## C Specification

Bits which can be set in VkDebugReportCallbackCreateInfoEXT::flags, specifying events which cause a debug report, are:

// Provided by VK_EXT_debug_report
typedef enum VkDebugReportFlagBitsEXT {
VK_DEBUG_REPORT_INFORMATION_BIT_EXT = 0x00000001,
VK_DEBUG_REPORT_WARNING_BIT_EXT = 0x00000002,
VK_DEBUG_REPORT_PERFORMANCE_WARNING_BIT_EXT = 0x00000004,
VK_DEBUG_REPORT_ERROR_BIT_EXT = 0x00000008,
VK_DEBUG_REPORT_DEBUG_BIT_EXT = 0x00000010,
} VkDebugReportFlagBitsEXT;

## Description

• VK_DEBUG_REPORT_ERROR_BIT_EXT specifies that the application has violated a valid usage condition of the specification.

• VK_DEBUG_REPORT_WARNING_BIT_EXT specifies use of Vulkan that may expose an app 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_REPORT_PERFORMANCE_WARNING_BIT_EXT specifies a potentially non-optimal use of Vulkan, e.g. using vkCmdClearColorImage when setting VkAttachmentDescription::loadOp to VK_ATTACHMENT_LOAD_OP_CLEAR would have worked.

• VK_DEBUG_REPORT_INFORMATION_BIT_EXT specifies an informational message such as resource details that may be handy when debugging an application.

• VK_DEBUG_REPORT_DEBUG_BIT_EXT specifies diagnostic information from the implementation and layers.