Add VK_EXT_ycbcr_3plane_16bit_lsb_formats extension

appendices/VK_EXT_ycbcr_3plane_16bit_lsb_formats.adoc

@@ -0,0 +1,27 @@
+// Copyright 2020-2025 The Khronos Group Inc.
+//
+// SPDX-License-Identifier: CC-BY-4.0
+
+include::{generated}/meta/{refprefix}VK_EXT_ycbcr_3plane_16bit_lsb_formats.adoc[]
+
+=== Other Extension Metadata
+
+*Last Modified Date*::
+    2025-04-01
+*IP Status*::
+    No known IP claims.
+*Contributors*::
+  - Robert Mader, Collabora
+
+=== Description
+
+This extension adds some {YCbCr} formats that are in common use for video
+software encode and decode, but were not part of the
+`apiext:VK_KHR_sampler_ycbcr_conversion` extension.
+
+include::{generated}/interfaces/VK_EXT_ycbcr_3plane_16bit_lsb_formats.adoc[]
+
+=== Version History
+
+  * Revision 1, 2025-04-01 (Robert Mader)
+  ** Initial draft

chapters/descriptorbuffers.adoc

@@ -596,6 +596,17 @@ ifdef::VK_BASE_VERSION_1_3[Vulkan 1.3 is not supported and]
     ename:VK_FORMAT_G12X4_B12X4R12X4_2PLANE_444_UNORM_3PACK16, or
     ename:VK_FORMAT_G16_B16R16_2PLANE_444_UNORM
 endif::VK_EXT_ycbcr_2plane_444_formats[]
+ifdef::VK_EXT_ycbcr_3plane_16bit_lsb_formats[]
+  * [[VUID-VkDescriptorAddressInfoEXT-None-?????]]
+    If the <<features-ycbcr3plane16BitLsbFormats,pname:ycbcr3plane16BitLsbFormats>>
+    feature is not enabled, pname:format must: not be
+    ename:VK_FORMAT_X6G10_X6B10_X6R10_3PLANE_420_UNORM_3PACK16,
+    ename:VK_FORMAT_X6G10_X6B10_X6R10_3PLANE_422_UNORM_3PACK16,
+    ename:VK_FORMAT_X6G10_X6B10_X6R10_3PLANE_444_UNORM_3PACK16,
+    ename:VK_FORMAT_X4G12_X4B12_X4R12_3PLANE_420_UNORM_3PACK16,
+    ename:VK_FORMAT_X4G12_X4B12_X4R12_3PLANE_422_UNORM_3PACK16 or
+    ename:VK_FORMAT_X4G12_X4B12_X4R12_3PLANE_444_UNORM_3PACK16
+endif::VK_EXT_ycbcr_3plane_16bit_lsb_formats[]
 ****
 
 include::{generated}/validity/structs/VkDescriptorAddressInfoEXT.adoc[]

chapters/features.adoc

@@ -6033,6 +6033,36 @@ endif::VK_BASE_VERSION_1_3[]
 --
 endif::VK_EXT_ycbcr_2plane_444_formats[]
 
+ifdef::VK_EXT_ycbcr_3plane_16bit_lsb_formats[]
+[open,refpage='VkPhysicalDeviceYcbcr3Plane16BitLsbFormatsFeaturesEXT',desc='Structure describing whether the implementation supports additional 3-plane 16bit LSB {YCbCr} formats',type='structs']
+--
+The sname:VkPhysicalDeviceYcbcr3Plane16BitLsbFormatsFeaturesEXT structure is
+defined as:
+
+include::{generated}/api/structs/VkPhysicalDeviceYcbcr3Plane16BitLsbFormatsFeaturesEXT.adoc[]
+
+This structure describes the following feature:
+
+  * pname:sType is a elink:VkStructureType value identifying this structure.
+  * pname:pNext is `NULL` or a pointer to a structure extending this
+    structure.
+  * [[features-ycbcr3plane16BitLsbFormats]] pname:ycbcr3plane16BitLsbFormats
+    indicates that the implementation supports the following 3-plane 16bit LSB
+    {YCbCr} formats:
+  ** ename:VK_FORMAT_X6G10_X6B10_X6R10_3PLANE_420_UNORM_3PACK16
+  ** ename:VK_FORMAT_X6G10_X6B10_X6R10_3PLANE_422_UNORM_3PACK16
+  ** ename:VK_FORMAT_X6G10_X6B10_X6R10_3PLANE_444_UNORM_3PACK16
+  ** ename:VK_FORMAT_X4G12_X4B12_X4R12_3PLANE_420_UNORM_3PACK16
+  ** ename:VK_FORMAT_X4G12_X4B12_X4R12_3PLANE_422_UNORM_3PACK16
+  ** ename:VK_FORMAT_X4G12_X4B12_X4R12_3PLANE_444_UNORM_3PACK16
+
+:refpage: VkPhysicalDeviceYcbcr3Plane16BitLsbFormatsFeaturesEXT
+include::{chapters}/features.adoc[tag=features]
+
+include::{generated}/validity/structs/VkPhysicalDeviceYcbcr3Plane16BitLsbFormatsFeaturesEXT.adoc[]
+--
+endif::VK_EXT_ycbcr_3plane_16bit_lsb_formats[]
+
 ifdef::VK_EXT_color_write_enable[]
 [open,refpage='VkPhysicalDeviceColorWriteEnableFeaturesEXT',desc='Structure describing whether writes to color attachments can be enabled and disabled dynamically',type='structs']
 --

