912 lines
33 KiB
Plaintext
912 lines
33 KiB
Plaintext
// Copyright (c) 2015-2016 The Khronos Group Inc.
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// Copyright notice at https://www.khronos.org/registry/speccopyright.html
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// The asciidoc [glossary] template cannot contain subsections.
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// The abbreviations and prefixes probably belong in the upcoming
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// API/extension-writing-guidelines appendix, anyway.
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[glossary]
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= Glossary
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The terms defined in this section are used consistently throughout this
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Specification and may be used with or without capitalization.
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Accessible (Descriptor Binding)::
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A descriptor binding is accessible to a shader stage if that stage is
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included in the pname:stageFlags of the descriptor binding.
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Descriptors using that binding can: only be used by stages in which they
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are accessible.
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Adjacent Vertex::
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A vertex in an adjacency primitive topology that is not part of a given
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primitive, but is accessible in geometry shaders.
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Aliased Range (Memory)::
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A range of a device memory allocation that is bound to multiple
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resources simultaneously.
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Allocation Scope::
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An association of a host memory allocation to a parent object or
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command, where the allocation's lifetime ends before or at the same time
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as the parent object is freed or destroyed, or during the parent
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command.
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API Order::
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A set of ordering rules that govern how primitives in draw commands
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affect the framebuffer.
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Aspect (Image)::
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An image may: contain multiple kinds, or aspects, of data for each
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pixel, where each aspect is used in a particular way by the pipeline and
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may: be stored differently or separately from other aspects.
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For example, the color components of an image format make up the color
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aspect of the image, and may: be used as a framebuffer color attachment.
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Some operations, like depth testing, operate only on specific aspects of
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an image.
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Others operations, like image/buffer copies, only operate on one aspect
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at a time.
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Attachment (Render Pass)::
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A zero-based integer index name used in render pass creation to refer to
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a framebuffer attachment that is accessed by one or more subpasses.
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The index also refers to an attachment description which includes
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information about the properties of the image view that will later be
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attached.
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Available::
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See Memory Dependency.
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Back-Facing::
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See Facingness.
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Batch::
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A single structure submitted to a queue as part of a
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<<devsandqueues-submission, queue submission command>>, describing a set
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of queue operations to execute.
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Backwards Compatibility::
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A given version of the API is backwards compatible with an earlier
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version if an application, relying only on valid behavior and
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functionality defined by the earlier specification, is able to correctly
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run against each version without any modification.
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This assumes no active attempt by that application to not run when it
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detects a different version.
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Full Compatibility::
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A given version of the API is fully compatible with another version if
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an application, relying only on valid behavior and functionality defined
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by either of those specifications, is able to correctly run against each
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version without any modification.
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This assumes no active attempt by that application to not run when it
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detects a different version.
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Binding (Memory)::
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An association established between a range of a resource object and a
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range of a memory object.
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These associations determine the memory locations affected by operations
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performed on elements of a resource object.
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Memory bindings are established using the flink:vkBindBufferMemory
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command for non-sparse buffer objects, using the flink:vkBindImageMemory
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command for non-sparse image objects, and using the
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flink:vkQueueBindSparse command for sparse resources.
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Blend Constant::
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Four floating point (RGBA) values used as an input to blending.
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Blending::
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Arithmetic operations between a fragment color value and a value in a
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color attachment that produce a final color value to be written to the
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attachment.
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Buffer::
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A resource that represents a linear array of data in device memory.
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Represented by a sname:VkBuffer object.
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Buffer View::
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An object that represents a range of a specific buffer, and state that
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controls how the contents are interpreted.
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Represented by a sname:VkBufferView object.
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Built-In Variable::
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A variable decorated in a shader, where the decoration makes the
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variable take values provided by the execution environment or values
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that are generated by fixed-function pipeline stages.
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Built-In Interface Block::
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A block defined in a shader that contains only variables decorated with
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built-in decorations, and is used to match against other shader stages.
