VkBool32

VkBool32 is a boolean type used throughout the Vulkan API to represent true/false values. It is defined as a 32-bit unsigned integer (typedef uint32_t VkBool32) to preserve ABI compatibility across languages and compilers that interact with Vulkan's C interface.

Boolean constants: VK_TRUE and VK_FALSE are defined as 1 and 0, respectively. In source code and API usage, a VkBool32 value is considered true when it is not VK_FALSE (0); most implementations use VK_TRUE for the true value, but any non-zero value may appear in practice and should typically be treated as true unless explicitly compared against VK_FALSE.

Usage: VkBool32 is used for boolean flags in return values, handles, and structure members within Vulkan functions and structures. This design avoids the need for the C99 bool type and ensures consistent representation across platforms.

Interpreting values: When reading a VkBool32, test against VK_FALSE or compare to VK_TRUE depending on the language and context. In plain C, an if statement will treat 0 as false and any non-zero value as true; many wrappers normalize to VK_TRUE/VK_FALSE.

See also: Vulkan API, VkBool32 type, VK_TRUE, VK_FALSE, boolean conventions in Vulkan.