chapters/formats.adoc

@@ -2081,6 +2081,17 @@ ifdef::VK_KHR_maintenance5,VK_BASE_VERSION_1_3[and]
     ename:VK_FORMAT_G16_B16R16_2PLANE_444_UNORM
 ****
 endif::VK_EXT_ycbcr_2plane_444_formats[]
+ifdef::VK_EXT_ycbcr_3plane_16bit_lsb_formats[]
+  * [[VUID-vkGetPhysicalDeviceFormatProperties-None-?????]]
+    If the <<features-ycbcr3plane16BitLsbFormats,pname:ycbcr3plane16BitLsbFormats>>
+    feature is not enabled, pname:format must: not be
+    ename:VK_FORMAT_X6G10_X6B10_X6R10_3PLANE_420_UNORM_3PACK16,
+    ename:VK_FORMAT_X6G10_X6B10_X6R10_3PLANE_422_UNORM_3PACK16,
+    ename:VK_FORMAT_X6G10_X6B10_X6R10_3PLANE_444_UNORM_3PACK16,
+    ename:VK_FORMAT_X4G12_X4B12_X4R12_3PLANE_420_UNORM_3PACK16,
+    ename:VK_FORMAT_X4G12_X4B12_X4R12_3PLANE_422_UNORM_3PACK16 or
+    ename:VK_FORMAT_X4G12_X4B12_X4R12_3PLANE_444_UNORM_3PACK16
+endif::VK_EXT_ycbcr_3plane_16bit_lsb_formats[]
 
 include::{generated}/validity/protos/vkGetPhysicalDeviceFormatProperties.adoc[]
 --
@@ -2447,6 +2458,17 @@ ifdef::VK_KHR_maintenance5,VK_BASE_VERSION_1_3[and]
     ename:VK_FORMAT_G16_B16R16_2PLANE_444_UNORM
 ****
 endif::VK_EXT_ycbcr_2plane_444_formats[]
+ifdef::VK_EXT_ycbcr_3plane_16bit_lsb_formats[]
+  * [[VUID-vkGetPhysicalDeviceFormatProperties2-None-?????]]
+    If the <<features-ycbcr3plane16BitLsbFormats,pname:ycbcr3plane16BitLsbFormats>>
+    feature is not enabled, pname:format must: not be
+    ename:VK_FORMAT_X6G10_X6B10_X6R10_3PLANE_420_UNORM_3PACK16,
+    ename:VK_FORMAT_X6G10_X6B10_X6R10_3PLANE_422_UNORM_3PACK16,
+    ename:VK_FORMAT_X6G10_X6B10_X6R10_3PLANE_444_UNORM_3PACK16,
+    ename:VK_FORMAT_X4G12_X4B12_X4R12_3PLANE_420_UNORM_3PACK16,
+    ename:VK_FORMAT_X4G12_X4B12_X4R12_3PLANE_422_UNORM_3PACK16 or
+    ename:VK_FORMAT_X4G12_X4B12_X4R12_3PLANE_444_UNORM_3PACK16
+endif::VK_EXT_ycbcr_3plane_16bit_lsb_formats[]
 
