Vulkan-Docs/doc/specs/vulkan/man/VkBufferCreateInfo.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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VkBufferCreateInfo(3)
=====================
Name
----
VkBufferCreateInfo - Structure specifying the parameters of a newly created buffer object.
C Specification
---------------
// refBegin VkBufferCreateInfo Structure specifying the parameters of a newly created buffer object.
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The sname:VkBufferCreateInfo structure is defined as:
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include::../structs/VkBufferCreateInfo.txt[]
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Members
-------
* pname:sType is the type of this structure.
* pname:pNext is `NULL` or a pointer to an extension-specific structure.
* pname:flags is a bitmask describing additional parameters of the
buffer. See elink:VkBufferCreateFlagBits below for a description of the
supported bits.
* pname:size is the size in bytes of the buffer to be created.
* pname:usage is a bitmask describing the allowed usages of the buffer.
See elink:VkBufferUsageFlagBits below for a description of the supported
bits.
* pname:sharingMode is the sharing mode of the buffer when it will be
accessed by multiple queue families, see elink:VkSharingMode in the
<<resources-sharing,Resource Sharing>> section below for supported
values.
* pname:queueFamilyIndexCount is the number of entries in the
pname:pQueueFamilyIndices array.
* pname:pQueueFamilyIndices is a list of queue families that will
access this buffer (ignored if pname:sharingMode is not
ename:VK_SHARING_MODE_CONCURRENT).
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Description
-----------
Bits which can: be set in pname:usage are:
// refBegin VkBufferUsageFlagBits - Bitmask specifying allowed usage of a buffer
include::../enums/VkBufferUsageFlagBits.txt[]
* ename:VK_BUFFER_USAGE_TRANSFER_SRC_BIT indicates that the buffer can: be
used as the source of a _transfer command_ (see the definition of
<<synchronization-transfer,ename:VK_PIPELINE_STAGE_TRANSFER_BIT>>).
* ename:VK_BUFFER_USAGE_TRANSFER_DST_BIT indicates that the buffer
can: be used as the destination of a transfer command.
* ename:VK_BUFFER_USAGE_UNIFORM_TEXEL_BUFFER_BIT indicates that the buffer
can: be used to create a sname:VkBufferView suitable for occupying a
sname:VkDescriptorSet slot of type
ename:VK_DESCRIPTOR_TYPE_UNIFORM_TEXEL_BUFFER.
* ename:VK_BUFFER_USAGE_STORAGE_TEXEL_BUFFER_BIT indicates that the buffer
can: be used to create a sname:VkBufferView suitable for occupying a
sname:VkDescriptorSet slot of type
ename:VK_DESCRIPTOR_TYPE_STORAGE_TEXEL_BUFFER.
* ename:VK_BUFFER_USAGE_UNIFORM_BUFFER_BIT indicates that the buffer can:
be used in a sname:VkDescriptorBufferInfo suitable for occupying a
sname:VkDescriptorSet slot either of type
ename:VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER or
ename:VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER_DYNAMIC.
* ename:VK_BUFFER_USAGE_STORAGE_BUFFER_BIT indicates that the buffer can:
be used in a sname:VkDescriptorBufferInfo suitable for occupying a
sname:VkDescriptorSet slot either of type
ename:VK_DESCRIPTOR_TYPE_STORAGE_BUFFER or
ename:VK_DESCRIPTOR_TYPE_STORAGE_BUFFER_DYNAMIC.
* ename:VK_BUFFER_USAGE_INDEX_BUFFER_BIT indicates that the buffer is
suitable for passing as the pname:buffer parameter to
fname:vkCmdBindIndexBuffer.
* ename:VK_BUFFER_USAGE_VERTEX_BUFFER_BIT indicates that the buffer is
suitable for passing as an element of the pname:pBuffers array to
fname:vkCmdBindVertexBuffers.
* ename:VK_BUFFER_USAGE_INDIRECT_BUFFER_BIT indicates that the buffer is
suitable for passing as the pname:buffer parameter to
fname:vkCmdDrawIndirect, fname:vkCmdDrawIndexedIndirect, or
fname:vkCmdDispatchIndirect.
Any combination of bits can: be specified for pname:usage, but at least one
of the bits must: be set in order to create a valid buffer.
