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

namespace SixLabors.Fonts.Tables.General.Colr {
  /// <summary>
  /// Defines the composite (blending) modes used by COLR v1 PaintComposite (format 32) and PaintVarComposite (format 33).
  /// Includes Porter-Duff compositing operators and separable color blend modes.
  /// <see href="https://learn.microsoft.com/en-us/typography/opentype/spec/colr#compositemode"/>
  /// </summary>
  internal enum ColrCompositeMode : byte
  {
      /// <summary>
      /// Porter-Duff Clear: no output.
      /// </summary>
      Clear = 0,

      /// <summary>
      /// Porter-Duff Src: source only.
      /// </summary>
      Src = 1,

      /// <summary>
      /// Porter-Duff Dest: destination only.
      /// </summary>
      Dst = 2,

      /// <summary>
      /// Porter-Duff Src Over: source over destination.
      /// </summary>
      SrcOver = 3,

      /// <summary>
      /// Porter-Duff Dest Over: destination over source.
      /// </summary>
      DstOver = 4,

      /// <summary>
      /// Porter-Duff Src In: source where destination exists.
      /// </summary>
      SrcIn = 5,

      /// <summary>
      /// Porter-Duff Dest In: destination where source exists.
      /// </summary>
      DstIn = 6,

      /// <summary>
      /// Porter-Duff Src Out: source where destination does not exist.
      /// </summary>
      SrcOut = 7,

      /// <summary>
      /// Porter-Duff Dest Out: destination where source does not exist.
      /// </summary>
      DstOut = 8,

      /// <summary>
      /// Porter-Duff Src Atop: source atop destination.
      /// </summary>
      SrcAtop = 9,

      /// <summary>
      /// Porter-Duff Dest Atop: destination atop source.
      /// </summary>
      DstAtop = 10,

      /// <summary>
      /// Porter-Duff Xor: exclusive OR of source and destination.
      /// </summary>
      Xor = 11,

      /// <summary>
      /// Porter-Duff Plus: additive blending.
      /// </summary>
      Plus = 12,

      /// <summary>
      /// Screen blend mode.
      /// </summary>
      Screen = 13,

      /// <summary>
      /// Overlay blend mode.
      /// </summary>
      Overlay = 14,

      /// <summary>
      /// Darken blend mode: selects the darker of source and destination.
      /// </summary>
      Darken = 15,

      /// <summary>
      /// Lighten blend mode: selects the lighter of source and destination.
      /// </summary>
      Lighten = 16,

      /// <summary>
      /// Color dodge blend mode.
      /// </summary>
      ColorDodge = 17,

      /// <summary>
      /// Color burn blend mode.
      /// </summary>
      ColorBurn = 18,

      /// <summary>
      /// Hard light blend mode.
      /// </summary>
      HardLight = 19,

      /// <summary>
      /// Soft light blend mode.
      /// </summary>
      SoftLight = 20,

      /// <summary>
      /// Difference blend mode.
      /// </summary>
      Difference = 21,

      /// <summary>
      /// Exclusion blend mode.
      /// </summary>
      Exclusion = 22,

      /// <summary>
      /// Multiply blend mode.
      /// </summary>
      Multiply = 23,

      /// <summary>
      /// Hue blend mode: applies the hue of the source to the destination.
      /// </summary>
      Hue = 24,

      /// <summary>
      /// Saturation blend mode: applies the saturation of the source to the destination.
      /// </summary>
      Saturation = 25,

      /// <summary>
      /// Color blend mode: applies the hue and saturation of the source to the destination.
      /// </summary>
      Color = 26,

      /// <summary>
      /// Luminosity blend mode: applies the luminosity of the source to the destination.
      /// </summary>
      Luminosity = 27
  }
}