Vulkan-Docs/doc/specs/vulkan/chapters/extensions.txt

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// Copyright (c) 2015-2016 The Khronos Group Inc.
// Copyright notice at https://www.khronos.org/registry/speccopyright.html
[[extended-functionality]]
= Extended Functionality
Additional functionality may: be provided by layers or extensions. A layer
Change log for April 29, 2016 Vulkan 1.0.12 spec update: * Bump API patch number and header version number to 12 for this update. Github Issues: * Change valid usage statements intended to be "sub-points" to be actual sub-points (public issue 66). * Replace double negation in description of slink:VkRenderPassBeginInfo::pname:pClearValues (based on public merge 142). * Cleanup minor typos in spec, ref pages and XML, including those proposed in public pull requests 144, 150, 151, 167, 168, 181, and 186. * Use *strict subset* in describing the partial order of memory property types for slink:VkMemoryType, and update the style guide accordingly (public issue 190). * Fix various "a image" -> "an image" typos (public issue 191). * Note in the <<fundamentals-validusage,Valid Usage>> and <<extensions-interactions,Extension Interactions>> sections that structures defined by extensions which may be passed in structure chains using the ptext:pNext member must: include initial ptext:sType and ptext:pNext members (public issue 192). Internal Issues: * Remove duplicate language from the description of the pname:fence parameter to flink:vkQueueSubmit and improve validity language (internal issue 91). * Added documentation for "optional" attribute to XML readme.tex/pdf (internal issue 149). * Clarify the host-side data validity rules and behavior of flink:vkFlushMappedMemoryRanges and flink:vkInvalidateMappedMemoryRanges (internal issue 266). Other Commits: * Added clarification to flink:vkCmdFillBuffer regarding the use of ename:VK_WHOLE_SIZE. * Fixed and documented implementation of "validextensionstructs" attribute. in XML processing scripts and readme.tex/pdf. * Add missing validity statements to flink:vkResetEvent and flink:vkCmdResetEvent. * Fix validity for the ename:VK_FORMAT_FEATURE_SAMPLED_IMAGE_FILTER_LINEAR_BIT flag. Correct all the draw/dispatch commands to mention optimally tiled images as well as linear tiled images, and say image VIEWS instead of images. Add validity statement to flink:vkCmdBlitImage * Replace the {apiname} macro with hardcoded "Vulkan", now that we've committed to that name. * Add the VK_AMD_rasterization_order extension to vk.xml.
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cannot: add or modify Vulkan commands, while an extension may: do so.
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There are two kinds of layers and extensions, instance and device. Instance
layers and extensions are general purpose and do not depend on a specific
device. Device layers and extensions operate on specific devices, and
require a valid sname:VkDevice to be used. Instance extensions usually
affect the operation of the API as a whole, whereas device layers and
extensions tend to be hardware-specific. Examples of these might be:
* Whole API validation is an example of a good instance layer.
* Debug capabilities might make a good instance extension.
* A layer that provides hardware-specific performance telemetry and
analysis could be a device layer.
* Functions to allow an application to use additional hardware features
beyond the core would be a good candidate for a device extension.
[[extended-functionality-layers]]
== Layers
Change log for April 29, 2016 Vulkan 1.0.12 spec update: * Bump API patch number and header version number to 12 for this update. Github Issues: * Change valid usage statements intended to be "sub-points" to be actual sub-points (public issue 66). * Replace double negation in description of slink:VkRenderPassBeginInfo::pname:pClearValues (based on public merge 142). * Cleanup minor typos in spec, ref pages and XML, including those proposed in public pull requests 144, 150, 151, 167, 168, 181, and 186. * Use *strict subset* in describing the partial order of memory property types for slink:VkMemoryType, and update the style guide accordingly (public issue 190). * Fix various "a image" -> "an image" typos (public issue 191). * Note in the <<fundamentals-validusage,Valid Usage>> and <<extensions-interactions,Extension Interactions>> sections that structures defined by extensions which may be passed in structure chains using the ptext:pNext member must: include initial ptext:sType and ptext:pNext members (public issue 192). Internal Issues: * Remove duplicate language from the description of the pname:fence parameter to flink:vkQueueSubmit and improve validity language (internal issue 91). * Added documentation for "optional" attribute to XML readme.tex/pdf (internal issue 149). * Clarify the host-side data validity rules and behavior of flink:vkFlushMappedMemoryRanges and flink:vkInvalidateMappedMemoryRanges (internal issue 266). Other Commits: * Added clarification to flink:vkCmdFillBuffer regarding the use of ename:VK_WHOLE_SIZE. * Fixed and documented implementation of "validextensionstructs" attribute. in XML processing scripts and readme.tex/pdf. * Add missing validity statements to flink:vkResetEvent and flink:vkCmdResetEvent. * Fix validity for the ename:VK_FORMAT_FEATURE_SAMPLED_IMAGE_FILTER_LINEAR_BIT flag. Correct all the draw/dispatch commands to mention optimally tiled images as well as linear tiled images, and say image VIEWS instead of images. Add validity statement to flink:vkCmdBlitImage * Replace the {apiname} macro with hardcoded "Vulkan", now that we've committed to that name. * Add the VK_AMD_rasterization_order extension to vk.xml.
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When a layer is enabled, it inserts itself into the call chain for Vulkan
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commands the layer is interested in. A common use of layers is to validate
application behavior during development. For example, the implementation
Change log for April 29, 2016 Vulkan 1.0.12 spec update: * Bump API patch number and header version number to 12 for this update. Github Issues: * Change valid usage statements intended to be "sub-points" to be actual sub-points (public issue 66). * Replace double negation in description of slink:VkRenderPassBeginInfo::pname:pClearValues (based on public merge 142). * Cleanup minor typos in spec, ref pages and XML, including those proposed in public pull requests 144, 150, 151, 167, 168, 181, and 186. * Use *strict subset* in describing the partial order of memory property types for slink:VkMemoryType, and update the style guide accordingly (public issue 190). * Fix various "a image" -> "an image" typos (public issue 191). * Note in the <<fundamentals-validusage,Valid Usage>> and <<extensions-interactions,Extension Interactions>> sections that structures defined by extensions which may be passed in structure chains using the ptext:pNext member must: include initial ptext:sType and ptext:pNext members (public issue 192). Internal Issues: * Remove duplicate language from the description of the pname:fence parameter to flink:vkQueueSubmit and improve validity language (internal issue 91). * Added documentation for "optional" attribute to XML readme.tex/pdf (internal issue 149). * Clarify the host-side data validity rules and behavior of flink:vkFlushMappedMemoryRanges and flink:vkInvalidateMappedMemoryRanges (internal issue 266). Other Commits: * Added clarification to flink:vkCmdFillBuffer regarding the use of ename:VK_WHOLE_SIZE. * Fixed and documented implementation of "validextensionstructs" attribute. in XML processing scripts and readme.tex/pdf. * Add missing validity statements to flink:vkResetEvent and flink:vkCmdResetEvent. * Fix validity for the ename:VK_FORMAT_FEATURE_SAMPLED_IMAGE_FILTER_LINEAR_BIT flag. Correct all the draw/dispatch commands to mention optimally tiled images as well as linear tiled images, and say image VIEWS instead of images. Add validity statement to flink:vkCmdBlitImage * Replace the {apiname} macro with hardcoded "Vulkan", now that we've committed to that name. * Add the VK_AMD_rasterization_order extension to vk.xml.
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will not check that Vulkan enums used by the application fall within
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allowed ranges. Instead, a validation layer would do those checks and flag
issues. This avoids a performance penalty during production use of the
application because those layers would not be enabled in production.
To query the available instance layers, call:
include::../protos/vkEnumerateInstanceLayerProperties.txt[]
Change log for February 25, 2015 Vulkan 1.0.4 spec update: * Bump API patch number from 3 to 4 for the first public update to the spec. Add patch number to the spec title (this will be done automatically from XML, later). * Fixes for numerous editorial issues. Regularize descriptions of variable-length array queries. Properly tag enumerants so they come out in the right font (many were mislabeled in usage tags in vk.xml, or not tagged). Spelling and markup corrections (public issue 4). * Fix typos and clearly separate description of different types of memory areas (public issue 5). * Use standards-compliant preprocessor guard symbols on headers (public issue 7). * Note that Github users can't currently set labels on issues, and recommend a fallback approach (public issue 15). * Use latexmath prefix on len= attributes (public issue 29). * Make flink:vkCmdUpdateBuffer pname:dataSize limit consistent (public issue 65). * Add VK_KHR_mirror_clamp_to_edge extension to core API branch, as an optional feature not introducing new commands or enums (internal issue 104). * Cleanup invariance language inherited from the GL specification to not refer to nonexistent (GL-specific) state (internal issue 111). * Modify the flink:vkCmdDrawIndexed pname:vertexOffset definition to not be the "base offset within the index buffer" but rather the "value added to the vertex index before indexing into the vertex buffer" (internal issue 118). * Fix drawing chapter in the "Programmable Primitive Shading" section where it described categories of drawing commands. It referenced flink:vkCmdDrawIndexed twice. Replace the second reference with flink:vkCmdDrawIndexedIndirect (internal issue 119). * Typo fixed in <<sparsememory-examples-advanced,Advanced Sparse Resources>> sparse memory example (internal issue 122). * Add flink:VkDisplayPlaneAlphaFlagsKHR to <require> section of VK_KHR_display extension (internal issue 125) * Add missing optional="false,true" to flink:vkGetImageSparseMemoryRequirements pname:pSparseMemoryRequirementCount parameter (internal issue 132) * Rename ename:VK_STRUCTURE_TYPE_DEBUG_REPORT_CREATE_INFO_EXT to ename:VK_STRUCTURE_TYPE_DEBUG_REPORT_CALLBACK_CREATE_INFO_EXT (internal issue 133) * Fix a handful of broken cross-references in the <<samplers,Samplers>> chapter (internal issue 134). * Fix "Input Attachement" GLSL example to use correct syntax (internal issue 135). * Update XML schema and documentation to accomodate recently added attributes for validity. Add some introductory material describing design choices and pointing to the public repository to file issues. * Put include of validity in the core spec extensions chapter on its own line, so that asciidoc is happy. * Fix vertexOffset language to specify that it's the value added to the vertex index before indexing into the vertex buffer, not the base offset within the index buffer. * Fix error in the description of flink:vkCmdNextSubpass.
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* pname:pPropertyCount is a pointer to an integer related to the number of
layer properties available or queried, as described below.
* pname:pProperties is either `NULL` or a pointer to an array of
slink:VkLayerProperties structures.
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include::../validity/protos/vkEnumerateInstanceLayerProperties.txt[]
To enable a instance layer, the name of the layer should be added to the
pname:ppEnabledLayerNames member of slink:VkInstanceCreateInfo when creating
Change log for April 22, 2016 Vulkan 1.0.11 spec update: * Bump API patch number and header version number to 11 for this update. Github Issues: * Clarify the WSI extension language by switching from the fuzzier "ownership" language to more-consistent "acquire" language (public issue 117). * Clarify that memory barriers apply to all commands in the dependency chains in the flink:vkGetRenderAreaGranularity command and the <<synchronization-execution-and-memory-dependencies,Execution And Memory Dependencies>> section (public issue 132). * Clarify that a queue family is a set of queues in the <<fundamentals-execmodel,Execution Model>> section (public issue 166). * Removed requirement from valid usage language that VkPresentInfoKHR::waitSemaphoreCount must be greater than 0 (public issue 171). * Fix broken internal links, describe structures consistently, use consistent style for SPIR-V codewords, and tag normative terms that were missing asciidoc tags (public issue 183 and ancillary markup/normative language fixes). * Fix typos for slink:VkPhysicalDeviceLimits member names in slink:VkImageCreateInfo validity language (public issue 184). Internal Issues: * Document that the requested patch version number specified as part of slink:VkApplicationInfo::pname:apiVersion is ignored when creating an instance (internal issue 176). * Clarify handling of extension structs in the <<fundamentals-validusageValid Usage>> section (internal issue 254). * Update required slink:VkImageFormatProperties::pname:maxMipLevels to be limited to the maximum allowed mipmap pyramid size corresponding to the actual maximum supported size for the format (internal issue 256). * Modify the <<features-extentperimagetype,Allowed Extent Values Based On Image Type>> section so the allowed maximum extent is the maximum image dimension supported for each dimension of the type of texture being queried (internal issue 257). * Clarify in the <<spirvenv-module-validation,Validation Rules within a Module>> section that at least one of the code:LocalSize execution mode or code:WorkgroupSize decoration is required for each compute shader entry point in a shader module (internal issue 279). * Add validity rules for formats in flink:vkCmdClearColorImage and flink:vkCmdClearDepthStencilImage (internal issue 283). * Clarify that slink:VkImageFormatProperties::pname:maxResourceSize is an upper bound, and that it may not be possible to create an image anywhere near that size (internal issue 284). Other Commits: * Fix various minor markup errors reported by validation scripts. * Change copyright from Khronos Free Use License to Apache 2.0 license on relevant script/XML/header files. This does not affect the specification source copyright.
