One row of the unified "everything composited together" view that the layer-inspector panel renders in paint order — design doc 0033 §M1++. Mirrors what composeLayers actually draws so the operator sees the same sequence of blits the renderer performs. More...

#include "donner/svg/compositor/CompositorController.h"

Collaboration diagram for donner::svg::compositor::CompositorController::CompositeTileSnapshot:

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Public Types
enum class	Kind : uint8_t { Background , Foreground , Segment , Layer }

Public Attributes
Kind	kind = Kind::Layer
std::string	id
	Stable identifier for the editor's GL texture cache: "bg", "fg", "seg:{index}", "layer:{entity}". Lets the panel re-use uploaded textures across frames for unchanged tiles.
std::string	label
	Human-readable label rendered in the panel: "background", "foreground", "segment 0", "layer #12".
Vector2i	bitmapDims = Vector2i::Zero()
	Source bitmap dimensions in canvas pixels. Vector2i::Zero() when the source bitmap is empty.
uint64_t	generation = 0
	Monotonic version counter for change detection. Layers / segments expose real generations; bg/fg use a derived generation that bumps when the split-bitmap cache is rebuilt.
double	lastRasterizeMs = 0.0
	Wall-clock duration of the most recent rasterize. Always 0 for Background / Foreground (those are composed, not rasterized, by recomposeSplitBitmaps).
bool	immediate = false
	True when this segment or promoted layer is presented as a transient immediate tile instead of a retained bitmap/texture cache entry.
bool	staticHeuristicImmediate = false
	True when the static geometry-cost heuristic selected immediate presentation.
bool	dynamicHeuristicImmediate = false
	True when measured raster time expanded the span into immediate presentation.
bool	demotedDynamicImmediate = false
	True when this span just left dynamic immediate mode because the last immediate render was over budget.
double	immediateBudgetChargeMs = 0.0
	Budget charged by this immediate tile against the 120 Hz immediate-span budget.
double	immediateBudgetMs = 0.0
	Total 120 Hz immediate-span budget for this frame.
int	estimatedDrawOps = 0
	Estimated direct geometry draw count used by the immediate/cached heuristic.
int	estimatedPathVerbs = 0
	Estimated path verb count used by the immediate/cached heuristic.
bool	hasExpensiveEffect = false
	True when this span contains effects/resources that force cached presentation.
bool	visible = false
	True when this span has a visible, bounded contribution to the canvas.
Box2d	boundsCanvas
	Snapped canvas-space bounds used by the immediate/cached heuristic.
uint64_t	estimatedRetainedBytes = 0
	Estimated retained texture bytes if this span is cached.
double	estimatedRedrawCost = 0.0
	Relative redraw cost estimated by the immediate/cached heuristic.
double	estimatedCacheOverheadCost = 0.0
	Relative cached-texture overhead estimated by the immediate/cached heuristic.
std::string	spanRangeLabel
	Human-readable first/last element range covered by this static segment.
bool	hasValidBitmap = false
	Whether the source bitmap has pixels.
bool	isDragTarget = false
	Whether this tile is the active drag-target layer (highlighted in the panel). Always false for non-Layer kinds.
std::shared_ptr< const RendererTextureSnapshot >	textureSnapshot
	Optional backend-owned GPU texture. Geode-backed editor builds render this directly in the layer panel to avoid a CPU readback just for diagnostics.
Vector2i	thumbnailDims = Vector2i::Zero()
	Aspect-preserving CPU downsample (max-side kLayerThumbnailMaxSide) of the source bitmap. Empty when the source has no CPU bitmap or when textureSnapshot is used instead.
std::vector< uint8_t >	thumbnailPixels

Detailed Description

One row of the unified "everything composited together" view that the layer-inspector panel renders in paint order — design doc 0033 §M1++. Mirrors what composeLayers actually draws so the operator sees the same sequence of blits the renderer performs.

Carries either a downsampled CPU thumbnail or a backend texture snapshot for every tile (background, foreground, segment, layer) so the panel can render previews inline instead of just dimensions.

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

donner/svg/compositor/CompositorController.h

Public Types

Public Attributes

Detailed Description