Vulkan Version 1.2 promoted a number of key extensions into the core API:

All differences in behavior between these extensions and the corresponding Vulkan 1.2 functionality are summarized below.

Differences Relative to `VK_KHR_8bit_storage`

If the VK_KHR_8bit_storage extension is not supported, support for the SPIR-V storageBuffer8BitAccess capability in shader modules is optional. Support for this feature is defined by VkPhysicalDeviceVulkan12Features::storageBuffer8BitAccess when queried via vkGetPhysicalDeviceFeatures2.

Differences Relative to `VK_KHR_draw_indirect_count`

If the VK_KHR_draw_indirect_count extension is not supported, support for the commands vkCmdDrawIndirectCount and vkCmdDrawIndexedIndirectCount is optional. Support for this feature is defined by VkPhysicalDeviceVulkan12Features::drawIndirectCount when queried via vkGetPhysicalDeviceFeatures2.

Differences Relative to `VK_KHR_sampler_mirror_clamp_to_edge`

If the VK_KHR_sampler_mirror_clamp_to_edge extension is not supported, support for the VkSamplerAddressMode

VK_SAMPLER_ADDRESS_MODE_MIRROR_CLAMP_TO_EDGE is optional. Support for this feature is defined by VkPhysicalDeviceVulkan12Features::samplerMirrorClampToEdge when queried via vkGetPhysicalDeviceFeatures2.

Differences Relative to `VK_EXT_descriptor_indexing`

If the VK_EXT_descriptor_indexing extension is not supported, support for the descriptorIndexing feature is optional. Support for this feature is defined by VkPhysicalDeviceVulkan12Features::descriptorIndexing when queried via vkGetPhysicalDeviceFeatures2.

Differences Relative to `VK_EXT_scalar_block_layout`

If the VK_EXT_scalar_block_layout extension is not supported, support for the scalarBlockLayout feature is optional. Support for this feature is defined by VkPhysicalDeviceVulkan12Features::scalarBlockLayout when queried via vkGetPhysicalDeviceFeatures2.

Differences Relative to `VK_EXT_shader_viewport_index_layer`

The ShaderViewportIndexLayerEXT SPIR-V capability was replaced with the ShaderViewportIndex and ShaderLayer capabilities. Declaring both is equivalent to declaring ShaderViewportIndexLayerEXT. If the VK_EXT_shader_viewport_index_layer extension is not supported, support for the ShaderViewportIndexLayerEXT SPIR-V capability is optional. Support for this feature is defined by VkPhysicalDeviceVulkan12Features::shaderOutputViewportIndex and VkPhysicalDeviceVulkan12Features::shaderOutputLayer when queried via vkGetPhysicalDeviceFeatures2.

Differences Relative to `VK_KHR_buffer_device_address`

If the VK_KHR_buffer_device_address extension is not supported, support for the bufferDeviceAddress feature is optional. Support for this feature is defined by VkPhysicalDeviceVulkan12Features::bufferDeviceAddress when queried via vkGetPhysicalDeviceFeatures2.

Differences Relative to `VK_KHR_shader_atomic_int64`

If the VK_KHR_shader_atomic_int64 extension is not supported, support for the shaderBufferInt64Atomics feature is optional. Support for this feature is defined by VkPhysicalDeviceVulkan12Features::shaderBufferInt64Atomics when queried via vkGetPhysicalDeviceFeatures2.

Differences Relative to `VK_KHR_shader_float16_int8`

If the VK_KHR_shader_float16_int8 extension is not supported, support for the shaderFloat16 and shaderInt8 features is optional. Support for these features are defined by VkPhysicalDeviceVulkan12Features::shaderFloat16 and VkPhysicalDeviceVulkan12Features::shaderInt8 when queried via vkGetPhysicalDeviceFeatures2.

Differences Relative to `VK_KHR_vulkan_memory_model`

If the VK_KHR_vulkan_memory_model extension is not supported, support for the vulkanMemoryModel feature is optional. Support for this feature is defined by VkPhysicalDeviceVulkan12Features::vulkanMemoryModel when queried via vkGetPhysicalDeviceFeatures2.

