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Add VK_EXT_ycbcr_3plane_16bit_lsb_formats extension
This extension adds support for 10/12bit YCbCr formats used by software decoders like ffmpeg, dav1d and libvpx. See https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/34303
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‎appendices/VK_EXT_ycbcr_3plane_16bit_lsb_formats.adoc‎

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// Copyright 2026 The Khronos Group Inc.
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//
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// SPDX-License-Identifier: CC-BY-4.0
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include::{generated}/meta/{refprefix}VK_EXT_ycbcr_3plane_16bit_lsb_formats.adoc[]
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=== Other Extension Metadata
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*Last Modified Date*::
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2026-04-30
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*IP Status*::
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No known IP claims.
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*Contributors*::
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- Robert Mader, Collabora
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=== Description
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This extension adds some 10/12/14bit {YCbCr} formats that are in common use for
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video software encode and decode, but were not part of the
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`apiext:VK_KHR_sampler_ycbcr_conversion` extension.
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include::{generated}/interfaces/VK_EXT_ycbcr_3plane_16bit_lsb_formats.adoc[]
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=== Version History
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* Revision 1, 2026-04-30 (Robert Mader)
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** Initial draft

‎chapters/descriptorbuffers.adoc‎

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@@ -595,6 +595,22 @@ ifdef::VK_BASE_VERSION_1_3[Vulkan 1.3 is not supported and]
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ename:VK_FORMAT_G12X4_B12X4R12X4_2PLANE_444_UNORM_3PACK16, or
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ename:VK_FORMAT_G16_B16R16_2PLANE_444_UNORM
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endif::VK_EXT_ycbcr_2plane_444_formats[]
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ifdef::VK_EXT_ycbcr_3plane_16bit_lsb_formats[]
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* If the <<features-ycbcr3plane16BitLsbFormats,pname:ycbcr3plane16BitLsbFormats>>
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feature is not enabled, pname:format must: not be
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ename:VK_FORMAT_Z6R10_UNORM_EXT,
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ename:VK_FORMAT_Z4R12_UNORM_EXT,
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ename:VK_FORMAT_Z2R14_UNORM_EXT,
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ename:VK_FORMAT_Z6G10_Z6B10_Z6R10_3PLANE_420_UNORM_3PACK16_EXT,
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ename:VK_FORMAT_Z6G10_Z6B10_Z6R10_3PLANE_422_UNORM_3PACK16_EXT,
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ename:VK_FORMAT_Z6G10_Z6B10_Z6R10_3PLANE_444_UNORM_3PACK16_EXT,
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ename:VK_FORMAT_Z4G12_Z4B12_Z4R12_3PLANE_420_UNORM_3PACK16_EXT,
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ename:VK_FORMAT_Z4G12_Z4B12_Z4R12_3PLANE_422_UNORM_3PACK16_EXT,
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ename:VK_FORMAT_Z4G12_Z4B12_Z4R12_3PLANE_444_UNORM_3PACK16_EXT,
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ename:VK_FORMAT_Z2G14_Z2B14_Z2R14_3PLANE_420_UNORM_3PACK16_EXT,
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ename:VK_FORMAT_Z2G14_Z2B14_Z2R14_3PLANE_422_UNORM_3PACK16_EXT or
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ename:VK_FORMAT_Z2G14_Z2B14_Z2R14_3PLANE_444_UNORM_3PACK16_EXT
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endif::VK_EXT_ycbcr_3plane_16bit_lsb_formats[]
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****
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include::{generated}/validity/structs/VkDescriptorAddressInfoEXT.adoc[]

