93 lines
3.3 KiB
C#
93 lines
3.3 KiB
C#
/*
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* Copyright (c) 2024 ETH Zürich, IT Services
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*/
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using System;
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using System.Drawing;
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using System.Drawing.Imaging;
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using System.Windows.Forms;
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using KGySoft.Drawing.Imaging;
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using SafeExamBrowser.Settings.Proctoring;
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using ImageFormat = SafeExamBrowser.Settings.Proctoring.ImageFormat;
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namespace SafeExamBrowser.Proctoring.ScreenProctoring.Imaging
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{
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internal static class Extensions
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{
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internal static void DrawCursorPosition(this Graphics graphics)
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{
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graphics.DrawArc(new Pen(Color.Red, 3), Cursor.Position.X - 25, Cursor.Position.Y - 25, 50, 50, 0, 360);
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graphics.DrawArc(new Pen(Color.Yellow, 3), Cursor.Position.X - 22, Cursor.Position.Y - 22, 44, 44, 0, 360);
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graphics.FillEllipse(Brushes.Red, Cursor.Position.X - 4, Cursor.Position.Y - 4, 8, 8);
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graphics.FillEllipse(Brushes.Yellow, Cursor.Position.X - 2, Cursor.Position.Y - 2, 4, 4);
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}
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internal static PixelFormat ToPixelFormat(this ImageQuantization quantization)
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{
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switch (quantization)
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{
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case ImageQuantization.BlackAndWhite1bpp:
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return PixelFormat.Format1bppIndexed;
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case ImageQuantization.Color8bpp:
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return PixelFormat.Format8bppIndexed;
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case ImageQuantization.Color16bpp:
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return PixelFormat.Format16bppArgb1555;
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case ImageQuantization.Color24bpp:
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return PixelFormat.Format24bppRgb;
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case ImageQuantization.Grayscale2bpp:
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return PixelFormat.Format4bppIndexed;
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case ImageQuantization.Grayscale4bpp:
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return PixelFormat.Format4bppIndexed;
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case ImageQuantization.Grayscale8bpp:
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return PixelFormat.Format8bppIndexed;
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default:
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throw new NotImplementedException($"Image quantization '{quantization}' is not yet implemented!");
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}
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}
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internal static IQuantizer ToQuantizer(this ImageQuantization quantization)
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{
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switch (quantization)
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{
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case ImageQuantization.BlackAndWhite1bpp:
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return PredefinedColorsQuantizer.BlackAndWhite();
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case ImageQuantization.Color8bpp:
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return PredefinedColorsQuantizer.SystemDefault8BppPalette();
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case ImageQuantization.Color16bpp:
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return PredefinedColorsQuantizer.Rgb555();
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case ImageQuantization.Color24bpp:
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return PredefinedColorsQuantizer.Rgb888();
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case ImageQuantization.Grayscale2bpp:
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return PredefinedColorsQuantizer.Grayscale4();
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case ImageQuantization.Grayscale4bpp:
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return PredefinedColorsQuantizer.Grayscale16();
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case ImageQuantization.Grayscale8bpp:
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return PredefinedColorsQuantizer.Grayscale();
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default:
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throw new NotImplementedException($"Image quantization '{quantization}' is not yet implemented!");
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}
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}
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internal static System.Drawing.Imaging.ImageFormat ToSystemFormat(this ImageFormat format)
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{
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switch (format)
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{
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case ImageFormat.Bmp:
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return System.Drawing.Imaging.ImageFormat.Bmp;
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case ImageFormat.Gif:
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return System.Drawing.Imaging.ImageFormat.Gif;
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case ImageFormat.Jpg:
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return System.Drawing.Imaging.ImageFormat.Jpeg;
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case ImageFormat.Png:
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return System.Drawing.Imaging.ImageFormat.Png;
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default:
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throw new NotImplementedException($"Image format '{format}' is not yet implemented!");
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}
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}
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}
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}
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