# VkValidationFeatureEnableEXT(3) Manual Page

## Name

VkValidationFeatureEnableEXT - Specify validation features to enable

## C Specification

Possible values of elements of the VkValidationFeaturesEXT::`pEnabledValidationFeatures` array, specifying validation features to be enabled, are:

    typedef enum VkValidationFeatureEnableEXT {
        VK_VALIDATION_FEATURE_ENABLE_GPU_ASSISTED_EXT = 0,
        VK_VALIDATION_FEATURE_ENABLE_GPU_ASSISTED_RESERVE_BINDING_SLOT_EXT = 1,
        VK_VALIDATION_FEATURE_ENABLE_BEST_PRACTICES_EXT = 2,
        VK_VALIDATION_FEATURE_ENABLE_DEBUG_PRINTF_EXT = 3,
        VK_VALIDATION_FEATURE_ENABLE_MAX_ENUM_EXT = 0x7FFFFFFF
    } VkValidationFeatureEnableEXT;

## Description

- `VK_VALIDATION_FEATURE_ENABLE_GPU_ASSISTED_EXT` specifies that GPU-assisted validation is enabled. Activating this feature instruments shader programs to generate additional diagnostic data. This feature is disabled by default.

- `VK_VALIDATION_FEATURE_ENABLE_GPU_ASSISTED_RESERVE_BINDING_SLOT_EXT` specifies that the validation layers reserve a descriptor set binding slot for their own use. The layer reports a value for VkPhysicalDeviceLimits::`maxBoundDescriptorSets` that is one less than the value reported by the device. If the device supports the binding of only one descriptor set, the validation layer does not perform GPU-assisted validation. This feature is disabled by default. The GPU-assisted validation feature must be enabled in order to use this feature.

- `VK_VALIDATION_FEATURE_ENABLE_BEST_PRACTICES_EXT` specifies that Vulkan best-practices validation is enabled. Activating this feature enables the output of warnings related to common misuse of the API, but which are not explicitly prohibited by the specification. This feature is disabled by default.

- `VK_VALIDATION_FEATURE_ENABLE_DEBUG_PRINTF_EXT` specifies that the layers will process `debugPrintfEXT` operations in shaders and send the resulting output to the debug callback. This feature is disabled by default. `VK_VALIDATION_FEATURE_ENABLE_DEBUG_PRINTF_EXT` must never be enabled when `VK_VALIDATION_FEATURE_ENABLE_GPU_ASSISTED_EXT` is enabled.

## See Also

VkValidationFeaturesEXT

## 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

Copyright (c) 2014-2020 Khronos Group. This work is licensed under a Creative Commons Attribution 4.0 International License.