‎chapters/features.adoc‎

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@@ -6173,6 +6173,42 @@ endif::VK_BASE_VERSION_1_3[]
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--
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endif::VK_EXT_ycbcr_2plane_444_formats[]
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ifdef::VK_EXT_ycbcr_3plane_16bit_lsb_formats[]
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[open,refpage='VkPhysicalDeviceYcbcr3Plane16BitLsbFormatsFeaturesEXT',desc='Structure describing whether the implementation supports additional 3-plane 16bit LSB {YCbCr} formats',type='structs']
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--
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The sname:VkPhysicalDeviceYcbcr3Plane16BitLsbFormatsFeaturesEXT structure is
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defined as:
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include::{generated}/api/structs/VkPhysicalDeviceYcbcr3Plane16BitLsbFormatsFeaturesEXT.adoc[]
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This structure describes the following feature:
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* pname:sType is a elink:VkStructureType value identifying this structure.
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* pname:pNext is `NULL` or a pointer to a structure extending this
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structure.
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* [[features-ycbcr3plane16BitLsbFormats]] pname:ycbcr3plane16BitLsbFormats
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indicates that the implementation supports querying format features for, and
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using, the following 3-plane 16bit LSB {YCbCr} formats:
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** ename:VK_FORMAT_Z6R10_UNORM_EXT
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** ename:VK_FORMAT_Z4R12_UNORM_EXT
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** ename:VK_FORMAT_Z2R14_UNORM_EXT
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** ename:VK_FORMAT_Z6G10_Z6B10_Z6R10_3PLANE_420_UNORM_3PACK16_EXT
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** ename:VK_FORMAT_Z6G10_Z6B10_Z6R10_3PLANE_422_UNORM_3PACK16_EXT
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** ename:VK_FORMAT_Z6G10_Z6B10_Z6R10_3PLANE_444_UNORM_3PACK16_EXT
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** ename:VK_FORMAT_Z4G12_Z4B12_Z4R12_3PLANE_420_UNORM_3PACK16_EXT
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** ename:VK_FORMAT_Z4G12_Z4B12_Z4R12_3PLANE_422_UNORM_3PACK16_EXT
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** ename:VK_FORMAT_Z4G12_Z4B12_Z4R12_3PLANE_444_UNORM_3PACK16_EXT
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** ename:VK_FORMAT_Z2G14_Z2B14_Z2R14_3PLANE_420_UNORM_3PACK16_EXT
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** ename:VK_FORMAT_Z2G14_Z2B14_Z2R14_3PLANE_422_UNORM_3PACK16_EXT
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** ename:VK_FORMAT_Z2G14_Z2B14_Z2R14_3PLANE_444_UNORM_3PACK16_EXT
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:refpage: VkPhysicalDeviceYcbcr3Plane16BitLsbFormatsFeaturesEXT
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include::{chapters}/features.adoc[tag=features]
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include::{generated}/validity/structs/VkPhysicalDeviceYcbcr3Plane16BitLsbFormatsFeaturesEXT.adoc[]
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--
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endif::VK_EXT_ycbcr_3plane_16bit_lsb_formats[]
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ifdef::VK_EXT_color_write_enable[]
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[open,refpage='VkPhysicalDeviceColorWriteEnableFeaturesEXT',desc='Structure describing whether writes to color attachments can be enabled and disabled dynamically',type='structs']
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--