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a sname:VkInstance.
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To query the layers available to a given physical device, call:
include::../protos/vkEnumerateDeviceLayerProperties.txt[]
* pname:physicalDevice is the physical device that will be queried.
Change log for February 25, 2015 Vulkan 1.0.4 spec update: * Bump API patch number from 3 to 4 for the first public update to the spec. Add patch number to the spec title (this will be done automatically from XML, later). * Fixes for numerous editorial issues. Regularize descriptions of variable-length array queries. Properly tag enumerants so they come out in the right font (many were mislabeled in usage tags in vk.xml, or not tagged). Spelling and markup corrections (public issue 4). * Fix typos and clearly separate description of different types of memory areas (public issue 5). * Use standards-compliant preprocessor guard symbols on headers (public issue 7). * Note that Github users can't currently set labels on issues, and recommend a fallback approach (public issue 15). * Use latexmath prefix on len= attributes (public issue 29). * Make flink:vkCmdUpdateBuffer pname:dataSize limit consistent (public issue 65). * Add VK_KHR_mirror_clamp_to_edge extension to core API branch, as an optional feature not introducing new commands or enums (internal issue 104). * Cleanup invariance language inherited from the GL specification to not refer to nonexistent (GL-specific) state (internal issue 111). * Modify the flink:vkCmdDrawIndexed pname:vertexOffset definition to not be the "base offset within the index buffer" but rather the "value added to the vertex index before indexing into the vertex buffer" (internal issue 118). * Fix drawing chapter in the "Programmable Primitive Shading" section where it described categories of drawing commands. It referenced flink:vkCmdDrawIndexed twice. Replace the second reference with flink:vkCmdDrawIndexedIndirect (internal issue 119). * Typo fixed in <<sparsememory-examples-advanced,Advanced Sparse Resources>> sparse memory example (internal issue 122). * Add flink:VkDisplayPlaneAlphaFlagsKHR to <require> section of VK_KHR_display extension (internal issue 125) * Add missing optional="false,true" to flink:vkGetImageSparseMemoryRequirements pname:pSparseMemoryRequirementCount parameter (internal issue 132) * Rename ename:VK_STRUCTURE_TYPE_DEBUG_REPORT_CREATE_INFO_EXT to ename:VK_STRUCTURE_TYPE_DEBUG_REPORT_CALLBACK_CREATE_INFO_EXT (internal issue 133) * Fix a handful of broken cross-references in the <<samplers,Samplers>> chapter (internal issue 134). * Fix "Input Attachement" GLSL example to use correct syntax (internal issue 135). * Update XML schema and documentation to accomodate recently added attributes for validity. Add some introductory material describing design choices and pointing to the public repository to file issues. * Put include of validity in the core spec extensions chapter on its own line, so that asciidoc is happy. * Fix vertexOffset language to specify that it's the value added to the vertex index before indexing into the vertex buffer, not the base offset within the index buffer. * Fix error in the description of flink:vkCmdNextSubpass.
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* pname:pPropertyCount is a pointer to an integer related to the number of
layer properties available or queried, as described below.
* pname:pProperties is either `NULL` or a pointer to an array of
slink:VkLayerProperties structures.
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include::../validity/protos/vkEnumerateDeviceLayerProperties.txt[]
To enable a device layer, the name of the layer should be added to the
pname:ppEnabledLayerNames member of slink:VkDeviceCreateInfo when creating
Change log for April 22, 2016 Vulkan 1.0.11 spec update: * Bump API patch number and header version number to 11 for this update. Github Issues: * Clarify the WSI extension language by switching from the fuzzier "ownership" language to more-consistent "acquire" language (public issue 117). * Clarify that memory barriers apply to all commands in the dependency chains in the flink:vkGetRenderAreaGranularity command and the <<synchronization-execution-and-memory-dependencies,Execution And Memory Dependencies>> section (public issue 132). * Clarify that a queue family is a set of queues in the <<fundamentals-execmodel,Execution Model>> section (public issue 166). * Removed requirement from valid usage language that VkPresentInfoKHR::waitSemaphoreCount must be greater than 0 (public issue 171). * Fix broken internal links, describe structures consistently, use consistent style for SPIR-V codewords, and tag normative terms that were missing asciidoc tags (public issue 183 and ancillary markup/normative language fixes). * Fix typos for slink:VkPhysicalDeviceLimits member names in slink:VkImageCreateInfo validity language (public issue 184). Internal Issues: * Document that the requested patch version number specified as part of slink:VkApplicationInfo::pname:apiVersion is ignored when creating an instance (internal issue 176). * Clarify handling of extension structs in the <<fundamentals-validusageValid Usage>> section (internal issue 254). * Update required slink:VkImageFormatProperties::pname:maxMipLevels to be limited to the maximum allowed mipmap pyramid size corresponding to the actual maximum supported size for the format (internal issue 256). * Modify the <<features-extentperimagetype,Allowed Extent Values Based On Image Type>> section so the allowed maximum extent is the maximum image dimension supported for each dimension of the type of texture being queried (internal issue 257). * Clarify in the <<spirvenv-module-validation,Validation Rules within a Module>> section that at least one of the code:LocalSize execution mode or code:WorkgroupSize decoration is required for each compute shader entry point in a shader module (internal issue 279). * Add validity rules for formats in flink:vkCmdClearColorImage and flink:vkCmdClearDepthStencilImage (internal issue 283). * Clarify that slink:VkImageFormatProperties::pname:maxResourceSize is an upper bound, and that it may not be possible to create an image anywhere near that size (internal issue 284). Other Commits: * Fix various minor markup errors reported by validation scripts. * Change copyright from Khronos Free Use License to Apache 2.0 license on relevant script/XML/header files. This does not affect the specification source copyright.
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a sname:VkDevice.
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Change log for February 25, 2015 Vulkan 1.0.4 spec update: * Bump API patch number from 3 to 4 for the first public update to the spec. Add patch number to the spec title (this will be done automatically from XML, later). * Fixes for numerous editorial issues. Regularize descriptions of variable-length array queries. Properly tag enumerants so they come out in the right font (many were mislabeled in usage tags in vk.xml, or not tagged). Spelling and markup corrections (public issue 4). * Fix typos and clearly separate description of different types of memory areas (public issue 5). * Use standards-compliant preprocessor guard symbols on headers (public issue 7). * Note that Github users can't currently set labels on issues, and recommend a fallback approach (public issue 15). * Use latexmath prefix on len= attributes (public issue 29). * Make flink:vkCmdUpdateBuffer pname:dataSize limit consistent (public issue 65). * Add VK_KHR_mirror_clamp_to_edge extension to core API branch, as an optional feature not introducing new commands or enums (internal issue 104). * Cleanup invariance language inherited from the GL specification to not refer to nonexistent (GL-specific) state (internal issue 111). * Modify the flink:vkCmdDrawIndexed pname:vertexOffset definition to not be the "base offset within the index buffer" but rather the "value added to the vertex index before indexing into the vertex buffer" (internal issue 118). * Fix drawing chapter in the "Programmable Primitive Shading" section where it described categories of drawing commands. It referenced flink:vkCmdDrawIndexed twice. Replace the second reference with flink:vkCmdDrawIndexedIndirect (internal issue 119). * Typo fixed in <<sparsememory-examples-advanced,Advanced Sparse Resources>> sparse memory example (internal issue 122). * Add flink:VkDisplayPlaneAlphaFlagsKHR to <require> section of VK_KHR_display extension (internal issue 125) * Add missing optional="false,true" to flink:vkGetImageSparseMemoryRequirements pname:pSparseMemoryRequirementCount parameter (internal issue 132) * Rename ename:VK_STRUCTURE_TYPE_DEBUG_REPORT_CREATE_INFO_EXT to ename:VK_STRUCTURE_TYPE_DEBUG_REPORT_CALLBACK_CREATE_INFO_EXT (internal issue 133) * Fix a handful of broken cross-references in the <<samplers,Samplers>> chapter (internal issue 134). * Fix "Input Attachement" GLSL example to use correct syntax (internal issue 135). * Update XML schema and documentation to accomodate recently added attributes for validity. Add some introductory material describing design choices and pointing to the public repository to file issues. * Put include of validity in the core spec extensions chapter on its own line, so that asciidoc is happy. * Fix vertexOffset language to specify that it's the value added to the vertex index before indexing into the vertex buffer, not the base offset within the index buffer. * Fix error in the description of flink:vkCmdNextSubpass.
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For both flink:vkEnumerateInstanceLayerProperties and
flink:vkEnumerateDeviceLayerProperties, if pname:pProperties is `NULL`, then
the number of layer properties available is returned in pname:pPropertyCount.
Otherwise, pname:pPropertyCount must: point to a variable set by the user to
the number of elements in the pname:pProperties array, and on return the
variable is overwritten with the number of structures actually written to
Change log for March 10, 2016 Vulkan 1.0.6 spec update: * Bump API patch number and header version number to 6 for this update. Github Issues: * Define 'invocation group' for compute and graphics shaders. Cleanup definition and use of 'workgroup', and add glossary entries (public issue 1). * Various minor editorial fixes (public issue 33). * Clarify locations for block members in the &lt;&lt;interfaces-iointerfaces-locations,Location Assignment>> section (public issue 45). * Editorial fixes for &lt;&lt;commandbuffer-allocation,Command Buffer Allocation>> section (public issues 54, 59). * Clarify behavior of depth test in the &lt;&lt;fragops-depth,Depth Test&gt;&gt; section (public issues 80, 81). * Remove discussion of return codes from flink:vkGetPhysicalDeviceSparseImageFormatProperties and flink:vkGetImageSparseMemoryRequirements, which don't return values (public issue 82). * Allow flink:vkCmdDrawIndirect and flink:vkCmdDrawIndexedIndirect pname:drawCount of 0, as well as 1, when the multiDrawIndirect feature is not supported (public issue 88). * Remove confusing wording in the &lt;&lt;features-limits,Limits>> section describing the slink:VkPhysicalDeviceLimits pname:minTexelBufferOffsetAlignment, pname:minUniformBufferOffsetAlignment, and pname:minStorageBufferOffsetAlignment members as both minimums and maximums (public issue 91). * Clarified that only the RGB components should be affected in places where sRGB is referred to in the spec, such as ASTC formats. Minor re-wording to avoid "color space" when actively incorrect, now that we refer to the Data Format Spec which actually makes a distinction between color space and transfer function (public issue 94). * Treat pname:pPropertyCount == 0 consistently in flink:vkEnumerateInstanceLayerProperties and flink:vkEnumerateDeviceLayerProperties (public issue 99) * Cleanup minor editorial issues in chapters 14-17 (public issue 100). * Clarify definition of flink:vkEnumerateInstanceExtensionProperties and flink:vkEnumerateDeviceExtensionProperties (public issue 101). * Define the flink:vkEnumerateInstanceExtensionProperties and flink:vkEnumerateDeviceExtensionProperties pname:pLayerName parameter to be a pointer to a null-terminated UTF-8 string (public issue 101). * Rearrange "Missing information" references in mandatory format tables (public issue 101). * Clarify that the enumerated extensions returned by flink:vkEnumerateInstanceExtensionProperties and flink:vkEnumerateDeviceExtensionProperties will only include extensions provided by the platform or extensions implemented in implicitly enabled layers (public issue 101). * Miscellaneous editorial fixes. Include the Vulkan spec patch number in the PDF title. Fix label on &lt;&lt;fig-non-strict-lines,Non strict lines>> diagram. Use more easily distinguished symbols in tables in the &lt;&lt;features-required-format-support,Required Format Support>> section. Don't require FQDNs used as layer names be encoded in lower case if not possible, in the &lt;&lt;extensions-naming-conventions, Extension and Layer Naming Conventions>> section (public issues 101, 119, 121). Internal Issues: * Fixed excessive spacing in tables in XHTML (internal issue 18). * Clarify that ename:VK_COMMAND_BUFFER_USAGE_ONE_TIME_SUBMIT_BIT applies to secondary command buffers. Previously spec only referred to the members of pname:pCommandBuffers being affected by this bit. Added a separate slink:VkSubmitInfo Valid Usage restriction specifying that ename:VK_COMMAND_BUFFER_USAGE_ONE_TIME_SUBMIT_BIT also applies to any secondary command buffers that are recorded into the primary command buffers in pname:pCommandBuffers (internal issue 106). * Clarify that slink:VkDeviceCreateInfo::pname:pEnabledFeatures can be NULL (internal issue 117). * Remove "the value of" where it is redundant (e.g. speaking of an API parameter, struct member, or SPIR-V variable, but not when speaking of color components) (internal issue 175). * Forced patch version to always be 0 in the header. Add a "VK_API_VERSION_<major>_<minor>" macro for people to use to do the right thing. Add a VK_HEADER_VERSION which captures the header release number independent of the spec patch number (internal issue 176). * Correct description of slink:VkPipelineShaderStageCreateInfo::pname:pName to "a pointer to a null-terminated UTF-8 string" (internal issue #197). Other Commits: * Updated DataFormat spec reference to the new date for revision 5 of that spec. * Fixed KEEP option (to retain LaTeX intermediate files) in the Makefile to be included when edited there, as well as set on the command line. * Reserve and add "VK_IMG_filter_cubic" to the registry, and implement script functionality to add and remove validity from existing functions. Includes schema and readme changes. * Update GL_KHR_vulkan_glsl so push_constants do not have descriptor sets.
