Vulkan-Docs/doc/specs/vulkan/man/vkCmdBindDescriptorSets.txt

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// Copyright (c) 2014-2016 Khronos Group. This work is licensed under a
// Creative Commons Attribution 4.0 International License; see
// http://creativecommons.org/licenses/by/4.0/
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vkCmdBindDescriptorSets(3)
==========================
Name
----
vkCmdBindDescriptorSets - Binds descriptor sets to a command buffer.
C Specification
---------------
// refBegin vkCmdBindDescriptorSets Binds descriptor sets to a command buffer.
To bind one or more descriptor sets to a command buffer, call:
Change log for July 22, 2016 Vulkan 1.0.22 spec update: * Bump API patch number and header version number to 22 for this update. Github Issues: * Translate the subpass self-dependency language into concrete validity statements, and added a validity statement about the restrictions on layout parameters (public issue 267). * Add validity requirement that slink:VkAttachmentDescription::pname:finalLayout and slink:VkAttachmentReference::pname:layout must not be ename:VK_IMAGE_LAYOUT_UNDEFINED or ename:VK_IMAGE_LAYOUT_PREINITIALIZED (public issue 268). * Clarify that slink:VkSubpassDescription::pname:pResolveAttachments layouts are used. Make language consistent with other attachment arrays (public issue 270). * Changed 64-bit definition for dname:VK_DEFINE_NON_DISPATCHABLE_HANDLE to work for x32 platform in +vk.xml+ and the resulting +vulkan.h+ (public issue 282). * Add missing error return code for flink:vkEnumerateInstanceExtensionProperties and flink:vkEnumerateDeviceExtensionProperties (public issue 285) * Fix several cases of stext::VkStructName.memberName markup to stext::VkStructName::pname:memberName, to match other usage in the spec, and describe this markup in the style guide (public issue 286). * Modified validity language generation script to avoid redundant common ancestor language if covered by generic parent language, and used `Both' instead of `Each' when appropriate (public issue 288). Internal Issues: * Add language about behavior of flink:vkAllocateDescriptorSets when allocation fails due to fragmentation, a new error ename:VK_ERROR_FRAGMENTED_POOL, and a Note explaining the situation (internal issue 309). * For the features of code:PointSize, code:ClipDistance, and code:CullDistance, the SPIR-V capability is required to be declared on use (read or write) rather than on decoration (internal issue 359). * Have desktop versions of GLSL respect precision qualification (code:mediump and code:lowp) when compiling for Vulkan. These will get translated to SPIR-V's code:RelaxedPrecision decoration as they do with OpenGL ES versions of GLSL (ESSL). The default precision of all types is code:highp when using a desktop version (internal issue 360). * Add validity statement for slink:VkImageCreateInfo specifying that multisampled images must be two-dimensional, optimally tiled, and with a single mipmap level (internal issue 369). * Add validity statements to slink:VkImageViewCreateInfo disallowing creation of images or image views with no supported features. Made some slink:VkImageViewCreateInfo validity statements more precise and consistent. Added a Note to the <<features,features>> chapter about formats with no features (internal issue 371). * Remove +manpages+ from default build targets. Nroff outputs containing imbedded latexmath will not render properly. Fixing this is a lot of work for limited use cases (internal issue 401). Other Commits: * Fix flink:vkRenderPassBeginInfo::pname:clearValueCount validity statement to be based on attachment indices rather than the number of cleared attachments (Vulkan-LoaderAndValidationLayers/issues/601). * Convert registry documentation from LaTeX to asciidoc source and rename from +src/spec/readme.tex+ to +src/spec/registry.txt+. * Fix lack of Oxford commas in validity language. * Lots of cleanup of generator scripts and Makefiles to move extension list for generator into the script arguments instead of the body of genvk.py, and express better dependencies between XML, scripts, and generated files.
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include::../api/protos/vkCmdBindDescriptorSets.txt[]
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Parameters
----------
* pname:commandBuffer is the command buffer that the descriptor sets will
be bound to.