‎chapters/formats.adoc‎

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@@ -1359,6 +1359,161 @@ ifdef::VK_BASE_VERSION_1_3,VK_EXT_ycbcr_2plane_444_formats[]
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ename:VK_IMAGE_ASPECT_PLANE_0_BIT for the G plane, and
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ename:VK_IMAGE_ASPECT_PLANE_1_BIT for the BR plane.
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endif::VK_BASE_VERSION_1_3,VK_EXT_ycbcr_2plane_444_formats[]
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ifdef::VK_EXT_ycbcr_3plane_16bit_lsb_formats[]
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* ename:VK_FORMAT_Z6R10_UNORM_EXT specifies a one-component, 16-bit
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unsigned normalized format that has a single 10-bit R component in the
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bottom 10 bits of a 16-bit word, with the top 6 bits unused and required
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to be set to zero.
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* ename:VK_FORMAT_Z4R12_UNORM_EXT specifies a one-component, 16-bit
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unsigned normalized format that has a single 12-bit R component in the
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bottom 12 bits of a 16-bit word, with the top 4 bits unused and required
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to be set to zero.
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* ename:VK_FORMAT_Z2R14_UNORM_EXT specifies a one-component, 16-bit
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unsigned normalized format that has a single 14-bit R component in the
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bottom 14 bits of a 16-bit word, with the top 2 bits unused and required
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to be set to zero.
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* ename:VK_FORMAT_Z6G10_Z6B10_Z6R10_3PLANE_420_UNORM_3PACK16_EXT specifies an
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unsigned normalized _multi-planar format_ that has a 10-bit G component
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in the bottom 10 bits of each 16-bit word of plane 0, a 10-bit B component
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in the bottom 10 bits of each 16-bit word of plane 1, and a 10-bit R
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component in the bottom 10 bits of each 16-bit word of plane 2, with the
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top 6 bits of each word unused and required to be set to zero.
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The horizontal and vertical dimensions of the R and B planes are halved
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relative to the image dimensions, and each R and B component is shared
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with the G components for which latexmath:[\left\lfloor i_G \times 0.5
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\right\rfloor = i_B = i_R] and latexmath:[\left\lfloor j_G \times 0.5
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\right\rfloor = j_B = j_R].
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The location of each plane when this image is in linear layout can be
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determined via flink:vkGetImageSubresourceLayout, using
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ename:VK_IMAGE_ASPECT_PLANE_0_BIT for the G plane,
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ename:VK_IMAGE_ASPECT_PLANE_1_BIT for the B plane, and
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ename:VK_IMAGE_ASPECT_PLANE_2_BIT for the R plane.
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This format only supports images with a width and height that is a
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multiple of two.
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* ename:VK_FORMAT_Z6G10_Z6B10_Z6R10_3PLANE_422_UNORM_3PACK16_EXT specifies an
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unsigned normalized _multi-planar format_ that has a 10-bit G component
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in the bottom 10 bits of each 16-bit word of plane 0, a 10-bit B component
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in the bottom 10 bits of each 16-bit word of plane 1, and a 10-bit R
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component in the bottom 10 bits of each 16-bit word of plane 2, with the
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top 6 bits of each word unused and required to be set to zero.
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The horizontal dimension of the R and B plane is halved relative to the
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image dimensions, and each R and B value is shared with the G components
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for which latexmath:[\left\lfloor i_G \times 0.5 \right\rfloor = i_B =
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i_R].
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The location of each plane when this image is in linear layout can be
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determined via flink:vkGetImageSubresourceLayout, using
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ename:VK_IMAGE_ASPECT_PLANE_0_BIT for the G plane,
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ename:VK_IMAGE_ASPECT_PLANE_1_BIT for the B plane, and
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ename:VK_IMAGE_ASPECT_PLANE_2_BIT for the R plane.
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This format only supports images with a width that is a multiple of two.
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* ename:VK_FORMAT_Z6G10_Z6B10_Z6R10_3PLANE_444_UNORM_3PACK16_EXT specifies an
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unsigned normalized _multi-planar format_ that has a 10-bit G component
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in the bottom 10 bits of each 16-bit word of plane 0, a 10-bit B component
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in the bottom 10 bits of each 16-bit word of plane 1, and a 10-bit R
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component in the bottom 10 bits of each 16-bit word of plane 2, with the
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top 6 bits of each word unused and required to be set to zero.
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Each plane has the same dimensions and each R, G, and B component
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contributes to a single texel.
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The location of each plane when this image is in linear layout can be
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determined via flink:vkGetImageSubresourceLayout, using
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ename:VK_IMAGE_ASPECT_PLANE_0_BIT for the G plane,
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ename:VK_IMAGE_ASPECT_PLANE_1_BIT for the B plane, and
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ename:VK_IMAGE_ASPECT_PLANE_2_BIT for the R plane.
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* ename:VK_FORMAT_Z4G12_Z4B12_Z4R12_3PLANE_420_UNORM_3PACK16_EXT specifies an
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unsigned normalized _multi-planar format_ that has a 12-bit G component
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in the bottom 12 bits of each 16-bit word of plane 0, a 12-bit B component
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in the bottom 12 bits of each 16-bit word of plane 1, and a 12-bit R
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component in the bottom 12 bits of each 16-bit word of plane 2, with the
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top 4 bits of each word unused and required to be set to zero.
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The horizontal and vertical dimensions of the R and B planes are halved
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relative to the image dimensions, and each R and B component is shared
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with the G components for which latexmath:[\left\lfloor i_G \times 0.5
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\right\rfloor = i_B = i_R] and latexmath:[\left\lfloor j_G \times 0.5
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\right\rfloor = j_B = j_R].
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The location of each plane when this image is in linear layout can be
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determined via flink:vkGetImageSubresourceLayout, using
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ename:VK_IMAGE_ASPECT_PLANE_0_BIT for the G plane,
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ename:VK_IMAGE_ASPECT_PLANE_1_BIT for the B plane, and
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ename:VK_IMAGE_ASPECT_PLANE_2_BIT for the R plane.