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pname:pProperties. If pname:pPropertyCount is less than the
Change log for February 25, 2015 Vulkan 1.0.4 spec update: * Bump API patch number from 3 to 4 for the first public update to the spec. Add patch number to the spec title (this will be done automatically from XML, later). * Fixes for numerous editorial issues. Regularize descriptions of variable-length array queries. Properly tag enumerants so they come out in the right font (many were mislabeled in usage tags in vk.xml, or not tagged). Spelling and markup corrections (public issue 4). * Fix typos and clearly separate description of different types of memory areas (public issue 5). * Use standards-compliant preprocessor guard symbols on headers (public issue 7). * Note that Github users can't currently set labels on issues, and recommend a fallback approach (public issue 15). * Use latexmath prefix on len= attributes (public issue 29). * Make flink:vkCmdUpdateBuffer pname:dataSize limit consistent (public issue 65). * Add VK_KHR_mirror_clamp_to_edge extension to core API branch, as an optional feature not introducing new commands or enums (internal issue 104). * Cleanup invariance language inherited from the GL specification to not refer to nonexistent (GL-specific) state (internal issue 111). * Modify the flink:vkCmdDrawIndexed pname:vertexOffset definition to not be the "base offset within the index buffer" but rather the "value added to the vertex index before indexing into the vertex buffer" (internal issue 118). * Fix drawing chapter in the "Programmable Primitive Shading" section where it described categories of drawing commands. It referenced flink:vkCmdDrawIndexed twice. Replace the second reference with flink:vkCmdDrawIndexedIndirect (internal issue 119). * Typo fixed in <<sparsememory-examples-advanced,Advanced Sparse Resources>> sparse memory example (internal issue 122). * Add flink:VkDisplayPlaneAlphaFlagsKHR to <require> section of VK_KHR_display extension (internal issue 125) * Add missing optional="false,true" to flink:vkGetImageSparseMemoryRequirements pname:pSparseMemoryRequirementCount parameter (internal issue 132) * Rename ename:VK_STRUCTURE_TYPE_DEBUG_REPORT_CREATE_INFO_EXT to ename:VK_STRUCTURE_TYPE_DEBUG_REPORT_CALLBACK_CREATE_INFO_EXT (internal issue 133) * Fix a handful of broken cross-references in the <<samplers,Samplers>> chapter (internal issue 134). * Fix "Input Attachement" GLSL example to use correct syntax (internal issue 135). * Update XML schema and documentation to accomodate recently added attributes for validity. Add some introductory material describing design choices and pointing to the public repository to file issues. * Put include of validity in the core spec extensions chapter on its own line, so that asciidoc is happy. * Fix vertexOffset language to specify that it's the value added to the vertex index before indexing into the vertex buffer, not the base offset within the index buffer. * Fix error in the description of flink:vkCmdNextSubpass.
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number of layer properties available, at most pname:pPropertyCount
structures will be written. If pname:pPropertyCount is smaller than the
number of layers available, ename:VK_INCOMPLETE will be returned instead of
Change log for March 4, 2016 Vulkan 1.0.5 spec update: * Bump API patch number to 5 for this update. Github Issues: * Correctly describe slink:VkPhysicalDeviceProperties pname:deviceName member as a string, not a pointer to a string. Also one typo fix for "hetereogeneous" (public issue 4). * Replace maynot: macro with may: not, and "may: or maynot:" with "may:" (public issue 4). * Clarify that redundantly setting the state of a fence or event has no effect (public issue 4). * Minor fixes to ref pages to track descriptions of memory bits that changed in the core spec. Fix name of a member in the description of sname:sname:VkPipelineMultisampleStateCreateInfo (public issues 8, 13). * Remove redundant validity statement for sname:VkGraphicsPipelineCreateInfo::pname:stageCount (public issue 14). * Fix typos in chapters 7-9 (public issue 14). * Clarify the example demonstrating the behavior of code:OpMemoryBarrier in the &lt;&lt;shaders-execution-memory-ordering,shader memory acces ordering>> section (public issue 16). * Specify that freeing mapped memory implicitly unmaps the memory in the description of flink:vkFreeMemory (public issue 17). * Forbid allocation callbacks from calling into the API in the &lt;&lt;memory-allocation,memory allocation>> section (public issue 20). * Add missing validity rules about size being greater than 0 and offset being less than size of object. Fix flink:VkMappedMemoryRange's misinterpretation of offset (public issues 27, 31). * Add validity rule disallowing overlapping source/destination descriptors in flink:VkCopyDescriptorSet (public issue 32). * Clarify that array and matrix stride has to be a multiple of the base alignment of the array or matrix in the &lt;&lt;interfaces-resources-layout,Offset and Stride Assignment>> section (public issue 38). * Correct parenthesis floor nesting error in equation for &lt;&lt;textures-RGB-sexp,RGB to shared exponent conversion>>. Clarify case of when exp' is forced to 0, avoiding log2(0) undefined problem (public issue 40). * Remove redundant statement from the code:FragDepth description in the &lt;&lt;interfaces-builtin-variables,Built-In Variables>> section (public issue 47). * Define the clamping of the &lt;&lt;textures-level-of-detail-operation,bias added to the scale factor>> by linking to the slink:VkPhysicalDevice feature pname:maxSamplerLodBias (public issue 64). * Fix typo "optimal linear resources" and clarify the set of resources &lt;&lt;features-limits-bufferImageGranularity,the pname:bufferImageGranularity resource>> applies to (public issue 67). * Replace 'descriptor accessed by a pipeline' language for sname:VkDescriptorSetAllocateInfo with more precise phrasing about binding a descriptor set before a command that invokes work using that set (public issue 69). * tstripadj.svg contained an Inkscape tag which caused Firefox and IE 11 to fail to render it, and was illegal SVG. Generating Plain SVG from the Inkscape SVG source fixes this (public issue 70). * Fix validity for sname:VkVertexInputBindingDescription and sname:VkVertexInputAttributeDescription numbers (public issue 72). Internal Issues: * Clarify the meaning of ename:VK_FORMAT_FEATURE_SAMPLED_IMAGE_FILTER_LINEAR_BIT in elink:VkFormatFeatureFlagBits with respect to depth compare (internal issue 107). * Added a note explaining that ename:VK_QUEUE_TRANSFER_BIT may or may not be reported for a queue family that already supports ename:VK_QUEUE_GRAPHICS_BIT or ename:VK_QUEUE_COMPUTE_BIT as the former is a strict subset of the latter ones (internal issue 116). * Add validity language for sname:VkDescriptorSetAllocateInfo about exceeding the descriptor pool capacity (internal issue 140). * Add ename:VK_INCOMPLETE success code for flink:vkEnumeratePhysicalDevices query (internal issue 163). Other Commits: * Add the VK_NV_glsl_shader extension definitions to the API. * Update GL_KHR_vulkan_glsl with 1) origin_upper_left as default 2) specialization array constant semantics. * Corrected/updated Data Format Specification date.
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ename:VK_SUCCESS, to indicate that not all the available layer properties
were returned.
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Change log for April 22, 2016 Vulkan 1.0.11 spec update: * Bump API patch number and header version number to 11 for this update. Github Issues: * Clarify the WSI extension language by switching from the fuzzier "ownership" language to more-consistent "acquire" language (public issue 117). * Clarify that memory barriers apply to all commands in the dependency chains in the flink:vkGetRenderAreaGranularity command and the <<synchronization-execution-and-memory-dependencies,Execution And Memory Dependencies>> section (public issue 132). * Clarify that a queue family is a set of queues in the <<fundamentals-execmodel,Execution Model>> section (public issue 166). * Removed requirement from valid usage language that VkPresentInfoKHR::waitSemaphoreCount must be greater than 0 (public issue 171). * Fix broken internal links, describe structures consistently, use consistent style for SPIR-V codewords, and tag normative terms that were missing asciidoc tags (public issue 183 and ancillary markup/normative language fixes). * Fix typos for slink:VkPhysicalDeviceLimits member names in slink:VkImageCreateInfo validity language (public issue 184). Internal Issues: * Document that the requested patch version number specified as part of slink:VkApplicationInfo::pname:apiVersion is ignored when creating an instance (internal issue 176). * Clarify handling of extension structs in the <<fundamentals-validusageValid Usage>> section (internal issue 254). * Update required slink:VkImageFormatProperties::pname:maxMipLevels to be limited to the maximum allowed mipmap pyramid size corresponding to the actual maximum supported size for the format (internal issue 256). * Modify the <<features-extentperimagetype,Allowed Extent Values Based On Image Type>> section so the allowed maximum extent is the maximum image dimension supported for each dimension of the type of texture being queried (internal issue 257). * Clarify in the <<spirvenv-module-validation,Validation Rules within a Module>> section that at least one of the code:LocalSize execution mode or code:WorkgroupSize decoration is required for each compute shader entry point in a shader module (internal issue 279). * Add validity rules for formats in flink:vkCmdClearColorImage and flink:vkCmdClearDepthStencilImage (internal issue 283). * Clarify that slink:VkImageFormatProperties::pname:maxResourceSize is an upper bound, and that it may not be possible to create an image anywhere near that size (internal issue 284). Other Commits: * Fix various minor markup errors reported by validation scripts. * Change copyright from Khronos Free Use License to Apache 2.0 license on relevant script/XML/header files. This does not affect the specification source copyright.
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The sname:VkLayerProperties structure is defined as:
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include::../structs/VkLayerProperties.txt[]
* pname:layerName is a null-terminated UTF-8 string specifying the name of
the layer. Use this name in the pname:ppEnabledLayerNames array passed
in the slink:VkInstanceCreateInfo and slink:VkDeviceCreateInfo
structures passed to flink:vkCreateInstance and flink:vkCreateDevice,
respectively, to enable this layer for an instance or device.
Change log for April 29, 2016 Vulkan 1.0.12 spec update: * Bump API patch number and header version number to 12 for this update. Github Issues: * Change valid usage statements intended to be "sub-points" to be actual sub-points (public issue 66). * Replace double negation in description of slink:VkRenderPassBeginInfo::pname:pClearValues (based on public merge 142). * Cleanup minor typos in spec, ref pages and XML, including those proposed in public pull requests 144, 150, 151, 167, 168, 181, and 186. * Use *strict subset* in describing the partial order of memory property types for slink:VkMemoryType, and update the style guide accordingly (public issue 190). * Fix various "a image" -> "an image" typos (public issue 191). * Note in the <<fundamentals-validusage,Valid Usage>> and <<extensions-interactions,Extension Interactions>> sections that structures defined by extensions which may be passed in structure chains using the ptext:pNext member must: include initial ptext:sType and ptext:pNext members (public issue 192). Internal Issues: * Remove duplicate language from the description of the pname:fence parameter to flink:vkQueueSubmit and improve validity language (internal issue 91). * Added documentation for "optional" attribute to XML readme.tex/pdf (internal issue 149). * Clarify the host-side data validity rules and behavior of flink:vkFlushMappedMemoryRanges and flink:vkInvalidateMappedMemoryRanges (internal issue 266). Other Commits: * Added clarification to flink:vkCmdFillBuffer regarding the use of ename:VK_WHOLE_SIZE. * Fixed and documented implementation of "validextensionstructs" attribute. in XML processing scripts and readme.tex/pdf. * Add missing validity statements to flink:vkResetEvent and flink:vkCmdResetEvent. * Fix validity for the ename:VK_FORMAT_FEATURE_SAMPLED_IMAGE_FILTER_LINEAR_BIT flag. Correct all the draw/dispatch commands to mention optimally tiled images as well as linear tiled images, and say image VIEWS instead of images. Add validity statement to flink:vkCmdBlitImage * Replace the {apiname} macro with hardcoded "Vulkan", now that we've committed to that name. * Add the VK_AMD_rasterization_order extension to vk.xml.
