geometry shaders are supported.
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If this feature is not enabled, the ename:VK_SHADER_STAGE_GEOMETRY_BIT
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and ename:VK_PIPELINE_STAGE_GEOMETRY_SHADER_BIT enum values must: not be
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used.
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This also specifies whether shader modules can: declare the
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code:Geometry capability.
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* [[features-tessellationShader]] pname:tessellationShader specifies
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whether tessellation control and evaluation shaders are supported.
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If this feature is not enabled, the
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ename:VK_SHADER_STAGE_TESSELLATION_CONTROL_BIT,
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ename:VK_SHADER_STAGE_TESSELLATION_EVALUATION_BIT,
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ename:VK_PIPELINE_STAGE_TESSELLATION_CONTROL_SHADER_BIT,
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ename:VK_PIPELINE_STAGE_TESSELLATION_EVALUATION_SHADER_BIT, and
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ename:VK_STRUCTURE_TYPE_PIPELINE_TESSELLATION_STATE_CREATE_INFO enum
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values must: not be used.
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This also specifies whether shader modules can: declare the
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code:Tessellation capability.
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* [[features-sampleRateShading]] pname:sampleRateShading specifies whether
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<<primsrast-sampleshading,Sample Shading>> and multisample interpolation
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are supported.
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If this feature is not enabled, the pname:sampleShadingEnable member of
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the sname:VkPipelineMultisampleStateCreateInfo structure must: be set to
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ename:VK_FALSE and the pname:minSampleShading member is ignored.
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This also specifies whether shader modules can: declare the
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code:SampleRateShading capability.
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* [[features-dualSrcBlend]] pname:dualSrcBlend specifies whether blend
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operations which take two sources are supported.
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If this feature is not enabled, the ename:VK_BLEND_FACTOR_SRC1_COLOR,
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ename:VK_BLEND_FACTOR_ONE_MINUS_SRC1_COLOR,
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ename:VK_BLEND_FACTOR_SRC1_ALPHA, and
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ename:VK_BLEND_FACTOR_ONE_MINUS_SRC1_ALPHA enum values must: not be used
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as source or destination blending factors.
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See <<framebuffer-dsb>>.
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* [[features-logicOp]] pname:logicOp specifies whether logic operations
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are supported.
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If this feature is not enabled, the pname:logicOpEnable member of the
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sname:VkPipelineColorBlendStateCreateInfo structure must: be set to
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ename:VK_FALSE, and the pname:logicOp member is ignored.
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* [[features-multiDrawIndirect]] pname:multiDrawIndirect specifies whether
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multiple draw indirect is supported.
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If this feature is not enabled, the pname:drawCount parameter to the
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fname:vkCmdDrawIndirect and fname:vkCmdDrawIndexedIndirect commands
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must: be 0 or 1.
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The pname:maxDrawIndirectCount member of the
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sname:VkPhysicalDeviceLimits structure must: also be 1 if this feature
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is not supported.
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See <<limits-maxDrawIndirectCount,maxDrawIndirectCount>>.
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* [[features-drawIndirectFirstInstance]] pname:drawIndirectFirstInstance
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specifies whether indirect draw calls support the pname:firstInstance
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parameter.
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If this feature is not enabled, the pname:firstInstance member of all
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sname:VkDrawIndirectCommand and sname:VkDrawIndexedIndirectCommand
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structures that are provided to the fname:vkCmdDrawIndirect and
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fname:vkCmdDrawIndexedIndirect commands must: be 0.
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* [[features-depthClamp]] pname:depthClamp specifies whether depth
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clamping is supported.
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If this feature is not enabled, the pname:depthClampEnable member of the
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sname:VkPipelineRasterizationStateCreateInfo structure must: be set to
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ename:VK_FALSE.
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Otherwise, setting pname:depthClampEnable to ename:VK_TRUE will enable
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depth clamping.
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* [[features-depthBiasClamp]] pname:depthBiasClamp specifies whether depth
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bias clamping is supported.
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If this feature is not enabled, the pname:depthBiasClamp member of the
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sname:VkPipelineRasterizationStateCreateInfo structure must: be set to
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0.0 unless the ename:VK_DYNAMIC_STATE_DEPTH_BIAS dynamic state is
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enabled, and the pname:depthBiasClamp parameter to
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fname:vkCmdSetDepthBias must: be set to 0.0.
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* [[features-fillModeNonSolid]] pname:fillModeNonSolid specifies whether
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point and wireframe fill modes are supported.
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If this feature is not enabled, the ename:VK_POLYGON_MODE_POINT and
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ename:VK_POLYGON_MODE_LINE enum values must: not be used.
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* [[features-depthBounds]] pname:depthBounds specifies whether depth
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bounds tests are supported.
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If this feature is not enabled, the pname:depthBoundsTestEnable member
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of the sname:VkPipelineDepthStencilStateCreateInfo structure must: be
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set to ename:VK_FALSE.
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When pname:depthBoundsTestEnable is set to ename:VK_FALSE, the
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pname:minDepthBounds and pname:maxDepthBounds members of the
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sname:VkPipelineDepthStencilStateCreateInfo structure are ignored.
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* [[features-wideLines]] pname:wideLines specifies whether lines with
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width other than 1.0 are supported.
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If this feature is not enabled, the pname:lineWidth member of the
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sname:VkPipelineRasterizationStateCreateInfo structure must: be set to
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1.0 unless the ename:VK_DYNAMIC_STATE_LINE_WIDTH dynamic state is
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enabled, and the pname:lineWidth parameter to fname:vkCmdSetLineWidth
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must: be set to 1.0.
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When this feature is supported, the range and granularity of supported
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line widths are indicated by the pname:lineWidthRange and
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pname:lineWidthGranularity members of the sname:VkPhysicalDeviceLimits
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structure, respectively.
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* [[features-largePoints]] pname:largePoints specifies whether points with
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size greater than 1.0 are supported.
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If this feature is not enabled, only a point size of 1.0 written by a
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shader is supported.
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The range and granularity of supported point sizes are indicated by the
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pname:pointSizeRange and pname:pointSizeGranularity members of the
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sname:VkPhysicalDeviceLimits structure, respectively.
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* [[features-alphaToOne]] pname:alphaToOne specifies whether the
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implementation is able to replace the alpha value of the color fragment
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output from the fragment shader with the maximum representable alpha
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value for fixed-point colors or 1.0 for floating-point colors.
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If this feature is not enabled, then the pname:alphaToOneEnable member
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of the sname:VkPipelineMultisampleStateCreateInfo structure must: be set
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to ename:VK_FALSE.
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Otherwise setting pname:alphaToOneEnable to ename:VK_TRUE will enable
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alpha-to-one behavior.
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* [[features-multiViewport]] pname:multiViewport specifies whether more
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than one viewport is supported.
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If this feature is not enabled:
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** The pname:viewportCount and pname:scissorCount members of the
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sname:VkPipelineViewportStateCreateInfo structure must: be set to 1.
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** The pname:firstViewport and pname:viewportCount parameters to the
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fname:vkCmdSetViewport command must: be set to 0 and 1, respectively.
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** The pname:firstScissor and pname:scissorCount parameters to the
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fname:vkCmdSetScissor command must: be set to 0 and 1, respectively.
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ifdef::VK_NV_scissor_exclusive[]
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** The pname:exclusiveScissorCount member of the
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sname:VkPipelineViewportExclusiveScissorStateCreateInfoNV structure
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must: be set to 0 or 1.
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** The pname:firstExclusiveScissor and pname:exclusiveScissorCount
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parameters to the fname:vkCmdSetExclusiveScissorNV command must: be set
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to 0 and 1, respectively.
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endif::VK_NV_scissor_exclusive[]
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* [[features-samplerAnisotropy]] pname:samplerAnisotropy specifies whether
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anisotropic filtering is supported.
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If this feature is not enabled, the pname:anisotropyEnable member of the
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sname:VkSamplerCreateInfo structure must: be ename:VK_FALSE.
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* [[features-textureCompressionETC2]] pname:textureCompressionETC2
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specifies whether all of the ETC2 and EAC compressed texture formats are
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supported.
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If this feature is enabled, then the
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ename:VK_FORMAT_FEATURE_SAMPLED_IMAGE_BIT,
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ename:VK_FORMAT_FEATURE_BLIT_SRC_BIT and
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ename:VK_FORMAT_FEATURE_SAMPLED_IMAGE_FILTER_LINEAR_BIT features must:
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be supported in pname:optimalTilingFeatures for the following formats:
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+
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** ename:VK_FORMAT_ETC2_R8G8B8_UNORM_BLOCK
|
|
** ename:VK_FORMAT_ETC2_R8G8B8_SRGB_BLOCK
|
|
** ename:VK_FORMAT_ETC2_R8G8B8A1_UNORM_BLOCK
|
|
** ename:VK_FORMAT_ETC2_R8G8B8A1_SRGB_BLOCK
|
|
** ename:VK_FORMAT_ETC2_R8G8B8A8_UNORM_BLOCK
|
|
** ename:VK_FORMAT_ETC2_R8G8B8A8_SRGB_BLOCK
|
|
** ename:VK_FORMAT_EAC_R11_UNORM_BLOCK
|
|
** ename:VK_FORMAT_EAC_R11_SNORM_BLOCK
|
|
** ename:VK_FORMAT_EAC_R11G11_UNORM_BLOCK
|
|
** ename:VK_FORMAT_EAC_R11G11_SNORM_BLOCK
|
|
+
|
|
To query for additional properties, or if the feature is not enabled,
|
|
flink:vkGetPhysicalDeviceFormatProperties and
|
|
flink:vkGetPhysicalDeviceImageFormatProperties can: be used to check for
|
|
supported properties of individual formats as normal.
|
|
|
|
* [[features-textureCompressionASTC_LDR]] pname:textureCompressionASTC_LDR
|
|
specifies whether all of the ASTC LDR compressed texture formats are
|
|
supported.
|
|
If this feature is enabled, then the
|
|
ename:VK_FORMAT_FEATURE_SAMPLED_IMAGE_BIT,
|
|
ename:VK_FORMAT_FEATURE_BLIT_SRC_BIT and
|
|
ename:VK_FORMAT_FEATURE_SAMPLED_IMAGE_FILTER_LINEAR_BIT features must:
|
|
be supported in pname:optimalTilingFeatures for the following formats:
|
|
+
|
|
** ename:VK_FORMAT_ASTC_4x4_UNORM_BLOCK
|
|
** ename:VK_FORMAT_ASTC_4x4_SRGB_BLOCK
|
|
** ename:VK_FORMAT_ASTC_5x4_UNORM_BLOCK
|
|
** ename:VK_FORMAT_ASTC_5x4_SRGB_BLOCK
|
|
** ename:VK_FORMAT_ASTC_5x5_UNORM_BLOCK
|
|
** ename:VK_FORMAT_ASTC_5x5_SRGB_BLOCK
|
|
** ename:VK_FORMAT_ASTC_6x5_UNORM_BLOCK
|
|
** ename:VK_FORMAT_ASTC_6x5_SRGB_BLOCK
|
|
** ename:VK_FORMAT_ASTC_6x6_UNORM_BLOCK
|
|
** ename:VK_FORMAT_ASTC_6x6_SRGB_BLOCK
|
|
** ename:VK_FORMAT_ASTC_8x5_UNORM_BLOCK
|
|
** ename:VK_FORMAT_ASTC_8x5_SRGB_BLOCK
|
|
** ename:VK_FORMAT_ASTC_8x6_UNORM_BLOCK
|
|
** ename:VK_FORMAT_ASTC_8x6_SRGB_BLOCK
|
|
** ename:VK_FORMAT_ASTC_8x8_UNORM_BLOCK
|
|
** ename:VK_FORMAT_ASTC_8x8_SRGB_BLOCK
|
|
** ename:VK_FORMAT_ASTC_10x5_UNORM_BLOCK
|
|
** ename:VK_FORMAT_ASTC_10x5_SRGB_BLOCK
|
|
** ename:VK_FORMAT_ASTC_10x6_UNORM_BLOCK
|
|
** ename:VK_FORMAT_ASTC_10x6_SRGB_BLOCK
|
|
** ename:VK_FORMAT_ASTC_10x8_UNORM_BLOCK
|
|
** ename:VK_FORMAT_ASTC_10x8_SRGB_BLOCK
|
|
** ename:VK_FORMAT_ASTC_10x10_UNORM_BLOCK
|
|
** ename:VK_FORMAT_ASTC_10x10_SRGB_BLOCK
|
|
** ename:VK_FORMAT_ASTC_12x10_UNORM_BLOCK
|
|
** ename:VK_FORMAT_ASTC_12x10_SRGB_BLOCK
|
|
** ename:VK_FORMAT_ASTC_12x12_UNORM_BLOCK
|
|
** ename:VK_FORMAT_ASTC_12x12_SRGB_BLOCK
|
|
+
|
|
To query for additional properties, or if the feature is not enabled,
|
|
flink:vkGetPhysicalDeviceFormatProperties and
|
|
flink:vkGetPhysicalDeviceImageFormatProperties can: be used to check for
|
|
supported properties of individual formats as normal.
|
|
|
|
* [[features-textureCompressionBC]] pname:textureCompressionBC specifies
|
|
whether all of the BC compressed texture formats are supported.