* pname:pipelineBindPoint is a elink:VkPipelineBindPoint indicating
whether the descriptors will be used by graphics pipelines or compute
pipelines. There is a separate set of bind points for each of graphics
and compute, so binding one does not disturb the other.
* pname:layout is a sname:VkPipelineLayout object used to program the
bindings.
* pname:firstSet is the set number of the first descriptor set to be
bound.
* pname:descriptorSetCount is the number of elements in the
pname:pDescriptorSets array.
* pname:pDescriptorSets is an array of handles to sname:VkDescriptorSet
objects describing the descriptor sets to write to.
* pname:dynamicOffsetCount is the number of dynamic offsets
in the pname:pDynamicOffsets array.
* pname:pDynamicOffsets is a pointer to an array of basetype:uint32_t
values specifying dynamic offsets.
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Description
-----------
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fname:vkCmdBindDescriptorSets causes the sets numbered [pname:firstSet..
pname:firstSet+pname:descriptorSetCount-1] to use the bindings stored in
pname:pDescriptorSets[0..pname:descriptorSetCount-1] for subsequent
rendering commands (either compute or graphics, according to the
pname:pipelineBindPoint). Any bindings that were previously applied via
these sets are no longer valid.
Once bound, a descriptor set affects rendering of subsequent graphics or
compute commands in the command buffer until a different set is bound to the
same set number, or else until the set is disturbed as described in
<<descriptorsets-compatibility, Pipeline Layout Compatibility>>.
A compatible descriptor set must: be bound for all set numbers that any
shaders in a pipeline access, at the time that a draw or dispatch command is
recorded to execute using that pipeline. However, if none of the shaders in
a pipeline statically use any bindings with a particular set number, then no
descriptor set need be bound for that set number, even if the pipeline
layout includes a non-trivial descriptor set layout for that set number.
If any of the sets being bound include dynamic uniform or storage buffers,
then pname:pDynamicOffsets includes one element for each array element
in each dynamic descriptor type binding in each set. Values are taken from
pname:pDynamicOffsets in an order such that all entries for set N come
before set N+1; within a set, entries are ordered by the binding numbers in
the descriptor set layouts; and within a binding array, elements are in
order. pname:dynamicOffsetCount must: equal the total number of dynamic
descriptors in the sets being bound.
The effective offset used for dynamic uniform and storage buffer bindings is
the sum of the relative offset taken from pname:pDynamicOffsets, and the
base address of the buffer plus base offset in the descriptor set. The
length of the dynamic uniform and storage buffer bindings is the buffer
range as specified in the descriptor set.
Each of the pname:pDescriptorSets must: be compatible with the pipeline
layout specified by pname:layout. The layout used to program the bindings
must: also be compatible with the pipeline used in subsequent graphics or
compute commands, as defined in the <<descriptorsets-compatibility, Pipeline
Layout Compatibility>> section.
The descriptor set contents bound by a call to fname:vkCmdBindDescriptorSets
may: be consumed during host execution of the command, or during
shader execution of the resulting draws, or any time in between. Thus, the
contents mustnot: be altered (overwritten by an update command, or freed)
between when the command is recorded and when the command completes
executing on the queue. The contents of pname:pDynamicOffsets are consumed
immediately during execution of fname:vkCmdBindDescriptorSets. Once all
pending uses have completed, it is legal to update and reuse a descriptor
set.
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include::../validity/protos/vkCmdBindDescriptorSets.txt[]
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See Also
--------
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slink:VkCommandBuffer, slink:VkDescriptorSet, elink:VkPipelineBindPoint, slink:VkPipelineLayout
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Document Notes
--------------
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For more information, see the Vulkan Specification at URL
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https://www.khronos.org/registry/vulkan/specs/1.0/xhtml/vkspec.html#vkCmdBindDescriptorSets
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This page is extracted from the Vulkan Specification.
Fixes and changes should be made to the Specification,not directly.
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include::footer.txt[]