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* pname:specVersion is the Vulkan version the layer was written to,
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encoded as described in the <<fundamentals-versionnum,API Version
Numbers and Semantics>> section.
* pname:implementationVersion is the version of this layer. It is an
integer, increasing with backward compatible changes.
* pname:description is a null-terminated UTF-8 string providing additional
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details that can: be used by the application to identify the layer.
include::../validity/structs/VkLayerProperties.txt[]
Change log for April 29, 2016 Vulkan 1.0.12 spec update: * Bump API patch number and header version number to 12 for this update. Github Issues: * Change valid usage statements intended to be "sub-points" to be actual sub-points (public issue 66). * Replace double negation in description of slink:VkRenderPassBeginInfo::pname:pClearValues (based on public merge 142). * Cleanup minor typos in spec, ref pages and XML, including those proposed in public pull requests 144, 150, 151, 167, 168, 181, and 186. * Use *strict subset* in describing the partial order of memory property types for slink:VkMemoryType, and update the style guide accordingly (public issue 190). * Fix various "a image" -> "an image" typos (public issue 191). * Note in the <<fundamentals-validusage,Valid Usage>> and <<extensions-interactions,Extension Interactions>> sections that structures defined by extensions which may be passed in structure chains using the ptext:pNext member must: include initial ptext:sType and ptext:pNext members (public issue 192). Internal Issues: * Remove duplicate language from the description of the pname:fence parameter to flink:vkQueueSubmit and improve validity language (internal issue 91). * Added documentation for "optional" attribute to XML readme.tex/pdf (internal issue 149). * Clarify the host-side data validity rules and behavior of flink:vkFlushMappedMemoryRanges and flink:vkInvalidateMappedMemoryRanges (internal issue 266). Other Commits: * Added clarification to flink:vkCmdFillBuffer regarding the use of ename:VK_WHOLE_SIZE. * Fixed and documented implementation of "validextensionstructs" attribute. in XML processing scripts and readme.tex/pdf. * Add missing validity statements to flink:vkResetEvent and flink:vkCmdResetEvent. * Fix validity for the ename:VK_FORMAT_FEATURE_SAMPLED_IMAGE_FILTER_LINEAR_BIT flag. Correct all the draw/dispatch commands to mention optimally tiled images as well as linear tiled images, and say image VIEWS instead of images. Add validity statement to flink:vkCmdBlitImage * Replace the {apiname} macro with hardcoded "Vulkan", now that we've committed to that name. * Add the VK_AMD_rasterization_order extension to vk.xml.
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Loader implementations may: provide mechanisms outside the Vulkan API for
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enabling specific layers. Layers enabled through such a mechanism are
_implicitly enabled_, while layers enabled by including the layer name in
the pname:ppEnabledLayerNames member of slink:VkDeviceCreateInfo are
_explicitly enabled_. Except where otherwise specified, implicitly enabled
and explicitly enabled layers differ only in the way they are enabled.
Explicitly enabling a layer that is implicitly enabled has no additional
effect.
Change log for April 22, 2016 Vulkan 1.0.11 spec update: * Bump API patch number and header version number to 11 for this update. Github Issues: * Clarify the WSI extension language by switching from the fuzzier "ownership" language to more-consistent "acquire" language (public issue 117). * Clarify that memory barriers apply to all commands in the dependency chains in the flink:vkGetRenderAreaGranularity command and the <<synchronization-execution-and-memory-dependencies,Execution And Memory Dependencies>> section (public issue 132). * Clarify that a queue family is a set of queues in the <<fundamentals-execmodel,Execution Model>> section (public issue 166). * Removed requirement from valid usage language that VkPresentInfoKHR::waitSemaphoreCount must be greater than 0 (public issue 171). * Fix broken internal links, describe structures consistently, use consistent style for SPIR-V codewords, and tag normative terms that were missing asciidoc tags (public issue 183 and ancillary markup/normative language fixes). * Fix typos for slink:VkPhysicalDeviceLimits member names in slink:VkImageCreateInfo validity language (public issue 184). Internal Issues: * Document that the requested patch version number specified as part of slink:VkApplicationInfo::pname:apiVersion is ignored when creating an instance (internal issue 176). * Clarify handling of extension structs in the <<fundamentals-validusageValid Usage>> section (internal issue 254). * Update required slink:VkImageFormatProperties::pname:maxMipLevels to be limited to the maximum allowed mipmap pyramid size corresponding to the actual maximum supported size for the format (internal issue 256). * Modify the <<features-extentperimagetype,Allowed Extent Values Based On Image Type>> section so the allowed maximum extent is the maximum image dimension supported for each dimension of the type of texture being queried (internal issue 257). * Clarify in the <<spirvenv-module-validation,Validation Rules within a Module>> section that at least one of the code:LocalSize execution mode or code:WorkgroupSize decoration is required for each compute shader entry point in a shader module (internal issue 279). * Add validity rules for formats in flink:vkCmdClearColorImage and flink:vkCmdClearDepthStencilImage (internal issue 283). * Clarify that slink:VkImageFormatProperties::pname:maxResourceSize is an upper bound, and that it may not be possible to create an image anywhere near that size (internal issue 284). Other Commits: * Fix various minor markup errors reported by validation scripts. * Change copyright from Khronos Free Use License to Apache 2.0 license on relevant script/XML/header files. This does not affect the specification source copyright.
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[[extended-functionality-extensions]]
== Extensions
Change log for April 29, 2016 Vulkan 1.0.12 spec update: * Bump API patch number and header version number to 12 for this update. Github Issues: * Change valid usage statements intended to be "sub-points" to be actual sub-points (public issue 66). * Replace double negation in description of slink:VkRenderPassBeginInfo::pname:pClearValues (based on public merge 142). * Cleanup minor typos in spec, ref pages and XML, including those proposed in public pull requests 144, 150, 151, 167, 168, 181, and 186. * Use *strict subset* in describing the partial order of memory property types for slink:VkMemoryType, and update the style guide accordingly (public issue 190). * Fix various "a image" -> "an image" typos (public issue 191). * Note in the <<fundamentals-validusage,Valid Usage>> and <<extensions-interactions,Extension Interactions>> sections that structures defined by extensions which may be passed in structure chains using the ptext:pNext member must: include initial ptext:sType and ptext:pNext members (public issue 192). Internal Issues: * Remove duplicate language from the description of the pname:fence parameter to flink:vkQueueSubmit and improve validity language (internal issue 91). * Added documentation for "optional" attribute to XML readme.tex/pdf (internal issue 149). * Clarify the host-side data validity rules and behavior of flink:vkFlushMappedMemoryRanges and flink:vkInvalidateMappedMemoryRanges (internal issue 266). Other Commits: * Added clarification to flink:vkCmdFillBuffer regarding the use of ename:VK_WHOLE_SIZE. * Fixed and documented implementation of "validextensionstructs" attribute. in XML processing scripts and readme.tex/pdf. * Add missing validity statements to flink:vkResetEvent and flink:vkCmdResetEvent. * Fix validity for the ename:VK_FORMAT_FEATURE_SAMPLED_IMAGE_FILTER_LINEAR_BIT flag. Correct all the draw/dispatch commands to mention optimally tiled images as well as linear tiled images, and say image VIEWS instead of images. Add validity statement to flink:vkCmdBlitImage * Replace the {apiname} macro with hardcoded "Vulkan", now that we've committed to that name. * Add the VK_AMD_rasterization_order extension to vk.xml.
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Extensions may: define new Vulkan commands, structures, and enumerants.
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For compilation purposes, the interfaces defined by registered extensions,
including new structures and enumerants as well as function pointer types
for new commands, are defined in the Khronos-supplied +vulkan.h+ together
Change log for March 4, 2016 Vulkan 1.0.5 spec update: * Bump API patch number to 5 for this update. Github Issues: * Correctly describe slink:VkPhysicalDeviceProperties pname:deviceName member as a string, not a pointer to a string. Also one typo fix for "hetereogeneous" (public issue 4). * Replace maynot: macro with may: not, and "may: or maynot:" with "may:" (public issue 4). * Clarify that redundantly setting the state of a fence or event has no effect (public issue 4). * Minor fixes to ref pages to track descriptions of memory bits that changed in the core spec. Fix name of a member in the description of sname:sname:VkPipelineMultisampleStateCreateInfo (public issues 8, 13). * Remove redundant validity statement for sname:VkGraphicsPipelineCreateInfo::pname:stageCount (public issue 14). * Fix typos in chapters 7-9 (public issue 14). * Clarify the example demonstrating the behavior of code:OpMemoryBarrier in the &lt;&lt;shaders-execution-memory-ordering,shader memory acces ordering>> section (public issue 16). * Specify that freeing mapped memory implicitly unmaps the memory in the description of flink:vkFreeMemory (public issue 17). * Forbid allocation callbacks from calling into the API in the &lt;&lt;memory-allocation,memory allocation>> section (public issue 20). * Add missing validity rules about size being greater than 0 and offset being less than size of object. Fix flink:VkMappedMemoryRange's misinterpretation of offset (public issues 27, 31). * Add validity rule disallowing overlapping source/destination descriptors in flink:VkCopyDescriptorSet (public issue 32). * Clarify that array and matrix stride has to be a multiple of the base alignment of the array or matrix in the &lt;&lt;interfaces-resources-layout,Offset and Stride Assignment>> section (public issue 38). * Correct parenthesis floor nesting error in equation for &lt;&lt;textures-RGB-sexp,RGB to shared exponent conversion>>. Clarify case of when exp' is forced to 0, avoiding log2(0) undefined problem (public issue 40). * Remove redundant statement from the code:FragDepth description in the &lt;&lt;interfaces-builtin-variables,Built-In Variables>> section (public issue 47). * Define the clamping of the &lt;&lt;textures-level-of-detail-operation,bias added to the scale factor>> by linking to the slink:VkPhysicalDevice feature pname:maxSamplerLodBias (public issue 64). * Fix typo "optimal linear resources" and clarify the set of resources &lt;&lt;features-limits-bufferImageGranularity,the pname:bufferImageGranularity resource>> applies to (public issue 67). * Replace 'descriptor accessed by a pipeline' language for sname:VkDescriptorSetAllocateInfo with more precise phrasing about binding a descriptor set before a command that invokes work using that set (public issue 69). * tstripadj.svg contained an Inkscape tag which caused Firefox and IE 11 to fail to render it, and was illegal SVG. Generating Plain SVG from the Inkscape SVG source fixes this (public issue 70). * Fix validity for sname:VkVertexInputBindingDescription and sname:VkVertexInputAttributeDescription numbers (public issue 72). Internal Issues: * Clarify the meaning of ename:VK_FORMAT_FEATURE_SAMPLED_IMAGE_FILTER_LINEAR_BIT in elink:VkFormatFeatureFlagBits with respect to depth compare (internal issue 107). * Added a note explaining that ename:VK_QUEUE_TRANSFER_BIT may or may not be reported for a queue family that already supports ename:VK_QUEUE_GRAPHICS_BIT or ename:VK_QUEUE_COMPUTE_BIT as the former is a strict subset of the latter ones (internal issue 116). * Add validity language for sname:VkDescriptorSetAllocateInfo about exceeding the descriptor pool capacity (internal issue 140). * Add ename:VK_INCOMPLETE success code for flink:vkEnumeratePhysicalDevices query (internal issue 163). Other Commits: * Add the VK_NV_glsl_shader extension definitions to the API. * Update GL_KHR_vulkan_glsl with 1) origin_upper_left as default 2) specialization array constant semantics. * Corrected/updated Data Format Specification date.