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Clip Coordinates::
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The homogeneous coordinate space that vertex positions (code:Position
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decoration) are written in by vertex processing stages.
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Clip Distance::
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A built-in output from vertex processing stages that defines a clip
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half-space against which the primitive is clipped.
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Clip Volume::
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The intersection of the view volume with all clip half-spaces.
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Color Attachment::
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A subpass attachment point, or image view, that is the target of
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fragment color outputs and blending.
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Combined Image Sampler::
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A descriptor type that includes both a sampled image and a sampler.
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Command Buffer::
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An object that records commands to be submitted to a queue.
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Represented by a sname:VkCommandBuffer object.
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Command Pool::
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An object that command buffer memory is allocated from, and that owns
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that memory.
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Command pools aid multithreaded performance by enabling different
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threads to use different allocators, without internal synchronization on
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each use.
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Represented by a sname:VkCommandPool object.
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Compatible Allocator::
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When allocators are compatible, allocations from each allocator can: be
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freed by the other allocator.
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Compatible Image Formats::
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When formats are compatible, images created with one of the formats can:
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have image views created from it using any of the compatible formats.
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Compatible Queues::
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Queues within a queue family.
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Compatible queues have identical properties.
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Component (Format)::
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A distinct part of a format.
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Depth, stencil, and color channels (e.g. R, G, B, A), are all separate
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components.
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Compressed Texel Block::
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An element of an image having a block-compressed format, comprising a
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rectangular block of texel values that are encoded as a single value in
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memory.
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Compressed texel blocks of a particular block-compressed format have a
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corresponding width, height, and depth that define the dimensions of
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these elements in units of texels, and a size in bytes of the encoding
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in memory.
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Cull Distance::
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A built-in output from vertex processing stages that defines a cull
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half-space where the primitive is rejected if all vertices have a
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negative value for the same cull distance.
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Cull Volume::
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The intersection of the view volume with all cull half-spaces.
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Decoration (SPIR-V)::
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Auxiliary information such as built-in variables, stream numbers,
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invariance, interpolation type, relaxed precision, etc., added to
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variables or structure-type members through decorations.
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Depth/Stencil Attachment::
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A subpass attachment point, or image view, that is the target of depth
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and/or stencil test operations and writes.
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Depth/Stencil Format::
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A elink:VkFormat that includes depth and/or stencil components.
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Depth/Stencil Image (or ImageView)::
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A sname:VkImage (or sname:VkImageView) with a depth/stencil format.
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Derivative Group::
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A set of fragment shader invocations that cooperate to compute
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derivatives, including implicit derivatives for sampled image
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operations.
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Descriptor::
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Information about a resource or resource view written into a descriptor
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set that is used to access the resource or view from a shader.
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Descriptor Binding::
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An entry in a descriptor set layout corresponding to zero or more
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descriptors of a single descriptor type in a set.
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Defined by a slink:VkDescriptorSetLayoutBinding structure.
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Descriptor Pool::
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An object that descriptor sets are allocated from, and that owns the
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storage of those descriptor sets.
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Descriptor pools aid multithreaded performance by enabling different
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threads to use different allocators, without internal synchronization on
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each use.
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Represented by a sname:VkDescriptorPool object.
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Descriptor Set::
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An object that resource descriptors are written into via the API, and
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that can: be bound to a command buffer such that the descriptors
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contained within it can: be accessed from shaders.
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Represented by a sname:VkDescriptorSet object.
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Descriptor Set Layout::
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An object that defines the set of resources (types and counts) and their
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relative arrangement (in the binding namespace) within a descriptor set.
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Used when allocating descriptor sets and when creating pipeline layouts.
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Represented by a sname:VkDescriptorSetLayout object.
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Device::
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The processor(s) and execution environment that perform tasks requested
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by the application via the Vulkan API.
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Device Memory::
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Memory accessible to the device.
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Represented by a sname:VkDeviceMemory object.
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Device-Level Object::
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Logical device objects and their child objects For example,
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sname:VkDevice, sname:VkQueue, and sname:VkCommandBuffer objects are
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device-level objects.
