Indirect Command Buffers

Recoup encoding time by reusing commands, or create a GPU-driven rendering pipeline by generating commands on the GPU.



Creating an Indirect Command Buffer

Configure a descriptor to specify the properties of an indirect command buffer.

protocol MTLIndirectCommandBuffer

A command buffer containing reusable commands, encoded either on the CPU or GPU.

protocol MTLIndirectRenderCommand

A render command in an indirect command buffer.

protocol MTLIndirectComputeCommand

A compute command in an indirect command buffer.

struct MTLIndirectCommandBufferExecutionRange

A range of commands in an indirect command buffer.

Learning from Samples

Encoding Indirect Command Buffers on the CPU

Reduce CPU overhead and simplify your command execution by reusing commands.

Encoding Indirect Command Buffers on the GPU

Maximize CPU to GPU parallelization by generating render commands on the GPU.

See Also


Setting Resource Storage Modes

Set a storage mode that defines the memory location and access permissions of a resource.

Copying Data to a Private Resource

Use a blit command encoder to copy buffer or texture data to a private resource.

Synchronizing a Managed Resource

Synchronize the contents of a managed resource for the CPU or GPU.

Transferring Data Between Connected GPUs

Use high-speed connections between GPUs to transfer data quickly.

Reducing the Memory Footprint of Metal Apps

Learn best practices for using memory efficiently in iOS and tvOS.

protocol MTLResource

An allocation of memory that is accessible to a GPU.

protocol MTLBlitCommandEncoder

An encoder that encodes memory copying, filtering, and fill commands.

protocol MTLResourceStateCommandEncoder

An encoder that encodes commands that modify resource configurations.


Create and manipulate unstructured GPU resources.


Create and manipulate structured GPU resources.


Create a single allocation of memory from which you can suballocate resources.


Manage access to resources in your app to avoid data hazards.