 include::{generated}/validity/protos/vkGetPhysicalDeviceFormatProperties2.adoc[]
 --

chapters/resources.adoc

@@ -1323,6 +1323,17 @@ ifdef::VK_BASE_VERSION_1_3[Vulkan 1.3 is not supported and]
     ename:VK_FORMAT_G12X4_B12X4R12X4_2PLANE_444_UNORM_3PACK16, or
     ename:VK_FORMAT_G16_B16R16_2PLANE_444_UNORM
 endif::VK_EXT_ycbcr_2plane_444_formats[]
+ifdef::VK_EXT_ycbcr_3plane_16bit_lsb_formats[]
+  * [[VUID-VkBufferViewCreateInfo-None-?????]]
+    If the <<features-ycbcr3plane16BitLsbFormats,pname:ycbcr3plane16BitLsbFormats>>
+    feature is not enabled, pname:format must: not be
+    ename:VK_FORMAT_X6G10_X6B10_X6R10_3PLANE_420_UNORM_3PACK16,
+    ename:VK_FORMAT_X6G10_X6B10_X6R10_3PLANE_422_UNORM_3PACK16,
+    ename:VK_FORMAT_X6G10_X6B10_X6R10_3PLANE_444_UNORM_3PACK16,
+    ename:VK_FORMAT_X4G12_X4B12_X4R12_3PLANE_420_UNORM_3PACK16,
+    ename:VK_FORMAT_X4G12_X4B12_X4R12_3PLANE_422_UNORM_3PACK16 or
+    ename:VK_FORMAT_X4G12_X4B12_X4R12_3PLANE_444_UNORM_3PACK16
+endif::VK_EXT_ycbcr_3plane_16bit_lsb_formats[]
 ****
 
 include::{generated}/validity/structs/VkBufferViewCreateInfo.adoc[]
@@ -3067,6 +3078,17 @@ ifdef::VK_BASE_VERSION_1_3[Vulkan 1.3 is not supported and]
     ename:VK_FORMAT_G12X4_B12X4R12X4_2PLANE_444_UNORM_3PACK16, or
     ename:VK_FORMAT_G16_B16R16_2PLANE_444_UNORM
 endif::VK_EXT_ycbcr_2plane_444_formats[]
+ifdef::VK_EXT_ycbcr_3plane_16bit_lsb_formats[]
+  * [[VUID-VkImageCreateInfo-None-?????]]
+    If the <<features-ycbcr3plane16BitLsbFormats,pname:ycbcr3plane16BitLsbFormats>>
+    feature is not enabled, pname:format must: not be
+    ename:VK_FORMAT_X6G10_X6B10_X6R10_3PLANE_420_UNORM_3PACK16,
+    ename:VK_FORMAT_X6G10_X6B10_X6R10_3PLANE_422_UNORM_3PACK16,
+    ename:VK_FORMAT_X6G10_X6B10_X6R10_3PLANE_444_UNORM_3PACK16,
+    ename:VK_FORMAT_X4G12_X4B12_X4R12_3PLANE_420_UNORM_3PACK16,
+    ename:VK_FORMAT_X4G12_X4B12_X4R12_3PLANE_422_UNORM_3PACK16 or
+    ename:VK_FORMAT_X4G12_X4B12_X4R12_3PLANE_444_UNORM_3PACK16
+endif::VK_EXT_ycbcr_3plane_16bit_lsb_formats[]
 ifdef::VK_EXT_descriptor_heap[]
   * [[VUID-VkImageCreateInfo-flags-11281]]
     If slink:VkOpaqueCaptureDataCreateInfoEXT::pData is not `NULL`,
@@ -6732,6 +6754,17 @@ ifdef::VK_BASE_VERSION_1_3[Vulkan 1.3 is not supported and]
     ename:VK_FORMAT_G12X4_B12X4R12X4_2PLANE_444_UNORM_3PACK16, or
     ename:VK_FORMAT_G16_B16R16_2PLANE_444_UNORM
 endif::VK_EXT_ycbcr_2plane_444_formats[]
+ifdef::VK_EXT_ycbcr_3plane_16bit_lsb_formats[]
+  * [[VUID-VkImageViewCreateInfo-None-?????]]
+    If the <<features-ycbcr3plane16BitLsbFormats,pname:ycbcr3plane16BitLsbFormats>>
+    feature is not enabled, pname:format must: not be
+    ename:VK_FORMAT_X6G10_X6B10_X6R10_3PLANE_420_UNORM_3PACK16,
+    ename:VK_FORMAT_X6G10_X6B10_X6R10_3PLANE_422_UNORM_3PACK16,
+    ename:VK_FORMAT_X6G10_X6B10_X6R10_3PLANE_444_UNORM_3PACK16,
+    ename:VK_FORMAT_X4G12_X4B12_X4R12_3PLANE_420_UNORM_3PACK16,
+    ename:VK_FORMAT_X4G12_X4B12_X4R12_3PLANE_422_UNORM_3PACK16 or
+    ename:VK_FORMAT_X4G12_X4B12_X4R12_3PLANE_444_UNORM_3PACK16
+endif::VK_EXT_ycbcr_3plane_16bit_lsb_formats[]
 ****
 
