donner::svg::RetainedSpanKey Struct Reference

Everything a captured blit sequence depends on, besides the shape's geometry. More...

#include "donner/svg/renderer/RetainedSpans.h"

Public Attributes
Transform2d	deviceFromLocal
	Local-to-device transform the coverage was scan converted with.
tiny_skia::Paint	paint
	Paint the draw was handed. The coverage itself carries no color, but the paint decides antialiasing, and a draw may derive its blitter's paint from this one (a hairline stroke folds its coverage into the shader opacity, and a transformed draw transforms the shader), so a replay is only sound while this input is unchanged.
tiny_skia::Stroke	stroke
	Stroke configuration, unused by a fill pass.
std::uint64_t	clipEpoch = 0
	Identity of the clip mask in effect, or zero for no clip.
tiny_skia::IntSize	surfaceSize
	Surface the coverage was recorded against. Recorded runs are device-space rectangles that nothing re-clips, so a differently sized surface cannot receive them.
FillRule	fillRule = FillRule::NonZero
	Fill rule, unused by a stroke pass.
bool	openDashSeam = false
	Whether the stroke pass replaced closed contours with explicit closing lines, which the zero-length-gap dash case does and which changes the outline the stroker expands.

Friends
bool	operator== (const RetainedSpanKey &lhs, const RetainedSpanKey &rhs)

Detailed Description

Everything a captured blit sequence depends on, besides the shape's geometry.

Geometry is deliberately absent: it is tracked by removing a shape's whole retained entry when its resolved path changes, which costs nothing per frame, rather than by re-comparing point arrays on every draw. Everything else is small enough to compare directly, so the renderer never has to reason about which mutation hooks mark which property.

Member Data Documentation

clipEpoch

std::uint64_t donner::svg::RetainedSpanKey::clipEpoch = 0

Identity of the clip mask in effect, or zero for no clip.

See also

RendererTinySkia's clip epoch assignment: equal epochs mean byte-equal masks.

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

• donner/svg/renderer/RetainedSpans.h