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This format only supports images with a width and height that is a
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multiple of two.
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* ename:VK_FORMAT_Z4G12_Z4B12_Z4R12_3PLANE_422_UNORM_3PACK16_EXT specifies an
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unsigned normalized _multi-planar format_ that has a 12-bit G component
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in the bottom 12 bits of each 16-bit word of plane 0, a 12-bit B component
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in the bottom 12 bits of each 16-bit word of plane 1, and a 12-bit R
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component in the bottom 12 bits of each 16-bit word of plane 2, with the
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top 4 bits of each word unused and required to be set to zero.
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The horizontal dimension of the R and B plane is halved relative to the
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image dimensions, and each R and B value is shared with the G components
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for which latexmath:[\left\lfloor i_G \times 0.5 \right\rfloor = i_B =
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i_R].
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The location of each plane when this image is in linear layout can be
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determined via flink:vkGetImageSubresourceLayout, using
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ename:VK_IMAGE_ASPECT_PLANE_0_BIT for the G plane,
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ename:VK_IMAGE_ASPECT_PLANE_1_BIT for the B plane, and
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ename:VK_IMAGE_ASPECT_PLANE_2_BIT for the R plane.
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This format only supports images with a width that is a multiple of two.
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* ename:VK_FORMAT_Z4G12_Z4B12_Z4R12_3PLANE_444_UNORM_3PACK16_EXT specifies an
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unsigned normalized _multi-planar format_ that has a 12-bit G component
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in the bottom 12 bits of each 16-bit word of plane 0, a 12-bit B component
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in the bottom 12 bits of each 16-bit word of plane 1, and a 12-bit R
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component in the bottom 12 bits of each 16-bit word of plane 2, with the
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top 4 bits of each word unused and required to be set to zero.
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Each plane has the same dimensions and each R, G, and B component
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contributes to a single texel.
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The location of each plane when this image is in linear layout can be
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determined via flink:vkGetImageSubresourceLayout, using
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ename:VK_IMAGE_ASPECT_PLANE_0_BIT for the G plane,
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ename:VK_IMAGE_ASPECT_PLANE_1_BIT for the B plane, and
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ename:VK_IMAGE_ASPECT_PLANE_2_BIT for the R plane.
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* ename:VK_FORMAT_Z2G14_Z2B14_Z2R14_3PLANE_420_UNORM_3PACK16_EXT specifies an
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unsigned normalized _multi-planar format_ that has a 14-bit G component
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in the bottom 14 bits of each 16-bit word of plane 0, a 14-bit B component
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in the bottom 14 bits of each 16-bit word of plane 1, and a 14-bit R
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component in the bottom 14 bits of each 16-bit word of plane 2, with the
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top 2 bits of each word unused and required to be set to zero.
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The horizontal and vertical dimensions of the R and B planes are halved
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relative to the image dimensions, and each R and B component is shared
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with the G components for which latexmath:[\left\lfloor i_G \times 0.5
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\right\rfloor = i_B = i_R] and latexmath:[\left\lfloor j_G \times 0.5
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\right\rfloor = j_B = j_R].
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The location of each plane when this image is in linear layout can be
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determined via flink:vkGetImageSubresourceLayout, using
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ename:VK_IMAGE_ASPECT_PLANE_0_BIT for the G plane,
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ename:VK_IMAGE_ASPECT_PLANE_1_BIT for the B plane, and
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ename:VK_IMAGE_ASPECT_PLANE_2_BIT for the R plane.
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This format only supports images with a width and height that is a
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multiple of two.
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* ename:VK_FORMAT_Z2G14_Z2B14_Z2R14_3PLANE_422_UNORM_3PACK16_EXT specifies an
1488+
unsigned normalized _multi-planar format_ that has a 14-bit G component
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in the bottom 14 bits of each 16-bit word of plane 0, a 14-bit B component
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in the bottom 14 bits of each 16-bit word of plane 1, and a 14-bit R
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component in the bottom 14 bits of each 16-bit word of plane 2, with the
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top 2 bits of each word unused and required to be set to zero.
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The horizontal dimension of the R and B plane is halved relative to the
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image dimensions, and each R and B value is shared with the G components
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for which latexmath:[\left\lfloor i_G \times 0.5 \right\rfloor = i_B =
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i_R].
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The location of each plane when this image is in linear layout can be
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determined via flink:vkGetImageSubresourceLayout, using
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ename:VK_IMAGE_ASPECT_PLANE_0_BIT for the G plane,
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ename:VK_IMAGE_ASPECT_PLANE_1_BIT for the B plane, and
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ename:VK_IMAGE_ASPECT_PLANE_2_BIT for the R plane.
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This format only supports images with a width that is a multiple of two.
1503+
* ename:VK_FORMAT_Z2G14_Z2B14_Z2R14_3PLANE_444_UNORM_3PACK16_EXT, specifies an
1504+
unsigned normalized _multi-planar format_ that has a 14-bit G component
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in the bottom 14 bits of each 16-bit word of plane 0, a 14-bit B component
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in the bottom 14 bits of each 16-bit word of plane 1, and a 14-bit R
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component in the bottom 14 bits of each 16-bit word of plane 2, with the
1508+
top 2 bits of each word unused and required to be set to zero.
1509+
Each plane has the same dimensions and each R, G, and B component
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contributes to a single texel.
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The location of each plane when this image is in linear layout can be
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determined via flink:vkGetImageSubresourceLayout, using
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ename:VK_IMAGE_ASPECT_PLANE_0_BIT for the G plane,
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ename:VK_IMAGE_ASPECT_PLANE_1_BIT for the B plane, and
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ename:VK_IMAGE_ASPECT_PLANE_2_BIT for the R plane.
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endif::VK_EXT_ycbcr_3plane_16bit_lsb_formats[]
13621517
ifdef::VK_IMG_format_pvrtc[]
13631518
* ename:VK_FORMAT_PVRTC1_2BPP_UNORM_BLOCK_IMG specifies a four-component,
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PVRTC compressed format where each 64-bit compressed texel block encodes
@@ -2062,9 +2217,9 @@ include::{generated}/api/protos/vkGetPhysicalDeviceFormatProperties.adoc[]
20622217
structure in which physical device properties for pname:format are
20632218
returned.
20642219