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with the core API. However, commands defined by extensions may: not be
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available for static linking - in which case function pointers to these
commands should: be queried at runtime as described in
<<initialization-functionpointers>>. Extensions may: be provided by layers
Change log for April 29, 2016 Vulkan 1.0.12 spec update: * Bump API patch number and header version number to 12 for this update. Github Issues: * Change valid usage statements intended to be "sub-points" to be actual sub-points (public issue 66). * Replace double negation in description of slink:VkRenderPassBeginInfo::pname:pClearValues (based on public merge 142). * Cleanup minor typos in spec, ref pages and XML, including those proposed in public pull requests 144, 150, 151, 167, 168, 181, and 186. * Use *strict subset* in describing the partial order of memory property types for slink:VkMemoryType, and update the style guide accordingly (public issue 190). * Fix various "a image" -> "an image" typos (public issue 191). * Note in the <<fundamentals-validusage,Valid Usage>> and <<extensions-interactions,Extension Interactions>> sections that structures defined by extensions which may be passed in structure chains using the ptext:pNext member must: include initial ptext:sType and ptext:pNext members (public issue 192). Internal Issues: * Remove duplicate language from the description of the pname:fence parameter to flink:vkQueueSubmit and improve validity language (internal issue 91). * Added documentation for "optional" attribute to XML readme.tex/pdf (internal issue 149). * Clarify the host-side data validity rules and behavior of flink:vkFlushMappedMemoryRanges and flink:vkInvalidateMappedMemoryRanges (internal issue 266). Other Commits: * Added clarification to flink:vkCmdFillBuffer regarding the use of ename:VK_WHOLE_SIZE. * Fixed and documented implementation of "validextensionstructs" attribute. in XML processing scripts and readme.tex/pdf. * Add missing validity statements to flink:vkResetEvent and flink:vkCmdResetEvent. * Fix validity for the ename:VK_FORMAT_FEATURE_SAMPLED_IMAGE_FILTER_LINEAR_BIT flag. Correct all the draw/dispatch commands to mention optimally tiled images as well as linear tiled images, and say image VIEWS instead of images. Add validity statement to flink:vkCmdBlitImage * Replace the {apiname} macro with hardcoded "Vulkan", now that we've committed to that name. * Add the VK_AMD_rasterization_order extension to vk.xml.
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as well as by a Vulkan implementation.
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To query the available instance extensions, call:
include::../protos/vkEnumerateInstanceExtensionProperties.txt[]
Change log for March 10, 2016 Vulkan 1.0.6 spec update: * Bump API patch number and header version number to 6 for this update. Github Issues: * Define 'invocation group' for compute and graphics shaders. Cleanup definition and use of 'workgroup', and add glossary entries (public issue 1). * Various minor editorial fixes (public issue 33). * Clarify locations for block members in the &lt;&lt;interfaces-iointerfaces-locations,Location Assignment>> section (public issue 45). * Editorial fixes for &lt;&lt;commandbuffer-allocation,Command Buffer Allocation>> section (public issues 54, 59). * Clarify behavior of depth test in the &lt;&lt;fragops-depth,Depth Test&gt;&gt; section (public issues 80, 81). * Remove discussion of return codes from flink:vkGetPhysicalDeviceSparseImageFormatProperties and flink:vkGetImageSparseMemoryRequirements, which don't return values (public issue 82). * Allow flink:vkCmdDrawIndirect and flink:vkCmdDrawIndexedIndirect pname:drawCount of 0, as well as 1, when the multiDrawIndirect feature is not supported (public issue 88). * Remove confusing wording in the &lt;&lt;features-limits,Limits>> section describing the slink:VkPhysicalDeviceLimits pname:minTexelBufferOffsetAlignment, pname:minUniformBufferOffsetAlignment, and pname:minStorageBufferOffsetAlignment members as both minimums and maximums (public issue 91). * Clarified that only the RGB components should be affected in places where sRGB is referred to in the spec, such as ASTC formats. Minor re-wording to avoid "color space" when actively incorrect, now that we refer to the Data Format Spec which actually makes a distinction between color space and transfer function (public issue 94). * Treat pname:pPropertyCount == 0 consistently in flink:vkEnumerateInstanceLayerProperties and flink:vkEnumerateDeviceLayerProperties (public issue 99) * Cleanup minor editorial issues in chapters 14-17 (public issue 100). * Clarify definition of flink:vkEnumerateInstanceExtensionProperties and flink:vkEnumerateDeviceExtensionProperties (public issue 101). * Define the flink:vkEnumerateInstanceExtensionProperties and flink:vkEnumerateDeviceExtensionProperties pname:pLayerName parameter to be a pointer to a null-terminated UTF-8 string (public issue 101). * Rearrange "Missing information" references in mandatory format tables (public issue 101). * Clarify that the enumerated extensions returned by flink:vkEnumerateInstanceExtensionProperties and flink:vkEnumerateDeviceExtensionProperties will only include extensions provided by the platform or extensions implemented in implicitly enabled layers (public issue 101). * Miscellaneous editorial fixes. Include the Vulkan spec patch number in the PDF title. Fix label on &lt;&lt;fig-non-strict-lines,Non strict lines>> diagram. Use more easily distinguished symbols in tables in the &lt;&lt;features-required-format-support,Required Format Support>> section. Don't require FQDNs used as layer names be encoded in lower case if not possible, in the &lt;&lt;extensions-naming-conventions, Extension and Layer Naming Conventions>> section (public issues 101, 119, 121). Internal Issues: * Fixed excessive spacing in tables in XHTML (internal issue 18). * Clarify that ename:VK_COMMAND_BUFFER_USAGE_ONE_TIME_SUBMIT_BIT applies to secondary command buffers. Previously spec only referred to the members of pname:pCommandBuffers being affected by this bit. Added a separate slink:VkSubmitInfo Valid Usage restriction specifying that ename:VK_COMMAND_BUFFER_USAGE_ONE_TIME_SUBMIT_BIT also applies to any secondary command buffers that are recorded into the primary command buffers in pname:pCommandBuffers (internal issue 106). * Clarify that slink:VkDeviceCreateInfo::pname:pEnabledFeatures can be NULL (internal issue 117). * Remove "the value of" where it is redundant (e.g. speaking of an API parameter, struct member, or SPIR-V variable, but not when speaking of color components) (internal issue 175). * Forced patch version to always be 0 in the header. Add a "VK_API_VERSION_<major>_<minor>" macro for people to use to do the right thing. Add a VK_HEADER_VERSION which captures the header release number independent of the spec patch number (internal issue 176). * Correct description of slink:VkPipelineShaderStageCreateInfo::pname:pName to "a pointer to a null-terminated UTF-8 string" (internal issue #197). Other Commits: * Updated DataFormat spec reference to the new date for revision 5 of that spec. * Fixed KEEP option (to retain LaTeX intermediate files) in the Makefile to be included when edited there, as well as set on the command line. * Reserve and add "VK_IMG_filter_cubic" to the registry, and implement script functionality to add and remove validity from existing functions. Includes schema and readme changes. * Update GL_KHR_vulkan_glsl so push_constants do not have descriptor sets.
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* pname:pLayerName is either `NULL` or a pointer to a null-terminated
UTF-8 string naming the instance layer to retrieve extensions from.
Change log for February 25, 2015 Vulkan 1.0.4 spec update: * Bump API patch number from 3 to 4 for the first public update to the spec. Add patch number to the spec title (this will be done automatically from XML, later). * Fixes for numerous editorial issues. Regularize descriptions of variable-length array queries. Properly tag enumerants so they come out in the right font (many were mislabeled in usage tags in vk.xml, or not tagged). Spelling and markup corrections (public issue 4). * Fix typos and clearly separate description of different types of memory areas (public issue 5). * Use standards-compliant preprocessor guard symbols on headers (public issue 7). * Note that Github users can't currently set labels on issues, and recommend a fallback approach (public issue 15). * Use latexmath prefix on len= attributes (public issue 29). * Make flink:vkCmdUpdateBuffer pname:dataSize limit consistent (public issue 65). * Add VK_KHR_mirror_clamp_to_edge extension to core API branch, as an optional feature not introducing new commands or enums (internal issue 104). * Cleanup invariance language inherited from the GL specification to not refer to nonexistent (GL-specific) state (internal issue 111). * Modify the flink:vkCmdDrawIndexed pname:vertexOffset definition to not be the "base offset within the index buffer" but rather the "value added to the vertex index before indexing into the vertex buffer" (internal issue 118). * Fix drawing chapter in the "Programmable Primitive Shading" section where it described categories of drawing commands. It referenced flink:vkCmdDrawIndexed twice. Replace the second reference with flink:vkCmdDrawIndexedIndirect (internal issue 119). * Typo fixed in <<sparsememory-examples-advanced,Advanced Sparse Resources>> sparse memory example (internal issue 122). * Add flink:VkDisplayPlaneAlphaFlagsKHR to <require> section of VK_KHR_display extension (internal issue 125) * Add missing optional="false,true" to flink:vkGetImageSparseMemoryRequirements pname:pSparseMemoryRequirementCount parameter (internal issue 132) * Rename ename:VK_STRUCTURE_TYPE_DEBUG_REPORT_CREATE_INFO_EXT to ename:VK_STRUCTURE_TYPE_DEBUG_REPORT_CALLBACK_CREATE_INFO_EXT (internal issue 133) * Fix a handful of broken cross-references in the <<samplers,Samplers>> chapter (internal issue 134). * Fix "Input Attachement" GLSL example to use correct syntax (internal issue 135). * Update XML schema and documentation to accomodate recently added attributes for validity. Add some introductory material describing design choices and pointing to the public repository to file issues. * Put include of validity in the core spec extensions chapter on its own line, so that asciidoc is happy. * Fix vertexOffset language to specify that it's the value added to the vertex index before indexing into the vertex buffer, not the base offset within the index buffer. * Fix error in the description of flink:vkCmdNextSubpass.
2016-02-25 06:02:34 +00:00
* pname:pPropertyCount is a pointer to an integer related to the number of
extension properties available or queried, as described below.
* pname:pProperties is either `NULL` or a pointer to an array of
slink:VkExtensionProperties structures.
include::../validity/protos/vkEnumerateInstanceExtensionProperties.txt[]
Change log for April 29, 2016 Vulkan 1.0.12 spec update: * Bump API patch number and header version number to 12 for this update. Github Issues: * Change valid usage statements intended to be "sub-points" to be actual sub-points (public issue 66). * Replace double negation in description of slink:VkRenderPassBeginInfo::pname:pClearValues (based on public merge 142). * Cleanup minor typos in spec, ref pages and XML, including those proposed in public pull requests 144, 150, 151, 167, 168, 181, and 186. * Use *strict subset* in describing the partial order of memory property types for slink:VkMemoryType, and update the style guide accordingly (public issue 190). * Fix various "a image" -> "an image" typos (public issue 191). * Note in the <<fundamentals-validusage,Valid Usage>> and <<extensions-interactions,Extension Interactions>> sections that structures defined by extensions which may be passed in structure chains using the ptext:pNext member must: include initial ptext:sType and ptext:pNext members (public issue 192). Internal Issues: * Remove duplicate language from the description of the pname:fence parameter to flink:vkQueueSubmit and improve validity language (internal issue 91). * Added documentation for "optional" attribute to XML readme.tex/pdf (internal issue 149). * Clarify the host-side data validity rules and behavior of flink:vkFlushMappedMemoryRanges and flink:vkInvalidateMappedMemoryRanges (internal issue 266). Other Commits: * Added clarification to flink:vkCmdFillBuffer regarding the use of ename:VK_WHOLE_SIZE. * Fixed and documented implementation of "validextensionstructs" attribute. in XML processing scripts and readme.tex/pdf. * Add missing validity statements to flink:vkResetEvent and flink:vkCmdResetEvent. * Fix validity for the ename:VK_FORMAT_FEATURE_SAMPLED_IMAGE_FILTER_LINEAR_BIT flag. Correct all the draw/dispatch commands to mention optimally tiled images as well as linear tiled images, and say image VIEWS instead of images. Add validity statement to flink:vkCmdBlitImage * Replace the {apiname} macro with hardcoded "Vulkan", now that we've committed to that name. * Add the VK_AMD_rasterization_order extension to vk.xml.