 include::{generated}/validity/structs/VkImageViewCreateInfo.adoc[]

proposals/VK_EXT_ycbcr_3plane_16bit_lsb_formats.adoc

@@ -0,0 +1,39 @@
+// Copyright 2022-2025 The Khronos Group Inc.
+//
+// SPDX-License-Identifier: CC-BY-4.0
+
+= VK_EXT_ycbcr_3plane_16bit_lsb_formats
+:toc: left
+:docs: https://docs.vulkan.org/spec/latest/
+:extensions: {docs}appendices/extensions.html#
+:sectnums:
+
+This extension adds support for 10/12bit {YCbCr} formats used by software
+decoders like ffmpeg, dav1d and libvpx.
+
+== Problem Statement
+
+Many popular software video decoders - such as ffmpeg/libav, dav1d and libvpx -
+use formats for 10 and 12 bit content that are not yet supported in Vulkan, but
+are for example in Linux DRM and Mesa GLES. These formats long established and
+optimized for the given task and it would be very hard for decoders to switch
+to formats optimized for hardware video decoders such as P010.
+
+Supporting these formats directly in drivers has various advantages for apps
+and system compositors, as it allows to avoid unnecessary copies and/or quality
+loss. Further more it can also simplify code-sharing with code-paths for
+hardware decoders.
+
+Unfortunately it is not possible to use the existing 16 bit formats such as
+VK_FORMAT_G16_B16_R16_3PLANE_420_UNORM as - unlike most formats used by hardware
+decoders - the alignment is LSB, not MSB. The bit-values thus need to get
+shifted by 6 or 4 bit.
+
+== Proposal
+
+Add the formats in question. For any drivers already supporting YCbCr formats
+via shaders this should be straight forward. Values in the 0.0 - 1.0 range just
+need to get multiplied by 65535.0 / 1023.0 (for 10 bit) or 65535.0 / 4095.0 (for
+12 bit).
+
+== Issues