2065-
ifdef::VK_EXT_ycbcr_2plane_444_formats[]
20662220
.Valid Usage
20672221
****
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ifdef::VK_EXT_ycbcr_2plane_444_formats[]
20682223
* [[VUID-vkGetPhysicalDeviceFormatProperties-None-12272]]
20692224
If
20702225
ifdef::VK_BASE_VERSION_1_3[Vulkan 1.3 is not supported,]
@@ -2079,8 +2234,24 @@ ifdef::VK_KHR_maintenance5,VK_BASE_VERSION_1_3[and]
20792234
ename:VK_FORMAT_G10X6_B10X6R10X6_2PLANE_444_UNORM_3PACK16,
20802235
ename:VK_FORMAT_G12X4_B12X4R12X4_2PLANE_444_UNORM_3PACK16, or
20812236
ename:VK_FORMAT_G16_B16R16_2PLANE_444_UNORM
2082-
****
20832237
endif::VK_EXT_ycbcr_2plane_444_formats[]
2238+
ifdef::VK_EXT_ycbcr_3plane_16bit_lsb_formats[]
2239+
* If the <<features-ycbcr3plane16BitLsbFormats,pname:ycbcr3plane16BitLsbFormats>>
2240+
feature is not enabled, pname:format must: not be
2241+
ename:VK_FORMAT_Z6R10_UNORM_EXT,
2242+
ename:VK_FORMAT_Z4R12_UNORM_EXT,
2243+
ename:VK_FORMAT_Z2R14_UNORM_EXT,
2244+
ename:VK_FORMAT_Z6G10_Z6B10_Z6R10_3PLANE_420_UNORM_3PACK16_EXT,
2245+
ename:VK_FORMAT_Z6G10_Z6B10_Z6R10_3PLANE_422_UNORM_3PACK16_EXT,
2246+
ename:VK_FORMAT_Z6G10_Z6B10_Z6R10_3PLANE_444_UNORM_3PACK16_EXT,
2247+
ename:VK_FORMAT_Z4G12_Z4B12_Z4R12_3PLANE_420_UNORM_3PACK16_EXT,
2248+
ename:VK_FORMAT_Z4G12_Z4B12_Z4R12_3PLANE_422_UNORM_3PACK16_EXT,
2249+
ename:VK_FORMAT_Z4G12_Z4B12_Z4R12_3PLANE_444_UNORM_3PACK16_EXT,
2250+
ename:VK_FORMAT_Z2G14_Z2B14_Z2R14_3PLANE_420_UNORM_3PACK16_EXT,
2251+
ename:VK_FORMAT_Z2G14_Z2B14_Z2R14_3PLANE_422_UNORM_3PACK16_EXT or
2252+
ename:VK_FORMAT_Z2G14_Z2B14_Z2R14_3PLANE_444_UNORM_3PACK16_EXT
2253+
endif::VK_EXT_ycbcr_3plane_16bit_lsb_formats[]
2254+
****
20842255