2016-04-29 12:53:46 +00:00
When pLayerName parameter is NULL, only extensions provided by the Vulkan
Change log for March 10, 2016 Vulkan 1.0.6 spec update: * Bump API patch number and header version number to 6 for this update. Github Issues: * Define 'invocation group' for compute and graphics shaders. Cleanup definition and use of 'workgroup', and add glossary entries (public issue 1). * Various minor editorial fixes (public issue 33). * Clarify locations for block members in the &lt;&lt;interfaces-iointerfaces-locations,Location Assignment>> section (public issue 45). * Editorial fixes for &lt;&lt;commandbuffer-allocation,Command Buffer Allocation>> section (public issues 54, 59). * Clarify behavior of depth test in the &lt;&lt;fragops-depth,Depth Test&gt;&gt; section (public issues 80, 81). * Remove discussion of return codes from flink:vkGetPhysicalDeviceSparseImageFormatProperties and flink:vkGetImageSparseMemoryRequirements, which don't return values (public issue 82). * Allow flink:vkCmdDrawIndirect and flink:vkCmdDrawIndexedIndirect pname:drawCount of 0, as well as 1, when the multiDrawIndirect feature is not supported (public issue 88). * Remove confusing wording in the &lt;&lt;features-limits,Limits>> section describing the slink:VkPhysicalDeviceLimits pname:minTexelBufferOffsetAlignment, pname:minUniformBufferOffsetAlignment, and pname:minStorageBufferOffsetAlignment members as both minimums and maximums (public issue 91). * Clarified that only the RGB components should be affected in places where sRGB is referred to in the spec, such as ASTC formats. Minor re-wording to avoid "color space" when actively incorrect, now that we refer to the Data Format Spec which actually makes a distinction between color space and transfer function (public issue 94). * Treat pname:pPropertyCount == 0 consistently in flink:vkEnumerateInstanceLayerProperties and flink:vkEnumerateDeviceLayerProperties (public issue 99) * Cleanup minor editorial issues in chapters 14-17 (public issue 100). * Clarify definition of flink:vkEnumerateInstanceExtensionProperties and flink:vkEnumerateDeviceExtensionProperties (public issue 101). * Define the flink:vkEnumerateInstanceExtensionProperties and flink:vkEnumerateDeviceExtensionProperties pname:pLayerName parameter to be a pointer to a null-terminated UTF-8 string (public issue 101). * Rearrange "Missing information" references in mandatory format tables (public issue 101). * Clarify that the enumerated extensions returned by flink:vkEnumerateInstanceExtensionProperties and flink:vkEnumerateDeviceExtensionProperties will only include extensions provided by the platform or extensions implemented in implicitly enabled layers (public issue 101). * Miscellaneous editorial fixes. Include the Vulkan spec patch number in the PDF title. Fix label on &lt;&lt;fig-non-strict-lines,Non strict lines>> diagram. Use more easily distinguished symbols in tables in the &lt;&lt;features-required-format-support,Required Format Support>> section. Don't require FQDNs used as layer names be encoded in lower case if not possible, in the &lt;&lt;extensions-naming-conventions, Extension and Layer Naming Conventions>> section (public issues 101, 119, 121). Internal Issues: * Fixed excessive spacing in tables in XHTML (internal issue 18). * Clarify that ename:VK_COMMAND_BUFFER_USAGE_ONE_TIME_SUBMIT_BIT applies to secondary command buffers. Previously spec only referred to the members of pname:pCommandBuffers being affected by this bit. Added a separate slink:VkSubmitInfo Valid Usage restriction specifying that ename:VK_COMMAND_BUFFER_USAGE_ONE_TIME_SUBMIT_BIT also applies to any secondary command buffers that are recorded into the primary command buffers in pname:pCommandBuffers (internal issue 106). * Clarify that slink:VkDeviceCreateInfo::pname:pEnabledFeatures can be NULL (internal issue 117). * Remove "the value of" where it is redundant (e.g. speaking of an API parameter, struct member, or SPIR-V variable, but not when speaking of color components) (internal issue 175). * Forced patch version to always be 0 in the header. Add a "VK_API_VERSION_<major>_<minor>" macro for people to use to do the right thing. Add a VK_HEADER_VERSION which captures the header release number independent of the spec patch number (internal issue 176). * Correct description of slink:VkPipelineShaderStageCreateInfo::pname:pName to "a pointer to a null-terminated UTF-8 string" (internal issue #197). Other Commits: * Updated DataFormat spec reference to the new date for revision 5 of that spec. * Fixed KEEP option (to retain LaTeX intermediate files) in the Makefile to be included when edited there, as well as set on the command line. * Reserve and add "VK_IMG_filter_cubic" to the registry, and implement script functionality to add and remove validity from existing functions. Includes schema and readme changes. * Update GL_KHR_vulkan_glsl so push_constants do not have descriptor sets.
2016-03-11 01:33:02 +00:00
implementation or by implicitly enabled layers are returned.
When pname:pLayerName is the name of a layer, the instance extensions
provided by that layer are returned.
2016-02-16 09:53:44 +00:00
To enable a instance extension, the name of the extension should be added to
the pname:ppEnabledExtensionNames member of slink:VkInstanceCreateInfo when
Change log for April 22, 2016 Vulkan 1.0.11 spec update: * Bump API patch number and header version number to 11 for this update. Github Issues: * Clarify the WSI extension language by switching from the fuzzier "ownership" language to more-consistent "acquire" language (public issue 117). * Clarify that memory barriers apply to all commands in the dependency chains in the flink:vkGetRenderAreaGranularity command and the <<synchronization-execution-and-memory-dependencies,Execution And Memory Dependencies>> section (public issue 132). * Clarify that a queue family is a set of queues in the <<fundamentals-execmodel,Execution Model>> section (public issue 166). * Removed requirement from valid usage language that VkPresentInfoKHR::waitSemaphoreCount must be greater than 0 (public issue 171). * Fix broken internal links, describe structures consistently, use consistent style for SPIR-V codewords, and tag normative terms that were missing asciidoc tags (public issue 183 and ancillary markup/normative language fixes). * Fix typos for slink:VkPhysicalDeviceLimits member names in slink:VkImageCreateInfo validity language (public issue 184). Internal Issues: * Document that the requested patch version number specified as part of slink:VkApplicationInfo::pname:apiVersion is ignored when creating an instance (internal issue 176). * Clarify handling of extension structs in the <<fundamentals-validusageValid Usage>> section (internal issue 254). * Update required slink:VkImageFormatProperties::pname:maxMipLevels to be limited to the maximum allowed mipmap pyramid size corresponding to the actual maximum supported size for the format (internal issue 256). * Modify the <<features-extentperimagetype,Allowed Extent Values Based On Image Type>> section so the allowed maximum extent is the maximum image dimension supported for each dimension of the type of texture being queried (internal issue 257). * Clarify in the <<spirvenv-module-validation,Validation Rules within a Module>> section that at least one of the code:LocalSize execution mode or code:WorkgroupSize decoration is required for each compute shader entry point in a shader module (internal issue 279). * Add validity rules for formats in flink:vkCmdClearColorImage and flink:vkCmdClearDepthStencilImage (internal issue 283). * Clarify that slink:VkImageFormatProperties::pname:maxResourceSize is an upper bound, and that it may not be possible to create an image anywhere near that size (internal issue 284). Other Commits: * Fix various minor markup errors reported by validation scripts. * Change copyright from Khronos Free Use License to Apache 2.0 license on relevant script/XML/header files. This does not affect the specification source copyright.
2016-04-21 08:08:38 +00:00
creating a sname:VkInstance.
2016-02-16 09:53:44 +00:00
To query the extensions available to a given physical device, call:
include::../protos/vkEnumerateDeviceExtensionProperties.txt[]
* pname:physicalDevice is the physical device that will be queried.
Change log for March 10, 2016 Vulkan 1.0.6 spec update: * Bump API patch number and header version number to 6 for this update. Github Issues: * Define 'invocation group' for compute and graphics shaders. Cleanup definition and use of 'workgroup', and add glossary entries (public issue 1). * Various minor editorial fixes (public issue 33). * Clarify locations for block members in the &lt;&lt;interfaces-iointerfaces-locations,Location Assignment>> section (public issue 45). * Editorial fixes for &lt;&lt;commandbuffer-allocation,Command Buffer Allocation>> section (public issues 54, 59). * Clarify behavior of depth test in the &lt;&lt;fragops-depth,Depth Test&gt;&gt; section (public issues 80, 81). * Remove discussion of return codes from flink:vkGetPhysicalDeviceSparseImageFormatProperties and flink:vkGetImageSparseMemoryRequirements, which don't return values (public issue 82). * Allow flink:vkCmdDrawIndirect and flink:vkCmdDrawIndexedIndirect pname:drawCount of 0, as well as 1, when the multiDrawIndirect feature is not supported (public issue 88). * Remove confusing wording in the &lt;&lt;features-limits,Limits>> section describing the slink:VkPhysicalDeviceLimits pname:minTexelBufferOffsetAlignment, pname:minUniformBufferOffsetAlignment, and pname:minStorageBufferOffsetAlignment members as both minimums and maximums (public issue 91). * Clarified that only the RGB components should be affected in places where sRGB is referred to in the spec, such as ASTC formats. Minor re-wording to avoid "color space" when actively incorrect, now that we refer to the Data Format Spec which actually makes a distinction between color space and transfer function (public issue 94). * Treat pname:pPropertyCount == 0 consistently in flink:vkEnumerateInstanceLayerProperties and flink:vkEnumerateDeviceLayerProperties (public issue 99) * Cleanup minor editorial issues in chapters 14-17 (public issue 100). * Clarify definition of flink:vkEnumerateInstanceExtensionProperties and flink:vkEnumerateDeviceExtensionProperties (public issue 101). * Define the flink:vkEnumerateInstanceExtensionProperties and flink:vkEnumerateDeviceExtensionProperties pname:pLayerName parameter to be a pointer to a null-terminated UTF-8 string (public issue 101). * Rearrange "Missing information" references in mandatory format tables (public issue 101). * Clarify that the enumerated extensions returned by flink:vkEnumerateInstanceExtensionProperties and flink:vkEnumerateDeviceExtensionProperties will only include extensions provided by the platform or extensions implemented in implicitly enabled layers (public issue 101). * Miscellaneous editorial fixes. Include the Vulkan spec patch number in the PDF title. Fix label on &lt;&lt;fig-non-strict-lines,Non strict lines>> diagram. Use more easily distinguished symbols in tables in the &lt;&lt;features-required-format-support,Required Format Support>> section. Don't require FQDNs used as layer names be encoded in lower case if not possible, in the &lt;&lt;extensions-naming-conventions, Extension and Layer Naming Conventions>> section (public issues 101, 119, 121). Internal Issues: * Fixed excessive spacing in tables in XHTML (internal issue 18). * Clarify that ename:VK_COMMAND_BUFFER_USAGE_ONE_TIME_SUBMIT_BIT applies to secondary command buffers. Previously spec only referred to the members of pname:pCommandBuffers being affected by this bit. Added a separate slink:VkSubmitInfo Valid Usage restriction specifying that ename:VK_COMMAND_BUFFER_USAGE_ONE_TIME_SUBMIT_BIT also applies to any secondary command buffers that are recorded into the primary command buffers in pname:pCommandBuffers (internal issue 106). * Clarify that slink:VkDeviceCreateInfo::pname:pEnabledFeatures can be NULL (internal issue 117). * Remove "the value of" where it is redundant (e.g. speaking of an API parameter, struct member, or SPIR-V variable, but not when speaking of color components) (internal issue 175). * Forced patch version to always be 0 in the header. Add a "VK_API_VERSION_<major>_<minor>" macro for people to use to do the right thing. Add a VK_HEADER_VERSION which captures the header release number independent of the spec patch number (internal issue 176). * Correct description of slink:VkPipelineShaderStageCreateInfo::pname:pName to "a pointer to a null-terminated UTF-8 string" (internal issue #197). Other Commits: * Updated DataFormat spec reference to the new date for revision 5 of that spec. * Fixed KEEP option (to retain LaTeX intermediate files) in the Makefile to be included when edited there, as well as set on the command line. * Reserve and add "VK_IMG_filter_cubic" to the registry, and implement script functionality to add and remove validity from existing functions. Includes schema and readme changes. * Update GL_KHR_vulkan_glsl so push_constants do not have descriptor sets.
2016-03-11 01:33:02 +00:00
* pname:pLayerName is either `NULL` or a pointer to a null-terminated
UTF-8 string naming the device layer to retrieve extensions from.
