// Copyright (c) Six Labors.
// Licensed under the Six Labors Split License.

using System.Collections.Generic;

namespace SixLabors.Fonts.Rendering {
  /// <summary>
  /// A glyph fully decomposed into painted layers ready for rendering.
  /// </summary>
  internal readonly struct PaintedGlyph
  {
      /// <summary>
      /// Initializes a new instance of the <see cref="PaintedGlyph"/> struct.
      /// </summary>
      /// <param name="layers">The painted layers.</param>
      public PaintedGlyph(List<PaintedLayer> layers) => this.Layers = layers;

      /// <summary>
      /// Gets the layers for this glyph.
      /// </summary>
      public IReadOnlyList<PaintedLayer> Layers { get; }

      /// <summary>
      /// Gets a value indicating whether this glyph has no layers.
      /// </summary>
      public bool IsEmpty => this.Layers.Count == 0;

      /// <summary>
      /// Gets an empty glyph instance.
      /// </summary>
      public static PaintedGlyph Empty => new([]);
  }
}