Module transfer 

Frame transfer contracts shared by CPU, native OpenGL, and browser WebGL backends.

Graphics objects remain opaque and caller-owned unless explicitly marked otherwise. Backends perform the actual GL/WebGL calls through GraphicsAdapter, after this module validates the context identity, execution owner, current-context state, context-loss state, and transfer policy.

Structs

ContextIdentity

Stable identity supplied by a context adapter. It is never inferred from a GL object name.

CpuFrameDestination

A borrowed CPU destination. It does not take ownership of caller memory.

CpuFrameSource

A borrowed CPU source with explicit orientation. Plane strides live on Plane.

CpuPlaneDestination

A borrowed mutable destination plane with an explicit row stride.

ExecutionOwner

Identity of the thread, worker, or executor allowed to use a context.

GraphicsResource

An opaque native GL or browser WebGL image resource.

TransferCapability

Runtime support and the cost/stages of a proposed transfer.

TransferPolicy

Cost policy for a frame transfer. require is strict and never silently falls back.

Enums

ColorConversion

Whether numeric color values must be converted.

FrameDestination

FrameSource

GraphicsApi

The graphics API that created a resource.

Orientation

Location of the first logical row in memory or a graphics resource.

ResourceKind

Kind of caller- or library-supplied graphics object.

ResourceOwnership

Determines whether zvidlib may ask the adapter to delete a resource.

ScaleFilter

Scaling filter requested by a transfer.

TransferStage

An explicit, inspectable operation in a transfer plan.

Traits

GraphicsAdapter

Platform adapter that performs native GL or WebGL operations.

Functions

execute_transfer

Validates, plans, and executes a CPU/GL/WebGL transfer.

inspect_transfer

Inspects a transfer without executing it.