# VkDebugUtilsMessageSeverityFlagBitsEXT(3) Manual Page

## Name

VkDebugUtilsMessageSeverityFlagBitsEXT - Bitmask specifying which severities of events cause a debug messenger callback

Loading… please wait.

## C Specification

Bits which can be set in VkDebugUtilsMessengerCreateInfoEXT::`messageSeverity`, specifying event severities which cause a debug messenger to call the callback, are:

    // Provided by VK_EXT_debug_utils
    typedef enum VkDebugUtilsMessageSeverityFlagBitsEXT {
        VK_DEBUG_UTILS_MESSAGE_SEVERITY_VERBOSE_BIT_EXT = 0x00000001,
        VK_DEBUG_UTILS_MESSAGE_SEVERITY_INFO_BIT_EXT = 0x00000010,
        VK_DEBUG_UTILS_MESSAGE_SEVERITY_WARNING_BIT_EXT = 0x00000100,
        VK_DEBUG_UTILS_MESSAGE_SEVERITY_ERROR_BIT_EXT = 0x00001000,
    } VkDebugUtilsMessageSeverityFlagBitsEXT;

## Description

- `VK_DEBUG_UTILS_MESSAGE_SEVERITY_VERBOSE_BIT_EXT` specifies the most verbose output indicating all diagnostic messages from the Vulkan loader, layers, and drivers should be captured.

- `VK_DEBUG_UTILS_MESSAGE_SEVERITY_INFO_BIT_EXT` specifies an informational message such as resource details that may be handy when debugging an application.

- `VK_DEBUG_UTILS_MESSAGE_SEVERITY_WARNING_BIT_EXT` specifies use of Vulkan that may expose an application bug. Such cases may not be immediately harmful, such as a fragment shader outputting to a location with no attachment. Other cases may point to behavior that is almost certainly bad when unintended such as using an image whose memory has not been filled. In general if you see a warning but you know that the behavior is intended/desired, then simply ignore the warning.

- `VK_DEBUG_UTILS_MESSAGE_SEVERITY_ERROR_BIT_EXT` specifies that the application has violated a valid usage condition of the specification.

Note | The values of VkDebugUtilsMessageSeverityFlagBitsEXT are sorted based on severity. The higher the flag value, the more severe the message. This allows for simple boolean operation comparisons when looking at VkDebugUtilsMessageSeverityFlagBitsEXT values. For example:
        if (messageSeverity >= VK_DEBUG_UTILS_MESSAGE_SEVERITY_WARNING_BIT_EXT) {
            // Do something for warnings and errors
        }
In addition, space has been left between the enums to allow for later addition of new severities in between the existing values.

## See Also

PFN_vkDebugUtilsMessengerCallbackEXT, VK_EXT_debug_utils, VkDebugUtilsMessageSeverityFlagsEXT, vkSubmitDebugUtilsMessageEXT

## 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 2014-2025 The Khronos Group Inc.

SPDX-License-Identifier: CC-BY-4.0