SPIR-V Built-In
LaunchSizeKHR
Launch dimensions for ray shaders
LaunchSizeKHR
A variable decorated with the LaunchSizeKHR decoration will contain the
width, height, and depth dimensions passed to the
vkCmdTraceRaysKHR command that initiated this shader execution.
The width is in the first component, the height is in the second
component, and the depth is in the third component.
Valid Usage
VUID-LaunchSizeKHR-LaunchSizeKHR-04269
The LaunchSizeKHR decoration must be used only within the
RayGenerationKHR, IntersectionKHR, AnyHitKHR,
ClosestHitKHR, MissKHR, or CallableKHR Execution Model
VUID-LaunchSizeKHR-LaunchSizeKHR-04270
The variable decorated with LaunchSizeKHR must be declared using
the Input Storage Class
VUID-LaunchSizeKHR-LaunchSizeKHR-04271
The variable decorated with LaunchSizeKHR must be declared as a
three-component vector of 32-bit integer values