|
|
If this feature is enabled, then the
|
|
ename:VK_FORMAT_FEATURE_SAMPLED_IMAGE_BIT,
|
|
ename:VK_FORMAT_FEATURE_BLIT_SRC_BIT and
|
|
ename:VK_FORMAT_FEATURE_SAMPLED_IMAGE_FILTER_LINEAR_BIT features must:
|
|
be supported in pname:optimalTilingFeatures for the following formats:
|
|
+
|
|
** ename:VK_FORMAT_BC1_RGB_UNORM_BLOCK
|
|
** ename:VK_FORMAT_BC1_RGB_SRGB_BLOCK
|
|
** ename:VK_FORMAT_BC1_RGBA_UNORM_BLOCK
|
|
** ename:VK_FORMAT_BC1_RGBA_SRGB_BLOCK
|
|
** ename:VK_FORMAT_BC2_UNORM_BLOCK
|
|
** ename:VK_FORMAT_BC2_SRGB_BLOCK
|
|
** ename:VK_FORMAT_BC3_UNORM_BLOCK
|
|
** ename:VK_FORMAT_BC3_SRGB_BLOCK
|
|
** ename:VK_FORMAT_BC4_UNORM_BLOCK
|
|
** ename:VK_FORMAT_BC4_SNORM_BLOCK
|
|
** ename:VK_FORMAT_BC5_UNORM_BLOCK
|
|
** ename:VK_FORMAT_BC5_SNORM_BLOCK
|
|
** ename:VK_FORMAT_BC6H_UFLOAT_BLOCK
|
|
** ename:VK_FORMAT_BC6H_SFLOAT_BLOCK
|
|
** ename:VK_FORMAT_BC7_UNORM_BLOCK
|
|
** ename:VK_FORMAT_BC7_SRGB_BLOCK
|
|
+
|
|
To query for additional properties, or if the feature is not enabled,
|
|
flink:vkGetPhysicalDeviceFormatProperties and
|
|
flink:vkGetPhysicalDeviceImageFormatProperties can: be used to check for
|
|
supported properties of individual formats as normal.
|
|
|
|
* [[features-occlusionQueryPrecise]] pname:occlusionQueryPrecise specifies
|
|
whether occlusion queries returning actual sample counts are supported.
|
|
Occlusion queries are created in a sname:VkQueryPool by specifying the
|
|
pname:queryType of ename:VK_QUERY_TYPE_OCCLUSION in the
|
|
sname:VkQueryPoolCreateInfo structure which is passed to
|
|
fname:vkCreateQueryPool.
|
|
If this feature is enabled, queries of this type can: enable
|
|
ename:VK_QUERY_CONTROL_PRECISE_BIT in the pname:flags parameter to
|
|
fname:vkCmdBeginQuery.
|
|
If this feature is not supported, the implementation supports only
|
|
boolean occlusion queries.
|
|
When any samples are passed, boolean queries will return a non-zero
|
|
result value, otherwise a result value of zero is returned.
|
|
When this feature is enabled and ename:VK_QUERY_CONTROL_PRECISE_BIT is
|
|
set, occlusion queries will report the actual number of samples passed.
|
|
* [[features-pipelineStatisticsQuery]] pname:pipelineStatisticsQuery
|
|
specifies whether the pipeline statistics queries are supported.
|
|
If this feature is not enabled, queries of type
|
|
ename:VK_QUERY_TYPE_PIPELINE_STATISTICS cannot: be created, and none of
|
|
the elink:VkQueryPipelineStatisticFlagBits bits can: be set in the
|
|
pname:pipelineStatistics member of the sname:VkQueryPoolCreateInfo
|
|
structure.
|
|
* [[features-vertexPipelineStoresAndAtomics]]
|
|
pname:vertexPipelineStoresAndAtomics specifies whether storage buffers
|
|
and images support stores and atomic operations in the vertex,
|
|
tessellation, and geometry shader stages.
|
|
If this feature is not enabled, all storage image, storage texel
|
|
buffers, and storage buffer variables used by these stages in shader
|
|
modules must: be decorated with the code:NonWritable decoration (or the
|
|
code:readonly memory qualifier in GLSL).
|
|
* [[features-fragmentStoresAndAtomics]] pname:fragmentStoresAndAtomics
|
|
specifies whether storage buffers and images support stores and atomic
|
|
operations in the fragment shader stage.
|
|
If this feature is not enabled, all storage image, storage texel
|
|
buffers, and storage buffer variables used by the fragment stage in
|
|
shader modules must: be decorated with the code:NonWritable decoration
|
|
(or the code:readonly memory qualifier in GLSL).
|
|
* [[features-shaderTessellationAndGeometryPointSize]]
|
|
pname:shaderTessellationAndGeometryPointSize specifies whether the
|
|
code:PointSize built-in decoration is available in the tessellation
|
|
control, tessellation evaluation, and geometry shader stages.
|
|
If this feature is not enabled, members decorated with the
|
|
code:PointSize built-in decoration must: not be read from or written to
|
|
and all points written from a tessellation or geometry shader will have
|
|
a size of 1.0.
|
|
This also specifies whether shader modules can: declare the
|
|
code:TessellationPointSize capability for tessellation control and
|
|
evaluation shaders, or if the shader modules can: declare the
|
|
code:GeometryPointSize capability for geometry shaders.
|
|
An implementation supporting this feature must: also support one or both
|
|
of the <<features-tessellationShader,pname:tessellationShader>> or
|
|
<<features-geometryShader,pname:geometryShader>> features.
|
|
* [[features-shaderImageGatherExtended]] pname:shaderImageGatherExtended
|
|
specifies whether the extended set of image gather instructions are
|
|
available in shader code.
|
|
If this feature is not enabled, the code:OpImage*code:Gather
|
|
instructions do not support the code:Offset and code:ConstOffsets
|
|
operands.
|
|
This also specifies whether shader modules can: declare the
|
|
code:ImageGatherExtended capability.
|
|
* [[features-shaderStorageImageExtendedFormats]]
|
|
pname:shaderStorageImageExtendedFormats specifies whether all the
|
|
extended storage image formats are available in shader code.
|
|
If this feature is enabled then the
|
|
ename:VK_FORMAT_FEATURE_STORAGE_IMAGE_BIT feature must: be supported in
|
|
pname:optimalTilingFeatures for all of the extended formats.
|
|
To query for additional properties, or if the feature is not enabled,
|
|
flink:vkGetPhysicalDeviceFormatProperties and
|
|
flink:vkGetPhysicalDeviceImageFormatProperties can: be used to check for
|
|
supported properties of individual formats as normal.
|
|
* [[features-shaderStorageImageMultisample]]
|
|
pname:shaderStorageImageMultisample specifies whether multisampled
|
|
storage images are supported.
|
|
If this feature is not enabled, images that are created with a
|
|
pname:usage that includes ename:VK_IMAGE_USAGE_STORAGE_BIT must: be
|
|
created with pname:samples equal to ename:VK_SAMPLE_COUNT_1_BIT.
|
|
This also specifies whether shader modules can: declare the
|
|
code:StorageImageMultisample capability.
|
|
* [[features-shaderStorageImageReadWithoutFormat]]
|
|
pname:shaderStorageImageReadWithoutFormat specifies whether storage
|
|
images require a format qualifier to be specified when reading from
|
|
storage images.
|
|
If this feature is not enabled, the code:OpImageRead instruction must:
|
|
not have an code:OpTypeImage of code:Unknown.
|
|
This also specifies whether shader modules can: declare the
|
|
code:StorageImageReadWithoutFormat capability.
|
|
* [[features-shaderStorageImageWriteWithoutFormat]]
|
|
pname:shaderStorageImageWriteWithoutFormat specifies whether storage
|
|
images require a format qualifier to be specified when writing to
|
|
storage images.
|
|
If this feature is not enabled, the code:OpImageWrite instruction must:
|
|
not have an code:OpTypeImage of code:Unknown.
|
|
This also specifies whether shader modules can: declare the
|
|
code:StorageImageWriteWithoutFormat capability.
|
|
* [[features-shaderUniformBufferArrayDynamicIndexing]]
|
|
pname:shaderUniformBufferArrayDynamicIndexing specifies whether arrays
|
|
of uniform buffers can: be indexed by _dynamically uniform_ integer
|
|
expressions in shader code.
|
|
If this feature is not enabled, resources with a descriptor type of
|
|
ename:VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER or
|
|
ename:VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER_DYNAMIC must: be indexed only by
|
|
constant integral expressions when aggregated into arrays in shader
|
|
code.
|
|
This also specifies whether shader modules can: declare the
|
|
code:UniformBufferArrayDynamicIndexing capability.
|
|
* [[features-shaderSampledImageArrayDynamicIndexing]]
|
|
pname:shaderSampledImageArrayDynamicIndexing specifies whether arrays of
|
|
samplers or sampled images can: be indexed by dynamically uniform
|
|
integer expressions in shader code.
|
|
If this feature is not enabled, resources with a descriptor type of
|
|
ename:VK_DESCRIPTOR_TYPE_SAMPLER,
|
|
ename:VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, or
|
|
ename:VK_DESCRIPTOR_TYPE_SAMPLED_IMAGE must: be indexed only by constant
|
|
integral expressions when aggregated into arrays in shader code.
|
|
This also specifies whether shader modules can: declare the
|
|
code:SampledImageArrayDynamicIndexing capability.
|
|
* [[features-shaderStorageBufferArrayDynamicIndexing]]
|
|
pname:shaderStorageBufferArrayDynamicIndexing specifies whether arrays
|
|
of storage buffers can: be indexed by dynamically uniform integer
|
|
expressions in shader code.
|
|
If this feature is not enabled, resources with a descriptor type of
|
|
ename:VK_DESCRIPTOR_TYPE_STORAGE_BUFFER or
|
|
ename:VK_DESCRIPTOR_TYPE_STORAGE_BUFFER_DYNAMIC must: be indexed only by
|
|
constant integral expressions when aggregated into arrays in shader
|
|
code.
|
|
This also specifies whether shader modules can: declare the
|
|
code:StorageBufferArrayDynamicIndexing capability.
|
|
* [[features-shaderStorageImageArrayDynamicIndexing]]
|
|
pname:shaderStorageImageArrayDynamicIndexing specifies whether arrays of
|
|
storage images can: be indexed by dynamically uniform integer
|
|
expressions in shader code.
|
|
If this feature is not enabled, resources with a descriptor type of
|
|
ename:VK_DESCRIPTOR_TYPE_STORAGE_IMAGE must: be indexed only by constant
|
|
integral expressions when aggregated into arrays in shader code.
|
|
This also specifies whether shader modules can: declare the
|
|
code:StorageImageArrayDynamicIndexing capability.
|
|
* [[features-shaderClipDistance]] pname:shaderClipDistance specifies
|
|
whether clip distances are supported in shader code.
|
|
If this feature is not enabled, any members decorated with the
|
|
code:ClipDistance built-in decoration must: not be read from or written
|
|
to in shader modules.
|
|
This also specifies whether shader modules can: declare the
|
|
code:ClipDistance capability.
|
|
* [[features-shaderCullDistance]] pname:shaderCullDistance specifies
|
|
whether cull distances are supported in shader code.
|
|
If this feature is not enabled, any members decorated with the
|
|
code:CullDistance built-in decoration must: not be read from or written
|
|
to in shader modules.
|
|
This also specifies whether shader modules can: declare the
|
|
code:CullDistance capability.
|
|
* [[features-shaderFloat64]] pname:shaderFloat64 specifies whether 64-bit
|
|
floats (doubles) are supported in shader code.
|
|
If this feature is not enabled, 64-bit floating-point types must: not be
|
|
used in shader code.
|
|
This also specifies whether shader modules can: declare the code:Float64
|
|
capability.
|
|
* [[features-shaderInt64]] pname:shaderInt64 specifies whether 64-bit
|
|
integers (signed and unsigned) are supported in shader code.
|
|
If this feature is not enabled, 64-bit integer types must: not be used
|
|
in shader code.
|
|
This also specifies whether shader modules can: declare the code:Int64
|
|
capability.
|
|
* [[features-shaderInt16]] pname:shaderInt16 specifies whether 16-bit
|
|
integers (signed and unsigned) are supported in shader code.
|
|
If this feature is not enabled, 16-bit integer types must: not be used
|
|
in shader code.
|
|
This also specifies whether shader modules can: declare the code:Int16
|
|
capability.
|
|
* [[features-shaderResourceResidency]] pname:shaderResourceResidency
|
|
specifies whether image operations that return resource residency
|
|
information are supported in shader code.
|
|
If this feature is not enabled, the code:OpImageSparse* instructions
|
|
must: not be used in shader code.
|
|
This also specifies whether shader modules can: declare the
|
|
code:SparseResidency capability.
|
|
The feature requires at least one of the ptext:sparseResidency* features
|
|
to be supported.
|
|
* [[features-shaderResourceMinLod]] pname:shaderResourceMinLod specifies
|
|
whether image operations that specify the minimum resource LOD are
|
|
supported in shader code.
|
|
If this feature is not enabled, the code:MinLod image operand must: not
|
|
be used in shader code.
|
|
This also specifies whether shader modules can: declare the code:MinLod
|
|
capability.
|
|
* [[features-sparseBinding]] pname:sparseBinding specifies whether
|
|
resource memory can: be managed at opaque sparse block level instead of
|
|
at the object level.
|
|
If this feature is not enabled, resource memory must: be bound only on a
|
|
per-object basis using the fname:vkBindBufferMemory and
|
|
fname:vkBindImageMemory commands.
|
|
In this case, buffers and images must: not be created with
|
|
ename:VK_BUFFER_CREATE_SPARSE_BINDING_BIT and
|
|
ename:VK_IMAGE_CREATE_SPARSE_BINDING_BIT set in the pname:flags member
|
|
of the sname:VkBufferCreateInfo and sname:VkImageCreateInfo structures,
|
|
respectively.
|
|
Otherwise resource memory can: be managed as described in
|
|
<<sparsememory-sparseresourcefeatures,Sparse Resource Features>>.
|
|
* [[features-sparseResidencyBuffer]] pname:sparseResidencyBuffer specifies
|
|
whether the device can: access partially resident buffers.
|
|
If this feature is not enabled, buffers must: not be created with
|
|
ename:VK_BUFFER_CREATE_SPARSE_RESIDENCY_BIT set in the pname:flags
|
|
member of the sname:VkBufferCreateInfo structure.
|
|
* [[features-sparseResidencyImage2D]] pname:sparseResidencyImage2D
|
|
specifies whether the device can: access partially resident 2D images
|
|
with 1 sample per pixel.
|
|
If this feature is not enabled, images with an pname:imageType of
|
|
ename:VK_IMAGE_TYPE_2D and pname:samples set to
|
|
ename:VK_SAMPLE_COUNT_1_BIT must: not be created with
|
|
ename:VK_IMAGE_CREATE_SPARSE_RESIDENCY_BIT set in the pname:flags member
|
|
of the sname:VkImageCreateInfo structure.
|
|
* [[features-sparseResidencyImage3D]] pname:sparseResidencyImage3D
|
|
specifies whether the device can: access partially resident 3D images.
