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

using System.Numerics;

namespace SixLabors.Fonts.Rendering {
  /// <summary>
  /// Canvas metadata describing the document-space coordinate system for a painted glyph.
  /// </summary>
  internal readonly struct PaintedCanvasMetadata
  {
      /// <summary>
      /// Initializes a new instance of the <see cref="PaintedCanvasMetadata"/> struct.
      /// </summary>
      /// <param name="viewBox">The viewBox rectangle (minX, minY, width, height).</param>
      /// <param name="isYDown">True if the source coordinate system is y-down; false if y-up.</param>
      /// <param name="rootTransform">An optional root transform in document-space.</param>
      public PaintedCanvasMetadata(FontRectangle viewBox, bool isYDown, Matrix3x2 rootTransform)
      {
          this.HasViewBox = viewBox != FontRectangle.Empty;
          this.ViewBox = viewBox;
          this.IsYDown = isYDown;
          this.RootTransform = rootTransform;
      }

      /// <summary>
      /// Gets a value indicating whether a root viewBox is present.
      /// </summary>
      public bool HasViewBox { get; }

      /// <summary>
      /// Gets the viewBox.
      /// </summary>
      public FontRectangle ViewBox { get; }

      /// <summary>
      /// Gets a value indicating whether the source coordinate system is y-down.
      /// </summary>
      public bool IsYDown { get; }

      /// <summary>
      /// Gets the root transform in document-space.
      /// </summary>
      public Matrix3x2 RootTransform { get; }
  }
}