Change log for February 25, 2015 Vulkan 1.0.4 spec update: * Bump API patch number from 3 to 4 for the first public update to the spec. Add patch number to the spec title (this will be done automatically from XML, later). * Fixes for numerous editorial issues. Regularize descriptions of variable-length array queries. Properly tag enumerants so they come out in the right font (many were mislabeled in usage tags in vk.xml, or not tagged). Spelling and markup corrections (public issue 4). * Fix typos and clearly separate description of different types of memory areas (public issue 5). * Use standards-compliant preprocessor guard symbols on headers (public issue 7). * Note that Github users can't currently set labels on issues, and recommend a fallback approach (public issue 15). * Use latexmath prefix on len= attributes (public issue 29). * Make flink:vkCmdUpdateBuffer pname:dataSize limit consistent (public issue 65). * Add VK_KHR_mirror_clamp_to_edge extension to core API branch, as an optional feature not introducing new commands or enums (internal issue 104). * Cleanup invariance language inherited from the GL specification to not refer to nonexistent (GL-specific) state (internal issue 111). * Modify the flink:vkCmdDrawIndexed pname:vertexOffset definition to not be the "base offset within the index buffer" but rather the "value added to the vertex index before indexing into the vertex buffer" (internal issue 118). * Fix drawing chapter in the "Programmable Primitive Shading" section where it described categories of drawing commands. It referenced flink:vkCmdDrawIndexed twice. Replace the second reference with flink:vkCmdDrawIndexedIndirect (internal issue 119). * Typo fixed in <<sparsememory-examples-advanced,Advanced Sparse Resources>> sparse memory example (internal issue 122). * Add flink:VkDisplayPlaneAlphaFlagsKHR to <require> section of VK_KHR_display extension (internal issue 125) * Add missing optional="false,true" to flink:vkGetImageSparseMemoryRequirements pname:pSparseMemoryRequirementCount parameter (internal issue 132) * Rename ename:VK_STRUCTURE_TYPE_DEBUG_REPORT_CREATE_INFO_EXT to ename:VK_STRUCTURE_TYPE_DEBUG_REPORT_CALLBACK_CREATE_INFO_EXT (internal issue 133) * Fix a handful of broken cross-references in the <<samplers,Samplers>> chapter (internal issue 134). * Fix "Input Attachement" GLSL example to use correct syntax (internal issue 135). * Update XML schema and documentation to accomodate recently added attributes for validity. Add some introductory material describing design choices and pointing to the public repository to file issues. * Put include of validity in the core spec extensions chapter on its own line, so that asciidoc is happy. * Fix vertexOffset language to specify that it's the value added to the vertex index before indexing into the vertex buffer, not the base offset within the index buffer. * Fix error in the description of flink:vkCmdNextSubpass.
2016-02-25 06:02:34 +00:00
* pname:pPropertyCount is a pointer to an integer related to the number of
extension properties available or queried, as described below.
* pname:pProperties is either `NULL` or a pointer to an array of
slink:VkExtensionProperties structures.
2016-02-16 09:53:44 +00:00
include::../validity/protos/vkEnumerateDeviceExtensionProperties.txt[]
Change log for April 29, 2016 Vulkan 1.0.12 spec update: * Bump API patch number and header version number to 12 for this update. Github Issues: * Change valid usage statements intended to be "sub-points" to be actual sub-points (public issue 66). * Replace double negation in description of slink:VkRenderPassBeginInfo::pname:pClearValues (based on public merge 142). * Cleanup minor typos in spec, ref pages and XML, including those proposed in public pull requests 144, 150, 151, 167, 168, 181, and 186. * Use *strict subset* in describing the partial order of memory property types for slink:VkMemoryType, and update the style guide accordingly (public issue 190). * Fix various "a image" -> "an image" typos (public issue 191). * Note in the <<fundamentals-validusage,Valid Usage>> and <<extensions-interactions,Extension Interactions>> sections that structures defined by extensions which may be passed in structure chains using the ptext:pNext member must: include initial ptext:sType and ptext:pNext members (public issue 192). Internal Issues: * Remove duplicate language from the description of the pname:fence parameter to flink:vkQueueSubmit and improve validity language (internal issue 91). * Added documentation for "optional" attribute to XML readme.tex/pdf (internal issue 149). * Clarify the host-side data validity rules and behavior of flink:vkFlushMappedMemoryRanges and flink:vkInvalidateMappedMemoryRanges (internal issue 266). Other Commits: * Added clarification to flink:vkCmdFillBuffer regarding the use of ename:VK_WHOLE_SIZE. * Fixed and documented implementation of "validextensionstructs" attribute. in XML processing scripts and readme.tex/pdf. * Add missing validity statements to flink:vkResetEvent and flink:vkCmdResetEvent. * Fix validity for the ename:VK_FORMAT_FEATURE_SAMPLED_IMAGE_FILTER_LINEAR_BIT flag. Correct all the draw/dispatch commands to mention optimally tiled images as well as linear tiled images, and say image VIEWS instead of images. Add validity statement to flink:vkCmdBlitImage * Replace the {apiname} macro with hardcoded "Vulkan", now that we've committed to that name. * Add the VK_AMD_rasterization_order extension to vk.xml.
2016-04-29 12:53:46 +00:00
When pLayerName parameter is NULL, only extensions provided by the Vulkan
Change log for March 10, 2016 Vulkan 1.0.6 spec update: * Bump API patch number and header version number to 6 for this update. Github Issues: * Define 'invocation group' for compute and graphics shaders. Cleanup definition and use of 'workgroup', and add glossary entries (public issue 1). * Various minor editorial fixes (public issue 33). * Clarify locations for block members in the &lt;&lt;interfaces-iointerfaces-locations,Location Assignment>> section (public issue 45). * Editorial fixes for &lt;&lt;commandbuffer-allocation,Command Buffer Allocation>> section (public issues 54, 59). * Clarify behavior of depth test in the &lt;&lt;fragops-depth,Depth Test&gt;&gt; section (public issues 80, 81). * Remove discussion of return codes from flink:vkGetPhysicalDeviceSparseImageFormatProperties and flink:vkGetImageSparseMemoryRequirements, which don't return values (public issue 82). * Allow flink:vkCmdDrawIndirect and flink:vkCmdDrawIndexedIndirect pname:drawCount of 0, as well as 1, when the multiDrawIndirect feature is not supported (public issue 88). * Remove confusing wording in the &lt;&lt;features-limits,Limits>> section describing the slink:VkPhysicalDeviceLimits pname:minTexelBufferOffsetAlignment, pname:minUniformBufferOffsetAlignment, and pname:minStorageBufferOffsetAlignment members as both minimums and maximums (public issue 91). * Clarified that only the RGB components should be affected in places where sRGB is referred to in the spec, such as ASTC formats. Minor re-wording to avoid "color space" when actively incorrect, now that we refer to the Data Format Spec which actually makes a distinction between color space and transfer function (public issue 94). * Treat pname:pPropertyCount == 0 consistently in flink:vkEnumerateInstanceLayerProperties and flink:vkEnumerateDeviceLayerProperties (public issue 99) * Cleanup minor editorial issues in chapters 14-17 (public issue 100). * Clarify definition of flink:vkEnumerateInstanceExtensionProperties and flink:vkEnumerateDeviceExtensionProperties (public issue 101). * Define the flink:vkEnumerateInstanceExtensionProperties and flink:vkEnumerateDeviceExtensionProperties pname:pLayerName parameter to be a pointer to a null-terminated UTF-8 string (public issue 101). * Rearrange "Missing information" references in mandatory format tables (public issue 101). * Clarify that the enumerated extensions returned by flink:vkEnumerateInstanceExtensionProperties and flink:vkEnumerateDeviceExtensionProperties will only include extensions provided by the platform or extensions implemented in implicitly enabled layers (public issue 101). * Miscellaneous editorial fixes. Include the Vulkan spec patch number in the PDF title. Fix label on &lt;&lt;fig-non-strict-lines,Non strict lines>> diagram. Use more easily distinguished symbols in tables in the &lt;&lt;features-required-format-support,Required Format Support>> section. Don't require FQDNs used as layer names be encoded in lower case if not possible, in the &lt;&lt;extensions-naming-conventions, Extension and Layer Naming Conventions>> section (public issues 101, 119, 121). Internal Issues: * Fixed excessive spacing in tables in XHTML (internal issue 18). * Clarify that ename:VK_COMMAND_BUFFER_USAGE_ONE_TIME_SUBMIT_BIT applies to secondary command buffers. Previously spec only referred to the members of pname:pCommandBuffers being affected by this bit. Added a separate slink:VkSubmitInfo Valid Usage restriction specifying that ename:VK_COMMAND_BUFFER_USAGE_ONE_TIME_SUBMIT_BIT also applies to any secondary command buffers that are recorded into the primary command buffers in pname:pCommandBuffers (internal issue 106). * Clarify that slink:VkDeviceCreateInfo::pname:pEnabledFeatures can be NULL (internal issue 117). * Remove "the value of" where it is redundant (e.g. speaking of an API parameter, struct member, or SPIR-V variable, but not when speaking of color components) (internal issue 175). * Forced patch version to always be 0 in the header. Add a "VK_API_VERSION_<major>_<minor>" macro for people to use to do the right thing. Add a VK_HEADER_VERSION which captures the header release number independent of the spec patch number (internal issue 176). * Correct description of slink:VkPipelineShaderStageCreateInfo::pname:pName to "a pointer to a null-terminated UTF-8 string" (internal issue #197). Other Commits: * Updated DataFormat spec reference to the new date for revision 5 of that spec. * Fixed KEEP option (to retain LaTeX intermediate files) in the Makefile to be included when edited there, as well as set on the command line. * Reserve and add "VK_IMG_filter_cubic" to the registry, and implement script functionality to add and remove validity from existing functions. Includes schema and readme changes. * Update GL_KHR_vulkan_glsl so push_constants do not have descriptor sets.
2016-03-11 01:33:02 +00:00
implementation or by implicitly enabled layers are returned.
When pname:pLayerName is the name of a layer, the device extensions
provided by that layer are returned.
2016-02-16 09:53:44 +00:00
To enable a device layer, the name of the layer should be added to the
pname:ppEnabledExtensionNames member of slink:VkDeviceCreateInfo when
Change log for April 22, 2016 Vulkan 1.0.11 spec update: * Bump API patch number and header version number to 11 for this update. Github Issues: * Clarify the WSI extension language by switching from the fuzzier "ownership" language to more-consistent "acquire" language (public issue 117). * Clarify that memory barriers apply to all commands in the dependency chains in the flink:vkGetRenderAreaGranularity command and the <<synchronization-execution-and-memory-dependencies,Execution And Memory Dependencies>> section (public issue 132). * Clarify that a queue family is a set of queues in the <<fundamentals-execmodel,Execution Model>> section (public issue 166). * Removed requirement from valid usage language that VkPresentInfoKHR::waitSemaphoreCount must be greater than 0 (public issue 171). * Fix broken internal links, describe structures consistently, use consistent style for SPIR-V codewords, and tag normative terms that were missing asciidoc tags (public issue 183 and ancillary markup/normative language fixes). * Fix typos for slink:VkPhysicalDeviceLimits member names in slink:VkImageCreateInfo validity language (public issue 184). Internal Issues: * Document that the requested patch version number specified as part of slink:VkApplicationInfo::pname:apiVersion is ignored when creating an instance (internal issue 176). * Clarify handling of extension structs in the <<fundamentals-validusageValid Usage>> section (internal issue 254). * Update required slink:VkImageFormatProperties::pname:maxMipLevels to be limited to the maximum allowed mipmap pyramid size corresponding to the actual maximum supported size for the format (internal issue 256). * Modify the <<features-extentperimagetype,Allowed Extent Values Based On Image Type>> section so the allowed maximum extent is the maximum image dimension supported for each dimension of the type of texture being queried (internal issue 257). * Clarify in the <<spirvenv-module-validation,Validation Rules within a Module>> section that at least one of the code:LocalSize execution mode or code:WorkgroupSize decoration is required for each compute shader entry point in a shader module (internal issue 279). * Add validity rules for formats in flink:vkCmdClearColorImage and flink:vkCmdClearDepthStencilImage (internal issue 283). * Clarify that slink:VkImageFormatProperties::pname:maxResourceSize is an upper bound, and that it may not be possible to create an image anywhere near that size (internal issue 284). Other Commits: * Fix various minor markup errors reported by validation scripts. * Change copyright from Khronos Free Use License to Apache 2.0 license on relevant script/XML/header files. This does not affect the specification source copyright.
2016-04-21 08:08:38 +00:00
creating a sname:VkDevice.