|
|
If this feature is not enabled, images with an pname:imageType of
|
|
ename:VK_IMAGE_TYPE_3D must: not be created with
|
|
ename:VK_IMAGE_CREATE_SPARSE_RESIDENCY_BIT set in the pname:flags member
|
|
of the sname:VkImageCreateInfo structure.
|
|
* [[features-sparseResidency2Samples]] pname:sparseResidency2Samples
|
|
specifies whether the physical device can: access partially resident 2D
|
|
images with 2 samples per pixel.
|
|
If this feature is not enabled, images with an pname:imageType of
|
|
ename:VK_IMAGE_TYPE_2D and pname:samples set to
|
|
ename:VK_SAMPLE_COUNT_2_BIT must: not be created with
|
|
ename:VK_IMAGE_CREATE_SPARSE_RESIDENCY_BIT set in the pname:flags member
|
|
of the sname:VkImageCreateInfo structure.
|
|
* [[features-sparseResidency4Samples]] pname:sparseResidency4Samples
|
|
specifies whether the physical device can: access partially resident 2D
|
|
images with 4 samples per pixel.
|
|
If this feature is not enabled, images with an pname:imageType of
|
|
ename:VK_IMAGE_TYPE_2D and pname:samples set to
|
|
ename:VK_SAMPLE_COUNT_4_BIT must: not be created with
|
|
ename:VK_IMAGE_CREATE_SPARSE_RESIDENCY_BIT set in the pname:flags member
|
|
of the sname:VkImageCreateInfo structure.
|
|
* [[features-sparseResidency8Samples]] pname:sparseResidency8Samples
|
|
specifies whether the physical device can: access partially resident 2D
|
|
images with 8 samples per pixel.
|
|
If this feature is not enabled, images with an pname:imageType of
|
|
ename:VK_IMAGE_TYPE_2D and pname:samples set to
|
|
ename:VK_SAMPLE_COUNT_8_BIT must: not be created with
|
|
ename:VK_IMAGE_CREATE_SPARSE_RESIDENCY_BIT set in the pname:flags member
|
|
of the sname:VkImageCreateInfo structure.
|
|
* [[features-sparseResidency16Samples]] pname:sparseResidency16Samples
|
|
specifies whether the physical device can: access partially resident 2D
|
|
images with 16 samples per pixel.
|
|
If this feature is not enabled, images with an pname:imageType of
|
|
ename:VK_IMAGE_TYPE_2D and pname:samples set to
|
|
ename:VK_SAMPLE_COUNT_16_BIT must: not be created with
|
|
ename:VK_IMAGE_CREATE_SPARSE_RESIDENCY_BIT set in the pname:flags member
|
|
of the sname:VkImageCreateInfo structure.
|
|
* [[features-sparseResidencyAliased]] pname:sparseResidencyAliased
|
|
specifies whether the physical device can: correctly access data aliased
|
|
into multiple locations.
|
|
If this feature is not enabled, the
|
|
ename:VK_BUFFER_CREATE_SPARSE_ALIASED_BIT and
|
|
ename:VK_IMAGE_CREATE_SPARSE_ALIASED_BIT enum values must: not be used
|
|
in pname:flags members of the sname:VkBufferCreateInfo and
|
|
sname:VkImageCreateInfo structures, respectively.
|
|
* [[features-variableMultisampleRate]] pname:variableMultisampleRate
|
|
specifies whether all pipelines that will be bound to a command buffer
|
|
during a subpass with no attachments must: have the same value for
|
|
sname:VkPipelineMultisampleStateCreateInfo::pname:rasterizationSamples.
|
|
If set to ename:VK_TRUE, the implementation supports variable
|
|
multisample rates in a subpass with no attachments.
|
|
If set to ename:VK_FALSE, then all pipelines bound in such a subpass
|
|
must: have the same multisample rate.
|
|
This has no effect in situations where a subpass uses any attachments.
|
|
* [[features-inheritedQueries]] pname:inheritedQueries specifies whether a
|
|
secondary command buffer may: be executed while a query is active.
|
|
|
|
include::../validity/structs/VkPhysicalDeviceFeatures.txt[]
|
|
--
|
|
|
|
ifdef::VK_VERSION_1_1,VK_KHR_variable_pointers[]
|
|
|
|
[open,refpage='VkPhysicalDeviceVariablePointersFeatures',desc='Structure describing variable pointers features that can be supported by an implementation',type='structs']
|
|
--
|
|
The sname:VkPhysicalDeviceVariablePointersFeatures structure is defined as:
|
|
|
|
include::../api/structs/VkPhysicalDeviceVariablePointersFeatures.txt[]
|
|
|
|
ifdef::VK_KHR_variable_pointers[]
|
|
or the equivalent
|
|
|
|
include::../api/structs/VkPhysicalDeviceVariablePointersFeaturesKHR.txt[]
|
|
endif::VK_KHR_variable_pointers[]
|
|
|
|
The members of the sname:VkPhysicalDeviceVariablePointersFeatures structure
|
|
describe the following features:
|
|
|
|
* [[features-variablePointersStorageBuffer]]
|
|
pname:variablePointersStorageBuffer specifies whether the implementation
|
|
supports the SPIR-V `VariablePointersStorageBuffer` capability.
|
|
When this feature is not enabled, shader modules must: not declare the
|
|
`SPV_KHR_variable_pointers` extension or the
|
|
`VariablePointersStorageBuffer` capability.
|
|
* [[features-variablePointers]] pname:variablePointers specifies whether
|
|
the implementation supports the SPIR-V `VariablePointers` capability.
|
|
When this feature is not enabled, shader modules must: not declare the
|
|
`VariablePointers` capability.
|
|
|
|
If the sname:VkPhysicalDeviceVariablePointersFeatures structure is included
|
|
in the pname:pNext chain of slink:VkPhysicalDeviceFeatures2, it is filled
|
|
with values indicating whether each feature is supported.
|
|
sname:VkPhysicalDeviceVariablePointersFeatures can: also be used in the
|
|
pname:pNext chain of slink:VkDeviceCreateInfo to enable the features.
|
|
|
|
.Valid Usage
|
|
****
|
|
* [[VUID-VkPhysicalDeviceVariablePointersFeatures-variablePointers-01431]]
|
|
If pname:variablePointers is enabled then
|
|
pname:variablePointersStorageBuffer must: also be enabled.
|
|
****
|
|
|
|
include::../validity/structs/VkPhysicalDeviceVariablePointersFeatures.txt[]
|
|
--
|
|
|
|
endif::VK_VERSION_1_1,VK_KHR_variable_pointers[]
|
|
|
|
ifdef::VK_VERSION_1_1,VK_KHR_multiview[]
|
|
|
|
[open,refpage='VkPhysicalDeviceMultiviewFeatures',desc='Structure describing multiview features that can be supported by an implementation',type='structs']
|
|
--
|
|
The sname:VkPhysicalDeviceMultiviewFeatures structure is defined as:
|
|
|
|
include::../api/structs/VkPhysicalDeviceMultiviewFeatures.txt[]
|
|
|
|
ifdef::VK_KHR_multiview[]
|
|
or the equivalent
|
|
|
|
include::../api/structs/VkPhysicalDeviceMultiviewFeaturesKHR.txt[]
|
|
endif::VK_KHR_multiview[]
|
|
|
|
The members of the sname:VkPhysicalDeviceMultiviewFeatures structure
|
|
describe the following features:
|
|
|
|
* [[features-multiview]] pname:multiview specifies whether the
|
|
implementation supports multiview rendering within a render pass.
|
|
If this feature is not enabled, the view mask of each subpass must:
|
|
always be zero.
|
|
* [[features-multiview-gs]] pname:multiviewGeometryShader specifies
|
|
whether the implementation supports multiview rendering within a render
|
|
pass, with <<geometry,geometry shaders>>.
|
|
If this feature is not enabled, then a pipeline compiled against a
|
|
subpass with a non-zero view mask must: not include a geometry shader.
|
|
* [[features-multiview-tess]] pname:multiviewTessellationShader specifies
|
|
whether the implementation supports multiview rendering within a render
|
|
pass, with <<tessellation,tessellation shaders>>.
|
|
If this feature is not enabled, then a pipeline compiled against a
|
|
subpass with a non-zero view mask must: not include any tessellation
|
|
shaders.
|
|
|
|
If the sname:VkPhysicalDeviceMultiviewFeatures structure is included in the
|
|
pname:pNext chain of slink:VkPhysicalDeviceFeatures2, it is filled with
|
|
values indicating whether each feature is supported.
|
|
sname:VkPhysicalDeviceMultiviewFeatures can: also be used in the pname:pNext
|
|
chain of slink:VkDeviceCreateInfo to enable the features.
|
|
|
|
.Valid Usage
|
|
****
|
|
* [[VUID-VkPhysicalDeviceMultiviewFeatures-multiviewGeometryShader-00580]]
|
|
If pname:multiviewGeometryShader is enabled then pname:multiview must:
|
|
also be enabled.
|
|
* [[VUID-VkPhysicalDeviceMultiviewFeatures-multiviewTessellationShader-00581]]
|
|
If pname:multiviewTessellationShader is enabled then pname:multiview
|
|
must: also be enabled.
|
|
****
|
|
|
|
include::../validity/structs/VkPhysicalDeviceMultiviewFeatures.txt[]
|
|
--
|
|
|
|
endif::VK_VERSION_1_1,VK_KHR_multiview[]
|
|
|
|
ifdef::VK_KHR_shader_atomic_int64[]
|
|
[open,refpage='VkPhysicalDeviceShaderAtomicInt64FeaturesKHR',desc='Structure describing features supported by VK_KHR_shader_atomic_int64',type='structs']
|
|
--
|
|
To query 64-bit atomic support for signed and unsigned integers call
|
|
flink:vkGetPhysicalDeviceFeatures2 with a
|
|
sname:VkPhysicalDeviceShaderAtomicInt64FeaturesKHR structure included in the
|
|
pname:pNext chain of its pname:pFeatures parameter.
|
|
|
|
The slink:VkPhysicalDeviceShaderAtomicInt64FeaturesKHR structure is defined
|
|
as:
|
|
|
|
include::../api/structs/VkPhysicalDeviceShaderAtomicInt64FeaturesKHR.txt[]
|
|
|
|
* pname:sType is the type of this structure.
|
|
* pname:pNext is `NULL` or a pointer to an extension-specific structure.
|
|
* [[features-shaderBufferInt64Atomics]] pname:shaderBufferInt64Atomics
|
|
indicates whether shaders can: support 64-bit unsigned and signed
|
|
integer atomic operations on buffers.
|
|
* [[features-shaderSharedInt64Atomics]] pname:shaderSharedInt64Atomics
|
|
indicates whether shaders can: support 64-bit unsigned and signed
|
|
integer atomic operations on shared memory.
|
|
|
|
include::../validity/structs/VkPhysicalDeviceShaderAtomicInt64FeaturesKHR.txt[]
|
|
--
|
|
endif::VK_KHR_shader_atomic_int64[]
|
|
|
|
ifdef::VK_KHR_8bit_storage[]
|
|
[open,refpage='VkPhysicalDevice8BitStorageFeaturesKHR',desc='Structure describing features supported by VK_KHR_8bit_storage',type='structs']
|
|
--
|
|
To query 8-bit storage features additionally supported call
|
|
flink:vkGetPhysicalDeviceFeatures2 with a
|
|
sname:VkPhysicalDevice8BitStorageFeaturesKHR structure included in the
|
|
pname:pNext chain of its pname:pFeatures parameter.
|
|
The sname:VkPhysicalDevice8BitStorageFeaturesKHR structure can: also be in
|
|
the pname:pNext chain of a slink:VkDeviceCreateInfo structure, in which case
|
|
it controls which additional features are enabled in the device.
|
|
|
|
The slink:VkPhysicalDevice8BitStorageFeaturesKHR structure is defined as:
|
|
|
|
include::../api/structs/VkPhysicalDevice8BitStorageFeaturesKHR.txt[]
|
|
|
|
* pname:sType is the type of this structure.
|
|
* pname:pNext is `NULL` or a pointer to an extension-specific structure.
|
|
* [[features-storageBuffer8BitAccess]] pname:storageBuffer8BitAccess
|
|
indicates whether objects in the code:StorageBuffer
|
|
ifdef::VK_EXT_buffer_device_address[]
|
|
or code:PhysicalStorageBufferEXT
|
|
endif::VK_EXT_buffer_device_address[]
|
|
storage class with the code:Block decoration can: have 8-bit integer
|
|
members.
|
|
If this feature is not enabled, 8-bit integer members must: not be used
|
|
in such objects.
|
|
This also indicates whether shader modules can: declare the
|
|
code:StorageBuffer8BitAccess capability.
|
|
* [[features-uniformAndStorageBuffer8BitAccess]]
|
|
pname:uniformAndStorageBuffer8BitAccess indicates whether objects in the
|
|
code:Uniform storage class with the code:Block decoration and in the
|
|
code:StorageBuffer
|
|
ifdef::VK_EXT_buffer_device_address[]
|
|
or code:PhysicalStorageBufferEXT
|
|
endif::VK_EXT_buffer_device_address[]
|
|
storage class with the same decoration can: have 8-bit integer members.
|
|
If this feature is not enabled, 8-bit integer members must: not be used
|
|
in such objects.
|
|
This also indicates whether shader modules can: declare the
|
|
code:UniformAndStorageBuffer8BitAccess capability.
|
|
* [[features-storagePushConstant8]] pname:storagePushConstant8 indicates
|
|
whether objects in the code:PushConstant storage class can: have 8-bit
|
|
integer members.
|
|
If this feature is not enabled, 8-bit integer members must: not be used
|
|
in such objects.
|
|
This also indicates whether shader modules can: declare the
|
|
code:StoragePushConstant8 capability.
|
|
|
|
include::../validity/structs/VkPhysicalDevice8BitStorageFeaturesKHR.txt[]
|
|
--
|
|
endif::VK_KHR_8bit_storage[]
|
|
|
|
ifdef::VK_VERSION_1_1,VK_KHR_16bit_storage[]
|
|
[open,refpage='VkPhysicalDevice16BitStorageFeatures',desc='Structure describing features supported by VK_KHR_16bit_storage',type='structs']
|
|
--
|
|
To query 16-bit storage features additionally supported call
|
|
flink:vkGetPhysicalDeviceFeatures2 with a
|
|
sname:VkPhysicalDevice16BitStorageFeatures structure included in the
|
|
pname:pNext chain of its pname:pFeatures parameter.