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Device-Local Memory::
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Memory that is connected to the device, and may: be more performant for
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device access than host-local memory.
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Dispatchable Handle::
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A handle of a pointer handle type which may: be used by layers as part
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of intercepting API commands.
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The first argument to each Vulkan command is a dispatchable handle type.
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Dispatching Commands::
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Commands that provoke work using a compute pipeline.
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Includes flink:vkCmdDispatch and flink:vkCmdDispatchIndirect.
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Drawing Commands::
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Commands that provoke work using a graphics pipeline.
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Includes flink:vkCmdDraw, flink:vkCmdDrawIndexed,
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flink:vkCmdDrawIndirect, and flink:vkCmdDrawIndexedIndirect.
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Duration (Command)::
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The _duration_ of a Vulkan command refers to the interval between
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calling the command and its return to the caller.
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Dynamic Storage Buffer::
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A storage buffer whose offset is specified each time the storage buffer
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is bound to a command buffer via a descriptor set.
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Dynamic Uniform Buffer::
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A uniform buffer whose offset is specified each time the uniform buffer
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is bound to a command buffer via a descriptor set.
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Dynamically Uniform::
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See _Dynamically Uniform_ in section 2.2 ``Terms'' of the
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<<spirv-spec,Khronos SPIR-V Specification>>.
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Element Size::
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The size (in bytes) used to store one element of an uncompressed format
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or the size (in bytes) used to store one block of a block-compressed
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format.
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Explicitly-Enabled Layer::
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A layer enabled by the application by adding it to the enabled layer
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list in flink:vkCreateInstance or flink:vkCreateDevice.
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Event::
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A synchronization primitive that is signaled when execution of previous
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commands complete through a specified set of pipeline stages.
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Events can be waited on by the device and polled by the host.
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Represented by a sname:VkEvent object.
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Executable State (Command Buffer)::
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A command buffer that has ended recording commands and can: be executed.
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See also Initial State and Recording State.
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Execution Dependency::
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A dependency that guarantees that certain pipeline stages' work for a
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first set of commands has completed execution before certain pipeline
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stages' work for a second set of commands begins execution.
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This is accomplished via pipeline barriers, subpass dependencies,
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events, or implicit ordering operations.
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Execution Dependency Chain::
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A sequence of execution dependencies that transitively act as an
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execution dependency.
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Extension Scope::
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The set of objects and commands that can: be affected by an extension.
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Extensions are either device scope or instance scope.
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External synchronization::
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A type of synchronization required: of the application, where parameters
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defined to be externally synchronized must: not be used simultaneously
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in multiple threads.
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Facingness (Polygon)::
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A classification of a polygon as either front-facing or back-facing,
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depending on the orientation (winding order) of its vertices.
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Fence::
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A synchronization primitive that is signaled when a set of batches or
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sparse binding operations complete execution on a queue.
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Fences can: be waited on by the host.
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Represented by a sname:VkFence object.
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Flat Shading::
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A property of a vertex attribute that causes the value from a single
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vertex (the provoking vertex) to be used for all vertices in a
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primitive, and for interpolation of that attribute to return that single
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value unaltered.
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Fragment Input Attachment Interface::
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A fragment shader entry point's variables with code:UniformConstant
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storage class and a decoration of code:InputAttachmentIndex, which
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receive values from input attachments.
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Fragment Output Interface::
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A fragment shader entry point's variables with code:Output storage
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class, which output to color and/or depth/stencil attachments.
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Framebuffer::
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A collection of image views and a set of dimensions that, in conjunction
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with a render pass, define the inputs and outputs used by drawing
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commands.
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Represented by a sname:VkFramebuffer object.
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Framebuffer Attachment::
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One of the image views used in a framebuffer.
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Framebuffer Coordinates::
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A coordinate system in which adjacent pixels' coordinates differ by 1 in
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x and/or y, with [eq]#(0,0)# in the upper left corner and pixel centers
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at half-integers.
