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

using System.Collections.Generic;
using System.Numerics;

namespace SixLabors.Fonts.Rendering {
  /// <summary>
  /// A single painted layer comprising a paint, a fill rule, and a path stream.
  /// All coordinates must be pre-transformed in Fonts prior to construction.
  /// </summary>
  internal readonly struct PaintedLayer
  {
      /// <summary>
      /// Initializes a new instance of the <see cref="PaintedLayer"/> struct.
      /// </summary>
      /// <param name="paint">The paint definition.</param>
      /// <param name="fillRule">The fill rule.</param>
      /// <param name="transform">The transform applied to all path coordinates.</param>
      /// <param name="clipBounds">An optional clip bounds to apply when rasterizing this layer.</param>
      /// <param name="path">The path command stream for this layer.</param>
      public PaintedLayer(
          Paint? paint,
          FillRule fillRule,
          Matrix3x2 transform,
          Bounds? clipBounds,
          IReadOnlyList<PathCommand> path)
      {
          this.Paint = paint;
          this.FillRule = fillRule;
          this.Transform = transform;
          this.ClipBounds = clipBounds;
          this.Path = path;
      }

      /// <summary>
      /// Gets the paint definition for this layer.
      /// </summary>
      public Paint? Paint { get; }

      /// <summary>
      /// Gets the fill rule for rasterization.
      /// </summary>
      public FillRule FillRule { get; }

      /// <summary>
      /// Gets the transform applied to all path coordinates.
      /// </summary>
      public Matrix3x2 Transform { get; }

      public Bounds? ClipBounds { get; }

      /// <summary>
      /// Gets the path stream for this layer.
      /// </summary>
      public IReadOnlyList<PathCommand> Path { get; }
  }
}