|
|
The sname:VkPhysicalDevice16BitStorageFeatures structure can: also be in the
|
|
pname:pNext chain of a slink:VkDeviceCreateInfo structure, in which case it
|
|
controls which additional features are enabled in the device.
|
|
|
|
The slink:VkPhysicalDevice16BitStorageFeatures structure is defined as:
|
|
|
|
include::../api/structs/VkPhysicalDevice16BitStorageFeatures.txt[]
|
|
|
|
ifdef::VK_KHR_16bit_storage[]
|
|
or the equivalent
|
|
|
|
include::../api/structs/VkPhysicalDevice16BitStorageFeaturesKHR.txt[]
|
|
endif::VK_KHR_16bit_storage[]
|
|
|
|
* pname:sType is the type of this structure.
|
|
* pname:pNext is `NULL` or a pointer to an extension-specific structure.
|
|
* [[features-storageBuffer16BitAccess]] pname:storageBuffer16BitAccess
|
|
specifies whether objects in the code:StorageBuffer
|
|
ifdef::VK_EXT_buffer_device_address[]
|
|
or code:PhysicalStorageBufferEXT
|
|
endif::VK_EXT_buffer_device_address[]
|
|
storage class with the code:Block decoration can: have 16-bit integer
|
|
and 16-bit floating-point members.
|
|
If this feature is not enabled, 16-bit integer or 16-bit floating-point
|
|
members must: not be used in such objects.
|
|
This also specifies whether shader modules can: declare the
|
|
code:StorageBuffer16BitAccess capability.
|
|
* [[features-uniformAndStorageBuffer16BitAccess]]
|
|
pname:uniformAndStorageBuffer16BitAccess specifies whether objects in
|
|
the code:Uniform storage class with the code:Block decoration and in the
|
|
code:StorageBuffer
|
|
ifdef::VK_EXT_buffer_device_address[]
|
|
or code:PhysicalStorageBufferEXT
|
|
endif::VK_EXT_buffer_device_address[]
|
|
storage class with the same decoration can: have 16-bit integer and
|
|
16-bit floating-point members.
|
|
If this feature is not enabled, 16-bit integer or 16-bit floating-point
|
|
members must: not be used in such objects.
|
|
This also specifies whether shader modules can: declare the
|
|
code:UniformAndStorageBuffer16BitAccess capability.
|
|
* [[features-storagePushConstant16]] pname:storagePushConstant16 specifies
|
|
whether objects in the code:PushConstant storage class can: have 16-bit
|
|
integer and 16-bit floating-point members.
|
|
If this feature is not enabled, 16-bit integer or floating-point members
|
|
must: not be used in such objects.
|
|
This also specifies whether shader modules can: declare the
|
|
code:StoragePushConstant16 capability.
|
|
* [[features-storageInputOutput16]] pname:storageInputOutput16 specifies
|
|
whether objects in the code:Input and code:Output storage classes can:
|
|
have 16-bit integer and 16-bit floating-point members.
|
|
If this feature is not enabled, 16-bit integer or 16-bit floating-point
|
|
members must: not be used in such objects.
|
|
This also specifies whether shader modules can: declare the
|
|
code:StorageInputOutput16 capability.
|
|
|
|
include::../validity/structs/VkPhysicalDevice16BitStorageFeatures.txt[]
|
|
--
|
|
endif::VK_VERSION_1_1,VK_KHR_16bit_storage[]
|
|
|
|
ifdef::VK_KHR_shader_float16_int8[]
|
|
[open,refpage='VkPhysicalDeviceFloat16Int8FeaturesKHR',desc='Structure describing features supported by VK_KHR_shader_float16_int8',type='structs']
|
|
--
|
|
To query features additionally supported by the
|
|
`<<VK_KHR_shader_float16_int8>>` extension, call
|
|
flink:vkGetPhysicalDeviceFeatures2KHR with a
|
|
sname:VkPhysicalDeviceFloat16Int8FeaturesKHR structure in the pname:pNext
|
|
chain.
|
|
The sname:VkPhysicalDeviceFloat16Int8FeaturesKHR structure can: also be in
|
|
the pname:pNext chain of a slink:VkDeviceCreateInfo structure, in which case
|
|
it controls which additional features are enabled in the device.
|
|
|
|
The sname:VkPhysicalDeviceFloat16Int8FeaturesKHR structure is defined as:
|
|
|
|
include::../api/structs/VkPhysicalDeviceFloat16Int8FeaturesKHR.txt[]
|
|
|
|
* pname:sType is the type of this structure.
|
|
* pname:pNext is `NULL` or a pointer to an extension-specific structure.
|
|
* [[features-shaderFloat16]] pname:shaderFloat16 indicates whether 16-bit
|
|
floats (halfs) are supported in shader code.
|
|
This also indicates whether shader modules can: declare the code:Float16
|
|
capability.
|
|
* [[features-shaderInt8]] pname:shaderInt8 indicates whether 8-bit
|
|
integers (signed and unsigned) are supported in shader code.
|
|
This also indicates whether shader modules can: declare the code:Int8
|
|
capability.
|
|
|
|
include::../validity/structs/VkPhysicalDeviceFloat16Int8FeaturesKHR.txt[]
|
|
--
|
|
endif::VK_KHR_shader_float16_int8[]
|
|
|
|
ifdef::VK_VERSION_1_1,VK_KHR_sampler_ycbcr_conversion[]
|
|
[open,refpage='VkPhysicalDeviceSamplerYcbcrConversionFeatures',desc='Structure describing Y\'CbCr conversion features that can be supported by an implementation',type='structs']
|
|
--
|
|
The sname:VkPhysicalDeviceSamplerYcbcrConversionFeatures structure is
|
|
defined as:
|
|
|
|
include::../api/structs/VkPhysicalDeviceSamplerYcbcrConversionFeatures.txt[]
|
|
|
|
ifdef::VK_KHR_sampler_ycbcr_conversion[]
|
|
or the equivalent
|
|
|
|
include::../api/structs/VkPhysicalDeviceSamplerYcbcrConversionFeaturesKHR.txt[]
|
|
endif::VK_KHR_sampler_ycbcr_conversion[]
|
|
|
|
The members of the sname:VkPhysicalDeviceSamplerYcbcrConversionFeatures
|
|
structure describe the following feature:
|
|
|
|
* [[features-sampler-YCbCr-conversion]] pname:samplerYcbcrConversion
|
|
specifies whether the implementation supports
|
|
<<samplers-YCbCr-conversion,sampler Y'C~B~C~R~ conversion>>.
|
|
If pname:samplerYcbcrConversion is ename:VK_FALSE, sampler Y'C~B~C~R~
|
|
conversion is not supported, and samplers using sampler Y'C~B~C~R~
|
|
conversion must: not be used.
|
|
|
|
include::../validity/structs/VkPhysicalDeviceSamplerYcbcrConversionFeatures.txt[]
|
|
--
|
|
|
|
endif::VK_VERSION_1_1,VK_KHR_sampler_ycbcr_conversion[]
|
|
|
|
ifdef::VK_VERSION_1_1[]
|
|
|
|
[open,refpage='VkPhysicalDeviceProtectedMemoryFeatures',desc='Structure describing protected memory features that can be supported by an implementation',type='structs']
|
|
--
|
|
The sname:VkPhysicalDeviceProtectedMemoryFeatures structure is defined as:
|
|
|
|
include::../api/structs/VkPhysicalDeviceProtectedMemoryFeatures.txt[]
|
|
|
|
* [[features-features-protectedMemory]] pname:protectedMemory specifies
|
|
whether protected memory is supported.
|
|
|
|
If the sname:VkPhysicalDeviceProtectedMemoryFeatures structure is included
|
|
in the pname:pNext chain of slink:VkPhysicalDeviceFeatures2, it is filled
|
|
with a value indicating whether the feature is supported.
|
|
|
|
include::../validity/structs/VkPhysicalDeviceProtectedMemoryFeatures.txt[]
|
|
--
|
|
|
|
endif::VK_VERSION_1_1[]
|
|
|
|
ifdef::VK_EXT_blend_operation_advanced[]
|
|
|
|
[open,refpage='VkPhysicalDeviceBlendOperationAdvancedFeaturesEXT',desc='Structure describing advanced blending features that can be supported by an implementation',type='structs']
|
|
--
|
|
The sname:VkPhysicalDeviceBlendOperationAdvancedFeaturesEXT structure is
|
|
defined as:
|
|
|
|
include::../api/structs/VkPhysicalDeviceBlendOperationAdvancedFeaturesEXT.txt[]
|
|
|
|
The members of the sname:VkPhysicalDeviceBlendOperationAdvancedFeaturesEXT
|
|
structure describe the following features:
|
|
|
|
* [[features-advancedBlendCoherentOperations]]
|
|
pname:advancedBlendCoherentOperations specifies whether blending using
|
|
<<framebuffer-blend-advanced,advanced blend operations>> is guaranteed
|
|
to execute atomically and in <<drawing-primitive-order, primitive
|
|
order>>.
|
|
If this is ename:VK_TRUE,
|
|
ename:VK_ACCESS_COLOR_ATTACHMENT_READ_NONCOHERENT_BIT_EXT is treated the
|
|
same as ename:VK_ACCESS_COLOR_ATTACHMENT_READ_BIT, and advanced blending
|
|
needs no additional synchronization over basic blending.
|
|
If this is ename:VK_FALSE, then memory dependencies are required to
|
|
guarantee order between two advanced blending operations that occur on
|
|
the same sample.
|
|
|
|
If the sname:VkPhysicalDeviceBlendOperationAdvancedFeaturesEXT structure is
|
|
included in the pname:pNext chain of slink:VkPhysicalDeviceFeatures2, it is
|
|
filled with values indicating whether each feature is supported.
|
|
sname:VkPhysicalDeviceBlendOperationAdvancedFeaturesEXT can: also be used in
|
|
pname:pNext chain of slink:VkDeviceCreateInfo to enable the features.
|
|
|
|
include::../validity/structs/VkPhysicalDeviceBlendOperationAdvancedFeaturesEXT.txt[]
|
|
--
|
|
|
|
endif::VK_EXT_blend_operation_advanced[]
|
|
|
|
ifdef::VK_EXT_conditional_rendering[]
|
|
|
|
[open,refpage='VkPhysicalDeviceConditionalRenderingFeaturesEXT',desc='Structure describing if a secondary command buffer can be executed if conditional rendering is active in the primary command buffer',type='structs']
|
|
--
|
|
The sname:VkPhysicalDeviceConditionalRenderingFeaturesEXT structure is
|
|
defined as:
|
|
|
|
include::../api/structs/VkPhysicalDeviceConditionalRenderingFeaturesEXT.txt[]
|
|
|
|
* pname:sType is the type of this structure.
|
|
* pname:pNext is `NULL` or a pointer to an extension-specific structure.
|
|
* [[features-conditionalRendering]] pname:conditionalRendering specifies
|
|
whether conditional rendering is supported.
|
|
* [[features-inheritedConditionalRendering]]
|
|
pname:inheritedConditionalRendering specifies whether a secondary
|
|
command buffer can: be executed while conditional rendering is active in
|
|
the primary command buffer.
|
|
|
|
If the sname:VkPhysicalDeviceConditionalRenderingFeaturesEXT structure is
|
|
included in the pname:pNext chain of slink:VkPhysicalDeviceFeatures2, it is
|
|
filled with values indicating the implementation-dependent behavior.
|
|
sname:VkPhysicalDeviceConditionalRenderingFeaturesEXT can: also be used in
|
|
pname:pNext chain of slink:VkDeviceCreateInfo to enable the features.
|
|
|
|
include::../validity/structs/VkPhysicalDeviceConditionalRenderingFeaturesEXT.txt[]
|
|
--
|
|
|
|
endif::VK_EXT_conditional_rendering[]
|
|
|
|
ifdef::VK_VERSION_1_1[]
|
|
[open,refpage='VkPhysicalDeviceShaderDrawParametersFeatures',desc='Structure describing shader draw parameter features that can be supported by an implementation',type='structs']
|
|
--
|
|
The sname:VkPhysicalDeviceShaderDrawParametersFeatures structure is defined
|
|
as:
|
|
|
|
include::../api/structs/VkPhysicalDeviceShaderDrawParametersFeatures.txt[]
|
|
|
|
* [[features-shaderDrawParameters]] pname:shaderDrawParameters specifies
|
|
whether shader draw parameters are supported.
|
|
|
|
If the sname:VkPhysicalDeviceShaderDrawParametersFeatures structure is
|
|
included in the pname:pNext chain of slink:VkPhysicalDeviceFeatures2, it is
|
|
filled with a value indicating whether the feature is supported.
|
|
|
|
include::../validity/structs/VkPhysicalDeviceShaderDrawParametersFeatures.txt[]
|
|
--
|
|
endif::VK_VERSION_1_1[]
|
|
|
|
ifdef::VK_NV_mesh_shader[]
|
|
[open,refpage='VkPhysicalDeviceMeshShaderFeaturesNV',desc='Structure describing mesh shading features that can be supported by an implementation',type='structs']
|
|
--
|
|
The sname:VkPhysicalDeviceMeshShaderFeaturesNV structure is defined as:
|
|
|
|
include::../api/structs/VkPhysicalDeviceMeshShaderFeaturesNV.txt[]
|
|
|
|
* [[features-taskShader]] pname:taskShader indicates whether the task
|
|
shader stage is supported.
|
|
* [[features-meshShader]] pname:meshShader indicates whether the mesh
|
|
shader stage is supported.
|
|
|
|
If the sname:VkPhysicalDeviceMeshShaderFeaturesNV structure is included in
|
|
the pname:pNext chain of slink:VkPhysicalDeviceFeatures2, it is filled with
|
|
a value indicating whether the feature is supported.
|
|
sname:VkPhysicalDeviceMeshShaderFeaturesNV can: also be used in pname:pNext
|
|
chain of slink:VkDeviceCreateInfo to enable the features.