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Front-Facing::
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See Facingness.
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Global Workgroup::
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A collection of local workgroups dispatched by a single dispatch
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command.
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Handle::
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An opaque integer or pointer value used to refer to a Vulkan object.
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Each object type has a unique handle type.
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Happen-after::
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A command happens-after a dependency if they are separated by an
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execution dependency chain, with the command included in the destination
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of the last dependency of the chain.
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A memory barrier makes visible memory writes to commands that
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happen-after it.
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Happen-before::
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A command happens-before a dependency if they are separated by an
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execution dependency chain, with the command included in the source of
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the first dependency of the chain.
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A memory barrier makes available memory writes of commands that
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happen-before it.
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Helper Invocation::
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A fragment shader invocation that is created solely for the purposes of
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evaluating derivatives for use in non-helper fragment shader
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invocations, and which does not have side effects.
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Host::
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The processor(s) and execution environment that the application runs on,
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and that the Vulkan API is exposed on.
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Host Memory::
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Memory not accessible to the device, used to store implementation data
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structures.
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Host-Accessible Subresource::
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A buffer, or a linear image subresource in either the
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ename:VK_IMAGE_LAYOUT_PREINITIALIZED or ename:VK_IMAGE_LAYOUT_GENERAL
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layout.
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Host-accessible subresources have a well-defined addressing scheme which
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can be used by the host.
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Host-Local Memory::
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Memory that is not local to the device, and may: be less performant for
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device access than device-local memory.
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Host-Visible Memory::
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Device memory that can: be mapped on the host and can: be read and
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written by the host.
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Image::
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A resource that represents a multi-dimensional formatted interpretation
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of device memory.
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Represented by a sname:VkImage object.
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Image Subresource::
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A specific mipmap level and layer of an image.
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Image Subresource Range::
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A set of image subresources that are contiguous mipmap levels and
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layers.
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Image View::
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An object that represents an image subresource range of a specific
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image, and state that controls how the contents are interpreted.
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Represented by a sname:VkImageView object.
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Immutable Sampler::
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A sampler descriptor provided at descriptor set layout creation time,
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and that is used for that binding in all descriptor sets allocated from
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the layout, and cannot be changed.
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Implicitly-Enabled Layer::
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A layer enabled by a loader-defined mechanism outside the Vulkan API,
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rather than explicitly by the application during instance or device
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creation.
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Index Buffer::
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A buffer bound via flink:vkCmdBindIndexBuffer which is the source of
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index values used to fetch vertex attributes for a
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flink:vkCmdDrawIndexed or flink:vkCmdDrawIndexedIndirect command.
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Indirect Commands::
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Drawing or dispatching commands that source some of their parameters
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from structures in buffer memory.
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Includes flink:vkCmdDrawIndirect, flink:vkCmdDrawIndexedIndirect, and
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flink:vkCmdDispatchIndirect.
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Initial State (Command Buffer)::
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A command buffer that has not begun recording commands.
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See also Recorded State and Executable State.
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Input Attachment::
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A descriptor type that represents an image view, and supports unfiltered
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read-only access in a shader, only at the fragment's location in the
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view.
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Instance::
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The top-level Vulkan object, which represents the application's
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connection to the implementation.
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Represented by a sname:VkInstance object.
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Instance-Level Object::
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High-level Vulkan objects, which are not logical devices, nor children
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of logical devices.
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For example, sname:VkInstance and sname:VkPhysicalDevice objects are
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instance-level objects.
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Internal Synchronization::
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A type of synchronization required: of the implementation, where
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parameters not defined to be externally synchronized may: require
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internal mutexing to avoid multithreaded race conditions.
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Invocation (Shader)::
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A single execution of an entry point in a SPIR-V module.
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For example, a single vertex's execution of a vertex shader or a single
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fragment's execution of a fragment shader.
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Invocation Group::
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A set of shader invocations that are executed in parallel and that must:
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execute the same control flow path in order for control flow to be
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considered dynamically uniform.
