diff --git a/include/vulkan/vulkan_core.h b/include/vulkan/vulkan_core.h
index ae214099795..27c7ab6a378 100644
--- a/include/vulkan/vulkan_core.h
+++ b/include/vulkan/vulkan_core.h
@@ -43,7 +43,7 @@ extern "C" {
 #define VK_API_VERSION_1_0 VK_MAKE_VERSION(1, 0, 0)// Patch version should always be set to 0
 
 // Version of this file
-#define VK_HEADER_VERSION 148
+#define VK_HEADER_VERSION 149
 
 // Complete version of this file
 #define VK_HEADER_VERSION_COMPLETE VK_MAKE_VERSION(1, 2, VK_HEADER_VERSION)
@@ -591,6 +591,7 @@ typedef enum VkStructureType {
     VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_FRAGMENT_DENSITY_MAP_2_FEATURES_EXT = 1000332000,
     VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_FRAGMENT_DENSITY_MAP_2_PROPERTIES_EXT = 1000332001,
     VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_IMAGE_ROBUSTNESS_FEATURES_EXT = 1000335000,
+    VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_4444_FORMATS_FEATURES_EXT = 1000340000,
     VK_STRUCTURE_TYPE_DIRECTFB_SURFACE_CREATE_INFO_EXT = 1000346000,
     VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_VARIABLE_POINTER_FEATURES = VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_VARIABLE_POINTERS_FEATURES,
     VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_SHADER_DRAW_PARAMETER_FEATURES = VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_SHADER_DRAW_PARAMETERS_FEATURES,
@@ -1057,6 +1058,8 @@ typedef enum VkFormat {
     VK_FORMAT_ASTC_10x10_SFLOAT_BLOCK_EXT = 1000066011,
     VK_FORMAT_ASTC_12x10_SFLOAT_BLOCK_EXT = 1000066012,
     VK_FORMAT_ASTC_12x12_SFLOAT_BLOCK_EXT = 1000066013,
+    VK_FORMAT_A4R4G4B4_UNORM_PACK16_EXT = 1000340000,
+    VK_FORMAT_A4B4G4R4_UNORM_PACK16_EXT = 1000340001,
     VK_FORMAT_G8B8G8R8_422_UNORM_KHR = VK_FORMAT_G8B8G8R8_422_UNORM,
     VK_FORMAT_B8G8R8G8_422_UNORM_KHR = VK_FORMAT_B8G8R8G8_422_UNORM,
     VK_FORMAT_G8_B8_R8_3PLANE_420_UNORM_KHR = VK_FORMAT_G8_B8_R8_3PLANE_420_UNORM,
@@ -10963,6 +10966,18 @@ typedef struct VkPhysicalDeviceImageRobustnessFeaturesEXT {
 } VkPhysicalDeviceImageRobustnessFeaturesEXT;
 
 
+
+#define VK_EXT_4444_formats 1
+#define VK_EXT_4444_FORMATS_SPEC_VERSION  1
+#define VK_EXT_4444_FORMATS_EXTENSION_NAME "VK_EXT_4444_formats"
+typedef struct VkPhysicalDevice4444FormatsFeaturesEXT {
+    VkStructureType    sType;
+    void*              pNext;
+    VkBool32           formatA4R4G4B4;
+    VkBool32           formatA4B4G4R4;
+} VkPhysicalDevice4444FormatsFeaturesEXT;
+
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/src/vulkan/registry/vk.xml b/src/vulkan/registry/vk.xml
index 95cc38cad6c..c9b7fcf90c2 100644
--- a/src/vulkan/registry/vk.xml
+++ b/src/vulkan/registry/vk.xml
@@ -135,7 +135,7 @@ server.
         <type category="define">// Vulkan 1.2 version number
 #define <name>VK_API_VERSION_1_2</name> <type>VK_MAKE_VERSION</type>(1, 2, 0)// Patch version should always be set to 0</type>
         <type category="define">// Version of this file
-#define <name>VK_HEADER_VERSION</name> 148</type>
+#define <name>VK_HEADER_VERSION</name> 149</type>
         <type category="define" requires="VK_HEADER_VERSION">// Complete version of this file
 #define <name>VK_HEADER_VERSION_COMPLETE</name> <type>VK_MAKE_VERSION</type>(1, 2, VK_HEADER_VERSION)</type>
 