|
|
|
|
include::../validity/structs/VkPhysicalDeviceMeshShaderFeaturesNV.txt[]
|
|
--
|
|
endif::VK_NV_mesh_shader[]
|
|
|
|
ifdef::VK_EXT_descriptor_indexing[]
|
|
|
|
[open,refpage='VkPhysicalDeviceDescriptorIndexingFeaturesEXT',desc='Structure describing descriptor indexing features that can be supported by an implementation',type='structs']
|
|
--
|
|
The sname:VkPhysicalDeviceDescriptorIndexingFeaturesEXT structure is defined
|
|
as:
|
|
|
|
include::../api/structs/VkPhysicalDeviceDescriptorIndexingFeaturesEXT.txt[]
|
|
|
|
The members of the sname:VkPhysicalDeviceDescriptorIndexingFeaturesEXT
|
|
structure describe the following features:
|
|
|
|
* [[features-shaderInputAttachmentArrayDynamicIndexing]]
|
|
pname:shaderInputAttachmentArrayDynamicIndexing indicates whether arrays
|
|
of input attachments can: be indexed by dynamically uniform integer
|
|
expressions in shader code.
|
|
If this feature is not enabled, resources with a descriptor type of
|
|
ename:VK_DESCRIPTOR_TYPE_INPUT_ATTACHMENT must: be indexed only by
|
|
constant integral expressions when aggregated into arrays in shader
|
|
code.
|
|
This also indicates whether shader modules can: declare the
|
|
code:InputAttachmentArrayDynamicIndexingEXT capability.
|
|
* [[features-shaderUniformTexelBufferArrayDynamicIndexing]]
|
|
pname:shaderUniformTexelBufferArrayDynamicIndexing indicates whether
|
|
arrays of uniform texel buffers can: be indexed by dynamically uniform
|
|
integer expressions in shader code.
|
|
If this feature is not enabled, resources with a descriptor type of
|
|
ename:VK_DESCRIPTOR_TYPE_UNIFORM_TEXEL_BUFFER must: be indexed only by
|
|
constant integral expressions when aggregated into arrays in shader
|
|
code.
|
|
This also indicates whether shader modules can: declare the
|
|
code:UniformTexelBufferArrayDynamicIndexingEXT capability.
|
|
* [[features-shaderStorageTexelBufferArrayDynamicIndexing]]
|
|
pname:shaderStorageTexelBufferArrayDynamicIndexing indicates whether
|
|
arrays of storage texel buffers can: be indexed by dynamically uniform
|
|
integer expressions in shader code.
|
|
If this feature is not enabled, resources with a descriptor type of
|
|
ename:VK_DESCRIPTOR_TYPE_STORAGE_TEXEL_BUFFER must: be indexed only by
|
|
constant integral expressions when aggregated into arrays in shader
|
|
code.
|
|
This also indicates whether shader modules can: declare the
|
|
code:StorageTexelBufferArrayDynamicIndexingEXT capability.
|
|
* [[features-shaderUniformBufferArrayNonUniformIndexing]]
|
|
pname:shaderUniformBufferArrayNonUniformIndexing indicates whether
|
|
arrays of uniform buffers can: be indexed by non-uniform integer
|
|
expressions in shader code.
|
|
If this feature is not enabled, resources with a descriptor type of
|
|
ename:VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER or
|
|
ename:VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER_DYNAMIC must: not be indexed by
|
|
non-uniform integer expressions when aggregated into arrays in shader
|
|
code.
|
|
This also indicates whether shader modules can: declare the
|
|
code:UniformBufferArrayNonUniformIndexingEXT capability.
|
|
* [[features-shaderSampledImageArrayNonUniformIndexing]]
|
|
pname:shaderSampledImageArrayNonUniformIndexing indicates whether arrays
|
|
of samplers or sampled images can: be indexed by non-uniform integer
|
|
expressions in shader code.
|
|
If this feature is not enabled, resources with a descriptor type of
|
|
ename:VK_DESCRIPTOR_TYPE_SAMPLER,
|
|
ename:VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, or
|
|
ename:VK_DESCRIPTOR_TYPE_SAMPLED_IMAGE must: not be indexed by
|
|
non-uniform integer expressions when aggregated into arrays in shader
|
|
code.
|
|
This also indicates whether shader modules can: declare the
|
|
code:SampledImageArrayNonUniformIndexingEXT capability.
|
|
* [[features-shaderStorageBufferArrayNonUniformIndexing]]
|
|
pname:shaderStorageBufferArrayNonUniformIndexing indicates whether
|
|
arrays of storage buffers can: be indexed by non-uniform integer
|
|
expressions in shader code.
|
|
If this feature is not enabled, resources with a descriptor type of
|
|
ename:VK_DESCRIPTOR_TYPE_STORAGE_BUFFER or
|
|
ename:VK_DESCRIPTOR_TYPE_STORAGE_BUFFER_DYNAMIC must: not be indexed by
|
|
non-uniform integer expressions when aggregated into arrays in shader
|
|
code.
|
|
This also indicates whether shader modules can: declare the
|
|
code:StorageBufferArrayNonUniformIndexingEXT capability.
|
|
* [[features-shaderStorageImageArrayNonUniformIndexing]]
|
|
pname:shaderStorageImageArrayNonUniformIndexing indicates whether arrays
|
|
of storage images can: be indexed by non-uniform integer expressions in
|
|
shader code.
|
|
If this feature is not enabled, resources with a descriptor type of
|
|
ename:VK_DESCRIPTOR_TYPE_STORAGE_IMAGE must: not be indexed by
|
|
non-uniform integer expressions when aggregated into arrays in shader
|
|
code.
|
|
This also indicates whether shader modules can: declare the
|
|
code:StorageImageArrayNonUniformIndexingEXT capability.
|
|
* [[features-shaderInputAttachmentArrayNonUniformIndexing]]
|
|
pname:shaderInputAttachmentArrayNonUniformIndexing indicates whether
|
|
arrays of input attachments can: be indexed by non-uniform integer
|
|
expressions in shader code.
|
|
If this feature is not enabled, resources with a descriptor type of
|
|
ename:VK_DESCRIPTOR_TYPE_INPUT_ATTACHMENT must: not be indexed by
|
|
non-uniform integer expressions when aggregated into arrays in shader
|
|
code.
|
|
This also indicates whether shader modules can: declare the
|
|
code:InputAttachmentArrayNonUniformIndexingEXT capability.
|
|
* [[features-shaderUniformTexelBufferArrayNonUniformIndexing]]
|
|
pname:shaderUniformTexelBufferArrayNonUniformIndexing indicates whether
|
|
arrays of uniform texel buffers can: be indexed by non-uniform integer
|
|
expressions in shader code.
|
|
If this feature is not enabled, resources with a descriptor type of
|
|
ename:VK_DESCRIPTOR_TYPE_UNIFORM_TEXEL_BUFFER must: not be indexed by
|
|
non-uniform integer expressions when aggregated into arrays in shader
|
|
code.
|
|
This also indicates whether shader modules can: declare the
|
|
code:UniformTexelBufferArrayNonUniformIndexingEXT capability.
|
|
* [[features-shaderStorageTexelBufferArrayNonUniformIndexing]]
|
|
pname:shaderStorageTexelBufferArrayNonUniformIndexing indicates whether
|
|
arrays of storage texel buffers can: be indexed by non-uniform integer
|
|
expressions in shader code.
|
|
If this feature is not enabled, resources with a descriptor type of
|
|
ename:VK_DESCRIPTOR_TYPE_STORAGE_TEXEL_BUFFER must: not be indexed by
|
|
non-uniform integer expressions when aggregated into arrays in shader
|
|
code.
|
|
This also indicates whether shader modules can: declare the
|
|
code:StorageTexelBufferArrayNonUniformIndexingEXT capability.
|
|
* [[features-descriptorBindingUniformBufferUpdateAfterBind]]
|
|
pname:descriptorBindingUniformBufferUpdateAfterBind indicates whether
|
|
the implementation supports updating uniform buffer descriptors after a
|
|
set is bound.
|
|
If this feature is not enabled,
|
|
ename:VK_DESCRIPTOR_BINDING_UPDATE_AFTER_BIND_BIT_EXT must: not be used
|
|
with ename:VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER.
|
|
* [[features-descriptorBindingSampledImageUpdateAfterBind]]
|
|
pname:descriptorBindingSampledImageUpdateAfterBind indicates whether the
|
|
implementation supports updating sampled image descriptors after a set
|
|
is bound.
|
|
If this feature is not enabled,
|
|
ename:VK_DESCRIPTOR_BINDING_UPDATE_AFTER_BIND_BIT_EXT must: not be used
|
|
with ename:VK_DESCRIPTOR_TYPE_SAMPLER,
|
|
ename:VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, or
|
|
ename:VK_DESCRIPTOR_TYPE_SAMPLED_IMAGE.
|
|
* [[features-descriptorBindingStorageImageUpdateAfterBind]]
|
|
pname:descriptorBindingStorageImageUpdateAfterBind indicates whether the
|
|
implementation supports updating storage image descriptors after a set
|
|
is bound.
|
|
If this feature is not enabled,
|
|
ename:VK_DESCRIPTOR_BINDING_UPDATE_AFTER_BIND_BIT_EXT must: not be used
|
|
with ename:VK_DESCRIPTOR_TYPE_STORAGE_IMAGE.
|
|
* [[features-descriptorBindingStorageBufferUpdateAfterBind]]
|
|
pname:descriptorBindingStorageBufferUpdateAfterBind indicates whether
|
|
the implementation supports updating storage buffer descriptors after a
|
|
set is bound.
|
|
If this feature is not enabled,
|
|
ename:VK_DESCRIPTOR_BINDING_UPDATE_AFTER_BIND_BIT_EXT must: not be used
|
|
with ename:VK_DESCRIPTOR_TYPE_STORAGE_BUFFER.
|
|
* [[features-descriptorBindingUniformTexelBufferUpdateAfterBind]]
|
|
pname:descriptorBindingUniformTexelBufferUpdateAfterBind indicates
|
|
whether the implementation supports updating uniform texel buffer
|
|
descriptors after a set is bound.
|
|
If this feature is not enabled,
|
|
ename:VK_DESCRIPTOR_BINDING_UPDATE_AFTER_BIND_BIT_EXT must: not be used
|
|
with ename:VK_DESCRIPTOR_TYPE_UNIFORM_TEXEL_BUFFER.
|
|
* [[features-descriptorBindingStorageTexelBufferUpdateAfterBind]]
|
|
pname:descriptorBindingStorageTexelBufferUpdateAfterBind indicates
|
|
whether the implementation supports updating storage texel buffer
|
|
descriptors after a set is bound.
|
|
If this feature is not enabled,
|
|
ename:VK_DESCRIPTOR_BINDING_UPDATE_AFTER_BIND_BIT_EXT must: not be used
|
|
with ename:VK_DESCRIPTOR_TYPE_STORAGE_TEXEL_BUFFER.
|
|
* [[features-descriptorBindingUpdateUnusedWhilePending]]
|
|
pname:descriptorBindingUpdateUnusedWhilePending indicates whether the
|
|
implementation supports updating descriptors while the set is in use.
|
|
If this feature is not enabled,
|
|
ename:VK_DESCRIPTOR_BINDING_UPDATE_UNUSED_WHILE_PENDING_BIT_EXT must:
|
|
not be used.
|
|
* [[features-descriptorBindingPartiallyBound]]
|
|
pname:descriptorBindingPartiallyBound indicates whether the
|
|
implementation supports statically using a descriptor set binding in
|
|
which some descriptors are not valid.
|
|
If this feature is not enabled,
|
|
ename:VK_DESCRIPTOR_BINDING_PARTIALLY_BOUND_BIT_EXT must: not be used.
|
|
* [[features-descriptorBindingVariableDescriptorCount]]
|
|
pname:descriptorBindingVariableDescriptorCount indicates whether the
|
|
implementation supports descriptor sets with a variable-sized last
|
|
binding.
|
|
If this feature is not enabled,
|
|
ename:VK_DESCRIPTOR_BINDING_VARIABLE_DESCRIPTOR_COUNT_BIT_EXT must: not
|
|
be used.
|
|
* [[features-runtimeDescriptorArray]] pname:runtimeDescriptorArray
|
|
indicates whether the implementation supports the SPIR-V
|
|
code:RuntimeDescriptorArrayEXT capability.
|
|
If this feature is not enabled, descriptors must: not be declared in
|
|
runtime arrays.
|
|
|
|
If the sname:VkPhysicalDeviceDescriptorIndexingFeaturesEXT structure is
|
|
included in the pname:pNext chain of slink:VkPhysicalDeviceFeatures2KHR, it
|
|
is filled with values indicating whether each feature is supported.
|
|
sname:VkPhysicalDeviceDescriptorIndexingFeaturesEXT can: also be used in the
|
|
pname:pNext chain of slink:VkDeviceCreateInfo to enable features.
|
|
|
|
include::../validity/structs/VkPhysicalDeviceDescriptorIndexingFeaturesEXT.txt[]
|
|
--
|
|
|
|
endif::VK_EXT_descriptor_indexing[]
|
|
|
|
ifdef::VK_EXT_vertex_attribute_divisor[]
|
|
|
|
[open,refpage='VkPhysicalDeviceVertexAttributeDivisorFeaturesEXT',desc='Structure describing if fetching of vertex attribute may be repeated for instanced rendering',type='structs']
|
|
--
|
|
The sname:VkPhysicalDeviceVertexAttributeDivisorFeaturesEXT structure is
|
|
defined as:
|
|
|
|
include::../api/structs/VkPhysicalDeviceVertexAttributeDivisorFeaturesEXT.txt[]
|
|
|
|
* pname:sType is the type of this structure.
|
|
* pname:pNext is `NULL` or a pointer to an extension-specific structure.
|
|
* [[features-vertexAttributeInstanceRateDivisor]]
|
|
pname:vertexAttributeInstanceRateDivisor specifies whether vertex
|
|
attribute fetching may be repeated in case of instanced rendering.
|
|
* [[features-vertexAttributeInstanceRateZeroDivisor]]
|
|
pname:vertexAttributeInstanceRateZeroDivisor specifies whether a zero
|
|
value for sname:VkVertexInputBindingDivisorDescriptionEXT::pname:divisor
|
|
is supported.