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Local Workgroup::
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A collection of compute shader invocations invoked by a single dispatch
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command, which share shared memory and can synchronize with each other.
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Logical Device::
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An object that represents the application's interface to the physical
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device.
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The logical device is the parent of most Vulkan objects.
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Represented by a sname:VkDevice object.
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Logical Operation::
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Bitwise operations between a fragment color value and a value in a color
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attachment, that produce a final color value to be written to the
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attachment.
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Lost Device::
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A state that a logical device may: be in as a result of hardware errors
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or other exceptional conditions.
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Mappable::
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See Host-Visible Memory.
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Memory Dependency::
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A sequence of operations that makes writes available, performs an
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execution dependency between the writes and subsequent accesses, and
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makes available writes visible to later accesses.
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In order for the effects of a write to be coherent with later accesses,
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it must: be made available from the old access type and then made
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visible to the new access type.
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Memory Heap::
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A region of memory from which device memory allocations can: be made.
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Memory Type::
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An index used to select a set of memory properties (e.g. mappable,
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cached) for a device memory allocation.
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Mip Tail Region::
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The set of mipmap levels of a sparse residency texture that are too
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small to fill a sparse block, and that must: all be bound to memory
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collectively and opaquely.
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Non-Dispatchable Handle::
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A handle of an integer handle type.
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Handle values may: not be unique, even for two objects of the same type.
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Normalized::
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A value that is interpreted as being in the range [eq]#[0,1]# as a
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result of being implicitly divided by some other value.
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Normalized Device Coordinates::
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A coordinate space after perspective division is applied to clip
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coordinates, and before the viewport transformation converts to
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framebuffer coordinates.
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Overlapped Range (Aliased Range)::
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|
The aliased range of a device memory allocation that intersects a given
|
|
image subresource of an image or range of a buffer.
|
|
|
|
Packed Format::
|
|
A format whose components are stored as a single data element in memory,
|
|
with their relative locations defined within that element.
|
|
|
|
Physical Device::
|
|
An object that represents a single device in the system.
|
|
Represented by a sname:VkPhysicalDevice object.
|
|
|
|
Pipeline::
|
|
An object that controls how graphics or compute work is executed on the
|
|
device.
|
|
A pipeline includes one or more shaders, as well as state controlling
|
|
any non-programmable stages of the pipeline.
|
|
Represented by a sname:VkPipeline object.
|
|
|
|
Pipeline Barrier::
|
|
An execution and/or memory dependency recorded as an explicit command in
|
|
a command buffer, that forms a dependency between the previous and
|
|
subsequent commands.
|
|
|
|
Pipeline Cache::
|
|
An object that can: be used to collect and retrieve information from
|
|
pipelines as they are created, and can: be populated with previously
|
|
retrieved information in order to accelerate pipeline creation.
|
|
Represented by a sname:VkPipelineCache object.
|
|
|
|
Pipeline Layout::
|
|
An object that defines the set of resources (via a collection of
|
|
descriptor set layouts) and push constants used by pipelines that are
|
|
created using the layout.
|
|
Used when creating a pipeline and when binding descriptor sets and
|
|
setting push constant values.
|
|
Represented by a sname:VkPipelineLayout object.
|
|
|
|
Point Sampling (Rasterization)::
|
|
A rule that determines whether a fragment sample location is covered by
|
|
a polygon primitive by testing whether the sample location is in the
|
|
interior of the polygon in framebuffer-space, or on the boundary of the
|
|
polygon according to the tie-breaking rules.
|
|
|
|
Preserve Attachment::
|
|
One of a list of attachments in a subpass description that is not read
|
|
or written by the subpass, but that is read or written on earlier and
|
|
later subpasses and whose contents must be preserved through this
|
|
subpass.
|
|
|
|
Primary Command Buffer::
|
|
A command buffer that can: execute secondary command buffers, and can:
|
|
be submitted directly to a queue.