Additional Vulkan 1.2 Feature Support

[[versions-1.2-new-features]] In addition to the promoted extensions described above, Vulkan 1.2 added support for:

* SPIR-V version 1.4. * SPIR-V version 1.5. * The <<features-samplerMirrorClampToEdge, pname:samplerMirrorClampToEdge>> feature which indicates whether the implementation supports the ename:VK_SAMPLER_ADDRESS_MODE_MIRROR_CLAMP_TO_EDGE sampler address mode. * The <<spirvenv-capabilities-table-ShaderNonUniform, code:ShaderNonUniform>> capability in SPIR-V version 1.5. * The <<features-shaderOutputViewportIndex, pname:shaderOutputViewportIndex>> feature which indicates that the <<spirvenv-capabilities-table-ShaderViewportIndex, code:ShaderViewportIndex>> capability can be used. * The <<features-shaderOutputLayer, pname:shaderOutputLayer>> feature which indicates that the <<spirvenv-capabilities-table-ShaderLayer, code:ShaderLayer>> capability can be used. * The <<features-subgroupBroadcastDynamicId, pname:subgroupBroadcastDynamicId>> feature which allows the "Id" operand of code:OpGroupNonUniformBroadcast to be dynamically uniform within a subgroup, and the "Index" operand of code:OpGroupNonUniformQuadBroadcast to be dynamically uniform within a derivative group, in shader modules of version 1.5 or higher. * The <<features-drawIndirectCount, pname:drawIndirectCount>> feature which indicates whether the flink:vkCmdDrawIndirectCount and flink:vkCmdDrawIndexedIndirectCount functions can be used. * The <<features-descriptorIndexing, pname:descriptorIndexing>> feature which indicates the implementation supports the minimum number of descriptor indexing features as defined in the <<features-requirements, Feature Requirements>> section. * The <<features-samplerFilterMinmax, pname:samplerFilterMinmax>> feature which indicates whether the implementation supports the minimum number of image formats that support the ename:VK_FORMAT_FEATURE_SAMPLED_IMAGE_FILTER_MINMAX_BIT feature bit as defined by the <<limits-filterMinmaxSingleComponentFormats-minimum-requirements, pname:filterMinmaxSingleComponentFormats>> property minimum requirements. * The <<limits-framebufferIntegerColorSampleCounts, pname:framebufferIntegerColorSampleCounts>> limit which indicates the color sample counts that are supported for all framebuffer color attachments with integer formats.

