Composes cached non-WGPU document tiles into one transparent GL texture. More...

#include "donner/editor/DocumentPresentationCompositor.h"

Public Member Functions
	DocumentPresentationCompositor (const DocumentPresentationCompositor &)=delete
DocumentPresentationCompositor &	operator= (const DocumentPresentationCompositor &)=delete
DocumentCompositeTextureView	compose (const ViewportState &viewport, const Box2d &imageClipRect, std::span< const GlTextureCache::TileView > overviewTiles, std::span< const GlTextureCache::TileView > tiles, const std::optional< SelectTool::ActiveDragPreview > &activeDragPreview, const std::optional< SelectTool::ActiveDragPreview > &displayedDragPreview, Entity suppressedLayerEntity, bool suppressDragTargetTiles)
	Compose the current document presentation into one pane-sized texture.
void	reset ()
	Invalidate the cached request and clear its presented view while retaining allocations.
std::uint64_t	retainedBytes () const
	Bytes retained by the two RGBA8 intermediate textures.
std::uint64_t	compositionCountForTesting () const
	Number of cache-miss compositions, exposed for deterministic performance tests.

Detailed Description

Composes cached non-WGPU document tiles into one transparent GL texture.

The compositor preserves each tile's full affine presentation quad, including live drag and transform previews. It performs the tile blend in premultiplied form, resolves back to straight alpha for ImGui, and caches the result while all presentation inputs remain unchanged.

Member Function Documentation

◆ compose()

DocumentCompositeTextureView donner::editor::DocumentPresentationCompositor::compose	(	const ViewportState &	viewport,
		const Box2d &	imageClipRect,
		std::span< const GlTextureCache::TileView >	overviewTiles,
		std::span< const GlTextureCache::TileView >	tiles,
		const std::optional< SelectTool::ActiveDragPreview > &	activeDragPreview,
		const std::optional< SelectTool::ActiveDragPreview > &	displayedDragPreview,
		Entity	suppressedLayerEntity,
		bool	suppressDragTargetTiles )

nodiscard

Compose the current document presentation into one pane-sized texture.

Parameters

viewport	Presented document-to-screen mapping.
imageClipRect	Visible document region clipped to the render pane.
overviewTiles	Low-resolution infill tiles drawn below active coverage.
tiles	Active paint-order tile views.
activeDragPreview	Live drag transform to advance eligible tiles.
displayedDragPreview	Drag transform already represented by cached tiles.
suppressedLayerEntity	Layer omitted from this presentation frame.
suppressDragTargetTiles	Whether active drag-target tiles are omitted.

Returns: Cached or newly composed texture view, or an empty view when composition is invalid.

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

donner/editor/DocumentPresentationCompositor.h

Public Member Functions

Detailed Description

Member Function Documentation

◆ compose()