|
|
|
|
Primitive Topology::
|
|
State that controls how vertices are assembled into primitives, e.g. as
|
|
lists of triangles, strips of lines, etc..
|
|
|
|
Provoking Vertex::
|
|
The vertex in a primitive from which flat shaded attribute values are
|
|
taken.
|
|
This is generally the ``first'' vertex in the primitive, and depends on
|
|
the primitive topology.
|
|
|
|
Push Constants::
|
|
A small bank of values writable via the API and accessible in shaders.
|
|
Push constants allow the application to set values used in shaders
|
|
without creating buffers or modifying and binding descriptor sets for
|
|
each update.
|
|
|
|
Push Constant Interface::
|
|
The set of variables with code:PushConstant storage class that are
|
|
statically used by a shader entry point, and which receive values from
|
|
push constant commands.
|
|
|
|
Query Pool::
|
|
An object that contains a number of query entries and their associated
|
|
state and results.
|
|
Represented by a sname:VkQueryPool object.
|
|
|
|
Queue::
|
|
An object that executes command buffers and sparse binding operations on
|
|
a device.
|
|
Represented by a sname:VkQueue object.
|
|
|
|
Queue Family::
|
|
A set of queues that have common properties and support the same
|
|
functionality, as advertised in slink:VkQueueFamilyProperties.
|
|
|
|
Queue Operation::
|
|
A unit of work to be executed by a specific queue on a device, submitted
|
|
via a <<devsandqueues-submission, queue submission command>>.
|
|
Each queue submission command details the specific queue operations that
|
|
occur as a result of calling that command.
|
|
Queue operations typically include work that is specific to each
|
|
command, and synchronization tasks.
|
|
|
|
Queue Submission::
|
|
Zero or more batches and an optional fence to be signaled, passed to a
|
|
command for execution on a queue.
|
|
See the <<devsandqueues-submission, Devices and Queues chapter>> for
|
|
more information.
|
|
|
|
Recording State (Command Buffer)::
|
|
A command buffer that is ready to record commands.
|
|
See also Initial State and Executable State.
|
|
|
|
Render Pass::
|
|
An object that represents a set of framebuffer attachments and phases of
|
|
rendering using those attachments.
|
|
Represented by a sname:VkRenderPass object.
|
|
|
|
Render Pass Instance::
|
|
A use of a render pass in a command buffer.
|
|
|
|
Reset (Command Buffer)::
|
|
Resetting a command buffer discards any previously recorded commands and
|
|
puts a command buffer in the initial state.
|
|
|
|
Residency Code::
|
|
An integer value returned by sparse image instructions, indicating
|
|
whether any sparse unbound texels were accessed.
|
|
|
|
Resolve Attachment::
|
|
A subpass attachment point, or image view, that is the target of a
|
|
multisample resolve operation from the corresponding color attachment at
|
|
the end of the subpass.
|
|
|
|
Sampled Image::
|
|
A descriptor type that represents an image view, and supports filtered
|
|
(sampled) and unfiltered read-only acccess in a shader.
|
|
|
|
Sampler::
|
|
An object that contains state that controls how sampled image data is
|
|
sampled (or filtered) when accessed in a shader.
|
|
Also a descriptor type describing the object.
|
|
Represented by a sname:VkSampler object.
|
|
|
|
Secondary Command Buffer::
|
|
A command buffer that can: be executed by a primary command buffer, and
|
|
must: not be submitted directly to a queue.
|
|
|
|
Self-Dependency::
|
|
A subpass dependency from a subpass to itself, i.e. with
|
|
pname:srcSubpass equal to pname:dstSubpass.
|
|
A self-dependency is not automatically performed during a render pass
|
|
instance, rather a subset of it can: be performed via
|
|
flink:vkCmdPipelineBarrier during the subpass.
|
|
|
|
Semaphore::
|
|
A synchronization primitive that supports signal and wait operations,
|
|
and can: be used to synchronize operations within a queue or across
|
|
queues.
|
|
Represented by a sname:VkSemaphore object.
