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Appendix F: Vulkan Roadmap Milestones

Roadmap milestones are intended to be supported by mid-to-high-end smartphones, tablets, laptops, consoles, and desktop devices.

Each milestone indicates support for a set of extensions, features, limits, and formats across these devices, and should be supported by all such new hardware shipping by the end of the target year or shortly thereafter.

Roadmap 2022

The Roadmap 2022 milestone is intended to be supported by newer mid-to-high-end devices shipping in 2022 or shortly thereafter across mainstream smartphone, tablet, laptops, console and desktop devices.

Required API Versions

This profile requires Vulkan 1.3.

Required Limits

The following core increased limits are required

Table 90. Vulkan 1.0 Limits
Limit Name Unsupported Limit Core Limit Profile Limit Limit Type1

maxImageDimension1D

-

4096

8192

min

maxImageDimension2D

-

4096

8192

min

maxImageDimensionCube

-

4096

8192

min

maxImageArrayLayers

-

256

2048

min

maxUniformBufferRange

-

16384

65536

min

bufferImageGranularity

-

131072

4096

max

maxPerStageDescriptorSamplers

-

16

64

min

maxPerStageDescriptorUniformBuffers

-

12

15

min

maxPerStageDescriptorStorageBuffers

-

4

30

min

maxPerStageDescriptorSampledImages

-

16

200

min

maxPerStageDescriptorStorageImages

-

4

16

min

maxPerStageResources

-

128

200

min

maxDescriptorSetSamplers

-

96

576

min, n × PerStage

maxDescriptorSetUniformBuffers

-

72

90

min, n × PerStage

maxDescriptorSetStorageBuffers

-

24

96

min, n × PerStage

maxDescriptorSetSampledImages

-

96

1800

min, n × PerStage

maxDescriptorSetStorageImages

-

24

144

min, n × PerStage

maxFragmentCombinedOutputResources

-

4

16

min

maxComputeWorkGroupInvocations

-

128

256

min

maxComputeWorkGroupSize

-

(128,128,64)

(256,256,64)

min

subTexelPrecisionBits

-

4

8

min

mipmapPrecisionBits

-

4

6

min

maxSamplerLodBias

-

2

14

min

pointSizeGranularity

0.0

1.0

0.125

max, fixed point increment

lineWidthGranularity

0.0

1.0

0.5

max, fixed point increment

standardSampleLocations

-

-

VK_TRUE

implementation-dependent

maxColorAttachments

-

4

7

min

Table 91. Vulkan 1.1 Limits
Limit Name Unsupported Limit Core Limit Profile Limit Limit Type1

subgroupSize

-

1/4

4

implementation-dependent

subgroupSupportedStages

-

VK_SHADER_STAGE_COMPUTE_BIT

VK_SHADER_STAGE_COMPUTE_BIT
VK_SHADER_STAGE_FRAGMENT_BIT

implementation-dependent

subgroupSupportedOperations

-

VK_SUBGROUP_FEATURE_BASIC_BIT

VK_SUBGROUP_FEATURE_BASIC_BIT
VK_SUBGROUP_FEATURE_VOTE_BIT
VK_SUBGROUP_FEATURE_ARITHMETIC_BIT
VK_SUBGROUP_FEATURE_BALLOT_BIT
VK_SUBGROUP_FEATURE_SHUFFLE_BIT
VK_SUBGROUP_FEATURE_SHUFFLE_RELATIVE_BIT
VK_SUBGROUP_FEATURE_QUAD_BIT

implementation-dependent

Table 92. Vulkan 1.2 Limits
Limit Name Unsupported Limit Core Limit Profile Limit Limit Type1

shaderSignedZeroInfNanPreserveFloat16

-

-

VK_TRUE

implementation-dependent

shaderSignedZeroInfNanPreserveFloat32

-

-

VK_TRUE

implementation-dependent

maxPerStageDescriptorUpdateAfterBindInputAttachments

0

4

7

min

Table 93. Vulkan 1.3 Limits
Limit Name Unsupported Limit Core Limit Profile Limit Limit Type1

maxSubgroupSize

-

-

4

min

Required Extensions

The following extensions are required

Roadmap 2024

The Roadmap 2024 milestone is intended to be supported by newer mid-to-high-end devices shipping in 2024 or shortly thereafter across mainstream smartphone, tablet, laptops, console and desktop devices.

Two of the core aims of this roadmap profile are to enable developers to rely on a number of important rasterization and shader features have been available for a long time, but until now have not enjoyed wide support.

Shader features required include smaller types (8/16-bit integers and 16-bit floats), reconvergence guarantees for subgroup ops (VK_KHR_shader_maximal_reconvergence and VK_KHR_shader_quad_control), and more consistent floating point handling (VK_KHR_shader_float_controls2 and round-to-nearest-even for 32-/16-bit floats). Rasterization features include requiring support for multi-draw indirect, shader draw parameters, 8-bit indices, better line rasterization definitions, and local reads when using dynamic rendering. A few other features have been added opportunistically, in lieu of shipping a Vulkan 1.4 in the same time frame, such as push descriptors and the various minor improvements included in VK_KHR_maintenance5.

Required Profiles

This profile requires the Roadmap 2022 profile.

Required Features

The following core optional features are required to be supported:

Required Limits

The following core increased limits are required

Table 94. Vulkan 1.0 Limits
Limit Name Unsupported Limit Core Limit Profile Limit Limit Type1

maxBoundDescriptorSets

-

4

7

min

maxColorAttachments

-

4

8

min

timestampComputeAndGraphics

-

FALSE

TRUE

Boolean

Table 95. Vulkan 1.2 Limits
Limit Name Unsupported Limit Core Limit Profile Limit Limit Type1

shaderRoundingModeRTEFloat16

-

FALSE

TRUE

Boolean

shaderRoundingModeRTEFloat32

-

FALSE

TRUE

Boolean