SkShadowTessellator Namespace Reference

Typedefs
typedef std::function< SkScalar(SkScalar, SkScalar)>	HeightFunc

Functions
sk_sp< SkVertices >	MakeAmbient (const SkPath &path, const SkMatrix &ctm, const SkPoint3 &zPlane, bool transparent)
sk_sp< SkVertices >	MakeSpot (const SkPath &path, const SkMatrix &ctm, const SkPoint3 &zPlane, const SkPoint3 &lightPos, SkScalar lightRadius, bool transparent, bool directional)

Typedef Documentation

HeightFunc

typedef std::function<SkScalar(SkScalar, SkScalar)> SkShadowTessellator::HeightFunc

Definition at line 25 of file SkShadowTessellator.h.

Function Documentation

MakeAmbient()

sk_sp< SkVertices > SkShadowTessellator::MakeAmbient	(	const SkPath &	path,
		const SkMatrix &	ctm,
		const SkPoint3 &	zPlane,
		bool	transparent
	)

This function generates an ambient shadow mesh for a path by walking the path, outsetting by the radius, and setting inner and outer colors to umbraColor and penumbraColor, respectively. If transparent is true, then the center of the ambient shadow will be filled in.

Definition at line 1167 of file SkShadowTessellator.cpp.

                                                                                             {
    if (!ctm.mapRect(path.getBounds()).isFinite() || !zPlane.isFinite()) {
        return nullptr;
    }
    SkAmbientShadowTessellator ambientTess(path, ctm, zPlane, transparent);
    return ambientTess.releaseVertices();
}

MakeSpot()

sk_sp< SkVertices > SkShadowTessellator::MakeSpot	(	const SkPath &	path,
		const SkMatrix &	ctm,
		const SkPoint3 &	zPlane,
		const SkPoint3 &	lightPos,
		SkScalar	lightRadius,
		bool	transparent,
		bool	directional
	)

This function generates a spot shadow mesh for a path by walking the transformed path, further transforming by the scale and translation, and outsetting and insetting by a radius. The center will be clipped against the original path unless transparent is true.

Definition at line 1176 of file SkShadowTessellator.cpp.

                                                                  {
    if (!ctm.mapRect(path.getBounds()).isFinite() || !zPlane.isFinite() ||
        !lightPos.isFinite() || !(lightPos.fZ >= SK_ScalarNearlyZero) ||
        !SkIsFinite(lightRadius) || !(lightRadius >= SK_ScalarNearlyZero)) {
        return nullptr;
    }
    SkSpotShadowTessellator spotTess(path, ctm, zPlane, lightPos, lightRadius, transparent,
                                     directional);
    return spotTess.releaseVertices();
}