An explicitly owned AVFrame.

Return INSTRUMENT's input and visual stacking priority.

Return OWNER's short application identity.

Return OWNER's shared lobby client, or NIL.

Return OWNER's ordered status channel symbols. The default method supplies the application channels. A game adds sparse fields with an ordinary method which appends to CALL-NEXT-METHOD; it never has to replace the status frame or its sampling and presentation policy.

Return CHANNEL's cheap semantic value for OWNER and STATUS-BAR. Methods run only on the throttled frame-boundary sample, never during paint. They must inspect already-owned state and must not perform I/O or wait.

Either :PERSPECTIVE or :ISOMETRIC. An isometric picture has no vanishing point, so two chamfers the same width are the same width on screen wherever they sit. That is what makes it the projection to judge a shape rule in.

Publish INSTRUMENT's already-owned state at VIEWER's frame boundary.

Encode INSTRUMENT into VIEWER's final PASS at PHYSICAL-EXTENT.

Replay COMPOSITOR's textureless McCLIM mirror into PASS under affine STATE. DESTINATION-TEXTURE describes the open pass for format and clipping. FRAME-TEXTURE names the bounded in-flight presentation slot whose host-visible buffers are safe to update; normally both arguments are the same texture.

Release INSTRUMENT while VIEWER's GPU device is live.

Logical disjunction of tests and raw truth values.

A retained McCLIM command stream replayed into a caller-owned GPU pass. The caller supplies one 4x4 clip-space affine state and the actual destination texture for each frame. Semantic solids, analytic shapes, gradients, images, lattices, and Slug text are evaluated at that texture's native resolution; there is no…

Attach INSTRUMENT at VIEWER's frame boundary in explicit priority order. ADD consumes a newly offered INSTRUMENT on both success and terminal rejection. Once VIEWER begins stopping, the rejected instrument is released exactly once before APPLICATION-ATTACHMENT-CLOSED is signalled.

Logical conjunction of tests and raw truth values.

Detach and release INSTRUMENT at a frame boundary. Return true when it was attached. Release is synchronous with the caller and therefore cannot overlap a native frame which still borrows the instrument.

Logical negation of one test or raw truth value.

Run FUNCTION with a timestamp on CANVAS's native frame/event thread. The initial native implementation is synchronous: the caller waits for the function's values. The protocol leaves room for a real frame scheduler.