xml/vk.xml

@@ -8554,6 +8554,11 @@ typedef void* <name>MTLSharedEvent_id</name>;
             <member optional="true"><type>void</type>*        <name>pNext</name></member>
             <member><type>VkBool32</type>                     <name>ycbcr2plane444Formats</name></member>
         </type>
+        <type category="struct" name="VkPhysicalDeviceYcbcr3Plane16BitLsbFormatsFeaturesEXT" structextends="VkPhysicalDeviceFeatures2,VkDeviceCreateInfo">
+            <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_YCBCR_3_PLANE_16BIT_LSB_FORMATS_FEATURES_EXT"><type>VkStructureType</type> <name>sType</name></member>
+            <member optional="true"><type>void</type>*        <name>pNext</name></member>
+            <member><type>VkBool32</type>                     <name>ycbcr3plane16BitLsbFormats</name></member>
+        </type>
         <type category="struct" name="VkPhysicalDeviceProvokingVertexFeaturesEXT" structextends="VkPhysicalDeviceFeatures2,VkDeviceCreateInfo">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_PROVOKING_VERTEX_FEATURES_EXT"><type>VkStructureType</type> <name>sType</name></member>
             <member optional="true" noautovalidity="true"><type>void</type>*        <name>pNext</name></member>
@@ -30541,10 +30546,19 @@ endif::VK_KHR_internally_synchronized_queues[]
                 <enum value="&quot;VK_KHR_extension_625&quot;"              name="VK_KHR_EXTENSION_625_EXTENSION_NAME"/>
             </require>
         </extension>
-        <extension name="VK_EXT_extension_626" number="626" author="EXT" contact="Robert Mader @rmader" supported="disabled">
+        <extension name="VK_EXT_ycbcr_3plane_16bit_lsb_formats" number="626" type="device" depends="VK_KHR_sampler_ycbcr_conversion,VK_VERSION_1_1" author="EXT" contact="Robert Mader @rmader" supported="vulkan">
             <require>
-                <enum value="0"                                             name="VK_EXT_EXTENSION_626_SPEC_VERSION"/>
-                <enum value="&quot;VK_EXT_extension_626&quot;"              name="VK_EXT_EXTENSION_626_EXTENSION_NAME"/>
+                <enum value="1"                                                 name="VK_EXT_YCBCR_3_PLANE_16BIT_LSB_FORMATS_SPEC_VERSION"/>
+                <enum value="&quot;VK_EXT_ycbcr_3plane_16bit_lsb_formats&quot;" name="VK_EXT_YCBCR_3_PLANE_16BIT_LSB_FORMATS_EXTENSION_NAME"/>
+                <enum offset="0" extends="VkStructureType"                      name="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_YCBCR_3_PLANE_16BIT_LSB_FORMATS_FEATURES_EXT"/>
+                <enum offset="1" extends="VkFormat"                             name="VK_FORMAT_X6G10_X6B10_X6R10_3PLANE_420_UNORM_3PACK16"/>
+                <enum offset="2" extends="VkFormat"                             name="VK_FORMAT_X6G10_X6B10_X6R10_3PLANE_422_UNORM_3PACK16"/>
+                <enum offset="3" extends="VkFormat"                             name="VK_FORMAT_X6G10_X6B10_X6R10_3PLANE_444_UNORM_3PACK16"/>
+                <enum offset="4" extends="VkFormat"                             name="VK_FORMAT_X4G12_X4B12_X4R12_3PLANE_420_UNORM_3PACK16"/>
+                <enum offset="5" extends="VkFormat"                             name="VK_FORMAT_X4G12_X4B12_X4R12_3PLANE_422_UNORM_3PACK16"/>
+                <enum offset="6" extends="VkFormat"                             name="VK_FORMAT_X4G12_X4B12_X4R12_3PLANE_444_UNORM_3PACK16"/>
+                <type name="VkPhysicalDeviceYcbcr3Plane16BitLsbFormatsFeaturesEXT"/>
+                <feature name="ycbcr3plane16BitLsbFormats" struct="VkPhysicalDeviceYcbcr3Plane16BitLsbFormatsFeaturesEXT"/>
             </require>
         </extension>
         <extension name="VK_NV_extension_627" number="627" author="NV" contact="Jeff Juliano @jjuliano" supported="disabled">
@@ -32645,6 +32659,54 @@ endif::VK_KHR_internally_synchronized_queues[]
         <format name="VK_FORMAT_R8_SFLOAT_FPENCODING_FLOAT8E5M2_ARM" class="8-bit" blockSize="1" texelsPerBlock="1">
             <component name="R" bits="8" numericFormat="SFLOAT"/>
         </format>
+        <format name="VK_FORMAT_X6G10_X6B10_X6R10_3PLANE_420_UNORM_3PACK16" class="10-bit 3-plane LSB" blockSize="6" texelsPerBlock="1" chroma="420">
+            <component name="G" bits="16" numericFormat="UNORM" planeIndex="0"/>
