Restore SEBPatch

SafeExamBrowser.Settings/Proctoring/ImageQuantization.cs

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+/*
+ * Copyright (c) 2024 ETH Zürich, IT Services
+ * 
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+namespace SafeExamBrowser.Settings.Proctoring
+{
+	/// <summary>
+	/// Defines all possible image quantization algorithms for the screen proctoring.
+	/// </summary>
+	public enum ImageQuantization
+	{
+		/// <summary>
+		/// Reduces an image to a black and white image with 1 bit per pixel.
+		/// </summary>
+		BlackAndWhite1bpp,
+
+		/// <summary>
+		/// Reduces an image to a colored image with 8 bits per pixel (256 colors).
+		/// </summary>
+		Color8bpp,
+
+		/// <summary>
+		/// Reduces an image to a colored image with 16 bits per pixel (5 bits per color and the remaining bit unused, thus 32'768 colors).
+		/// </summary>
+		Color16bpp,
+
+		/// <summary>
+		/// Reduces an image to a colored image with 24 bits per pixel (16'777'216 colors).
+		/// </summary>
+		Color24bpp,
+
+		/// <summary>
+		/// Reduces an image to a grayscale image with 2 bits per pixel (4 shades).
+		/// </summary>
+		Grayscale2bpp,
+
+		/// <summary>
+		/// Reduces an image to a grayscale image with 4 bits per pixel (16 shades).
+		/// </summary>
+		Grayscale4bpp,
+
+		/// <summary>
+		/// Reduces an image to a grayscale image with 8 bits per pixel (256 shades).
+		/// </summary>
+		Grayscale8bpp
+	}
+}