|
|
|
|
Shader::
|
|
Instructions selected (via an entry point) from a shader module, which
|
|
are executed in a shader stage.
|
|
|
|
Shader Code::
|
|
A stream of instructions used to describe the operation of a shader.
|
|
|
|
Shader Module::
|
|
A collection of shader code, potentially including several functions and
|
|
entry points, that is used to create shaders in pipelines.
|
|
Represented by a sname:VkShaderModule object.
|
|
|
|
Shader Stage::
|
|
A stage of the graphics or compute pipeline that executes shader code.
|
|
|
|
Side Effect::
|
|
A store to memory or atomic operation on memory from a shader
|
|
invocation.
|
|
|
|
Sparse Block::
|
|
An element of a sparse resource that can be independently bound to
|
|
memory.
|
|
Sparse blocks of a particular sparse resource have a corresponding size
|
|
in bytes that they use in the bound memory.
|
|
|
|
Sparse Image Block::
|
|
A sparse block in a sparse partially-resident image.
|
|
In addition to the sparse block size in bytes, sparse image blocks have
|
|
a corresponding width, height, and depth that define the dimensions of
|
|
these elements in units of texels or compressed texel blocks, the latter
|
|
being used in case of sparse images having a block-compressed format.
|
|
|
|
Sparse Unbound Texel::
|
|
A texel read from a region of a sparse texture that does not have memory
|
|
bound to it.
|
|
|
|
Static Use::
|
|
An object in a shader is statically used by a shader entry point if any
|
|
function in the entry point's call tree contains an instruction using
|
|
the object.
|
|
Static use is used to constrain the set of descriptors used by a shader
|
|
entry point.
|
|
|
|
Storage Buffer::
|
|
A descriptor type that represents a buffer, and supports reads, writes,
|
|
and atomics in a shader.
|
|
|
|
Storage Image::
|
|
A descriptor type that represents an image view, and supports unfiltered
|
|
loads, stores, and atomics in a shader.
|
|
|
|
Storage Texel Buffer::
|
|
A descriptor type that represents a buffer view, and supports
|
|
unfiltered, formatted reads, writes, and atomics in a shader.
|
|
|
|
Subpass::
|
|
A phase of rendering within a render pass, that reads and writes a
|
|
subset of the attachments.
|
|
|
|
Subpass Dependency::
|
|
An execution and/or memory dependency between two subpasses described as
|
|
part of render pass creation, and automatically performed between
|
|
subpasses in a render pass instance.
|
|
A subpass dependency limits the overlap of execution of the pair of
|
|
subpasses, and can: provide guarantees of memory coherence between
|
|
accesses in the subpasses.
|
|
|
|
Subpass Description::
|
|
Lists of attachment indices for input attachments, color attachments,
|
|
depth/stencil attachment, resolve attachments, and preserve attachments
|
|
used by the subpass in a render pass.
|
|
|
|
Subset (Self-Dependency)::
|
|
A subset of a self-dependency is a pipeline barrier performed during the
|
|
subpass of the self-dependency, and whose stage masks and access masks
|
|
each contain a subset of the bits set in the identically named mask in
|
|
the self-dependency.
|
|
|
|
Texel Coordinate System::
|
|
One of three coordinate systems (normalized, unnormalized, integer) that
|
|
define how texel coordinates are interpreted in an image or a specific
|
|
mipmap level of an image.
|
|
|
|
Uniform Texel Buffer::
|
|
A descriptor type that represents a buffer view, and supports
|
|
unfiltered, formatted, read-only access in a shader.
|
|
|
|
Uniform Buffer::
|
|
A descriptor type that represents a buffer, and supports read-only
|
|
access in a shader.
|
|
|
|
Unnormalized::
|
|
A value that is interpreted according to its conventional
|
|
interpretation, and is not normalized.
|
|
|
|
User-Defined Variable Interface::
|
|
A shader entry point's variables with code:Input or code:Output storage
|
|
class that are not built-in variables.