|
|
|
|
If the sname:VkPhysicalDeviceVertexAttributeDivisorFeaturesEXT structure is
|
|
included in the pname:pNext chain of slink:VkPhysicalDeviceFeatures2, it is
|
|
filled with values indicating the implementation-dependent behavior.
|
|
sname:VkPhysicalDeviceVertexAttributeDivisorFeaturesEXT can: also be used in
|
|
pname:pNext chain of slink:VkDeviceCreateInfo to enable the feature.
|
|
|
|
include::../validity/structs/VkPhysicalDeviceVertexAttributeDivisorFeaturesEXT.txt[]
|
|
--
|
|
|
|
endif::VK_EXT_vertex_attribute_divisor[]
|
|
|
|
ifdef::VK_EXT_astc_decode_mode[]
|
|
|
|
[open,refpage='VkPhysicalDeviceASTCDecodeFeaturesEXT',desc='Structure describing ASTC decode mode features',type='structs']
|
|
--
|
|
The sname:VkPhysicalDeviceASTCDecodeFeaturesEXT structure is defined as:
|
|
|
|
include::../api/structs/VkPhysicalDeviceASTCDecodeFeaturesEXT.txt[]
|
|
|
|
The members of the sname:VkPhysicalDeviceASTCDecodeFeaturesEXT structure
|
|
describe the following features:
|
|
|
|
* [[features-astc-decodeModeSharedExponent]]
|
|
pname:decodeModeSharedExponent indicates whether the implementation
|
|
supports decoding ASTC compressed formats to
|
|
ename:VK_FORMAT_E5B9G9R9_UFLOAT_PACK32 internal precision.
|
|
|
|
If the sname:VkPhysicalDeviceASTCDecodeFeaturesEXT structure is included in
|
|
the pname:pNext chain of flink:vkGetPhysicalDeviceFeatures2KHR, it is filled
|
|
with values indicating whether each feature is supported.
|
|
sname:VkPhysicalDeviceASTCDecodeFeaturesEXT can: also be used in the
|
|
pname:pNext chain of flink:vkCreateDevice to enable features.
|
|
|
|
include::../validity/structs/VkPhysicalDeviceASTCDecodeFeaturesEXT.txt[]
|
|
--
|
|
|
|
endif::VK_EXT_astc_decode_mode[]
|
|
|
|
ifdef::VK_EXT_transform_feedback[]
|
|
|
|
[open,refpage='VkPhysicalDeviceTransformFeedbackFeaturesEXT',desc='Structure describing transform feedback features that can be supported by an implementation',type='structs']
|
|
--
|
|
The sname:VkPhysicalDeviceTransformFeedbackFeaturesEXT structure is defined
|
|
as:
|
|
|
|
include::../api/structs/VkPhysicalDeviceTransformFeedbackFeaturesEXT.txt[]
|
|
|
|
The members of the sname:VkPhysicalDeviceTransformFeedbackFeaturesEXT
|
|
structure describe the following features:
|
|
|
|
* [[features-transformFeedback]] pname:transformFeedback indicates whether
|
|
the implementation supports transform feedback and shader modules can:
|
|
declare the code:TransformFeedback capability.
|
|
|
|
* [[features-geometryStreams]] pname:geometryStreams indicates whether the
|
|
implementation supports the code:GeometryStreams SPIR-V capability.
|
|
|
|
If the sname:VkPhysicalDeviceTransformFeedbackFeaturesEXT structure is
|
|
included in the pname:pNext chain of slink:VkPhysicalDeviceFeatures2KHR, it
|
|
is filled with values indicating whether each feature is supported.
|
|
sname:VkPhysicalDeviceTransformFeedbackFeaturesEXT can: also be used in the
|
|
pname:pNext chain of slink:VkDeviceCreateInfo to enable features.
|
|
|
|
include::../validity/structs/VkPhysicalDeviceTransformFeedbackFeaturesEXT.txt[]
|
|
--
|
|
|
|
endif::VK_EXT_transform_feedback[]
|
|
|
|
ifdef::VK_KHR_vulkan_memory_model[]
|
|
[open,refpage='VkPhysicalDeviceVulkanMemoryModelFeaturesKHR',desc='Structure describing features supported by VK_KHR_vulkan_memory_model',type='structs']
|
|
--
|
|
To query memory model features additionally supported call
|
|
flink:vkGetPhysicalDeviceFeatures2 with a
|
|
sname:VkPhysicalDeviceVulkanMemoryModelFeaturesKHR structure included in the
|
|
pname:pNext chain of its pname:pFeatures parameter.
|
|
The sname:VkPhysicalDeviceVulkanMemoryModelFeaturesKHR structure can: also
|
|
be in the pname:pNext chain of a slink:VkDeviceCreateInfo structure, in
|
|
which case it controls which additional features are enabled in the device.
|
|
|
|
The slink:VkPhysicalDeviceVulkanMemoryModelFeaturesKHR structure is defined
|
|
as:
|
|
|
|
include::../api/structs/VkPhysicalDeviceVulkanMemoryModelFeaturesKHR.txt[]
|
|
|
|
* pname:sType is the type of this structure.
|
|
* pname:pNext is `NULL` or a pointer to an extension-specific structure.
|
|
* [[features-vulkanMemoryModel]] pname:vulkanMemoryModel indicates whether
|
|
the Vulkan Memory Model is supported, as defined in
|
|
<<memory-model,Vulkan Memory Model>>.
|
|
This also indicates whether shader modules can: declare the
|
|
code:VulkanMemoryModelKHR capability.
|
|
* [[features-vulkanMemoryModelDeviceScope]]
|
|
pname:vulkanMemoryModelDeviceScope indicates whether the Vulkan Memory
|
|
Model can use code:Device scope synchronization.
|
|
This also indicates whether shader modules can: declare the
|
|
code:VulkanMemoryModelDeviceScopeKHR capability.
|
|
* [[features-vulkanMemoryModelAvailabilityVisibilityChains]]
|
|
pname:vulkanMemoryModelAvailabilityVisibilityChains indicates whether
|
|
the Vulkan Memory Model can use <<memory-model-availability-visibility,
|
|
availability and visibility chains>> with more than one element.
|
|
|
|
include::../validity/structs/VkPhysicalDeviceVulkanMemoryModelFeaturesKHR.txt[]
|
|
--
|
|
endif::VK_KHR_vulkan_memory_model[]
|
|
|
|
ifdef::VK_EXT_inline_uniform_block[]
|
|
|
|
[open,refpage='VkPhysicalDeviceInlineUniformBlockFeaturesEXT',desc='Structure describing inline uniform block features that can be supported by an implementation',type='structs']
|
|
--
|
|
The sname:VkPhysicalDeviceInlineUniformBlockFeaturesEXT structure is defined
|
|
as:
|
|
|
|
include::../api/structs/VkPhysicalDeviceInlineUniformBlockFeaturesEXT.txt[]
|
|
|
|
The members of the sname:VkPhysicalDeviceInlineUniformBlockFeaturesEXT
|
|
structure describe the following features:
|
|
|
|
* [[features-inlineUniformBlock]] pname:inlineUniformBlock indicates
|
|
whether the implementation supports inline uniform block descriptors.
|
|
If this feature is not enabled,
|
|
ename:VK_DESCRIPTOR_TYPE_INLINE_UNIFORM_BLOCK_EXT must: not be used.
|
|
* [[features-descriptorBindingInlineUniformBlockUpdateAfterBind]]
|
|
pname:descriptorBindingInlineUniformBlockUpdateAfterBind
|
|
ifndef::VK_EXT_descriptor_indexing[]
|
|
is ename:VK_FALSE and reserved for future use.
|
|
endif::VK_EXT_descriptor_indexing[]
|
|
ifdef::VK_EXT_descriptor_indexing[]
|
|
indicates whether the implementation supports updating inline uniform
|
|
block descriptors after a set is bound.
|
|
If this feature is not enabled,
|
|
ename:VK_DESCRIPTOR_BINDING_UPDATE_AFTER_BIND_BIT_EXT must: not be used
|
|
with ename:VK_DESCRIPTOR_TYPE_INLINE_UNIFORM_BLOCK_EXT.
|
|
endif::VK_EXT_descriptor_indexing[]
|
|
|
|
If the sname:VkPhysicalDeviceInlineUniformBlockFeaturesEXT structure is
|
|
included in the pname:pNext chain of slink:VkPhysicalDeviceFeatures2, it is
|
|
filled with values indicating whether each feature is supported.
|
|
sname:VkPhysicalDeviceInlineUniformBlockFeaturesEXT can: also be used in the
|
|
pname:pNext chain of slink:VkDeviceCreateInfo to enable features.
|
|
|
|
include::../validity/structs/VkPhysicalDeviceInlineUniformBlockFeaturesEXT.txt[]
|
|
--
|
|
|
|
endif::VK_EXT_inline_uniform_block[]
|
|
|
|
ifdef::VK_NV_representative_fragment_test[]
|
|
[open,refpage='VkPhysicalDeviceRepresentativeFragmentTestFeaturesNV',desc='Structure describing the representative fragment test features that can be supported by an implementation',type='structs']
|
|
--
|
|
The sname:VkPhysicalDeviceRepresentativeFragmentTestFeaturesNV structure is
|
|
defined as:
|
|
|
|
include::../api/structs/VkPhysicalDeviceRepresentativeFragmentTestFeaturesNV.txt[]
|
|
|
|
The members of the
|
|
sname:VkPhysicalDeviceRepresentativeFragmentTestFeaturesNV structure
|
|
describe the following features:
|
|
|
|
* [[features-representativeFragmentTest]] pname:representativeFragmentTest
|
|
indicates whether the implementation supports the representative
|
|
fragment test.
|
|
See <<fragops-rep-frag-test, Representative Fragment Test>>.
|
|
|
|
If the sname:VkPhysicalDeviceRepresentativeFragmentTestFeaturesNV structure
|
|
is included in the pname:pNext chain of slink:VkPhysicalDeviceFeatures2KHR,
|
|
it is filled with values indicating whether the feature is supported.
|
|
sname:VkPhysicalDeviceRepresentativeFragmentTestFeaturesNV can: also be used
|
|
in the pname:pNext chain of slink:VkDeviceCreateInfo to enable the feature.
|
|
|
|
include::../validity/structs/VkPhysicalDeviceRepresentativeFragmentTestFeaturesNV.txt[]
|
|
--
|
|
endif::VK_NV_representative_fragment_test[]
|
|
|
|
ifdef::VK_NV_scissor_exclusive[]
|
|
|
|
[open,refpage='VkPhysicalDeviceExclusiveScissorFeaturesNV',desc='Structure describing exclusive scissor features that can be supported by an implementation',type='structs']
|
|
--
|
|
The sname:VkPhysicalDeviceExclusiveScissorFeaturesNV structure is defined
|
|
as:
|
|
|
|
include::../api/structs/VkPhysicalDeviceExclusiveScissorFeaturesNV.txt[]
|
|
|
|
The members of the sname:VkPhysicalDeviceExclusiveScissorFeaturesNV
|
|
structure describe the following features:
|
|
|
|
* [[features-exclusiveScissor]] pname:exclusiveScissor indicates that the
|
|
implementation supports the exclusive scissor test.
|
|
|
|
See <<fragops-exclusive-scissor,Exclusive Scissor Test>> for more
|
|
information.
|
|
|
|
If the sname:VkPhysicalDeviceExclusiveScissorFeaturesNV structure is
|
|
included in the pname:pNext chain of slink:VkPhysicalDeviceFeatures2KHR, it
|
|
is filled with values indicating whether the feature is supported.
|
|
sname:VkPhysicalDeviceExclusiveScissorFeaturesNV can: also be used in the
|
|
pname:pNext chain of slink:VkDeviceCreateInfo to enable the feature.
|
|
|
|
include::../validity/structs/VkPhysicalDeviceExclusiveScissorFeaturesNV.txt[]
|
|
--
|
|
endif::VK_NV_scissor_exclusive[]
|
|
|
|
ifdef::VK_NV_corner_sampled_image[]
|
|
|
|
[open,refpage='VkPhysicalDeviceCornerSampledImageFeaturesNV',desc='Structure describing corner sampled image features that can be supported by an implementation',type='structs']
|
|
--
|
|
The sname:VkPhysicalDeviceCornerSampledImageFeaturesNV structure is defined
|
|
as:
|
|
|
|
include::../api/structs/VkPhysicalDeviceCornerSampledImageFeaturesNV.txt[]
|
|
|
|
The members of the sname:VkPhysicalDeviceCornerSampledImageFeaturesNV
|
|
structure describe the following features:
|
|
|
|
* [[features-cornersampledimage]] pname:cornerSampledImage specifies
|
|
whether images can be created with a
|
|
slink:VkImageCreateInfo::pname:flags containing
|
|
ename:VK_IMAGE_CREATE_CORNER_SAMPLED_BIT_NV.
|
|
See <<resources-images-corner-sampled,Corner-Sampled Images>>.
|
|
|
|
If the sname:VkPhysicalDeviceCornerSampledImageFeaturesNV structure is
|
|
included in the pname:pNext chain of slink:VkPhysicalDeviceFeatures2KHR, it
|
|
is filled with values indicating whether each feature is supported.
|
|
sname:VkPhysicalDeviceCornerSampledImageFeaturesNV can: also be used in the
|
|
pname:pNext chain of slink:VkDeviceCreateInfo to enable features.
|
|
|
|
include::../validity/structs/VkPhysicalDeviceCornerSampledImageFeaturesNV.txt[]
|
|
--
|
|
|
|
endif::VK_NV_corner_sampled_image[]
|
|
|
|
ifdef::VK_NV_compute_shader_derivatives[]
|
|
|
|
[open,refpage='VkPhysicalDeviceComputeShaderDerivativesFeaturesNV',desc='Structure describing compute shader derivative features that can be supported by an implementation',type='structs']
|
|
--
|
|
The sname:VkPhysicalDeviceComputeShaderDerivativesFeaturesNV structure is
|
|
defined as:
|
|
|
|
include::../api/structs/VkPhysicalDeviceComputeShaderDerivativesFeaturesNV.txt[]
|
|
|
|
The members of the sname:VkPhysicalDeviceComputeShaderDerivativesFeaturesNV
|
|
structure describe the following features:
|
|
|
|
* [[features-computeShaderDerivativesQuads]]
|
|
pname:computeDerivativeGroupQuads indicates that the implementation
|
|
supports the code:ComputeDerivativeGroupQuadsNV SPIR-V capability.