2016-02-16 09:53:44 +00:00
Change log for February 25, 2015 Vulkan 1.0.4 spec update: * Bump API patch number from 3 to 4 for the first public update to the spec. Add patch number to the spec title (this will be done automatically from XML, later). * Fixes for numerous editorial issues. Regularize descriptions of variable-length array queries. Properly tag enumerants so they come out in the right font (many were mislabeled in usage tags in vk.xml, or not tagged). Spelling and markup corrections (public issue 4). * Fix typos and clearly separate description of different types of memory areas (public issue 5). * Use standards-compliant preprocessor guard symbols on headers (public issue 7). * Note that Github users can't currently set labels on issues, and recommend a fallback approach (public issue 15). * Use latexmath prefix on len= attributes (public issue 29). * Make flink:vkCmdUpdateBuffer pname:dataSize limit consistent (public issue 65). * Add VK_KHR_mirror_clamp_to_edge extension to core API branch, as an optional feature not introducing new commands or enums (internal issue 104). * Cleanup invariance language inherited from the GL specification to not refer to nonexistent (GL-specific) state (internal issue 111). * Modify the flink:vkCmdDrawIndexed pname:vertexOffset definition to not be the "base offset within the index buffer" but rather the "value added to the vertex index before indexing into the vertex buffer" (internal issue 118). * Fix drawing chapter in the "Programmable Primitive Shading" section where it described categories of drawing commands. It referenced flink:vkCmdDrawIndexed twice. Replace the second reference with flink:vkCmdDrawIndexedIndirect (internal issue 119). * Typo fixed in <<sparsememory-examples-advanced,Advanced Sparse Resources>> sparse memory example (internal issue 122). * Add flink:VkDisplayPlaneAlphaFlagsKHR to <require> section of VK_KHR_display extension (internal issue 125) * Add missing optional="false,true" to flink:vkGetImageSparseMemoryRequirements pname:pSparseMemoryRequirementCount parameter (internal issue 132) * Rename ename:VK_STRUCTURE_TYPE_DEBUG_REPORT_CREATE_INFO_EXT to ename:VK_STRUCTURE_TYPE_DEBUG_REPORT_CALLBACK_CREATE_INFO_EXT (internal issue 133) * Fix a handful of broken cross-references in the <<samplers,Samplers>> chapter (internal issue 134). * Fix "Input Attachement" GLSL example to use correct syntax (internal issue 135). * Update XML schema and documentation to accomodate recently added attributes for validity. Add some introductory material describing design choices and pointing to the public repository to file issues. * Put include of validity in the core spec extensions chapter on its own line, so that asciidoc is happy. * Fix vertexOffset language to specify that it's the value added to the vertex index before indexing into the vertex buffer, not the base offset within the index buffer. * Fix error in the description of flink:vkCmdNextSubpass.
2016-02-25 06:02:34 +00:00
For both flink:vkEnumerateInstanceExtensionProperties and
flink:vkEnumerateDeviceExtensionProperties, if pname:pProperties is `NULL`,
then the number of extensions properties available is returned in
pname:pPropertyCount. Otherwise, pname:pPropertyCount must: point to a
variable set by the user to the number of elements in the pname:pProperties
array, and on return the variable is overwritten with the number of
Change log for March 10, 2016 Vulkan 1.0.6 spec update: * Bump API patch number and header version number to 6 for this update. Github Issues: * Define 'invocation group' for compute and graphics shaders. Cleanup definition and use of 'workgroup', and add glossary entries (public issue 1). * Various minor editorial fixes (public issue 33). * Clarify locations for block members in the &lt;&lt;interfaces-iointerfaces-locations,Location Assignment>> section (public issue 45). * Editorial fixes for &lt;&lt;commandbuffer-allocation,Command Buffer Allocation>> section (public issues 54, 59). * Clarify behavior of depth test in the &lt;&lt;fragops-depth,Depth Test&gt;&gt; section (public issues 80, 81). * Remove discussion of return codes from flink:vkGetPhysicalDeviceSparseImageFormatProperties and flink:vkGetImageSparseMemoryRequirements, which don't return values (public issue 82). * Allow flink:vkCmdDrawIndirect and flink:vkCmdDrawIndexedIndirect pname:drawCount of 0, as well as 1, when the multiDrawIndirect feature is not supported (public issue 88). * Remove confusing wording in the &lt;&lt;features-limits,Limits>> section describing the slink:VkPhysicalDeviceLimits pname:minTexelBufferOffsetAlignment, pname:minUniformBufferOffsetAlignment, and pname:minStorageBufferOffsetAlignment members as both minimums and maximums (public issue 91). * Clarified that only the RGB components should be affected in places where sRGB is referred to in the spec, such as ASTC formats. Minor re-wording to avoid "color space" when actively incorrect, now that we refer to the Data Format Spec which actually makes a distinction between color space and transfer function (public issue 94). * Treat pname:pPropertyCount == 0 consistently in flink:vkEnumerateInstanceLayerProperties and flink:vkEnumerateDeviceLayerProperties (public issue 99) * Cleanup minor editorial issues in chapters 14-17 (public issue 100). * Clarify definition of flink:vkEnumerateInstanceExtensionProperties and flink:vkEnumerateDeviceExtensionProperties (public issue 101). * Define the flink:vkEnumerateInstanceExtensionProperties and flink:vkEnumerateDeviceExtensionProperties pname:pLayerName parameter to be a pointer to a null-terminated UTF-8 string (public issue 101). * Rearrange "Missing information" references in mandatory format tables (public issue 101). * Clarify that the enumerated extensions returned by flink:vkEnumerateInstanceExtensionProperties and flink:vkEnumerateDeviceExtensionProperties will only include extensions provided by the platform or extensions implemented in implicitly enabled layers (public issue 101). * Miscellaneous editorial fixes. Include the Vulkan spec patch number in the PDF title. Fix label on &lt;&lt;fig-non-strict-lines,Non strict lines>> diagram. Use more easily distinguished symbols in tables in the &lt;&lt;features-required-format-support,Required Format Support>> section. Don't require FQDNs used as layer names be encoded in lower case if not possible, in the &lt;&lt;extensions-naming-conventions, Extension and Layer Naming Conventions>> section (public issues 101, 119, 121). Internal Issues: * Fixed excessive spacing in tables in XHTML (internal issue 18). * Clarify that ename:VK_COMMAND_BUFFER_USAGE_ONE_TIME_SUBMIT_BIT applies to secondary command buffers. Previously spec only referred to the members of pname:pCommandBuffers being affected by this bit. Added a separate slink:VkSubmitInfo Valid Usage restriction specifying that ename:VK_COMMAND_BUFFER_USAGE_ONE_TIME_SUBMIT_BIT also applies to any secondary command buffers that are recorded into the primary command buffers in pname:pCommandBuffers (internal issue 106). * Clarify that slink:VkDeviceCreateInfo::pname:pEnabledFeatures can be NULL (internal issue 117). * Remove "the value of" where it is redundant (e.g. speaking of an API parameter, struct member, or SPIR-V variable, but not when speaking of color components) (internal issue 175). * Forced patch version to always be 0 in the header. Add a "VK_API_VERSION_<major>_<minor>" macro for people to use to do the right thing. Add a VK_HEADER_VERSION which captures the header release number independent of the spec patch number (internal issue 176). * Correct description of slink:VkPipelineShaderStageCreateInfo::pname:pName to "a pointer to a null-terminated UTF-8 string" (internal issue #197). Other Commits: * Updated DataFormat spec reference to the new date for revision 5 of that spec. * Fixed KEEP option (to retain LaTeX intermediate files) in the Makefile to be included when edited there, as well as set on the command line. * Reserve and add "VK_IMG_filter_cubic" to the registry, and implement script functionality to add and remove validity from existing functions. Includes schema and readme changes. * Update GL_KHR_vulkan_glsl so push_constants do not have descriptor sets.
2016-03-11 01:33:02 +00:00
structures actually written to pname:pProperties. If
Change log for February 25, 2015 Vulkan 1.0.4 spec update: * Bump API patch number from 3 to 4 for the first public update to the spec. Add patch number to the spec title (this will be done automatically from XML, later). * Fixes for numerous editorial issues. Regularize descriptions of variable-length array queries. Properly tag enumerants so they come out in the right font (many were mislabeled in usage tags in vk.xml, or not tagged). Spelling and markup corrections (public issue 4). * Fix typos and clearly separate description of different types of memory areas (public issue 5). * Use standards-compliant preprocessor guard symbols on headers (public issue 7). * Note that Github users can't currently set labels on issues, and recommend a fallback approach (public issue 15). * Use latexmath prefix on len= attributes (public issue 29). * Make flink:vkCmdUpdateBuffer pname:dataSize limit consistent (public issue 65). * Add VK_KHR_mirror_clamp_to_edge extension to core API branch, as an optional feature not introducing new commands or enums (internal issue 104). * Cleanup invariance language inherited from the GL specification to not refer to nonexistent (GL-specific) state (internal issue 111). * Modify the flink:vkCmdDrawIndexed pname:vertexOffset definition to not be the "base offset within the index buffer" but rather the "value added to the vertex index before indexing into the vertex buffer" (internal issue 118). * Fix drawing chapter in the "Programmable Primitive Shading" section where it described categories of drawing commands. It referenced flink:vkCmdDrawIndexed twice. Replace the second reference with flink:vkCmdDrawIndexedIndirect (internal issue 119). * Typo fixed in <<sparsememory-examples-advanced,Advanced Sparse Resources>> sparse memory example (internal issue 122). * Add flink:VkDisplayPlaneAlphaFlagsKHR to <require> section of VK_KHR_display extension (internal issue 125) * Add missing optional="false,true" to flink:vkGetImageSparseMemoryRequirements pname:pSparseMemoryRequirementCount parameter (internal issue 132) * Rename ename:VK_STRUCTURE_TYPE_DEBUG_REPORT_CREATE_INFO_EXT to ename:VK_STRUCTURE_TYPE_DEBUG_REPORT_CALLBACK_CREATE_INFO_EXT (internal issue 133) * Fix a handful of broken cross-references in the <<samplers,Samplers>> chapter (internal issue 134). * Fix "Input Attachement" GLSL example to use correct syntax (internal issue 135). * Update XML schema and documentation to accomodate recently added attributes for validity. Add some introductory material describing design choices and pointing to the public repository to file issues. * Put include of validity in the core spec extensions chapter on its own line, so that asciidoc is happy. * Fix vertexOffset language to specify that it's the value added to the vertex index before indexing into the vertex buffer, not the base offset within the index buffer. * Fix error in the description of flink:vkCmdNextSubpass.
2016-02-25 06:02:34 +00:00
pname:pPropertyCount is less than the number of extension properties
available, at most pname:pPropertyCount structures will be written. If
pname:pPropertyCount is smaller than the number of extensions available,
ename:VK_INCOMPLETE will be returned instead of ename:VK_SUCCESS, to
indicate that not all the available properties were returned.
2016-02-16 09:53:44 +00:00
Change log for April 22, 2016 Vulkan 1.0.11 spec update: * Bump API patch number and header version number to 11 for this update. Github Issues: * Clarify the WSI extension language by switching from the fuzzier "ownership" language to more-consistent "acquire" language (public issue 117). * Clarify that memory barriers apply to all commands in the dependency chains in the flink:vkGetRenderAreaGranularity command and the <<synchronization-execution-and-memory-dependencies,Execution And Memory Dependencies>> section (public issue 132). * Clarify that a queue family is a set of queues in the <<fundamentals-execmodel,Execution Model>> section (public issue 166). * Removed requirement from valid usage language that VkPresentInfoKHR::waitSemaphoreCount must be greater than 0 (public issue 171). * Fix broken internal links, describe structures consistently, use consistent style for SPIR-V codewords, and tag normative terms that were missing asciidoc tags (public issue 183 and ancillary markup/normative language fixes). * Fix typos for slink:VkPhysicalDeviceLimits member names in slink:VkImageCreateInfo validity language (public issue 184). Internal Issues: * Document that the requested patch version number specified as part of slink:VkApplicationInfo::pname:apiVersion is ignored when creating an instance (internal issue 176). * Clarify handling of extension structs in the <<fundamentals-validusageValid Usage>> section (internal issue 254). * Update required slink:VkImageFormatProperties::pname:maxMipLevels to be limited to the maximum allowed mipmap pyramid size corresponding to the actual maximum supported size for the format (internal issue 256). * Modify the <<features-extentperimagetype,Allowed Extent Values Based On Image Type>> section so the allowed maximum extent is the maximum image dimension supported for each dimension of the type of texture being queried (internal issue 257). * Clarify in the <<spirvenv-module-validation,Validation Rules within a Module>> section that at least one of the code:LocalSize execution mode or code:WorkgroupSize decoration is required for each compute shader entry point in a shader module (internal issue 279). * Add validity rules for formats in flink:vkCmdClearColorImage and flink:vkCmdClearDepthStencilImage (internal issue 283). * Clarify that slink:VkImageFormatProperties::pname:maxResourceSize is an upper bound, and that it may not be possible to create an image anywhere near that size (internal issue 284). Other Commits: * Fix various minor markup errors reported by validation scripts. * Change copyright from Khronos Free Use License to Apache 2.0 license on relevant script/XML/header files. This does not affect the specification source copyright.
2016-04-21 08:08:38 +00:00
The sname:VkExtensionProperties structure is defined as:
2016-02-16 09:53:44 +00:00
include::../structs/VkExtensionProperties.txt[]
* pname:extensionName is a null-terminated string specifying the name of
the extension.
* pname:specVersion is the version of this extension. It is an integer,
incremented with backward compatible changes.
include::../validity/structs/VkExtensionProperties.txt[]