donner::editor::RenderRequest Struct Reference

Per-request handoff data captured at render-request time so the worker has everything it needs without touching live UI state. More...

#include "donner/editor/AsyncRenderer.h"

Collaboration diagram for donner::editor::RenderRequest:

Classes
struct	DragPreview

Public Member Functions
	RenderRequest (svg::Renderer &renderer, svg::SVGDocument document)
	Construct a render request.

Public Attributes
RenderLease	lease
	Non-null renderer/document lease for the worker handoff.
std::uint64_t	version = 0
	Document frame version snapshotted at request time so the UI can match the landed bitmap with other same-version assets.
std::uint64_t	documentGeneration = 0
	Generation counter from AsyncSVGDocument::documentGeneration(). Bumps only when the inner document is fully replaced, so the worker can reset entity-keyed compositor state without treating every frame mutation as a replacement.
std::unordered_map< Entity, Entity >	structuralRemap
	Entity remap for structurally equivalent document replacement. When present, the worker remaps compositor state instead of fully resetting layer bitmaps and static segments.
std::optional< svg::SVGElement >	selection
	Snapshot of the selection at request time (used for overlay chrome). The worker holds this optional by value, so if the UI thread clears the selection mid-render the worker still draws the pre-render chrome.
Entity	selectedEntity = entt::null
	Currently-selected entity (if any) that the compositor should keep promoted across renders. The compositor demotes the previous entity and promotes this one when it changes. Allows pre-warming on selection so the subsequent drag frame has cached bg/fg/layer bitmaps ready. The compositor stays alive across drag → idle transitions for as long as this stays non-null and pointing at the same entity.
std::optional< DragPreview >	dragPreview
	Optional in-progress drag preview rendered through the compositor fast path.
EditorRasterViewport	rasterViewport
	Raster viewport for this request. The UI thread computes it from the editor camera so the worker can render a bounded high-zoom output surface without reading live UI state.
bool	overviewInfillOnly = false
	True when this request should produce only a low-resolution full-document overview infill.

Detailed Description

Per-request handoff data captured at render-request time so the worker has everything it needs without touching live UI state.

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Class Documentation

donner::editor::RenderRequest::DragPreview

struct donner::editor::RenderRequest::DragPreview

Collaboration diagram for donner::editor::RenderRequest::DragPreview:

Class Members
Transform2d	documentFromCachedDocument = Transform2d()	Active affine transform represented by this request. Selection prewarms use identity.
uint64_t	dragGeneration = 0	Monotonic id for the active drag gesture. Selection prewarms use zero.
Entity	entity = entt::null
vector< Entity >	extraEntities	Additional entities moving with entity under the same active drag transform.
InteractionHint	interactionKind = svg::compositor::InteractionHint::ActiveDrag	Which interaction phase drove this preview. Selection means the editor is pre-warming a layer for the selected entity before any drag begins. ActiveDrag means the user is actively dragging — the DOM's transform attribute already reflects the cursor delta. The compositor stamps the correct InteractionHint on the entity based on this field so downstream introspection stays accurate.
Vector2d	translation = Vector2d::Zero()	Active drag translation represented by this request. Selection prewarms use zero.

Constructor & Destructor Documentation

RenderRequest()

donner::editor::RenderRequest::RenderRequest ( svg::Renderer & renderer, svg::SVGDocument document )

inline

Construct a render request.

Parameters

renderer	Renderer backend that remains alive until the request completes.
document	Document handle to render. The request keeps its registry handle alive while the worker owns the request.

Member Data Documentation

overviewInfillOnly

bool donner::editor::RenderRequest::overviewInfillOnly = false

True when this request should produce only a low-resolution full-document overview infill.

The worker still keeps the selected entity promoted, but skips the composited split preview and publishes a full-canvas tile. The UI uploads it into the retained overview cache without replacing active viewport-bounded tiles.

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The documentation for this struct was generated from the following file:

• donner/editor/AsyncRenderer.h