Enum SoftMaskKind

Namespace

Egami.Drawing

Assembly

Egami.Drawing.dll

Which value of a soft mask's drawing becomes the mask, as PDF's soft mask subtypes.

public enum SoftMaskKind

Fields

Alpha = 0

The drawing's alpha.

Luminosity = 1

The drawing's luminosity over the backdrop color: Rec. 709 weights on the encoded values, as PDF uses.

Examples

using (RasterCanvas<Rgba8> canvas = raster.CreateCanvas())
{
    // A luminosity mask, as a PDF soft mask: white shows the photo, black hides it, a gradient fades it out to the right.
    RectF area = new(0, 0, photo.Width, photo.Height);
    SoftMask fade = new(mask => mask.FillRect(area, new LinearGradient(new Vector2(area.Width * 0.6f, 0), new Vector2(area.Width, 0), new RgbaF32(1, 1, 1, 1), new RgbaF32(0, 0, 0, 1))));
    canvas.SaveLayer(new LayerOptions { Mask = fade });
    canvas.DrawImage(photo, Vector2.Zero);
    canvas.Restore();
}