public static SKAlphaType GetAlphaType()

in binding/SkiaSharp/Definitions.cs [153:201]
41 lines of code
26 McCabe index (conditional complexity)

		public static SKAlphaType GetAlphaType (this SKColorType colorType, SKAlphaType alphaType = SKAlphaType.Premul)
		{
			switch (colorType) {
				case SKColorType.Unknown:
					alphaType = SKAlphaType.Unknown;
					break;

				// opaque or premul
				case SKColorType.Alpha8:
				case SKColorType.Alpha16:
				case SKColorType.AlphaF16:
					if (SKAlphaType.Unpremul == alphaType) {
						alphaType = SKAlphaType.Premul;
					}
					break;

				// any
				case SKColorType.Argb4444:
				case SKColorType.Rgba8888:
				case SKColorType.Bgra8888:
				case SKColorType.Srgba8888:
				case SKColorType.Rgba1010102:
				case SKColorType.Bgra1010102:
				case SKColorType.RgbaF16Clamped:
				case SKColorType.RgbaF16:
				case SKColorType.RgbaF32:
				case SKColorType.Rgba16161616:
					break;

				// opaque
				case SKColorType.Gray8:
				case SKColorType.Rg88:
				case SKColorType.Rg1616:
				case SKColorType.RgF16:
				case SKColorType.Rgb565:
				case SKColorType.Rgb888x:
				case SKColorType.Rgb101010x:
				case SKColorType.Bgr101010x:
				case SKColorType.Bgr101010xXR:
				case SKColorType.R8Unorm:
					alphaType = SKAlphaType.Opaque;
					break;

				default:
					throw new ArgumentOutOfRangeException (nameof (colorType), $"Unknown color type: '{colorType}'");
			}

			return alphaType;
		}