Parameters for a linear gradient fill at the Geode drawing layer. More...

#include "donner/svg/renderer/geode/GeoEncoder.h"

Collaboration diagram for donner::geode::LinearGradientParams:

Classes
struct	Stop
	Gradient stops. Colors are in straight alpha, 0..1 per channel — the encoder premultiplies before upload. Offsets must be in [0, 1]. More...

Public Attributes
Vector2d	startGrad = Vector2d::Zero()
	Start point in gradient space.
Vector2d	endGrad = Vector2d::Zero()
	End point in gradient space.
Transform2d	gradientFromPath
	Affine transform that maps a path-space sample position to gradient space. The fragment shader uses this to recover the gradient parameter t per pixel. This is the inverse of pathFromGradient and already bakes in both gradientUnits and the gradientTransform attribute.
uint32_t	spreadMode = 0
	Spread mode at the edges of the gradient range. 0 = pad, 1 = reflect, 2 = repeat.
std::span< const Stop >	stops
	Gradient stops (capped at 16 entries by the underlying uniform buffer).

Detailed Description

Parameters for a linear gradient fill at the Geode drawing layer.

All geometry fields are in the gradient's own coordinate system (after the caller has already folded gradientUnits + the gradientTransform attribute into gradientFromPath). The encoder uploads these verbatim into a per-draw uniform buffer consumed by shaders/slug_gradient.wgsl.

Class Documentation

◆ donner::geode::LinearGradientParams::Stop

struct donner::geode::LinearGradientParams::Stop

Gradient stops. Colors are in straight alpha, 0..1 per channel — the encoder premultiplies before upload. Offsets must be in [0, 1].

A hard cap of 16 stops is enforced inside the encoder to match the fixed-size uniform buffer layout in slug_gradient.wgsl. Stops beyond the cap are silently truncated — a follow-up will move stop storage to a texture lookup (GeodeGradientCacheComponent) to lift this limit. A single gradient stop: normalized offset and premultiplied linear RGBA.

Class Members
float	offset = 0.0f	Stop offset in [0, 1].
float	rgba[4] = {0.0f, 0.0f, 0.0f, 1.0f}	Premultiplied linear RGBA color.

Member Data Documentation

◆ endGrad

Vector2d donner::geode::LinearGradientParams::endGrad = Vector2d::Zero()

End point in gradient space.

◆ gradientFromPath

Transform2d donner::geode::LinearGradientParams::gradientFromPath

Affine transform that maps a path-space sample position to gradient space. The fragment shader uses this to recover the gradient parameter t per pixel. This is the inverse of pathFromGradient and already bakes in both gradientUnits and the gradientTransform attribute.

◆ spreadMode

uint32_t donner::geode::LinearGradientParams::spreadMode = 0

Spread mode at the edges of the gradient range. 0 = pad, 1 = reflect, 2 = repeat.

◆ startGrad

Vector2d donner::geode::LinearGradientParams::startGrad = Vector2d::Zero()

Start point in gradient space.

◆ stops

std::span<const Stop> donner::geode::LinearGradientParams::stops

Gradient stops (capped at 16 entries by the underlying uniform buffer).

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

donner/svg/renderer/geode/GeoEncoder.h

Classes

Public Attributes