|
|
* [[features-computeShaderDerivativesLinear]]
|
|
pname:computeDerivativeGroupLinear indicates that the implementation
|
|
supports the code:ComputeDerivativeGroupLinearNV SPIR-V capability.
|
|
|
|
See <<texture-derivatives-compute,Compute Shader Derivatives>> for more
|
|
information.
|
|
|
|
If the sname:VkPhysicalDeviceComputeShaderDerivativesFeaturesNV structure is
|
|
included in the pname:pNext chain of slink:VkPhysicalDeviceFeatures2KHR, it
|
|
is filled with values indicating whether each feature is supported.
|
|
sname:VkPhysicalDeviceComputeShaderDerivativesFeaturesNV can: also be used
|
|
in the pname:pNext chain of slink:VkDeviceCreateInfo to enable features.
|
|
|
|
include::../validity/structs/VkPhysicalDeviceComputeShaderDerivativesFeaturesNV.txt[]
|
|
--
|
|
|
|
endif::VK_NV_compute_shader_derivatives[]
|
|
|
|
ifdef::VK_NV_fragment_shader_barycentric[]
|
|
|
|
[open,refpage='VkPhysicalDeviceFragmentShaderBarycentricFeaturesNV',desc='Structure describing barycentric support in fragment shaders that can be supported by an implementation',type='structs']
|
|
--
|
|
The sname:VkPhysicalDeviceFragmentShaderBarycentricFeaturesNV structure is
|
|
defined as:
|
|
|
|
include::../api/structs/VkPhysicalDeviceFragmentShaderBarycentricFeaturesNV.txt[]
|
|
|
|
The members of the sname:VkPhysicalDeviceFragmentShaderBarycentricFeaturesNV
|
|
structure describe the following features:
|
|
|
|
* [[features-fragmentShaderBarycentric]] pname:fragmentShaderBarycentric
|
|
indicates that the implementation supports the code:BaryCoordNV and
|
|
code:BaryCoordNoPerspNV SPIR-V fragment shader built-ins and supports
|
|
the code:PerVertexNV SPIR-V decoration on fragment shader input
|
|
variables.
|
|
|
|
See <<primsrast-barycentric,Barycentric Interpolation>> for more
|
|
information.
|
|
|
|
If the sname:VkPhysicalDeviceFragmentShaderBarycentricFeaturesNV structure
|
|
is included in the pname:pNext chain of slink:VkPhysicalDeviceFeatures2KHR,
|
|
it is filled with values indicating whether the feature is supported.
|
|
sname:VkPhysicalDeviceFragmentShaderBarycentricFeaturesNV can: also be used
|
|
in the pname:pNext chain of slink:VkDeviceCreateInfo to enable features.
|
|
|
|
include::../validity/structs/VkPhysicalDeviceFragmentShaderBarycentricFeaturesNV.txt[]
|
|
--
|
|
|
|
endif::VK_NV_fragment_shader_barycentric[]
|
|
|
|
ifdef::VK_NV_shader_image_footprint[]
|
|
|
|
[open,refpage='VkPhysicalDeviceShaderImageFootprintFeaturesNV',desc='Structure describing shader image footprint features that can be supported by an implementation',type='structs']
|
|
--
|
|
The sname:VkPhysicalDeviceShaderImageFootprintFeaturesNV structure is
|
|
defined as:
|
|
|
|
include::../api/structs/VkPhysicalDeviceShaderImageFootprintFeaturesNV.txt[]
|
|
|
|
* [[features-imageFootprint]] pname:imageFootprint specifies whether the
|
|
implementation supports the code:ImageFootprintNV SPIR-V capability.
|
|
|
|
See <<textures-footprint,Texel Footprint Evaluation>> for more information.
|
|
|
|
If the sname:VkPhysicalDeviceShaderImageFootprintFeaturesNV structure is
|
|
included in the pname:pNext chain of slink:VkPhysicalDeviceFeatures2KHR, it
|
|
is filled with values indicating whether each feature is supported.
|
|
sname:VkPhysicalDeviceShaderImageFootprintFeaturesNV can: also be used in
|
|
the pname:pNext chain of slink:VkDeviceCreateInfo to enable features.
|
|
|
|
include::../validity/structs/VkPhysicalDeviceShaderImageFootprintFeaturesNV.txt[]
|
|
--
|
|
|
|
endif::VK_NV_shader_image_footprint[]
|
|
|
|
|
|
ifdef::VK_NV_shading_rate_image[]
|
|
|
|
[open,refpage='VkPhysicalDeviceShadingRateImageFeaturesNV',desc='Structure describing shading rate image features that can be supported by an implementation',type='structs']
|
|
--
|
|
The sname:VkPhysicalDeviceShadingRateImageFeaturesNV structure is defined
|
|
as:
|
|
|
|
include::../api/structs/VkPhysicalDeviceShadingRateImageFeaturesNV.txt[]
|
|
|
|
The members of the sname:VkPhysicalDeviceShadingRateImageFeaturesNV
|
|
structure describe the following features:
|
|
|
|
* [[features-shadingRateImage]] pname:shadingRateImage indicates that the
|
|
implementation supports the use of a shading rate image to derive an
|
|
effective shading rate for fragment processing.
|
|
It also indicates that the implementation supports the
|
|
code:ShadingRateNV SPIR-V execution mode.
|
|
* [[features-shadingRateCoarseSampleOrder]]
|
|
pname:shadingRateCoarseSampleOrder indicates that the implementation
|
|
supports a user-configurable ordering of coverage samples in fragments
|
|
larger than one pixel.
|
|
|
|
See <<primsrast-shading-rate-image, Shading Rate Image>> for more
|
|
information.
|
|
|
|
If the sname:VkPhysicalDeviceShadingRateImageFeaturesNV structure is
|
|
included in the pname:pNext chain of slink:VkPhysicalDeviceFeatures2KHR, it
|
|
is filled with values indicating whether the feature is supported.
|
|
sname:VkPhysicalDeviceShadingRateImageFeaturesNV can: also be used in the
|
|
pname:pNext chain of slink:VkDeviceCreateInfo to enable features.
|
|
|
|
include::../validity/structs/VkPhysicalDeviceShadingRateImageFeaturesNV.txt[]
|
|
--
|
|
|
|
endif::VK_NV_shading_rate_image[]
|
|
|
|
ifdef::VK_EXT_fragment_density_map[]
|
|
|
|
[open,refpage='VkPhysicalDeviceFragmentDensityMapFeaturesEXT',desc='Structure describing fragment density map features that can be supported by an implementation',type='structs']
|
|
--
|
|
The sname:VkPhysicalDeviceFragmentDensityMapFeaturesEXT structure is defined
|
|
as:
|
|
|
|
include::../api/structs/VkPhysicalDeviceFragmentDensityMapFeaturesEXT.txt[]
|
|
|
|
The members of the sname:VkPhysicalDeviceFragmentDensityMapFeaturesEXT
|
|
structure describe the following features:
|
|
|
|
* [[features-fragmentdensitymap]] pname:fragmentDensityMap specifies
|
|
whether the implementation supports render passes with a fragment
|
|
density map attachment.
|
|
If this feature is not enabled and the pname:pNext chain of
|
|
sname:VkRenderPassCreateInfo contains
|
|
sname:VkRenderPassFragmentDensityMapCreateInfoEXT,
|
|
pname:fragmentDensityMapAttachment must: be ename:VK_ATTACHMENT_UNUSED.
|
|
* [[features-fragmentdensitymapdynamic]] pname:fragmentDensityMapDynamic
|
|
specifies whether the implementation supports dynamic fragment density
|
|
map image views.
|
|
If this feature is not enabled,
|
|
ename:VK_IMAGE_VIEW_CREATE_FRAGMENT_DENSITY_MAP_DYNAMIC_BIT_EXT must:
|
|
not be included in sname:VkImageViewCreateInfo::pname:flags.
|
|
* [[features-nonsubsampledimages]]
|
|
pname:fragmentDensityMapNonSubsampledImages specifies whether the
|
|
implementation supports regular non-subsampled image attachments with
|
|
fragment density map render passes.
|
|
If this feature is not enabled, render passes with a
|
|
<<renderpass-fragmentdensitymapattachment,fragment density map
|
|
attachment>> must: only have <<resources-subsampledimages,subsampled
|
|
attachments>> bound.
|
|
|
|
If the sname:VkPhysicalDeviceFragmentDensityMapFeaturesEXT structure is
|
|
included in the pname:pNext chain of slink:VkPhysicalDeviceFeatures2, it is
|
|
filled with values indicating whether each feature is supported.
|
|
sname:VkPhysicalDeviceFragmentDensityMapFeaturesEXT can: also be used in
|
|
pname:pNext chain of slink:VkDeviceCreateInfo to enable the features.
|
|
|
|
include::../validity/structs/VkPhysicalDeviceFragmentDensityMapFeaturesEXT.txt[]
|
|
--
|
|
|
|
endif::VK_EXT_fragment_density_map[]
|
|
|
|
ifdef::VK_EXT_scalar_block_layout[]
|
|
|
|
[open,refpage='VkPhysicalDeviceScalarBlockLayoutFeaturesEXT',desc='Structure indicating support for scalar block layouts',type='structs']
|
|
--
|
|
The sname:VkPhysicalDeviceScalarBlockLayoutFeaturesEXT structure is defined
|
|
as:
|
|
|
|
include::../api/structs/VkPhysicalDeviceScalarBlockLayoutFeaturesEXT.txt[]
|
|
|
|
The members of the sname:VkPhysicalDeviceScalarBlockLayoutFeaturesEXT
|
|
structure describe the following features:
|
|
|
|
* [[features-scalarBlockLayout]] pname:scalarBlockLayout indicates that
|
|
the implementation supports the layout of resource blocks in shaders
|
|
using <<interfaces-scalar-block-layout, scalar alignment>>.
|
|
|
|
If the sname:VkPhysicalDeviceScalarBlockLayoutFeaturesEXT structure is
|
|
included in the pname:pNext chain of slink:VkPhysicalDeviceFeatures2KHR, it
|
|
is filled with values indicating whether the feature is supported.
|
|
sname:VkPhysicalDeviceScalarBlockLayoutFeaturesEXT can: also be used in the
|
|
pname:pNext chain of slink:VkDeviceCreateInfo to enable this feature.
|
|
|
|
include::../validity/structs/VkPhysicalDeviceScalarBlockLayoutFeaturesEXT.txt[]
|
|
--
|
|
|
|
endif::VK_EXT_scalar_block_layout[]
|
|
|
|
ifdef::VK_EXT_depth_clip_enable[]
|
|
|
|
[open,refpage='VkPhysicalDeviceDepthClipEnableFeaturesEXT',desc='Structure indicating support for explicit enable of depth clip',type='structs']
|
|
--
|
|
The sname:VkPhysicalDeviceDepthClipEnableFeaturesEXT structure is defined
|
|
as:
|
|
|
|
include::../api/structs/VkPhysicalDeviceDepthClipEnableFeaturesEXT.txt[]
|
|
|
|
The members of the sname:VkPhysicalDeviceDepthClipEnableFeaturesEXT
|
|
structure describe the following features:
|
|
|
|
* [[features-depthClipEnable]] pname:depthClipEnable indicates that the
|
|
implementation supports setting the depth clipping operation explicitly
|
|
via the slink:VkPipelineRasterizationDepthClipStateCreateInfoEXT
|
|
pipeline state.
|
|
Otherwise depth clipping is only enabled when
|
|
sname:VkPipelineRasterizationStateCreateInfo::pname:depthClampEnable is
|
|
set to ename:VK_FALSE.
|
|
|
|
If the sname:VkPhysicalDeviceDepthClipEnableFeaturesEXT structure is
|
|
included in the pname:pNext chain of slink:VkPhysicalDeviceFeatures2KHR, it
|
|
is filled with values indicating whether the feature is supported.
|
|
sname:VkPhysicalDeviceDepthClipEnableFeaturesEXT can: also be used in the
|
|
pname:pNext chain of slink:VkDeviceCreateInfo to enable this feature.
|
|
|
|
include::../validity/structs/VkPhysicalDeviceDepthClipEnableFeaturesEXT.txt[]
|
|
--
|
|
|
|
endif::VK_EXT_depth_clip_enable[]
|
|
|
|
ifdef::VK_EXT_memory_priority[]
|
|
|
|
[open,refpage='VkPhysicalDeviceMemoryPriorityFeaturesEXT',desc='Structure describing memory priority features that can be supported by an implementation',type='structs']
|
|
--
|
|
The sname:VkPhysicalDeviceMemoryPriorityFeaturesEXT structure is defined as:
|
|
|
|
include::../api/structs/VkPhysicalDeviceMemoryPriorityFeaturesEXT.txt[]
|
|
|
|
The members of the sname:VkPhysicalDeviceMemoryPriorityFeaturesEXT structure
|
|
describe the following features:
|
|
|
|
* [[features-memoryPriority]] pname:memoryPriority indicates that the
|
|
implementation supports memory priorities specified at memory allocation
|
|
time via slink:VkMemoryPriorityAllocateInfoEXT.
|
|
|
|
If the sname:VkPhysicalDeviceMemoryPriorityFeaturesEXT structure is included
|
|
in the pname:pNext chain of slink:VkPhysicalDeviceFeatures2KHR, it is filled
|
|
with values indicating whether the feature is supported.
|
|
sname:VkPhysicalDeviceMemoryPriorityFeaturesEXT can: also be used in the
|
|
pname:pNext chain of slink:VkDeviceCreateInfo to enable features.