New Macros

VK_API_VERSION_1_2

New Commands

New Structures

New Enums

New Bitmasks

New Enum Constants

VK_MAX_DRIVER_INFO_SIZE
VK_MAX_DRIVER_NAME_SIZE
Extending VkBufferCreateFlagBits:
- VK_BUFFER_CREATE_DEVICE_ADDRESS_CAPTURE_REPLAY_BIT
Extending VkBufferUsageFlagBits:
- VK_BUFFER_USAGE_SHADER_DEVICE_ADDRESS_BIT
Extending VkDescriptorPoolCreateFlagBits:
- VK_DESCRIPTOR_POOL_CREATE_UPDATE_AFTER_BIND_BIT
Extending VkDescriptorSetLayoutCreateFlagBits:
- VK_DESCRIPTOR_SET_LAYOUT_CREATE_UPDATE_AFTER_BIND_POOL_BIT
Extending VkFormatFeatureFlagBits:
- VK_FORMAT_FEATURE_SAMPLED_IMAGE_FILTER_MINMAX_BIT
Extending VkFramebufferCreateFlagBits:
- VK_FRAMEBUFFER_CREATE_IMAGELESS_BIT
Extending VkImageLayout:
- VK_IMAGE_LAYOUT_DEPTH_ATTACHMENT_OPTIMAL
- VK_IMAGE_LAYOUT_DEPTH_READ_ONLY_OPTIMAL
- VK_IMAGE_LAYOUT_STENCIL_ATTACHMENT_OPTIMAL
- VK_IMAGE_LAYOUT_STENCIL_READ_ONLY_OPTIMAL
Extending VkMemoryAllocateFlagBits:
- VK_MEMORY_ALLOCATE_DEVICE_ADDRESS_BIT
- VK_MEMORY_ALLOCATE_DEVICE_ADDRESS_CAPTURE_REPLAY_BIT
Extending VkResult:
- VK_ERROR_FRAGMENTATION
- VK_ERROR_INVALID_OPAQUE_CAPTURE_ADDRESS
Extending VkSamplerAddressMode:
- VK_SAMPLER_ADDRESS_MODE_MIRROR_CLAMP_TO_EDGE
Extending VkStructureType:
- VK_STRUCTURE_TYPE_ATTACHMENT_DESCRIPTION_2
- VK_STRUCTURE_TYPE_ATTACHMENT_DESCRIPTION_STENCIL_LAYOUT
- VK_STRUCTURE_TYPE_ATTACHMENT_REFERENCE_2
- VK_STRUCTURE_TYPE_ATTACHMENT_REFERENCE_STENCIL_LAYOUT
- VK_STRUCTURE_TYPE_BUFFER_DEVICE_ADDRESS_INFO
- VK_STRUCTURE_TYPE_BUFFER_OPAQUE_CAPTURE_ADDRESS_CREATE_INFO
- VK_STRUCTURE_TYPE_DESCRIPTOR_SET_LAYOUT_BINDING_FLAGS_CREATE_INFO
- VK_STRUCTURE_TYPE_DESCRIPTOR_SET_VARIABLE_DESCRIPTOR_COUNT_ALLOCATE_INFO
- VK_STRUCTURE_TYPE_DESCRIPTOR_SET_VARIABLE_DESCRIPTOR_COUNT_LAYOUT_SUPPORT
- VK_STRUCTURE_TYPE_DEVICE_MEMORY_OPAQUE_CAPTURE_ADDRESS_INFO
- VK_STRUCTURE_TYPE_FRAMEBUFFER_ATTACHMENTS_CREATE_INFO
- VK_STRUCTURE_TYPE_FRAMEBUFFER_ATTACHMENT_IMAGE_INFO
- VK_STRUCTURE_TYPE_IMAGE_FORMAT_LIST_CREATE_INFO
- VK_STRUCTURE_TYPE_IMAGE_STENCIL_USAGE_CREATE_INFO
- VK_STRUCTURE_TYPE_MEMORY_OPAQUE_CAPTURE_ADDRESS_ALLOCATE_INFO
- VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_8BIT_STORAGE_FEATURES
- VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_BUFFER_DEVICE_ADDRESS_FEATURES
- VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_DEPTH_STENCIL_RESOLVE_PROPERTIES
- VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_DESCRIPTOR_INDEXING_FEATURES
- VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_DESCRIPTOR_INDEXING_PROPERTIES
- VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_DRIVER_PROPERTIES
- VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_FLOAT_CONTROLS_PROPERTIES
- VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_HOST_QUERY_RESET_FEATURES
- VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_IMAGELESS_FRAMEBUFFER_FEATURES
- VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_SAMPLER_FILTER_MINMAX_PROPERTIES
- VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_SCALAR_BLOCK_LAYOUT_FEATURES
- VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_SEPARATE_DEPTH_STENCIL_LAYOUTS_FEATURES
- VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_SHADER_ATOMIC_INT64_FEATURES
- VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_SHADER_FLOAT16_INT8_FEATURES
- VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_SHADER_SUBGROUP_EXTENDED_TYPES_FEATURES
- VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_TIMELINE_SEMAPHORE_FEATURES
- VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_TIMELINE_SEMAPHORE_PROPERTIES
- VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_UNIFORM_BUFFER_STANDARD_LAYOUT_FEATURES
- VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_VULKAN_1_1_FEATURES
- VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_VULKAN_1_1_PROPERTIES
- VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_VULKAN_1_2_FEATURES
- VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_VULKAN_1_2_PROPERTIES
- VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_VULKAN_MEMORY_MODEL_FEATURES
- VK_STRUCTURE_TYPE_RENDER_PASS_ATTACHMENT_BEGIN_INFO
- VK_STRUCTURE_TYPE_RENDER_PASS_CREATE_INFO_2
- VK_STRUCTURE_TYPE_SAMPLER_REDUCTION_MODE_CREATE_INFO
- VK_STRUCTURE_TYPE_SEMAPHORE_SIGNAL_INFO
- VK_STRUCTURE_TYPE_SEMAPHORE_TYPE_CREATE_INFO
- VK_STRUCTURE_TYPE_SEMAPHORE_WAIT_INFO
- VK_STRUCTURE_TYPE_SUBPASS_BEGIN_INFO
- VK_STRUCTURE_TYPE_SUBPASS_DEPENDENCY_2
- VK_STRUCTURE_TYPE_SUBPASS_DESCRIPTION_2
- VK_STRUCTURE_TYPE_SUBPASS_DESCRIPTION_DEPTH_STENCIL_RESOLVE
- VK_STRUCTURE_TYPE_SUBPASS_END_INFO
- VK_STRUCTURE_TYPE_TIMELINE_SEMAPHORE_SUBMIT_INFO

VK_VERSION_1_2

Differences Relative to VK_KHR_8bit_storage

Differences Relative to VK_KHR_draw_indirect_count

Differences Relative to VK_KHR_sampler_mirror_clamp_to_edge

Differences Relative to VK_EXT_descriptor_indexing

Differences Relative to VK_EXT_scalar_block_layout

Differences Relative to VK_EXT_shader_viewport_index_layer

Differences Relative to VK_KHR_buffer_device_address

Differences Relative to VK_KHR_shader_atomic_int64

Differences Relative to VK_KHR_shader_float16_int8

Differences Relative to VK_KHR_vulkan_memory_model