vkCmdExecuteCommands

vkCmdExecuteCommands is a Vulkan command that allows a command buffer to execute another command buffer. This provides a mechanism for command buffer reuse and composition. When vkCmdExecuteCommands is called, the commands within the secondary command buffer are replayed as if they were recorded directly into the primary command buffer.

This command is particularly useful for scenarios where the same set of commands needs to be executed multiple times with different parameters or within different contexts. For instance, it can be used to encapsulate common rendering operations like drawing a UI element or applying a post-processing effect. This promotes code modularity and can lead to reduced CPU overhead by avoiding redundant recording of commands.

Secondary command buffers can be created with specific flags that determine their behavior when executed. These flags can influence aspects like render pass compatibility and query pool inheritance. The execution of secondary command buffers happens synchronously within the primary command buffer's recording process. Therefore, the secondary command buffer must be in a state where it can be executed.