|
|
|
|
include::../validity/structs/VkPhysicalDeviceMemoryPriorityFeaturesEXT.txt[]
|
|
--
|
|
|
|
endif::VK_EXT_memory_priority[]
|
|
|
|
ifdef::VK_EXT_buffer_device_address[]
|
|
|
|
[open,refpage='VkPhysicalDeviceBufferDeviceAddressFeaturesEXT',desc='Structure describing buffer address features that can be supported by an implementation',type='structs']
|
|
--
|
|
The sname:VkPhysicalDeviceBufferDeviceAddressFeaturesEXT structure is
|
|
defined as:
|
|
|
|
include::../api/structs/VkPhysicalDeviceBufferDeviceAddressFeaturesEXT.txt[]
|
|
|
|
The members of the sname:VkPhysicalDeviceBufferDeviceAddressFeaturesEXT
|
|
structure describe the following features:
|
|
|
|
* [[features-bufferDeviceAddress]] pname:bufferDeviceAddress indicates
|
|
that the implementation supports accessing buffer memory in shaders as
|
|
storage buffers via an address queried from
|
|
flink:vkGetBufferDeviceAddressEXT.
|
|
* [[features-bufferDeviceAddressCaptureReplay]]
|
|
pname:bufferDeviceAddressCaptureReplay indicates that the implementation
|
|
supports saving and reusing buffer addresses, e.g. for trace capture and
|
|
replay.
|
|
* [[features-bufferDeviceAddressMultiDevice]]
|
|
pname:bufferDeviceAddressMultiDevice indicates that the implementation
|
|
supports the pname:bufferDeviceAddress feature for logical devices
|
|
created with multiple physical devices.
|
|
If this feature is not supported, buffer addresses must: not be queried
|
|
on a logical device created with more than one physical device.
|
|
|
|
[NOTE]
|
|
.Note
|
|
====
|
|
pname:bufferDeviceAddressMultiDevice exists to allow certain legacy
|
|
platforms to be able to support pname:bufferDeviceAddress without needing to
|
|
support shared GPU virtual addresses for multi-device configurations.
|
|
====
|
|
|
|
See flink:vkGetBufferDeviceAddressEXT for more information.
|
|
|
|
If the sname:VkPhysicalDeviceBufferDeviceAddressFeaturesEXT structure is
|
|
included in the pname:pNext chain of slink:VkPhysicalDeviceFeatures2KHR, it
|
|
is filled with values indicating whether the feature is supported.
|
|
sname:VkPhysicalDeviceBufferDeviceAddressFeaturesEXT can: also be used in
|
|
the pname:pNext chain of slink:VkDeviceCreateInfo to enable features.
|
|
|
|
include::../validity/structs/VkPhysicalDeviceBufferDeviceAddressFeaturesEXT.txt[]
|
|
--
|
|
|
|
endif::VK_EXT_buffer_device_address[]
|
|
|
|
ifdef::VK_NV_dedicated_allocation_image_aliasing[]
|
|
|
|
[open,refpage='VkPhysicalDeviceDedicatedAllocationImageAliasingFeaturesNV',desc='Structure describing dedicated allocation image aliasing features that can be supported by an implementation',type='structs']
|
|
--
|
|
The sname:VkPhysicalDeviceDedicatedAllocationImageAliasingFeaturesNV
|
|
structure is defined as:
|
|
|
|
include::../api/structs/VkPhysicalDeviceDedicatedAllocationImageAliasingFeaturesNV.txt[]
|
|
|
|
The members of the
|
|
sname:VkPhysicalDeviceDedicatedAllocationImageAliasingFeaturesNV structure
|
|
describe the following features:
|
|
|
|
* [[features-dedicatedAllocationImageAliasing]]
|
|
pname:dedicatedAllocationImageAliasing indicates that the implementation
|
|
supports aliasing of compatible image objects on a dedicated allocation.
|
|
|
|
If the sname:VkPhysicalDeviceDedicatedAllocationImageAliasingFeaturesNV
|
|
structure is included in the pname:pNext chain of
|
|
slink:VkPhysicalDeviceFeatures2KHR, it is filled with values indicating
|
|
whether each feature is supported.
|
|
sname:VkPhysicalDeviceDedicatedAllocationImageAliasingFeaturesNV can: also
|
|
be used in the pname:pNext chain of slink:VkDeviceCreateInfo to enable
|
|
features.
|
|
|
|
include::../validity/structs/VkPhysicalDeviceDedicatedAllocationImageAliasingFeaturesNV.txt[]
|
|
--
|
|
|
|
endif::VK_NV_dedicated_allocation_image_aliasing[]
|
|
|
|
ifdef::VK_NV_cooperative_matrix[]
|
|
|
|
[open,refpage='VkPhysicalDeviceCooperativeMatrixFeaturesNV',desc='Structure describing cooperative matrix features that can be supported by an implementation',type='structs']
|
|
--
|
|
The sname:VkPhysicalDeviceCooperativeMatrixFeaturesNV structure is defined
|
|
as:
|
|
|
|
include::../api/structs/VkPhysicalDeviceCooperativeMatrixFeaturesNV.txt[]
|
|
|
|
The members of the sname:VkPhysicalDeviceCooperativeMatrixFeaturesNV
|
|
structure describe the following features:
|
|
|
|
* [[features-cooperativeMatrix]] pname:cooperativeMatrix indicates that
|
|
the implementation supports the code:CooperativeMatrixNV SPIR-V
|
|
capability.
|
|
* [[features-cooperativeMatrixRobustBufferAccess]]
|
|
pname:cooperativeMatrixRobustBufferAccess indicates that the
|
|
implementation supports robust buffer access for SPIR-V
|
|
code:OpCooperativeMatrixLoadNV and code:OpCooperativeMatrixStoreNV
|
|
instructions.
|
|
|
|
If the sname:VkPhysicalDeviceCooperativeMatrixFeaturesNV structure is
|
|
included in the pname:pNext chain of slink:VkPhysicalDeviceFeatures2KHR, it
|
|
is filled with values indicating whether the feature is supported.
|
|
sname:VkPhysicalDeviceCooperativeMatrixFeaturesNV can: also be used in the
|
|
pname:pNext chain of slink:VkDeviceCreateInfo to enable features.
|
|
|
|
include::../validity/structs/VkPhysicalDeviceCooperativeMatrixFeaturesNV.txt[]
|
|
--
|
|
|
|
endif::VK_NV_cooperative_matrix[]
|
|
|
|
ifdef::VK_EXT_ycbcr_image_arrays[]
|
|
|
|
[open,refpage='VkPhysicalDeviceYcbcrImageArraysFeaturesEXT',desc='Structure describing extended Y'C~B~C~R~ image creation features that can be supported by an implementation',type='structs']
|
|
--
|
|
The sname:VkPhysicalDeviceYcbcrImageArraysFeaturesEXT structure is defined
|
|
as:
|
|
|
|
include::../api/structs/VkPhysicalDeviceYcbcrImageArraysFeaturesEXT.txt[]
|
|
|
|
The members of the sname:VkPhysicalDeviceYcbcrImageArraysFeaturesEXT
|
|
structure describe the following features:
|
|
|
|
* [[features-ycbcrImageArrays]] pname:ycbcrImageArrays indicates that the
|
|
implementation supports creating images with a format that requires
|
|
<<formats-requiring-sampler-ycbcr-conversion, Y'C~B~C~R~ conversion>>
|
|
and has multiple array layers.
|
|
|
|
If the sname:VkPhysicalDeviceYcbcrImageArraysFeaturesEXT structure is
|
|
included in the pname:pNext chain of slink:VkPhysicalDeviceFeatures2KHR, it
|
|
is filled with values indicating whether the feature is supported.
|
|
sname:VkPhysicalDeviceYcbcrImageArraysFeaturesEXT can: also be used in the
|
|
pname:pNext chain of slink:VkDeviceCreateInfo to enable features.
|
|
|
|
include::../validity/structs/VkPhysicalDeviceYcbcrImageArraysFeaturesEXT.txt[]
|
|
--
|
|
|
|
endif::VK_EXT_ycbcr_image_arrays[]
|
|
|
|
ifdef::VK_EXT_host_query_reset[]
|
|
|
|
[open,refpage='VkPhysicalDeviceHostQueryResetFeaturesEXT',desc='Structure describing whether queries can be reset from the host',type='structs']
|
|
--
|
|
The sname:VkPhysicalDeviceHostQueryResetFeaturesEXT structure is defined as:
|
|
|
|
include::../api/structs/VkPhysicalDeviceHostQueryResetFeaturesEXT.txt[]
|
|
|
|
The members of the sname:VkPhysicalDeviceHostQueryResetFeaturesEXT structure
|
|
describe the following features:
|
|
|
|
* [[features-hostQueryReset]] pname:hostQueryReset indicates that the
|
|
implementation supports resetting queries from the host with
|
|
flink:vkResetQueryPoolEXT.
|
|
|
|
If the sname:VkPhysicalDeviceHostQueryResetFeaturesEXT structure is included
|
|
in the pname:pNext chain of slink:VkPhysicalDeviceFeatures2, it is filled
|
|
with values indicating whether the feature is supported.
|
|
sname:VkPhysicalDeviceHostQueryResetFeaturesEXT can: also be used in the
|
|
pname:pNext chain of slink:VkDeviceCreateInfo to enable features.
|
|
|
|
include::../validity/structs/VkPhysicalDeviceHostQueryResetFeaturesEXT.txt[]
|
|
--
|
|
|
|
endif::VK_EXT_host_query_reset[]
|
|
|
|
|
|
[[features-requirements]]
|
|
== Feature Requirements
|
|
|
|
All Vulkan graphics implementations must: support the following features:
|
|
|
|
* <<features-robustBufferAccess, pname:robustBufferAccess>>
|
|
ifdef::VK_VERSION_1_1[]
|
|
* <<features-multiview, pname:multiview>>
|
|
endif::VK_VERSION_1_1[]
|
|
ifdef::VK_VERSION_1_1,VK_KHR_variable_pointers[]
|
|
* <<features-variablePointersStorageBuffer,
|
|
pname:variablePointersStorageBuffer>>, if the
|
|
`<<VK_KHR_variable_pointers>>` extension is supported.
|
|
endif::VK_VERSION_1_1,VK_KHR_variable_pointers[]
|
|
ifdef::VK_KHR_8bit_storage[]
|
|
* <<features-StorageBuffer8BitAccess, pname:storageBuffer8BitAccess>>, if
|
|
the `<<VK_KHR_8bit_storage>>` extension is supported.
|
|
endif::VK_KHR_8bit_storage[]
|
|
ifdef::VK_EXT_descriptor_indexing[]
|
|
* If the `<<VK_EXT_descriptor_indexing>>` extension is supported:
|
|
** <<features-shaderSampledImageArrayDynamicIndexing,
|
|
pname:shaderSampledImageArrayDynamicIndexing>>
|
|
** <<features-shaderStorageBufferArrayDynamicIndexing,
|
|
pname:shaderStorageBufferArrayDynamicIndexing>>
|
|
** <<features-shaderUniformTexelBufferArrayDynamicIndexing,
|
|
pname:shaderUniformTexelBufferArrayDynamicIndexing>>
|
|
** <<features-shaderStorageTexelBufferArrayDynamicIndexing,
|
|
pname:shaderStorageTexelBufferArrayDynamicIndexing>>
|
|
** <<features-shaderSampledImageArrayNonUniformIndexing,
|
|
pname:shaderSampledImageArrayNonUniformIndexing>>
|
|
** <<features-shaderStorageBufferArrayNonUniformIndexing,
|
|
pname:shaderStorageBufferArrayNonUniformIndexing>>
|
|
** <<features-shaderUniformTexelBufferArrayNonUniformIndexing,
|
|
pname:shaderUniformTexelBufferArrayNonUniformIndexing>>
|
|
** <<features-descriptorBindingSampledImageUpdateAfterBind,
|
|
pname:descriptorBindingSampledImageUpdateAfterBind>>
|
|
** <<features-descriptorBindingStorageImageUpdateAfterBind,
|
|
pname:descriptorBindingStorageImageUpdateAfterBind>>
|
|
** <<features-descriptorBindingStorageBufferUpdateAfterBind,
|
|
pname:descriptorBindingStorageBufferUpdateAfterBind>> (see also
|
|
<<limits-robustBufferAccessUpdateAfterBind,
|
|
pname:robustBufferAccessUpdateAfterBind>>)
|
|
** <<features-descriptorBindingUniformTexelBufferUpdateAfterBind,
|
|
pname:descriptorBindingUniformTexelBufferUpdateAfterBind>> (see also
|
|
<<limits-robustBufferAccessUpdateAfterBind,
|
|
pname:robustBufferAccessUpdateAfterBind>>)
|
|
** <<features-descriptorBindingStorageTexelBufferUpdateAfterBind,
|
|
pname:descriptorBindingStorageTexelBufferUpdateAfterBind>> (see also
|
|
<<limits-robustBufferAccessUpdateAfterBind,
|
|
pname:robustBufferAccessUpdateAfterBind>>)
|
|
** <<features-descriptorBindingUpdateUnusedWhilePending,
|
|
pname:descriptorBindingUpdateUnusedWhilePending>>
|
|
** <<features-descriptorBindingPartiallyBound,
|
|
pname:descriptorBindingPartiallyBound>>
|
|
** <<features-runtimeDescriptorArray, pname:runtimeDescriptorArray>>
|
|
endif::VK_EXT_descriptor_indexing[]
|
|
ifdef::VK_EXT_inline_uniform_block[]
|
|
* <<features-inlineUniformBlock,pname:inlineUniformBlock>>, if the
|
|
`<<VK_EXT_inline_uniform_block>>` extension is supported.
|
|
ifdef::VK_EXT_descriptor_indexing[]
|
|
* <<features-descriptorBindingInlineUniformBlockUpdateAfterBind,
|
|
pname:descriptorBindingInlineUniformBlockUpdateAfterBind>>, if the
|
|
`<<VK_EXT_inline_uniform_block>>` and `<<VK_EXT_descriptor_indexing>>`
|
|
extensions are both supported.
|
|
endif::VK_EXT_descriptor_indexing[]
|
|
endif::VK_EXT_inline_uniform_block[]
|
|
ifdef::VK_EXT_scalar_block_layout[]
|
|
* <<features-scalarBlockLayout,pname:scalarBlockLayout>>, if the
|
|
`<<VK_EXT_scalar_block_layout>>` extension is supported.
|
|
endif::VK_EXT_scalar_block_layout[]
|
|
|
|
All other features defined in the Specification are optional:.
|