VK_VERSION_1

Description

Vulkan Version 1.4 promoted a number of key extensions into the core API:

All differences in behavior between these extensions and the corresponding Vulkan 1.4 functionality are summarized below.

Differences Relative to VK_KHR_dynamic_rendering_local_read

If the VK_KHR_dynamic_rendering_local_read extension is not supported, Vulkan 1.4 implementations must support local read only for storage resources and single sampled color attachments.

Support for reading depth/stencil attachments and multi-sampled attachments are respectively gated behind the new boolean dynamicRenderingLocalReadDepthStencilAttachments and dynamicRenderingLocalReadMultisampledAttachments properties.

If dynamicRenderingLocalReadDepthStencilAttachments is VK_FALSE, implementations do not support depth/stencil attachment access within dynamic rendering.
If dynamicRenderingLocalReadMultisampledAttachments is VK_FALSE, implementations do not support multisampled attachment access within dynamic rendering.
If both properties are VK_TRUE, the full functionality of the extension is supported.

Differences Relative to VK_EXT_host_image_copy

If the VK_EXT_host_image_copy extension is not supported, support for it is optional in Vulkan 1.4.

An implementation that has a VK_QUEUE_GRAPHICS_BIT queue must support either:
- the hostImageCopy feature; or
- an additional queue that supports VK_QUEUE_TRANSFER_BIT.

Differences Relative to VK_KHR_push_descriptor

VK_KHR_push_descriptor did not include a feature bit, so a new feature bit has been added to VkPhysicalDeviceVulkan14Features to gate its functionality: pushDescriptor. Enabling this new feature has the same effect as enabling the extension.

Differences Relative to VK_EXT_pipeline_protected_access

VK_EXT_pipeline_protected_access is only useful when the protectedMemory feature is supported. As the protectedMemory feature is optional in core Vulkan, the pipelineProtectedAccess feature is only required when the protectedMemory feature is supported.

Differences Relative to VK_KHR_line_rasterization

The bresenhamLines feature is required, rather than just any one of the line style features.

Differences Relative to VK_KHR_shader_subgroup_rotate

The shaderSubgroupRotateClustered feature is required in addition to shaderSubgroupRotate.

Additional Vulkan 1.4 Feature Support

In addition to the promoted extensions described above, Vulkan 1.4 added required support for:

All queues supporting VK_QUEUE_GRAPHICS_BIT or VK_QUEUE_COMPUTE_BIT must also advertise VK_QUEUE_TRANSFER_BIT.
Clustered subgroup operations must be advertised in Vulkan 1.4 via setting both VK_SUBGROUP_FEATURE_CLUSTERED_BIT and VK_SUBGROUP_FEATURE_ROTATE_CLUSTERED_BIT (as an interaction with the promoted VK_KHR_shader_subgroup_rotate functionality) in supportedOperations.
The following features that were optional in earlier versions:

Updated Vulkan 1.4 Limit Support

Vulkan 1.4 also requires support for the following updated limits:

maxImageDimension1D is increased from 4096 to 8192
maxImageDimension2D is increased from 4096 to 8192
maxImageDimension3D is increased from 256 to 512
maxImageDimensionCube is increased from 4096 to 8192
maxImageArrayLayers is increased from 256 to 2048
maxUniformBufferRange is increased from 16384 to 65536
maxPushConstantsSize is increased from 128 to 256
bufferImageGranularity is decreased from 131072 to 4096
maxBoundDescriptorSets is increased from 4 to 7
maxPerStageDescriptorUniformBuffers is increased from 12 to 15
maxPerStageResources is increased from 128 to 200
maxDescriptorSetUniformBuffers is increased from 72 to 90
maxDescriptorSetStorageBuffers is increased from 24 to 96
maxDescriptorSetStorageImages is increased from 24 to 144
maxFragmentCombinedOutputResources is increased from 4 to 16
maxComputeWorkGroupInvocations is increased from 128 to 256
maxComputeWorkGroupSize is increased from (128,128,64) to (256,256,64)
shaderSignedZeroInfNanPreserveFloat16 is changed from unspecified to VK_TRUE
shaderSignedZeroInfNanPreserveFloat32 is changed from unspecified to VK_TRUE
subTexelPrecisionBits is increased from 4 to 8
mipmapPrecisionBits is increased from 4 to 6
maxSamplerLodBias is increased from 2 to 14
maxViewportDimensions is increased from (4096,4096) to (7680,7680)
viewportBoundsRange is increased from (-8192,8191) to (-15360,15359)
maxFramebufferWidth is increased from 4096 to 7680
maxFramebufferHeight is increased from 4096 to 7680
maxColorAttachments is increased from 7 to 8
timestampComputeAndGraphics is changed from unspecified to VK_TRUE
pointSizeRange is increased from (1.0,64.0 - ULP) to (1.0,256.0 - pointSizeGranularity)
pointSizeGranularity is decreased from 1.0 to 0.125
lineWidthGranularity is decreased from 1.0 to 0.5
maxPushDescriptors is increased from 16 to 32
standardSampleLocations is changed from unspecified to VK_TRUE

New Macros

VK_API_VERSION_1_4

New Structures

New Enums

New Bitmasks

New Enum Constants

Document Notes

For more information, see the Vulkan Specification.

This page is extracted from the Vulkan Specification. Fixes and changes should be made to the Specification, not directly.

Copyright

SPDX-License-Identifier: CC-BY-4.0

VK_VERSION_1_4(3) Manual Page

Name