|
|
|
|
Vertex Input Attribute::
|
|
A graphics pipeline resource that produces input values for the vertex
|
|
shader by reading data from a vertex input binding and converting it to
|
|
the attribute's format.
|
|
|
|
Vertex Input Binding::
|
|
A graphics pipeline resource that is bound to a buffer and includes
|
|
state that affects addressing calculations within that buffer.
|
|
|
|
Vertex Input Interface::
|
|
A vertex shader entry point's variables with code:Input storage class,
|
|
which receive values from vertex input attributes.
|
|
|
|
Vertex Processing Stages::
|
|
A set of shader stages that comprises the vertex shader, tessellation
|
|
control shader, tessellation evaluation shader, and geometry shader
|
|
stages.
|
|
|
|
View Volume::
|
|
A subspace in homogeneous coordinates, corresponding to post-projection
|
|
x and y values between -1 and +1, and z values between 0 and +1.
|
|
|
|
Viewport Transformation::
|
|
A transformation from normalized device coordinates to framebuffer
|
|
coordinates, based on a viewport rectangle and depth range.
|
|
|
|
Visible::
|
|
See Memory Dependency.
|
|
|
|
// To be added per issue 18:
|
|
// Current State <<fundamentals-queueoperation>>
|
|
// Barycentric Coordinates <<primsrast-polygons-basic>>
|
|
// Internal Allocations <<memory-host-allocation-scope>>
|
|
// Unavailable, Available <<queries-operation>>
|
|
// Signaled, Unsignaled <<synchronization-semaphores>> <<synchronization-fences>>
|
|
// Interior Vertices <<tessellation-tessellator-spacing>>
|
|
// Inner Vertices <<tessellation-triangle-tessellation>> <<tessellation-quad-tessellation>>
|
|
// Isolines <<tessellation-isoline-tessellation>>
|
|
// Binding Range <<sparsemem-memory-binding>>
|
|
|
|
|
|
[glossary]
|
|
= Common Abbreviations
|
|
|
|
Abbreviations and acronyms are sometimes used in the Specification and the
|
|
API where they are considered clear and commonplace, and are defined here:
|
|
|
|
Src::
|
|
Source
|
|
|
|
Dst::
|
|
Destination
|
|
|
|
Min::
|
|
Minimum
|
|
|
|
Max::
|
|
Maximum
|
|
|
|
Rect::
|
|
Rectangle
|
|
|
|
Info::
|
|
Information
|
|
|
|
LOD::
|
|
Level of Detail
|
|
|
|
ID::
|
|
Identifier
|
|
|
|
UUID::
|
|
Universally Unique Identifier
|
|
|
|
Op::
|
|
Operation
|
|
|
|
R::
|
|
Red color component
|
|
|
|
G::
|
|
Green color component
|
|
|
|
B::
|
|
Blue color component
|
|
|
|
A::
|
|
Alpha color component
|
|
|
|
|
|
[glossary]
|
|
= Prefixes
|
|
|
|
Prefixes are used in the API to denote specific semantic meaning of Vulkan
|
|
names, or as a label to avoid name clashes, and are explained here:
|
|
|
|
VK/Vk/vk::
|
|
Vulkan namespace +
|
|
All types, commands, enumerants and defines in this specification are
|
|
prefixed with these two characters.
|
|
|
|
PFN/pfn::
|
|
Function Pointer +
|
|
Denotes that a type is a function pointer, or that a variable is of a
|
|
pointer type.
|
|
|
|
p::
|
|
Pointer +
|
|
Variable is a pointer.
|
|
|
|
vkCmd::
|
|
Commands that record commands in command buffers +
|
|
These API commands do not result in immediate processing on the device.
|
|
Instead, they record the requested action in a command buffer for
|
|
execution when the command buffer is submitted to a queue.
|
|
|
|
s::
|
|
Structure +
|
|
Used to denote the etext:VK_STRUCTURE_TYPE* member of each structure in
|
|
pname:sType
|