@@ -1133,9 +1133,9 @@ typedef void <name>CAMetalLayer</name>;
             <member values="VK_STRUCTURE_TYPE_PIPELINE_VIEWPORT_STATE_CREATE_INFO"><type>VkStructureType</type> <name>sType</name></member>
             <member>const <type>void</type>*            <name>pNext</name></member>
             <member optional="true"><type>VkPipelineViewportStateCreateFlags</type>    <name>flags</name></member>
-            <member><type>uint32_t</type>               <name>viewportCount</name></member>
+            <member optional="true"><type>uint32_t</type>               <name>viewportCount</name></member>
             <member noautovalidity="true" optional="true" len="viewportCount">const <type>VkViewport</type>*      <name>pViewports</name></member>
-            <member><type>uint32_t</type>               <name>scissorCount</name></member>
+            <member optional="true"><type>uint32_t</type>               <name>scissorCount</name></member>
             <member noautovalidity="true" optional="true" len="scissorCount">const <type>VkRect2D</type>*        <name>pScissors</name></member>
         </type>
         <type category="struct" name="VkPipelineRasterizationStateCreateInfo">
@@ -3669,7 +3669,7 @@ typedef void <name>CAMetalLayer</name>;
             <member values="VK_STRUCTURE_TYPE_PIPELINE_VIEWPORT_SHADING_RATE_IMAGE_STATE_CREATE_INFO_NV"><type>VkStructureType</type> <name>sType</name></member>
             <member>const <type>void</type>*                                                             <name>pNext</name></member>
             <member><type>VkBool32</type>                                                                <name>shadingRateImageEnable</name></member>
-            <member noautovalidity="true"><type>uint32_t</type>                                          <name>viewportCount</name></member>
+            <member><type>uint32_t</type>                                                <name>viewportCount</name></member>
             <member noautovalidity="true" len="viewportCount">const <type>VkShadingRatePaletteNV</type>* <name>pShadingRatePalettes</name></member>
         </type>
         <type category="struct" name="VkPhysicalDeviceShadingRateImageFeaturesNV" structextends="VkPhysicalDeviceFeatures2,VkDeviceCreateInfo">
@@ -4855,6 +4855,12 @@ typedef void <name>CAMetalLayer</name>;
             <member noautovalidity="true"><type>void</type>*        <name>pNext</name></member>
             <member><type>VkBool32</type>                           <name>robustImageAccess</name></member>
         </type>
+        <type category="struct" name="VkPhysicalDevice4444FormatsFeaturesEXT" structextends="VkPhysicalDeviceFeatures2,VkDeviceCreateInfo">
+            <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_4444_FORMATS_FEATURES_EXT"><type>VkStructureType</type> <name>sType</name></member>
+            <member noautovalidity="true"><type>void</type>*        <name>pNext</name></member>
+            <member><type>VkBool32</type>                           <name>formatA4R4G4B4</name></member>
+            <member><type>VkBool32</type>                           <name>formatA4B4G4R4</name></member>
+        </type>
     </types>
 
     <comment>Vulkan enumerant (token) definitions</comment>
@@ -13839,10 +13845,14 @@ typedef void <name>CAMetalLayer</name>;
                 <enum value="&quot;VK_EXT_extension_340&quot;"              name="VK_EXT_EXTENSION_340_EXTENSION_NAME"/>
             </require>
         </extension>
-        <extension name="VK_EXT_extension_341" number="341" author="EXT" contact="Joshua Ashton @Joshua-Ashton" supported="disabled">
+        <extension name="VK_EXT_4444_formats" number="341" type="device" requires="VK_KHR_get_physical_device_properties2" author="EXT" contact="Joshua Ashton @Joshua-Ashton" supported="vulkan">
             <require>
-                <enum value="0"                                             name="VK_EXT_EXTENSION_341_SPEC_VERSION"/>
-                <enum value="&quot;VK_EXT_extension_341&quot;"              name="VK_EXT_EXTENSION_341_EXTENSION_NAME"/>
+                <enum value="1"                                             name="VK_EXT_4444_FORMATS_SPEC_VERSION"/>
+                <enum value="&quot;VK_EXT_4444_formats&quot;"               name="VK_EXT_4444_FORMATS_EXTENSION_NAME"/>
+                <enum offset="0" extends="VkStructureType"                  name="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_4444_FORMATS_FEATURES_EXT"/>
+                <enum offset="0" extends="VkFormat"                         name="VK_FORMAT_A4R4G4B4_UNORM_PACK16_EXT"/>
+                <enum offset="1" extends="VkFormat"                         name="VK_FORMAT_A4B4G4R4_UNORM_PACK16_EXT"/>
+                <type name="VkPhysicalDevice4444FormatsFeaturesEXT"/>
             </require>
         </extension>
         <extension name="VK_EXT_extension_342" number="342" author="EXT" contact="Ralph Potter gitlab:@r_potter" supported="disabled">
@@ -13904,5 +13914,17 @@ typedef void <name>CAMetalLayer</name>;
                 <enum value="&quot;VK_KHR_extension_350&quot;"              name="VK_KHR_EXTENSION_350_EXTENSION_NAME"/>
             </require>
         </extension>
+        <extension name="VK_NV_extension_351" number="351" author="NV" contact="Liam Middlebrook @liam-middlebrook" supported="disabled">
+            <require>
+                <enum value="0"                                             name="VK_NV_EXTENSION_351_SPEC_VERSION"/>
+                <enum value="&quot;VK_NV_extension_351&quot;"               name="VK_NV_EXTENSION_351_EXTENSION_NAME"/>
+            </require>
+        </extension>
+        <extension name="VK_EXT_extension_352" number="352" author="EXT" contact="Joshua Ashton @Joshua-Ashton" supported="disabled">
+            <require>
+                <enum value="0"                                             name="VK_EXT_EXTENSION_352_SPEC_VERSION"/>
+                <enum value="&quot;VK_EXT_extension_352&quot;"              name="VK_EXT_EXTENSION_352_EXTENSION_NAME"/>
+            </require>
+        </extension>
     </extensions>
 </registry>