Runtime Execution

The runtime executes a compiled graph for one frame.

It is a deterministic execution engine, not a scheduler.

Responsibilities

Execute nodes in topologically sorted order
Bind resources
Dispatch shader programs
Produce output textures

Execution Model

Each call:

Accepts FrameCtx
Reads NodeProps
Executes compiled plan
Returns outputs

No implicit time accumulation occurs.

Resource Management

Lazy shader compilation
Per-node resource caching
Texture reuse across frames

Threading Model

Requires active GL context on calling thread.

No internal multithreading is performed.

Error Model

Execution may fail due to:

Shader compile/link errors
Missing inputs
Invalid output configuration

Errors are returned immediately.