20852256
include::{generated}/validity/protos/vkGetPhysicalDeviceFormatProperties.adoc[]
20862257
--
@@ -2427,9 +2598,9 @@ fname:vkGetPhysicalDeviceFormatProperties2 behaves similarly to
24272598
flink:vkGetPhysicalDeviceFormatProperties, with the ability to return
24282599
extended information in a pname:pNext chain of output structures.
24292600

2430-
ifdef::VK_EXT_ycbcr_2plane_444_formats[]
24312601
.Valid Usage
24322602
****
2603+
ifdef::VK_EXT_ycbcr_2plane_444_formats[]
24332604
* [[VUID-vkGetPhysicalDeviceFormatProperties2-None-12273]]
24342605
If
24352606
ifdef::VK_BASE_VERSION_1_3[Vulkan 1.3 is not supported,]
@@ -2444,8 +2615,24 @@ ifdef::VK_KHR_maintenance5,VK_BASE_VERSION_1_3[and]
24442615
ename:VK_FORMAT_G10X6_B10X6R10X6_2PLANE_444_UNORM_3PACK16,
24452616
ename:VK_FORMAT_G12X4_B12X4R12X4_2PLANE_444_UNORM_3PACK16, or
24462617
ename:VK_FORMAT_G16_B16R16_2PLANE_444_UNORM
2447-
****
24482618
endif::VK_EXT_ycbcr_2plane_444_formats[]
2619+
ifdef::VK_EXT_ycbcr_3plane_16bit_lsb_formats[]
2620+
* If the <<features-ycbcr3plane16BitLsbFormats,pname:ycbcr3plane16BitLsbFormats>>
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feature is not enabled, pname:format must: not be
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ename:VK_FORMAT_Z6R10_UNORM_EXT,
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ename:VK_FORMAT_Z4R12_UNORM_EXT,
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ename:VK_FORMAT_Z2R14_UNORM_EXT,
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ename:VK_FORMAT_Z6G10_Z6B10_Z6R10_3PLANE_420_UNORM_3PACK16_EXT,
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ename:VK_FORMAT_Z6G10_Z6B10_Z6R10_3PLANE_422_UNORM_3PACK16_EXT,
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ename:VK_FORMAT_Z6G10_Z6B10_Z6R10_3PLANE_444_UNORM_3PACK16_EXT,
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ename:VK_FORMAT_Z4G12_Z4B12_Z4R12_3PLANE_420_UNORM_3PACK16_EXT,
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ename:VK_FORMAT_Z4G12_Z4B12_Z4R12_3PLANE_422_UNORM_3PACK16_EXT,
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ename:VK_FORMAT_Z4G12_Z4B12_Z4R12_3PLANE_444_UNORM_3PACK16_EXT,
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ename:VK_FORMAT_Z2G14_Z2B14_Z2R14_3PLANE_420_UNORM_3PACK16_EXT,
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ename:VK_FORMAT_Z2G14_Z2B14_Z2R14_3PLANE_422_UNORM_3PACK16_EXT or
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ename:VK_FORMAT_Z2G14_Z2B14_Z2R14_3PLANE_444_UNORM_3PACK16_EXT
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endif::VK_EXT_ycbcr_3plane_16bit_lsb_formats[]
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****
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include::{generated}/validity/protos/vkGetPhysicalDeviceFormatProperties2.adoc[]
24512638
--

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