Crate drmkit_scene_sources 

Tier-1 buffer sources for drmkit scenes.

Port of the tier-1 sources from src/scene/ — the ones that need no GPU, no EGL, and no external media stack. Everything here implements LayerBufferSource, so a scene consumes them without knowing which it has.

Structs

Acquired

The commit thread’s decision.

CursorSource

A cursor presented as a scene layer.

DmaBufSourceCache

Caches one ExternalDmaBufSource per buffer identity.

DumbBufferSource

The simplest source: one CPU-writable linear buffer, created once and reused every frame.

ExternalDmaBufPool

A pool of externally allocated DMA-BUFs, imported on first sight.

ExternalDmaBufRing

A rotating ring of externally allocated DMA-BUFs.

ExternalDmaBufSource

A caller-owned DMA-BUF wrapped as a scanout-ready KMS framebuffer.

ExternalPlane

One plane of an externally allocated buffer.

GbmBufferSource

One GPU-allocated buffer, created once and scanned out every frame.

RingPresenter

Tracks pending, scanning and in-flight buffers across frames.

Enums

ExternalError

Why wrapping an external buffer failed.

GbmSourceError

Why a GBM-backed source could not be built.

Present

What the commit thread should do this vblank.

Constants

MAX_DAMAGE

How many damage rectangles a submit can carry.

Type Aliases

OnRelease

Called when a slot leaves the screen and the producer may reuse it.

SlotKey

Opaque buffer identity: a slot index, or a pool’s own key.