Bits which can: be set in pname:flags are:
// refBegin VkBufferCreateFlagBits - Bitmask specifying additional parameters of a buffer
include::../enums/VkBufferCreateFlagBits.txt[]
These bits have the following meanings:
* ename:VK_BUFFER_CREATE_SPARSE_BINDING_BIT indicates that the buffer will
be backed using sparse memory binding.
* ename:VK_BUFFER_CREATE_SPARSE_RESIDENCY_BIT indicates that the buffer
can: be partially backed using sparse memory binding. Buffers
created with this flag must: also be created with the
ename:VK_BUFFER_CREATE_SPARSE_BINDING_BIT flag.
* ename:VK_BUFFER_CREATE_SPARSE_ALIASED_BIT indicates that the buffer will
be backed using sparse memory binding with memory ranges that might also
simultaneously be backing another buffer (or another portion of the same
buffer). Buffers created with this flag must: also be created
with the ename:VK_BUFFER_CREATE_SPARSE_BINDING_BIT flag.
See <<sparsememory-sparseresourcefeatures,Sparse Resource Features>> and
<<features-features,Physical Device Features>> for details of the sparse
memory features supported on a device.
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include::../validity/structs/VkBufferCreateInfo.txt[]
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See Also
--------
Change log for July 15, 2016 Vulkan 1.0.21 spec update: * Bump API patch number and header version number to 21 for this update. Github Issues: * Clarify how <<features-supported-sample-counts,sample count queries>> relate to the limits in slink:VkPhysicalDeviceLimits. (public issue 185). * Clarify in the <<interfaces-iointerfaces,Shader Input and Output Interfaces>> section that shader output variables have undefined values until the shader writes to them (public issue 240). * Specify the implicit value of image parameters that cannot be set in slink:VkSwapchainCreateInfo::pname:flags, pname:imageType, pname:mipLevels, pname:samples, pname:tiling, and pname:initialLayout (public issue 243). * Make use of code:NULL and code:VK_NULL_HANDLE consistent in the VK_KHR_swapchain extension (public issue 276). Internal Issues: * Clarify that presenting an image to a display surface swapchain applies the display surface's mode, and that destroying a display surface swapchain may reset the display's mode, in the VK_KHR_display_swapchain extension (internal issue 247). * Better describe what a slink:VkSurfaceKHR is, and that creating one does not set a mode, in the VK_KHR_display extension. This is a round-about way of pointing out that mode setting is not covered by the extension, but rather is performed as a side effect of presentation (internal issue 247). * Add more valid usage statements to flink:vkQueuePresentKHR command when the VK_KHR_display_swapchain extension is present (internal issue 247). * Add more includes to the VK_KHR_swapchain extension to better document interactions with VK_KHR_display_swapchain (internal issue 247). * Clarify restrictions on location aliasing in the <<fxvertex,Fixed-Function Vertex Processing>> section (internal issue 370). * Add mathematical description of blitting to flink:vkCmdBlitImage, and link it to the <<textures,Image Operations>> chapter. Use mathematical notation for ranges of texel coordinates in the <<textures,Image Operations>> chapter. Fixed miscellaneous validity statements for flink:vkCmdBlit and slink:VkImageBlit (internal issue 382). Other Commits: * Added a valid usage rule to flink:VkGraphicsPipelineCreateInfo that the ename:VK_PRIMITIVE_TOPOLOGY_PATCH_LIST topology must only be used when tessellation shaders are used. * Expand the style guide into a formal "Procedures and Conventions" document. Add a API Naming Conventions section, move most of the API Specification Appendix C (Layers and Extensions) content into the new document, and define the resulting procedures as mandatory (where relevant). This more clearly separates use vs. specification of Vulkan APIs. * Update vk_platform.h to handle 32-bit ARMv8 binaries. * Various minor cleanups to the Makefile and build process.
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elink:VkBufferCreateFlags, elink:VkBufferUsageFlags, basetype:VkDeviceSize, elink:VkSharingMode, elink:VkStructureType, flink:vkCreateBuffer
Document Notes
--------------
For more information, see the Vulkan Specification at URL
https://www.khronos.org/registry/vulkan/specs/1.0/xhtml/vkspec.html#VkBufferCreateInfo
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[]