+            <component name="B" bits="16" numericFormat="UNORM" planeIndex="1"/>
+            <component name="R" bits="16" numericFormat="UNORM" planeIndex="2"/>
+            <plane index="0" widthDivisor="1" heightDivisor="1" compatible="VK_FORMAT_R16_UNORM"/>
+            <plane index="1" widthDivisor="2" heightDivisor="2" compatible="VK_FORMAT_R16_UNORM"/>
+            <plane index="2" widthDivisor="2" heightDivisor="2" compatible="VK_FORMAT_R16_UNORM"/>
+        </format>
+        <format name="VK_FORMAT_X6G10_X6B10_X6R10_3PLANE_422_UNORM_3PACK16" class="10-bit 3-plane LSB" blockSize="6" texelsPerBlock="1" chroma="422">
+            <component name="G" bits="16" numericFormat="UNORM" planeIndex="0"/>
+            <component name="B" bits="16" numericFormat="UNORM" planeIndex="1"/>
+            <component name="R" bits="16" numericFormat="UNORM" planeIndex="2"/>
+            <plane index="0" widthDivisor="1" heightDivisor="1" compatible="VK_FORMAT_R16_UNORM"/>
+            <plane index="1" widthDivisor="2" heightDivisor="1" compatible="VK_FORMAT_R16_UNORM"/>
+            <plane index="2" widthDivisor="2" heightDivisor="1" compatible="VK_FORMAT_R16_UNORM"/>
+        </format>
+        <format name="VK_FORMAT_X6G10_X6B10_X6R10_3PLANE_444_UNORM_3PACK16" class="10-bit 3-plane LSB" blockSize="6" texelsPerBlock="1" chroma="444">
+            <component name="G" bits="16" numericFormat="UNORM" planeIndex="0"/>
+            <component name="B" bits="16" numericFormat="UNORM" planeIndex="1"/>
+            <component name="R" bits="16" numericFormat="UNORM" planeIndex="2"/>
+            <plane index="0" widthDivisor="1" heightDivisor="1" compatible="VK_FORMAT_R16_UNORM"/>
+            <plane index="1" widthDivisor="1" heightDivisor="1" compatible="VK_FORMAT_R16_UNORM"/>
+            <plane index="2" widthDivisor="1" heightDivisor="1" compatible="VK_FORMAT_R16_UNORM"/>
+        </format>
+        <format name="VK_FORMAT_X4G12_X4B12_X4R12_3PLANE_420_UNORM_3PACK16" class="12-bit 3-plane LSB" blockSize="6" texelsPerBlock="1" chroma="420">
+            <component name="G" bits="16" numericFormat="UNORM" planeIndex="0"/>
+            <component name="B" bits="16" numericFormat="UNORM" planeIndex="1"/>
+            <component name="R" bits="16" numericFormat="UNORM" planeIndex="2"/>
+            <plane index="0" widthDivisor="1" heightDivisor="1" compatible="VK_FORMAT_R16_UNORM"/>
+            <plane index="1" widthDivisor="2" heightDivisor="2" compatible="VK_FORMAT_R16_UNORM"/>
+            <plane index="2" widthDivisor="2" heightDivisor="2" compatible="VK_FORMAT_R16_UNORM"/>
+        </format>
+        <format name="VK_FORMAT_X4G12_X4B12_X4R12_3PLANE_422_UNORM_3PACK16" class="12-bit 3-plane LSB" blockSize="6" texelsPerBlock="1" chroma="422">
+            <component name="G" bits="16" numericFormat="UNORM" planeIndex="0"/>
+            <component name="B" bits="16" numericFormat="UNORM" planeIndex="1"/>
+            <component name="R" bits="16" numericFormat="UNORM" planeIndex="2"/>
+            <plane index="0" widthDivisor="1" heightDivisor="1" compatible="VK_FORMAT_R16_UNORM"/>
+            <plane index="1" widthDivisor="2" heightDivisor="1" compatible="VK_FORMAT_R16_UNORM"/>
+            <plane index="2" widthDivisor="2" heightDivisor="1" compatible="VK_FORMAT_R16_UNORM"/>
+        </format>
+        <format name="VK_FORMAT_X4G12_X4B12_X4R12_3PLANE_444_UNORM_3PACK16" class="12-bit 3-plane LSB" blockSize="6" texelsPerBlock="1" chroma="444">
+            <component name="G" bits="16" numericFormat="UNORM" planeIndex="0"/>
+            <component name="B" bits="16" numericFormat="UNORM" planeIndex="1"/>
+            <component name="R" bits="16" numericFormat="UNORM" planeIndex="2"/>
+            <plane index="0" widthDivisor="1" heightDivisor="1" compatible="VK_FORMAT_R16_UNORM"/>
+            <plane index="1" widthDivisor="1" heightDivisor="1" compatible="VK_FORMAT_R16_UNORM"/>
+            <plane index="2" widthDivisor="1" heightDivisor="1" compatible="VK_FORMAT_R16_UNORM"/>
+        </format>
     </formats>
     <spirvextensions comment="SPIR-V Extensions allowed in Vulkan and what is required to use it">
         <spirvextension name="SPV_KHR_variable_pointers">