EraseStroke<TPixel>

Namespace Nfty.Core.Editing in assembly Nfty.Core.

public sealed class EraseStroke<TPixel> : RegionEditCommand<TPixel>

Erases to transparency — sets alpha to 0, keeping every other channel — along a path.

Type parameters

• TPixel - The pixel the target surface stores.

Constructors

EraseStroke(int, IReadOnlyList<(int, int)>, OpacityLock)

public EraseStroke(int size, IReadOnlyList<(int, int)> path, OpacityLock opacity = OpacityLock.Locked);

Erases along a stroke.

Parameters

• size (int) - Brush diameter in pixels.
• path (IReadOnlyList<(int, int)>) - The gesture's pixel path.
• opacity (OpacityLock) - Carried for symmetry with the other commands; erase writes alpha 0, which both modes admit unchanged.

Methods

ComputePixels(IEditSurface<TPixel>)

protected override IReadOnlyList<(int, int, TPixel)> ComputePixels(IEditSurface<TPixel> surface);

Target pixels and their new values. Only in-bounds pixels, each coordinate at most once; computed before any mutation.

Parameters

• surface (IEditSurface<TPixel>) - The surface being edited, for reading the pixels the edit depends on.

Returns. The pixels to write, before the opacity lock is applied to them.