2023-05-20 06:43:19 +12:00
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// <copyright file="ImagingHelper.cs" company="PlaceholderCompany">
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// Copyright (c) PlaceholderCompany. All rights reserved.
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// </copyright>
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namespace SystemTrayMenu.Helpers
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{
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using System.Drawing;
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using System.Drawing.Imaging;
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using System.IO;
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using System.Windows.Media;
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using System.Windows.Media.Imaging;
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/// <summary>
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/// Provides helper methods for imaging.
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/// </summary>
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internal static class ImagingHelper
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{
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/// <summary>
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/// Converts a PNG image to a icon (ico).
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/// </summary>
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/// <param name="input">The input stream.</param>
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/// <param name="output">The output stream.</param>
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/// <param name="size">The size (16x16 px by default).</param>
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/// <param name="preserveAspectRatio">Preserve the aspect ratio.</param>
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/// <returns>Wether or not the icon was succesfully generated.</returns>
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internal static bool ConvertToIcon(Stream input, Stream output, int size = 16, bool preserveAspectRatio = false)
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{
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Bitmap inputBitmap = (Bitmap)Image.FromStream(input);
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if (inputBitmap != null)
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{
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int width, height;
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if (preserveAspectRatio)
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{
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width = size;
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height = inputBitmap.Height / inputBitmap.Width * size;
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}
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else
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{
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width = height = size;
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}
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Bitmap newBitmap = new(inputBitmap, new Size(width, height));
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if (newBitmap != null)
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{
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// save the resized png into a memory stream for future use
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using MemoryStream memoryStream = new();
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newBitmap.Save(memoryStream, ImageFormat.Png);
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BinaryWriter iconWriter = new(output);
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if (output != null && iconWriter != null)
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{
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// 0-1 reserved, 0
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iconWriter.Write((byte)0);
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iconWriter.Write((byte)0);
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// 2-3 image type, 1 = icon, 2 = cursor
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iconWriter.Write((short)1);
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// 4-5 number of images
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iconWriter.Write((short)1);
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// image entry 1
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// 0 image width
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iconWriter.Write((byte)width);
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// 1 image height
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iconWriter.Write((byte)height);
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// 2 number of colors
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iconWriter.Write((byte)0);
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// 3 reserved
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iconWriter.Write((byte)0);
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// 4-5 color planes
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iconWriter.Write((short)0);
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// 6-7 bits per pixel
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iconWriter.Write((short)32);
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// 8-11 size of image data
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iconWriter.Write((int)memoryStream.Length);
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// 12-15 offset of image data
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iconWriter.Write(6 + 16);
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// write image data
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// png data must contain the whole png data file
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iconWriter.Write(memoryStream.ToArray());
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iconWriter.Flush();
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return true;
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}
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}
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return false;
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}
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return false;
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}
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/// <summary>
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/// Converts a PNG image to a icon (ico).
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/// </summary>
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/// <param name="inputPath">The input path.</param>
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/// <param name="outputPath">The output path.</param>
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/// <param name="size">The size (16x16 px by default).</param>
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/// <param name="preserveAspectRatio">Preserve the aspect ratio.</param>
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/// <returns>Wether or not the icon was succesfully generated.</returns>
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internal static bool ConvertToIcon(string inputPath, string outputPath, int size = 16, bool preserveAspectRatio = false)
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{
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using FileStream inputStream = new(inputPath, FileMode.Open);
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using FileStream outputStream = new(outputPath, FileMode.OpenOrCreate);
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return ConvertToIcon(inputStream, outputStream, size, preserveAspectRatio);
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}
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2023-08-12 12:33:11 +12:00
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/// <summary>
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/// Renders an image on top of an image.
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/// </summary>
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/// <param name="originalBitmap">Base image (remains unchanged).</param>
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/// <param name="overlayBitmap">Image on top (remains unchanged).</param>
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/// <returns>Rendered image.</returns>
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2023-05-20 06:43:19 +12:00
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internal static RenderTargetBitmap CreateIconWithOverlay(BitmapSource originalBitmap, BitmapSource overlayBitmap)
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{
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2023-08-12 12:33:11 +12:00
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DrawingVisual dVisual = new ();
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2023-05-20 06:43:19 +12:00
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using (DrawingContext dc = dVisual.RenderOpen())
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{
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dc.DrawImage(originalBitmap, new (0, 0, originalBitmap.PixelWidth, originalBitmap.PixelHeight));
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2023-08-12 12:33:11 +12:00
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dc.DrawImage(overlayBitmap, new (0, 0, originalBitmap.PixelWidth, originalBitmap.PixelHeight));
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2023-05-20 06:43:19 +12:00
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}
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RenderTargetBitmap targetBitmap = new (originalBitmap.PixelWidth, originalBitmap.PixelHeight, originalBitmap.DpiX, originalBitmap.DpiY, PixelFormats.Default);
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targetBitmap.Render(dVisual);
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return targetBitmap;
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}
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2023-08-12 12:33:11 +12:00
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/// <summary>
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/// Sets a flat the alpha channel value for an image.
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/// </summary>
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/// <param name="originalBitmap">Base image (remains unchanged).</param>
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/// <param name="opacity">Opacity value.</param>
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/// <returns>Rendered image.</returns>
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internal static RenderTargetBitmap ApplyOpactiy(BitmapSource originalBitmap, double opacity)
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{
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DrawingVisual dVisual = new ();
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using (DrawingContext dc = dVisual.RenderOpen())
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{
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dc.PushOpacity(opacity);
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dc.DrawImage(originalBitmap, new(0, 0, originalBitmap.PixelWidth, originalBitmap.PixelHeight));
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}
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RenderTargetBitmap targetBitmap = new(originalBitmap.PixelWidth, originalBitmap.PixelHeight, originalBitmap.DpiX, originalBitmap.DpiY, PixelFormats.Default);
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targetBitmap.Render(dVisual);
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return targetBitmap;
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}
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2023-05-20 06:43:19 +12:00
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}
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}
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